CN107839430B - Automobile air conditioning system - Google Patents

Abstract

The present invention relates to an automobile air conditioning system, characterized in that: a first air circulation shell is used to guide air flow; an evaporator is arranged in the first air circulation shell, and the air flow in the first air circulation shell all flows through the evaporator; a first blower is arranged in the first air circulation shell, and is used to generate air flow; a first flow outlet guides the air flow in the first air circulation shell to the outside of the shell; the air conditioning system is provided with a minimum number of valves in the refrigerant circuit, and an air guide device is provided in the air circulation shell, and the switching between the system cooling/dehumidification working mode and the heating working mode is realized through the joint action of the valve and the air guide device. The system volume is reduced while the system cooling/heating efficiency is improved, that is, it is achieved with a minimum number of parts, and the volume is small and the efficiency is high.

Description

Automobile air conditioning system

Technical Field

The invention relates to an automobile air conditioning system, which is a cooling and heating integrated air conditioning system for automobiles.

Background technique

At present, with the continuous upgrading of automobile emission regulations, automobiles are gradually becoming smaller in displacement and further developing towards new energy forms such as hybrid vehicles and pure electric vehicles. However, this brings about technical difficulties in automobile air conditioning: the engines of small-displacement vehicles have less waste heat available in winter, hybrid vehicles have no heat source when driving purely electric, and pure electric vehicles have no heat source. The above situation makes it impossible to meet the vehicle's winter heating and defrosting/defogging needs, reducing driving comfort and even affecting driving safety. There are two known solutions, PTC heaters and heat pump air conditioning systems. PTC heaters are simple and reliable, but the problems of low efficiency and high energy consumption are prominent. Heat pump air conditioning systems are gradually being valued by people due to their high energy efficiency ratio.

The existing heat pump air conditioning technology is provided with a refrigerant circuit including a compressor, an evaporator and a condenser, and an air circulation housing including a blower for circulating air, and an air guide device in the housing for controlling the air flow direction. The above heat pump air conditioning system has both a cooling/dehumidification working mode and a heating working mode. The switching of the working mode is achieved by a number of valves provided in the refrigerant circuit or a number of air guide devices provided in the above housing.

In patent document CN103342094B, a pure electric vehicle heat pump air conditioning system is disclosed, including a compressor, a four-way reversing valve, an external heat exchanger, an internal heat exchanger, an internal heater, an oil-liquid separator, a first one-way channel, a second one-way channel and an internal air duct mechanism. Among them: the first port of the internal heater and the first port of the internal heat exchanger are connected to one port of the four-way reversing valve, the other three ports of the four-way reversing valve are respectively connected to the output end of the compressor, the first port of the external heat exchanger and the oil-liquid separator, the input end of the compressor is connected to the oil-liquid separator, the first one-way channel and the second one-way channel are arranged in parallel, one end of the parallel circuit is connected to the second port of the internal heat exchanger and the second port of the internal heat exchanger, and the other end is connected to the second port of the external heat exchanger, and the internal heat exchanger and the internal heater are arranged in the middle of the internal air duct mechanism. The above air conditioning system realizes the switching of working modes through the four-way reversing valve.

Patent document CN104972865A discloses an air conditioning system for automobiles, including an outlet area, which guides at least a portion of the air mass flow circulating in the air conditioning system to the outside of the automobile; a housing, inside which at least one fan for transferring the air mass flow is formed; and a coolant circuit, which uses a coolant-air-heat exchanger for transferring heat from the coolant to the air mass flow to adjust the automobile parts, especially the drive mechanism parts, to an appropriate temperature. A coolant-air-heat exchanger is arranged in the outlet area, so that the air mass flow guided to the outside of the automobile overflows the coolant-air-heat exchanger. A coolant-air-heat exchanger is arranged inside the housing, and the air mass flow transferred inside the housing overflows the coolant-air-heat exchanger, so that the heat moved from the coolant to the air is only transferred to the air mass flow transferred inside the housing. The above-mentioned air conditioning system realizes the switching of the working mode by a plurality of air guide devices arranged in a housing for air circulation.

The air conditioning system shown in patent document CN103342094B realizes the switching between the cooling/dehumidification working mode and the heating working mode by setting a four-way reversing valve in the refrigerant circuit. Its refrigerant circuit is complex. On the one hand, the pipeline extension resistance is large, the heat loss is large, resulting in low system efficiency; on the other hand, the refrigerant pipeline is complex and difficult to arrange and assemble. At the same time, the off-vehicle heat exchanger set therein needs to be compatible with the two contradictory heat exchange processes of evaporation heat exchange and condensation heat exchange. Its heat exchange performance is significantly reduced compared with the heat exchanger designed for a single heat exchange process.

The air conditioning system shown in patent CN104972865A realizes the switching between the cooling/dehumidification working mode and the heating working mode through a number of air guide devices, thereby simplifying the refrigerant circuit. However, the heat exchanger used for condensation heat exchange is completely placed inside the air circulation shell, and the headwind caused by the vehicle speed cannot be used to improve the heat exchange efficiency of the condenser. The condenser must have a large windward area, which makes it large in size and difficult to arrange. At the same time, since the condenser needs to transfer a large amount of heat to the air in the cooling/dehumidification working mode and a small amount of heat to the air in the heating working mode, in order to take into account both working modes, the condenser in the system tends to have poor heat dissipation in the cooling/dehumidification working mode, and tends to have excessive resistance in the heating mode, resulting in low system efficiency.

Summary of the invention

In view of the above problems, the purpose of the present invention is to provide an automobile air conditioning system, which is an integrated cooling and heating air conditioning system for automobiles, wherein the air conditioning system is provided with a minimum number of valves in the refrigerant circuit, and an air guide device is provided in the air circulation housing, and the switching between the system cooling/dehumidification working mode and the heating working mode is realized through the joint action of the valve and the air guide device. The system volume is reduced while the system cooling/heating efficiency is improved, that is, it is achieved with a minimum number of parts, and the volume is small and the efficiency is high.

The technical solution of the present invention is implemented as follows: an automobile air conditioning system comprises a compressor, an indoor condenser, a three-way valve, an outdoor condenser, a first throttling device, an evaporator, a refrigerant-coolant heat exchanger, a second throttling device, a first refrigerant circuit, a second refrigerant circuit, a first air circulation shell, a second air circulation shell, a second outflow port, a third outflow port, a first outflow port, a damper, a first blower, a second blower, a car cabin, a first electric heater, a second electric heater, a third electric heater, a fourth electric heater, a second outflow port a, a second outflow port b, a partition, a third outflow port a, and a third outflow port b; characterized in that: the first air circulation shell is used to guide air flow; the evaporator is arranged in the first air circulation shell, and the air flow in the first air circulation shell all flows through the evaporator; the first blower is arranged in the first air circulation shell, and is used to generate air flow; the first outflow port guides the air flow in the first air circulation shell to the outside of the shell; the second outflow port guides the air flow in the first air circulation shell to the car cabin; the damper guides the air flow in the first air circulation shell to one of the first outflow port and the second outflow port; the second air circulation shell is used to guide air flow; indoor The condenser is arranged in the second air circulation shell, and the air flow in the second air circulation shell all flows through the indoor condenser; the second blower is arranged in the second air circulation shell for generating air flow; the third flow outlet guides the air flow in the second air circulation shell to the interior of the vehicle; the air conditioning system also includes two refrigerant circuits: the first refrigerant circuit includes a compressor, an outdoor condenser, a first throttling device and an evaporator, and the refrigerant transfers heat to the air outside the vehicle when passing through the outdoor condenser, and absorbs the heat of the air flow in the first air circulation shell when passing through the evaporator; the second refrigerant circuit includes a compressor, an indoor condenser, a first throttling device and an evaporator, and the refrigerant transfers heat to the air flow in the second air circulation shell when passing through the indoor condenser, and absorbs the heat of the air flow in the first air circulation shell when passing through the evaporator; the inlet end of the first throttling device is connected to the outlet ends of the outdoor condenser and the indoor condenser, and the outlet end is connected to the inlet end of the evaporator; the inlet end of the three-way valve is connected to the outlet end of the compressor, one outlet end of the three-way valve is connected to the inlet end of the indoor condenser, and the other outlet end is connected to the inlet end of the outdoor condenser, and the three-way valve guides the refrigerant to flow in one of the first refrigerant circuit and the second refrigerant circuit.

When the three-way valve guides the refrigerant to flow in the first refrigerant circuit, the first blower in the first air circulation housing is turned on, and at the same time, the air valve guides the air in the first air circulation housing to flow to the second outlet, and the second blower in the second air circulation housing is in a closed state. In this case, heat is transferred from the air flow guided toward the vehicle cabin in the first air circulation housing to the refrigerant flowing in the evaporator, and is transferred from the refrigerant flowing in the outdoor condenser to the air outside the vehicle through the first refrigerant circuit.

When the three-way valve guides the refrigerant to flow in the second refrigerant circuit, the first blower and the second blower are turned on, and at the same time, the air valve guides the air flow in the first air circulation housing to the first outlet. In this case, heat is transferred from the air flow guided toward the outside of the housing in the first air circulation housing to the refrigerant flowing in the evaporator, and through the second refrigerant circuit, heat is transferred from the refrigerant flowing in the indoor condenser to the air flow guided toward the vehicle cabin in the second air circulation housing.

An automobile air conditioning system, characterized in that the air conditioning system includes three control modes, wherein the first control mode is a cooling/dehumidification working mode and a heating working mode, and its purpose is to adjust the automobile cabin to an appropriate temperature. In particular, the evaporator in the refrigerant circuit always functions as an evaporator regardless of the working mode, the outdoor condenser only works in the cooling mode and functions as a condenser, and the indoor condenser only works in the heating mode and functions as a condenser; the second control mode includes: a first electric heater and a second electric heater, which are arranged in a first air circulation shell, placed between the air valve and the second flow outlet, and separated by a partition placed vertically along the windward side of the evaporator, the partition extends to the end of the second flow outlet, and divides the space from the leeward side of the evaporator to the end of the second flow outlet into two independent parts, respectively expressed as the second flow outlet a and the second flow outlet b; when the air valve guides the air flow to the second flow outlet, the first air flow The air flow in the shell is evenly divided into two air flows by the partition, and the two air flows flow through the first electric heater and the second electric heater respectively; the third electric heater and the fourth electric heater are arranged in the second air circulation shell, placed between the indoor condenser and the third flow outlet, and are separated by a partition placed vertically along the windward surface of the indoor condenser, and the partition extends to the end of the third flow outlet, and divides the space from the leeward surface of the indoor condenser to the end of the third flow outlet into two independent parts, which are respectively expressed as the third flow outlet a and the third flow outlet b; the air flow in the second air circulation shell is evenly divided into two air flows by the partition, and the two air flows flow through the third electric heater and the fourth electric heater respectively;

The third control method includes: a refrigerant-coolant heat exchanger, which is connected to the refrigerant circuit in parallel with the evaporator and is arranged outside the air circulation shell; and a second throttling device, the inlet end of the second throttling device is connected to the outlet ends of the outdoor condenser and the indoor condenser, and the outlet end of the second throttling device is connected to the inlet end of the refrigerant-coolant heat exchanger; in this case, the first throttling device in the air-conditioning system of the first control method and the second throttling device in the air-conditioning system of the third control method have a cut-off function and can be independently controlled.

The automobile air conditioning system of the second control mode, when in the cooling/dehumidification working mode, the first electric heater and the second electric heater are turned on as the heat source for reheating after the evaporator is dehumidified;

The opening, closing and input power of the first electric heater, the second electric heater, the third electric heater and the fourth electric heater are all independently controlled.

In the automobile air conditioning system of the second control mode, when it is in the cooling/dehumidification working mode, the first electric heater and the second electric heater operate with different input powers, so that the air flows entering the second flow outlet a and the second flow outlet b obtain different amounts of heat, which manifest as different temperatures.

In the automobile air conditioning system of the second control mode, when it is in the heating working mode, the third electric heater and the fourth electric heater operate with different input powers, so that the air flows entering the third flow outlet a and the third flow outlet b obtain different amounts of heat, which manifest as different temperatures.

In the automobile air conditioning system of the third control mode, when the system is in the cooling/dehumidification working mode, the heat generated by the internal combustion engine, the motor and other driving mechanism components, the charger, the battery and other power electronic devices and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the refrigerant-coolant heat exchanger through the refrigerant-coolant heat exchanger. Thus, the above-mentioned driving mechanism components and power electronic devices are adjusted to an appropriate temperature. When the system is in the heating mode, the heat generated by the internal combustion engine, the motor and other driving mechanism components, the charger, the battery and other power electronic devices and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the refrigerant-coolant heat exchanger through the refrigerant-coolant heat exchanger, and is transferred from the refrigerant circulating in the indoor condenser to the air flow guided toward the automobile cabin in the second air circulation shell through the refrigerant circuit; thus, the heat generated by the above-mentioned driving mechanism components and power electronic devices is recovered and used for heating the automobile cabin.

The first air circulation housing and the second air circulation housing can be integrated into one body or arranged separately; they can be arranged in the engine room, the interior of the vehicle, the luggage compartment and other locations that meet the space requirements.

The first air circulation housing and the second air circulation housing are integrated and arranged in the car cabin; wherein the compressor is arranged close to the first air circulation housing and the second air circulation housing, and the outdoor condenser is arranged at the air inlet position in front of the car.

The positive effect of the present invention is that it adopts a refrigerant circuit consisting of two condensers and one evaporator, wherein the evaporator always functions as an evaporator regardless of the working mode, the outdoor condenser only works in the cooling mode, and the indoor condenser only works in the cooling mode, which is different from the refrigerant circuit of the current air-conditioning system.

The outdoor condenser is arranged at the front end of the vehicle, and can utilize the headwind generated by the vehicle speed to improve the heat exchange efficiency, which is beneficial to improving the cooling effect and system cooling efficiency of the air-conditioning system.

The indoor condenser is arranged in the air circulation shell. Since the required heat exchange amount is not large, it is easy to miniaturize, so that the air circulation shell has a compact structure, occupies a small space, and is easy to arrange. At the same time, the compressor, indoor condenser and evaporator can be arranged close to each other, the entire refrigerant circuit is shortened and simplified, the extended resistance is reduced, and the heat loss is reduced, which is conducive to improving the heating performance and heating efficiency of the air conditioning system.

According to the air conditioning system of the second control mode provided by the present invention, when the system is in the cooling/dehumidification working mode, in one case, the system realizes reheating after dehumidification; in another case, two air flows with different temperatures can be obtained at the second outlet a and the second outlet b, and the two air flows with different temperatures are respectively guided to different areas of the car cabin through the air duct system. When the system is in the heating working mode, in one case, when the system senses that the heat transferred from the refrigerant circulating in the indoor condenser to the air flow flowing through the indoor condenser is not enough to adjust the car cabin to an appropriate temperature, the third electric heater and the fourth electric heater are turned on as a supplementary heat source; in another case, two air flows with different temperatures are obtained at the third outlet a and the third outlet b, and the two air flows with different temperatures are respectively guided to different areas of the car cabin through the air duct system. Therefore, the air conditioning system of the second mode provided by the present invention realizes reheating after dehumidification; ensures the defrosting/defogging and heating needs of the vehicle in an extremely low temperature environment; and at the same time meets the possible different cooling/heating needs of the occupants in different seating areas in the car cabin, thereby improving the comfort of the occupants and the luxury of the vehicle.

According to the air conditioning system of the third control mode provided by the present invention, when the system is in the cooling/dehumidification working mode, the vehicle cabin, drive mechanism components and power electronic devices can be adjusted to appropriate temperatures. When the system is in the heating working mode, the heat generated by the above-mentioned drive mechanism components and power electronic devices during operation can be recovered and used for heating the vehicle cabin, thereby improving the overall energy utilization efficiency of the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a refrigerant circuit diagram according to a first control method of the present invention.

FIG. 2 is a refrigerant circuit diagram according to a third control method of the present invention.

3 is an explanatory diagram of a refrigerant flow state in a cooling/dehumidification operation mode of the automobile air conditioning system according to the first control mode of the present invention.

4 is an explanatory diagram of a refrigerant flow state in a heating operation mode of the automotive air conditioning system according to the first control method of the present invention.

5 is an explanatory diagram of a refrigerant flow state in a cooling/dehumidification operation mode of the automotive air conditioning system according to the third control mode of the present invention.

6 is an explanatory diagram of a refrigerant flow state in a heating operation mode of the automotive air conditioning system according to the third control mode of the present invention.

FIG. 7 is a structural diagram of a first air circulation casing and a second air circulation casing according to a first control method of the present invention.

FIG. 8 is a structural diagram of a first air circulation housing and a second air circulation housing according to a second embodiment of the present invention.

FIG. 9 is a side view of a first air circulation casing according to a second embodiment of the present invention.

FIG. 10 is a side view of a second air circulation casing according to a second embodiment of the present invention.

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings and embodiments: As shown in Figure 1, an automobile air conditioning system includes a compressor 1, an indoor condenser 2, a three-way valve 3, an outdoor condenser 4, a first throttling device 5, an evaporator 6, a refrigerant-coolant heat exchanger, a second throttling device 8, a first refrigerant circuit 9, a second refrigerant circuit 10, a first air circulation shell 11, a second air circulation shell 12, a second flow outlet 13, a third flow outlet 14, a first flow outlet 15, a damper 16, a first blower 17, a second blower 18, an automobile cabin 19, a first electric heater 20, a second electric heater 21, a third electric heater 22, a fourth electric heater 23, a second flow outlet a 24, a second flow outlet b 25, a partition 26, a third flow outlet a 27, a third flow outlet b 28; It is characterized in that: the first air circulation shell 11 is used to guide the air flow; the evaporator 6 is arranged in the first air circulation shell 11, and the air flow in the first air circulation shell 11 all flows through the evaporator 6; the first blower 17 is arranged in the first air circulation shell 11, and is used to generate air flow; the first outlet 15 guides the air flow in the first air circulation shell 11 to the outside of the shell; the second outlet 13 guides the air flow in the first air circulation shell 11 to the car compartment 19; the air valve 16 guides the air flow in the first air circulation shell 11 to one of the first outlet 15 and the second outlet 13; the second air circulation shell 12 is used to guide the air flow; the indoor condenser 2 is arranged in the second air circulation shell 12, and the air flow in the second air circulation shell 12 all flows through the indoor condenser 2; the second blower 18 is arranged in the second air circulation shell 12, and is used to generate air flow; the third outlet 14 guides the air flow in the second air circulation shell 12 to the car compartment 19; Air conditioning system It also includes two refrigerant circuits: the first refrigerant circuit 9 includes a compressor 1, an outdoor condenser 4, a first throttling device 5 and an evaporator 6. When the refrigerant passes through the outdoor condenser 4, it transfers heat to the air outside the vehicle, and when passing through the evaporator 6, it absorbs the heat of the air flow in the first air circulation shell 11; the second refrigerant circuit 10 includes a compressor 1, an indoor condenser 2, a first throttling device 5 and an evaporator 6. When the refrigerant passes through the indoor condenser 2, it transfers heat to the air flow in the second air circulation shell 12, and when passing through the evaporator 6, it absorbs the heat of the air flow in the first air circulation shell 11; the inlet end of the first throttling device 5 is connected to the outlet ends of the outdoor condenser 4 and the indoor condenser 2, and the outlet end is connected to the inlet end of the evaporator 6; the inlet end of the three-way valve 3 is connected to the outlet end of the compressor 1, one outlet end of the three-way valve 3 is connected to the inlet end of the indoor condenser 2, and the other outlet end is connected to the inlet end of the outdoor condenser 4, and the three-way valve 3 guides the refrigerant to flow in one of the first refrigerant circuit 9 and the second refrigerant circuit 10.

When the three-way valve 3 guides the refrigerant to flow in the first refrigerant circuit 9, the first blower 17 in the first air circulation housing 11 is turned on, and at the same time, the air valve 16 guides the air in the first air circulation housing 11 to flow to the second outlet 13, and the second blower 18 in the second air circulation housing 12 is in a closed state. In this case, heat is transferred from the air flow guided toward the vehicle cabin 19 in the first air circulation housing 11 to the refrigerant flowing in the evaporator 6, and is transferred from the refrigerant flowing in the outdoor condenser 4 to the air outside the vehicle through the first refrigerant circuit 9.

When the three-way valve 3 guides the refrigerant to flow in the second refrigerant circuit 10, the first blower 17 and the second blower 18 are turned on, and at the same time, the air valve 16 guides the air in the first air circulation housing 11 to flow toward the first outlet 15. In this case, heat is transferred from the air flow guided toward the outside of the housing from the first air circulation housing 11 to the refrigerant flowing in the evaporator 6, and through the second refrigerant circuit 10, heat is transferred from the refrigerant flowing in the indoor condenser 2 to the air flow guided toward the vehicle cabin 19 from the second air circulation housing 12.

Thus, the automobile air conditioning system of the first control mode provided by the present invention forms a cooling/dehumidification operation mode and a heating operation mode, and its purpose is to adjust the automobile cabin 19 to an appropriate temperature. In particular, the evaporator 6 in the refrigerant circuit always functions as the evaporator 6 regardless of the operation mode, the outdoor condenser 4 only works in the cooling mode and functions as a condenser, and the indoor condenser 2 only works in the heating mode and functions as a condenser.

Furthermore, the second type of automobile air-conditioning system provided by the present invention also includes: a first electric heater 20 and a second electric heater 21, which are arranged in the first air circulation shell 11, placed between the air valve 16 and the second flow outlet 13, and separated by a partition 26 placed vertically along the windward side of the evaporator 6. The partition 26 extends to the end of the second flow outlet 13 and divides the space from the leeward side of the evaporator 6 to the end of the second flow outlet 13 into two independent parts, which are respectively expressed as the second flow outlet a and the second flow outlet b. When the air valve 16 guides the air flow to the second outlet 13, the air flow in the first air circulation housing 11 is evenly divided into two air flows by the partition 26, and the two air flows flow through the first electric heater 20 and the second electric heater 21 respectively; the third electric heater 22 and the fourth electric heater 23 are arranged in the second air circulation housing 12, between the indoor condenser 2 and the third outlet 14, and are separated by the partition 26 placed vertically along the windward surface of the indoor condenser 2, and the partition 26 extends to the end of the third outlet 14, and divides the space from the leeward surface of the indoor condenser 2 to the end of the third outlet 14 into two independent parts, which are respectively expressed as the third outlet a and the third outlet b. The air flow in the second air circulation housing 12 is evenly divided into two air flows by the partition 26, and the two air flows flow through the third electric heater 22 and the fourth electric heater 23 respectively.

According to the second mode of the automobile air conditioning system provided by the present invention, when it is in the cooling/dehumidification working mode, the first electric heater 20 and the second electric heater 21 are turned on to serve as the heat source for reheating after the evaporator 6 is dehumidified.

According to the second aspect of the automobile air conditioning system provided by the present invention, the opening, closing and input power of the first electric heater 20, the second electric heater 21, the third electric heater 22 and the fourth electric heater 23 are independently controlled.

According to the second mode of automobile air-conditioning system provided by the present invention, when it is in the cooling/dehumidification working mode, the first electric heater 20 and the second electric heater operate with different input powers, so that the air flows entering the second flow outlet a and the air flows entering the second flow outlet b obtain different amounts of heat, which manifest as different temperatures.

According to the second mode of automobile air-conditioning system provided by the present invention, when it is in the heating working mode, the third electric heater 22 and the fourth electric heater 23 operate with different input powers, so that the air flows entering the third flow outlet a and the air flows entering the third flow outlet b obtain different amounts of heat, which manifest as different temperatures.

Furthermore, the automobile air-conditioning system of the third control mode provided by the present invention also includes: a refrigerant-coolant heat exchanger, which is connected to the refrigerant circuit in parallel with the evaporator 6 and is arranged outside the air circulation shell; and a second throttling device 8, the inlet end of the second throttling device 8 is connected to the outlet ends of the outdoor condenser 4 and the indoor condenser 2, and the outlet end of the second throttling device 8 is connected to the inlet end of the refrigerant-coolant heat exchanger; in this case, the first throttling device 5 in the air-conditioning system of the first control mode and the second throttling device 8 in the air-conditioning system of the third control mode have a cut-off function and can be independently controlled.

According to the automobile air conditioning system of the third control mode provided by the present invention, when the system is in the cooling/dehumidification working mode, the heat generated by the internal combustion engine, the motor and other driving mechanism components, the charger, the battery and other power electronic devices and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the refrigerant-coolant heat exchanger through the above-mentioned refrigerant-coolant heat exchanger. Thus, the above-mentioned driving mechanism components and power electronic devices are adjusted to an appropriate temperature. When the system is in the heating mode, the heat generated by the internal combustion engine, the motor and other driving mechanism components, the charger, the battery and other power electronic devices and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the refrigerant-coolant heat exchanger through the above-mentioned refrigerant-coolant heat exchanger, and is transferred from the refrigerant circulating in the indoor condenser 2 to the air flow guided toward the vehicle cabin 19 in the second air circulation shell 12 through the refrigerant circuit. Thus, the heat generated by the above-mentioned driving mechanism components and power electronic devices is recovered and used for heating the vehicle cabin 19.

The automobile air conditioning system provided by the present invention can be arranged in the engine room, the interior of the vehicle, the luggage compartment and other locations that meet the space requirements. In addition, the first air circulation housing 11 and the second air circulation housing 12 can be integrated or arranged separately.

Preferably, the automobile air conditioning system provided by the present invention is arranged in the engine room of the automobile. The first air circulation housing 11 and the second air circulation housing 12 are integrated into one. In particular, the compressor 1 is arranged as close as possible to the first air circulation housing 11 and the second air circulation housing 12, and the outdoor condenser 4 is arranged at the air inlet position in front of the vehicle.

As shown in FIG1 , the inlet end of the three-way valve 3 is connected to the outlet end of the compressor 1, one outlet end of the three-way valve 3 is connected to the inlet end of the indoor condenser 2, and the other outlet end is connected to the inlet end of the outdoor condenser 4. As shown in FIG3 and FIG4 , the three-way valve 3 can guide the refrigerant to flow in one of the first refrigerant circuit 9 and the second refrigerant circuit 10.

As shown in FIG7 , the evaporator 6 is arranged in the first air circulation housing 11, and the air flow driven by the first blower 17 flows entirely through the evaporator 6. The air valve 16 in the first air circulation housing 11 guides the air flow flowing through the evaporator 6 to one of the first flow outlet 15 toward the outside of the housing and the second flow outlet 13 toward the vehicle interior 19. The indoor condenser 2 is arranged in the second air circulation housing 12, and the air flow driven by the second blower 18 flows entirely through the indoor condenser 2. The air flow flowing through the indoor condenser 2 is guided toward the vehicle interior 19 by the third flow outlet 14.

Therefore, the refrigeration/dehumidification working mode of the automobile air conditioning system of the first control method provided by the present invention is: the three-way valve 3 is controlled to guide the refrigerant to circulate in the first refrigerant circuit 9. At the same time, the blower 17 is turned on to drive the air flow through the evaporator 6. At this time, heat is transferred from the air flow to the refrigerant circulating in the evaporator 6, so that the temperature of the above-mentioned air flow is lower than the external environment temperature. The air valve 16 is controlled to guide the air flow flowing through the evaporator 6 toward the second flow outlet 13. Through the air duct system of the vehicle connected to the second flow outlet, the air flow with a temperature lower than the external environment is guided into the automobile cabin 19, and the automobile cabin 19 is adjusted to an appropriate temperature. The heat transferred from the air flow in the first air circulation shell 11 to the refrigerant circulating in the evaporator 6 is transferred from the refrigerant to the external environment in the outdoor condenser 4 through the first refrigerant circuit 9.

Heating working mode: Control the three-way valve 3 to guide the refrigerant to circulate in the second refrigerant circuit 10. At the same time, turn on the blowers 17 and 18 to drive the air to flow through the evaporator 6 and the indoor condenser 2 respectively. Control the air valve 16 to guide the air flow flowing through the evaporator 6 to the outside of the shell through the first outlet 15. At this time, heat is transferred from the air flow flowing through the evaporator to the refrigerant flowing through the evaporator 6. The above heat and the heat converted by the compressor to the refrigerant are circulated through the refrigerant. At the indoor condenser, the refrigerant flowing in the indoor condenser is transferred to the air flow flowing through the indoor condenser. As a result, the air flow in the second circulation shell 12 is heated, showing a temperature higher than the outside environment. The above air flow is guided into the car cabin 19 through the third outlet 14 and the air duct system of the vehicle connected thereto, and the car cabin 19 is adjusted to an appropriate temperature.

The automobile air conditioning system of the second control mode as shown in Figure 8 also includes: a first electric heater 20 and a second electric heater 21, which are arranged in the first air circulation shell 11, placed between the air valve 16 and the second flow outlet, and separated by a partition 26 placed vertically along the windward side of the evaporator. The partition 26 extends to the end of the second flow outlet and divides the space from the leeward side of the evaporator 6 to the end of the second flow outlet into two independent parts, which are respectively expressed as the second flow outlet a 24 and the second flow outlet b 25. When the air valve 16 guides the air flow to the second outlet, the air flow in the first air circulation housing 11 is evenly divided into two air flows by the partition 26, and the two air flows flow through the first electric heater 20 and the second electric heater 21 respectively; the third electric heater 22 and the fourth electric heater 23 are arranged in the second air circulation housing 12, between the indoor condenser 2 and the third outlet, and are separated by the partition 26 placed vertically along the windward surface of the indoor condenser 2, and the partition 26 extends to the end of the third outlet, and divides the space from the leeward surface of the indoor condenser 2 to the end of the third outlet into two independent parts, which are respectively expressed as the third outlet a 27 and the third outlet b 28. The air flow in the second air circulation housing 12 is evenly divided into two air flows by the partition 26, and the two air flows flow through the third electric heater 22 and the fourth electric heater 23 respectively.

According to the second control mode of the automobile air conditioning system provided by the present invention, as shown in FIG9 , when it is in the cooling/dehumidification working mode, the air flow passing through the evaporator 6 is divided into two uniform streams by the partition 26, which are respectively guided toward the second outlet a 24 and the second outlet b 25 by the air valve 16, and flow through the first electric heater 20 and the second electric heater 21 respectively. In one case, the air flow is cooled and dehumidified after passing through the evaporator 6, and is reheated after flowing through the first electric heater 20 and the second electric heater 21 respectively, and the first electric heater 20 and the second electric heater 21 are used as heat sources for reheating after dehumidification; in another case, the input ends of the first electric heater 20 and the second electric heater 21 are controlled so that they obtain different input powers. As a result, the air flow flowing through the first electric heater 20 and the air flow through the second electric heater 21 obtain different heat, which is manifested as different temperatures. The two air flows of different temperatures are guided to different seating areas in the vehicle cabin 9 by the vehicle air duct system connected to the second outlet a 24 and the second outlet b 25,

According to the second control mode of the automobile air conditioning system provided by the present invention, as shown in FIG10, when it is in the heating working mode, in one case, when the system senses that the heat transferred from the refrigerant circulating in the indoor condenser to the air flow flowing through the indoor condenser is not enough to adjust the automobile cabin 9 to an appropriate temperature, the third electric heater 22 and the fourth electric heater 23 are turned on as a supplementary heat source; in another case, the air flow heated by the indoor condenser 2 is divided into two uniform streams by the partition 26, and the input ends of the third electric heater 22 and the fourth electric heater 23 are controlled at the same time so that the two obtain different input powers. As a result, the air flow flowing through the third electric heater 22 and the air flow flowing through the fourth electric heater 23 obtain different heat, which is manifested as different temperatures. The two air flows of different temperatures are guided to different seating areas in the automobile cabin 9 by the vehicle air duct system connected to the third outlet a 27 and the third outlet b 28.

Therefore, the automobile air-conditioning system of the second control mode provided by the present invention realizes reheating after dehumidification; ensures the defrosting/defogging and heating needs of the vehicle in an extremely low temperature environment; and at the same time meets the possible different cooling/heating needs of occupants in different seating areas in the automobile interior, thereby improving the comfort of the occupants and the luxury of the vehicle.

Furthermore, as shown in Figure 2, the third type of automobile air-conditioning system provided according to the present invention also includes: a refrigerant-coolant heat exchanger 7, which is connected to the refrigerant circuit in parallel with the evaporator 6 and is arranged outside the air circulation shell; and a second throttling device 88, the inlet end of the second throttling device 8 is connected to the outlet ends of the outdoor condenser 4 and the indoor condenser 2, and the outlet end of the second throttling device 8 is connected to the inlet end of the refrigerant-coolant heat exchanger 7; in this case, the above-mentioned first throttling device 55 and the second throttling device 8 have a cut-off function and can be independently controlled.

According to the third embodiment of the automobile air conditioning system provided by the present invention, as shown in FIG5, when the system is in the cooling/dehumidification working mode, the heat generated by the internal combustion engine, the driving mechanism components such as the motor, the charger, the battery and other power electronic devices and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the refrigerant-coolant heat exchanger through the above-mentioned refrigerant-coolant heat exchanger 7. Thus, the above-mentioned driving mechanism components and power electronic devices are adjusted to an appropriate temperature. As shown in FIG6, when the system is in the heating mode, the heat generated by the internal combustion engine, the driving mechanism components such as the motor, the charger, the battery and other power electronic devices and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the refrigerant-coolant heat exchanger 7 through the above-mentioned refrigerant-coolant heat exchanger 7, and is transferred from the refrigerant circulating in the indoor condenser 2 to the air flow guided toward the vehicle cabin 9 in the second air circulation shell 12 through the refrigerant circuit. Thus, the heat generated by the operation of the above-mentioned drive mechanism components and power electronic devices is recovered and used for heating the vehicle interior 9.

The automobile air conditioning system provided by the present invention can be arranged in the engine room, the interior of the vehicle, the luggage compartment and other locations that meet the space requirements. In addition, the first air circulation housing 11 and the second air circulation housing 12 can be integrated or arranged separately.

Preferably, the automobile air conditioning system provided by the present invention is arranged in the engine room of the automobile. The first air circulation housing 11 and the second air circulation housing 12 are integrated into one. In particular, the compressor 5 is as close as possible to the first air circulation housing 11 and the second air circulation housing 12, and the outdoor condenser 4 is arranged at the air inlet position in front of the vehicle.

Claims (6)

1. An air conditioning system for an automobile includes a compressor, an indoor condenser, a three-way valve, an outdoor condenser, a first throttling device, an evaporator, a refrigerant-to-cooling liquid heat exchanger, a second throttling device, a first refrigerant circuit, a second refrigerant circuit, a first air circulation casing, a second outlet, a third outlet, a first outlet, a damper, a first blower, a second blower, an automobile compartment, a first electric heater, a second electric heater, a third electric heater, a fourth electric heater, a second outlet a, a second outlet b, a partition, a third outlet a, a third outlet b; the method is characterized in that: the first air circulation shell is used for guiding air flow; the evaporator is arranged in the first air circulation shell, and air flow in the first air circulation shell completely flows through the evaporator; a first blower is disposed within the first air flow housing for generating an air flow; the first outlet directs air within the first air flow housing to outside the housing; the second outlet directs air within the first air flow housing to the interior of the vehicle; the air valve guides air in the first air circulation housing to flow to one of the first outlet and the second outlet; the second air circulation shell is used for guiding air flow; the indoor condenser is arranged in the second air circulation shell, and the air flow in the second air circulation shell completely flows through the indoor condenser; a second blower is disposed within the second air flow housing for generating an air flow; the third outlet directs air in the second air flow housing to the vehicle interior; the air conditioning system further comprises two refrigerant circuits: the first refrigerant circuit comprises a compressor, an outdoor condenser, a first throttling device and an evaporator, wherein when the refrigerant passes through the outdoor condenser, heat is transferred to the air outside the vehicle, and when the refrigerant passes through the evaporator, the heat of the air flow in the first air circulation shell is absorbed; the second refrigerant circuit comprises a compressor, an indoor condenser, a first throttling device and an evaporator, when the refrigerant passes through the indoor condenser, heat is transferred to the air flow in the second air circulation shell, and when the refrigerant passes through the evaporator, the heat of the air flow in the first air circulation shell is absorbed; the inlet end of the first throttling device is connected with the outlet ends of the outdoor condenser and the indoor condenser, and the outlet end is connected with the inlet end of the evaporator; the inlet end of the three-way valve is connected with the outlet end of the compressor, one outlet end of the three-way valve is connected with the inlet end of the indoor condenser, the other outlet end of the three-way valve is connected with the inlet end of the outdoor condenser, and the three-way valve guides the refrigerant to flow in one of the first refrigerant loop and the second refrigerant loop; when the three-way valve guides the refrigerant to flow in the first refrigerant loop, the first air blower in the first air circulation shell is started, and meanwhile, the air valve guides the air in the first air circulation shell to flow to the second outlet, and at the moment, the second air blower in the second air circulation shell is in a closed state; in this case, heat is transferred from the air guided in the first air flow case toward the vehicle cabin to the refrigerant flowing in the evaporator, and the refrigerant flowing in the outdoor condenser is transferred to the outside air through the first refrigerant circuit; when the three-way valve guides the refrigerant to flow in the second refrigerant loop, the first air blower and the second air blower are started, and meanwhile, the air valve guides the air in the first air circulation shell to flow to the first outlet; in this case, heat is transferred from the air guided in the first air flow case toward the outside of the case to the refrigerant flowing in the evaporator, and transferred from the refrigerant flowing in the interior condenser to the air flow guided in the second air flow case toward the vehicle cabin through the second refrigerant circuit; the first air circulation shell and the second air circulation shell are integrally arranged in the automobile cabin; wherein the compressor is disposed adjacent the first and second air flow casings and the outdoor condenser is disposed at a front air intake position.

2. An air conditioning system for a vehicle according to claim 1, wherein the air conditioning system comprises three control modes, wherein the first control mode is a cooling/dehumidifying operation mode and a heating operation mode, and the purpose of the air conditioning system is to adjust the vehicle cabin to an appropriate temperature; the evaporator in the refrigerant loop always plays the role of the evaporator irrespective of the working mode, the outdoor condenser only works in the refrigerating mode and plays the role of the condenser, and the indoor condenser only works in the heating mode and plays the role of the condenser; the second control method includes: a first electric heater and a second electric heater arranged in the first air circulation housing, interposed between the damper and the second outlet, and partitioned by a partition plate disposed in a direction perpendicular to the windward side of the evaporator, the partition plate extending to the second outlet end and partitioning a space between the leeward side of the evaporator and the second outlet end into two independent parts, expressed as a second outlet a and a second outlet b, respectively; when the air valve guides air to flow to the second outlet, the air flow in the first air circulation shell is uniformly divided into two air flows by the partition plate, and the two air flows respectively flow through the first electric heater and the second electric heater; a third electric heater and a fourth electric heater disposed in the second air circulation housing, interposed between the indoor condenser and the third outlet, and partitioned by a partition plate disposed in a direction perpendicular to a windward side of the indoor condenser, the partition plate extending to a third outlet end and partitioning a space between a leeward side of the indoor condenser and the third outlet end into two independent parts, respectively expressed as a third outlet a and a third outlet b; the air flow in the second air circulation shell is uniformly divided into two air flows by the partition plate, and the two air flows respectively flow through the third electric heater and the fourth electric heater; the third control method includes: a refrigerant-cooling liquid heat exchanger connected in parallel with the evaporator and connected to a refrigerant circuit, and arranged outside the air circulation shell; and the inlet end of the second throttling device is connected with the outlet ends of the outdoor condenser and the indoor condenser, and the outlet end of the second throttling device is connected with the inlet end of the refrigerant-cooling liquid heat exchanger; in this case, the first throttle device in the air conditioning system according to the first control method and the second throttle device in the air conditioning system according to the third control method have a shut-off function and can be independently controlled.

3. The air conditioning system for automobile according to claim 2, wherein the second control mode of the air conditioning system for automobile is characterized in that when the air conditioning system for automobile is in the cooling/dehumidifying operation mode, the first electric heater and the second electric heater are turned on to serve as the heat source for reheating after the dehumidification of the evaporator; the on and off of the first electric heater, the second electric heater, the third electric heater and the fourth electric heater and the input power are independently controlled.

4. The air conditioning system for automobile according to claim 2, wherein the second control mode of the air conditioning system for automobile is characterized in that the first electric heater and the second electric heater are operated with different input powers when in the cooling/dehumidifying operation mode, so that the air streams entering the second outlet a and the second outlet b obtain different heat, which is expressed as different temperatures.

5. The air conditioning system for automobile according to claim 4, wherein the second control mode of the air conditioning system for automobile is characterized in that the third electric heater and the fourth electric heater are operated with different input powers when in the heating operation mode, so that the air flows entering the third outlet a and the third outlet b obtain different heat, and are represented by different temperatures.

6. The air conditioning system for automobile according to claim 2, wherein the heat generated by the driving mechanism components such as the internal combustion engine, the motor, the battery, and the other power electronics and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the coolant-coolant heat exchanger through the coolant-coolant heat exchanger when the system is in the cooling/dehumidifying operation mode; thereby, the above-mentioned driving mechanism component and the power electronics are adjusted to an appropriate temperature; when the system is in the heating mode, heat generated by the internal combustion engine, or by motor drive mechanism components, the charger, the battery, and other power electronics and transferred to the coolant circulating in the coolant circuit is transferred from the coolant circulating in the coolant circuit to the refrigerant circulating in the coolant-coolant heat exchanger through the above-described refrigerant-to-coolant heat exchanger, and from the refrigerant circulating in the indoor condenser to the air flow directed toward the vehicle cabin in the second air flow housing through the refrigerant circuit; thereby, heat generated by the driving mechanism component and the power electronic device is recovered and used for heating the automobile cabin.