Heat pump system and vehicle

Abstract

The invention relates to the technical field of automobiles, in particular to a heat pump system and a vehicle. The heat pump system comprises a heat pump device, a refrigeration assembly, a heat exchange assembly and a switching assembly. The heating assembly is connected to the condenser to form a first loop; the refrigeration assembly is connected with the compressor and the condenser to form a second loop. The heat exchange assembly is connected with the compressor and the condenser to form a third loop. The switching assembly is connected to the second loop and the third loop, and at least part of the switching assembly is connected to the heat exchange assembly and the compressor to form a fourth loop; the switching assembly is used for controlling the flow of the second loop, the third loop and the fourth loop. According to the heat pump system, the switching assembly is connected with the refrigeration assembly and the heat exchange assembly to form the multiple loops, and the overall structure is simpler; on the premise that no extra heat source is needed, the cold starting performance of the compressor in the low-temperature environment can be effectively improved, the using effect is good, and the overall cost of the heat pump system is also reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a heat pump system and a vehicle. Background Art

[0002] As the world pays more and more attention to renewable energy and clean transportation, electric vehicles (with their zero emission and low noise characteristics) are widely welcomed. In the thermal management system of electric vehicles, heat pump technology is widely used because it can realize multiple functions such as heating, cooling, dehumidification, etc. at the same time.

[0003] Traditional heat pump systems usually need to be equipped with multiple heat exchangers and valves, including the installation of multiple heat exchangers and multiple valves (such as multi-way solenoid valves, one-way valves, etc.), which not only increases the complexity of the system, but also significantly increases the overall manufacturing cost. In addition, in order to ensure good performance in low temperature environments, many heat pump systems must also rely on PTC electric heaters to achieve heating functions, further increasing product costs.

[0004] Therefore, it is necessary to make improvements to the above problems in order to change the current situation. Summary of the invention

[0005] In view of the above problems, an embodiment of the present invention provides a heat pump system and a vehicle, which are used to solve the problems of complex structure and high manufacturing cost of existing heat pump systems.

[0006] A first aspect of the present application provides a heat pump system, comprising:

[0007] A heat pump device, comprising a compressor, a condenser and a heating component, wherein the condenser is connected to the compressor, and the heating component is connected to the condenser to form a first loop;

[0008] A refrigeration component, connected to the compressor and the condenser respectively to form a second circuit;

[0009] a heat exchange component, connected to the compressor and the condenser respectively to form a third loop; and

[0010] A switching component is connected to the second circuit and the third circuit respectively, and the switching component is at least partially connected to the heat exchange component and the compressor to form a fourth circuit; the switching component is used to control the flow of the second circuit, the third circuit and the fourth circuit.

[0011] In one possible implementation, the switching component includes a first expansion valve, and the first expansion valve, the compressor, and the heat exchange component are sequentially connected to form the fourth circuit, and the first expansion valve is used to control the flow of the fourth circuit.

[0012] In one possible implementation, the heat exchange component includes a heat exchanger and a heat exchange pipeline, the heat exchanger is respectively connected to the switching component and the compressor; the heat exchange pipeline is respectively connected to the heat exchanger and an external heat exchange element, and the heat exchange pipeline is used to transport a heat exchange cooling medium.

[0013] In a possible implementation, the refrigeration component includes an evaporator, and the evaporator is respectively connected to the condenser and the compressor to form the second circuit.

[0014] In a possible implementation, the refrigeration assembly further includes a blower, which is connected to the evaporator and is used to drive air flow relative to the evaporator.

[0015] In one possible implementation, the heat pump device also includes a high-pressure liquid storage tank and a cooling assembly, one end of the high-pressure liquid storage tank is connected to the condenser, and the other end of the high-pressure liquid storage tank is respectively connected to the refrigeration assembly and the heat exchange assembly; the cooling assembly is respectively connected to the condenser and the high-pressure liquid storage tank, and the cooling assembly is used to cool the condenser and / or the high-pressure liquid storage tank, and the cooling assembly is used to liquefy the cooling medium passing through the high-pressure liquid storage tank.

[0016] In one possible implementation, the heating component includes a heater core, a heater pipeline and a heater drive pump, the heater core is connected to the condenser via the heater pipeline, the heater drive pump is disposed on the heater pipeline and is used to drive the heater medium to be transported between the heater core and the condenser.

[0017] In one possible implementation, the switching component includes a second expansion valve, a third expansion valve and a fourth expansion valve, the second expansion valve is arranged between the heat pump device and the refrigeration component and is used to control the flow of the second circuit; the third expansion valve is arranged between the heat pump device and the heat exchange component and is used to control the flow of the third circuit; the fourth expansion valve is arranged between the condenser and the compressor.

[0018] A second aspect of the present application provides a vehicle, comprising a heat pump system as described in any one of the above.

[0019] In one possible implementation, the vehicle further includes a battery, and the heat exchange component is coupled to the battery and is used for heat exchange with the battery.

[0020] Implementing the embodiments of the present application has the following beneficial effects:

[0021] When using the heat pump system of this embodiment, the cooling function of the heat pump system can be realized by connecting the second circuit, and the heat exchange function of the heat pump system can be realized by connecting the third circuit. At this time, the heat pump system can be used to dissipate heat for external components that need heat dissipation, and the heating function of the heat pump system can be realized by connecting the first circuit. By connecting the second circuit and the third circuit, the cooling and heat exchange functions of the heat pump system can be realized at the same time, such as the cooling and heat dissipation functions in vehicles; when the heat pump system is operating in a low-temperature environment, the switching component is connected to the fourth circuit, and the cold start operation of the compressor in a low-temperature environment can be realized without the need for an additional heat source, thereby improving the operating performance of the heat pump system in a low-temperature environment.

[0022] In the heat pump system of the present embodiment, a switching component is connected to the refrigeration component and the heat exchange component respectively to form a plurality of circuits respectively. Compared with the heat pump system using a multi-way valve in the prior art, the overall structure is simpler. In addition, by setting a fourth circuit in the heat pump system, the cold start performance of the compressor in a low temperature environment can be effectively improved without the need for an additional heat source, and the efficiency of the heat pump system entering a normal operating state can be improved. The use effect is good, and the overall cost of the heat pump system can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of a heat pump system in an embodiment of the present invention is shown;

[0025] Figure 2 A schematic diagram of the structure of a refrigeration assembly in an embodiment of the present invention is shown;

[0026] Figure 3 A schematic diagram of the structure of a heat exchange assembly in an embodiment of the present invention is shown;

[0027] Figure 4 A schematic diagram showing the principle of a heat pump system in a first cooling mode according to an embodiment of the present invention is shown;

[0028] Figure 5 A schematic diagram showing the principle of a heat pump system in a second cooling mode according to an embodiment of the present invention is shown;

[0029] Figure 6 A schematic diagram showing the principle of a heat pump system in a first heating mode according to an embodiment of the present invention is shown;

[0030] Figure 7 A schematic diagram showing the principle of a heat pump system in a second heating mode according to an embodiment of the present invention is shown;

[0031] Figure 8 A schematic diagram showing the principle of a heat pump system in a third heating mode according to an embodiment of the present invention is shown;

[0032] Fig. 9 A schematic diagram showing the principle of a heat pump system in a dehumidification mode according to an embodiment of the present invention is shown;

[0033] Reference numerals:

[0034] 10. Heat pump system;

[0035] 100, heat pump device; 110, compressor; 120, condenser; 130, heating component; 140, high-pressure liquid storage tank; 150, cooling component;

[0036] 200, refrigeration assembly; 210, evaporator; 220, blower; 230, one-way valve;

[0037] 300, heat exchange component; 310, heat exchanger; 320, heat exchange pipeline;

[0038] 400, switching assembly; 410, first expansion valve; 420, second expansion valve; 430, third expansion valve; 440, fourth expansion valve;

[0039] 20.Battery. DETAILED DESCRIPTION

[0040] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0041] In the thermal management system of electric vehicles, heat pump technology is widely used because it can realize multiple functions such as heating, cooling, and dehumidification at the same time. Technicians have found that traditional heat pump systems usually need to be equipped with multiple heat exchangers and valves, including multiple heat exchangers (three or more) and multiple valves (electronic expansion valves, one-way valves, electric stop valves). In order to achieve the hot and cold control of the heat pump system, it is generally necessary to connect multiple branches (usually more than three) through a multi-way solenoid valve. When using different modes, the multi-way solenoid valve is switched and the compressor pipeline can be connected to different branches. However, in the solution using a multi-way solenoid valve, not only the overall complexity of the heat pump system is increased, but once the multi-way solenoid valve fails, the heat pump system will be paralyzed and unusable. At the same time, the coordination of the multi-way solenoid valve and multiple heat exchangers will also cause a significant increase in the overall manufacturing cost of the heat pump system.

[0042] In addition, to ensure good performance in low temperature environments, when starting at low temperatures (for example, operating in an environment of -7°C or -12°C), current heat pump systems generally have low low-temperature operating boundaries. For example, the fluidity of the refrigerant is affected by temperature, resulting in increased viscosity. When the compressor is started cold, the refrigerant viscosity is too high, which will cause the compressor starting load to increase. Therefore, many heat pump systems must also rely on PTC electric heaters to assist the compressor, or use PTC heaters alone to achieve heating functions. In addition, general heat pump systems are equipped with 5kw or 7kw PTC electric heaters, further increasing product costs.

[0043] For this, see Figures 1 to 9 As shown, an embodiment of the present application provides a heat pump system 10, which includes a heat pump device 100, a refrigeration component 200, a heat exchange component 300 and a switching component 400; the heat pump device 100 includes a compressor 110, a condenser 120 and a heating component 130, the condenser 120 is connected to the compressor 110, and the heating component 130 is connected to the condenser 120 to form a first circuit; the refrigeration component 200 is respectively connected to the compressor 110 and the condenser 120 to form a second circuit; the heat exchange component 300 is respectively connected to the compressor 110 and the condenser 120 to form a third circuit; the switching component 400 is respectively connected to the second circuit and the third circuit, and the switching component 400 is at least partially connected to the heat exchange component 300 and the compressor 110 to form a fourth circuit; the switching component 400 is used to control the flow of the second circuit, the third circuit and the fourth circuit.

[0044] When using the heat pump system 10 of this embodiment, the refrigeration function of the heat pump system 10 can be realized by connecting the second circuit, and the heat exchange function of the heat pump system 10 can be realized by connecting the third circuit. At this time, the heat pump system 10 can be used to dissipate heat for external components that need heat dissipation, and the heating function of the heat pump system 10 can be realized by connecting the first circuit. By connecting the second circuit and the third circuit, the refrigeration and heat exchange functions of the heat pump system 10 can be realized at the same time, for example, it can be used for refrigeration and heat dissipation functions in vehicles; when the heat pump system 10 is operating in a low-temperature environment, the switching component 400 is connected to the fourth circuit, and the cold start operation of the compressor 110 can be realized in a low-temperature environment without the need for an additional heat source, thereby improving the operating performance of the heat pump system 10 in a low-temperature environment.

[0045] In addition, in this embodiment, when the heat pump system 10 is cold-started and connected to the fourth circuit, the compressor 110 can also start the bypass mode. At this time, the high-temperature and high-pressure refrigerant output by the compressor 110 can return to the inlet of the compressor 110 only after flowing through the heat exchange component 300, thereby effectively reducing the cold start load of the compressor 110, and the heating function of the heat pump system 10 can be started more quickly under low ambient temperature and without additional heat source. Through the above improvements, compared with the traditional heat pump system, the heat pump system 10 of this embodiment does not need to be additionally provided with a PTC electric heater, thereby achieving the goal of reducing the cost of the electric vehicle heat pump system.

[0046] In the heat pump system 10 of the present embodiment, the switching component 400 is respectively connected to the refrigeration component 200 and the heat exchange component 300 to form a plurality of circuits respectively. Compared with the heat pump system 10 using a multi-way valve in the prior art, the overall structure is simpler. In addition, by setting a fourth circuit in the heat pump system 10, the cold start performance of the compressor 110 in a low temperature environment can be effectively improved without the need for an additional heat source, and the efficiency of the heat pump system 10 entering a normal operating state can be improved. The use effect is good, and the overall cost of the heat pump system 10 is also reduced.

[0047] It should be noted that, in this embodiment, by setting the switching component 400 to be connected to the second circuit, the third circuit and the fourth circuit respectively, the switching component 400 can not only control the flow of each circuit, but also control the on and off of each circuit, and can also connect at least two circuits at the same time to achieve the preset function. The specific adjustment method will be described in detail below. In addition, the compressor 110 can be an electric compressor powered by electrical energy.

[0048] Specifically, see Figure 1 As shown, the switching component 400 includes a first expansion valve 410. The first expansion valve 410, the compressor 110 and the heat exchange component 300 are sequentially connected to form a fourth loop. The first expansion valve 410 is used to control the flow of the fourth loop.

[0049] In this embodiment, by setting the first expansion valve 410 between the compressor 110 and the heat exchange component 300, when the heat pump system 10 needs to be cold-started, the switching component 400 can adjust the flow of the second circuit and the third circuit to 0, and only open the first expansion valve 410. At this time, the high-pressure and high-temperature medium output by the compressor 110 can be returned to the compressor 110 only through the heat exchange component 300, with a simple structure and high regulation efficiency. With this arrangement, the heat pump system 10 can achieve cold start without the need for an additional PTC heater, thereby achieving the purpose of reducing the manufacturing cost of the heat pump system 10.

[0050] It should be noted that in order to improve the cold start efficiency of the compressor 110 more quickly, when the medium flows through the heat exchange component 300, the heat exchange component 300 can cut off or weaken the heat exchange energy with the outside and retain the temperature and pressure performance of the medium as much as possible.

[0051] In one embodiment, the heat pump system 10 also includes a control module, or the heat pump device 100, the refrigeration component 200, the heat exchange component 300 and the switching component 400 are connected to an external control module through a signal, and the first expansion valve 410 can be optionally an electronic expansion valve. By adjusting the first expansion valve 410 through the control module, the flow of the pipeline connected to the first expansion valve 410 can be adjusted.

[0052] Specifically, the control module can be, but is not limited to, various PLCs (Programmable Logic Controller), STM32 (STM32 microcontroller, a 32-bit microcontroller with an ARM Cortex-M core), single-chip microcomputers, FPGAs (Field Programmable Gate Array), ARMs (ARM processors, Advanced RISC Machines), etc., which are used to directly control the heat pump system 10 and obtain the operating status of the heat pump system 10.

[0053] In one embodiment, the refrigeration assembly 200 includes an evaporator 210 , and the evaporator 210 is respectively connected to the condenser 120 and the compressor 110 to form a second circuit.

[0054] In this embodiment, by setting an evaporator 210 in the second circuit, the evaporator 210 can be used to absorb heat and change the refrigerant into a low-temperature and low-pressure gaseous refrigerant in the process of passing through the evaporator 210, and finally return to the air intake of the compressor 110; when the evaporator 210 is connected to the external environment or the in-vehicle environment, the surrounding air can be cooled to realize the refrigeration function of the heat pump system 10.

[0055] Furthermore, the refrigeration assembly 200 further includes a blower 220 , which is connected to the evaporator 210 and is used to drive air flow relative to the evaporator 210 .

[0056] In this configuration, when the evaporator 210 absorbs heat and performs cooling, the gas can be driven to flow relative to the evaporator 210 by starting the blower 220. After the gas flows through the fins of the evaporator 210, the gas can be absorbed by the evaporator 210 and cooled. Finally, the gas flows in a preset direction driven by the blower 220 to realize the cooling function of the heat pump system 10.

[0057] In one embodiment, the refrigeration assembly 200 further includes a one-way valve 230 , which is connected to the evaporator 210 and the compressor 110 , respectively, and the flow direction of the one-way valve 230 is from the evaporator 210 toward the compressor 110 .

[0058] In this embodiment, by setting a one-way valve 230 between the evaporator 210 and the compressor 110, the one-way valve 230 can control the flow direction of the refrigerant in the second circuit, so that the refrigerant output by the evaporator 210 flows toward the compressor 110 along a preset path, thereby avoiding the refrigerant backflow; specifically, when the switching component 400 is connected to the second circuit and the third circuit at the same time, since there is also refrigerant transported to the compressor 110 in the third circuit, by setting a one-way valve 230 in the second circuit, the refrigerant in the third circuit can be avoided from flowing back into the evaporator 210.

[0059] Specifically, see Figure 3 As shown, the heat exchange component 300 includes a heat exchanger 310 and a heat exchange pipeline 320. The heat exchanger 310 is respectively connected to the switching component 400 and the compressor 110; the heat exchange pipeline 320 is respectively connected to the heat exchanger 310 and an external heat exchange element, and the heat exchange pipeline 320 is used to transport a heat exchange cooling medium.

[0060] When using the heat exchange component 300 of this embodiment, after the high-temperature and high-pressure gas refrigerant discharged from the compressor 110 passes through the first expansion valve 410, the first expansion valve 410 can throttle the refrigerant to change it into a high-temperature and low-pressure gas. The heat in the external environment or the external heat exchange element can be transferred to the heat exchanger 310 through the heat exchange cooling medium in the heat exchange pipeline 320, and finally the high-temperature and low-pressure refrigerant is transported back to the compressor 110 through the heat exchanger 310, thereby completing the circulation of the fourth circuit; when the third circuit is started, the refrigerant output by the condenser 120 can also be returned to the compressor 110 through the heat exchange component 300.

[0061] Further, see Figure 1 As shown, the heat pump device 100 also includes a high-pressure liquid storage tank 140 and a cooling component 150, one end of the high-pressure liquid storage tank 140 is connected to the condenser 120, and the other end of the high-pressure liquid storage tank 140 is respectively connected to the refrigeration component 200 and the heat exchange component 300; the cooling component 150 is respectively connected to the condenser 120 and the high-pressure liquid storage tank 140, and the cooling component 150 is used to cool the condenser 120 and / or the high-pressure liquid storage tank 140, and the cooling component 150 is used to liquefy the cooling medium passing through the high-pressure liquid storage tank 140.

[0062] In this embodiment, the refrigerant is changed into a medium-temperature and high-pressure liquid refrigerant after passing through the condenser 120. When the liquid refrigerant passes through the high-pressure liquid storage tank 140, the cooling component 150 can cool the high-pressure liquid storage tank 140 and / or the condenser 120, and cool the refrigerant passing through the high-pressure liquid storage tank 140 into a supercooled state, so as to facilitate the subsequent transportation of the refrigerant to realize the refrigeration or cooling function of the heat pump system 10.

[0063] Specifically, the heating component 130 includes a heater core, a heater pipeline and a heater drive pump. The heater core is connected to the condenser 120 via the heater pipeline. The heater drive pump is arranged on the heater pipeline and is used to drive the heater medium to be transported between the heater core and the condenser 120.

[0064] According to the configuration, the heater core can be connected to the cooling component 150 via a heater pipeline, and a heater drive pump is arranged on the heater pipeline, and drives the heater medium to be transported between the cooling component 150 and the heater core; thus, the heat in the cooling component 150 can be conducted to the heater core via the heater medium, and the heater core can be cooperated with other types of airflow drive elements such as a blower, so that the airflow absorbs the heat of the heater core and finally outputs hot air, thereby realizing the heating function of the heat pump system 10.

[0065] See also Figure 1 As shown, in one embodiment, the switching component 400 includes a second expansion valve 420, a third expansion valve 430 and a fourth expansion valve 440, the second expansion valve 420 is arranged between the heat pump device 100 and the refrigeration component 200 and is used to control the flow of the second circuit; the third expansion valve 430 is arranged between the heat pump device 100 and the heat exchange component 300 and is used to control the flow of the third circuit; the fourth expansion valve 440 is arranged between the condenser 120 and the compressor 110.

[0066] In this embodiment, by setting the second expansion valve 420, the on-off of the second circuit can be controlled, and the refrigerant transported by the heat pump device 100 toward the refrigeration component 200 can be transformed and / or the state can be adjusted; by setting the third expansion valve 430, the refrigerant transported by the heat pump device 100 toward the heat exchange component 300 can be transformed and / or the state can be adjusted; by setting the fourth expansion valve 440 to cooperate with the first expansion valve 410, the refrigerant output by the compressor 110 can be transported only toward the heat exchange component 300, and the fourth expansion valve 440 can transform the pressure and / or adjust the state of the refrigerant transported along the fourth circuit; the specific adjustment mode of the switching component 400 is detailed below. In addition, in this embodiment, the second expansion valve 420, the third expansion valve 430 and the fourth expansion valve 440 can be electronic expansion valves and the signals are connected to the control module, and the control function of the switching component 400 can be realized by sending a control signal by the control module.

[0067] Heat pump system 10 usage modes explained:

[0068] See also Figure 4 As shown, when the heat pump system 10 starts the first cooling mode, the first expansion valve 410 and the third expansion valve 430 are closed, and the second circuit remains unobstructed; the refrigerant is output from the compressor 110 and is in a high-temperature and high-pressure gaseous state. When the refrigerant output by the compressor 110 passes through the fourth expansion valve 440, the fourth expansion valve 440 is fully opened and causes the refrigerant to change into a medium-temperature and high-pressure liquid state after passing through the condenser 120. When the liquid refrigerant passes through the high-pressure liquid storage tank 140, the cooling pipeline of the cooling component 150 will transport the cooling medium to the condenser 120 and the high-pressure liquid storage tank 140 respectively, and cool both of them, so that the refrigerant in the high-pressure liquid storage tank 140 is cooled to a supercooled state; at this time, the heat pump device 100 has completed the initial treatment of the refrigerant.

[0069] The refrigerant after the initial treatment then passes through the second expansion valve 420. The second expansion valve 420 can adjust its opening according to the preset system temperature of the heat pump system 10, and the refrigerant is changed into a low-temperature and low-pressure two-phase state under the throttling effect. The two-phase refrigerant is changed into a low-temperature and low-pressure gaseous refrigerant after passing through the evaporator 210 and finally returns to the air intake of the compressor 110 through the one-way valve 230; at this time, the air can be heat exchanged with the evaporator 210 and cold air can be output by starting the blower 220;

[0070] In addition, in some embodiments, the first cooling mode can also realize a dehumidification function; for example, when the heat pump system 10 is in spring and autumn with a high ambient temperature, the heat pump heating function of the heat pump system 10 can be realized by starting the heating component 130.

[0071] See also Figure 5 As shown, when the heat pump system 10 starts the second cooling mode, the first expansion valve 410 and the second expansion valve 420 are closed, and the third circuit remains unobstructed;

[0072] The difference between this mode and the first cooling mode is that the refrigerant after the initial treatment passes through the third expansion valve 430. The third expansion valve 430 can adjust its opening according to the preset system temperature of the heat pump system 10, and make the refrigerant become a low-temperature and low-pressure two-phase state under the throttling effect. The two-phase refrigerant is changed into a low-temperature and low-pressure gaseous refrigerant after passing through the heat exchanger 310 and finally returns to the suction port of the compressor 110; at this time, the external heat exchange elements such as the battery 20 can be cooled through the heat exchanger 310 through the heat exchange pipeline 320.

[0073] See also Figure 6 , when the heat pump system 10 starts the first heating mode, the second expansion valve 420, the third expansion valve 430 and the fourth expansion valve 440 are closed, and the fourth circuit remains unobstructed;

[0074] This mode is usually applied when the ambient temperature is low (for example, when operating in an environment of -7°C or -12°C). The heat pump system 10 is usually unable to effectively absorb ambient heat and water circuit heat. At this time, it is necessary to start the bypass mode of the compressor 110. The high-temperature and high-pressure gas refrigerant discharged by the compressor 110 is delivered to the first expansion valve 410, and becomes a high-temperature and low-pressure gas after the throttling effect of the first expansion valve 410, and then returns to the air intake of the compressor 110 after passing through the heat exchanger 310. In this way, the refrigerant entering the air intake of the compressor 110 is in a high-temperature and low-pressure gaseous state. Therefore, the compressor 110 can reach the cold start operating condition in a low-temperature environment through the bypass mode of the compressor 110. When the heat pump system 10 runs for a preset time and completes heating of the refrigerant, the heat pump system 10 can enter a normal operating state.

[0075] See also Figure 7 When the heat pump system 10 starts the second heating mode, the second expansion valve 420 is closed, and the third circuit and the fourth circuit remain unobstructed; the operating condition of this mode is usually after the first heating mode runs for a preset time, when the refrigerant in the heat pump system 10 has established stable system high and low pressures.

[0076] The difference between this mode and the second cooling mode is that in this mode, the refrigerant output by the compressor 110 has two paths, one of which passes through the compressor 110, the condenser 120 and the high-pressure liquid storage tank 140 in sequence and the refrigerant is initially treated. After the cooling component 150 absorbs heat, the warm air medium is transported to the warm air core through the warm air pipeline along the first circuit. At this time, the warm air medium can transfer the heat in the warm air medium to the warm air core, so that the heat pump heating function of the heat pump system 10 can be realized; the other refrigerant is transported to the heat exchange component 300 through the first expansion valve 410, and after merging with the refrigerant output from the third expansion valve 430, it is transported to the heat exchanger 310 together. The subsequent operating principle is the same as that of the first heating mode, which will not be repeated here.

[0077] See also Figure 8 When the heat pump system 10 starts the third heating mode, the first expansion valve 410 and the second expansion valve 420 are closed, and the third circuit remains unobstructed; the operating condition of this mode is usually when the heat pump system 10 receives a high amount of heat or the external ambient temperature is high.

[0078] The difference between this mode and the second heating mode is that the heat exchanger 310 absorbs external heat such as the battery 20 and the external environment and conducts it to the refrigerant in the heat exchanger 310. Compared with the second heating mode, since the heat pump system 10 absorbs external heat, the operating power of the compressor 110 can be reduced. Generally, the third heating mode is also the operating condition when the heat pump system 10 is applied to equipment such as vehicles.

[0079] See also Fig. 9, when the heat pump system 10 starts the dehumidification mode, the first expansion valve 410 is closed, and the second circuit, the third circuit and the fourth circuit remain unobstructed;

[0080] This mode combines the operating states of the first cooling mode and the second cooling mode, and the difference between this mode and the first cooling mode is that the heating effect of the heat pump system 10 can be achieved by keeping the fourth circuit normally; at the same time, the heat exchanger 310 can also absorb external heat of the heat pump system 10.

[0081] In addition, in some embodiments, the dehumidification mode can also realize the combined function of the first cooling mode and the second cooling mode, that is, the air conditioning cooling and battery cooling functions of the heat pump system 10 are realized at the same time. At this time, the fourth circuit is closed, and by starting the heat pump system 10, the refrigerant transported along the second circuit can output cold air through the refrigeration component 200 for cooling, and the refrigerant transported along the third circuit can dissipate heat to external heat exchange elements such as batteries 20 through the heat exchange component 300.

[0082] The present invention further provides a vehicle, which includes the heat pump system 10 according to any one of the above embodiments.

[0083] It can be understood that in the vehicle of the present embodiment, by setting the heat pump system 10 in any of the above-mentioned embodiments, the heat pump system 10 in the present embodiment is connected to the refrigeration component 200 and the heat exchange component 300 respectively through the switching component 400 to form a plurality of circuits respectively. Compared with the heat pump system 10 using a multi-way valve in the prior art, the overall structure is simpler; in addition, by setting the fourth circuit in the heat pump system 10, the cold start performance of the compressor 110 in a low temperature environment can be effectively improved without the need for an additional heat source, and the efficiency of the heat pump system 10 entering a normal operating state can be improved, the use effect is good, and the overall cost of the heat pump system 10 is also reduced.

[0084] Specifically in one embodiment, the vehicle further includes a battery 20 , and the heat exchange assembly 300 is coupled to the battery 20 and is used for heat exchange with the battery 20 .

[0085] In this embodiment, the vehicle may be an electric vehicle, and the heat pump system 10 is used to cool the battery 20; the heat exchanger 310 may be a chiller heat exchanger. Of course, in some embodiments, the vehicle may also be an electric scooter, an electric power-assisted vehicle, or other vehicle that uses a power battery as a power source. Since the power source generates heat when supplying energy, the heat pump system 10 in any of the above embodiments is provided to cooperate with the battery 20.

[0086] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Wherein, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the present invention.

[0087] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive.

[0088] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A heat pump system (10), characterized in that: include: A heat pump device (100) comprises a compressor (110), a condenser (120) and a heating component (130), wherein the condenser (120) is connected to the compressor (110), and the heating component (130) is connected to the condenser (120) to form a first loop; A refrigeration component (200) is respectively connected to the compressor (110) and the condenser (120) to form a second circuit; a heat exchange component (300), connected to the compressor (110) and the condenser (120) respectively to form a third loop; and A switching component (400) is connected to the second circuit and the third circuit respectively, and the switching component (400) is at least partially connected to the heat exchange component (300) and the compressor (110) to form a fourth circuit; the switching component (400) is used to control the flow of the second circuit, the third circuit and the fourth circuit.

2. The heat pump system (10) according to claim 1, characterized in that: The switching component (400) comprises a first expansion valve (410), wherein the first expansion valve (410), the compressor (110) and the heat exchange component (300) are sequentially connected to form the fourth circuit, and the first expansion valve (410) is used to control the flow of the fourth circuit.

3. The heat pump system (10) according to claim 2, characterized in that: The heat exchange component (300) comprises a heat exchanger (310) and a heat exchange pipeline (320), wherein the heat exchanger (310) is respectively connected to the switching component (400) and the compressor (110); the heat exchange pipeline (320) is respectively connected to the heat exchanger (310) and an external heat exchange element, and the heat exchange pipeline (320) is used to transport a heat exchange cooling medium.

4. The heat pump system (10) according to claim 1, characterized in that: The refrigeration assembly (200) comprises an evaporator (210), and the evaporator (210) is respectively connected to the condenser (120) and the compressor (110) to form the second circuit.

5. The heat pump system (10) according to claim 4, characterized in that: The refrigeration assembly (200) further comprises a blower (220), wherein the blower (220) is connected to the evaporator (210) and is used to drive air flow relative to the evaporator (210).

6. The heat pump system (10) according to claim 1, characterized in that: The heat pump device (100) further comprises a high-pressure liquid storage tank (140) and a cooling assembly (150); one end of the high-pressure liquid storage tank (140) is connected to the condenser (120), and the other end of the high-pressure liquid storage tank (140) is respectively connected to the refrigeration assembly (200) and the heat exchange assembly (300); the cooling assembly (150) is respectively connected to the condenser (120) and the high-pressure liquid storage tank (140), and the cooling assembly (150) is used to cool the condenser (120) and / or the high-pressure liquid storage tank (140), and the cooling assembly (150) is used to liquefy the cooling medium passing through the high-pressure liquid storage tank (140).

7. The heat pump system (10) according to claim 1, characterized in that: The heating component (130) comprises a warm air core, a warm air pipeline and a warm air driving pump, the warm air core is connected to the condenser (120) via the warm air pipeline, and the warm air driving pump is arranged on the warm air pipeline and is used to drive the warm air medium to be transported between the warm air core and the condenser (120).

8. The heat pump system (10) according to any one of claims 1 to 7, characterized in that: The switching component (400) comprises a second expansion valve (420), a third expansion valve (430) and a fourth expansion valve (440); the second expansion valve (420) is arranged between the heat pump device (100) and the refrigeration component (200) and is used to control the flow of the second circuit; the third expansion valve (430) is arranged between the heat pump device (100) and the heat exchange component (300) and is used to control the flow of the third circuit; the fourth expansion valve (440) is arranged between the condenser (120) and the compressor (110).

9. A vehicle, characterized in that: The heat pump system (10) comprises the heat pump system (10) according to any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle further comprises a battery (20), and the heat exchange component (300) is coupled to the battery (20) and is used for heat exchange with the battery (20).

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