Refrigerant loop, thermal management system, control method and vehicle

Abstract

The invention relates to a refrigerant loop, a heat management system, a control method and a vehicle and relates to the technical field of air conditioners, and the refrigerant loop comprises a compressor, a condenser, a first flow regulating valve, a heat exchanger, a second flow regulating valve, an evaporation coil and a gas-liquid separator; the first end of the compressor is connected with the first end of the condenser, the second end of the condenser is connected with the first end of an evaporation coil in the refrigerator through the first flow adjusting valve, the heat exchanger and the second flow adjusting valve, the second end of the evaporation coil is connected with the first end of the gas-liquid separator, and the second end of the gas-liquid separator is connected with the second end of the compressor. According to the vehicle-mounted refrigerator, the vehicle-mounted refrigerator is coupled with the vehicle-mounted thermal management system, refrigeration of the vehicle-mounted refrigerator is achieved through the refrigerant loop in the vehicle-mounted thermal management system, so that components such as a compressor and a condenser in the vehicle-mounted refrigerator are omitted, the cost and the weight of the vehicle-mounted refrigerator are reduced, and the noise problem of the vehicle-mounted refrigerator in a vehicle can be obviously solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a refrigerant circuit, a thermal management system, a control method and a vehicle. BACKGROUND

[0002] The air conditioner provides refrigeration or heating functions in the thermal management system of an automobile, and the thermal management system adopts a direct heat pump system or an indirect heat pump system.

[0003] At present, whether it is a single air conditioner system of a new energy automobile, or a more complex heat pump system, or a pure electric heat pump system architecture, it is usually two completely independent parallel systems with a vehicle-mounted refrigerator, and the vehicle-mounted refrigerator contains independent components such as compressors and condensers. However, this will increase the cost and weight of the vehicle-mounted refrigerator, and the vehicle-mounted refrigerator is usually placed in the passenger cabin, and these components will also produce obvious noise when running, affecting the comfort of the passengers in the cabin. SUMMARY

[0004] Therefore, the present application provides a refrigerant circuit, a thermal management system, a control method and a vehicle for a vehicle, mainly aiming to improve the technical problems that the current prior art will increase the cost and weight of the vehicle-mounted refrigerator, and also produce obvious noise.

[0005] In a first aspect, the present application provides a refrigerant circuit, comprising: a compressor, a condenser, a first flow regulating valve, a heat exchanger, a second flow regulating valve, an evaporative coil and a gas-liquid separator;

[0006] The first end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the first flow regulating valve, the second end of the first flow regulating valve is connected to the first end of the heat exchanger, the second end of the heat exchanger is connected to the first end of the second flow regulating valve, the second end of the second flow regulating valve is connected to the first end of the evaporative coil, the second end of the evaporative coil is connected to the first end of the gas-liquid separator, and the second end of the gas-liquid separator is connected to the second end of the compressor.

[0007] The evaporative coil is arranged in the vehicle-mounted refrigerator and is used for refrigerating the vehicle-mounted refrigerator.

[0008] In a second aspect, the present application provides a thermal management system, comprising: the refrigerant circuit of the first aspect and a cooling liquid circuit, wherein the refrigerant circuit is coupled to the cooling liquid circuit.

[0009] In a third aspect, the present application provides a thermal management system control method, applied to the thermal management system of the second aspect, comprising:

[0010] open the target electronic expansion valve in the refrigerant circuit in response to the control instruction of the thermal management system;

[0011] controlling the target electronic water pump in the cooling liquid circuit to operate, and opening the target electronic expansion valve in the cooling liquid circuit, wherein the target electronic water pump comprises one or more of a first electronic water pump and a second electronic water pump, and the target electronic expansion valve comprises one or more of a first flow regulating valve, a second flow regulating valve, a third flow regulating valve, a fourth flow regulating valve, a first electronic three-way valve, a second electronic three-way valve, and an electronic four-way valve.

[0012] In a fourth aspect, the present application provides a vehicle, comprising the thermal management system according to the second aspect.

[0013] By means of the above technical solution, the present application provides a refrigerant circuit for a vehicle, a thermal management system, a control method, and a vehicle, wherein the refrigerant circuit comprises a compressor, a condenser, a first flow regulating valve, a heat exchanger, a second flow regulating valve, an evaporating coil, and a gas-liquid separator; specifically, a first end of the compressor is connected with a first end of the condenser, a second end of the condenser is connected with a first end of the first flow regulating valve, a second end of the first flow regulating valve is connected with a first end of the heat exchanger, a second end of the heat exchanger is connected with a first end of the second flow regulating valve, a second end of the second flow regulating valve is connected with a first end of the evaporating coil, a second end of the evaporating coil is connected with a first end of the gas-liquid separator, and a second end of the gas-liquid separator is connected with a second end of the compressor; wherein the evaporating coil is arranged in a vehicle-mounted refrigerator, and is used for refrigerating the vehicle-mounted refrigerator. Compared with the prior art, the present application designs a novel refrigerant circuit for a vehicle, couples the vehicle-mounted refrigerator with the whole-vehicle air conditioning system, uses the refrigerant circuit in the whole-vehicle air conditioning system to realize refrigeration of the vehicle-mounted refrigerator, saves the compressor, the condenser, and other components in the vehicle-mounted refrigerator, thereby saving the cost and weight of the vehicle-mounted refrigerator, and significantly improving the noise problem of the vehicle-mounted refrigerator in the vehicle, and improving the comfort of passengers in the cabin.

[0014] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the present application, and together with the specification serve to explain the principles of the present application.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0017] Figure 1 A structural schematic diagram of a thermal management system provided by an embodiment of the present application is shown.

[0018] Figure 2 A structural schematic diagram of a vehicle-mounted refrigerator provided by an embodiment of the present application is shown.

[0019] Figure 3 A flow schematic diagram of a thermal management system control method provided by an embodiment of the present application is shown.

[0020] Figure 4 A schematic diagram of a thermal management system provided by an embodiment of the present application in a running mode is shown.

[0021] Figure 5 A schematic diagram of a thermal management system provided by an embodiment of the present application in a running mode is shown.

[0022] Figure 6 A schematic diagram of a thermal management system provided by an embodiment of the present application in a running mode is shown.

[0023] Figure 7 A schematic diagram of a thermal management system provided by an embodiment of the present application in a running mode is shown.

[0024] Reference signs

[0025] Compressor 1101; condenser 1102; first flow regulating valve 1103; heat exchanger 1104; second flow regulating valve 1105; evaporating coil 1106; gas-liquid separator 1107; third flow regulating valve 1108; evaporator 1109; one-way valve 1110; fourth flow regulating valve 1111; cooler 1112; refrigerant device 1113; air blower 1114; first PT sensor 1115; second PT sensor 1116; third PT sensor 1117; fourth PT sensor 1118; fifth PT sensor 1119; sixth PT sensor 1120; electronic four-way valve 1201; first electronic water pump 1202; water heater 1203; battery 1204; first electronic three-way valve 1205; second electronic water pump 1206; motor and control all-in-one machine 1207; radiator 1208; second electronic three-way valve 1209; first water temperature sensor 1210, second water temperature sensor 1211, third water temperature sensor 1212. DETAILED DESCRIPTION

[0026] In order to enable more clear understanding of the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In order to improve the technical problems that the current prior art causes the cost and weight of the vehicle refrigerator to increase and also causes obvious noise. The present embodiment provides a refrigerant circuit 11 for a vehicle, as shown in Figure 1 The refrigerant circuit 11 includes a compressor 1101, a condenser 1102, a first flow regulating valve 1103, a heat exchanger 1104, a second flow regulating valve 1105, an evaporating coil 1106 and a gas-liquid separator 1107; a first end of the compressor 1101 is connected with a first end of the condenser 1102, a second end of the condenser 1102 is connected with a first end of the first flow regulating valve 1103, a second end of the first flow regulating valve 1103 is connected with a first end of the heat exchanger 1104, a second end of the heat exchanger 1104 is connected with a first end of the second flow regulating valve 1105, a second end of the second flow regulating valve 1105 is connected with a first end of the evaporating coil 1106, a second end of the evaporating coil 1106 is connected with a first end of the gas-liquid separator 1107, and a second end of the gas-liquid separator 1107 is connected with a second end of the compressor 1101; wherein the evaporating coil 1106 is arranged in the vehicle refrigerator and is used for refrigerating the vehicle refrigerator.

[0028] In some examples, the condenser 1102 can convert the high-temperature and high-pressure refrigerant pumped out by the compressor 1101 from gas state to liquid state, so that the liquefied refrigerant can continue to circulate in the system, and also can be used for heating the passenger compartment by heat exchange with the refrigerant. The gas-liquid separator 1107 is mainly used for separating the gaseous refrigerant and the liquid refrigerant, and also can be used for storing the refrigerant.

[0029] Compared with the current prior art, the present embodiment provides a refrigerant circuit 11, as shown in Figure 1 The refrigerant circuit 11 in the thermal management system of the present application is obtained by connecting the compressor 1101, the condenser 1102, the first flow regulating valve 1103, the heat exchanger 1104, the second flow regulating valve 1105, the evaporating coil 1106 and the gas-liquid separator 1107 in series. In this way, by coupling the vehicle refrigerator with the whole vehicle air conditioning system, the refrigeration demand of the vehicle refrigerator is realized by using the components such as the compressor and the condenser in the whole vehicle air conditioning thermal management system, which reduces the cost, weight and space demand of the vehicle refrigerator, also reduces the power consumption and noise problem caused by the independent compressor in the vehicle refrigerator, and improves the energy efficiency of the whole vehicle air conditioning thermal management system.

[0030] Furthermore, as a refinement and extension of the above embodiment, Figure 1 As shown, the refrigerant circuit 11 may also include: a third flow regulating valve 1108, an evaporator 1109, and a one-way valve 1110; the pipeline between the heat exchanger 1104 and the second flow regulating valve 1105 is provided with a first intermediate pipe port, the pipeline between the evaporating coil 1106 and the gas-liquid separator 1107 is provided with a second intermediate pipe port, and the third flow regulating valve 1108, the evaporator 1109 and the one-way valve 1110 are provided between the first intermediate pipe port and the second intermediate pipe port. The second end of the heat exchanger 1104 is connected to the first end of the third flow regulating valve 1108, the second end of the third flow regulating valve 1108 is connected to the first end of the evaporator 1109, the second end of the evaporator 1109 is connected to the first end of the one-way valve 1110, and the second end of the one-way valve 1110 is connected to the first end of the gas-liquid separator 1107.

[0031] For example, in this embodiment, the evaporator 1109 in the vehicle air-conditioning system is connected in parallel with the vehicle refrigerator to couple the vehicle refrigerator with the vehicle air-conditioning system, wherein the evaporator 1109 can achieve the purpose of cooling the passenger compartment and the vehicle refrigerator by exchanging heat with the coolant.

[0032] Optionally, the refrigerant circuit 11 may also include: a fourth flow regulating valve 1111 and a cooler 1112 (chiller); a fourth flow regulating valve 1111 and a cooler 1112 are arranged between the first intermediate pipe port and the second intermediate pipe port, the second end of the heat exchanger 1104 is connected to the first end of the fourth flow regulating valve 1111, the second end of the fourth flow regulating valve 1111 is connected to the first end of the cooler 1112, and the second end of the cooler 1112 is connected to the first end of the gas-liquid separator 1107.

[0033] In some examples, the fourth flow regulating valve 1111 is mainly used to regulate the flow of refrigerant entering the cooler 1112 , and the cooler 1112 is mainly used to cool and heat the battery 1204 in the coolant circuit 12 .

[0034] Optionally, the vehicle refrigerator may further include: a refrigerant device 1113 and a blower 1114; the evaporating coil 1106 is arranged between the refrigerant device 1113 and the blower 1114, and the refrigerant device 1113 and the blower 1114 are used to cool the vehicle refrigerator when the compressor 1101 in the refrigerant circuit 11 stops working.

[0035] Exemplarily, in the coupling system of the vehicle-mounted refrigerator and the whole-vehicle air conditioner thermal management system, the compressor 1101 of the whole-vehicle air conditioner has strong refrigeration capacity, and even when the compressor 1101 runs at the minimum speed, the refrigeration capacity is much greater than the refrigeration demand of the refrigerator, resulting in that the compressor 1101 is frequently started and stopped when it only serves the refrigerator refrigeration in the working condition of the vehicle in a stationary state without the air conditioner being turned on, thereby affecting the service life of the compressor 1101. Therefore, a cold carrier device 1113 is arranged in the vehicle-mounted refrigerator to increase the load of the refrigerator, and the cold carrier device 1113 can provide refrigeration capacity for the refrigerator when the compressor 1101 stops working. As shown in FIG. 11, the vehicle-mounted refrigerator mainly includes an evaporating coil 1106, a blower 1114, a cold carrier device 1113, a vehicle-mounted storage space, and a corresponding circulating air duct, etc. The circulating air is cooled by the low-temperature refrigerant flowing in the evaporating coil 1106, and the circulating cold air cools the cold carrier, and then cools the space of the vehicle-mounted refrigerator through the circulating air duct, and then returns to the blower 1114 through the circulating air duct to complete the circulation of the cooling air. When the refrigerant in the evaporating coil 1106 does not flow and loses the refrigeration function, the vehicle-mounted refrigerator can release cold energy through the cold carrier to reduce the frequent start and stop of the compressor 1101. Through the combination of natural circulating air and the cold carrier device 1113, especially in the high-temperature exposure parking working condition in summer, the risk of loss or weakening of the refrigeration function of the vehicle-mounted refrigerator is avoided. Figure 2

[0036] In some examples, the refrigerant circuit 11 can further include a first PT sensor 1115, a second PT sensor 1116, a third PT sensor 1117, a fourth PT sensor 1118, a fifth PT sensor 1119, and a sixth PT sensor 1120. The PT sensor can detect the temperature data at the position where it is located in real time, and convert it into an electrical signal and record it for further data processing, analysis and control system decision-making. In this embodiment, the PT sensor can be used to monitor the temperature of the compressor 1101 and the electronic expansion valve in the refrigerant circuit 11, so that the control system controls these components according to the temperature data.

[0037] Further, based on the above-mentioned refrigerant circuit 11, the present embodiment further proposes a thermal management system, which includes the refrigerant circuit 11 and the coolant circuit 12, wherein the refrigerant circuit 11 is coupled with the coolant circuit 12.

[0038] ​Optionally, the cooling liquid circuit 12 comprises: an electronic four-way valve 1201, a first electronic water pump 1202, a water heater 1203 (WPTC), a battery 1204, a first electronic three-way valve 1205; the third end of the cooler 1112 is connected with the first end of the electronic four-way valve 1201, the second end of the electronic four-way valve 1201 is connected with the first end of the first electronic water pump 1202, the second end of the first electronic water pump 1202 is connected with the first end of the water heater 1203, the second end of the water heater 1203 is connected with the first end of the battery 1204, the second end of the battery 1204 is connected with the first end of the first electronic three-way valve 1205, the second end of the first electronic three-way valve 1205 is connected with the fourth end of the cooler 1112, and the third end of the first electronic three-way valve 1205 is connected with the pipeline between the water heater 1203 and the battery 1204.

[0039] In the embodiment, in order to better meet the different requirements of the battery 1204 and the air conditioner in heating and cooling conditions, different temperature adjustment of the battery 1204 needs to be realized, and the temperature of the battery 1204 can be adjusted by the cooler 1112 and the water heater 1203 by adopting a relatively independent first electronic water pump 1202, a first electronic three-way valve 1205 and an electronic four-way valve 1201.

[0040] Optionally, the cooling liquid circuit 12 can further comprise: a second electronic water pump 1206, a motor and control all-in-one machine 1207, a radiator 1208, a second electronic three-way valve 1209; the third end of the electronic four-way valve 1201 is connected with the first end of the second electronic water pump 1206, the second end of the second electronic water pump 1206 is connected with the first end of the motor and control all-in-one machine 1207, the second end of the motor and control all-in-one machine 1207 is connected with the first end of the radiator 1208, the second end of the radiator 1208 is connected with the first end of the second electronic three-way valve 1209, the second end of the second electronic three-way valve 1209 is connected with the fourth end of the electronic four-way valve 1201, and the third end of the second electronic three-way valve 1209 is connected with the pipeline between the motor and control all-in-one machine 1207 and the radiator 1208.

[0041] Optionally, the cooling liquid circuit 12 can further comprise: a second electronic water pump 1206, a motor and control all-in-one machine 1207, a radiator 1208, a second electronic three-way valve 1209; the third end of the electronic four-way valve 1201 is connected with the first end of the second electronic water pump 1206, the second end of the second electronic water pump 1206 is connected with the first end of the motor and control all-in-one machine 1207, the second end of the motor and control all-in-one machine 1207 is connected with the first end of the radiator 1208, the second end of the radiator 1208 is connected with the first end of the second electronic three-way valve 1209, the second end of the second electronic three-way valve 1209 is connected with the fourth end of the electronic four-way valve 1201, and the third end of the second electronic three-way valve 1209 is connected with the pipeline between the motor and control all-in-one machine 1207 and the radiator 1208.

[0041] Optionally, the cooling liquid circuit 12 can further comprise: a second electronic water pump 1206, a motor and control all-in-one machine 1207, a radiator 1208, a second electronic three-way valve 1209; the third end of the electronic four-way valve 1201 is connected with the first end of the second electronic water pump 1206, the second end of the second electronic water pump 1206 is connected with the first end of the motor and control all-in-one machine 1207, the second end of the motor and control all-in-one machine 1207 is connected with the first end of the radiator 1208, the second end of the radiator 1208 is connected with the first end of the second electronic three-way valve 1209, the second end of the second electronic three-way valve 1209 is connected with the fourth end of the electronic four-way valve 1201, and the third end of the second electronic three-way valve 1209 is connected with the pipeline between the motor and control all-in-one machine 1207 and the radiator 1208.

[0042] In some examples, the cooling liquid circuit 12 can further include a first water temperature sensor 1210, a second water temperature sensor 1211, and a third water temperature sensor 1212. By arranging the three water temperature sensors, the temperature of the cooling liquid in the battery 1204 sub-circuit and the motor and control all-in-one machine 1207 sub-circuit can be obtained, so that the corresponding heat exchange control can be accurately performed.

[0043] Further, in order to illustrate the processing process of the above-mentioned thermal management system, the embodiment also provides a control method, as shown in the figure, the method comprises: Figure 3

[0044] Step 201, in response to the control instruction of the thermal management system, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened.

[0045] In some examples, the control instruction of the thermal management system can include: an opening instruction of the air conditioner and refrigerator refrigeration mode, an opening instruction of the single air conditioner refrigeration mode, an opening instruction of the single refrigerator refrigeration mode, and an opening instruction of the air conditioner heating and refrigerator refrigeration mode, etc.

[0046] Step 202, control the target electronic water pump in the cooling liquid circuit to run, and open the target electronic expansion valve in the cooling liquid circuit.

[0047] Among them, the target electronic water pump includes one or more of the first electronic water pump 1202 and the second electronic water pump 1206, and the target electronic expansion valve includes one or more of the first flow regulating valve 1103, the second flow regulating valve 1105, the third flow regulating valve 1108, the fourth flow regulating valve 1111, the first electronic three-way valve 1205, the second electronic three-way valve 1209 and the electronic four-way valve 1201. The specific control mode of the target electronic water pump and the target electronic expansion valve in different modes is as follows:

[0048] In some examples, the thermal management system can control the compressor 1101 in the refrigerant circuit 11 to discharge refrigerant and open the electronic expansion valve in response to the opening instruction of the air conditioner and refrigerator refrigeration mode; and control the first electronic water pump 1202 and the second electronic water pump 1206 in the cooling liquid circuit 12 to run, open the first flow regulating valve 1103, the second flow regulating valve 1105, the third flow regulating valve 1108 and the fourth flow regulating valve 1111, the first electronic three-way valve 1205 opens the first end and the second end, the second electronic three-way valve 1209 opens the first end and the second end, and the electronic four-way valve 1201 opens the first end, the second end, the third end and the fourth end.

[0049] For example, as shown in the figure, Figure 4 ​As shown, in the air conditioning and refrigerator cooling mode, the compressor 1101 discharges high-temperature and high-pressure refrigerant gas through the condenser 1102 in the whole-vehicle air conditioning box (at this time, the condenser 1102 does not participate in heat exchange, and only functions as a channel), and the liquid-state refrigerant is condensed, passes through the first flow regulating valve 1103 and the outdoor heat exchanger 1104, and then passes through the third flow regulating valve 1108 and the fourth flow regulating valve 1111, respectively, to throttle the evaporator 1109 and the cooler 1112 in the air conditioning box, and at the same time, the second flow regulating valve 1105 is used to regulate the flow of refrigerant flowing into the vehicle-mounted refrigerator to achieve different refrigeration capacity requirements.

[0050] In some examples, the refrigeration requirement of the vehicle-mounted refrigerator is much lower than that of the automobile air conditioner. In order to further match the adjustment of the load of the vehicle-mounted refrigerator and the whole-vehicle compressor 1101, the vehicle-mounted refrigerator built-in carrier refrigerant device 1113 (the type and form of the carrier refrigerant are matched and selected according to requirements) can increase the refrigeration requirement of the refrigerator, the second flow regulating valve 1105 before the evaporating coil 1106 is adjusted to control the refrigeration capacity of the evaporating coil 1106, and the second flow regulating valve 1105 can be controlled to realize intermittent refrigeration of the vehicle-mounted refrigerator and the carrier refrigerant device 1113, thereby reducing the difficulty of matching the large capacity of the compressor 1101 in the whole-vehicle air conditioning system and the low requirement of the vehicle-mounted refrigerator. During the closing period of the second flow regulating valve 1105, the air in the vehicle-mounted refrigerator can be cooled by the cooling carrier refrigerant to realize the continuous refrigeration function of the vehicle-mounted refrigerator.

[0051] In some embodiments, the thermal management system can control the compressor 1101 in the refrigerant circuit 11 to discharge refrigerant and open the electronic expansion valve in response to a single air conditioning refrigeration mode opening instruction; and control the first electronic water pump 1202 and the second electronic water pump 1206 in the cooling liquid circuit 12 to operate, open the first flow regulating valve 1103, the third flow regulating valve 1108, and the fourth flow regulating valve 1111, the first electronic three-way valve 1205 opens the first end and the second end, the second electronic three-way valve 1209 opens the first end and the second end, and the electronic four-way valve 1201 opens the first end, the second end, the third end, and the fourth end.

[0052] As shown in the example, Figure 5 As shown, in the single air conditioning refrigeration mode, the vehicle-mounted refrigerator enters the closing or heat preservation working condition, and the refrigeration function of the vehicle-mounted refrigerator can be closed by closing the second flow regulating valve 1105 before the evaporating coil 1106 of the vehicle-mounted refrigerator; at this time, the refrigerant flowing out of the evaporator 1109 and / or the cooler 1112 passes through the gas-liquid separator 1107 and the compressor 1101 to realize the whole refrigeration cycle.

[0053] In some embodiments, the thermal management system can control the compressor 1101 in the refrigerant circuit 11 to discharge refrigerant and open the electronic expansion valve in response to an opening instruction of the single-refrigerator refrigeration mode; and control the first electronic water pump 1202 and the second electronic water pump 1206 in the cooling liquid circuit 12 to operate, open the first flow regulating valve 1103, the second flow regulating valve 1105, and the fourth flow regulating valve 1111, the first electronic three-way valve 1205 opens the first end and the second end, the second electronic three-way valve 1209 opens the first end and the second end, and the electronic four-way valve 1201 opens the first end, the second end, the third end, and the fourth end.

[0054] As shown in the example, Figure 6 In the single-refrigerator refrigeration mode, the whole vehicle air conditioner is closed, but the vehicle-mounted refrigerator needs to be opened (for example, the vehicle is stationary, and there is no passenger in the vehicle), at this time, the whole thermal management system operates similarly to the air conditioner and refrigerator refrigeration mode, but in this mode, the third flow regulating valve 1108 before the air conditioner evaporator 1109 is in a closed state. For example, the compressor 1101 operates at the minimum speed, and the high-temperature and high-pressure refrigerant discharged after the outdoor condenser 1102 condenses and the first flow regulating valve 1103 is fully open is throttled through the second flow regulating valve 1105 before the vehicle-mounted refrigerator. At this time, the displacement of the compressor 1101 is relatively large, and it is difficult to match the load demand of the vehicle-mounted refrigerator, especially in the corresponding working condition in spring and autumn, the load demand difference between the vehicle-mounted refrigerator and the minimum displacement of the compressor 1101 is larger, and the vehicle-mounted refrigerator needs to be optimized and designed to reduce the frequent start of the compressor 1101, so as to avoid affecting the service life of the compressor 1101. The refrigerant capacity device 1113 of the vehicle-mounted refrigerator in the embodiment and the start-stop of the compressor 1101 can realize the energy matching of the refrigeration demand of the vehicle-mounted refrigerator.

[0055] In some embodiments, the thermal management system can control the compressor 1101 in the refrigerant circuit 11 to discharge refrigerant and open the electronic expansion valve in response to an opening instruction of the air conditioner heating and refrigerator refrigeration mode; and control the first electronic water pump 1202 and the second electronic water pump 1206 in the cooling liquid circuit 12 to operate, open the first flow regulating valve 1103, the second flow regulating valve 1105, the third flow regulating valve 1108, and the fourth flow regulating valve 1111, the first electronic three-way valve 1205 opens the second end and the third end, the second electronic three-way valve 1209 opens the second end and the third end, and the electronic four-way valve 1201 opens the first end, the second end, the third end, and the fourth end.

[0056] As shown in the example, Figure 7As shown, in the air-conditioning heating and refrigerator refrigeration modes, the compressor 1101 discharges refrigerant that is heat-released in the indoor condenser 1102 to become liquid refrigerant, passes through the throttling function of the first flow regulating valve 1103, then passes through the outdoor heat exchanger 1104 (at this time, the heat exchanger 1104 corresponds to an evaporator, and absorbs heat from the ambient air), then passes through the fourth flow regulating valve 1111 before the cooler 1112 and the second flow regulating valve 1105 before the evaporative coil 1106 (at this time, the second flow regulating valve 1105 is in a full-on mode), and then the refrigerant flows into the evaporative coil 1106 to refrigerate the vehicle-mounted refrigerator, and finally the refrigerant returns to the gas-liquid separator 1107 and the compressor 1101, completing the circulation of the refrigerant in the entire refrigerant circuit 11. When the refrigerant flows in the evaporative coil 1106, it absorbs the heat of the refrigerator air (to cool the air and the refrigerant device 1113 in the refrigerator), and the intermittent opening of the second flow regulating valve 1105 can meet the refrigeration demand of the refrigerator.

[0057] At present, the compressor in the vehicle-mounted refrigerator in the prior art is placed in the vehicle, which will generate obvious noise in the vehicle, affecting the comfort of the passengers in the cabin; the condenser of the vehicle-mounted refrigerator is also in the vehicle, and the heat load generated during the refrigeration process of the refrigerator will be completely transferred to the passenger cabin, and the whole vehicle thermal management system is needed to cool this part of the heat load, resulting in a decrease in the energy efficiency of the whole vehicle. By applying the coupling system of the vehicle-mounted refrigerator and the whole vehicle air-conditioning thermal management system provided in the embodiment, the compressor, the condenser and other components in the whole vehicle air-conditioning thermal management system are used to meet the refrigeration demand of the vehicle-mounted refrigerator, which reduces the cost, weight and space demand of the vehicle-mounted refrigerator, and also reduces the power consumption and noise problem of the independent compressor in the vehicle-mounted refrigerator. At the same time, since the condenser in the whole vehicle thermal management system is used, the vehicle-mounted refrigerator will not heat the vehicle through its own condenser as in the original way, thereby reducing the heat load of the vehicle-mounted refrigerator on the automobile air conditioner, improving the refrigeration energy efficiency, and especially reducing the risk of loss or weakening of the refrigeration function of the vehicle-mounted refrigerator under the high-temperature exposure and other parking conditions in summer.

[0058] Further, the embodiment of the application also provides a vehicle, which can specifically include: Figures 1 to 7 a thermal management system as shown. The vehicle can be a new energy vehicle or a traditional vehicle.

[0059] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0060] The above description is merely that of the specific embodiments of the application and as such is not to be taken in a limiting sense. Various modifications and co nti n uations will be evident to those skilled in the art that do not depart from the spirit and scope of the application as defined by the appended claims. The specific embodiments presented, therefore, are not to be considered in a limiting sense, but are presented for purposes of illustration only in conformance with the above-stated description. It is not the intention to limit the application to the described embodiments but rather the intention is to cover all modifications and alternatives coming within the spirit and scope of the claims.

Claims

1. A refrigerant circuit, characterized in that: Comprise: a compressor, a condenser, a first flow regulating valve, a heat exchanger, a second flow regulating valve, an evaporating coil and a gas-liquid separator; a first end of the compressor is connected with a first end of the condenser, a second end of the condenser is connected with a first end of the first flow regulating valve, a second end of the first flow regulating valve is connected with a first end of the heat exchanger, a second end of the heat exchanger is connected with a first end of the second flow regulating valve, a second end of the second flow regulating valve is connected with a first end of the evaporating coil, a second end of the evaporating coil is connected with a first end of the gas-liquid separator, and a second end of the gas-liquid separator is connected with a second end of the compressor; wherein the evaporating coil is arranged in a vehicle-mounted refrigerator for refrigerating the vehicle-mounted refrigerator.

2. The refrigerant circuit according to claim 1, characterized in that The refrigerant circuit further comprises a third flow regulating valve, an evaporator and a one-way valve. A first intermediate port is arranged in a pipeline between the heat exchanger and the second flow regulating valve, a second intermediate port is arranged in a pipeline between the evaporating coil and the gas-liquid separator, the third flow regulating valve, the evaporator and the one-way valve are arranged between the first intermediate port and the second intermediate port, a second end of the heat exchanger is connected with a first end of the third flow regulating valve, a second end of the third flow regulating valve is connected with a first end of the evaporator, a second end of the evaporator is connected with a first end of the one-way valve, and a second end of the one-way valve is connected with a first end of the gas-liquid separator.

3. The refrigerant circuit according to claim 2, characterized in that The refrigerant circuit further comprises a fourth flow regulating valve and a cooler. The fourth flow regulating valve and the cooler are arranged between the first intermediate port and the second intermediate port, a second end of the heat exchanger is connected with a first end of the fourth flow regulating valve, a second end of the fourth flow regulating valve is connected with a first end of the cooler, and a second end of the cooler is connected with a first end of the gas-liquid separator.

4. The refrigerant circuit according to claim 1, characterized in that The vehicle-mounted refrigerator further comprises a carrier refrigerant device and a blower; The evaporating coil is arranged between the carrier refrigerant device and the blower, and the carrier refrigerant device and the blower are used for refrigerating the vehicle-mounted refrigerator when the compressor in the refrigerant circuit stops working.

5. A thermal management system characterized by, The vehicle-mounted refrigerator comprises the refrigerant circuit and a cooling liquid circuit, and the refrigerant circuit is coupled with the cooling liquid circuit.

6. The thermal management system of claim 5, wherein, The cooling liquid circuit comprises an electronic four-way valve, a first electronic water pump, a water heater, a battery and a first electronic three-way valve. A third end of the cooler is connected with a first end of the electronic four-way valve, a second end of the electronic four-way valve is connected with a first end of the first electronic water pump, a second end of the first electronic water pump is connected with a first end of the water heater, a second end of the water heater is connected with a first end of the battery, a second end of the battery is connected with a first end of the first electronic three-way valve, a second end of the first electronic three-way valve is connected with a fourth end of the cooler, and a third end of the first electronic three-way valve is connected into a pipeline between the water heater and the battery.

7. The thermal management system of claim 6, wherein, The cooling liquid circuit further comprises a second electronic water pump, a motor and a control integrated machine, a radiator, a second electronic three-way valve; The third end of the electronic four-way valve is connected with the first end of the second electronic water pump, the second end of the second electronic water pump is connected with the first end of the motor and the control integrated machine, the second end of the motor and the control integrated machine is connected with the first end of the radiator, the second end of the radiator is connected with the first end of the second electronic three-way valve, the second end of the second electronic three-way valve is connected with the fourth end of the electronic four-way valve, and the third end of the second electronic three-way valve is connected with the pipeline between the motor and the control integrated machine and the radiator.

8. A control method of a thermal management system, characterized by, The method is applied to the thermal management system of claim 7, and the method comprises: In response to a control instruction of the thermal management system, a compressor in the refrigerant circuit is controlled to discharge refrigerant and an electronic expansion valve is opened; The target electronic water pump in the cooling liquid circuit is controlled to operate, and the target electronic expansion valve in the cooling liquid circuit is opened, wherein the target electronic water pump comprises one or more of the first electronic water pump and the second electronic water pump, and the target electronic expansion valve comprises one or more of the first flow regulating valve, the second flow regulating valve, the third flow regulating valve, the fourth flow regulating valve, the first electronic three-way valve, the second electronic three-way valve and the electronic four-way valve.

9. The method of claim 8, wherein, The response to the control instruction of the thermal management system, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened, comprises: In response to an opening instruction of the air conditioner and the refrigerator refrigeration mode, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened; The control of the target electronic water pump in the cooling liquid circuit to operate and the opening of the target electronic expansion valve in the cooling liquid circuit, comprises: The first electronic water pump and the second electronic water pump in the cooling liquid circuit are controlled to operate, and the first flow regulating valve, the second flow regulating valve, the third flow regulating valve and the fourth flow regulating valve are opened, the first end and the second end of the first electronic three-way valve are opened, the first end and the second end of the second electronic three-way valve are opened, and the first end, the second end, the third end and the fourth end of the electronic four-way valve are opened.

10. The method of claim 8, wherein, The response to the control instruction of the thermal management system, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened, comprises: In response to an opening instruction of the single air conditioner refrigeration mode, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened; The control of the target electronic water pump in the cooling liquid circuit to operate and the opening of the target electronic expansion valve in the cooling liquid circuit, comprises: The first electronic water pump and the second electronic water pump in the cooling liquid circuit are controlled to operate, and the first flow regulating valve, the third flow regulating valve and the fourth flow regulating valve are opened, the first end and the second end of the first electronic three-way valve are opened, the first end and the second end of the second electronic three-way valve are opened, and the first end, the second end, the third end and the fourth end of the electronic four-way valve are opened.

11. The method of claim 8, wherein, The response to the control instruction of the thermal management system, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened, comprises: In response to an opening instruction of a single-refrigerator refrigeration mode, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened; The control of the target electronic water pump in the cooling liquid circuit to operate and the target electronic expansion valve in the cooling liquid circuit to open comprises: The first electronic water pump and the second electronic water pump in the cooling liquid circuit are controlled to operate, the first flow regulating valve, the second flow regulating valve, and the fourth flow regulating valve are opened, the first electronic three-way valve is opened at the second end and the third end, the second electronic three-way valve is opened at the second end and the third end, and the electronic four-way valve is opened at the first end, the second end, the third end, and the fourth end.

12. The method of claim 8, wherein, The control of the compressor in the refrigerant circuit to discharge refrigerant and the electronic expansion valve to open in response to a control instruction of the thermal management system comprises: In response to an opening instruction of an air-conditioning heating and refrigerator refrigeration mode, the compressor in the refrigerant circuit is controlled to discharge refrigerant and the electronic expansion valve is opened; The control of the target electronic water pump in the cooling liquid circuit to operate and the target electronic expansion valve in the cooling liquid circuit to open comprises: The first electronic water pump and the second electronic water pump in the cooling liquid circuit are controlled to operate, the first flow regulating valve, the second flow regulating valve, the third flow regulating valve, and the fourth flow regulating valve are opened, the first electronic three-way valve is opened at the second end and the third end, the second electronic three-way valve is opened at the second end and the third end, and the electronic four-way valve is opened at the first end, the second end, the third end, and the fourth end.

13. A vehicle characterized by comprising: The thermal management system comprises: The thermal management system according to any one of claims 5 to 7.

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