Automotive thermal management system and method of controlling the same

Abstract

The embodiment of the application discloses a kind of automobile thermal management system and its control method, by setting first throttling valve in the first pipeline that the refrigerant outlet of compressor is connected with the refrigerant inlet of condenser, the exhaust pressure of compressor is increased, so as to increase the output power of compressor, improve the temperature of refrigerant, to realize the heating in the car under low temperature condition.And, the technical scheme of the application, in low temperature heating mode, the cooling liquid outlet of cooler is communicated with the cooling liquid inlet of condenser, so that cooling liquid absorbs the condensation heat of refrigerant gas condensation and is heated to reach the cooler after heat dissipation in warm air core, so that cooling liquid can provide heat for the evaporation of refrigerant in cooler, and cooling liquid is cooled after being heated in cooler and returns to condenser.It is guaranteed that refrigerant can be evaporated into gas in cooler after being output from compressor and return to compressor, so that evaporator does not need to work, so that under low temperature condition, heating in the car can also be realized.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and more particularly to an automotive thermal management system and its control method. Background Technology

[0002] A thermal management system is a comprehensive solution for controlling both heating and cooling, encompassing air conditioning, batteries, and motor control. The heat pump is a key component of the thermal management system and typically refers to the architecture of an air conditioning system.

[0003] Current new energy vehicle management systems suffer from problems such as inability to function properly at low temperatures and slow heating rates in the initial stages of operation. Summary of the Invention

[0004] This invention provides an automotive thermal management system and its control method to ensure the normal operation of the automotive thermal management system at low temperatures and to improve the heating rate during the initial operation.

[0005] In a first aspect, embodiments of the present invention provide an automotive thermal management system, comprising: a compressor, a condenser, a cooler, and a heater core;

[0006] The refrigerant outlet of the compressor and the refrigerant inlet of the condenser are connected by a first pipeline, and a first throttling valve is installed in the first pipeline;

[0007] The refrigerant outlet of the condenser is connected to the refrigerant inlet of the cooler, and the refrigerant outlet of the cooler is connected to the refrigerant inlet of the compressor.

[0008] The coolant outlet of the condenser is connected to the coolant inlet of the cooler via the heater core, and the coolant outlet of the cooler is connected to the coolant inlet of the condenser.

[0009] Optionally, the coolant inlet of the condenser and the coolant outlet of the condenser are connected by a second pipeline, and a first switching valve is installed in the second pipeline;

[0010] The coolant outlet of the heater core is also connected to the coolant inlet of the condenser.

[0011] Optionally, the automotive thermal management system also includes an evaporator, the refrigerant inlet of which is connected to the refrigerant outlet of the condenser, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the cooler via a third pipeline, in which a second throttle valve is installed.

[0012] Optionally, the refrigerant outlet of the condenser includes a first main pipe and a first branch pipe connected to the refrigerant inlet of the cooler;

[0013] The refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator via the first main pipe and the second branch pipe;

[0014] The first branch line is equipped with a third throttle valve, and the second branch line is equipped with a fourth throttle valve.

[0015] Optionally, a second switching valve is installed in the connecting pipe between the heater core and the cooler, and a third switching valve is installed in the connecting pipe between the heater core and the coolant inlet of the condenser; the refrigerant outlet of the evaporator is also connected to the refrigerant inlet of the compressor through a fourth pipe, and a fourth switching valve is installed in the fourth pipe.

[0016] Optionally, the vehicle thermal management system also includes a heat source and a first water pump, with one end of the heat source connected to the coolant inlet of the cooler via the first water pump, and the other end of the heat source connected to the coolant outlet of the cooler.

[0017] A second water pump is installed in the connecting pipe between the coolant outlet of the condenser and the heater core.

[0018] Optionally, the vehicle thermal management system also includes a radiator, with a first end of the radiator connected to the coolant outlet of the condenser, and a third water pump installed in the connecting pipe between the first end of the radiator and the coolant outlet of the condenser; the second end of the radiator is connected to the coolant inlet of the condenser.

[0019] Secondly, embodiments of the present invention also provide a control method for an automotive thermal management system, comprising:

[0020] When the temperature of the coolant in the condenser is lower than the first set temperature, the opening degree of the first throttle valve is controlled to the first opening degree to throttle the refrigerant gas output by the compressor and increase the discharge pressure of the compressor; wherein, the first opening degree is less than 100%;

[0021] Control the refrigerant output from the condenser outlet to return to the compressor through the cooler;

[0022] After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core and the cooler; the refrigerant heats the interior of the vehicle through the heater core, and the refrigerant absorbs heat and evaporates in the cooler.

[0023] Optionally, the control method of the automotive thermal management system further includes: when the temperature of the coolant in the condenser is greater than or equal to a first set temperature, controlling the opening degree of the first throttle valve to be equal to a second opening degree, wherein the second opening degree is greater than the first opening degree.

[0024] Optionally, the control methods for the automotive thermal management system also include:

[0025] When the temperature of the coolant in the condenser is lower than the second set temperature, the second throttle valve in the third pipeline connecting the refrigerant inlet of the evaporator and the cooler is opened to connect the evaporator and the cooler, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator so that the refrigerant condenses in the condenser and then enters the evaporator to condense again, and then the refrigerant evaporates in the cooler.

[0026] The heat of condensation of the refrigerant in the evaporator is used to heat the interior of the vehicle;

[0027] After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core, and the refrigerant heats the interior of the vehicle through the heater core.

[0028] This embodiment of the automotive thermal management system and its control method increases the compressor's output power and refrigerant temperature by installing a first throttle valve in the first pipeline connecting the refrigerant outlet of the compressor and the refrigerant inlet of the condenser. This increases the compressor's discharge pressure and thus achieves heating of the vehicle interior under low-temperature conditions. Furthermore, in low-temperature heating mode, the invention connects the refrigerant outlet of the condenser to the refrigerant inlet of the cooler. This allows the coolant to absorb the condensation heat from the refrigerant gas and reach the cooler. The coolant then provides heat for the refrigerant to evaporate in the cooler, ensuring that the refrigerant, after being output from the compressor, can be evaporated into gas and return to the compressor. This eliminates the need for an evaporator, enabling heating of the vehicle interior even under low-temperature conditions and ensuring the normal operation of the automotive thermal management system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an automotive thermal management system provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of another automotive thermal management system provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the automotive thermal management system provided in the embodiment of the present invention operating in enhanced heat pump mode;

[0032] Figure 4 This is a schematic diagram of the automotive thermal management system provided in the embodiment of the present invention operating in heat pump heating mode;

[0033] Figure 5 This is a schematic diagram of the automotive thermal management system provided in the embodiment of the present invention operating in heat pump heating mode;

[0034] Figure 6 This is a flowchart of a control method for an automotive thermal management system provided in an embodiment of the present invention;

[0035] Figure 7 This is a flowchart of another control method for an automotive thermal management system provided in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] This invention provides an automotive thermal management system. Figure 1 This is a schematic diagram of the structure of an automotive thermal management system provided in an embodiment of the present invention, for reference. Figure 1 The automotive thermal management system includes: a compressor 1, a condenser 2, a cooler 3, and a heater core 4; the refrigerant outlet of the compressor 1 and the refrigerant inlet of the condenser 2 are connected through a first pipeline 10, and a first throttle valve 100 is provided in the first pipeline 10; the refrigerant outlet of the condenser 2 is connected to the refrigerant inlet of the cooler 3, and the refrigerant outlet of the cooler 3 is connected to the refrigerant inlet of the compressor 1; the coolant outlet of the condenser 2 is connected to the coolant inlet of the cooler 3 through the heater core 4, and the coolant outlet of the cooler 3 is connected to the coolant inlet of the condenser 2.

[0038] The compressor 1 is a driven fluid machine that raises low-pressure gas to high-pressure gas. The compressor 1 draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses the gas, and then discharges high-temperature, high-pressure refrigerant gas through the discharge pipe, providing power for the refrigeration cycle. The discharge pipe can be the first pipe 10 connecting the compressor 1 and the condenser 2. The condenser 2 can be a liquid condenser 2.

[0039] The automotive thermal management system of this embodiment can operate in a low-temperature heating mode, wherein... Figure 1 The diagram illustrates the automotive thermal management system in low-temperature heating mode. (Reference) Figure 1 In the low-temperature heating mode of the automotive thermal management system, the refrigerant flow circuit is as follows: Compressor 1 compresses the refrigerant into high-temperature, high-pressure refrigerant gas. After being discharged from compressor 1, the refrigerant gas reaches condenser 2 through the first pipeline 10. While passing through the first pipeline 10, the refrigerant gas is throttled by the first expansion valve 100, becoming a high-temperature, medium-pressure gas. The refrigerant gas condenses in condenser 2 and then enters cooler 3. A expansion valve can be installed at the inlet of cooler 3 to throttle the refrigerant into a low-pressure two-phase flow before it enters cooler 3. After entering cooler 3, the refrigerant evaporates and finally returns to compressor 1.

[0040] The coolant flow circuit of the automotive thermal management system in this embodiment is as follows: The coolant in condenser 2 carries away the heat of condensation of the refrigerant gas in condenser 2, thus heating the coolant. The heated coolant then passes through heater core 4 to heat the vehicle interior. After passing through heater core 4, the coolant returns to condenser 2 via cooler 3.

[0041] In existing automotive thermal management systems, the condensing pressure is affected by the coolant temperature. In low-temperature environments, the initial coolant temperature is low when the car is first started, making it difficult for the compressor 1 to output power, thus preventing the thermal management system from functioning properly at low temperatures. Furthermore, in low-temperature environments, the refrigerant in the evaporator cannot absorb enough heat when the car is first started, further hindering the thermal management system's operation. Compared to existing automotive thermal management systems, the thermal management system of this embodiment incorporates a first throttling valve 100 in the first pipe 10 connecting the refrigerant outlet of the compressor 1 to the refrigerant inlet of the condenser 2. Throttling the first throttling valve 100 increases the discharge pressure of the compressor 1, thereby increasing its output power. Since the heat in both the refrigerant and coolant circuits is output through the compressor 1 in low-temperature heating mode, increasing the compressor 1's output power by adding the first throttling valve 100 raises the temperature of the refrigerant output by the compressor, thus achieving heating of the vehicle interior under low-temperature conditions and ensuring the normal operation of the automotive thermal management system under these conditions. Furthermore, in this embodiment of the vehicle thermal management system, during low-temperature heating mode, the coolant outlet of the cooler 3 is connected to the coolant inlet of the condenser 2. This allows the coolant to absorb the heat from the condensation of the refrigerant gas, rise in temperature, dissipate heat in the heater core 4, and then reach the cooler. Thus, the coolant provides heat for the refrigerant to evaporate in the cooler 3. After being cooled by heat absorption in the cooler, the coolant returns to the condenser. This ensures that the refrigerant, after being output from the compressor 1, can be evaporated into gas in the cooler 3 and return to the compressor 1, eliminating the need for the evaporator to operate. This allows for heating of the vehicle interior even under low-temperature conditions.

[0042] This embodiment of the automotive thermal management system increases the compressor's discharge pressure by installing a first throttle valve in the first pipeline connecting the compressor's refrigerant outlet and the condenser's refrigerant inlet. This increases the compressor's output power and raises the refrigerant temperature, thereby achieving heating of the vehicle interior under low-temperature conditions. Furthermore, in low-temperature heating mode, this embodiment connects the coolant outlet of the condenser to the coolant inlet of the condenser. This allows the coolant to absorb the heat of condensation from the refrigerant gas, rise in temperature, dissipate heat through the heater core, and then reach the condenser. The coolant provides heat for the refrigerant's evaporation in the condenser, and after being cooled by heat absorption in the condenser, it returns to the condenser. This ensures that the refrigerant, after being output from the compressor, can be evaporated into gas in the condenser and return to the compressor, eliminating the need for an evaporator and enabling heating of the vehicle interior even under low-temperature conditions.

[0043] Continue to refer to Figure 1 Based on the above technical solution, optionally, the coolant inlet of condenser 2 and the coolant outlet of cooler 3 are connected through a second pipeline 20, and a first switching valve 200 is provided in the second pipeline 20.

[0044] Specifically, in the low-temperature heating mode, the first switch valve 200 can be opened to connect the coolant inlet of the condenser 2 with the coolant outlet of the cooler 3. In other operating modes of the vehicle thermal management system, the first switch valve 200 can be closed to cut off the connection between the coolant inlet of the condenser 2 and the coolant outlet of the cooler 3.

[0045] Figure 2 This is a schematic diagram of another automotive thermal management system provided in an embodiment of the present invention, for reference. Figure 2 Optionally, the vehicle thermal management system also includes an evaporator 5, the refrigerant inlet of the evaporator 5 is connected to the refrigerant outlet of the condenser 2, and the refrigerant outlet of the evaporator 5 is connected to the refrigerant inlet of the cooler 3 through a third pipe 30, in which a second throttle valve 300 is provided.

[0046] The coolant outlet of the heater core 4 is also connected to the coolant inlet of the condenser 2.

[0047] The automotive thermal management system in this embodiment can also operate in enhanced heat pump mode. Figure 3 This is a schematic diagram illustrating the operation of the automotive thermal management system provided in an embodiment of the present invention in enhanced heat pump mode. (Reference) Figure 3In enhanced heat pump mode, the refrigerant flow circuit is as follows: Compressor 1 compresses the refrigerant into high-temperature, high-pressure refrigerant gas. After being discharged from compressor 1, the refrigerant gas reaches condenser 2 through the first pipe 10. While passing through the first pipe 10, the refrigerant gas is throttled by the first expansion valve 100, becoming a high-temperature, medium-pressure gas. After condensing in condenser 2, the refrigerant gas is throttled again at the refrigerant inlet of evaporator 5, becoming a low-pressure two-phase flow, and then enters evaporator 5 for further condensation. In enhanced heat pump mode, the second expansion valve 300 in the third pipe 30 opens, and the refrigerant, after being discharged from evaporator 5, reaches cooler 3, where it absorbs heat and evaporates before returning to compressor 1. The condensation of the refrigerant in evaporator 5 facilitates heat exchange, allowing the heat exchange area of ​​evaporator 5 to be used to heat the vehicle interior.

[0048] In enhanced heat pump mode, the coolant flow circuit is as follows: the coolant in condenser 2 carries away the heat of condensation from the refrigerant gas as it condenses in condenser 2, thus heating the coolant. The heated coolant then passes through heater core 4 to heat the vehicle interior. After passing through heater core 4, the coolant returns to condenser 2, where it absorbs heat and heats up again, and then passes through heater core 4 to heat the vehicle interior.

[0049] In summary, under enhanced heat pump mode, the refrigerant condenses in the evaporator 5 and uses the heat exchange area of ​​the evaporator 5 to heat the vehicle interior, while the coolant heats the vehicle interior through the heater core 4. This achieves two heat exchange processes, which can improve the heating capacity of the vehicle's thermal management system for the vehicle interior environment at low temperatures, thereby solving the problem of weak heating capacity at low temperatures.

[0050] Continue to refer to Figure 2 and Figure 3 Optionally, the refrigerant outlet of the condenser 2 includes a first main pipe 40 and a first branch pipe 41 connected to the refrigerant inlet of the cooler 3; the refrigerant outlet of the condenser 2 is connected to the refrigerant inlet of the evaporator 5 through the first main pipe 40 and the second branch pipe 42; a third throttle valve 410 is provided in the first branch pipe 41, and a fourth throttle valve 510 is provided in the second branch pipe 42.

[0051] Specifically, in low-temperature heating mode, the third throttle valve 410 can be opened and the fourth throttle valve 510 can be closed, so that the refrigerant outlet of condenser 2 is connected to the refrigerant inlet of cooler 3, while the refrigerant outlet of condenser 2 is not connected to the refrigerant inlet of evaporator 5. In enhanced heat pump mode, the third throttle valve 410 can be closed and the fourth throttle valve 510 can be opened, so that the refrigerant outlet of condenser 2 is not connected to the refrigerant inlet of cooler 3, while the refrigerant outlet of condenser 2 is connected to the refrigerant inlet of evaporator 5.

[0052] Continue to refer to Figure 2 Optionally, a second switching valve 600 is provided in the connecting pipe between the heater core 4 and the cooler 3, and a third switching valve 700 is provided in the connecting pipe between the heater core 4 and the coolant inlet of the condenser 2.

[0053] In the low-temperature heating mode, the second switch valve 600 is opened and the third switch valve 700 is closed, so that the heater core 4 is connected to the cooler 3. After the coolant is discharged from the heater core 4, it can enter the cooler 3. In the enhanced heat pump mode, the second switch valve 600 is closed and the third switch valve 700 is opened, so that the heater core 4 is connected to the coolant inlet of the condenser 2.

[0054] Continue to refer to Figure 2 The refrigerant outlet of evaporator 5 is also connected to the refrigerant inlet of compressor 1 via a fourth pipeline, which is equipped with a fourth switching valve 800. In both low-temperature heating mode and enhanced heat pump mode, the fourth switching valve 800 is closed.

[0055] Continue to refer to Figure 2 Optionally, the vehicle thermal management system also includes a heat source 6 and a first water pump 11. One end of the heat source 6 is connected to the coolant inlet of the cooler 3 through the first water pump 11, and the other end of the heat source 6 is connected to the coolant outlet of the cooler 3. A second water pump 12 is installed in the connection pipe between the coolant outlet of the condenser 2 and the heater core 4.

[0056] The heat source 6 may include the vehicle's battery and / or motor, and may also include other heat-generating structures within the vehicle. In enhanced heat pump mode, the refrigerant evaporates and absorbs heat in the cooler 3, causing the coolant to absorb heat and cool down. The cooled coolant can then enter the heat source 6 to recover heat.

[0057] Figure 2 The automotive thermal management system shown can also operate in heat pump heating mode. Figure 4 This is a schematic diagram illustrating the operation of the automotive thermal management system provided in the embodiment of the present invention in heat pump heating mode. (Reference) Figure 4 In heat pump heating mode, the refrigerant flow circuit is as follows: Compressor 1 compresses the refrigerant into high-temperature, high-pressure refrigerant gas. After being discharged from compressor 1, the refrigerant gas reaches condenser 2 for condensation through the first pipeline 10. The refrigerant discharged from condenser 2 becomes a low-pressure two-phase flow after being throttled by the third throttling valve 410, enters cooler 3 for evaporation, and finally returns to compressor 1.

[0058] The coolant flow circuit is as follows: the coolant in condenser 2 carries away the heat of condensation from the refrigerant gas as it condenses in condenser 2, thus heating the coolant. The heated coolant then passes through heater core 4 to heat the vehicle interior. After passing through heater core 4, the coolant returns to condenser 2, where it absorbs heat and heats up again before passing through heater core 4 to further heat the vehicle interior.

[0059] In heat pump heating mode, the refrigerant evaporates and absorbs heat in cooler 3, causing the coolant to absorb heat and cool down. The cooled coolant can then enter heat source 6 to recover heat.

[0060] Continue to refer to Figure 2 Optionally, the vehicle thermal management system also includes a radiator 7, the first end of which is connected to the coolant outlet of the condenser 2, and a third water pump 13 is provided in the connecting pipe between the first end of the radiator 7 and the coolant outlet of the condenser 2; the second end of the radiator 7 is connected to the coolant inlet of the condenser 2.

[0061] Figure 2 The automotive thermal management system shown can also operate in cooling mode. Figure 5 This is a schematic diagram illustrating the operation of the automotive thermal management system provided in the embodiment of the present invention in heat pump heating mode. (Reference) Figure 5 In cooling mode, the refrigerant flow circuit is as follows: Compressor 1 compresses the refrigerant into high-temperature, high-pressure refrigerant gas. After being discharged from compressor 1, the refrigerant gas reaches condenser 2 for condensation through the first pipeline 10. The refrigerant discharged from condenser 2 becomes a low-pressure two-phase flow after being throttled by the third throttling valve 410 and enters cooler 3 for evaporation. After being throttled by the fourth throttling valve 510, it becomes a low-pressure two-phase flow and enters evaporator 5 for evaporation, finally returning to compressor 1.

[0062] The coolant flow loop is as follows: the coolant in condenser 2 carries away the heat of condensation of the refrigerant gas in condenser 2, thus heating the coolant. The heated coolant is then pumped into radiator 7 by the third water pump 13, dissipates heat through radiator 7, and returns to condenser 2.

[0063] In cooling mode, in cooler 3, refrigerant evaporates and absorbs heat, cooling the coolant, which then enters heat source 6 for further cooling. In evaporator 5, refrigerant evaporates and absorbs heat, cooling the air to lower the temperature of the vehicle interior.

[0064] The throttle valve in the above embodiments of the present invention can be an electronic expansion valve.

[0065] This invention also provides a control method for an automotive thermal management system, which can be applied to the automotive thermal management system of any of the above embodiments of this invention. Figure 6This is a flowchart of a control method for an automotive thermal management system provided in an embodiment of the present invention, with reference to... Figure 6 The control method of the automotive thermal management system includes:

[0066] Step 210: When the temperature of the coolant in the condenser is lower than the first set temperature, control the opening degree of the first throttle valve to the first opening degree to throttle the refrigerant gas output by the compressor and increase the discharge pressure of the compressor; wherein, the first opening degree is less than 100%.

[0067] Specifically, when the temperature of the coolant in the condenser is lower than the first set temperature, the vehicle's thermal management system can be controlled to operate in a low-temperature heating mode. In low-temperature heating mode, by controlling the opening degree of the first throttle valve to less than 100%, the discharge pressure of the compressor is increased, thereby increasing the output power of the compressor. This, in turn, can raise the temperature of the refrigerant discharged by the compressor, allowing the vehicle's thermal management system to operate normally at low temperatures.

[0068] Step 220: Control the refrigerant output from the refrigerant outlet of the condenser to return to the compressor through the cooler.

[0069] For example, for Figure 2 The automotive thermal management system shown can control the opening of the third throttle valve.

[0070] Step 230: After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core and the cooler; the refrigerant heats the interior of the vehicle through the heater core, and the refrigerant absorbs heat and evaporates in the cooler.

[0071] For example, for Figure 2 The automotive thermal management system shown can control the second water pump to pump coolant from the condenser into the heater core, control the opening of the second switching valve in the connecting pipe between the heater core and the condenser, and control the opening of the second throttle valve in the second pipe connecting the coolant outlet of the condenser and the coolant inlet of the condenser.

[0072] The control method of the automotive thermal management system in this embodiment can correspond to the method of controlling the automotive thermal management system to operate in the low-temperature heating mode in the above embodiment.

[0073] The control method of the automotive thermal management system in this embodiment can be applied to the automotive thermal management system of any of the above embodiments of the present invention, and has the beneficial effects of the automotive thermal management system of any of the above embodiments of the present invention.

[0074] Based on the above technical solution, optionally, the control method of the automotive thermal management system further includes: when the temperature of the coolant in the condenser is greater than or equal to a first set temperature, controlling the opening degree of the first throttle valve to be equal to a second opening degree, wherein the second opening degree is greater than the first opening degree.

[0075] Specifically, when the temperature of the coolant in the condenser is greater than or equal to the first set temperature, it indicates that the temperature of the coolant in the condenser has increased. At this time, the opening degree of the first throttle valve can be controlled to be equal to the second opening degree to increase the flow rate of refrigerant through the first throttle valve per unit time, thereby reducing the output power of the compressor and reducing the power consumption of the vehicle's thermal management system.

[0076] Figure 7 This is a flowchart of another control method for an automotive thermal management system provided in an embodiment of the present invention, see reference. Figure 7 The control method of the automotive thermal management system includes:

[0077] Step 310: When the temperature of the coolant in the condenser is lower than the first set temperature, control the opening degree of the first throttle valve to the first opening degree to throttle the refrigerant gas output by the compressor and increase the discharge pressure of the compressor; wherein, the first opening degree is less than 100%; this step is the same as step 210 in the above embodiment, and will not be described again here.

[0078] Step 320: Control the refrigerant output from the refrigerant outlet of the condenser to return to the compressor through the cooler; this step is the same as step 220 in the above embodiment, and will not be described again here.

[0079] Step 330: After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core and the cooler; the refrigerant heats the vehicle interior through the heater core, and the refrigerant absorbs heat and evaporates in the cooler; this step is the same as step 230 in the above embodiment, and will not be described again here.

[0080] Step 340: When the temperature of the coolant in the condenser is lower than the second set temperature, the second throttle valve in the third pipeline connecting the refrigerant inlet of the evaporator and the cooler is opened to connect the evaporator and the cooler, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator, so that the refrigerant condenses in the condenser and then enters the evaporator to condense again, and then the refrigerant evaporates in the cooler; the heat of condensation of the refrigerant in the evaporator is used to heat the vehicle interior.

[0081] Optionally, the second set temperature can be higher than the first set temperature. This step can correspond to the situation where the temperature of the coolant in the condenser is lower than the second set temperature but higher than the first set temperature. For Figure 2The automotive thermal management system shown can open the second throttle valve to connect the evaporator and the cooler, and open the fourth throttle valve to connect the refrigerant outlet of the condenser with the refrigerant inlet of the evaporator.

[0082] Step 350: After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core, and the refrigerant heats the interior of the vehicle through the heater core.

[0083] For example, for Figure 2 The automotive thermal management system shown can control the second water pump to pump coolant from the condenser into the heater core, and control the opening of the third switch valve in the connecting pipe between the heater core and the coolant inlet of the condenser.

[0084] In this embodiment, the control method for the automotive thermal management system, steps 340-350, can correspond to the method of controlling the automotive thermal management system to operate in the enhanced heat pump mode described in the above embodiment.

[0085] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An automotive thermal management system, characterized in that, include: Includes compressor, condenser, cooler, and heater core; The refrigerant outlet of the compressor and the refrigerant inlet of the condenser are connected by a first pipeline, and a first throttling valve is provided in the first pipeline; The refrigerant outlet of the condenser is connected to the refrigerant inlet of the cooler, and the refrigerant outlet of the cooler is connected to the refrigerant inlet of the compressor. The coolant outlet of the condenser is connected to the coolant inlet of the condenser via the heater core, and the coolant outlet of the condenser is connected to the coolant inlet of the condenser. When the temperature of the coolant in the condenser is lower than the first set temperature, the opening degree of the first throttle valve is controlled to a first opening degree to throttle the refrigerant gas output by the compressor, thereby increasing the discharge pressure of the compressor; wherein, the first opening degree is less than 100%; When the temperature of the coolant in the condenser is lower than the second set temperature, the third throttle valve in the third pipeline connecting the refrigerant inlet of the evaporator and the cooler is opened to connect the evaporator and the cooler, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator, so that the refrigerant condenses in the condenser and then enters the evaporator to condense again, and then the refrigerant evaporates in the cooler; the second set temperature is higher than the first set temperature.

2. The automotive thermal management system according to claim 1, characterized in that, The coolant inlet of the condenser and the coolant outlet of the condenser are connected by a second pipeline, and a first switching valve is provided in the second pipeline.

3. The automotive thermal management system according to claim 2, characterized in that, It also includes an evaporator, the refrigerant inlet of which is connected to the refrigerant outlet of the condenser, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the cooler through a third pipeline, in which a second throttling valve is provided; The coolant outlet of the heater core is also connected to the coolant inlet of the condenser.

4. The automotive thermal management system according to claim 3, characterized in that, The refrigerant outlet of the condenser includes a first main pipe and a first branch pipe connected to the refrigerant inlet of the cooler; The refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator through the first main pipeline and the second branch pipeline; A third throttle valve is installed in the first branch pipeline, and a fourth throttle valve is installed in the second branch pipeline.

5. The automotive thermal management system according to claim 3, characterized in that, A second switching valve is provided in the connecting pipe between the heater core and the cooler, and a third switching valve is provided in the connecting pipe between the heater core and the coolant inlet of the condenser; the refrigerant outlet of the evaporator is also connected to the refrigerant inlet of the compressor through a fourth pipe, and a fourth switching valve is provided in the fourth pipe.

6. The automotive thermal management system according to claim 1, characterized in that, It also includes a heat source and a first water pump, one end of which is connected to the coolant inlet of the cooler via the first water pump, and the other end of which is connected to the coolant outlet of the cooler; A second water pump is installed in the connecting pipe between the coolant outlet of the condenser and the heater core.

7. The automotive thermal management system according to claim 1, characterized in that, It also includes a radiator, the first end of which is connected to the coolant outlet of the condenser, and a third water pump is provided in the connecting pipe between the first end of the radiator and the coolant outlet of the condenser; the second end of the radiator is connected to the coolant inlet of the condenser.

8. A control method for an automotive thermal management system, characterized in that, The automotive thermal management system includes a compressor, a condenser, a cooler, and a heater core; The refrigerant outlet of the compressor and the refrigerant inlet of the condenser are connected by a first pipeline, and a first throttling valve is provided in the first pipeline; The refrigerant outlet of the condenser is connected to the refrigerant inlet of the cooler, and the refrigerant outlet of the cooler is connected to the refrigerant inlet of the compressor. The coolant outlet of the condenser is connected to the coolant inlet of the condenser via the heater core, and the coolant outlet of the condenser is connected to the coolant inlet of the condenser. The control method includes: When the temperature of the coolant in the condenser is lower than the first set temperature, the opening degree of the first throttle valve is controlled to a first opening degree to throttle the refrigerant gas output by the compressor, thereby increasing the discharge pressure of the compressor; wherein, the first opening degree is less than 100%; The refrigerant output from the refrigerant outlet of the condenser is controlled to return to the compressor through the cooler; After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core and the cooler; the refrigerant heats the vehicle interior through the heater core, and the refrigerant absorbs heat and evaporates in the cooler; When the temperature of the coolant in the condenser is lower than the second set temperature, the third throttle valve in the third pipeline connecting the refrigerant inlet of the evaporator and the cooler is opened to connect the evaporator and the cooler, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator, so that the refrigerant condenses in the condenser and then enters the evaporator to condense again, and then the refrigerant evaporates in the cooler; the second set temperature is higher than the first set temperature.

9. The control method for an automotive thermal management system according to claim 8, characterized in that, Also includes: When the temperature of the coolant in the condenser is greater than or equal to a first set temperature, the opening degree of the first throttle valve is controlled to be equal to a second opening degree, wherein the second opening degree is greater than the first opening degree.

10. The control method for an automotive thermal management system according to claim 8, characterized in that, Also includes: The heat of condensation of the refrigerant in the evaporator is used to heat the interior of the vehicle. After the gas output from the compressor is condensed by the condenser, the coolant in the condenser is controlled to return to the condenser through the heater core, and the refrigerant heats the vehicle interior through the heater core.

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