Thermal management system, vehicle and thermal management system control method

Abstract

The application provides a heat management system, a vehicle and a heat management system control method, relates to the technical field of vehicles, and the heat management system comprises an air conditioning circuit and a heating circuit; the air conditioning circuit comprises a compressor, and a first heater is arranged on the air intake side of the compressor. The first heater is fixedly installed on the air intake side of the compressor, and is used for heating refrigerant at the air inlet of the compressor when the vehicle is in a low-temperature environment, so that the starting and operating environment of the compressor is improved, the load on the scroll part of the compressor is reduced, scroll damage and scroll jamming are prevented, the service life and operating reliability of the compressor are improved, and the working efficiency of the compressor in the low-temperature environment is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a thermal management system, a vehicle, and a control method for the thermal management system. Background Technology

[0002] With the rapid development of range-extended, hybrid, and pure electric vehicle configurations in the market, vehicle thermal management systems are becoming increasingly important. The performance of the thermal management system is closely related to the driving comfort and functionality of the passenger compartment.

[0003] The current thermal management system includes an air conditioning circuit. When the passenger compartment needs heating, the air conditioning circuit can operate in heat pump mode to heat the passenger compartment.

[0004] However, when the compressor in the air conditioning circuit starts in a low-temperature environment, especially in an ambient temperature below -15°C, there is a large amount of liquid in the compressor, which will put a large load on the compressor scroll section, and may even cause scroll damage and scroll jamming, resulting in poor compressor lifespan and reliability. Summary of the Invention

[0005] The purpose of this invention is to provide a thermal management system to solve the technical problems of poor service life and reliability of compressors in low-temperature environments in the prior art.

[0006] The thermal management system provided by the present invention includes an air conditioning circuit and a heating circuit; The air conditioning circuit includes a compressor, and the compressor has a first heater on its intake side.

[0007] Furthermore, the compressor's intake side is also equipped with a first temperature sensor and a pressure sensor.

[0008] Furthermore, the thermal management system also includes a second temperature sensor for detecting the ambient temperature of the vehicle.

[0009] Furthermore, the thermal management system also includes a controller, and the air conditioning circuit, the heating circuit, the first temperature sensor, the second temperature sensor, and the pressure sensor are all connected to the controller; The controller is configured to: When the ambient temperature of the vehicle is greater than the second preset temperature but less than the first preset temperature, the compressor and the first heater are started. When the ambient temperature of the vehicle is greater than the third preset temperature but less than the second preset temperature, the compressor, the first heater, and the heating circuit are activated.

[0010] Furthermore, the warm air circuit includes a pump body, a warm air heater, and a warm air core, which are connected in sequence.

[0011] Another objective of this invention is to provide a vehicle including the thermal management system provided by this invention.

[0012] Another objective of this invention is to provide a thermal management system control method for controlling the thermal management system provided by this invention, comprising the following steps: When the ambient temperature of the vehicle is greater than the second preset temperature but less than the first preset temperature, the compressor and the first heater are started, and the air conditioning circuit operates in heat pump mode to heat the passenger compartment. When the ambient temperature of the vehicle is greater than the third preset temperature but less than the second preset temperature, the compressor, the first heater and the heating circuit are started. The air conditioning circuit operates in heat pump mode and the heating circuit simultaneously heats the passenger compartment.

[0013] Furthermore, it also includes the following steps: When the ambient temperature of the vehicle is higher than the first preset temperature, the compressor is started and the air conditioning circuit operates in heat pump mode to heat the passenger compartment.

[0014] Furthermore, it also includes the following steps: The first preset temperature is 5°C to 0°C, the second preset temperature is -10°C to -15°C, and the third preset temperature is -35°C to -40°C.

[0015] Furthermore, it also includes the following steps: Obtain the ambient temperature of the vehicle, the refrigerant temperature and pressure on the compressor inlet side.

[0016] The thermal management system provided by this invention includes an air conditioning circuit and a heating circuit; the air conditioning circuit includes a compressor, and a first heater is provided on the intake side of the compressor. The first heater is fixedly installed on the intake side of the compressor. When the vehicle is in a low-temperature environment, the first heater is used to heat the refrigerant at the compressor's intake port, thereby improving the compressor's start-up and operating environment, reducing the load on the compressor's scroll section, preventing scroll damage and scroll jamming, improving the compressor's service life and operational reliability, and increasing the compressor's operating efficiency in low-temperature environments. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the thermal management system provided in an embodiment of the present invention; Figure 2 This is an exploded view of the compressor of the thermal management system provided in an embodiment of the present invention; Figure 3 This is a control flowchart of the thermal management system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the operating boundary of the compressor in the thermal management system provided in an embodiment of the present invention.

[0019] Icons: 1-Air conditioning circuit; 11-Compressor; 111-First heater; 112-Temperature and pressure sensor; 12-First heat exchanger; 13-Throttle valve; 14-Second heat exchanger; 2-Heating circuit; 21-Pump body; 22-Heating heater; 23-Heating core; 3-Fan; 4-Air outlet; 5-Controller. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a thermal management system, a vehicle, and a thermal management system control method. Several embodiments are given below to describe in detail the thermal management system, vehicle, and thermal management system control method provided by this invention.

[0022] Example 1 The thermal management system provided in this embodiment, such as Figures 1 to 4 As shown, it includes an air conditioning circuit 1 and a heating circuit 2; the air conditioning circuit 1 includes a compressor 11, and the intake side of the compressor 11 is provided with a first heater 111.

[0023] The air conditioning circuit 1 includes a compressor 11, a first heat exchanger 12, a throttle valve 13, and a second heat exchanger 14 connected in sequence, and the compressor 11, the first heat exchanger 12, the throttle valve 13, and the second heat exchanger 14 form a circulation loop.

[0024] The first heater 111 is fixedly installed on the intake side of the compressor 11. When the vehicle is in a low-temperature environment, the first heater 111 is used to heat the refrigerant at the intake port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in a low-temperature environment.

[0025] The compressor 11 has its air inlet connected to the air inlet pipe, and the first heater 111 can be fixedly installed on the air inlet pipe.

[0026] Figure 4 This is a schematic diagram of the operating boundaries of compressor 11. When compressor 11 is running, both the suction pressure and superheat of compressor 11 need to meet the operating boundaries.

[0027] Furthermore, the compressor 11 is also equipped with a first temperature sensor and a pressure sensor on the intake side.

[0028] The first temperature sensor is fixedly installed on the intake side of the compressor 11, and the pressure sensor is fixedly installed on the intake side of the compressor 11.

[0029] The first temperature sensor can be fixed at the air inlet of the compressor 11 or at the end of the air inlet pipe facing the compressor 11. The pressure sensor can be fixed at the air inlet of the compressor 11 or at the end of the air inlet pipe facing the compressor 11.

[0030] The first temperature sensor detects the refrigerant temperature at the inlet of compressor 11, and the pressure sensor detects the refrigerant pressure at the inlet of compressor 11. The controller 5 is connected to the first temperature sensor and the pressure sensor respectively. The controller 5 can monitor the refrigerant temperature and refrigerant pressure at the inlet of compressor 11 in real time, thereby monitoring the refrigerant status at the inlet of compressor 11.

[0031] If the refrigerant temperature and pressure values ​​at the compressor 11 inlet do not fall within the preset range, an alarm signal can be issued by the controller 5 to alert the user that the refrigerant condition at the compressor 11 inlet is poor. After receiving the alarm signal, the user can activate the first heater 111 to improve the refrigerant condition at the compressor 11 inlet.

[0032] In addition, when the refrigerant temperature and refrigerant pressure values ​​at the compressor 11 inlet do not meet the preset range, the controller 5 can issue an alarm signal to alert the user and control the first heater 111 to improve the refrigerant status at the compressor 11 in a timely manner.

[0033] A temperature and pressure sensor 112 can also be installed on the intake side of the compressor 11. The temperature and pressure sensor 112 can detect the refrigerant temperature and pressure at the intake port of the compressor 11, which reduces the number of parts and makes the structure more compact.

[0034] The first heater 111 is a high-pressure heater.

[0035] Furthermore, the thermal management system also includes a second temperature sensor for detecting the ambient temperature of the vehicle.

[0036] The second temperature sensor can be fixedly installed in any suitable location on the vehicle, such as the front compartment, body, or trunk.

[0037] The second temperature sensor is used to detect the ambient temperature of the vehicle. The second temperature sensor is connected to the controller 5, which can receive the ambient temperature value of the vehicle.

[0038] The controller 5 can continuously detect the ambient temperature of the vehicle. When the ambient temperature is lower than the first preset temperature, the controller 5 can issue an alarm message to remind the user that the ambient temperature of the vehicle is low and the refrigerant at the inlet of the compressor 11 is not in good condition.

[0039] Furthermore, the second temperature sensor can provide feedback on the passenger compartment's heating needs. When the ambient temperature in the vehicle is lower than the fourth preset temperature, the passenger compartment requires heating, and the controller 5 can issue a notification to prompt the user to activate the heating function.

[0040] Furthermore, the thermal management system also includes a controller 5, and the air conditioning circuit 1, the heating circuit 2, the first temperature sensor, the second temperature sensor, and the pressure sensor are all connected to the controller 5; the controller 5 is configured to: start the compressor 11 and the first heater 111 when the ambient temperature of the vehicle is greater than the second preset temperature and less than the first preset temperature; start the compressor 11, the first heater 111, and the heating circuit 2 when the ambient temperature of the vehicle is greater than the third preset temperature and less than the second preset temperature.

[0041] Specifically, when the ambient temperature of the vehicle is higher than the second preset temperature and lower than the first preset temperature, the controller 5 controls the compressor 11 and the first heater 111 to start. The first heater 111 heats the refrigerant at the intake port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in low-temperature environments. After the compressor 11 starts, the air conditioning circuit 1 operates in heat pump mode to heat the passenger compartment, keeping the passenger compartment at a suitable temperature and providing good comfort.

[0042] When the ambient temperature of the vehicle is higher than the third preset temperature and lower than the second preset temperature, the controller 5 controls the compressor 11, the first heater 111, and the pump body 21 and heater 22 of the heating circuit 2 to turn on. The first heater 111 heats the refrigerant at the intake port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in low-temperature environments. After the compressor 11 starts, the air conditioning circuit 1 operates in heat pump mode to heat the passenger compartment. At the same time, the heating circuit 2 also heats the passenger compartment, providing more heat to the passenger compartment and maintaining a suitable temperature, thus ensuring good comfort in the passenger compartment.

[0043] The controller 5 is also configured to start the compressor 11 and put the air conditioning circuit 1 into heat pump mode to heat the passenger compartment when the ambient temperature of the vehicle is higher than the first preset temperature.

[0044] When the ambient temperature of the vehicle is higher than the first preset temperature, after the compressor 11 is started, the air conditioning circuit 1 operates in heat pump mode to provide heating for the passenger compartment.

[0045] At this time, the ambient temperature of the vehicle is relatively high. Even without turning on the first heater 111, the refrigerant at the air intake of the compressor 11 can maintain a good state, and turning off the first heater 111 can also save energy.

[0046] Furthermore, the warm air circuit 2 includes a pump body 21, a warm air heater 22, and a warm air core 23, which are connected in sequence.

[0047] Pump body 21, heater 22 and heater core 23 are connected in sequence to form a circulation loop. The liquid heated by heater 22 flows into heater core 23, and the air blown out by fan 3 passes through heater core 23 and is blown towards air outlet 4 of the crew compartment, thereby heating the crew compartment.

[0048] Among them, the warm air heater 22 can be a PTC heater.

[0049] The passenger compartment is provided with an air outlet 4. The heating core 23 is located on one side of the second heat exchanger 14. The air outlet 4 of the fan 3 is set towards the heating core 23 and the second heat exchanger 14. The air blown out by the air outlet 4 of the fan 3 can flow through the heating core 23 and the second heat exchanger 14, and after flowing through the heating core 23 and the second heat exchanger 14, it can flow into the passenger compartment through the air outlet 4.

[0050] Example 2 The vehicle provided in this embodiment includes the thermal management system provided in Embodiment 1. The first heater 111 is fixedly installed on the intake side of the compressor 11. When the vehicle is in a low-temperature environment, the first heater 111 is used to heat the refrigerant at the intake port of the compressor 11, thereby improving the start-up and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in a low-temperature environment.

[0051] The compressor 11 has its air inlet connected to the air inlet pipe, and the first heater 111 can be fixedly installed on the air inlet pipe.

[0052] Furthermore, the compressor 11 is also equipped with a first temperature sensor and a pressure sensor on the intake side.

[0053] The first temperature sensor is fixedly installed on the intake side of the compressor 11, and the pressure sensor is fixedly installed on the intake side of the compressor 11.

[0054] The first temperature sensor can be fixed at the air inlet of the compressor 11 or at the end of the air inlet pipe facing the compressor 11. The pressure sensor can be fixed at the air inlet of the compressor 11 or at the end of the air inlet pipe facing the compressor 11.

[0055] The first temperature sensor detects the refrigerant temperature at the inlet of compressor 11, and the pressure sensor detects the refrigerant pressure at the inlet of compressor 11. The controller 5 is connected to the first temperature sensor and the pressure sensor respectively. The controller 5 can monitor the refrigerant temperature and refrigerant pressure at the inlet of compressor 11 in real time, thereby monitoring the refrigerant status at the inlet of compressor 11.

[0056] If the refrigerant temperature and pressure values ​​at the compressor 11 inlet do not fall within the preset range, an alarm signal can be issued by the controller 5 to alert the user that the refrigerant condition at the compressor 11 inlet is poor. After receiving the alarm signal, the user can activate the first heater 111 to improve the refrigerant condition at the compressor 11 inlet.

[0057] In addition, when the refrigerant temperature and refrigerant pressure values ​​at the compressor 11 inlet do not meet the preset range, the controller 5 can issue an alarm signal to alert the user and control the first heater 111 to improve the refrigerant status at the compressor 11 in a timely manner.

[0058] The first heater 111 is a high-pressure heater.

[0059] Furthermore, the thermal management system also includes a second temperature sensor for detecting the ambient temperature of the vehicle.

[0060] The second temperature sensor can be fixedly installed in any suitable location on the vehicle, such as the front compartment, body, or trunk.

[0061] The second temperature sensor is used to detect the ambient temperature of the vehicle. The second temperature sensor is connected to the controller 5, which can receive the ambient temperature value of the vehicle.

[0062] The controller 5 can continuously detect the ambient temperature of the vehicle. When the ambient temperature is lower than the first preset temperature, the controller 5 can issue an alarm message to remind the user that the ambient temperature of the vehicle is low and the refrigerant at the inlet of the compressor 11 is not in good condition.

[0063] Furthermore, the thermal management system also includes a controller 5, and the air conditioning circuit 1, the heating circuit 2, the first temperature sensor, the second temperature sensor, and the pressure sensor are all connected to the controller 5; the controller 5 is configured to: start the compressor 11 and the first heater 111 when the ambient temperature of the vehicle is greater than the second preset temperature and less than the first preset temperature; start the compressor 11, the first heater 111, and the heating circuit 2 when the ambient temperature of the vehicle is greater than the third preset temperature and less than the second preset temperature.

[0064] Specifically, when the ambient temperature of the vehicle is higher than the second preset temperature and lower than the first preset temperature, the controller 5 controls the compressor 11 and the first heater 111 to start. The first heater 111 heats the refrigerant at the intake port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in low-temperature environments. After the compressor 11 starts, the air conditioning circuit 1 operates in heat pump mode to heat the passenger compartment, keeping the passenger compartment at a suitable temperature and providing good comfort.

[0065] When the ambient temperature of the vehicle is higher than the third preset temperature and lower than the second preset temperature, the controller 5 controls the compressor 11, the first heater 111, and the pump body 21 and heater 22 of the heating circuit 2 to turn on. The first heater 111 heats the refrigerant at the intake port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in low-temperature environments. After the compressor 11 starts, the air conditioning circuit 1 operates in heat pump mode to heat the passenger compartment. At the same time, the heating circuit 2 also heats the passenger compartment, providing more heat to the passenger compartment and maintaining a suitable temperature, thus ensuring good comfort in the passenger compartment.

[0066] Furthermore, the warm air circuit 2 includes a pump body 21, a warm air heater 22, and a warm air core 23, which are connected in sequence.

[0067] Pump body 21, heater 22 and heater core 23 are connected in sequence to form a circulation loop. The liquid heated by heater 22 flows into heater core 23, and the air blown out by fan 3 passes through heater core 23 and is blown towards air outlet 4 of the crew compartment, thereby heating the crew compartment.

[0068] Among them, the warm air heater 22 can be a PTC heater.

[0069] The passenger compartment is provided with an air outlet 4. The heating core 23 is located on one side of the second heat exchanger 14. The air outlet 4 of the fan 3 is set towards the heating core 23 and the second heat exchanger 14. The air blown out by the air outlet 4 of the fan 3 can flow through the heating core 23 and the second heat exchanger 14, and after flowing through the heating core 23 and the second heat exchanger 14, it can flow into the passenger compartment through the air outlet 4.

[0070] Example 3 The thermal management system control method provided in this embodiment is used to control the thermal management system provided in Embodiment 1, and includes the following steps: When the ambient temperature of the vehicle is greater than the second preset temperature but less than the first preset temperature, the compressor 11 and the first heater 111 are started, and the air conditioning circuit 1 is in heat pump mode to provide heating for the passenger compartment. When the ambient temperature of the vehicle is greater than the third preset temperature but less than the second preset temperature, the compressor 11, the first heater 111 and the heating circuit 2 are started. The air conditioning circuit 1 is in heat pump mode and the heating circuit 2 simultaneously heats the passenger compartment.

[0071] The first heater 111 is fixedly installed on the intake side of the compressor 11. When the vehicle is in a low-temperature environment, the first heater 111 is used to heat the refrigerant at the intake port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in a low-temperature environment.

[0072] When the ambient temperature of the vehicle is greater than the second preset temperature, the ambient temperature of the vehicle is less than the first preset temperature, and the refrigerant temperature and pressure at the suction port of the compressor 11 meet the preset range, the controller 5 controls the compressor 11 and the first heater 111 to start. The first heater 111 heats the refrigerant at the suction port of the compressor 11, thereby improving the starting and operating environment of the compressor 11, reducing the load on the scroll part of the compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of the compressor 11, and improving the working efficiency of the compressor 11 in low temperature environments. After the compressor 11 starts, the suction pressure and superheat of the compressor 11 must meet the operating boundaries. The air conditioning circuit 1 operates in heat pump mode to heat the passenger compartment, keeping the passenger compartment at a suitable temperature and providing good comfort to the passenger compartment.

[0073] When the ambient temperature of the vehicle is greater than the third preset temperature, and the ambient temperature of the vehicle is less than the second preset temperature, and the refrigerant temperature and pressure at the intake port of compressor 11 meet the preset range, controller 5 controls compressor 11, first heater 111, and pump body 21 and heater 22 of heating circuit 2 to start. First heater 111 heats the refrigerant at the intake port of compressor 11, thereby improving the starting and operating environment of compressor 11, reducing the load on the scroll part of compressor 11, preventing scroll damage and scroll jamming, improving the service life and operational reliability of compressor 11, and improving the working efficiency of compressor 11 in low temperature environment. After compressor 11 starts, the intake pressure and superheat of compressor 11 need to meet the operating boundary. Air conditioning circuit 1 operates in heat pump mode to heat the passenger compartment. At the same time, heating circuit 2 also heats the passenger compartment, which can provide more heat to the passenger compartment, keep the passenger compartment at a suitable temperature, and make the passenger compartment comfortable.

[0074] Furthermore, it also includes the following steps: When the ambient temperature of the vehicle is higher than the first preset temperature, the compressor 11 is started and the air conditioning circuit 1 is in heat pump mode to provide heating for the passenger compartment.

[0075] When the ambient temperature of the vehicle is higher than the first preset temperature, and the refrigerant temperature and pressure at the intake port of the compressor 11 are within the preset range, after the compressor 11 is started, the intake pressure and superheat of the compressor 11 must meet the operating boundary, and the air conditioning circuit 1 is in heat pump mode to provide heating for the passenger compartment.

[0076] At this time, the ambient temperature of the vehicle is relatively high. Even without turning on the first heater 111, the refrigerant at the air intake of the compressor 11 can maintain a good state, and turning off the first heater 111 can also save energy.

[0077] Furthermore, it also includes the following steps: The first preset temperature is 5℃ to 0℃, the second preset temperature is -10℃ to -15℃, and the third preset temperature is -35℃ to -40℃.

[0078] The first preset temperature can be -5℃, -4℃, -3℃, -2℃, -1℃, or 0℃, etc.

[0079] The second preset temperature can be -10℃, -11℃, -12℃, -13℃, -14℃, or -15℃, etc.

[0080] The third preset temperature can be -35℃, -36℃, -37℃, -38℃, -39℃, or -40℃, etc.

[0081] Furthermore, it also includes the following steps: Obtain the ambient temperature of the vehicle, the refrigerant temperature and pressure on the inlet side of compressor 11.

[0082] The first temperature sensor is fixedly installed on the intake side of the compressor 11, and the pressure sensor is fixedly installed on the intake side of the compressor 11.

[0083] The first temperature sensor can be fixed at the air inlet of the compressor 11 or at the end of the air inlet pipe facing the compressor 11. The pressure sensor can be fixed at the air inlet of the compressor 11 or at the end of the air inlet pipe facing the compressor 11.

[0084] The first temperature sensor detects the refrigerant temperature at the inlet of compressor 11, and the pressure sensor detects the refrigerant pressure at the inlet of compressor 11. The controller 5 is connected to the first temperature sensor and the pressure sensor respectively. The controller 5 can monitor the refrigerant temperature and refrigerant pressure at the inlet of compressor 11 in real time, thereby monitoring the refrigerant status at the inlet of compressor 11.

[0085] If the refrigerant temperature and pressure values ​​at the compressor 11 inlet do not fall within the preset range, an alarm signal can be issued by the controller 5 to alert the user that the refrigerant condition at the compressor 11 inlet is poor. After receiving the alarm signal, the user can activate the first heater 111 to improve the refrigerant condition at the compressor 11 inlet.

[0086] In addition, when the refrigerant temperature and refrigerant pressure values ​​at the compressor 11 inlet do not meet the preset range, the controller 5 can issue an alarm signal to alert the user and control the first heater 111 to improve the refrigerant status at the compressor 11 in a timely manner.

[0087] The second temperature sensor can be fixedly installed in any suitable location on the vehicle, such as the front compartment, body, or trunk.

[0088] The second temperature sensor is used to detect the ambient temperature of the vehicle. The second temperature sensor is connected to the controller 5, which can receive the ambient temperature value of the vehicle.

[0089] The controller 5 can continuously monitor the ambient temperature of the vehicle. When the ambient temperature is lower than the first preset temperature, the controller 5 can issue an alarm to remind the user that the ambient temperature of the vehicle is low and the refrigerant at the inlet of the compressor 11 is not in good condition.

[0090] The thermal management system control method provided in this embodiment controls the thermal management system provided in Embodiment 1, which can improve the efficiency, lifespan and reliability of the compressor 11. The cooling capacity and COP of the compressor 11 with and without the first heater 111 on the intake side are shown in Table 1.

[0091] Table 1

[0092] The ambient temperature, dynamic and static scroll (surface treatment), and motor starting torque of the components of the heat pump, the ultra-low temperature heat pump, and the thermal management system provided in Example 1 are shown in Table 2.

[0093] Table 2

[0094] The states of the refrigerant in the thermal management system provided in Example 1 under different temperature and pressure conditions are shown in Table 3.

[0095] Table 3

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system, characterized in that, It includes an air conditioning circuit (1) and a heating circuit (2); The air conditioning circuit (1) includes a compressor (11), and the compressor (11) has a first heater (111) on its intake side.

2. The thermal management system according to claim 1, characterized in that, The compressor (11) is also equipped with a first temperature sensor and a pressure sensor on the intake side.

3. The thermal management system according to claim 2, characterized in that, The thermal management system also includes a second temperature sensor for detecting the ambient temperature of the vehicle.

4. The thermal management system according to claim 3, characterized in that, The thermal management system also includes a controller (5), and the air conditioning circuit (1), the heating circuit (2), the first temperature sensor, the second temperature sensor and the pressure sensor are all connected to the controller (5); The controller (5) is configured as follows: When the ambient temperature of the vehicle is greater than the second preset temperature and less than the first preset temperature, the compressor (11) and the first heater (111) are started. When the ambient temperature of the vehicle is greater than the third preset temperature but less than the second preset temperature, the compressor (11), the first heater (111), and the heating circuit (2) are started.

5. The thermal management system according to claim 1, characterized in that, The warm air circuit (2) includes a pump body (21), a warm air heater (22), and a warm air core (23), which are connected in sequence.

6. A vehicle, characterized in that, The thermal management system includes any one of claims 1-5.

7. A control method for a thermal management system, characterized in that, A thermal management system for controlling any one of claims 1-5 comprises the following steps: When the ambient temperature of the vehicle is greater than the second preset temperature and less than the first preset temperature, the compressor (11) and the first heater (111) are started, and the air conditioning circuit (1) is in heat pump mode to provide heating for the passenger compartment. When the ambient temperature of the vehicle is greater than the third preset temperature and less than the second preset temperature, the compressor (11), the first heater (111) and the heating circuit (2) are started. The air conditioning circuit (1) is in heat pump mode and the heating circuit (2) simultaneously heats the passenger compartment.

8. The thermal management system control method according to claim 7, characterized in that, It also includes the following steps: When the ambient temperature of the vehicle is higher than the first preset temperature, the compressor (11) is started and the air conditioning circuit (1) is in heat pump mode to provide heating for the passenger compartment.

9. The thermal management system control method according to claim 7, characterized in that, It also includes the following steps: The first preset temperature is 5°C to 0°C, the second preset temperature is -10°C to -15°C, and the third preset temperature is -35°C to -40°C.

10. The thermal management system control method according to claim 7, characterized in that, It also includes the following steps: Obtain the ambient temperature of the vehicle, the refrigerant temperature and pressure on the inlet side of the compressor (11).

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