CN111823823B - Air Conditioning Systems and Vehicles - Google Patents

Abstract

The present application relates to an air-conditioning system and a vehicle, and relates to the field of air-conditioning manufacturing. The air conditioning system includes: a liquid accumulator, a first heat exchanger, a second heat exchanger and a third heat exchanger, a mode switching device and a controller, the first heat exchanger including a first fluid port and a second fluid port a first refrigerant passage, a second heat exchanger including a second refrigerant passage having a third fluid port and a fourth fluid port, the third heat exchanger including a third refrigerant having a fifth fluid port and a sixth fluid port a channel; the mode switching device has at least a first port to a fifth port, the first fluid port, the third fluid port, and the fifth fluid port communicate with each other, the second fluid port communicates with the first port, and the fourth fluid port communicates with the second port In communication, the sixth fluid port communicates with the third port, one fluid port of the reservoir communicates with the fourth port, and the other fluid port of the reservoir communicates with the fifth port. The present application enriches the functions of the air conditioning system.

Description

Air Conditioning Systems and Vehicles

technical field

The present application relates to the field of air-conditioning manufacturing, and in particular, to an air-conditioning system and a vehicle.

Background technique

With the development of air conditioners, the diversification of air conditioner functions has become a major development trend. The current air conditioning system usually can only adjust the temperature of a target that needs to be temperature adjusted (such as a passenger compartment of a vehicle), and has a relatively single function.

SUMMARY OF THE INVENTION

The present application provides an air-conditioning system and a vehicle, which can solve the problem of single air-conditioning function to a certain extent. The technical solution is as follows:

In a first aspect, an air conditioning system is provided, the air conditioning system includes: a liquid accumulator, three heat exchangers, a mode switching device, and a controller. Wherein, the accumulator is used for storing refrigerant, and the accumulator has two fluid ports.

The three heat exchangers are respectively a first heat exchanger, a second heat exchanger and a third heat exchanger, the first heat exchanger includes a first refrigerant passage, and the first refrigerant passage has two two fluid ports, respectively a first fluid port and a second fluid port. The second heat exchanger includes a second refrigerant passage having two fluid ports, a third fluid port and a fourth fluid port, respectively. The third heat exchanger includes a third refrigerant passage having two fluid ports, a fifth fluid port and a sixth fluid port, respectively. Illustratively, each of the three heat exchangers may be a parallel flow heat exchanger, a plate heat exchanger (also known as a water cooler), a shell-and-tube heat exchanger, or a shell-and-tube heat exchanger, etc., The controller may be an electronic control unit (Electronic Control Unit, ECU) or a central processing unit (Central Processing Unit, CPU).

The mode switching device has at least five fluid ports, the at least five fluid ports include a first port, a second port, a third port, a fourth port and a fifth port, the first fluid port, the third port Three fluid ports are communicated with the fifth fluid port, the second fluid port is communicated with the first port, the fourth fluid port is communicated with the second port, and the sixth fluid port is communicated with the first fluid port. Three-port communication, one fluid port of the reservoir communicates with the fourth port, and the other fluid port of the reservoir communicates with the fifth port.

The controller is configured to send a first instruction to the mode switching device to control the communication between the first port and the fifth port in the mode switching device, and the communication between the third port and the fourth port, So that the compressed refrigerant passes through the third refrigerant passage, the accumulator and the first refrigerant passage in sequence.

The controller is further configured to send a second instruction to the mode switching device to control the fifth port of the mode switching device to communicate with the first port and the second port respectively, and the third port It communicates with the fourth port, so that the compressed refrigerant passes through the third refrigerant passage and the accumulator, and then passes through the first refrigerant passage and the second refrigerant passage respectively.

The controller is further configured to send a third instruction to the mode switching device, so that the second port and the fifth port of the mode switching device communicate with each other, and the third port communicates with the fourth port , so that the compressed refrigerant passes through the third refrigerant passage, the accumulator and the second refrigerant passage in sequence.

The controller is further configured to send a fourth instruction to the mode switching device to control the third port of the mode switching device to communicate with the fifth port, and the second port to communicate with the fourth port , so that the compressed refrigerant passes through the second refrigerant passage, the accumulator and the third refrigerant passage in sequence.

In this way, since the air conditioning system can realize four working modes, the functions of the air conditioning system are enriched. Further, the at least four temperature adjustment modes can perform temperature adjustment for multiple objects (such as spaces or devices), without having to equip each object with an air conditioning system, reducing the occupation of space and saving the manufacturing cost of the air conditioning system.

Optionally, the mode switching device includes: a first valve, a second valve, a third valve, a fourth valve and a fifth valve. One end of the first valve, one end of the second valve and one end of the third valve are all communicated with the fifth port, the other end of the first valve is communicated with the first port, and the The other end of the second valve communicates with the second port, the other end of the third valve communicates with the third port, and both the fourth valve and the fifth valve communicate with the first The four ports communicate with each other, the other end of the fourth valve communicates with the third port, and the other end of the fifth valve communicates with the second port.

After the mode switching device receives the first instruction, the first valve and the fourth valve are opened, and the second valve, the third valve and the fifth valve are closed;

After the mode switching device receives the second command, the first valve, the second valve and the fourth valve are opened, and the third valve and the fifth valve are closed;

After the mode switching device receives the third instruction, the second valve and the fourth valve are opened, and the first valve, the third valve and the fifth valve are closed;

After the mode switching device receives the fourth command, the third valve and the fifth valve are opened, and the first valve, the second valve and the fourth valve are closed.

In this way, in the air-conditioning system, four kinds of commands can be executed respectively by controlling the switch state of each valve in the mode switching device, so that the air-conditioning system can be in different working modes, which satisfies the switching requirements of the working modes of the air-conditioning system. The way of switching the working mode of the air-conditioning system is simplified, and the structural complexity of the air-conditioning system is reduced.

Optionally, the air conditioning system further includes: a compression device, the compression device is communicated with the three heat exchangers, and the compression device is used for compressing the refrigerant. By way of example, the compression device may be a compressor. Wherein, the compression device has a suction pipe and an exhaust pipe.

Taking the air-conditioning system as an example of a vehicle-mounted air-conditioning system including a passenger compartment and a battery pack, the heat generated by the battery pack during operation is usually higher than that of the passenger compartment. In particular, the battery pack generates heat during charging. The heat is usually 3 to 5 times the heat generated by the passenger compartment, so the air conditioning system needs to adjust the temperature in a large range. The quality of the required refrigerant is quite different, and since the quality of the refrigerant required for the cooling and heating of the passenger compartment is also different, the air conditioning system needs the liquid accumulator to adjust the air conditioning system with the cooperation of the compression device. The quality of medium refrigerant to meet different work demands. Since the mass of the refrigerant required by the air-conditioning system to cool the battery pack is relatively large, the mass of the refrigerant flowing through the first heat exchanger to the compression device is relatively large, which may result in a relatively high pressure of the refrigerant flowing into the compression device, while When the air-conditioning system is working normally, the pressure at the suction pipe of the compression device should not be too large. Therefore, a flow control valve is required to control the flow of the refrigerant at the suction pipe to adjust the pressure at the suction pipe of the compression device. Efficient work of the air conditioning system.

Optionally, the air conditioning system further comprises: a flow control valve, which is used for flow control to adjust the pressure at the suction pipe of the compression device, the flow control valve is respectively connected with the first fluid port of the first heat exchanger It communicates with the suction pipe of the compression device. For example, the flow control valve may be a solenoid valve.

Optionally, the air conditioning system further comprises: a four-way reversing valve, so as to realize the effective reversal of the circulation path of the air conditioning system in different modes. The four-way reversing valve has four nozzles, the four nozzles are a first nozzle, a second nozzle, a third nozzle and a fourth nozzle, the first nozzle and the The suction pipe of the compression device is in communication, the second nozzle is in communication with the exhaust pipe of the compression device, the third nozzle is in communication with the third fluid port, and the fourth nozzle is in communication with the first nozzle. Five fluid ports communicate.

The controller is further configured to send the first command, the second command or the third command to the four-way reversing valve to control the communication between the second nozzle and the fourth nozzle of the four-way reversing valve, And the first nozzle and the third nozzle are communicated, and the conduction direction of the second nozzle and the fourth nozzle after the communication is from the second nozzle to the fourth nozzle, after the communication The conduction direction of the first nozzle and the third nozzle is from the third nozzle to the first nozzle, so that the refrigerant flowing out from the second heat exchanger can pass through the four-way commutation in turn. The third nozzle of the valve flows to the first nozzle to flow to the compression device, and after passing through the compression device, it flows to the fourth nozzle through the second nozzle of the four-way reversing valve to flow to the third heat exchanger. The conduction direction refers to the current flow direction of the medium in the four-way reversing valve. Correspondingly, the medium is prohibited from flowing in the opposite direction of the current conduction direction.

The controller is further configured to send a fourth instruction to the mode switching device to control the communication between the second nozzle and the third nozzle of the four-way reversing valve, and the first nozzle and the fourth nozzle The nozzles are connected, the conduction direction of the second nozzle and the third nozzle after the communication is from the second nozzle to the third nozzle, and the first nozzle and the fourth nozzle after the communication are conducted. The opening direction is from the fourth nozzle to the first nozzle. In this way, the refrigerant flowing out of the third heat exchanger flows through the fourth nozzle of the four-way reversing valve to the first nozzle in turn, so as to flow to the compression device. After passing through the compression device, it passes through the second nozzle of the four-way reversing valve. The nozzle flows to the third nozzle for flow to the second heat exchanger.

Optionally, the air conditioning system further includes: a first throttle device, the first throttle device is disposed between the liquid accumulator and the mode switching device, and the first throttle device is configured to The flow of refrigerant into the three heat exchangers is controlled.

Further, because under normal circumstances, the refrigerant flowing into the first throttling device is a low-temperature and high-pressure refrigerant flowing through the condenser, and is throttled by the first throttling device to become a low-temperature and low-pressure refrigerant (that is, the first throttling device). The flow device is used to reduce the pressure of the refrigerant flowing into the first throttling device, and output the reduced pressure refrigerant), and then flow into the evaporator, and the accumulator is usually located on the high-pressure side (in the air-conditioning system, refrigeration Therefore, the first throttling device is usually arranged between the accumulator and the evaporator, then the first throttling device can be placed on another fluid port of the accumulator and the mode switching device between the fifth port of the air conditioning system, which ensures that no matter which working mode the air conditioning system is in, the accumulator is on the high pressure side, so that the air conditioning system only needs to use one accumulator, which reduces the complexity of the air conditioning system degree, reducing the volume and saving space.

Further, the air conditioning system further comprises: an on-off valve and a second throttle device, the on-off valve and the second throttle device are connected in series, and the series-connected second throttle device and the on-off valve are arranged at the between another fluid port of the accumulator and the fifth port, and in parallel with the first throttling device, the controller is further configured to control the on-off valve after the first instruction is generated on. In this way, since the flow path of the refrigerant at the outlet of the accumulator is increased, the refrigerant can flow into the heat exchanger through the first throttling device and the auxiliary throttling device at the same time, thereby increasing the quality of the refrigerant in the heat exchanger, The cooling efficiency of the air conditioning system for the first target is improved. Optionally, both the first throttling device and the second throttling device are expansion valves, such as electronic expansion valves.

Optionally, the air-conditioning system further includes: a fan, the fan is located on one side of the second heat exchanger and/or the third heat exchanger, and the number of the fan can be one or more, the implementation of this application For example, the number of fans is not limited. In the embodiment of the present application, a plurality of fans may be provided on one side of the second heat exchanger and one side of the third heat exchanger, so that the air flow direction and/or the air flow rate can be adjusted effectively.

In a second aspect, an air conditioning system is provided, the air conditioning system includes: a liquid accumulator, three heat exchangers, a mode switching device, a compression device, a four-way reversing valve, and a controller. Wherein, the accumulator is used for storing refrigerant, and the accumulator has two fluid ports.

The three heat exchangers are respectively a first heat exchanger, a second heat exchanger and a third heat exchanger, the first heat exchanger includes a first refrigerant passage, and the first refrigerant passage has two two fluid ports, respectively a first fluid port and a second fluid port. The second heat exchanger includes a second refrigerant passage having two fluid ports, a third fluid port and a fourth fluid port, respectively. The third heat exchanger includes a third refrigerant passage, and the second refrigerant passage has two fluid ports, a fifth fluid port and a sixth fluid port, respectively.

The mode switching device includes: a first valve, a second valve, a third valve, a fourth valve and a fifth valve; one end of the first valve, one end of the second valve and one end of the third valve Both are communicated with one fluid port of the reservoir, the other end of the first valve is communicated with the second fluid port, the other end of the second valve is communicated with the fourth fluid port, and the first valve is communicated with the fourth fluid port. The other end of the three valves is in communication with the sixth fluid port, one end of the fourth valve and one end of the fifth valve are both in communication with the other fluid port of the accumulator, and the other end of the fourth valve is in communication with the other fluid port of the accumulator. One end communicates with the sixth fluid port, and the other end of the fifth valve communicates with the fourth fluid port.

The compressing device communicates with the first fluid port, the third fluid port and the fifth fluid port respectively, the compressing device is used for compressing the refrigerant, and the compressing device has a suction pipe and an exhaust pipe.

The four-way reversing valve has four nozzles, and the four nozzles are respectively a first nozzle, a second nozzle, a third nozzle and a fourth nozzle; the first nozzle and the The suction pipe of the compression device is in communication, the second nozzle is in communication with the exhaust pipe of the compression device, the third nozzle is in communication with the third fluid port, and the fourth nozzle is in communication with the first nozzle. Five fluid ports communicate.

The controller is configured to send a first command to the mode switching device and the four-way reversing valve, respectively, to control the first port and the fifth port in the mode switching device to communicate, and the third The port communicates with the fourth port, and controls the communication between the second nozzle and the fourth nozzle of the four-way reversing valve, and the communication between the first nozzle and the third nozzle, and the first nozzle after the communication is connected. The conduction direction of the second nozzle and the fourth nozzle is from the second nozzle to the fourth nozzle, and the conduction direction of the connected first nozzle and the third nozzle is from the third nozzle nozzle to the first nozzle.

The controller is further configured to send a second command to the mode switching device and the four-way reversing valve, respectively, to control the fifth port of the mode switching device to be connected with the first port and the first port respectively. The two ports are in communication, the third port is in communication with the fourth port, and the second port and the fourth port of the four-way reversing valve are controlled to communicate with each other, and the first port and the third port are in communication. The nozzles are connected, and the conduction direction of the second nozzle and the fourth nozzle after the communication is from the second nozzle to the fourth nozzle, and the first nozzle and the third nozzle after the communication are conducted. The opening direction is from the third nozzle to the first nozzle.

The controller is further configured to send a third command to the mode switching device and the four-way reversing valve respectively, so that the second port and the fifth port of the mode switching device are communicated, and the first The third port communicates with the fourth port, and controls the communication between the second port and the fourth port of the four-way reversing valve, and the communication between the first port and the third port, and the connected The conduction direction of the second nozzle and the fourth nozzle is from the second nozzle to the fourth nozzle, and the conduction direction of the connected first nozzle and the third nozzle is from the first nozzle to the fourth nozzle. Three nozzles to the first nozzle.

The controller is further configured to send a fourth instruction to the mode switching device and the four-way reversing valve respectively, to control the communication between the third port and the fifth port of the mode switching device, and the first The second port communicates with the fourth port, and controls the communication between the second port and the third port of the four-way reversing valve, and the communication between the first port and the fourth port, and the connected The conduction direction of the second nozzle and the third nozzle is from the second nozzle to the third nozzle, and the conduction direction of the connected first nozzle and the fourth nozzle is from the first nozzle to the third nozzle. Four nozzles to the first nozzle.

In a third aspect, a vehicle is provided, the vehicle comprising: a body, a passenger compartment provided inside the body, a battery pack and an air-conditioning system provided on the body, the air-conditioning system being the above-mentioned first aspect or the first The air conditioning system according to any one of the two aspects.

Optionally, the first refrigerant passage is used for heat exchange with a battery pack of the vehicle. The second refrigerant passage is used for heat exchange with the passenger compartment of the vehicle. The third refrigerant passage is used for heat exchange with the outside of the vehicle.

Further, the first heat exchanger is arranged around the battery pack, the second heat exchanger is arranged around the passenger compartment, and the third heat exchanger is arranged at the inlet of the front of the vehicle body. around the air grid. Since the distance between each heat exchanger and the target requiring heat exchange is relatively close, good heat exchange can be achieved, and the length of connecting pipes can be reduced, thereby saving costs.

Optionally, the battery pack of the vehicle may include: a pack body and a heat dissipation pipe disposed outside the pack body, the heat dissipation pipe accommodates a cooling liquid, and the first heat exchanger further includes a first medium channel, The first medium channel communicates with the heat dissipation pipe and forms a circuit of the cooling liquid. Wherein, the water inlet of the first medium channel can be connected with the water outlet of the heat dissipation pipe of the battery pack, and the water outlet of the first medium channel can be connected with the water inlet of the heat dissipation pipe, so that the first medium channel and the heat dissipation pipe of the battery pack are connected. communicate and form a circuit through which the cooling liquid can enter the first medium channel, so that when the air conditioning system cools the battery pack, the refrigerant in the first refrigerant channel exchanges heat with the cooling liquid in the first medium channel, The refrigerant is vaporized to absorb the heat of the cooling liquid, so as to realize the cooling of the cooling liquid, so that the cooled cooling liquid absorbs the heat of the package body in the heat dissipation pipe, and realizes the cooling treatment of the package body of the battery pack.

Optionally, the air conditioning system further includes: two temperature sensors, the two temperature sensors include a first temperature sensor and a second temperature sensor, the two temperature sensors are respectively connected to the controller, and the first temperature sensor is connected to the controller. A temperature sensor is used to detect the temperature of the passenger compartment of the vehicle, and the second temperature sensor is used to detect the temperature of the battery pack.

The controller is configured to: when the temperature of the battery pack detected by the second temperature sensor reaches a third temperature threshold, send the first instruction to the mode switching device, where the first instruction is used to instruct the battery Packages are individually refrigerated. When the temperature of the passenger compartment detected by the first temperature sensor reaches a first temperature threshold, and the temperature of the battery pack detected by the second temperature sensor reaches a third temperature threshold, sending a message to the mode switching device The second instruction is used to instruct the battery pack and the passenger compartment to be refrigerated at the same time. When the temperature of the passenger compartment detected by the first temperature sensor reaches a second temperature threshold, the third instruction is sent to the mode switching device, where the third instruction is used to instruct the passenger compartment to be refrigerated independently. When the temperature of the passenger compartment detected by the first temperature sensor reaches a first temperature threshold, the fourth instruction is sent to the mode switching device, where the fourth instruction is used to instruct the passenger compartment to be heated independently. Wherein, the first temperature threshold is greater than the second temperature threshold.

Optionally, the air conditioning system further includes: a humidity sensor, the humidity sensor is communicated with the controller, and the humidity sensor is used to detect the humidity of the passenger compartment. The controller is further configured to send the third instruction to the mode switching device when the humidity of the passenger compartment detected by the humidity sensor reaches a humidity threshold.

To sum up, in the air conditioning system provided by the embodiments of the present application, since the air conditioning system implements four working modes, the functions of the air conditioning system are enriched. Further, the at least four temperature adjustment modes can perform temperature adjustment for multiple objects (such as spaces or devices), without having to equip each object with an air conditioning system, reducing the occupation of space and saving the manufacturing cost of the air conditioning system. For example, the air-conditioning system may cool the first target with the refrigerant when the first heat exchanger communicates with the third heat exchanger, and cool the first target with the refrigerant when the second heat exchanger communicates with the third heat exchanger. Two-target cooling or heating, when the first heat exchanger, the second heat exchanger and the third heat exchanger are connected, the first target and the second target are simultaneously cooled by the refrigerant, which enriches the functions of the air-conditioning system, and Since the temperature of two targets can be adjusted, it is not necessary to equip each target with an air conditioning system, which reduces the occupation of space and saves the manufacturing cost of the air conditioning system.

Description of drawings

1 is a schematic structural diagram of an air-conditioning system in the related art;

2 is a schematic structural diagram of an air-conditioning system provided by an embodiment of the present application;

3 is a schematic structural diagram of a mode switching apparatus provided by an embodiment of the present application;

4 is a schematic structural diagram of an air conditioning system provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application;

6 is a schematic structural diagram of an air-conditioning system provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an air conditioning system provided by an embodiment of the present application;

8 is a schematic structural diagram of an air conditioning system provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application;

10 is a schematic structural diagram of an air conditioning system provided by an embodiment of the application;

11 is a schematic structural diagram of an air conditioning system provided by an embodiment of the application;

12 is a schematic structural diagram of an air conditioning system provided by an embodiment of the application;

13 is a schematic structural diagram of a vehicle according to an embodiment of the application;

FIG. 14 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application.

Detailed ways

Please refer to FIG. 1 , which shows a schematic structural diagram of an air conditioning system in the related art. As shown in FIG. 1 , the current air conditioning system generally includes: a compressor 10 , an external heat exchanger 11 , an internal heat exchanger 12 , an expansion valve 13 , a reversing valve 14 and an air conditioning controller (not shown in FIG. 1 ). The compressor 10 communicates with the external heat exchanger 11 and the internal heat exchanger 12 respectively, and the expansion valve 13 communicates with the external heat exchanger 11 and the internal heat exchanger 12 respectively. Among them, the compressor 10 is used for compressing the refrigerant. After the external heat exchanger 11 is communicated with the internal heat exchanger 12, it is used for heating or cooling the passenger compartment of the vehicle. However, the current air conditioning system has a relatively single function, for example, it can only adjust the temperature of one target, and it usually includes two working modes, namely, a cooling mode and a heating mode. For example, when the air conditioning system shown in FIG. 1 is an in-vehicle air conditioning system, it can only adjust the temperature of the passenger compartment of the vehicle.

The air-conditioning system provided in the embodiments of the present application can perform at least four working modes, thereby enriching the functions of the air-conditioning system. The at least four working modes can perform temperature adjustment for multiple targets, and there is no need to equip each target with an air-conditioning system, reducing the need for Occupy space and save the manufacturing cost of the air conditioning system.

For the convenience of readers' understanding, the embodiments of the present application explain the working principles of some devices and air conditioning systems involved below as follows:

Heat exchanger (heat exchanger): refers to the equipment that transfers the heat of the hot fluid to the cold fluid, also known as a heat exchanger. The heat exchanger can be implemented in many ways. In one example, the heat exchanger can be an evaporator, and the low-temperature condensed liquid can pass through the evaporator to exchange heat with the cooled medium, so that the low-temperature condensed liquid can be vaporized. and absorb the heat of the medium to be cooled, so that the temperature of the medium to be cooled is lowered to achieve the purpose of refrigeration; in another example, the heat exchanger can be a condenser, and the high-temperature gas can pass through the condenser, and the The heated medium performs heat exchange, so that the high temperature gas is condensed and heat is released, so that the temperature of the heated medium is increased to achieve the purpose of heating; in another example, the heat exchanger may have an evaporation state and There are two states of condensation. When the heat exchanger is in the evaporation state, it is equivalent to an evaporator. When the heat exchanger is in the condensation state, it is equivalent to a condenser. The exchange between the evaporation state and the condensation state The working principle of the heater can refer to the aforementioned evaporator and condenser, respectively. For example, the above-mentioned medium to be cooled and medium to be heated may be the medium passing through the interior of the heat exchanger, or may be the medium flowing around the heat exchanger.

The working principle of the air conditioning system is as follows:

The low-pressure and low-temperature liquid refrigerant absorbs heat into the high-temperature and low-pressure refrigerant gas through the evaporator, and then the high-temperature and low-pressure refrigerant gas is compressed into a high-temperature and high-pressure refrigerant gas under the action of a compression device (such as a compressor). The refrigerant gas is cooled and condensed into a low temperature and high pressure refrigerant liquid in the condenser and releases heat. The low temperature and high pressure refrigerant liquid passes through the throttling device and becomes a low temperature and low pressure refrigerant liquid and flows into the evaporator to form a refrigerant cycle.

For example, when the air-conditioning system performs cooling, the low-pressure and low-temperature liquid refrigerant passes through the evaporator, can exchange heat with the air around the evaporator, and absorb the air around the evaporator, so that the temperature of the air around the evaporator is lowered. , to achieve the purpose of refrigeration, the vaporized low-pressure and low-temperature liquid refrigerant becomes a high-temperature and low-pressure refrigerant gas, and then the high-temperature and low-pressure refrigerant gas is compressed into a high-temperature and high-pressure refrigerant gas under the action of a compression device (such as a compressor), The high temperature and high pressure refrigerant gas is cooled and condensed into a low temperature and high pressure refrigerant liquid in the condenser and releases heat. The low temperature and high pressure refrigerant liquid passes through the throttling device and becomes a low temperature and low pressure refrigerant liquid, and then flows into the evaporator to form a refrigerant cycle. .

When the air-conditioning system is heating, the low-pressure and low-temperature liquid refrigerant absorbs heat through the evaporator and becomes a high-temperature and low-pressure refrigerant gas, and then the high-temperature and low-pressure refrigerant gas is compressed into a high-temperature and high-pressure refrigerant gas under the action of a compression device (such as a compressor). Refrigerant gas, the high-temperature and high-pressure refrigerant gas passes through the condenser and can exchange heat with the air around the condenser, so that the high-temperature and high-pressure refrigerant gas condenses and releases heat, making the temperature of the air around the condenser The high temperature and high pressure refrigerant gas after condensation becomes low temperature and high pressure refrigerant liquid. Form a refrigerant cycle.

Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of an air-conditioning system provided by an embodiment of the present application. The air-conditioning system 20 includes: a liquid accumulator 201, a mode switching device 202, three heat exchangers, and a controller (in FIG. 2). not shown). Among them, the accumulator 201 is used for storing refrigerant.

The three heat exchangers are the first heat exchanger 203 , the second heat exchanger 204 and the third heat exchanger 205 respectively. The first heat exchanger 203 may include a first refrigerant passage having two fluid ports, a first fluid port and a second fluid port, respectively. The second heat exchanger 204 may include a second refrigerant passage having two fluid ports, a third fluid port and a fourth fluid port, respectively. The third heat exchanger 205 may include a third refrigerant passage having two fluid ports, a fifth fluid port and a sixth fluid port, respectively. The controller may be an electronic control unit (Electronic Control Unit, ECU) or a central processing unit (Central Processing Unit, CPU).

The mode switching device 202 is a set of multiple devices for performing mode switching, the multiple devices are directly or indirectly connected, and the mode switching device is also referred to as a mode switching assembly. The mode switching device has at least five fluid ports. The at least five fluid ports include a first port a, a second port b, a third port c, a fourth port d, and a fifth port e. The first fluid port of the first heat exchanger 203, the third fluid port of the second heat exchanger 204, and the fifth fluid port of the third heat exchanger 205 are in communication (the connection is at the dotted frame in FIG. In the example, communication refers to direct or indirect communication, and FIG. 2 takes direct communication as an example to draw), the second fluid port of the first heat exchanger 203 is communicated with the first port a, and the fourth fluid port of the second heat exchanger 204 The fluid port communicates with the second port b, the sixth fluid port of the third heat exchanger 205 communicates with the third port c, one fluid port of the accumulator 201 communicates with the fourth port d, and the other fluid of the accumulator 201 The port communicates with the fifth port e.

The controller is used to send a first instruction to the mode switching device 202 to control the communication between the first port a and the fifth port e in the mode switching device 202, and the communication between the third port c and the fourth port d, so that the compressed refrigerant is sequentially A refrigerant cycle is formed through the third refrigerant passage of the third heat exchanger 205 , the accumulator 201 and the first refrigerant passage of the first heat exchanger 203 . Exemplarily, the first instruction is used to instruct the first target (also referred to as the object) to be refrigerated individually, and the refrigerant cycle is used to refrigerate the first target individually.

The controller is further configured to send a second instruction to the mode switching device 202 to control the fifth port e of the mode switching device 202 to communicate with the first port a and the second port b respectively, and the third port c and the fourth port d to communicate with each other, so as to After the compressed refrigerant passes through the third refrigerant passage of the third heat exchanger 205 and the accumulator 201, it passes through the first refrigerant passage of the first heat exchanger 203 and the second passage of the second heat exchanger 204 respectively. The refrigerant passage forms the refrigerant circulation. Exemplarily, the second instruction is used for instructing simultaneous cooling of the first target and the second target, and the refrigerant cycle is used for cooling the first target and the second target simultaneously.

The controller is further configured to send a third instruction to the mode switching device 202 to make the second port b and the fifth port e of the mode switching device 202 communicate with each other, and the third port c and the fourth port d to communicate with each other, so as to make the compressed refrigerant communicate with each other. A refrigerant cycle is formed by sequentially passing through the third refrigerant passage of the third heat exchanger 205 , the liquid accumulator 201 and the second refrigerant passage of the second heat exchanger 204 . Exemplarily, the third instruction is used to instruct separate cooling of the second target, and the refrigerant cycle is used for separate cooling of the second target.

The controller is further configured to send a fourth instruction to the mode switching device 202 to control the third port c and the fifth port e of the mode switching device 202 to communicate, and the second port b and the fourth port d to communicate, so that the compressed refrigerant A refrigerant cycle is formed by sequentially passing through the second refrigerant passage of the second heat exchanger 204 , the liquid accumulator 201 and the third refrigerant passage of the third heat exchanger 205 . Exemplarily, the fourth instruction is used to instruct to heat the second target individually, and the refrigerant cycle is used to heat the second target individually.

The air conditioning system provided by the implementation of the present application can be applied to various environments. In these environments, the first target and the second target may be a device or an enclosed space, eg, the first target is a device and the second target is an enclosed space. The first target is a device requiring cooling, and the second target is a device or enclosed space requiring temperature regulation, which in some cases requires cooling and in other cases heating. It can generally be applied in vehicles, and the aforementioned first target and second target are respectively two devices in the vehicle that need to be temperature-regulated. For example, the vehicle may be an aircraft with a passenger compartment and a power supply battery, then correspondingly, the first target is the power supply battery, and the second target is the passenger compartment. There are four working modes of cooling the passenger compartment and the power supply battery at the same time, as well as heating the passenger compartment. Or, if the vehicle is a vehicle with a passenger compartment and a battery pack, the first target is the battery pack, and the second target is the passenger compartment, and the air conditioning system can be implemented for the passenger compartment refrigeration, the battery pack refrigeration, and the passenger compartment and the battery. There are four working modes of cooling the package at the same time and heating the passenger compartment. It is worth noting that when adjusting the temperature of the passenger compartment, the actual temperature adjustment target is the space inside the passenger compartment.

Please refer to the working principle of the aforementioned air-conditioning system. In the embodiment of the present application, when the air-conditioning system executes the first command, the first heat exchanger 203 communicates with the third heat exchanger 205, and the first heat exchanger 203 and the third heat exchanger communicate with each other. The heat exchanger 205 is in the evaporator state and the condenser state respectively, wherein the heat exchanger in the evaporator state (for example, the first heat exchanger) is the first target for independent refrigeration; when the air conditioning system executes the second command or the fourth command, the first The second heat exchanger 204 is in communication with the third heat exchanger 205, then the second heat exchanger 204 and the third heat exchanger 205 are in the evaporator state and the condenser state respectively, wherein, when the second instruction is executed, in the evaporator state The heat exchanger (such as the second heat exchanger) in the state is the second target cooling, and when the fourth command is executed, the heat exchanger (such as the second heat exchanger) in the condenser state is the second target heating; air conditioning When the system executes the third command, the third heat exchanger 205 communicates with the first heat exchanger 203 and the second heat exchanger 204 respectively, then among the three heat exchangers, one heat exchanger is in the condenser state, and two heat exchangers are in the condenser state. The heat exchanger is in the evaporator state, and the two heat exchangers are respectively the first target and the second target cooling (for example, the first heat exchanger is the first target cooling, and the second heat exchanger is the second target cooling). Since the heat exchanger can be realized in many ways, the heat exchanger can realize the functions of the evaporator and the condenser under different conditions. Each of the three heat exchangers may be a parallel flow heat exchanger, a plate heat exchanger (also known as a water cooler), a casing heat exchanger, a shell and tube heat exchanger, or the like. When the embodiments of the present application are actually implemented, in one case, the function of each heat exchanger in the above three heat exchangers is realized by one evaporator and one heat exchanger, that is, each heat exchanger may include An evaporator and a condenser, so that when the air conditioning system is in different working modes, the evaporator and the condenser work respectively to realize the cooling or heating function of the air conditioning system; in another case, the first heat exchanger is an evaporation The second heat exchanger and the third heat exchanger all have an evaporating state and a condensing state, wherein the second heat exchanger and the third heat exchanger can be in different states under different circumstances, and the state switching process can refer to the aforementioned process. .

It should also be noted that when the first fluid port of the first heat exchanger 203, the third fluid port of the second heat exchanger 204 and the fifth fluid port of the third heat exchanger 205 are in indirect communication, that is, It is possible to set other devices within the dashed box F in FIG. 2, through which the first fluid port of the first heat exchanger 203, the third fluid port of the second heat exchanger 204 and the third heat exchanger 205 can be connected The fifth fluid port is connected. Illustratively, the other devices may be a compression device and a reversing valve, a first fluid port of the first heat exchanger 203 , a third fluid port of the second heat exchanger 204 and a fifth fluid port of the third heat exchanger 205 Indirect communication through the compression device and the reversing valve. The embodiments of the present application do not limit the quantity, structure, and function of the other devices, as long as it is ensured that the mode switching device of the air conditioning system can execute the foregoing four kinds of commands.

In practical applications of the embodiments of the present application, each of the above three heat exchangers generally further includes a medium channel, and the medium channel is a channel for other media to pass through, and the other medium is usually a medium other than refrigerant . For example, the other medium can be air or cooling water. The medium channel can be a closed channel, for example it is a pipe with two ports, or it can be an open channel, for example it is a slit or plane arranged outside the refrigerant channel for supplying Air or cooling water passes through. The form of the medium channel is not limited in the embodiment of the present application, as long as the medium channel can pass the medium for heat exchange with the refrigerant in the refrigerant channel.

In the embodiment of the present application, the air-conditioning system can execute the four kinds of instructions generated by the above-mentioned controller, and correspondingly, the air-conditioning system has four working modes. When the air-conditioning system executes the above-mentioned first command, the air-conditioning system is in the first target individual cooling working mode; when the air-conditioning system executes the above-mentioned second command, the air-conditioning system is in the first target and second target simultaneous cooling working mode; when the air-conditioning system executes When the above-mentioned third instruction is executed, the air-conditioning system is in the second target individual cooling operation mode; when the air-conditioning system executes the above-mentioned fourth instruction, the air-conditioning system is in the second target heating operation mode.

To sum up, in the air conditioning system provided by the embodiments of the present application, since the air conditioning system can implement four working modes, the functions of the air conditioning system are enriched. Further, the at least four temperature adjustment modes can perform temperature adjustment for multiple objects (such as spaces or devices), without having to equip each object with an air conditioning system, reducing the occupation of space and saving the manufacturing cost of the air conditioning system.

Optionally, as shown in FIG. 3 , it shows a schematic structural diagram of a mode switching apparatus provided by an embodiment of the present application. The mode switching device 202 includes: a first valve 2021 , a second valve 2022 , a third valve 2023 , a fourth valve 2024 and a fifth valve 2025 . Wherein, one end of the first valve 2021, one end of the second valve 2022 and one end of the third valve 2023 are all communicated with the fifth port e, the other end of the first valve 2021 is communicated with the first port a, and the other end of the second valve 2022 One end is communicated with the second port b, the other end of the third valve 2023 is communicated with the third port c, one end of the fourth valve 2024 and one end of the fifth valve 2025 are communicated with the fourth port d, and the other end of the fourth valve 2024 In communication with the third port c, the other end of the fifth valve 2025 is in communication with the second port b. For example, the first valve 2021 , the second valve 2022 , the third valve 2023 , the fourth valve 2024 and the fifth valve 2025 may be switch valves, and the switch valves only have two switch states of on and off.

After the mode switching device 202 receives the first command, the first valve 2021 and the fourth valve 2024 are opened, and the second valve 2022, the third valve 2023 and the fifth valve 2025 are closed. Then, the first port a and the fifth port e of the mode switching device 202 communicate with each other, and the third port c and the fourth port d communicate with each other.

After the mode switching device 202 receives the second command, the first valve 2021 , the second valve 2022 and the fourth valve 2024 are opened, and the third valve 2023 and the fifth valve 2025 are closed. Then, the first port a of the mode switching device 202 communicates with the fifth port e, the second port b communicates with the fifth port e, and the third port c communicates with the fourth port d.

After the mode switching device 202 receives the second command, the second valve 2022 and the fourth valve 2024 are opened, and the first valve 2021 , the third valve 2023 and the fifth valve 2025 are closed. Then, the second port b and the fifth port e of the mode switching device 202 communicate with each other, and the third port c and the fourth port d communicate with each other.

After the mode switching device 202 receives the second command, the third valve 2023 and the fifth valve 2025 are opened, and the first valve 2021 , the second valve 2022 and the fourth valve 2024 are closed. Then, the third port c and the fifth port e of the mode switching device 202 communicate with each other, and the second port b and the fourth port d communicate with each other.

In this air-conditioning system, the actions indicated by the four received commands can be executed respectively by controlling the switch states of each valve in the mode switching device, so that the air-conditioning system can be in different working modes, which satisfies the work of the air-conditioning system. The mode switching requirement simplifies the switching mode of the working mode of the air conditioning system and reduces the structural complexity of the air conditioning system.

In the embodiment of the present application, the mode switching device may be an integral structure made of the five valves, that is, the ports of the five valves are respectively directly connected, and additional connection pipes may not be used for connection. Since the mode switching device is integrated by five valves, the mode switching device can be regarded as a five-way valve. In this way, the integration of the mode switching device is high, the volume of the air conditioning system is reduced, and the space occupation is reduced.

Optionally, as shown in FIG. 4 , the air conditioning system 20 further includes: a compressing device 206, the compressing device 206 is used for compressing the refrigerant to provide the air conditioning system with high-pressure refrigerant gas, so as to provide power for the circulation of the refrigerant, for example, The compression device 206 is in communication with the first fluid port of the first heat exchanger 203, the third fluid port of the second heat exchanger 204 and the fifth fluid port of the third heat exchanger 205, respectively. For example, the compression device 206 may be a compressor. Since the compression device 206 can control the pressure of the output refrigerant gas, the compression device 206 can cooperate with the accumulator 201 to change the quality of the refrigerant in the air conditioning system. When the pressure of the refrigerant gas output from the compression device 206 is relatively high (for example, greater than the preset first pressure threshold), when the refrigerant with relatively high pressure flows through the accumulator 201, the refrigerant output from the accumulator 201 will be refrigerated. On the contrary, when the pressure of the refrigerant gas output from the compression device 206 is relatively small (for example, less than a preset second pressure threshold, the second pressure threshold may be less than or equal to the aforementioned first pressure threshold), When the refrigerant with lower pressure flows through the accumulator 201, the quality of the refrigerant output from the accumulator 201 is smaller.

Further, the compression device 206 has a suction pipe and an exhaust pipe. If the mass of the refrigerant required by the air-conditioning system to refrigerate the first target is larger, the mass of the refrigerant flowing through the first heat exchanger 203 to the compression device 206 is larger, which will lead to the pressure of the refrigerant flowing into the compression device 206 However, the pressure at the suction pipe of the compression device 206 should not be too large. Therefore, it is necessary to control the flow of the refrigerant at the suction pipe. Optionally, as shown in FIG. 4 , the air conditioning system 20 further includes: a flow control valve 207 for performing flow control to adjust the pressure at the suction pipe of the compression device, the flow control valve 207 is respectively connected with the first heat exchanger 203 The first fluid port is communicated with the suction pipe of the compression device 206 , and the flow of the refrigerant entering the compression device 207 is controlled by controlling the opening of the flow control valve 207 . For example, the flow control valve 207 may be a solenoid valve. In practical applications of the embodiments of the present application, a temperature sensor is usually provided at the outlet of the first heat exchanger 203, and the temperature sensor is used to detect the temperature of the refrigerant at the outlet, and the opening of the flow control valve 207 can be determined according to the temperature sensor. The size of the detected temperature at the outlet is adjusted. For example, when the temperature at the outlet detected by the temperature sensor is greater than a specified temperature threshold, the opening of the flow control valve 207 may be reduced, thereby reducing the flow of refrigerant entering the compression device 206 .

Taking the air-conditioning system as an example of a vehicle-mounted air-conditioning system including a passenger compartment and a battery pack, the heat generated by the battery pack during operation is usually higher than that of the passenger compartment. In particular, the battery pack generates heat during charging. The heat is usually 3 to 5 times the heat generated by the passenger compartment, so the air conditioning system needs to adjust the temperature in a large range. The quality of the required refrigerant is quite different, and since the quality of the refrigerant required for cooling and heating the passenger compartment is also different, the air conditioning system requires the liquid accumulator 201 to adjust the The quality of the refrigerant in the air conditioning system to meet different work demands. Since the mass of the refrigerant required by the air conditioning system to cool the battery pack is relatively large, the mass of the refrigerant flowing through the first heat exchanger 203 to the compression device 206 is relatively large, which may lead to a higher pressure of the refrigerant flowing into the compression device 206 . When the air-conditioning system is working normally, the pressure at the suction pipe of the compression device 206 should not be too large. Therefore, the flow control valve 207 is required to control the flow of the refrigerant at the suction pipe to adjust the suction pipe of the compression device. The pressure at the place to achieve the effective work of the air conditioning system.

It should be noted that the aforementioned compression device can also be arranged at other positions in the air-conditioning system, as long as it can provide power for the circulation of the refrigerant. The communication of the port and the fifth fluid port is described as an example.

When the air-conditioning system 20 heats or cools the second target, the directions of the refrigerant flowing through the second heat exchanger 204 and the third heat exchanger 205 are opposite, that is, the circulation path of the refrigerant cycle is reversed (ie, the refrigerant circulation is reversed). The flow direction is opposite), optionally, please continue to refer to FIG. 4 , the air conditioning system 20 further includes: a four-way reversing valve 208 to realize the effective reversal of the flow path of the refrigerant of the air conditioning system in different modes. In FIG. 4 , the four-way reversing valve 208 has four nozzles, the four nozzles are the first nozzle f, the second nozzle g, the third nozzle h and the fourth nozzle i, the first nozzle f is in communication with the suction pipe of the compression device 206, the second nozzle g is in communication with the exhaust pipe of the compression device 206, the third nozzle h is in communication with the third fluid port of the second heat exchanger 204, and the fourth nozzle i In communication with the fifth fluid port of the third heat exchanger 205 .

The controller is also used to send the first command, the second command or the third command to the four-way reversing valve, so as to control the communication between the second nozzle g and the fourth nozzle i of the four-way reversing valve 208, and the first nozzle f and the third orifice h are communicated, and the conduction direction of the second orifice g and the fourth orifice i after the communication is from the second orifice g to the fourth orifice i, and the first orifice f and the The conduction direction of the third nozzle h is from the third nozzle h to the first nozzle f. In this way, the refrigerant flowing out of the second heat exchanger 204 can be made to flow through the third nozzle h of the four-way reversing valve 208 to the first nozzle f in sequence, so as to flow to the compression device 206 , and after passing through the compression device 206, through the The second orifice g of the four-way reversing valve 208 flows to the fourth orifice i to flow to the third heat exchanger 205 .

The controller is further configured to send a fourth command to the four-way reversing valve, to control the communication between the second orifice g of the four-way reversing valve 208 and the third orifice h, and the communication between the first orifice f and the fourth orifice i , the conduction direction of the second orifice g and the third orifice h after the communication is from the second orifice g to the third orifice h, and the conduction of the first orifice f and the fourth orifice i after the communication The direction is from the fourth nozzle i to the first nozzle f. In this way, the refrigerant flowing out of the third heat exchanger 205 flows through the fourth nozzle i of the four-way reversing valve 208 to the first nozzle f in sequence, so as to flow to the compression device 206, and after passing through the compression device 206, it passes through the four-way valve. The second orifice g of the reversing valve 208 flows to the third orifice h to flow to the second heat exchanger 204 .

In the embodiment of the present application, the air-conditioning system may also use other types of valves to realize the reversal of the flow path in different modes. For example, the inversion of the flow path in different modes can be controlled by the aforementioned mode switching device, and the aforementioned mode switching device is equivalent to a five-way reversing valve, which is not limited in the embodiment of the present application. Alternatively, in the air conditioning system, different communication pipes may also be set for the circulation paths in different modes, so that when the second target is heated and the second target is cooled, the circulation paths are reversed, although this causes the circulation paths of the air conditioning system A portion of the refrigerant is stagnant (or redundant) in some pipes, but does not affect the operation of the air conditioning system.

Optionally, as shown in FIG. 5 , the air conditioning system 20 further includes: a first throttling device 209 , the first throttling device 209 is disposed between the accumulator 201 and the mode switching device 202 , and the first throttling device 209 is Configured to control the flow of refrigerant into the three heat exchangers. In practical applications, the first throttling device 209 usually has a temperature sensor and/or a pressure sensor connected to it. The temperature of the refrigerant flowing out from the evaporator) (that is, the outlet temperature of the evaporator), the pressure sensor is used to detect the temperature of the refrigerant from the evaporator (the second heat exchanger or the third heat exchanger is in the evaporation state, which is equivalent to evaporation The pressure of the refrigerant after flowing out of the evaporator (that is, the outlet pressure of the evaporator). Wherein, the flow rate of the refrigerant at the outlet of the first throttling device 209 is proportional to the outlet temperature of the evaporator, and/or the flow rate of the refrigerant at the outlet of the first throttling device 209 is proportional to the outlet pressure of the evaporator, Then, the flow rate of the refrigerant at the outlet of the first throttling device 209 can be controlled according to the temperature and/or pressure detected by the temperature sensor. When the outlet temperature of the evaporator is high, the outlet pressure of the evaporator is high, indicating that the quality of the refrigerant entering the evaporator is insufficient. At this time, the first throttling device 209 controls the flow of the refrigerant at the outlet to increase, Make more refrigerant enter the evaporator through the circulation; when the outlet temperature of the evaporator is low, the outlet pressure of the evaporator is small, indicating that the quality of the refrigerant entering the evaporator is too much, at this time, the first throttling Device 209 controls the flow of refrigerant at its outlet to decrease.

Further, because under normal circumstances, the refrigerant flowing into the first throttling device 209 is a low-temperature and high-pressure refrigerant that flows through the condenser, and is throttled by the first throttling device 209 to become a low-temperature and low-pressure refrigerant (that is, the first throttling device 209). The throttling device is used to reduce the pressure of the refrigerant flowing into the first throttling device, and output the refrigerant with the reduced pressure), and then flow into the evaporator, and the accumulator 201 is usually set on the high-pressure side (air conditioning system , the side with higher refrigerant pressure), therefore, the first throttling device 209 is usually arranged between the accumulator 201 and the evaporator, and the first throttling device 209 may be disposed on the other side of the accumulator 201 Between a fluid port and the fifth port e of the mode switching device 202, in this way, it is ensured that no matter which mode the air conditioning system is in, the accumulator 201 is on the high pressure side, so that the air conditioning system only needs to use one accumulator 201 That is, the complexity of the air conditioning system is reduced, the volume is reduced, and the space is saved.

Further, as shown in FIG. 6 , the air conditioning system 20 further includes: an on-off valve 210 and a second throttle device 211 , the on-off valve 210 and the second throttle device 211 are connected in series, and the second throttle device 211 and the on-off valve are connected in series 210 is provided between the other fluid port of the accumulator 201 and the fifth port e of the mode switching device 202 , and is connected in parallel with the first throttling device 209 . The controller is further configured to control the switch valve to open after the first instruction is generated, and the switch valve may be opened before the mode switching device executes the first instruction or when the first instruction is executed. When the mass of the refrigerant in the air conditioning system needs to be increased, the on-off valve 210 is opened, so that the second throttling device 211 works. The working process of the second throttling device 211 is the same as the working process of the above-mentioned first throttling device 209 , which is not repeated in this embodiment of the present application. For example, both the first throttling device 209 and the second throttling device 211 may be expansion valves, such as electronic expansion valves.

In this way, since the flow path of the refrigerant at the outlet of the accumulator 201 is increased, the refrigerant can flow into the heat exchanger through the first throttling device 209 and the second throttling device 211 at the same time, thereby increasing the refrigeration in the heat exchanger. The quality of the agent is improved, so that the first target can be quickly refrigerated, and the cooling efficiency of the first target is improved.

As mentioned above, the heat generated by the battery pack during the charging process is usually 3 to 5 times that of the passenger compartment, so the air conditioning system needs to adjust the temperature in a larger range. When the battery pack needs to be quickly cooled When the on/off valve 210 is opened, the flow path of the refrigerant can be increased, the cooling of the battery pack can be realized in a short time, and the cooling efficiency can be improved.

Optionally, as shown in FIG. 7 , the air conditioning system 20 further includes: a fan 212 , and the fan 212 is located on one side of the second heat exchanger 204 and/or the third heat exchanger 205 . In practical applications of the embodiments of the present application, fans 212 are provided on one side of the second heat exchanger 204 and one side of the third heat exchanger 205 , and the number of the fans 212 may be one or more. The example does not limit this. Wherein, FIG. 9 takes as an example that only one fan is provided on one side of the second heat exchanger 204 and one side of the third heat exchanger 205, which can reduce the space occupied by the fan. For example, when the second heat exchanger 204 and/or the third heat exchanger 205 are air-cooled heat exchangers or air-cooled heat exchangers, the fan 212 may also be used for the second heat exchanger 204 and/or the air-cooled heat exchangers. The third heat exchanger 205 provides a medium (eg, air) in heat exchange with the refrigerant. The fan 212 on the side of the second heat exchanger 204 is also used to change the air flow direction of the space where the second heat exchanger 204 is located, so that the air with a higher temperature or the air with a lower temperature generated by the second heat exchanger 204 flows to the passenger compartment . The fan 212 on the side of the third heat exchanger 205 is also used to speed up the air flow rate in the space where the third heat exchanger 205 is located, so that when the third heat exchanger 205 is in a condensing state, heat dissipation is performed. In the embodiment of the present application, a plurality of fans may also be provided on one side of the second heat exchanger 204 and one side of the third heat exchanger 205, so that the air flow direction and/or the air flow rate can be adjusted effectively.

To sum up, in the air conditioning system provided by the embodiments of the present application, since the air conditioning system implements four working modes, the functions of the air conditioning system are enriched. Further, the at least four temperature adjustment modes can perform temperature adjustment for multiple objects (such as spaces or devices), without having to equip each object with an air conditioning system, reducing the occupation of space and saving the manufacturing cost of the air conditioning system. For example, the air-conditioning system may cool the first target with the refrigerant when the first heat exchanger communicates with the third heat exchanger, and cool the first target with the refrigerant when the second heat exchanger communicates with the third heat exchanger. Two-target cooling or heating, when the first heat exchanger, the second heat exchanger and the third heat exchanger are connected, the first target and the second target are simultaneously cooled by the refrigerant, which enriches the functions of the air-conditioning system, and Since the temperature of two targets can be adjusted, it is not necessary to equip each target with an air conditioning system, which reduces the occupation of space and saves the manufacturing cost of the air conditioning system.

Please refer to FIG. 8 , which shows a schematic structural diagram of an air conditioning system provided by an embodiment of the present application. As shown in FIG. 8 , the air conditioning system 20 includes: a liquid accumulator 201 , three heat exchangers, a mode switching device 202 , a compression device 206 , a four-way reversing valve 208 and a controller. Among them, the accumulator 201 is used for storing refrigerant, and the accumulator 201 has two fluid ports.

The three heat exchangers are the first heat exchanger 203, the second heat exchanger 204 and the third heat exchanger 205, respectively. The first heat exchanger 203 includes a first refrigerant passage, and the first refrigerant passage has two fluids. ports, respectively a first fluid port and a second fluid port. The second heat exchanger 204 includes a second refrigerant passage having two fluid ports, a third fluid port and a fourth fluid port, respectively. The third heat exchanger 205 includes a third refrigerant passage having two fluid ports, a fifth fluid port and a sixth fluid port, respectively.

The mode switching device 202 includes: a first valve 2021, a second valve 2022, a third valve 2023, a fourth valve 2024, and a fifth valve 2025; one end of the first valve 2021, one end of the second valve 2022 and the third valve 2023 One end is communicated with one fluid port of the reservoir 201, the other end of the first valve 2021 is communicated with the second fluid port, the other end of the second valve 2022 is communicated with the fourth fluid port, and the other end of the third valve 2023 is communicated with the second fluid port. The six fluid ports are in communication, one end of the fourth valve 2024 and one end of the fifth valve 2025 are in communication with another fluid port of the reservoir 201, the other end of the fourth valve 2024 is in communication with the sixth fluid port, and the fifth valve 2025 is in communication with the sixth fluid port. The other end communicates with the fourth fluid port. For example, the first valve 2021 , the second valve 2022 , the third valve 2023 , the fourth valve 2024 and the fifth valve 2025 may be switch valves, and the switch valves only have two switch states of on and off.

The compressing device 206 communicates with the first fluid port, the third fluid port and the fifth fluid port respectively, the compressing device 206 is used for compressing the refrigerant, and the compressing device 206 has a suction pipe and an exhaust pipe.

The four-way reversing valve 208 has four nozzles, the four nozzles are the first nozzle f, the second nozzle g, the third nozzle h and the fourth nozzle i; the first nozzle f and the compression device The suction pipe of 206 is in communication, the second nozzle g is in communication with the exhaust pipe of the compression device 206, the third nozzle h is in communication with the third fluid port, and the fourth nozzle i is in communication with the fifth fluid port.

The controller is used to send the first command to the mode switching device 202 and the four-way reversing valve 208 respectively, to control the first port a and the fifth port e in the mode switching device 202 to communicate, and the third port c to communicate with the fourth port d, And control the second orifice g of the four-way reversing valve 208 to communicate with the fourth orifice i, and the first orifice f and the third orifice h to communicate, and the second orifice g and the fourth orifice i after the communication The conduction direction is from the second nozzle g to the fourth nozzle i, and the conduction direction of the connected first nozzle f and the third nozzle h is from the third nozzle h to the first nozzle f. The first instruction is used to instruct separate cooling of the first target.

The controller is further configured to send a second command to the mode switching device 202 and the four-way reversing valve 208, respectively, to control the fifth port e of the mode switching device 202 to communicate with the first port a and the second port b, respectively, and the third port c It communicates with the fourth port d, and controls the second orifice g of the four-way reversing valve 208 to communicate with the fourth orifice i, and the first orifice f and the third orifice h to communicate, and the second orifice after the communication The conduction direction of g and the fourth nozzle i is from the second nozzle g to the fourth nozzle i, and the conduction direction of the connected first nozzle f and the third nozzle h is from the third nozzle h to the first nozzle f. The second instruction is used to instruct the simultaneous cooling of the first target and the second target.

The controller is further configured to send a third instruction to the mode switching device 202 and the four-way reversing valve 208 respectively, so that the second port b and the fifth port e of the mode switching device 202 are communicated with each other, and the third port c and the fourth port d are communicated with each other. , and control the second orifice g of the four-way reversing valve 208 to communicate with the fourth orifice i, as well as the communication between the first orifice f and the third orifice h, and the second orifice g and the fourth orifice after the communication The conduction direction of i is from the second nozzle g to the fourth nozzle i, and the conduction direction of the connected first nozzle f and the third nozzle h is from the third nozzle h to the first nozzle f . The third instruction is used to instruct separate cooling of the second target.

The controller is further configured to send a fourth command to the mode switching device 202 and the four-way reversing valve 208, respectively, to control the third port c and the fifth port e of the mode switching device 202 to communicate with each other, and the second port b and the fourth port d to communicate with each other. , and control the second orifice g of the four-way reversing valve 208 to communicate with the third orifice h, and the first orifice f to communicate with the fourth orifice i, and the second orifice g and the third orifice after the communication The conduction direction of h is from the second nozzle g to the third nozzle h, and the conduction direction of the connected first nozzle f and the fourth nozzle i is from the fourth nozzle i to the first nozzle f . The fourth instruction is used to instruct to heat the second target independently.

It should be noted that the air conditioning system 20 may include one or more of the following other structures: a flow control valve 207 controller, a first throttle device 209 , an on-off valve 210 , a second throttle device 211 and a fan 212 . For the connection methods and working principles of other structures of the air conditioning system, reference may be made to the aforementioned air conditioning system, which will not be repeated in this application.

To sum up, in the air conditioning system provided by the embodiments of the present application, since the air conditioning system implements four working modes, the functions of the air conditioning system are enriched. For example, the air conditioning system may cool the first target with the refrigerant when the first heat exchanger communicates with the third heat exchanger, and cool the second target with the refrigerant when the second heat exchanger communicates with the third heat exchanger. Target cooling or heating, when the first heat exchanger, the second heat exchanger and the third heat exchanger are connected, the first target and the second target are simultaneously cooled by the refrigerant, realizing four working modes, enriching the The function of the air conditioning system, and since two targets can be cooled at the same time, there is no need to equip each target with an air conditioning system, which reduces the occupation of space and saves the manufacturing cost of the air conditioning system.

In order to facilitate the reader's understanding, the embodiment of the present application will specifically describe the four operating modes of the aforementioned air conditioning system with reference to FIGS. 9 to 12 :

The first working mode: the first target single cooling mode:

As shown in FIG. 9 , when the air-conditioning system refrigerates the first target, the refrigerant is input into the compression device 206 from the suction pipe of the compression device 206 , and becomes a high-temperature and high-pressure refrigerant gas through the compression device 206 , and the exhaust gas of the compression device 206 The pipe flows out (that is, the compression device is used to increase the temperature and pressure of the refrigerant flowing into the compression device, and to output the refrigerant with the increased temperature and pressure), through the second valve of the four-way reversing valve 208. The nozzle g flows to the fourth nozzle i of the four-way reversing valve 208, and flows to the third heat exchanger 205. The third heat exchanger 205 is in a condensing state, condensing the high temperature and high pressure refrigerant gas into a low temperature and high pressure refrigerant liquid , and release heat at the same time (that is, the third heat exchanger 205 is used to reduce the temperature of the refrigerant flowing into the third heat exchanger 205 and output the reduced temperature), the low temperature and high pressure refrigerant liquid is composed of The third port c of the mode switching device 202 flows into the mode switching device 202, and flows out from the opened fourth valve 2024 to the accumulator 201, the switch valve 210 is opened, and after passing through the accumulator 201, it flows into the first throttling device 209, the switch The valve 210 and the second throttling device 211, the first throttling device 209 and the second throttling device 211 throttle the low-temperature and high-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant liquid (that is, the first throttling device and the second throttling device 211). The second throttling device 211 is used to reduce the pressure of the refrigerant flowing into the first throttling device, and output the reduced pressure refrigerant), the refrigerant flows into the mode switching device 202 again, and after passing through the opened first valve 2021 , flows out from the first port a of the mode switching device 202 to the first heat exchanger 203, the first heat exchanger 203 is in an evaporating state, evaporating the low-temperature and low-pressure refrigerant liquid into a high-temperature and low-pressure refrigerant gas, and at the same time absorbing heat, the The first target refrigeration (that is, the first heat exchanger 203 is used to increase the temperature of the refrigerant flowing into the first heat exchanger 203 and output the refrigerant with the increased temperature), the high temperature and low pressure refrigerant After passing through the flow control valve 207, the gas flows into the compression device 206 to form a refrigerant cycle.

The second working mode: the first target and the second target simultaneous cooling mode:

As shown in FIG. 10 , when the air-conditioning system refrigerates the first target, the refrigerant is input into the compression device 206 from the suction pipe of the compression device 206 , and becomes a high-temperature and high-pressure refrigerant gas through the compression device 206 , and the exhaust gas from the compression device 206 The pipe flows out, and flows through the four-way reversing valve 208 to the third heat exchanger 205 (the third heat exchanger 205 is in a condensing state) to become a low temperature and high pressure refrigerant liquid (that is, the third heat exchanger 205 is used to The temperature of the refrigerant in the third heat exchanger 205 is reduced, and the refrigerant with the reduced temperature is output), the low-temperature high-pressure refrigerant liquid flows into the mode switching device 202 through the third port c of the mode switching device 202, and is turned on from The fourth valve 2024 of the first throttling device 2024 flows out to the accumulator 201, and after the first throttling device 209 becomes a low-temperature and low-pressure refrigerant liquid (that is, the first throttling device is used to reduce the pressure of the refrigerant flowing into the first throttling device reduce and output the refrigerant with the reduced pressure), flow into the mode switching device 202 again, flow out from the first port a of the mode switching device 202 to the first heat exchanger 203 via the opened first valve 2021, and open the first valve 2021 respectively. The second valve 2022 flows out from the second port b of the mode switching device 202 to the second heat exchanger 204, the first heat exchanger 203 and the second heat exchanger 204 are in an evaporating state, evaporating the low-temperature and low-pressure refrigerant liquid into The high temperature and low pressure refrigerant gas absorbs heat at the same time, while the first target and the second target refrigeration respectively (that is, the first heat exchanger 203 and the second heat exchanger 204 are both used to increase the temperature of the refrigerant flowing into itself. The high temperature and low pressure refrigerant gas flowing out of the first heat exchanger 203 flows through the flow control valve 207 and then flows into the compression device 206, and the high temperature and low pressure refrigerant gas flowing out from the second heat exchanger 204 The low-pressure refrigerant gas flows through the third nozzle h of the four-way reversing valve 208 to the first nozzle f, and flows to the compression device 206 to form a refrigerant cycle.

The third working mode: the second target individual cooling mode:

As shown in FIG. 11 , when the air-conditioning system refrigerates the second target, the refrigerant flows through the compression device 206 and the four-way reversing valve 208 to the third heat exchanger 205 (the third heat exchanger 205 is in a condensing state) to become Low temperature and high pressure refrigerant liquid (that is, the third heat exchanger 205 is used to reduce the temperature of the refrigerant flowing into the third heat exchanger 205, and output the refrigerant with the reduced temperature), the low temperature and high pressure refrigerant liquid The third port c of the mode switching device 202 flows into the mode switching device 202, flows out to the reservoir 201 and the first throttling device 209 through the opened fourth valve 2024, and then flows into the mode switching device 202 again, through the opened second valve 2024. The valve 2022 flows out to the second heat exchanger 204 (the second heat exchanger 204 is in the evaporating state), and refrigerates the second target (that is, the second heat exchanger 204 is used to convert the flow into the second heat exchanger 204 ). The temperature of the refrigerant increases, and the refrigerant with the increased temperature is output), and then the refrigerant gas flows through the third nozzle h of the four-way reversing valve 208 to the first nozzle f, and flows to the compression device 206 to form Refrigerant cycle.

The fourth working mode: the second target heating mode:

As shown in FIG. 12 , when the air-conditioning system heats the second target, the refrigerant is input into the compression device 206 from the suction pipe of the compression device 206 , and becomes a high-temperature and high-pressure refrigerant gas through the compression device 206 , and is discharged from the compression device 206 . The gas pipe flows out, flows through the second nozzle g of the four-way reversing valve 208 to the third nozzle h of the four-way reversing valve 208, and flows to the second heat exchanger 204, which is in a condensing state , the high temperature and high pressure refrigerant gas is condensed into a low temperature and high pressure refrigerant liquid, and heat is released at the same time to heat the second target (that is, the second heat exchanger 204 is used to convert the refrigerant flowing into the second heat exchanger 204). The low temperature and high pressure refrigerant liquid flows into the mode switching device 202 from the second port b of the mode switching device 202, and flows out to the accumulator 201 from the opened fifth valve 2025 , after passing through the accumulator 201, it flows into the first throttling device 209, and the first throttling device 209 throttles the low-temperature and high-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant liquid (that is, the first throttling device is used to The pressure of the refrigerant in the first throttling device is reduced, and the refrigerant with the reduced pressure is output), flows into the mode switching device 202 again, passes through the opened third valve 2023, and flows from the third port c of the mode switching device 202 Flow out to the third heat exchanger 205, the third heat exchanger 205 is in an evaporating state, evaporating the low-temperature and low-pressure refrigerant liquid into a high-temperature and low-pressure refrigerant gas, and at the same time absorbing heat (that is, the third heat exchanger 205 is used to The temperature of the refrigerant flowing into the third heat exchanger 205 increases, and the refrigerant with the increased temperature is output), the high temperature and low pressure refrigerant gas flows to the first through the fourth nozzle i of the four-way reversing valve 208 After the nozzle f, it flows to the compression device 206 to form a refrigerant cycle.

It should be noted that, in FIG. 9 to FIG. 12 , bold solid lines are used to indicate the flow paths of the refrigerants, and the arrows in this implementation are used to indicate the flow directions of the refrigerants.

It is worth noting that the aforementioned high temperature and low temperature are relative concepts, that is, the temperature of the high-temperature refrigerant is greater than the temperature of the low-temperature refrigerant, and high-pressure and low-pressure are also relative concepts, that is, the temperature of the high-pressure refrigerant is greater than that of the low-pressure refrigerant. temperature.

For example, the embodiments of the present application are described by taking the application of the air conditioning system on a vehicle as an example, and the air conditioning system is a vehicle air conditioning system. Please refer to FIG. 13 , which shows a schematic structural diagram of a vehicle provided by an embodiment of the present application. As shown in FIG. 13 , an embodiment of the present application provides a vehicle 2 . The vehicle 2 includes a vehicle body 21 , a passenger compartment 22 arranged inside the vehicle body 21 , a battery pack 23 arranged on the vehicle body 21 , and an air conditioning system 20 . The system 20 may be the air conditioning system shown in the above embodiments. For example, the vehicle may be an electric vehicle. Optionally, the first target may be the battery pack 23 of the vehicle, and the second target may be the passenger compartment 22 of the vehicle. The structure of the air-conditioning system refers to the air-conditioning system shown in the aforementioned FIG. 2 to FIG. 8 . The air conditioning system 20 may include one or more of the following: a liquid accumulator 201, three heat exchangers, a mode switching device 202, a compression device 206, a flow control valve 207, a four-way reversing valve 208, a controller, a first Throttle device 209 , on-off valve 210 , second throttle device 211 and fan 212 . The three heat exchangers may include a first heat exchanger 203 , a second heat exchanger 204 and a third heat exchanger 205 . Among them, the accumulator 201, the three heat exchangers, the mode switching device 202, the compression device 206, the flow control valve 207, the four-way reversing valve 208, the controller, the first throttling device 209, the on-off valve 210, the second For the structure and connection relationship of the throttle device 211 and the fan 212, reference may be made to the structure and connection relationship of the corresponding devices in the foregoing embodiments. This is not repeated in this embodiment of the present application.

Since the battery pack of an electric vehicle will generate heat during charging and discharging, especially when the ambient temperature is high (for example, in summer), the temperature of the heat will be higher. Therefore, the air conditioning system can be used for the battery pack and the battery pack. The crew cabin is cooled.

As described above, in the air conditioning system 20, the first heat exchanger 203 includes the first refrigerant passage, the second heat exchanger 204 includes the second refrigerant passage, and the third heat exchanger 205 includes the third refrigerant passage. In the vehicle air conditioning system, the first refrigerant passage may be used for heat exchange with the battery pack of the vehicle. The second refrigerant passage may be used for heat exchange with the passenger compartment of the vehicle. The third refrigerant passage may be used for heat exchange with the exterior of the vehicle.

Further, in the vehicle, the heat exchanger may include a medium channel, and heat exchange between the refrigerant channel of the heat exchanger and the device that needs to perform heat exchange is realized by arranging the medium channel. For example, the first heat exchanger 203 further includes a first medium channel, the second heat exchanger 204 further includes a second medium channel, and the third heat exchanger 205 includes a third medium channel, and the three medium channels may be open channels or closed channel. Exemplarily, the first medium channel is a pipe; the second medium channel is an open channel, such as a slit or a plane arranged outside the second refrigerant channel; the third medium channel is an open channel, such as arranged in the third refrigerant channel A gap or flat on the outside. The form of the medium channel is not limited in the embodiment of the present application, as long as the medium channel can pass the medium for heat exchange with the refrigerant in the refrigerant channel.

Exemplarily, the first heat exchanger 203 (eg, the first medium channel) is arranged around the battery pack 23 , the second heat exchanger 204 (eg, the second medium channel) is arranged around the passenger compartment 22 , and the third heat exchanger 205 ( For example, a third medium channel) is provided around the air intake grille at the front of the vehicle body. Wherein, that a certain heat exchanger among the three heat exchangers is located around a target means that the distance between the certain heat exchanger and the target is less than a specified distance threshold. Target close placement, for example, the third heat exchanger 205 may be placed on the side of the intake grille away from the vehicle exterior (usually called the rear of the intake grille), since the closer the third heat exchanger is to the intake grille, The heat exchange effect between the third refrigerant passage and the outside of the vehicle is better, therefore, the third heat exchanger is usually close to the intake grille. Since the distance between each heat exchanger and the target requiring heat exchange is relatively close, good heat exchange can be achieved, and the length of connecting pipes can be reduced, thereby saving costs.

It should be noted that, since the above-mentioned first heat exchanger and second heat exchanger are usually arranged inside the vehicle, the third heat exchanger is closer to the outside of the vehicle than the first heat exchanger and the second heat exchanger. Therefore, the The first heat exchanger and the second heat exchanger may be referred to as an in-vehicle heat exchanger, and the third heat exchanger may be referred to as an out-of-vehicle heat exchanger.

In order to facilitate the reader's understanding, the embodiment of the present application uses the first heat exchanger including the first medium channel as an example to explain the heat exchange principle of the first heat exchanger, and the heat exchange principle of other heat exchangers can refer to the first heat exchange Heater. The battery pack 23 of the vehicle may include: a pack body and a heat dissipation pipe disposed outside the pack body, and the heat dissipation pipe accommodates a cooling liquid. The first heat exchanger 203 may be a plate heat exchanger, which is a device for heat exchange between liquid and liquid or liquid and gas, and has the advantages of high heat exchange efficiency, compact and lightweight structure, and the like. As shown in FIG. 14 , the first heat exchanger 203 includes a first medium channel L1 (the bent line in FIG. 14 represents the first medium channel), the first medium channel communicates with the heat dissipation pipe and forms a circuit of the cooling liquid. The water inlet of the first medium channel L1 can be connected to the water outlet of the heat dissipation pipe of the battery pack 23, and the water outlet of the first medium channel L1 can be connected to the water inlet of the heat dissipation pipe, so that the first medium channel L1 is connected to the battery pack The cooling pipes are connected to form a circuit through which the cooling liquid can enter the first medium channel L1, so that when the air conditioning system cools the battery pack (that is, the first heat exchanger 203 communicates with the third heat exchanger 205 At this time, the first heat exchanger 203 is equivalent to an evaporator), and the refrigerant in the first refrigerant passage L2 (the dotted line in FIG. 14 represents the first refrigerant passage) is heated with the cooling liquid in the first medium passage L1 Exchange, make the refrigerant vaporize and absorb the heat of the cooling liquid, so as to realize the cooling of the cooling liquid, so that the cooled cooling liquid absorbs the heat of the package body in the heat dissipation pipe, and realizes the cooling treatment of the package body of the battery pack.

Optionally, the air conditioning system 30 may further include: two temperature sensors, the two temperature sensors include a first temperature sensor and a second temperature sensor, the two temperature sensors are respectively connected to the controller, and the first temperature sensor is used to detect the temperature of the vehicle. The temperature of the passenger compartment, the second temperature sensor is used to detect the temperature of the battery pack.

The controller is configured to: when the temperature of the battery pack detected by the second temperature sensor reaches a third temperature threshold, send a first instruction to the mode switching device 202 , where the first cooling is used to instruct the battery pack to be individually cooled. When the temperature of the passenger compartment detected by the first temperature sensor reaches the first temperature threshold, and the temperature of the battery pack detected by the second temperature sensor reaches the third temperature threshold, a second command is sent to the mode switching device 202, and the second command uses When instructed to cool both the battery pack and the passenger compartment at the same time. When the temperature of the passenger compartment detected by the first temperature sensor reaches the second temperature threshold, a third instruction is sent to the mode switching device 202, where the third instruction is used to instruct the passenger compartment to be refrigerated separately. When the temperature of the passenger compartment detected by the first temperature sensor reaches the first temperature threshold, a fourth instruction is sent to the mode switching device 202, where the fourth instruction is used to instruct the passenger compartment to be heated independently. Wherein, the first temperature threshold is greater than the second temperature threshold.

It should be noted that the current battery pack usually includes multiple temperature sensors to detect the temperatures at different positions of the pack body. Therefore, the second temperature sensor can also be one of the multiple temperature sensors of the battery pack, so it is not necessary to separately set the first temperature sensor. Two temperature sensors, realize the multiplexing of temperature sensors, and reduce the complexity of the air conditioning system.

Referring to FIG. 14 , the air conditioning system 20 may further include: a humidity sensor 214 , the humidity sensor 214 is communicated with the controller 213 , and the humidity sensor 214 is used to detect the humidity of the passenger compartment 22 . The controller 213 is further configured to send a third instruction to the mode switching device 202 when the humidity of the passenger compartment 22 detected by the humidity sensor 214 reaches the humidity threshold, where the third instruction is used to instruct the passenger compartment to be refrigerated independently.

It should be noted that, for the implementation of the above-mentioned controller to control the communication state between the three heat exchangers, reference may be made to the above-mentioned implementation of the communication state of the mode switching device shown in FIG. 2 and FIG. Repeat.

It should also be noted that, the above-mentioned manner of controlling the mode switching device may also have other manners. For example, the state of each valve in the mode switching device can be manually controlled to switch the working mode of the air conditioning system. For example, one control button may be set for each of the multiple operating modes of the air-conditioning system, that is, four control buttons may be set, and the four control buttons are connected to the aforementioned controller, and a certain control is triggered when the driver and other vehicle operators. When the button is pressed, the controller controls the mode switching device by sending an instruction to control its on-off state with the accumulator and each of the three heat exchangers, so as to realize the switching of the working mode corresponding to the certain control button. Alternatively, a button with four gears can also be set, each gear corresponds to a working mode, the button is connected to the aforementioned controller, when the driver and other vehicle operators control the button to switch to a certain gear, the control The controller controls the mode switching device to control its on-off state with the accumulator and each of the three heat exchangers by sending a control command to switch the working mode corresponding to the certain gear.

It should also be noted that the automatic adjustment function of the air conditioning system can be triggered by the automatic control button, that is, when the automatic control button is not triggered, the control method of the mode switching device can be the aforementioned manual control method; When the control button is activated, the control mode of the mode switching device may be a mode automatically adjusted by the air conditioning system.

The embodiments of the present application will specifically describe the four operating modes of the vehicle-mounted air conditioning system with reference to FIGS. 9 to 12 :

The first working mode: battery pack cooling mode alone:

As shown in FIG. 9 , when the vehicle air conditioner refrigerates the battery pack, the refrigerant is input into the compression device 206 from the suction pipe of the compression device 206 , and becomes a high-temperature and high-pressure refrigerant gas through the compression device 206 , and the exhaust gas of the compression device 206 The pipe flows out (that is, the compression device is used to increase the temperature and pressure of the refrigerant flowing into the compression device, and to output the refrigerant with the increased temperature and pressure), through the second valve of the four-way reversing valve 208. The nozzle g flows to the fourth nozzle i of the four-way reversing valve 208, and flows to the third heat exchanger 205. The third heat exchanger 205 is in a condensing state, condensing the high temperature and high pressure refrigerant gas into a low temperature and high pressure refrigerant liquid , and release heat at the same time (that is, the third heat exchanger 205 is used to reduce the temperature of the refrigerant flowing into the third heat exchanger 205 and output the reduced temperature), the low temperature and high pressure refrigerant liquid is composed of The third port c of the mode switching device 202 flows into the mode switching device 202, and flows out from the opened fourth valve 2024 to the accumulator 201, the switch valve 210 is opened, and after passing through the accumulator 201, it flows into the first throttling device 209, the switch The valve 210 and the second throttling device 211, the first throttling device 209 and the second throttling device 211 throttle the low-temperature and high-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant liquid (that is, the first throttling device and the second throttling device 211). The second throttling device 211 is used to reduce the pressure of the refrigerant flowing into the first throttling device, and output the reduced pressure refrigerant), the refrigerant flows into the mode switching device 202 again, and after passing through the opened first valve 2021 , flows out from the first port a of the mode switching device 202 to the first heat exchanger 203, the first heat exchanger 203 is in an evaporating state, evaporating the low-temperature and low-pressure refrigerant liquid into a high-temperature and low-pressure refrigerant gas, and at the same time absorbing heat, the The battery pack is cooled (that is, the first heat exchanger 203 is used to increase the temperature of the refrigerant flowing into the first heat exchanger 203 and output the increased temperature), the high temperature and low pressure refrigerant gas After passing through the flow control valve 207, it flows into the compression device 206 to form a refrigerant cycle.

The second working mode: the simultaneous cooling mode of the battery pack and the passenger compartment:

As shown in FIG. 10 , when the vehicle air conditioner refrigerates the battery pack, the refrigerant is input into the compression device 206 from the suction pipe of the compression device 206 , and becomes a high-temperature and high-pressure refrigerant gas through the compression device 206 , and the exhaust gas from the compression device 206 The pipe flows out, and flows through the four-way reversing valve 208 to the third heat exchanger 205 (the third heat exchanger 205 is in a condensing state) to become a low temperature and high pressure refrigerant liquid (that is, the third heat exchanger 205 is used to The temperature of the refrigerant in the third heat exchanger 205 is reduced, and the refrigerant with the reduced temperature is output), the low-temperature high-pressure refrigerant liquid flows into the mode switching device 202 through the third port c of the mode switching device 202, and is turned on from The fourth valve 2024 of the first throttling device 2024 flows out to the accumulator 201, and after the first throttling device 209 becomes a low-temperature and low-pressure refrigerant liquid (that is, the first throttling device is used to reduce the pressure of the refrigerant flowing into the first throttling device reduce and output the refrigerant with the reduced pressure), flow into the mode switching device 202 again, flow out from the first port a of the mode switching device 202 to the first heat exchanger 203 via the opened first valve 2021, and open the first valve 2021 respectively. The second valve 2022 flows out from the second port b of the mode switching device 202 to the second heat exchanger 204, the first heat exchanger 203 and the second heat exchanger 204 are in an evaporating state, evaporating the low-temperature and low-pressure refrigerant liquid into The high temperature and low pressure refrigerant gas absorbs heat at the same time, and at the same time cools the battery pack and the passenger compartment respectively (that is, both the first heat exchanger 203 and the second heat exchanger 204 are used to increase the temperature of the refrigerant flowing into itself, The high temperature and low pressure refrigerant gas flowing out of the first heat exchanger 203 flows through the flow control valve 207 and then flows into the compression device 206, and the high temperature and low pressure refrigerant gas flowing out from the second heat exchanger 204 is refrigerated The refrigerant gas flows through the third nozzle h of the four-way reversing valve 208 to the first nozzle f, and flows to the compression device 206 to form a refrigerant cycle.

The third working mode: the individual cooling mode of the passenger compartment:

As shown in FIG. 11 , when the vehicle air conditioning system cools the passenger compartment, the refrigerant flows through the compression device 206 and the four-way reversing valve 208 to the third heat exchanger 205 (the third heat exchanger 205 is in a condensing state) to become Low temperature and high pressure refrigerant liquid (that is, the third heat exchanger 205 is used to reduce the temperature of the refrigerant flowing into the third heat exchanger 205, and output the refrigerant with the reduced temperature), the low temperature and high pressure refrigerant liquid The third port c of the mode switching device 202 flows into the mode switching device 202, flows out to the reservoir 201 and the first throttling device 209 through the opened fourth valve 2024, and then flows into the mode switching device 202 again, through the opened second valve 2024. The valve 2022 flows out to the second heat exchanger 204 (the second heat exchanger 204 is in the evaporative state), and refrigerates the passenger compartment (that is, the second heat exchanger 204 is used to cool the flow into the second heat exchanger 204) The temperature of the refrigerant increases, and the refrigerant with the increased temperature is output), and then the refrigerant gas flows through the third nozzle h of the four-way reversing valve 208 to the first nozzle f, and flows to the compression device 206 to form refrigeration. agent cycle.

The fourth working mode: passenger compartment heating mode:

As shown in FIG. 12 , when the on-board air-conditioning system heats the passenger compartment, the refrigerant is input into the compression device 206 from the suction pipe of the compression device 206 , and becomes a high-temperature and high-pressure refrigerant gas through the compression device 206 , and is discharged from the compression device 206 . The gas pipe flows out, flows through the second nozzle g of the four-way reversing valve 208 to the third nozzle h of the four-way reversing valve 208, and flows to the second heat exchanger 204, which is in a condensing state , the high temperature and high pressure refrigerant gas is condensed into a low temperature and high pressure refrigerant liquid, and heat is released at the same time to heat the passenger compartment (that is, the second heat exchanger 204 is used for the temperature of the refrigerant flowing into the second heat exchanger 204 reduce the temperature, and output the refrigerant with reduced temperature), the low-temperature and high-pressure refrigerant liquid flows into the mode switching device 202 from the second port b of the mode switching device 202, and flows out to the accumulator 201 from the opened fifth valve 2025, After passing through the accumulator 201, it flows into the first throttling device 209, and the first throttling device 209 throttles the low-temperature and high-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant liquid (that is, the first throttling device is used to The pressure of the refrigerant in the first throttling device is reduced, and the refrigerant with the reduced pressure is output), flows into the mode switching device 202 again, passes through the opened third valve 2023, and flows out from the third port c of the mode switching device 202 to the third heat exchanger 205, the third heat exchanger 205 is in an evaporating state, evaporating the low temperature and low pressure refrigerant liquid into a high temperature and low pressure refrigerant gas, and at the same time absorbing heat (that is, the third heat exchanger 205 is used to The temperature of the refrigerant in the third heat exchanger 205 increases, and the refrigerant with the increased temperature is output), and the high-temperature and low-pressure refrigerant gas flows to the first pipe through the fourth nozzle i of the four-way reversing valve 208 After port f, it flows to the compression device 206 to form a refrigerant cycle.

To sum up, in the vehicle provided by the embodiments of the present application, since the air conditioning system can control the on-off state of the first heat exchanger and the third heat exchanger, and the second heat exchanger and the third heat exchanger through the mode switching device so that the air conditioning system can realize four kinds of cooling of the battery pack of the vehicle, independent cooling of the passenger compartment of the vehicle, heating of the passenger compartment of the vehicle, and simultaneous cooling of the battery pack and the passenger compartment of the vehicle. The working mode enriches the working mode of the air-conditioning system and meets the switching needs of various working modes.

Further, the at least four temperature adjustment modes can adjust the temperature of the battery pack and the passenger compartment, especially when the first heat exchanger is in communication with the third heat exchanger, the battery pack of the vehicle can be cooled by the refrigerant, so as to realize The effective cooling treatment of the battery pack ensures the normal operation of the battery pack. Then the vehicle does not need to be equipped with multiple air conditioning systems, which reduces the occupation of space and saves the manufacturing cost of the air conditioning system.

Optionally, the vehicle may further include one or more of a power conditioner, a powertrain, and an onboard charger. Among them, the power conditioner is used to adjust the power supply of the battery pack; the power transmission system is used to transmit the power to the on-board charger, and the on-board charger is used to charge the battery pack.

Further, the vehicle may further include: a vehicle controller, a front axle, a front suspension, a front wheel, a transmission, a transmission shaft, a muffler, a rear suspension, a leaf spring, a shock absorber, a rear wheel, a brake, a rear axle , one or more of a seat, a steering wheel, a steering gear and a radiator, which is not limited in this application.

In this application, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, and the term "at least one" refers to one or more, unless expressly limited otherwise. The term "and/or" in this application is only an association relationship to describe associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, independently There are three cases of B.

Claims (13)

1. An air conditioning system, characterized in that the air conditioning system comprises: the heat exchanger comprises a liquid storage device, three heat exchangers, a mode switching device and a controller;

wherein the accumulator is used for storing refrigerant, and the accumulator has two fluid ports;

the three heat exchangers are respectively a first heat exchanger, a second heat exchanger and a third heat exchanger, the first heat exchanger comprises a first refrigerant channel, and the first refrigerant channel is provided with two fluid ports which are respectively a first fluid port and a second fluid port;

the second heat exchanger includes a second refrigerant pass having two fluid ports, a third fluid port and a fourth fluid port, respectively;

the third heat exchanger includes a third refrigerant channel having two fluid ports, a fifth fluid port and a sixth fluid port, respectively;

the mode switching device has at least five fluid ports including a first port, a second port, a third port, a fourth port, and a fifth port, the first fluid port, the third fluid port, the fifth fluid port being in communication, the second fluid port being in communication with the first port, the fourth fluid port being in communication with the second port, the sixth fluid port being in communication with the third port, one fluid port of the reservoir being in communication with the fourth port, another fluid port of the reservoir being in communication with the fifth port;

the controller is configured to send a first instruction to the mode switching device, control the first port and the fifth port of the mode switching device to communicate with each other, and control the third port and the fourth port to communicate with each other, so that the compressed refrigerant sequentially passes through the third refrigerant channel, the accumulator, and the first refrigerant channel to form a refrigerant cycle;

the controller is further configured to send a second instruction to the mode switching device, control the fifth port of the mode switching device to communicate with the first port and the second port, respectively, and control the third port and the fourth port to communicate with each other, so that the compressed refrigerant passes through the first refrigerant channel and the second refrigerant channel after passing through the third refrigerant channel and the accumulator, respectively, and forms a refrigerant cycle;

the controller is further configured to send a third instruction to the mode switching device, control the second port and the fifth port of the mode switching device to communicate with each other, and control the third port and the fourth port to communicate with each other, so that the compressed refrigerant sequentially passes through the third refrigerant channel, the accumulator, and the second refrigerant channel to form a refrigerant cycle;

the controller is further configured to send a fourth instruction to the mode switching device, control the third port and the fifth port of the mode switching device to communicate with each other, and control the second port and the fourth port to communicate with each other, so that the compressed refrigerant sequentially passes through the second refrigerant channel, the accumulator, and the third refrigerant channel to form a refrigerant cycle;

the air conditioning system further includes: a compression device in communication with the first, third and fifth fluid ports, respectively, the compression device for compressing the refrigerant.

2. The air conditioning system as claimed in claim 1, wherein the mode switching means comprises: a first valve, a second valve, a third valve, a fourth valve and a fifth valve;

one end of the first valve, one end of the second valve and one end of the third valve are all communicated with the fifth port, the other end of the first valve is communicated with the first port, the other end of the second valve is communicated with the second port, the other end of the third valve is communicated with the third port, one end of the fourth valve and one end of the fifth valve are all communicated with the fourth port, the other end of the fourth valve is communicated with the third port, and the other end of the fifth valve is communicated with the second port;

after the mode switching device receives the first instruction, the first valve and the fourth valve are opened, and the second valve, the third valve and the fifth valve are closed;

after the mode switching device receives the second instruction, the first valve, the second valve and the fourth valve are opened, and the third valve and the fifth valve are closed;

after the mode switching device receives the third instruction, the second valve and the fourth valve are opened, and the first valve, the third valve and the fifth valve are closed;

after the mode switching device receives the fourth instruction, the third valve and the fifth valve are opened, and the first valve, the second valve and the fourth valve are closed.

3. The air conditioning system of claim 1, wherein the compression device has a suction duct and a discharge duct, the air conditioning system further comprising:

the four-way reversing valve is provided with four pipe orifices which are respectively a first pipe orifice, a second pipe orifice, a third pipe orifice and a fourth pipe orifice, the first pipe orifice is communicated with the air suction pipe of the compression device, the second pipe orifice is communicated with the air exhaust pipe of the compression device, the third pipe orifice is communicated with the third fluid port, and the fourth pipe orifice is communicated with the fifth fluid port;

the controller is further configured to send the first instruction, the second instruction or the third instruction to the four-way reversing valve, control the communication between the second pipe orifice and the fourth pipe orifice of the four-way reversing valve, and the communication between the first pipe orifice and the third pipe orifice, where the communication direction between the second pipe orifice and the fourth pipe orifice after the communication is from the second pipe orifice to the fourth pipe orifice, and the communication direction between the first pipe orifice and the third pipe orifice after the communication is from the third pipe orifice to the first pipe orifice;

the controller is further configured to send a fourth instruction to the mode switching device, control the communication between the second pipe orifice and the third pipe orifice of the four-way reversing valve, and the communication between the first pipe orifice and the fourth pipe orifice, where the communication direction between the second pipe orifice and the third pipe orifice is from the second pipe orifice to the third pipe orifice, and the communication direction between the first pipe orifice and the fourth pipe orifice is from the fourth pipe orifice to the first pipe orifice.

4. The air conditioning system according to any one of claims 1 to 3, characterized in that the air conditioning system further comprises: the device comprises a first throttling device, a switch valve and a second throttling device;

the first throttling device is arranged between the other fluid port and the fifth port of the liquid reservoir, the switch valve is connected with the second throttling device in series, and the second throttling device and the switch valve which are connected in series are arranged between the other fluid port and the fifth port of the liquid reservoir and are connected with the first throttling device in parallel;

the controller is further used for controlling the opening and closing valve to be opened after the first instruction is generated.

5. The air conditioning system of claim 4, wherein the first and second throttling devices are both expansion valves.

6. The air conditioning system according to any one of claims 1 to 3, characterized in that the air conditioning system further comprises:

and the fan is positioned on one side of the second heat exchanger and/or the third heat exchanger.

7. An air conditioning system, characterized in that the air conditioning system comprises: the system comprises a liquid storage device, three heat exchangers, a mode switching device, a compression device, a four-way reversing valve and a controller;

wherein the accumulator is used for storing refrigerant, and the accumulator has two fluid ports;

the three heat exchangers are respectively a first heat exchanger, a second heat exchanger and a third heat exchanger, the first heat exchanger comprises a first refrigerant channel, and the first refrigerant channel is provided with two fluid ports which are respectively a first fluid port and a second fluid port;

the second heat exchanger includes a second refrigerant pass having two fluid ports, a third fluid port and a fourth fluid port, respectively;

the third heat exchanger includes a third refrigerant channel having two fluid ports, a fifth fluid port and a sixth fluid port, respectively;

the mode switching device has at least five fluid ports including a first port, a second port, a third port, a fourth port, and a fifth port, the first fluid port, the third fluid port, the fifth fluid port being in communication, the second fluid port being in communication with the first port, the fourth fluid port being in communication with the second port, the sixth fluid port being in communication with the third port, one fluid port of the reservoir being in communication with the fourth port, another fluid port of the reservoir being in communication with the fifth port;

the mode switching device includes: a first valve, a second valve, a third valve, a fourth valve and a fifth valve; one end of the first valve, one end of the second valve, and one end of the third valve are all in communication with one fluid port of the reservoir, the other end of the first valve is in communication with the second fluid port, the other end of the second valve is in communication with the fourth fluid port, the other end of the third valve is in communication with the sixth fluid port, one end of the fourth valve and one end of the fifth valve are all in communication with the other fluid port of the reservoir, the other end of the fourth valve is in communication with the sixth fluid port, and the other end of the fifth valve is in communication with the fourth fluid port;

said compression device being in communication with said first, third and fifth fluid ports, respectively, said compression device for compressing said refrigerant, said compression device having a suction tube and a discharge tube;

the four-way reversing valve is provided with four pipe orifices which are respectively a first pipe orifice, a second pipe orifice, a third pipe orifice and a fourth pipe orifice; the first orifice is in communication with the suction duct of the compression device, the second orifice is in communication with the discharge duct of the compression device, the third orifice is in communication with the third fluid port, and the fourth orifice is in communication with the fifth fluid port;

the controller is used for respectively sending a first instruction to the mode switching device and the four-way reversing valve, controlling the first port and the fifth port in the mode switching device to be communicated, controlling the third port and the fourth port to be communicated, controlling the second pipe orifice and the fourth pipe orifice of the four-way reversing valve to be communicated, and controlling the first pipe orifice and the third pipe orifice to be communicated, wherein the communication direction of the communicated second pipe orifice and the communicated fourth pipe orifice is from the second pipe orifice to the fourth pipe orifice, and the communication direction of the communicated first pipe orifice and the communicated third pipe orifice is from the third pipe orifice to the first pipe orifice;

the controller is further configured to send a second instruction to the mode switching device and the four-way reversing valve, respectively, control the fifth port of the mode switching device to be communicated with the first port and the second port, control the third port to be communicated with the fourth port, control the second pipe orifice and the fourth pipe orifice of the four-way reversing valve to be communicated, and control the first pipe orifice and the third pipe orifice to be communicated, a communication direction of the communicated second pipe orifice and the communicated fourth pipe orifice is from the second pipe orifice to the fourth pipe orifice, and a communication direction of the communicated first pipe orifice and the communicated third pipe orifice is from the third pipe orifice to the first pipe orifice;

the controller is further configured to send a third instruction to the mode switching device and the four-way reversing valve, respectively, so that the second port of the mode switching device is communicated with the fifth port, the third port is communicated with the fourth port, and the second pipe orifice of the four-way reversing valve is controlled to be communicated with the fourth pipe orifice and the first pipe orifice is communicated with the third pipe orifice, the communicated second pipe orifice and the communicated fourth pipe orifice are communicated in a direction from the second pipe orifice to the fourth pipe orifice, and the communicated first pipe orifice and the communicated third pipe orifice are communicated in a direction from the third pipe orifice to the first pipe orifice;

the controller is further used for sending fourth instructions to the mode switching device and the four-way reversing valve respectively, controlling the mode switching device to enable the third port to be communicated with the fifth port, enable the second port to be communicated with the fourth port, and control the second pipe orifice and the third pipe orifice of the four-way reversing valve to be communicated, enable the first pipe orifice to be communicated with the fourth pipe orifice, enable the communicated second pipe orifice and the communicated third pipe orifice to be communicated from the second pipe orifice to the third pipe orifice, and enable the communicated first pipe orifice and the communicated fourth pipe orifice to be communicated from the fourth pipe orifice to the first pipe orifice.

8. A vehicle, characterized in that the vehicle comprises:

a vehicle body, a passenger compartment disposed inside the vehicle body, and a battery pack and an air conditioning system disposed on the vehicle body, the air conditioning system being the air conditioning system of any one of claims 1 to 7.

9. The vehicle of claim 8, characterized in that the first refrigerant passage is for heat exchange with a battery pack of the vehicle;

the second refrigerant passage is used for exchanging heat with a passenger compartment of the vehicle;

the third refrigerant passage is for exchanging heat with the outside of the vehicle.

10. The vehicle of claim 9,

the first heat exchanger is arranged around the battery pack, the second heat exchanger is arranged around the passenger compartment, and the third heat exchanger is arranged around an air inlet grid at the head of the vehicle body.

11. The vehicle according to claim 9 or 10, characterized in that the battery pack includes: the bag comprises a bag body and a heat dissipation pipeline arranged outside the bag body, wherein cooling liquid is contained in the heat dissipation pipeline;

the first heat exchanger further comprises a first medium channel which is communicated with the heat dissipation pipeline and forms a loop of the cooling liquid.

12. The vehicle according to claim 9 or 10, characterized in that the air conditioning system further comprises:

the two temperature sensors comprise a first temperature sensor and a second temperature sensor, the two temperature sensors are respectively connected with the controller, the first temperature sensor is used for detecting the temperature of a passenger compartment of the vehicle, and the second temperature sensor is used for detecting the temperature of the battery pack;

the controller is configured to:

when the temperature of the battery pack detected by the second temperature sensor reaches a third temperature threshold value, sending the first instruction to the mode switching device;

when the temperature of the passenger compartment detected by the first temperature sensor reaches a first temperature threshold value and the temperature of the battery pack detected by the second temperature sensor reaches a third temperature threshold value, sending the second instruction to the mode switching device;

when the temperature of the passenger compartment detected by the first temperature sensor reaches a second temperature threshold, sending the third instruction to the mode switching device;

sending the fourth instruction to the mode switching device when the temperature of the passenger compartment detected by the first temperature sensor reaches a first temperature threshold;

wherein the first temperature threshold is greater than the second temperature threshold.

13. The vehicle according to claim 9 or 10, characterized in that the air conditioning system further comprises:

a humidity sensor in communication with the controller, the humidity sensor for detecting a humidity of the passenger compartment;

the controller is further configured to send the third instruction to the mode switching device when the humidity of the passenger compartment detected by the humidity sensor reaches a humidity threshold.

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