Thermal management system and vehicle

Abstract

The application relates to a heat management system and a vehicle, and relates to the technical field of vehicles. The heat management system comprises a compressor, a first loop and a second loop connected with the compressor outlet. The first loop comprises a first control valve and an external condenser, and the first control valve is connected with the compressor and the external condenser respectively. The second loop comprises a second control valve and an internal condenser, and the second control valve is connected with the compressor and the internal condenser respectively. The heat management system is configured to: in the case that a current temperature is less than or equal to a first temperature threshold and a heating working condition is started, open the first control valve and close the second control valve. In the case that the compressor runs for a first time threshold and / or the exhaust pressure of the compressor is greater than or equal to a first pressure threshold, the first control valve is closed and the second control valve is opened. The heat management system is used for adjusting the refrigerant in the working loop.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a thermal management system and a vehicle. BACKGROUND

[0002] With the development of motor and power battery technologies of new energy electric vehicles, users experience increasing range while also demanding higher requirements for the thermal management system of the vehicle.

[0003] A related technical solution discloses a thermal management system and a vehicle. The system can realize passenger cabin heating, dehumidification, cooling, and battery cooling and heating. When refrigerant is cooled, it enters an outdoor condenser to dissipate heat, passes through a second throttling device to enter an indoor evaporator to realize passenger cabin cooling, or passes through a third throttling device to enter a battery cooler to realize cooling of the battery water circuit. When heating, the refrigerant directly enters an indoor condenser to realize heating of the passenger cabin and passes through a first throttling device to enter an outdoor heat exchanger to absorb heat or passes through a third throttling device to enter a battery cooler to absorb electric drive waste heat. The passenger cabin and the battery can also be heated by an indoor heat exchanger and a heater. In the current thermal management system, there is a problem of refrigerant accumulation, which leads to an abnormal amount of refrigerant in the working circuit.

[0004] To adjust the amount of refrigerant in the refrigerant circuit, a refrigerant scheduling circuit including an electronic expansion valve (EXV) and a pipeline is usually added. Thus, the cost of the thermal management system is increased. SUMMARY

[0005] One of the purposes of the present application is to provide a thermal management system and a vehicle that adjust the amount of refrigerant in the working circuit.

[0006] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0007] According to a first aspect of the present application, a thermal management system is provided, which includes a compressor and a first circuit and a second circuit connected to the outlet of the compressor. The first circuit includes a first control valve and an external condenser, and the first control valve is connected to the compressor and the external condenser, respectively. The second circuit includes a second control valve and an internal condenser, and the second control valve is connected to the compressor and the internal condenser, respectively. The thermal management system is configured to open the first control valve and close the second control valve when the current temperature is less than or equal to a first temperature threshold and a heating working condition is started. The first control valve is closed and the second control valve is opened when the compressor runs for a first time threshold and / or the exhaust pressure of the compressor is greater than or equal to a first pressure threshold.

[0008] According to the above technical means, in a low-temperature environment, the heat pump is started, the second control valve is closed, and the first control valve is opened. Further, in the case that the heat pump continues for a first duration threshold and / or the compressor outlet pressure reaches a first pressure threshold, the first control valve is closed and the second control valve is opened. In this way, the pressure of the external condenser is gradually increased, the gas-phase refrigerant replaces the liquid-phase refrigerant, the liquid refrigerant accumulated in the external condenser is reduced, and the working circuit has sufficient refrigerant. In this way, by controlling the opening and closing of the second control valve and the first control valve, the refrigerant is adjusted without increasing hardware, avoiding the increase in cost of the thermal management system.

[0009] In one possible manner, the thermal management system further includes a cooling fan and an active air intake grille. The thermal management system is further configured to: before the compressor operates for a first duration threshold and / or the exhaust pressure of the compressor is greater than or equal to a first pressure threshold, the cooling fan is turned off and / or the active air intake grille is turned off.

[0010] According to the above technical means, in the case that the compressor is controlled to operate at a first rotational speed, the second control valve is closed, and the first control valve is opened, the cooling fan is turned off, and the active air intake grille is turned off, further ensuring that the pressure of the external condenser is gradually increased, the gas-phase refrigerant in the first circuit replaces the liquid-phase refrigerant, the refrigerant accumulated in the external condenser is reduced, and the second circuit has sufficient refrigerant.

[0011] In one possible manner, the thermal management system is further configured to: in the case that the current temperature is greater than or equal to a second temperature threshold and the refrigeration working condition is started, the first control valve is opened and the second control valve is closed. In the case that the exhaust pressure of the compressor is greater than or equal to a second pressure threshold and the duration is greater than or equal to a second duration threshold, the second control valve is opened, and in the case that the second control valve is opened for a first duration, the second control valve is closed.

[0012] According to the above technical means, in a high-temperature environment, the cooling working condition (such as cooling the passenger cabin or the battery) is started, the first control valve is opened, and the second control valve is closed. In the case that the system pressure is detected to be large, the second control valve is opened, the compressor is controlled to operate at a second rotational speed, and in the case that the double opening continues to operate for a first duration, the second control valve is closed. In this way, the high-pressure relief of the thermal management system is realized, the compressor is prevented from stopping due to high pressure, and the influence on the comfort of the passenger cabin is reduced.

[0013] In one possible manner, the thermal management system is further configured to: in the case that the refrigeration working condition is started, the first control valve and the second control valve are opened. In the case that the compressor operates for a third duration threshold and / or the exhaust pressure of the compressor is greater than or equal to a third pressure threshold, the second control valve is closed.

[0014] According to the above technical means, when the refrigeration working condition starts, the first control valve and the second control valve are opened, and in the case that the third time threshold of the compressor is running and / or the exhaust pressure of the compressor is greater than or equal to the third pressure threshold, the second control valve is closed. In this way, it is avoided that the second loop accumulates a large amount of liquid refrigerant or stores a certain pressure of gaseous refrigerant, and it is ensured that there is a suitable amount of refrigerant when the first loop operates.

[0015] In a possible manner, the thermal management system is further configured to, in the refrigeration working condition, open the second control valve in the case that the suction pressure of the thermal management system is less than or equal to a fourth pressure threshold and the rotating speed of the compressor is less than or equal to a first rotating speed threshold. In the case that the opening time of the second control valve is greater than or equal to a first preset time, the second control valve is closed.

[0016] In a possible manner, the thermal management system further comprises a throttling device, and the thermal management system is further configured to, in the refrigeration working condition, open the second control valve in the case that the suction superheat degree of the compressor is less than or equal to a first superheat degree threshold and the opening degree of the throttling device is less than or equal to a first opening degree threshold, and close the second control valve in the case that the opening time of the second control valve is greater than or equal to a fourth time threshold.

[0017] In a possible manner, the thermal management system is further configured to, in the heating working condition, control the compressor to operate at a target rotating speed and open the first control valve in the case that the exhaust pressure of the thermal management system is greater than or equal to a fifth pressure threshold and the rotating speed of the compressor is less than or equal to a second rotating speed threshold. In the case that the opening time of the first control valve is greater than or equal to a second preset time, the first control valve is closed.

[0018] In a possible manner, the thermal management system further comprises a water-cooled heat exchanger, and the thermal management system is further configured to, in the heating working condition, open the first control valve in the case that the suction pressure of the thermal management system is less than or equal to a sixth pressure threshold, the rotating speed of the compressor is less than or equal to a third rotating speed threshold, and the water inlet temperature of the water-cooled heat exchanger is greater than or equal to a third temperature threshold, and close the first control valve in the case that the opening time of the first control valve is greater than or equal to a fifth time threshold.

[0019] In a possible manner, the thermal management system further comprises a throttling device, and the thermal management system is further configured to, in the heating working condition, open the first control valve in the case that the suction superheat degree of the compressor is less than or equal to a second superheat degree threshold and the opening degree of the throttling device is less than or equal to a second opening degree threshold, and close the first control valve in the case that the opening time of the first control valve is greater than or equal to a sixth time threshold.

[0020] In a possible implementation, the first circuit further comprises a third control valve, a high-pressure liquid storage tank, a first throttling device, and a first water-cooled heat exchanger. An inlet of the third control valve is connected to an outlet of the external condenser, and an outlet of the third control valve is connected to an inlet of the high-pressure liquid storage tank. An outlet of the high-pressure liquid storage tank is connected to an inlet of the first throttling device, and an outlet of the first throttling device is connected to an inlet of the first water-cooled heat exchanger. An outlet of the water-cooled heat exchanger is connected to an inlet of the compressor.

[0021] In a possible implementation, the second circuit further comprises a second water-cooled heat exchanger, a fourth control valve, a second throttling device, and a heat exchanger. An inlet of the second water-cooled heat exchanger is connected to an outlet of the internal condenser, an outlet of the second water-cooled heat exchanger is connected to an inlet of the fourth control valve, and an outlet of the fourth control valve is connected to an inlet of the high-pressure liquid storage tank. An outlet of the high-pressure liquid storage tank is connected to an inlet of the second throttling device, an outlet of the second throttling device is connected to an inlet of the heat exchanger, and an outlet of the heat exchanger is connected to an inlet of the compressor.

[0022] According to a second aspect provided in the present application, a vehicle is provided, which comprises the heat management system of the first aspect.

[0023] Therefore, the above technical features of the present application have the following beneficial effects:

[0024] (1) In a low-temperature environment, the heat pump is started, the second control valve is closed, and the first control valve is opened. Further, in a case where the heat pump continues for a first time threshold and / or the outlet pressure of the compressor reaches a first pressure threshold, the first control valve is closed and the second control valve is opened. In this way, the pressure of the external condenser is gradually increased, the gaseous refrigerant replaces the liquid refrigerant, the liquid refrigerant accumulated in the external condenser is reduced, and sufficient refrigerant is ensured in the working circuit. In this way, by controlling the opening and closing of the second control valve and the first control valve, the refrigerant is adjusted without increasing the hardware, thereby avoiding the increase in the cost of the heat management system.

[0025] (2) In a case where the compressor is controlled to operate at a first rotating speed, the second control valve is closed, and the first control valve is opened, the cooling fan is closed, and the active air intake grille is closed, further ensuring that the pressure of the external condenser is gradually increased, the gaseous refrigerant in the first circuit replaces the liquid refrigerant, the refrigerant accumulated in the external condenser is reduced, and sufficient refrigerant is ensured in the second circuit.

[0026] (3) In a high-temperature environment, the cooling working condition (such as cooling the passenger cabin or the battery) is started, the first control valve is opened, and the second control valve is closed. In a case where it is detected that the system pressure is large, the second control valve is opened, the compressor is controlled to operate at a second rotating speed, and in a case where the double opening continues to operate for a first time, the second control valve is closed. In this way, the high-pressure relief of the heat management system is realized, the compressor is prevented from stopping due to high pressure, and the influence on the comfort of the passenger cabin is reduced.

[0027] (4) When the refrigeration working condition is started, the first control valve and the second control valve are opened, and the second control valve is closed when the compressor runs for a third time threshold and / or the exhaust pressure of the compressor is greater than or equal to a third pressure threshold. In this way, the second loop is prevented from accumulating a large amount of liquid refrigerant or a certain pressure of gaseous refrigerant, and the first loop is ensured to have an appropriate amount of refrigerant when running. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 One of the structural schematic diagrams of a heat management system provided by the present application;

[0029] Figure 2 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0030] Figure 3 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0031] Figure 4 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0032] Figure 5 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0033] Figure 6 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0034] Figure 7 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0035] Figure 8 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0036] Figure 9 One of the flow schematic diagrams of a refrigerant adjusting method provided by the present application;

[0037] Figure 10 One of the structural schematic diagrams of a heat management system provided by the present application;

[0038] Figure 11 One of the structural schematic diagrams of a heat management system provided by the present application;

[0039] Figure 12 One of the water connection flow direction schematic diagrams of a heat management system provided by the present application in a refrigeration working condition;

[0040] Figure 13 One of the water connection flow direction schematic diagrams of a heat management system provided by the present application in a heating working condition.

[0041] Reference Signs List

[0042] 1, compressor; 2, first control valve; 3, external condenser; 4, third control valve; 5, high-pressure liquid storage tank; 6, first throttling device; 7, first water-cooled heat exchanger; 8, second throttling device; 9, in-vehicle heat exchanger; 10, second control valve; 11, internal condenser; 12, second water-cooled heat exchanger; 13, fourth control valve; 14, gas-liquid separator; 15, third water-cooled heat exchanger; 16, electric drive assembly; 17, first water pump; 18, second water pump; 19, battery assembly; 20, waterway multi-way valve. DETAILED DESCRIPTION

[0043] The present application will be described with reference to the attached drawings and preferred embodiments, and by illustrating the advantages of the present application over the prior art. Other advantages of the present application will be readily apparent from the following description. The application can assume various alternative embodiments, and preferably each of the details of the application can be substituted for one another or can be used in combination. Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the application there is a plurality of equivalents to the details described herein. It is the scope of the application that is defined by the appended claims.

[0044] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the data so described can be interchanged, under suitable circumstances, without departing from the scope of the present application. The embodiments described in the following examples do not represent all the embodiments consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0045] With the development of motor and power battery technology of new energy electric vehicles, users experience the increasing range, and at the same time, higher requirements are put forward for the thermal management system of the whole vehicle.

[0046] The related technical solutions disclose a thermal management system and a vehicle. The system can realize passenger cabin heating, dehumidification, cooling, and battery cooling and heating. When refrigerant is cooled in the outdoor condenser, it enters the indoor evaporator through the second throttling device to realize passenger cabin cooling, or enters the battery cooler through the third throttling device to realize passenger cabin cooling. When heating, the refrigerant directly enters the indoor condenser to realize passenger cabin heating, and enters the outdoor heat exchanger through the first throttling device to absorb heat or enters the battery cooler through the third throttling device to absorb electric drive waste heat. The passenger cabin and the battery can also be heated by the indoor heat exchanger and the heater.

[0047] However, the current thermal management system has the following problems: in the scene where the temperature difference between inside and outside the vehicle is large, such as winter, the refrigerant in the external condenser will gradually condense after shutdown, and long-time shutdown will cause a large amount of refrigerant to accumulate on the outside, resulting in insufficient refrigerant in the working circuit and poor heating effect.

[0048] To solve the above technical problems, as shown in Figure 1 The present application provides a thermal management system 100, which comprises a compressor 1 and a first circuit and a second circuit connected with the outlet of the compressor 1. The first circuit comprises a first control valve 2 and an external condenser 3, and the first control valve 2 is connected with the compressor 1 and the external condenser 3 respectively. The second circuit comprises a second control valve 10 and an internal condenser 11, and the second control valve 10 is connected with the compressor 1 and the internal condenser 11 respectively. The thermal management system 100 is configured to open the first control valve 2 and close the second control valve 10 in the case that the current temperature is less than or equal to a first temperature threshold and the heating working condition is started. In the case that the compressor 1 runs for a first time threshold and / or the exhaust pressure of the compressor 1 is greater than or equal to a first pressure threshold, the first control valve 2 is closed and the second control valve 10 is opened.

[0049] For example, as shown in Figure 2 A refrigerant adjustment method flow chart of a thermal management system 100 is shown, which comprises S10-S17.

[0050] S10, start the heating working condition.

[0051] S11, open the first control valve 2 and close the second control valve 10.

[0052] In some embodiments, the first control valve 2 is opened and the second control valve 10 is closed in the case that the current temperature is less than or equal to the first temperature threshold.

[0053] In other embodiments, the first control valve 2 is opened, the second control valve 10 is closed, the cooling fan is closed, and the active air intake grille is closed in the case that the current temperature is less than or equal to the first temperature threshold and the heating working condition is started.

[0054] S12, control the compressor 1 to run at a first rotating speed.

[0055] It should be noted that the first rotating speed is pre-set by the operation and maintenance personnel, and the specific value of the first rotating speed is not limited in the embodiments of the present application.

[0056] S13, judge whether the running time of the compressor 1 is greater than or equal to a first time threshold.

[0057] If not, S14 is executed. If yes, S15 is executed.

[0058] S14, determining whether the discharge pressure of the compressor 1 is greater than or equal to a first pressure threshold.

[0059] If yes, S15 is executed. If no, it is continuously determined whether the running time of the compressor 1 is greater than or equal to a first time threshold.

[0060] The discharge pressure in the embodiments of the present application can be the outlet pressure of the compressor 1.

[0061] S15, opening the second control valve 10.

[0062] S16, determining whether the time length of the opening of the second control valve 10 is greater than or equal to a fifth preset time length.

[0063] If yes, S17 is executed. If no, it is continuously determined whether the time length of the opening of the second control valve 10 is greater than or equal to the fifth preset time length.

[0064] S17, closing the first control valve 2.

[0065] It can be understood that in a low-temperature environment, the heat pump is started, the second control valve is closed, and the first control valve is opened, and in the case of continuing the first time threshold and / or the outlet pressure of the compressor 1 reaching the first pressure threshold, the pressure of the external condenser is gradually increased, the gas-phase refrigerant is replaced by the liquid-phase refrigerant, the refrigerant accumulated in the external condenser is reduced, and the working circuit is ensured to have sufficient refrigerant. In this way, the refrigerant is adjusted by controlling the opening and closing of the second control valve and the first control valve, without increasing the hardware, and the cost increase of the thermal management system is avoided.

[0066] In a possible design, the thermal management system 100 further comprises a cooling fan and an active air inlet grille. The thermal management system 100 is further configured to: before the compressor 1 runs for the first time threshold and / or the discharge pressure of the compressor 1 is greater than or equal to the first pressure threshold, the cooling fan is closed and / or the active air inlet grille is closed.

[0067] It can be understood that in a low-temperature environment, the heat pump is started, the second control valve 10 is closed, and the first control valve 2 is opened. Further, in the case of continuing the first time threshold and / or the outlet pressure of the compressor 1 reaching the first pressure threshold, the first control valve is closed and the second control valve is opened. In this way, the pressure of the external condenser 3 is gradually increased, the gas-phase refrigerant is replaced by the liquid-phase refrigerant, the liquid refrigerant accumulated in the external condenser is reduced, and the working circuit is ensured to have sufficient refrigerant. In this way, the refrigerant is adjusted by controlling the opening and closing of the second control valve 10 and the first control valve 2, without increasing the hardware, and the cost increase of the thermal management system 100 is avoided.

[0068] In a possible design, the thermal management system 100 is further configured to: in a case where the current temperature is greater than or equal to the second temperature threshold and the refrigeration working condition is started, open the first control valve 2 and close the second control valve 10. In a case where the exhaust pressure of the compressor 1 is greater than or equal to the second pressure threshold and the duration is greater than or equal to the second duration threshold, open the second control valve 10, and in a case where the second control valve 10 is opened for a first duration, close the second control valve 10.

[0069] As shown in the example, Figure 3 As shown in the example,

[0070] S20, start the refrigeration working condition.

[0071] S21, open the first control valve 2 and close the second control valve 10.

[0072] In some embodiments, in a case where the current temperature is greater than or equal to the second temperature threshold, the first control valve 2 is opened and the second control valve 10 is closed.

[0073] S22, determine whether the exhaust pressure of the compressor 1 is greater than or equal to the second pressure threshold.

[0074] If yes, perform S23. If no, continue to determine whether the exhaust pressure of the compressor 1 is greater than or equal to the second pressure threshold.

[0075] S23, determine whether the duration is greater than or equal to the second duration threshold.

[0076] In some embodiments, in a case where the exhaust pressure of the compressor 1 is greater than or equal to the second pressure threshold, it is determined whether the duration that the exhaust pressure of the compressor 1 is greater than or equal to the second pressure threshold is greater than or equal to the second duration threshold.

[0077] If yes, perform S24. If no, continue to determine whether the duration is greater than or equal to the second duration threshold.

[0078] S24, open the second control valve 10.

[0079] S25, determine whether the opening duration of the second control valve 10 is greater than or equal to a sixth preset duration.

[0080] In some embodiments, in a case where the second control valve 10 is opened, the compressor 1 is controlled to operate at a second rotating speed. Further, it is determined whether the opening duration of the second control valve 10 is greater than or equal to the sixth preset duration.

[0081] If yes, S26 is executed. If no, it is determined whether the opening duration of the second control valve 10 is greater than or equal to the sixth preset duration.

[0082] S26, the second control valve 10 is closed.

[0083] It can be understood that, in the high-temperature environment starting cooling working condition (such as cooling the passenger cabin or the battery), the first control valve 2 is opened, and the second control valve 10 is closed. And in the case of detecting that the system pressure ≥ P3, the second control valve 10 is opened, the compressor is controlled to operate at the second rotating speed, and in the case of double opening and continuous operation for the sixth preset duration, the second control valve 10 is closed. In this way, the high-pressure relief of the thermal management system 100 is realized, the compressor 1 is prevented from stopping due to high pressure protection, and the influence on the comfort of the passenger cabin is reduced.

[0084] In a possible design, the thermal management system 100 is further configured to: in the case of starting the refrigeration working condition, the first control valve 2 and the second control valve 10 are opened. In the case that the compressor 1 operates for a third duration threshold and / or the exhaust pressure of the compressor 1 is greater than or equal to a third pressure threshold, the second control valve 10 is closed.

[0085] For example, as shown in FIG. 5, a refrigerant adjustment method flowchart of a thermal management system 100 is shown, including S30-S35. Figure 4

[0086] S30, starting the refrigeration working condition.

[0087] S31, opening the second control valve 10 and the first control valve 2.

[0088] In some embodiments, in the case that the current temperature is greater than or equal to a second temperature threshold, the first control valve 2 is opened and the second control valve 10 is opened.

[0089] S32, controlling the compressor 1 to operate at a third rotating speed.

[0090] S33, determining whether the operating time of the compressor 1 at the third rotating speed is greater than or equal to a third duration threshold.

[0091] If no, S34 is executed. If yes, S35 is executed.

[0092] S34, determining whether the exhaust pressure of the compressor 1 is greater than or equal to a third pressure threshold.

[0093] If yes, S35 is executed. If no, it is determined whether the operating time of the compressor 1 at the third rotating speed is greater than or equal to the third duration threshold.

[0094] S35, the second control valve 10 is closed.

[0095] ​In another case, after S31, it is judged whether the discharge pressure of the compressor 1 is greater than or equal to a third pressure threshold value, and if yes, the second control valve 10 is closed.

[0096] In another case, the second control valve 10 is closed when the compressor 1 runs at the third rotational speed for a time greater than or equal to a third time threshold value and the discharge pressure of the compressor 1 is greater than or equal to the third pressure threshold value.

[0097] It can be understood that when the refrigeration working condition is started, the first control valve 2 and the second control valve 10 are opened, the active air inlet grille is opened, the condenser fan is opened, and the second control valve 10 is closed when the compressor 1 runs for the third time threshold value and / or the discharge pressure of the compressor 1 is greater than or equal to the third pressure threshold value. In this way, it is avoided that a large amount of liquid refrigerant or a certain pressure of gaseous refrigerant is accumulated in the second circuit, and it is ensured that there is a suitable amount of refrigerant when the first circuit operates.

[0098] In a possible design, the thermal management system 100 is further configured to: in the refrigeration working condition, open the second control valve 10 when the suction pressure of the thermal management system 100 is less than or equal to a fourth pressure threshold value and the rotational speed of the compressor 1 is less than or equal to a first rotational speed threshold value. In a case where the time length during which the second control valve 10 is opened is greater than or equal to a first preset time length, the second control valve 10 is closed.

[0099] As shown in FIG. 4, a refrigerant adjustment method flowchart of a thermal management system 100 is shown, which includes S40-S45. Figure 5

[0100] S40, in the refrigeration working condition, the first control valve 2 is opened and the second control valve 10 is closed.

[0101] In some embodiments, in response to a user clicking a refrigeration operation, the first control valve 2 is opened and the second control valve 10 is closed, and the refrigeration working condition is entered.

[0102] S41, it is judged whether the suction pressure of the thermal management system 100 is less than or equal to a fourth pressure threshold value.

[0103] If yes, S42 is performed. If no, it is continuously judged whether the suction pressure of the thermal management system 100 is less than or equal to the fourth pressure threshold value.

[0104] S42, it is judged whether the rotational speed of the compressor 1 is less than or equal to a first rotational speed threshold value.

[0105] If yes, S43 is performed. If no, it is continuously judged whether the rotational speed of the compressor 1 is less than or equal to the first rotational speed threshold value.

[0106] S43, the second control valve 10 is opened.​

[0107] In some embodiments, the second control valve 10 is opened when the rotation speed of the compressor 1 is less than or equal to the first rotation speed threshold.

[0108] In some other embodiments, the second control valve 10 is opened when the rotation speed of the compressor 1 is less than or equal to the first rotation speed threshold, a first rotation speed duration is obtained by timing, and the first rotation speed duration is greater than or equal to a seventh duration threshold.

[0109] S44, determining whether the time when the second control valve 10 is opened is greater than or equal to a first preset duration.

[0110] In some embodiments, the time when the second control valve 10 is opened is timed when the second control valve 10 is opened, and it is determined whether the time when the second control valve 10 is opened is greater than or equal to the first preset duration. If yes, S45 is executed.

[0111] S45, closing the second control valve 10.

[0112] It can be understood that in the refrigeration working condition, the second control valve 10 is closed, and the first control valve 2 is opened. In the normal operation process of the thermal management system 100, the second control valve 10 is opened when the suction pressure is less than or equal to the fourth pressure threshold and the actual rotation speed of the compressor 1 is lower than the first rotation speed threshold. Subsequently, the second control valve 10 is closed when the duration of the double opening of the first control valve 2 and the second control valve 10 is greater than or equal to the sixth duration threshold, so that the thermal management system 100 is normally operated.

[0113] In a possible design, the thermal management system 100 further comprises a throttling device, and the thermal management system 100 is further configured to: in the refrigeration working condition, open the second control valve 10 when the suction superheat degree of the compressor 1 is less than or equal to a first superheat degree threshold and the opening degree of the throttling device is less than or equal to a first opening degree threshold, and close the second control valve 10 when the time when the second control valve 10 is opened is greater than or equal to a fourth duration threshold.

[0114] As shown in FIG. 5, a refrigerant adjustment method flowchart of a thermal management system 100 is shown, which comprises S50-S55. Figure 6

[0115] S50, in the refrigeration working condition, the first control valve 2 is opened and the second control valve 10 is closed.

[0116] In some embodiments, in response to the user clicking the refrigeration operation, the first control valve 2 is opened and the second control valve 10 is closed, and the refrigeration working condition is entered.

[0117] ​S51, judge whether the suction gas superheat degree of the compressor 1 is less than or equal to the first superheat degree threshold value.

[0118] If yes, execute S52. If no, continue to judge whether the suction gas superheat degree of the compressor 1 is less than or equal to the first superheat degree threshold value.

[0119] S52, judge whether the opening degree of the throttling device is less than or equal to the first opening degree threshold value.

[0120] If yes, execute S53. If no, continue to judge whether the opening degree of the throttling device is less than or equal to the first opening degree threshold value. The throttling device in this step can be the first throttling device 6 or the second throttling device 8, which is not limited in the embodiments of the present application.

[0121] S53, open the second control valve 10.

[0122] In some embodiments, the second control valve 10 is opened when the opening degree of the throttling device is less than or equal to the first opening degree threshold value.

[0123] In some other embodiments, the second control valve 10 is opened when the opening degree of the throttling device is less than or equal to the first opening degree threshold value, a second rotation speed time length is obtained by starting timing, and the second control valve 10 is opened when the second rotation speed time length is greater than or equal to an eighth time length threshold value.

[0124] S54, judge whether the time when the second control valve 10 is opened is greater than or equal to a fourth time length threshold value.

[0125] In some embodiments, the time when the second control valve 10 is opened is timed when the second control valve 10 is opened, and it is judged whether the time when the second control valve 10 is opened is greater than or equal to the fourth time length threshold value. If yes, execute S55.

[0126] S55, close the second control valve 10.

[0127] It can be understood that the first control valve 2 is opened and the second control valve 10 is closed in the refrigeration working condition. In the case that the suction gas superheat degree of the compressor 1 is lower than the target superheat degree and the opening degree of the throttling device is the minimum opening degree, the second control valve 10 is opened and is closed after the time when the second control valve 10 is opened is greater than or equal to the fourth time length threshold value. In this way, the amount of refrigerant in the working circuit is reduced, and the suction gas superheat degree of the compressor 1 is ensured.

[0128] In a possible design, the thermal management system 100 is further configured to: in the heating operating mode, in a case where the discharge pressure of the compressor 1 is greater than or equal to a fifth pressure threshold value and the rotation speed of the compressor 1 is less than or equal to a second rotation speed threshold value, control the compressor 1 to operate at a target rotation speed and open the first control valve 2. In a case where the open time of the first control valve 2 is greater than or equal to a fourth time threshold value, close the second control valve 10. And close the second control valve 10.

[0129] In some embodiments, the fifth pressure value is positively correlated with the second rotation speed threshold value.

[0130] For example, as shown in FIG. 6, a refrigerant adjustment method flowchart of a thermal management system 100 is shown, including: S60-S65. Figure 7

[0131] S60, in the heating operating mode, the second control valve 10 is opened and the first control valve 2 is closed.

[0132] In some embodiments, in response to a user clicking a heating button operation, the second control valve 10 is opened and the first control valve 2 is closed to enter the heating operating mode.

[0133] S61, determine whether the discharge pressure of the thermal management system 100 is greater than or equal to a fifth pressure threshold value.

[0134] If yes, perform S62. If no, continue to determine whether the discharge pressure of the thermal management system 100 is greater than or equal to the fifth pressure threshold value.

[0135] S62, determine whether the rotation speed of the compressor 1 is less than or equal to a second rotation speed threshold value.

[0136] If yes, perform S63. If no, continue to determine whether the rotation speed of the compressor 1 is less than or equal to the second rotation speed threshold value.

[0137] S63, open the first control valve 2.

[0138] In some embodiments, in a case where the rotation speed of the compressor is less than or equal to the second rotation speed threshold value, the first control valve 2 is opened.

[0139] In some other embodiments, in a case where the rotation speed of the compressor is less than or equal to the second rotation speed threshold value, start timing, obtain a third rotation speed time length, and in a case where the third rotation speed time length is greater than or equal to a ninth time threshold value, control the compressor 1 to operate at a fourth rotation speed and open the first control valve 2.

[0140] S64, determine whether the time for which the first control valve 2 is opened is greater than or equal to a second preset time length.

[0141] ​In some embodiments, in the case that the first control valve 2 is opened, the time when the first control valve 2 is opened is counted, and it is determined whether the time when the first control valve 2 is opened is greater than or equal to the second preset time length. If yes, S65 is executed. If no, it is continuously determined whether the time when the first control valve 2 is opened is greater than or equal to the second preset time length.

[0142] S65, the first control valve 2 is closed.

[0143] It can be understood that in the heat pump working condition, the first control valve 2 is closed and the second control valve 10 is opened in normal operation. When the exhaust pressure is detected to be too large and the compressor speed is small at this time, the first control valve 2 is opened for a certain time length and then closed. In this way, the excessive refrigerant in the second circuit is discharged to the first circuit.

[0144] In a possible design, the thermal management system 100 further comprises a first water-cooled heat exchanger 7, and the thermal management system 100 is further configured to: in the heating working condition, in the case that the suction pressure of the thermal management system 100 is less than or equal to a sixth pressure threshold, the speed of the compressor 1 is less than or equal to a third speed threshold, and the inlet water temperature of the first water-cooled heat exchanger 7 is greater than or equal to a third temperature threshold, the first control valve 2 is opened, and in the case that the time length when the first control valve 2 is opened is greater than or equal to a fifth time length threshold, the first control valve 2 is closed.

[0145] For example, as shown in FIG. 7, a refrigerant adjustment method flowchart of a thermal management system 100 is shown, which comprises S70-S76. Figure 8

[0146] S70, in the heating working condition, the second control valve 10 is opened and the first control valve 2 is closed.

[0147] In some embodiments, in response to a user clicking a heating button operation, the second control valve 10 is opened and the first control valve 2 is closed, and the heating working condition is entered.

[0148] S71, it is determined whether the suction pressure of the thermal management system 100 is less than or equal to a sixth pressure threshold.

[0149] If yes, S72 is executed. If no, it is continuously determined whether the suction pressure of the thermal management system 100 is less than or equal to the sixth pressure threshold.

[0150] S72, it is determined whether the speed of the compressor 1 is less than or equal to a third speed threshold.

[0151] If yes, S73 is executed. If no, it is continuously determined whether the speed of the compressor 1 is less than or equal to the third speed threshold.

[0152] ​S73, determining whether the water inlet temperature of the first water-cooled heat exchanger 7 is greater than or equal to a third temperature threshold.

[0153] If yes, S74 is executed. If no, it continues to determine whether the water inlet temperature of the first water-cooled heat exchanger 7 is greater than or equal to the third temperature threshold.

[0154] S74, opening the first control valve 2.

[0155] In some embodiments, the first control valve 2 is opened when the water inlet temperature of the water-cooled heat exchanger is greater than or equal to the third temperature threshold.

[0156] In some other embodiments, the first control valve 2 is opened when the water inlet temperature of the water-cooled heat exchanger is greater than or equal to the third temperature threshold, a fourth rotation time length is obtained by starting timing, and the first control valve 2 is opened when the fourth rotation time length is greater than or equal to a third preset time length.

[0157] S75, determining whether the time when the first control valve 2 is opened is greater than or equal to a fifth time length threshold.

[0158] In some embodiments, the time when the first control valve 2 is opened is timed when the first control valve 2 is opened, and it is determined whether the time when the first control valve 2 is opened is greater than or equal to the fifth time length threshold. If yes, S76 is executed. If no, it continues to determine whether the time when the first control valve 2 is opened is greater than or equal to the fifth time length threshold.

[0159] S76, closing the first control valve 2.

[0160] It can be understood that the heat pump working condition, the second control valve 10 is opened, and the first control valve 2 is closed. In the case that the suction pressure of the thermal management system 100 is less than or equal to the sixth pressure threshold, the rotation speed of the compressor 1 is less than or equal to the third rotation speed threshold, and the water inlet temperature of the first water-cooled heat exchanger 7 is greater than or equal to the third temperature threshold, the first control valve 2 is opened, and the first control valve 2 is closed when the first control valve is opened for a certain time length. In this way, in the state that the first control valve 2 and the second control valve 10 are opened, the refrigerant in the first circuit (non-working circuit) is partially recovered.

[0161] In a possible design, the thermal management system 100 further comprises a throttling device, and the thermal management system 100 is further configured to, in the heating working condition, open the first control valve 2 when the suction superheat degree of the compressor 1 is less than or equal to the second superheat degree threshold and the opening degree of the throttling device is less than or equal to the second opening degree threshold, and close the first control valve 2 when the first control valve 2 is opened for a time length greater than or equal to a sixth time length threshold.

[0162] For example, Figure 9As shown, a refrigerant adjustment flowchart of a thermal management system 100 is shown, including: S80-S85.

[0163] S80, in the heating operating condition, the second control valve 10 is opened and the first control valve 2 is closed.

[0164] In some embodiments, in response to the user clicking the heating button operation, the second control valve 10 is opened and the first control valve 2 is closed, and the heating operating condition is entered.

[0165] S81, it is judged whether the suction superheat degree of the compressor 1 is less than or equal to the second superheat threshold.

[0166] If yes, S82 is executed. If no, it is continuously judged whether the suction superheat degree of the compressor 1 is less than or equal to the second superheat threshold.

[0167] S82, it is judged whether the opening degree of the throttling device is less than or equal to the second opening threshold.

[0168] If yes, S83 is executed. If no, it is continuously judged whether the opening degree of the throttling device is less than or equal to the second opening threshold. The throttling device in this step can be the first throttling device 6 or the second throttling device 8, which is not limited in the embodiments of the present application.

[0169] S83, the first control valve 2 is opened.

[0170] In some embodiments, the first control valve 2 is opened when the opening degree of the throttling device is less than or equal to the second opening threshold.

[0171] In other embodiments, when the opening degree of the throttling device is less than or equal to the second opening threshold, the timing is started to obtain the fifth rotating speed time length, and the first control valve 2 is opened when the fifth rotating speed time length is greater than or equal to the fourth preset time length.

[0172] S84, it is judged whether the time of opening the first control valve 2 is greater than or equal to the sixth time threshold.

[0173] In some embodiments, the time of opening the first control valve 2 is timed when the first control valve 2 is opened, and it is judged whether the time of opening the first control valve 2 is greater than or equal to the sixth time threshold. If yes, S85 is executed.

[0174] S85, the first control valve 2 is closed.

[0175] It can be understood that, in the heat pump working condition, the second control valve 10 is opened, the first control valve 2 is closed, in the low load working condition, the detected suction superheat degree of the compressor is lower than the target superheat degree, and at this time, the opening degree of the throttling device is the minimum opening degree, the first control valve 2 is opened for a certain time length, and in the case that the time of opening the first control valve 2 is greater than or equal to the sixth time length threshold, the first control valve 2 is closed.

[0176] In a possible design, as shown in FIG. 1, the first circuit further includes a third control valve 4, a first throttling device 6, a first water-cooled heat exchanger 7, and a gas-liquid separator 14. The inlet of the third control valve 4 is connected with the outlet of the external condenser, the outlet of the third control valve 4 is connected with the inlet of the first throttling device 6, the outlet of the first throttling device 6 is connected with the inlet of the first water-cooled heat exchanger 7, and the outlet of the first water-cooled heat exchanger 7 is connected with the inlet of the gas-liquid separator 14. The outlet of the gas-liquid separator 14 is connected with the inlet of the compressor 1. Figure 10 In a possible design, as shown in FIG. 1, the first circuit further includes a third control valve 4, a first throttling device 6, a first water-cooled heat exchanger 7, and a gas-liquid separator 14. The inlet of the third control valve 4 is connected with the outlet of the external condenser, the outlet of the third control valve 4 is connected with the inlet of the first throttling device 6, the outlet of the first throttling device 6 is connected with the inlet of the first water-cooled heat exchanger 7, and the outlet of the first water-cooled heat exchanger 7 is connected with the inlet of the gas-liquid separator 14. The outlet of the gas-liquid separator 14 is connected with the inlet of the compressor 1.

[0177] Figure 10 In a possible design, as shown in FIG. 1, the first circuit further includes a third control valve 4, a first throttling device 6, a first water-cooled heat exchanger 7, and a gas-liquid separator 14. The inlet of the third control valve 4 is connected with the outlet of the external condenser, the outlet of the third control valve 4 is connected with the inlet of the first throttling device 6, the outlet of the first throttling device 6 is connected with the inlet of the first water-cooled heat exchanger 7, and the outlet of the first water-cooled heat exchanger 7 is connected with the inlet of the gas-liquid separator 14. The outlet of the gas-liquid separator 14 is connected with the inlet of the compressor 1.

[0178] In a possible design, as shown in FIG. 1, the first circuit further includes a third control valve 4, a first throttling device 6, a first water-cooled heat exchanger 7, and a gas-liquid separator 14. The inlet of the third control valve 4 is connected with the outlet of the external condenser, the outlet of the third control valve 4 is connected with the inlet of the first throttling device 6, the outlet of the first throttling device 6 is connected with the inlet of the first water-cooled heat exchanger 7, and the outlet of the first water-cooled heat exchanger 7 is connected with the inlet of the gas-liquid separator 14. The outlet of the gas-liquid separator 14 is connected with the inlet of the compressor 1. Figure 11 In a possible design, as shown in FIG. 1, the first circuit further includes a third control valve 4, a first throttling device 6, a first water-cooled heat exchanger 7, and a gas-liquid separator 14. The inlet of the third control valve 4 is connected with the outlet of the external condenser, the outlet of the third control valve 4 is connected with the inlet of the first throttling device 6, the outlet of the first throttling device 6 is connected with the inlet of the first water-cooled heat exchanger 7, and the outlet of the first water-cooled heat exchanger 7 is connected with the inlet of the gas-liquid separator 14. The outlet of the gas-liquid separator 14 is connected with the inlet of the compressor 1.

[0179] Figure 11 In a possible design, as shown in FIG. 1, the first circuit further includes a third control valve 4, a first throttling device 6, a first water-cooled heat exchanger 7, and a gas-liquid separator 14. The inlet of the third control valve 4 is connected with the outlet of the external condenser, the outlet of the third control valve 4 is connected with the inlet of the first throttling device 6, the outlet of the first throttling device 6 is connected with the inlet of the first water-cooled heat exchanger 7, and the outlet of the first water-cooled heat exchanger 7 is connected with the inlet of the gas-liquid separator 14. The outlet of the gas-liquid separator 14 is connected with the inlet of the compressor 1.​​

[0180] In addition, in combination with Figure 10 The refrigerant circuit of the thermal management system 100 in the embodiments of the present application is connected to the following four circulation circuits.

[0181] Circulation circuit 1: compressor 1→ first control valve 2→ external condenser 3→ third control valve 4→ high-pressure liquid storage tank 5→ first throttling device 6→ first water-cooled heat exchanger 7→ compressor 1.

[0182] Circulation circuit 2: compressor 1→ first control valve 2→ external condenser 3→ third control valve 4→ high-pressure liquid storage tank 5→ second throttling device 8→ in-vehicle heat exchanger 9→ compressor 1.

[0183] Circulation circuit 3: compressor 1→ second control valve 10→ built-in condenser 11→ second water-cooled heat exchanger 12→ fourth control valve 13→ high-pressure liquid storage tank 5→ first throttling device 6→ water-cooled heat exchanger 7→ compressor 1.

[0184] Circulation circuit 4: compressor 1→ second control valve 10→ built-in condenser 11→ second water-cooled heat exchanger 12→ fourth control valve 13→ high-pressure liquid storage tank 5→ second throttling device 8→ in-vehicle heat exchanger 9→ compressor 1.

[0185] In some embodiments, control valve 2→ external condenser 3→ control valve 4 is circulation branch 1; control valve 10→ built-in condenser→ water-cooled heat exchanger 12→ control valve 13 is circulation branch 2; throttling device 6→ water-cooled heat exchanger 7 is circulation branch 3; throttling device 8→ in-vehicle heat exchanger 9 is circulation branch 4. Circulation branch 1 is used to dissipate heat to the outside world from the refrigerant circuit, circulation branch 2 is used for passenger cabin heating and battery heating, circulation branch 3 is used for passenger cabin refrigeration or dehumidification, and circulation branch 4 is used for battery cooling or water circuit waste heat recovery.

[0186] In combination with Figure 10In this embodiment of the thermal management system 100, the compressor 1 outlet is connected to two control valves: a first control valve 2 and a second control valve 10. The first control valve 2 and the second control valve 10 control the flow of refrigerant to the external condenser 3 or the internal condenser 11, or both simultaneously. When the passenger compartment or battery needs cooling, the first control valve 2 opens, and the refrigerant enters the external condenser 3. The high-temperature, high-pressure gaseous refrigerant releases heat to the outside air, becoming a high-temperature, high-pressure liquid or gas-liquid mixture of refrigerant. After passing through the third control valve 4, it enters the high-pressure liquid storage tank 5, where gas-liquid separation occurs. The liquid refrigerant passes through the first throttling device 6 to become a low-temperature, low-pressure refrigerant, absorbing heat in the in-vehicle heat exchanger 9 to cool the passenger compartment; or, after passing through the throttling device 7, it cools the heat transfer medium entering the battery in the water-cooled heat exchanger, thus cooling the battery. When the passenger compartment or battery requires heating, the second control valve 10 opens, and the high-temperature, high-pressure gaseous refrigerant releases heat to the passenger compartment through the built-in condenser 11, or releases heat to the heat transfer medium entering the battery in the water-cooled heat exchanger 12, thereby heating the passenger compartment, the battery, or both simultaneously. After being cooled, the refrigerant enters the gas-liquid separator 5 through the control valve 13, and can then either pass through the throttling component 8 to enter the vehicle interior heat exchanger 9 to dehumidify the passenger compartment, or pass through the water-cooled heat exchanger 7 to absorb heat from the water side and maintain the normal operation of the entire heat pump cycle.

[0187] In some embodiments, combined with Figure 10 ,like Figure 12 as well as Figure 13 As shown, the thermal management system 100 in this embodiment further includes: a third water-cooled heat exchanger 15, an electric drive assembly 16, a first water pump 17, a second water pump 18, a battery assembly 19, and a multi-way valve 20. The multi-way valve 20 includes multiple ports: 201, 202, 203, 204, 205, 206, 207, 208, and 209. The multi-way valve 20 is connected to the first water-cooled heat exchanger 17, the second water pump 18, the battery assembly 19, the second water-cooled heat exchanger 12, and the third water-cooled heat exchanger 15, respectively. The second water pump 18 is connected to the battery assembly 19. The electric drive assembly 16 is connected to the first water pump 17. The third water-cooled heat exchanger 15 is connected to the electric drive assembly 16.

[0188] exist Figure 12 The diagram shows the water circuit connection flow of the thermal management system 100 under cooling conditions. Specifically, the water circuit under cooling conditions is as follows: multi-way valve 20, port 201 → second water pump 18 → battery assembly 19 → multi-way valve 202 port → multi-way valve 208 port → first water-cooled heat exchanger 7 → multi-way valve 209 port → multi-way valve 20, port 201.

[0189] Multi-port valve 20's 203 port → Multi-port valve 204 port → Second water-cooled heat exchanger 12 → Multi-port valve 203 port.

[0190] The 205 interface of the multi-way valve 20 → the third water-cooled heat exchanger 15 → the electric drive assembly 16 → the first water pump 17 → the 207 interface of the multi-way valve 207 → the 205 interface of the multi-way valve 205.

[0191] Figure 13 The water circuit in the heating working condition can realize battery cooling and electric drive assembly heat dissipation.

[0192] In the heating working condition, the water circuit is as follows: Figure 13 In the heating working condition, the water circuit is as follows:

[0193] The 201 interface of the multi-way valve 20 → the second water pump 18 → the battery assembly 19 → the 202 interface of the multi-way valve 202 → the 203 interface of the multi-way valve 203 → the second water-cooled heat exchanger 12 → the 204 interface of the multi-way valve 204 → the 201 interface of the multi-way valve 201.

[0194] The 206 interface of the multi-way valve 20 → the electric drive assembly 16 → the first water pump 17 → the 207 interface of the multi-way valve 207 → the 208 interface of the multi-way valve 208 → the first water-cooled heat exchanger 7 → the 209 interface of the multi-way valve 209 → the 206 interface of the multi-way valve 206. Figure 13 The water circuit in the heating working condition can realize battery cooling and electric drive assembly heat dissipation.

[0195] The third control valve 4 and the fourth control valve 13 in the embodiment can be one-way valves, so as to prevent high-temperature and high-pressure liquid refrigerant from entering a non-working circuit and reduce refrigerant charging amount of the system. The first control valve 2 and the second control valve 10 can be normally open stop valves, so as to ensure that the pressure of the thermal management system 100 can be balanced as soon as possible after shutdown, and also prevent high-pressure shutdown of the system when the stop valve fails.

[0196] As shown in FIG. 1, the thermal management system 100 includes a compressor 1, a first control valve 2, an external condenser 3, a third control valve 4, a second control valve 10, an internal condenser 11, a second water-cooled heat exchanger 12, a fourth control valve 13, a multi-way valve 20, a first water pump 17, a second water pump 18, a battery assembly 19, an electric drive assembly 16, a first water-cooled heat exchanger 7, a second water-cooled heat exchanger 15, a high-pressure liquid tank 5, and a gas-liquid separator 14. Figure 11 In the thermal management system 100, the gas-liquid separator 14 is adopted, so as to ensure the superheat degree of the compressor 1 inlet and reduce the risk of liquid hammer of the compressor 1.

[0197] As shown in FIG. 1, the thermal management system 100 includes a compressor 1, a first control valve 2, an external condenser 3, a third control valve 4, a second control valve 10, an internal condenser 11, a second water-cooled heat exchanger 12, a fourth control valve 13, a multi-way valve 20, a first water pump 17, a second water pump 18, a battery assembly 19, an electric drive assembly 16, a first water-cooled heat exchanger 7, a second water-cooled heat exchanger 15, a high-pressure liquid tank 5, and a gas-liquid separator 14. Figure 10 In the thermal management system 100, the high-pressure liquid tank 5 is adopted, so as to ensure that the refrigerant entering the throttling device is liquid refrigerant, and reduce refrigerant noise caused by gas-liquid two-phase refrigerant entering the throttling device due to insufficient heat exchange.

[0198] The thermal management system 100 in the embodiment includes two high-pressure circuits. The high-pressure circuit 1 is: the first control valve 2 → the external condenser 3 → the third control valve 4. The high-pressure circuit 2 is: the second control valve 10 → the internal condenser 11 → the second water-cooled heat exchanger 12 → the fourth control valve 13.

[0199] The thermal management system 100 in the embodiments of the present application can realize passenger cabin cooling, dehumidification, heating, battery cooling and heating through the combination of the refrigerant circuit and the water circuit.

[0200] It should be noted that the first duration threshold, the second duration threshold, the third duration threshold, the fourth duration threshold, the fifth duration threshold, the sixth duration threshold, the seventh duration threshold, the eighth duration threshold, the ninth duration threshold, the first preset duration, the second preset duration, the third preset duration, the fourth preset duration, the fifth preset duration, the sixth preset duration, the first pressure threshold, the second pressure threshold, the third pressure threshold, the fourth pressure threshold, the fifth pressure threshold, the sixth pressure threshold, the first rotation speed threshold, the second rotation speed threshold, and the third rotation speed threshold in the embodiments of the present application are pre-set by operation and maintenance personnel, and the embodiments of the present application are not limited.

[0201] In addition, the embodiments of the present application also provide a vehicle comprising the thermal management system 100 as described above.

Claims

1. A thermal management system, characterized by, The heat management system comprises a first water-cooled heat exchanger, a throttling device, a compressor, and a first circuit and a second circuit connected to an outlet of the compressor; The first circuit comprises a first control valve and an external condenser, and the first control valve is connected to the compressor and the external condenser respectively; The second circuit comprises a second control valve and an internal condenser, and the second control valve is connected to the compressor and the internal condenser respectively; The heat management system is configured to: In the case that the current temperature is less than or equal to a first temperature threshold and a heating operating mode is started, the first control valve is opened and the second control valve is closed; In the case that the compressor runs for a first time threshold and / or the exhaust pressure of the compressor is greater than or equal to a first pressure threshold, the first control valve is closed and the second control valve is opened to replace the liquid-phase refrigerant with the gas-phase refrigerant and reduce the refrigerant accumulated in the external condenser; In the case that the first control valve is in a closed state and the second control valve is in an opened state in the heating operating mode, the suction pressure of the compressor is less than or equal to a sixth pressure threshold, the rotating speed of the compressor is less than or equal to a third rotating speed threshold, and the inlet water temperature of the first water-cooled heat exchanger is greater than or equal to a third temperature threshold, the first control valve is opened, and in the case that the first control valve is opened for a time greater than or equal to a fifth time threshold, the first control valve is closed; In the case that the first control valve is in a closed state and the second control valve is in an opened state in the heating operating mode, the suction superheat of the compressor is less than or equal to a second superheat threshold and the opening degree of the throttling device is less than or equal to a second opening degree threshold, the first control valve is opened, and in the case that the first control valve is opened for a time greater than or equal to a sixth time threshold, the first control valve is closed.

2. The thermal management system of claim 1, wherein, The heat management system further comprises a cooling fan and an active intake grille, and the heat management system is further configured to: Before the compressor runs for a first time threshold and / or the exhaust pressure of the compressor is greater than or equal to a first pressure threshold, the cooling fan and / or the active intake grille are closed.

3. The thermal management system of claim 1 or 2, wherein, The heat management system is further configured to: In the case that the current temperature is greater than or equal to a second temperature threshold and a cooling operating mode is started, the first control valve is opened and the second control valve is closed; In the case that the exhaust pressure of the compressor is greater than or equal to a second pressure threshold and the duration is greater than or equal to a second time threshold, the second control valve is opened, and in the case that the second control valve is opened for a sixth time, the second control valve is closed.

4. The thermal management system of claim 1, wherein, The heat management system is further configured to: In the case that a cooling operating mode is started, the first control valve and the second control valve are opened; In the case that the compressor runs for a third time threshold and / or the exhaust pressure of the compressor is greater than or equal to a third pressure threshold, the second control valve is closed.

5. The thermal management system of claim 4, wherein, The heat management system is further configured to: in the case that the second control valve is opened for a time duration greater than or equal to a first preset time duration, the second control valve is closed. The thermal management system is further configured to:

6. The thermal management system of claim 4, wherein, in the case that the first control valve is in an open state and the second control valve is in a closed state in a refrigeration working condition, if the suction pressure of the thermal management system is less than or equal to a fourth pressure threshold and the rotation speed of the compressor is less than or equal to a first rotation speed threshold, the second control valve is opened, and in the case that the second control valve is opened for a time duration greater than or equal to a fourth time duration threshold, the second control valve is closed. The thermal management system is further configured to:

7. The thermal management system of claim 1 or 2, wherein, in the case that the first control valve is in a closed state and the second control valve is in an open state in a heating working condition, in the case that the discharge pressure of the compressor is greater than or equal to a fifth pressure threshold and the rotation speed of the compressor is less than or equal to a second rotation speed threshold, the compressor is controlled to operate at a target rotation speed and the first control valve is opened, and in the case that the first control valve is opened for a time duration greater than or equal to a second preset time duration, the first control valve is closed. The throttling device comprises a first throttling device, and the first circuit further comprises the first water-cooled heat exchanger, a third control valve, a high-pressure liquid storage tank, and the first throttling device; 8. The thermal management system of claim 1 or 2, wherein, an outlet of the third control valve is connected with an inlet of the high-pressure liquid storage tank; an outlet of the high-pressure liquid storage tank is connected with an inlet of the first throttling device, and an outlet of the first throttling device is connected with an inlet of the first water-cooled heat exchanger; an outlet of the first water-cooled heat exchanger is connected with an inlet of the compressor. The throttling device comprises a second throttling device, and the second circuit further comprises a second water-cooled heat exchanger, a fourth control valve, the second throttling device, and an in-vehicle heat exchanger; 9. The thermal management system of claim 8, wherein, an outlet of the second water-cooled heat exchanger is connected with an inlet of the fourth control valve, and an outlet of the fourth control valve is connected with an inlet of the high-pressure liquid storage tank; an outlet of the high-pressure liquid storage tank is connected with an inlet of the second throttling device, an outlet of the second throttling device is connected with an inlet of the in-vehicle heat exchanger, and an outlet of the in-vehicle heat exchanger is connected with an inlet of the compressor. The vehicle comprises the thermal management system according to any one of claims 1-9.

10. A vehicle characterized by comprising: ​

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