CN222271748U - Heat pump system and vehicle - Google Patents
Heat pump system and vehicle Download PDFInfo
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- CN222271748U CN222271748U CN202421220518.1U CN202421220518U CN222271748U CN 222271748 U CN222271748 U CN 222271748U CN 202421220518 U CN202421220518 U CN 202421220518U CN 222271748 U CN222271748 U CN 222271748U
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Abstract
本实用新型提供了一种热泵系统及车辆，涉及车辆技术领域。本实用新型所述的热泵系统，包括压缩机、换热器、冷凝器和暖通空调，所述压缩机、所述换热器和所述冷凝器依次连接组成回路，所述暖通空调分别与所述压缩机及所述冷凝器连接，所述暖通空调包括功率可调的鼓风机，所述暖通空调与所述冷凝器之间设有转速可调的泵。本实用新型可以迅速将高压拉高，保证系统里有充足的热量，然后用户可以增大泵的转速和鼓风机的功率，并调节相应阀门，使得吸气过热度达到预设目标，从而实现热气旁通制热，由于高压迅速拉高，压缩机可拉至最高转速而不会触发低压保护，进一步保证后续的持续热量输出。
The utility model provides a heat pump system and a vehicle, and relates to the field of vehicle technology. The heat pump system described in the utility model includes a compressor, a heat exchanger, a condenser and a HVAC, wherein the compressor, the heat exchanger and the condenser are connected in sequence to form a loop, and the HVAC is connected to the compressor and the condenser respectively, and the HVAC includes a blower with adjustable power, and a speed-adjustable pump is provided between the HVAC and the condenser. The utility model can quickly increase the high pressure to ensure that there is sufficient heat in the system, and then the user can increase the speed of the pump and the power of the blower, and adjust the corresponding valves so that the suction superheat reaches the preset target, thereby realizing hot gas bypass heating. Since the high pressure is quickly increased, the compressor can be pulled to the highest speed without triggering low-pressure protection, further ensuring the subsequent continuous heat output.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a heat pump system and a vehicle.
Background
When the ambient temperature is low, the heat pump system generally needs to provide a heat source for the whole vehicle by means of a PTC (Positive Temperature Coefficient ) electric heater, which causes an increase in cost, and the PTC electric heater has a lower energy utilization rate than the heat pump system, and is arranged in the cabin, so that a part of heat loss exists, and in order to reduce the manufacturing cost of the whole vehicle and save energy consumption, the hot air bypass is performed by using HVAC (Heating, ventilation, and Air Conditioning) internal cooling, that is, the hot air returns to the compressor through an internal condenser of the HVAC.
However, when the balance pressure of the system is too low (the balance pressure is influenced by the temperature of the external environment) in a low-temperature environment, the low-pressure protection is triggered very easily, so that the rotating speed of the compressor cannot be quickly increased, the release of the heat of the system is restrained by the low rotating speed, the high pressure is slowly increased, the time for reaching the target temperature of the cold starting output end is prolonged, and when the high pressure is too low, even if the compressor is at the highest rotating speed, the hot gas bypass performance is too low, and the maximum efficiency of the system cannot be exerted.
Disclosure of utility model
The utility model solves the problem of how to quickly pull up the high pressure of the system.
In order to solve the problems, the utility model provides a heat pump system and a vehicle.
In a first aspect, the utility model provides a heat pump system, which comprises a compressor, a heat exchanger, a condenser and a heating ventilation air conditioner, wherein the compressor, the heat exchanger and the condenser are sequentially connected to form a loop, the heating ventilation air conditioner is respectively connected with the compressor and the condenser, the heating ventilation air conditioner comprises a blower with adjustable power, and a pump with adjustable rotating speed is arranged between the heating ventilation air conditioner and the condenser.
Optionally, the heating ventilation air conditioner further comprises a heating core body, the heating core body is connected with a cooling liquid pipeline of the condenser to form a loop, and the pump is arranged between the heating core body and the condenser.
Optionally, the heating ventilation air conditioner further comprises an evaporator, one end of the evaporator is connected with the compressor, and the other end of the evaporator is connected with the condenser.
Optionally, the heat pump system further comprises a first valve, the first valve being disposed between the evaporator and the condenser.
Optionally, the blower includes a power regulator for regulating a power gear of the blower, wherein the power gear of the blower includes a stop gear and a plurality of different preset power gears.
Optionally, the pump comprises a rotational speed regulator for regulating a rotational speed gear of the pump, wherein the rotational speed gear of the pump comprises a plurality of different preset rotational speed gears between 0% and 100%.
Optionally, the heat pump system further comprises a second valve, the second valve being arranged between the heat exchanger and the condenser.
Optionally, the heat pump system further comprises a third valve for hot gas bypass, the third valve being arranged in parallel with the compressor.
Optionally, the heat pump system further comprises a discharge pressure detector disposed at an outlet of the compressor, the discharge pressure detector being configured to detect a discharge pressure of the compressor.
In a second aspect, the present utility model provides a vehicle comprising the heat pump system described above.
According to the utility model, the blower with adjustable power is arranged in the heating ventilation air conditioner, for example, a user can select a power gear to be a stop gear, a low power gear, a high power gear and the like, and the pump with adjustable rotating speed is arranged between the heating ventilation air conditioner and the condenser, for example, the user can adjust the rotating speed between 0% and 100% of the maximum rotating speed, so that in a starting stage, the user can adjust the blower to the stop gear and the rotating speed of the pump to be zero, so that sufficient heat is ensured in the system, the temperature of the refrigerant rises to enable the pressure to rise due to the fact that the heat remains in the refrigerant, the system can be quickly pulled up, then the user can increase the rotating speed of the pump and the power of the blower, and adjust corresponding valves to enable the suction superheat degree to reach a preset target, thereby realizing hot gas bypass heating, and the compressor can be pulled up to the maximum rotating speed without triggering low-pressure protection due to the fact that the high pressure is quickly pulled up, and further ensuring the subsequent continuous heat output.
Drawings
FIG. 1 is a schematic diagram of a heat pump system according to an embodiment of the present utility model;
Fig. 2 is a schematic diagram of a heat pump system according to an embodiment of the utility model.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1, the embodiment of the utility model provides a heat pump system, which comprises a compressor, a heat exchanger, a condenser and a heating ventilation air conditioner, wherein the compressor, the heat exchanger and the condenser are sequentially connected to form a loop, the heating ventilation air conditioner is respectively connected with the compressor and the condenser, the heating ventilation air conditioner comprises a blower with adjustable power, and a pump with adjustable rotating speed is arranged between the heating ventilation air conditioner and the condenser.
Specifically, the heat pump system comprises a compressor, a heat exchanger (such as a plate heat exchanger), a condenser (such as a water-cooled condenser) and a heating ventilation air conditioner, wherein the compressor, the heat exchanger and the condenser are sequentially connected to form a loop (which can be called an air conditioning loop), the heating ventilation air conditioner is respectively connected with the compressor and the condenser, and the heat exchanger can be connected with heating elements such as a motor, a battery and other electric devices of a vehicle, so that heat is introduced into the heat pump system.
The heating ventilation air conditioner comprises a blower with adjustable power, the power of the blower can be adjusted according to the requirement, such as a stop gear, a low power gear, a high power gear and the like, a pump (such as a water pump) with adjustable rotating speed is arranged between the heating ventilation air conditioner and a condenser, the rotating speed of the pump can be adjusted according to the requirement, such as between 0% and 100% of the maximum rotating speed, when the rotating speed of the pump is 0% of the maximum rotating speed, the pump is completely stopped, the motor of the pump is not electrified or the rotating speed of the motor is controlled to be zero, when the rotating speed of the pump is 50% of the maximum rotating speed, the rotating speed of the pump is equal to half of the maximum design rotating speed, the power supply frequency or voltage of the motor is generally adjusted to a corresponding intermediate value, when the rotating speed of the pump is 100% of the maximum rotating speed, the pump is operated at the designed maximum rotating speed, and the motor of the pump is supplied with power at the highest voltage or frequency, so that the rotating speed reaches the maximum design value. For example, in the starting stage, heat can be introduced into the heat pump system through the heat exchanger, a user can adjust the blower to a stop gear and adjust the rotation speed of the pump to zero, so that the heating ventilation air conditioner is closed to ensure sufficient heat in the system, the temperature of the refrigerant rises to raise the pressure due to the fact that the heat is remained in the refrigerant, the high pressure can be quickly raised (for example, 20 bar.A) to shorten the cold starting time, then the user can gradually increase the rotation speed of the pump and the power of the blower, and adjust corresponding valves (for example, the second valve shown in fig. 2 is turned down) to enable the suction superheat degree to reach a preset target (meanwhile, the saturation temperature meets the preset target), thereby realizing hot gas bypass heating, and the compressor can be pulled to the highest rotation speed without triggering low pressure protection (normally triggering low pressure protection when the low pressure is lower than 1 bar.A) due to the fact that the high pressure is quickly raised, so that the subsequent continuous heat output is further ensured. For example, at an ambient temperature of-30 ℃ to 10 ℃ (the common ambient temperature of the heat pump), the embodiment can rapidly pull the high pressure of the heat pump system high without using extra electric heating and other heat sources, so that the output heat of the system is ensured to be sufficient, and the air outlet temperature meets the target request.
The condenser is used for transferring heat in an air conditioning system by bringing a cooling liquid (e.g., cooling water) into contact with the high-pressure and high-temperature gas passing through the condenser to reduce the temperature of the high-pressure and high-temperature gas, thereby converting the gas into a liquid state.
In the operation process of the heat pump system, due to the changes of indoor and outdoor temperature, load requirements and other factors, the rotation speed of the compressor may need to be adjusted so as to keep the stable operation of the system, improve the energy efficiency and ensure the comfort. By controlling the lifting rotation speed, the system can increase or decrease the running speed of the compressor according to the requirement, thereby adjusting the refrigerating or heating capacity to adapt to different working conditions. Wherein the compressor may adjust the rotational speed in several ways:
(1) Variable frequency speed control technology an air conditioning system generally adopts a variable frequency speed control technology, namely a variable frequency driven compressor. The accurate control of the rotational speed of the compressor is achieved by adjusting the voltage, frequency or current of the motor. The variable frequency speed regulation technology can dynamically regulate the rotating speed of the compressor according to actual demands, so that the compressor can run under different working conditions, and continuous regulation can be realized, thereby improving the energy efficiency and performance of the system.
(2) The multi-stage compression is that some high-end air conditioning systems use a multi-stage compression technology, namely, a plurality of compression stages or a plurality of compressor units are arranged in the compressor, and different stages or units are selected to work according to actual requirements so as to realize the adjustment of rotating speed. This method is commonly used in high power or wide operating range air conditioning systems.
(3) In the clutch control, in an automobile air conditioner, the rotating speed can be adjusted by controlling the clutch of the compressor. When the refrigerating capacity needs to be reduced, the clutch of the compressor can be disconnected to stop rotating, and when the refrigerating capacity needs to be increased, the clutch of the compressor can be connected to start rotating.
(4) Electronic control systems air conditioning systems are typically equipped with an electronic control system that monitors environmental parameters (e.g., room temperature, evaporator temperature, refrigeration load, etc.) via sensors and then adjusts the speed of the compressor based on these parameters. The electronic control system can automatically adjust the rotating speed of the compressor according to real-time requirements so as to realize stable operation and energy efficiency optimization of the system.
Optionally, the heating ventilation air conditioner further comprises a heating core body, the heating core body is connected with a cooling liquid pipeline of the condenser to form a loop, and the pump is arranged between the heating core body and the condenser.
Specifically, as shown in connection with fig. 2, the heating ventilation air conditioner further comprises a heating core body, the heating core body is responsible for providing hot air for the passenger cabin, two ends of the heating core body are connected with two ends of a cooling liquid pipeline of the condenser to form a cooling liquid circulation loop, and the pump is arranged between the heating core body and the condenser.
Wherein the cooling fluid is typically a mixture of ethylene glycol and water which does not freeze at low temperatures while also maintaining a liquid state at high temperatures, and wherein the cooling fluid flows (may be driven by a pump) between the warm air core and the condenser to effect heat transfer.
Wherein the warm air core is usually a small radiator, and can heat the air in the vehicle through water cooling or directly through the cooling liquid circulation of the engine, and the warm air core is usually composed of a series of metal pipelines and cooling fins. Through which a coolant, such as engine coolant, flows, and during the coolant circulation, the radiator core absorbs heat and transfers it to the surrounding air.
Optionally, the heating ventilation air conditioner further comprises an evaporator, one end of the evaporator is connected with the compressor, and the other end of the evaporator is connected with the condenser.
Specifically, as shown in fig. 2, the heating ventilation air conditioner further includes an evaporator, an outlet collecting end of the evaporator is connected with the compressor, the other end of the evaporator is connected with the condenser, the liquid refrigerant output from the condenser can pass through the evaporator and then flow back to the compressor, the evaporator is used for being matched with a blower to realize refrigeration, for example, the blower drives air to flow through the evaporator, and the liquid refrigerant in the evaporator absorbs heat and evaporates into gas, so that a refrigeration effect is realized, and cold air is provided for the passenger cabin.
Optionally, the heat pump system further comprises a first valve, the first valve being disposed between the evaporator and the condenser.
Specifically, as shown in fig. 2, the heat pump system further includes a first valve (e.g., an electronic expansion valve), a port for outputting a refrigerant (e.g., a low-pressure refrigerant) in the condenser is connected to two branches, a first valve is disposed on one branch, an outlet end of the first valve is connected to the evaporator, when the first valve is opened, the evaporator is communicated with the condenser, the compressor, the evaporator and the condenser form a refrigeration system, the refrigerant flows in the refrigeration system, and changes states under different pressures and temperatures through cyclic compression and expansion processes, thereby absorbing or releasing heat, and the first valve is normally in a closed state during a startup phase.
Optionally, the blower includes a power regulator for regulating a power gear of the blower, wherein the power gear of the blower includes a stop gear and a plurality of different preset power gears.
Specifically, the blower includes a power regulator, and the power regulator is used for adjusting the power gear of the blower, for example adopts the variable frequency speed control technique, adjusts the rotational speed of motor according to the demand to adjust the power of blower, and the blower can have shut down shelves and a plurality of power gear that predetermine, and the user can select different gears as required.
Common gear adjustment modes include:
(1) Voltage regulation, namely changing the rotating speed and the power of the blower by regulating the power supply voltage. Decreasing the voltage decreases the output power of the blower, while increasing the voltage increases the power (typically for a dc or ac motor).
(2) Rotational speed control-the power of the blower can be regulated by controlling the rotational speed of the motor. This may be achieved by adjusting the voltage of the motor, using a frequency converter (frequency inverter) or other motor control means. By decreasing or increasing the rotational speed of the motor, the output of the blower can be adjusted accordingly.
(3) The output power of the blower can also be realized by adjusting the rotation speed or angle of the blower, and changing the position or shape of the blower can change the air flow and pressure provided by the blower, thereby changing the power.
(4) Soft starter and soft stopper by using the same, the blower power can be gradually adjusted, avoiding abrupt current impact and mechanical stress, prolonging the service life of the device, and improving efficiency.
(5) Automatic control system the power of the blower may also be regulated by connection to the automatic control system. The blower power may be automatically adjusted to meet system requirements based on environmental conditions, process requirements, or other parameters.
Optionally, the pump comprises a rotational speed regulator for regulating a rotational speed gear of the pump, wherein the rotational speed gear of the pump comprises a plurality of different preset rotational speed gears between 0% and 100%.
In particular, the pump comprises a speed regulator for regulating the speed of the pump, generally referred to as regulating the flow of the pump, which can be achieved for example by regulating the driving motor of the pump or by using a frequency converter or the like, since the flow of the pump is generally proportional to its speed, a reduction in the speed of the pump reducing the flow of the pump and an increase in the speed of the pump increasing the flow.
The flow of the pump can be realized by adjusting the diameter of an impeller or the angle of blades of the pump, and the performance of the pump can be changed by changing the impeller or adjusting the angle of the blades, so that the flow is adjusted.
The flow rate of the flow passing through the valve can be regulated by installing the speed regulating valve in the outlet or the pipeline of the pump, and the resistance in the pipeline can be changed by regulating the opening of the speed regulating valve, so that the flow rate of the pump is influenced.
Because the power of the blower and the rotating speed of the pump are provided with a plurality of gears, a user can slowly increase the air quantity and the flow of the cooling liquid according to actual needs, the high pressure can be ensured to be stably maintained at a higher level, the heat of the system cannot be greatly fluctuated, the heat is provided by fully utilizing the hot gas bypass heat source, and the influence of the environmental temperature is avoided.
Optionally, the heat pump system further comprises a second valve, the second valve being arranged between the heat exchanger and the condenser.
Specifically, as shown in fig. 2, the heat pump system further includes a second valve (e.g., an electronic expansion valve), a port for outputting a refrigerant in the condenser is connected to the second valve (which may be called a shutoff valve), an outlet end of the second valve is connected to the heat exchanger, the flow between the heat exchanger and the condenser can be adjusted through the second valve, and a user can increase the suction superheat degree by closing the second valve.
Optionally, the heat pump system further comprises a third valve for hot gas bypass, the third valve being arranged in parallel with the compressor.
Specifically, as shown in connection with fig. 2, the heat pump system further includes a third valve (e.g., an electronic expansion valve) for bypassing the hot gas, where the third valve (may be referred to as a hot gas bypass valve) is disposed in parallel with the compressor, and the hot gas bypass valve may adjust a ratio between the cold gas and the hot gas, and may adjust a heating temperature by adjusting an opening and closing degree of the hot gas bypass valve.
Optionally, the heat pump system further comprises a discharge pressure detector disposed at an outlet of the compressor, the discharge pressure detector being configured to detect a discharge pressure of the compressor.
Specifically, as shown in connection with fig. 2, the heat pump system further includes a discharge pressure detector provided at an outlet of the compressor for detecting a discharge pressure of the compressor, i.e., a pressure generated when the inside of the compressor compresses and discharges gas. In the refrigeration cycle, a compressor is responsible for compressing a low-pressure refrigerant gas (refrigerant) into a high-pressure gas, which is then sent to a condenser, thereby completing a portion of the refrigeration cycle.
Another embodiment of the present utility model provides a vehicle including the heat pump system described above.
Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.
Claims (10)
1. The utility model provides a heat pump system, its characterized in that includes compressor, heat exchanger, condenser and heating ventilation air conditioner, the compressor the heat exchanger with the condenser connects gradually and constitutes the return circuit, heating ventilation air conditioner respectively with the compressor reaches the condenser is connected, heating ventilation air conditioner includes power adjustable air-blower, heating ventilation air conditioner with be equipped with the rotational speed adjustable pump between the condenser.
2. The heat pump system of claim 1, wherein the hvac further comprises a warm air core connected to a coolant line of the condenser to form a loop, the pump being disposed between the warm air core and the condenser.
3. The heat pump system of claim 2, wherein the hvac further comprises an evaporator, one end of the evaporator being connected to the compressor, the other end of the evaporator being configured to be connected to the condenser.
4. The heat pump system of claim 3, further comprising a first valve disposed between the evaporator and the condenser.
5. The heat pump system of claim 1, wherein the blower includes a power regulator for regulating a power gear of the blower, wherein the power gear of the blower includes a shutdown gear and a plurality of different preset power gears.
6. The heat pump system of claim 1, wherein the pump includes a speed regulator for regulating a speed gear of the pump, wherein the speed gear of the pump includes a plurality of different preset speed gears between 0% and 100%.
7. The heat pump system of claim 1, further comprising a second valve disposed between the heat exchanger and the condenser.
8. The heat pump system of claim 1, further comprising a third valve for hot gas bypass, the third valve being disposed in parallel with the compressor.
9. The heat pump system of claim 1, further comprising a discharge pressure detector disposed at an outlet of the compressor, the discharge pressure detector for detecting a discharge pressure of the compressor.
10. A vehicle comprising a heat pump system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421220518.1U CN222271748U (en) | 2024-05-31 | 2024-05-31 | Heat pump system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421220518.1U CN222271748U (en) | 2024-05-31 | 2024-05-31 | Heat pump system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222271748U true CN222271748U (en) | 2024-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421220518.1U Active CN222271748U (en) | 2024-05-31 | 2024-05-31 | Heat pump system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222271748U (en) |
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2024
- 2024-05-31 CN CN202421220518.1U patent/CN222271748U/en active Active
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