Vehicle thermal management system, control method, electronic device and vehicle

Abstract

The invention discloses a vehicle thermal management system, a control method, an electronic device and a vehicle, relates to the technical field of vehicle control, and aims to solve the problem of low thermal management efficiency of the vehicle. The vehicle thermal management system comprises a compressor, a condenser, an air conditioner branch and a first refrigerator branch. The air conditioner branch is connected between an outlet of the condenser and an inlet of the compressor and comprises an air conditioner evaporator, a first expansion valve and a fourth expansion valve. In the extending direction of the air conditioner branch, the first expansion valve is located between an outlet of the condenser and an inlet of the air conditioner evaporator, and the fourth expansion valve is located between an outlet of the air conditioner evaporator and an inlet of the compressor. The first refrigerator branch is connected between an outlet of the condenser and an inlet of the compressor and comprises a first refrigerator evaporator and a second expansion valve, and the second expansion valve is located between an outlet of the condenser and an inlet of the first refrigerator evaporator in the extending direction of the first refrigerator branch. The vehicle thermal management system can be used for refrigeration.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a vehicle thermal management system, a control method, an electronic device and a vehicle. Background Art

[0002] The vehicle thermal management system is one of the important components of the vehicle. It can perform thermal management on the air-conditioning temperature in the cabin, the operating temperature of the battery system, and equipment such as the onboard refrigerator in the vehicle, thereby improving the riding experience of the driver and passengers.

[0003] In the related art, the onboard refrigerator of some vehicles is driven by an independent compressor without comprehensive consideration of the heat management of the air-conditioning system, and the heat management efficiency of the vehicle is low. Summary of the invention

[0004] The present application provides a vehicle thermal management system, a control method, an electronic device and a vehicle, which are used to solve the problem of low thermal management efficiency of vehicles in the prior art.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a vehicle thermal management system, including: a compressor and a condenser, an air-conditioning branch, and a first refrigerator branch. The outlet of the compressor is connected to the inlet of the condenser. The air-conditioning branch is connected between the outlet of the condenser and the inlet of the compressor, and the air-conditioning branch includes an air-conditioning evaporator, a first expansion valve, and a fourth expansion valve. Along the extension direction of the air-conditioning branch, the first expansion valve is located between the outlet of the condenser and the inlet of the air-conditioning evaporator, and the fourth expansion valve is located between the outlet of the air-conditioning evaporator and the inlet of the compressor. The first refrigerator branch is connected between the outlet of the condenser and the inlet of the compressor, and the first refrigerator branch includes a first refrigerator evaporator and a second expansion valve, and along the extension direction of the first refrigerator branch, the second expansion valve is located between the outlet of the condenser and the inlet of the first refrigerator evaporator.

[0007] The air conditioning branch and the first refrigerator branch in the vehicle thermal management system of the present application are connected in parallel, and share a compressor and condenser. In this way, the energy utilization efficiency can be improved by the allocation and management of the refrigeration needs of the air conditioner and the refrigerator through the vehicle thermal management system, and the compressor can use energy more efficiently, thereby reducing the overall energy consumption of the vehicle. In addition, the fourth expansion valve can adjust the outlet pressure of the air conditioning branch so that the outlet pressure of the air conditioning evaporator is not equal to the outlet pressure of the first refrigerator evaporator, while meeting the different refrigeration needs of the refrigerator and the air conditioner, further improving the orderly control of the vehicle thermal management system, and then ensuring that the heat is reasonably distributed and utilized, and improving the thermal management efficiency of the system.

[0008] In some embodiments, the vehicle thermal management system also includes a second refrigerator branch, which is connected between the outlet of the condenser and the inlet of the compressor. The second refrigerator branch includes a second refrigerator evaporator and a third expansion valve. Along the extension direction of the second refrigerator branch, the third expansion valve is located between the outlet of the condenser and the inlet of the second refrigerator evaporator.

[0009] In some embodiments, the air conditioning branch further includes a converging flow path, which is connected between the outlet of the air conditioning branch and the inlet of the compressor, and the converging flow path is connected between the outlet of the first refrigerator branch and the inlet of the compressor.

[0010] In some embodiments, the fourth expansion valve is used to adjust the outlet pressure of the air conditioning branch so that the outlet pressure of the air conditioning evaporator is not equal to the outlet pressure of the first refrigerator evaporator.

[0011] In some embodiments, the outlet pressure of the air conditioner evaporator is higher than the outlet pressure of the first refrigerator evaporator.

[0012] In some embodiments, the opening degree of the fourth expansion valve is determined according to the temperature of the air outlet of the air conditioner and the outlet pressure of the first refrigerator evaporator.

[0013] In some embodiments, the vehicle thermal management system further includes a first temperature sensor for detecting the temperature of the air outlet of the air conditioner, and a pressure sensor for detecting the outlet pressure of the first refrigerator evaporator.

[0014] In some embodiments, the vehicle thermal management system further includes a fan, and the first refrigerator evaporator is located on an air outlet side or an air inlet side of the fan.

[0015] In some embodiments, the operating state of the fan is determined based on the temperature inside the refrigerator and the driving speed of the vehicle, or based on the temperature inside the refrigerator and the air conditioning gear.

[0016] In some embodiments, the vehicle thermal management system further includes a second temperature sensor for detecting the temperature inside the refrigerator compartment.

[0017] In a second aspect, an embodiment of the present application provides a control method for controlling the above-mentioned vehicle thermal management system, the method comprising:

[0018] The opening degree of the fourth expansion valve is controlled so that the outlet pressure of the air conditioner evaporator is not equal to the outlet pressure of the first refrigerator evaporator.

[0019] In some embodiments, controlling the opening degree of the fourth expansion valve includes:

[0020] The opening degree of the fourth expansion valve is determined according to the temperature of the air outlet of the air conditioner and the outlet pressure of the evaporator of the first refrigerator.

[0021] In some embodiments, before controlling the opening degree of the fourth expansion valve, the method further includes:

[0022] Confirm that the vehicle thermal management system meets the first preset condition. The first preset condition includes: the air outlet temperature of the air conditioner is less than or equal to the first preset threshold. Alternatively, the first preset condition includes that the outlet pressure of the first refrigerator evaporator is greater than the second preset threshold.

[0023] In some embodiments, before controlling the opening degree of the fourth expansion valve, the method further includes:

[0024] Confirm that the vehicle thermal management system meets the second preset condition. The second preset condition includes: the air outlet temperature of the air conditioner is greater than the first preset threshold. Alternatively, the second preset condition includes that the outlet pressure of the first refrigerator evaporator is less than or equal to the second preset threshold.

[0025] In a third aspect, an embodiment of the present application provides a control method for controlling the above-mentioned vehicle thermal management system, the method comprising:

[0026] The operating state of the refrigerator fan is controlled so that the operating noise of the refrigerator is less than or equal to the operating noise of the air conditioner and / or the running noise of the vehicle.

[0027] In some embodiments, controlling the operating state of a refrigerator fan includes:

[0028] The operating state of the refrigerator fan is determined according to the temperature inside the refrigerator compartment, the vehicle speed and / or the air conditioning gear position.

[0029] In some embodiments, before controlling the operating state of the refrigerator fan, the method includes:

[0030] Confirm that the vehicle thermal management system meets a third preset condition, wherein the third preset condition includes: the temperature inside the refrigerator is greater than a third preset threshold.

[0031] In some embodiments, before controlling the operating state of the refrigerator fan, the method includes:

[0032] Confirm that the vehicle thermal management system meets a fourth preset condition. The fourth preset condition includes: the temperature inside the refrigerator is less than or equal to a third preset threshold.

[0033] In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, wherein the processor is connected to the memory, and the memory stores computer instructions. When the computer instructions are executed on the electronic device, the electronic device executes the above method.

[0034] In a fifth aspect, an embodiment of the present application provides a vehicle, comprising the above-mentioned vehicle thermal management system and / or the above-mentioned electronic device.

[0035] The technical effects brought about by any implementation method of the second to fifth aspects mentioned above can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the refrigeration principle of a car refrigerator in the related art;

[0037] Figure 2 A schematic diagram of the structure of a vehicle thermal management system provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the flow of refrigerant for air conditioning refrigeration in a vehicle thermal management system provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the flow of refrigerant for refrigerator refrigeration in a vehicle thermal management system provided in an embodiment of the present application;

[0040] Figure 5 For this application Figure 2 Schematic diagram of the structure of the coaxial tube;

[0041] Figure 6 A control logic diagram of a vehicle thermal management system controlling a fourth expansion valve provided by an embodiment of the present application;

[0042] Figure 7 A control logic diagram of a vehicle thermal management system for controlling fan operation provided in an embodiment of the present application.

[0043] Reference numerals:

[0044] 1. Independent compressor; 2. Radiator; 3. Expansion valve; 4. Evaporator;

[0045] 100. Vehicle thermal management system; 10. Compressor; 20. Condenser; 30. Air conditioning branch; 31. Air conditioning evaporator; 32. First expansion valve; 33. Fourth expansion valve; 40. First refrigerator branch; 41. First refrigerator evaporator; 42. Second expansion valve; 43. Fan; 50. Second refrigerator branch; 51. Second refrigerator evaporator; 52. Third expansion valve; 60. Coaxial tube; 61. Central channel; 62. Outer tube channel; 70. Liquid storage tank; 80. Gas-liquid separator; 90. Converging flow path. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0050] It should be noted that, in practical applications, due to the limitations of equipment accuracy or installation errors, absolute parallel or vertical effects are difficult to achieve. The description of "vertical", "parallel" or "same direction" in this application is not an absolute limiting condition, but means that a vertical or parallel structural setting can be achieved within a preset error range, and the corresponding preset effect can be achieved. In this way, the technical effect of the defined feature can be maximized, and the corresponding technical solution is easy to implement, with high feasibility. For example, "vertical" includes absolute vertical and approximate vertical, wherein the acceptable deviation range of approximate vertical can also be, for example, a deviation within 5°. "Parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel can also be, for example, a deviation within 5°. "Same direction" includes absolute same direction and approximate same direction, wherein the acceptable deviation range of approximate same direction can also be, for example, a deviation within 5°.

[0051] In the embodiments of the present application, the words "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0052] The vehicle thermal management system is one of the important components of the vehicle. It can perform thermal management on the air-conditioning temperature in the cabin, the operating temperature of the battery system, and equipment such as the onboard refrigerator in the vehicle, thereby improving the riding experience of the driver and passengers.

[0053] A car refrigerator is a refrigerator that can be carried in a vehicle. It is mainly used to keep food and drinks fresh and cool in the vehicle. It can provide refrigeration and heat preservation functions, is portable and convenient, and can help preserve food during long-distance travel, camping or outdoor activities.

[0054] In the related art, see Figure 1 , Figure 1 The figure is a schematic diagram of the refrigeration principle of a car refrigerator in the related art. The independent compressor car refrigerator adopts the traditional refrigerator technology and performs mechanical compression cycle refrigeration through the independent compressor 1. The independent compressor 1 works on the refrigerant and compresses it into high-temperature and high-pressure gas, which then dissipates heat through the radiator 2 and throttles and reduces pressure through the expansion valve 3, and absorbs heat at the evaporator 4 to achieve the refrigeration function.

[0055] However, the vehicle only considers the cooling needs of a single onboard refrigerator, and does not consider the thermal management needs of air conditioners, resulting in a high overall energy consumption. At the same time, the energy distribution method and the scenarios considered for the entire vehicle are not comprehensive enough, and the thermal management efficiency of the vehicle is not high.

[0056] Based on this, the present application provides a vehicle, including a vehicle thermal management system 100. It should be noted that the vehicle thermal management system 100 can be used for cooling the vehicle or heating the vehicle. The present application takes the vehicle thermal management system 100 for cooling the vehicle as an example for explanation.

[0057] For details, see Figure 2 , Figure 2 The vehicle thermal management system 100 is a schematic diagram of the structure of the vehicle thermal management system provided in the embodiment of the present application. The vehicle thermal management system 100 includes: a compressor 10 and a condenser 20, an air conditioning branch 30 and a first refrigerator branch 40. The outlet of the compressor 10 is connected to the inlet of the condenser 20.

[0058] The air conditioning branch 30 is connected between the outlet of the condenser 20 and the inlet of the compressor 10, and includes an air conditioning evaporator 31, a first expansion valve 32, and a fourth expansion valve 33. Along the extension direction of the air conditioning branch 30, the first expansion valve 32 is located between the outlet of the condenser 20 and the inlet of the air conditioning evaporator 31, and the fourth expansion valve 33 is located between the outlet of the air conditioning evaporator 31 and the inlet of the compressor 10.

[0059] The first refrigerator branch 40 is connected between the outlet of the condenser 20 and the inlet of the compressor 10, and includes a first refrigerator evaporator 41 and a second expansion valve 42. Along the extension direction of the first refrigerator branch, the second expansion valve is located between the outlet of the condenser and the inlet of the first refrigerator evaporator.

[0060] It can be understood that during the refrigeration cycle, the outlet of the compressor 10 is connected to the inlet of the condenser 20. After the compressor 10 starts working, the refrigerant is compressed into a high-temperature and high-pressure gas. The high-temperature and high-pressure gas releases heat through the condenser 20 and becomes a high-pressure supercooled liquid refrigerant.

[0061] See also Figure 3 , Figure 3 The vehicle thermal management system provided in the embodiment of the present application is a refrigerant flow diagram for air conditioning refrigeration. During air conditioning refrigeration, the high-pressure supercooled liquid refrigerant passes through the first expansion valve 32, and is throttled and reduced in pressure to become a low-pressure supercooled liquid refrigerant. The low-pressure supercooled liquid refrigerant absorbs heat and evaporates in the air-conditioning evaporator 31, and returns to the compressor 10 to enter the next cycle.

[0062] See also Figure 4 , Figure 4 The vehicle thermal management system provided in the embodiment of the present application is a refrigerant flow diagram for refrigerator refrigeration. When the refrigerator is refrigerating, the high-pressure supercooled liquid refrigerant passes through the second expansion valve 42, and is throttled and reduced in pressure to become a low-pressure supercooled liquid refrigerant. The low-pressure supercooled liquid refrigerant absorbs heat and evaporates in the first refrigerator evaporator 41, and returns to the compressor 10 to enter the next cycle.

[0063] In this way, the air conditioning branch 30 and the refrigerator branch 40 in the vehicle thermal management system 100 are connected in parallel, and share a compressor 10 and a condenser 20. In this way, the vehicle thermal management system 100 can improve the energy utilization efficiency by allocating and managing the cooling needs of the air conditioner and the refrigerator, and the compressor 10 can use energy more efficiently, thereby reducing the overall energy consumption of the vehicle.

[0064] In addition, the fourth expansion valve 33 can adjust the outlet pressure of the air-conditioning branch 30 so that the outlet pressure of the air-conditioning evaporator 31 is not equal to the outlet pressure of the first refrigerator evaporator 41, while meeting the different refrigeration requirements of the refrigerator and the air conditioner, further improving the orderly control of the vehicle thermal management system 100, and thereby ensuring that heat is reasonably distributed and utilized, thereby improving the thermal management efficiency of the system.

[0065] It is understandable that if the fourth expansion valve 33 is not provided, in order to ensure the stable operation of the vehicle thermal management system 100, the outlet pressures of the air conditioning branch 30 and the first refrigerator branch 40 need to be equal, that is, the outlet pressures of the air conditioning evaporator 31 and the first refrigerator evaporator 41 need to be equal. After the fourth expansion valve 33 is provided, the outlet pressure of the air conditioning branch 30 can be adjusted, so the outlet pressure of the air conditioning evaporator 31 and the outlet pressure of the first refrigerator evaporator 41 may not be equal.

[0066] In some embodiments, the vehicle thermal management system 100 further includes a second refrigerator branch 50, which is connected between the outlet of the condenser 20 and the inlet of the compressor 10, and includes a second refrigerator evaporator 51 and a third expansion valve 52. Along the extension direction of the second refrigerator branch 50, the third expansion valve 52 is located between the outlet of the condenser 20 and the inlet of the second refrigerator evaporator 51.

[0067] It should be noted that the first refrigerator evaporator 41 and the second refrigerator evaporator 51 are both evaporators of vehicle refrigerators, and the two vehicle refrigerators are arranged in the driver's cabin of the vehicle.

[0068] In this way, two refrigerators can be arranged in the vehicle, and different refrigerators can be adjusted respectively through the first refrigerator branch 40 and the second refrigerator branch 50.

[0069] For example, one car refrigerator is set on the front armrest of the cab for the driver and the co-driver, and another car refrigerator can be set on the rear armrest of the cab for the rear passengers to use, so as to ensure that each member in the cab has a more consistent user experience.

[0070] In some embodiments, the vehicle thermal management system 100 also includes a converging flow path 90 , which is connected between the outlet of the air conditioning branch 30 and the inlet of the compressor 10 , and the converging flow path 90 is connected between the outlet of the first refrigerator branch 40 and the inlet of the compressor 10 .

[0071] In this way, by setting the confluence flow path 90, the outlet of the air-conditioning branch 30 and the outlet of the first refrigerator branch 40 can be connected and connected to the inlet of the compressor 10 together, which can simplify the structure of the vehicle thermal management system 100.

[0072] In some other embodiments, the outlet of the air-conditioning branch 30 and the outlet of the first refrigerator branch 40 in the vehicle thermal management system 100 may be respectively connected to the inlet of the compressor 10 .

[0073] In some embodiments, the fourth expansion valve 33 is used to adjust the outlet pressure of the air conditioning branch 30 so that the outlet pressure of the air conditioning evaporator 31 is not equal to the outlet pressure of the first refrigerator evaporator 41 .

[0074] In this way, by setting the fourth expansion valve 33 at the outlet of the air conditioner evaporator 31, the outlet pressure of the air conditioner branch 30 can be adjusted. In other words, the fourth expansion valve 33 can adjust the outlet pressure of the air conditioner branch 30 so that the outlet pressure of the air conditioner evaporator 31 is not equal to the outlet pressure of the first refrigerator evaporator 41, so as to meet the different refrigeration requirements of the refrigerator and the air conditioner. At the same time, the outlet pressure of the air conditioner branch 30 can be adjusted to be consistent with the outlet pressure of the first refrigerator branch 40 to ensure the stable operation of the vehicle thermal management system 100.

[0075] In some other embodiments, the fourth expansion valve 33 can be used to adjust the outlet pressure of the air-conditioning branch 30 so that the outlet pressure of the air-conditioning evaporator 31 is not equal to the outlet pressure of the first refrigerator evaporator 41 and the outlet pressure of the second refrigerator evaporator 51.

[0076] In some embodiments, the outlet pressure of the air conditioner evaporator 31 is higher than the outlet pressure of the first refrigerator evaporator 41 .

[0077] In this way, the cooling temperature of the air conditioner is higher than that of the refrigerator. The refrigerator can be adjusted to a lower temperature according to actual usage to refrigerate or freeze the items in the box.

[0078] In some other embodiments, the outlet pressure of the air conditioner evaporator 31 is higher than the outlet pressure of the first refrigerator evaporator 41 , and the outlet pressure of the air conditioner evaporator 31 is also higher than the outlet pressure of the second refrigerator evaporator 51 .

[0079] In some embodiments, the opening degree of the fourth expansion valve 33 is determined according to the temperature of the air outlet of the air conditioner and the outlet pressure of the first refrigerator evaporator 41 .

[0080] In this way, the opening of the fourth expansion valve 33 can be controlled according to the temperature of the air outlet of the air conditioner and the outlet pressure of the first refrigerator evaporator 41, which can improve the intelligence level of the vehicle thermal management system 100. In addition, the refrigeration effect of the air conditioner and the refrigerator can be guaranteed by reasonably allocating the refrigeration demand of the air conditioner and the refrigerator.

[0081] In some embodiments, the vehicle thermal management system 100 further includes a first temperature sensor for detecting the temperature of an air outlet of an air conditioner, and a pressure sensor for detecting the outlet pressure of an evaporator of a first refrigerator.

[0082] In this way, the first temperature sensor is used to detect the temperature of the air outlet of the air conditioner. The pressure sensor is used to detect the outlet pressure of the first refrigerator evaporator 41. The opening of the fourth expansion valve 33 can be controlled according to the detection results of the first temperature sensor and the pressure sensor.

[0083] In some embodiments, the vehicle thermal management system 100 further includes a fan 43 , and the first refrigerator evaporator 41 is located at an air outlet side or an air inlet side of the fan.

[0084] In this way, placing the first refrigerator evaporator 41 on the air outlet side or air inlet side of the fan 43 can ensure that the air can be fully cooled when passing through the first refrigerator evaporator 41, thereby improving the heat dissipation efficiency. In addition, the reasonable arrangement of the positions of the first refrigerator evaporator 41 and the fan 43 can reduce energy loss, improve the energy efficiency of the thermal management system, and reduce energy consumption.

[0085] It should be noted that whether the first refrigerator evaporator 41 is specifically located on the air inlet side or the air outlet side of the fan 43 is determined according to the type of the fan.

[0086] For example, the fan 43 may be an axial flow fan, and the first refrigerator evaporator 41 is located at the air outlet side of the fan 43. For another example, the fan 43 may be a centrifugal fan, and the first refrigerator evaporator 41 is located at the air inlet side of the fan 43.

[0087] In some other embodiments, there may be multiple fans 43 , and the second refrigerator evaporator 51 may also be located on the air outlet side or the air inlet side of the fan 43 .

[0088] In this way, placing the second refrigerator evaporator 51 on the air outlet side or air inlet side of the fan can ensure that the air can be fully cooled when passing through the second refrigerator evaporator 51, thereby improving the heat dissipation efficiency, improving the energy efficiency of the thermal management system, and reducing energy consumption.

[0089] In some embodiments, the operating state of the fan is determined based on the temperature inside the refrigerator and the driving speed of the vehicle.

[0090] It is understandable that vehicle driving will generate noise, and the noise generated during vehicle driving is related to the vehicle driving speed.

[0091] In this way, the operating state of the fan can be controlled according to the vehicle's driving speed. This arrangement is conducive to making the noise generated by the fan smaller than the noise generated by the vehicle, thereby reducing the overall noise of the vehicle and improving the user's riding experience.

[0092] In some other embodiments, the operating state of the fan is determined according to the temperature inside the refrigerator and the air conditioner level.

[0093] It is understandable that the operation of the air conditioner will generate noise, and the noise generated during the operation of the air conditioner is related to the operating gear of the air conditioner.

[0094] In this way, the operating state of the fan can be controlled according to the air conditioning gear. This setting is conducive to making the noise generated by the fan smaller than the noise generated by the operation of the air conditioner, thereby reducing the overall noise of the vehicle and improving the user's riding experience.

[0095] In some embodiments, the vehicle thermal management system further includes a second temperature sensor for detecting the temperature inside the refrigerator compartment.

[0096] In this way, the second temperature sensor is used to detect the temperature inside the refrigerator, and the operation of the fan can be controlled according to the detection result of the second temperature sensor.

[0097] In some embodiments, see Figure 2 Combined with Figure 5 , Figure 5 For this application Figure 2 , the vehicle thermal management system 100 further includes a coaxial tube 60. The coaxial tube 60 includes a central channel 61 and an outer tube channel 62 surrounding the central channel 61. The inlet of the central channel 61 is connected to the outlet of the condenser 20, and the outlet of the central channel 61 is connected to the inlet of the air conditioner evaporator 31, the first refrigerator evaporator 41, and the second refrigerator evaporator 51. The inlet of the outer tube channel 62 is connected to the outlet of the air conditioner evaporator 31, the refrigerator evaporator 41, and the second refrigerator evaporator 51, and the outlet of the outer tube channel 62 is connected to the inlet of the compressor 10.

[0098] Thus, by providing the coaxial tube 60, the pipeline layout of the vehicle thermal management system 100 can be made simpler and more compact, saving space in the vehicle. In addition, through the design of the central channel 61 and the outer tube channel 62, the refrigerant can exchange heat with the central channel 61 through the outer tube channel 62 before returning to the compressor 10, thereby reducing the refrigerant temperature at the inlet of the compressor 10, thereby improving the working efficiency of the compressor 10.

[0099] In some embodiments, the vehicle thermal management system 100 further includes a liquid storage tank 70 . The inlet of the liquid storage tank 70 is communicated with the outlet of the condenser 20 , and the outlet of the liquid storage tank 70 is communicated with the inlet of the central channel 61 .

[0100] Since the vehicle thermal management system 100 includes the air conditioning branch 30, the refrigerator branch 40 and the battery branch, the demand for refrigerant is different in different cooling modes. By setting up the liquid storage tank 70, the excess refrigerant in the vehicle thermal management system 100 can be stored to adapt to different cooling modes.

[0101] In some embodiments, the vehicle thermal management system 100 further includes a gas-liquid separator 80 , the inlet of the gas-liquid separator 80 is communicated with the outlet of the outer tube channel 62 , and the outlet of the gas-liquid separator 80 is communicated with the inlet of the compressor 10 .

[0102] In this way, the refrigerant passes through the gas-liquid separator 80 before entering the inlet of the compressor 10. The gas-liquid separator 80 can effectively separate the mixed gaseous and liquid refrigerants, ensuring that the refrigerant entering the compressor 10 is in a gaseous state, avoiding damage to the compressor 10 and extending the service life of the compressor 10.

[0103] See also Figure 6 , Figure 6 A control logic diagram of a vehicle thermal management system controlling a fourth expansion valve is provided in an embodiment of the present application, that is, the opening of the fourth expansion valve is reduced or maintained according to whether the vehicle thermal management system satisfies a first preset condition or a second preset condition.

[0104] Specifically, the embodiment of the present application further provides a control method for controlling the above-mentioned vehicle thermal management system 100, including:

[0105] The opening degree of the fourth expansion valve is controlled so that the outlet pressure of the air conditioner evaporator is not equal to the outlet pressure of the first refrigerator evaporator.

[0106] In this way, the outlet pressure of the air-conditioning evaporator 31 can be made unequal to the outlet pressure of the first refrigerator evaporator 41 by adjusting the fourth expansion valve 33, thereby meeting the different refrigeration requirements of the refrigerator and the air conditioner.

[0107] It is understandable that the refrigeration temperature of the refrigerator is lower than the refrigeration temperature of the air conditioner, that is, the outlet pressure of the air conditioner evaporator 31 is higher than the outlet pressure of the first refrigerator evaporator 41.

[0108] In some embodiments, controlling the opening degree of the fourth expansion valve includes:

[0109] The opening degree of the fourth expansion valve is determined according to the temperature of the air outlet of the air conditioner and the outlet pressure of the evaporator of the first refrigerator.

[0110] In this way, the opening of the fourth expansion valve 33 can be controlled according to the temperature of the air outlet of the air conditioner and the outlet pressure of the first refrigerator evaporator 41, which can improve the intelligence level of the vehicle thermal management system 100. In addition, the refrigeration effect of the air conditioner and the refrigerator can be guaranteed by reasonably allocating the refrigeration demand of the air conditioner and the refrigerator.

[0111] It is understandable that the thermal management requirements of the vehicle cabin take precedence over the thermal management requirements of the refrigerator. The thermal management requirements of the vehicle cabin and the refrigerator can be obtained by the air outlet temperature of the air conditioner and the outlet pressure of the first refrigerator evaporator, respectively. The temperature of the air outlet of the air conditioner can be obtained by the first temperature sensor of the air outlet of the air conditioner to obtain the air outlet temperature of the air conditioner, and the outlet pressure of the first refrigerator evaporator can be detected by the pressure sensor.

[0112] In some embodiments, before controlling the opening degree of the fourth expansion valve, the method further includes:

[0113] Confirm that the vehicle thermal management system meets a first preset condition, wherein the first preset condition includes: an air outlet temperature of the air conditioner is less than or equal to a first preset threshold.

[0114] In this way, when the air outlet temperature of the air conditioner is less than or equal to the first preset threshold value, that is, the air outlet temperature of the air conditioner has reached the preset temperature and has met the operation requirements of the air conditioner. At this time, the second expansion valve can be controlled to reduce the outlet pressure of the first refrigerator evaporator to meet the operation requirements of the refrigerator, and at the same time, the opening of the fourth expansion valve can be controlled to adjust the outlet pressure of the air conditioner branch. In this way, the air conditioner evaporator and the first refrigerator evaporator have different outlet pressures, while the air conditioner branch and the first refrigerator branch have the same outlet pressure, which can ensure the stable operation of the compressor, and then ensure the stable operation of the vehicle thermal management system.

[0115] In some other embodiments, before controlling the opening degree of the fourth expansion valve, the method further includes:

[0116] Confirm that the vehicle thermal management system meets a first preset condition, wherein the first preset condition includes that an outlet pressure of the first refrigerator evaporator is greater than a second preset threshold.

[0117] In this way, when the outlet pressure of the first refrigerator evaporator is greater than the second preset threshold value, that is, the refrigerator has not yet reached the outlet pressure required for operation, the second expansion valve can be controlled to reduce the outlet pressure of the first refrigerator evaporator to meet the operation requirements of the refrigerator, and at the same time, the opening of the fourth expansion valve is controlled to adjust the outlet pressure of the air conditioning branch. In this way, the air conditioning evaporator and the first refrigerator evaporator have different outlet pressures, and the outlet pressures of the air conditioning branch and the first refrigerator branch are equal, which can ensure the stable operation of the compressor, and then ensure the stable operation of the vehicle thermal management system.

[0118] In some embodiments, before controlling the opening degree of the fourth expansion valve, the method further includes:

[0119] Confirm that the vehicle thermal management system meets a second preset condition, wherein the second preset condition includes: the air outlet temperature of the air conditioner is greater than a first preset threshold.

[0120] In this way, when the air outlet temperature of the air conditioner is greater than the first preset threshold, that is, the air outlet temperature of the air conditioner has not reached the preset temperature and has not met the operation demand of the air conditioner, the opening of the fourth expansion valve is maintained to meet the operation demand of the air conditioner.

[0121] In some other embodiments, before controlling the opening degree of the fourth expansion valve, the method further includes:

[0122] Confirm that the vehicle thermal management system meets a second preset condition, wherein the second preset condition includes that the outlet pressure of the first refrigerator evaporator is less than or equal to a second preset threshold.

[0123] In this way, when the evaporation pressure of the refrigerant at the outlet of the refrigerator is less than or equal to the second preset threshold value, that is, the refrigerator reaches the outlet pressure required for operation, the opening of the fourth expansion valve is kept unchanged, so that the air conditioner and the refrigerator continue to operate. At this time, the air conditioner branch and the first refrigerator branch have the same outlet pressure, while the air conditioner evaporator and the first refrigerator evaporator have different outlet pressures.

[0124] See also Figure 7 , Figure 7 A control logic diagram of a vehicle thermal management system for controlling fan operation provided in an embodiment of the present application, that is, the working state of the fan is controlled according to the vehicle thermal management system satisfying the third preset condition or the vehicle thermal management system satisfying the fourth preset condition.

[0125] Specifically, a control method provided in an embodiment of the present application is used to control the above-mentioned vehicle thermal management system 100, including:

[0126] Control the operating state of the refrigerator fan so that the operating noise of the refrigerator is less than or equal to the operating noise of the air conditioner.

[0127] In this way, the air conditioner will generate noise when in operation, and the operating noise of the refrigerator will be less than or equal to the operating noise of the air conditioner, which can improve the user's riding experience.

[0128] In some embodiments, controlling the operating state of a refrigerator fan includes:

[0129] The operating status of the refrigerator fan is determined by the temperature inside the refrigerator and the air conditioning gear.

[0130] It is understandable that the noise generated during the operation of the air conditioner is related to the operating gear of the air conditioner.

[0131] In this way, the operating state of the fan can be controlled according to the operating gear of the air conditioner. This setting is conducive to making the noise generated by the fan smaller than the noise generated by the operation of the air conditioner, thereby reducing the overall noise of the vehicle and improving the user's riding experience.

[0132] In some other embodiments, the control method includes:

[0133] The operating state of the refrigerator fan is controlled so that the operating noise of the refrigerator is less than or equal to the driving noise of the vehicle.

[0134] In this way, the vehicle will generate noise when running, and the operating noise of the refrigerator will be less than or equal to the vehicle running noise, which can improve the user's riding experience.

[0135] In some other embodiments, controlling the operating state of the refrigerator fan includes:

[0136] The operating status of the refrigerator fan is determined by the temperature inside the refrigerator and the vehicle's driving speed.

[0137] It is understandable that the noise generated during vehicle driving is related to the vehicle driving speed.

[0138] In this way, the operating state of the fan can be controlled according to the vehicle's driving speed. This arrangement is conducive to making the noise generated by the fan smaller than the noise generated by the vehicle, thereby reducing the overall noise of the vehicle and improving the user's riding experience.

[0139] In some embodiments, before controlling the operating state of the refrigerator fan, the method includes:

[0140] Confirm that the vehicle thermal management system meets a third preset condition, wherein the third preset condition includes: the temperature inside the refrigerator is greater than a third preset threshold.

[0141] In this way, when the second temperature value is greater than the third preset threshold value, the temperature of the refrigerator has not reached the preset temperature and needs to be cooled down continuously. At this time, the fan needs to be controlled to continue running.

[0142] In some embodiments, controlling the operating state of the fan according to the air conditioner gear position includes:

[0143] The air conditioning gear is greater than or equal to the first preset gear, and the fan is controlled to operate at a first duty cycle.

[0144] The air conditioning gear is greater than or equal to the second preset gear and less than the first preset gear, and the fan is controlled to operate at a second duty cycle.

[0145] The air conditioning gear is greater than or equal to the third preset gear and less than the second preset gear, and the fan is controlled to operate at a third duty cycle.

[0146] The first preset gear is greater than or equal to the second preset gear, the second preset gear is greater than the third preset gear, the first duty cycle is greater than the second duty cycle, and the second duty cycle is greater than the third duty cycle.

[0147] In this way, the fan duty cycle can be adjusted according to the range of the air conditioning gear of the air conditioner, so that the noise generated by the fan is smaller than the noise of the air conditioner.

[0148] Exemplarily, the first preset gear may be gear 1, the second preset gear may be gear 2, and the third preset gear may be gear 3. The first duty cycle of the fan may be 100%, the second duty cycle may be 80%, and the third duty cycle may be 60%.

[0149] In some embodiments, controlling the operating state of the fan according to the vehicle speed includes:

[0150] When the vehicle speed is greater than or equal to a first preset speed value, the fan is controlled to operate at a first duty cycle.

[0151] When the vehicle speed is greater than or equal to the second preset speed value and less than the first preset speed value, the fan is controlled to operate at a second duty cycle.

[0152] When the vehicle speed is greater than or equal to the third preset speed value and less than the second preset speed value, the fan is controlled to operate at a third duty cycle.

[0153] The first preset speed value is greater than or equal to the second preset speed value, the second preset speed value is greater than the third preset speed value, the first duty cycle is greater than the second duty cycle, and the second duty cycle is greater than the third duty cycle.

[0154] In this way, the fan duty cycle can be adjusted according to the range of vehicle speeds, so that the noise generated by the fan is smaller than the noise generated by the vehicle.

[0155] It should be noted that the present application does not limit the first preset speed value, the second preset speed value and the third preset speed value, the first duty cycle, the second duty cycle and the third duty cycle, and they can be set specifically according to actual needs.

[0156] For example, the first preset speed value may be 100 km / h, the second preset speed value may be 80 km / h, and the third preset speed value may be 60 km / h. The first duty cycle of the fan may be 100%, the second duty cycle may be 80%, and the third duty cycle may be 60%.

[0157] It is understood that if the vehicle speed and the air conditioning gear are not in the same range, the highest duty cycle that the fan can operate shall prevail. For example, if the vehicle is running at a speed of 100 km / h and the fan gear is in the third preset gear, the fan operates at the first duty cycle of 100%.

[0158] In some embodiments, before controlling the operating state of the refrigerator fan, the method includes:

[0159] Confirm that the vehicle thermal management system meets a fourth preset condition. The fourth preset condition includes: the temperature inside the refrigerator is less than or equal to a third preset threshold.

[0160] In this way, when the second temperature value is less than or equal to the third preset threshold value, the temperature of the refrigerator has reached the preset temperature, and the fan can stop working at this time.

[0161] An embodiment of the present application provides an electronic device, including a processor and a memory, wherein the processor is connected to the memory, and the memory stores computer instructions. When the computer instructions are executed on the electronic device, the electronic device executes the above method.

[0162] In this way, by storing the device control method in the form of computer instructions in the memory, automatic control can be achieved when the device is running, reducing human intervention and improving the stability and efficiency of the system operation.

[0163] Optionally, the memory may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0164] In some other embodiments, the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a device, the device executes any of the methods described above.

[0165] In this way, the computer program in the computer program product can be customized according to the specific needs and operating conditions of the device, realizing a personalized control method and improving the adaptability and flexibility of the device control.

[0166] In addition, computer program products can be executed on different devices or systems to achieve cross-platform applicability, provide a unified control method for different types of devices, and improve system integration and interoperability.

[0167] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the present application for which protection is claimed, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprise" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0168] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0169] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vehicle thermal management system, characterized in that: include: A compressor (10) and a condenser (20), wherein the outlet of the compressor (10) is in communication with the inlet of the condenser (20); an air conditioning branch (30), the air conditioning branch (30) being connected between the outlet of the condenser (20) and the inlet of the compressor (10), the air conditioning branch (30) comprising an air conditioning evaporator (31), a first expansion valve (32) and a fourth expansion valve (33); along the extending direction of the air conditioning branch (30), the first expansion valve (32) is located between the outlet of the condenser (20) and the inlet of the air conditioning evaporator (31), and the fourth expansion valve (33) is located between the outlet of the air conditioning evaporator (31) and the inlet of the compressor (10); A first refrigerator branch (40), the first refrigerator branch (40) is connected between the outlet of the condenser (20) and the inlet of the compressor (10), the first refrigerator branch (40) includes a first refrigerator evaporator (41) and a second expansion valve (42); along the extension direction of the first refrigerator branch (40), the second expansion valve (42) is located between the outlet of the condenser (20) and the inlet of the first refrigerator evaporator (41).

2. The vehicle thermal management system according to claim 1, characterized in that: Also includes: A second refrigerator branch (50), the second refrigerator branch (50) is connected between the outlet of the condenser (20) and the inlet of the compressor (10), the second refrigerator branch (50) includes a second refrigerator evaporator (51) and a third expansion valve (52); along the extension direction of the second refrigerator branch (50), the third expansion valve (52) is located between the outlet of the condenser (20) and the inlet of the second refrigerator evaporator (51).

3. The vehicle thermal management system according to claim 1, characterized in that: Also includes: A converging flow path (90), wherein the converging flow path (90) is connected between the outlet of the air conditioning branch (30) and the inlet of the compressor (10), and the converging flow path (90) is connected between the outlet of the first refrigerator branch (40) and the inlet of the compressor (10).

4. The vehicle thermal management system according to claim 1, characterized in that: The fourth expansion valve (33) is used to adjust the outlet pressure of the air conditioning branch (30) so that the outlet pressure of the air conditioning evaporator (31) is not equal to the outlet pressure of the first refrigerator evaporator (41).

5. The vehicle thermal management system according to claim 4, characterized in that: The outlet pressure of the air conditioner evaporator (31) is higher than the outlet pressure of the first refrigerator evaporator (41).

6. The vehicle thermal management system according to claim 4, characterized in that: The opening degree of the fourth expansion valve (33) is determined according to the temperature of the air outlet of the air conditioner and the outlet pressure of the first refrigerator evaporator (41).

7. The vehicle thermal management system according to claim 6, characterized in that: The vehicle thermal management system (100) further comprises a first temperature sensor for detecting the temperature of the air outlet of the air conditioner, and a pressure sensor for detecting the outlet pressure of the first refrigerator evaporator (41).

8. The vehicle thermal management system according to claim 1, characterized in that: Also includes: The fan (43) is provided with the first refrigerator evaporator (41), and the first refrigerator evaporator (41) is located on the air outlet side or the air inlet side of the fan (43).

9. The vehicle thermal management system according to claim 8, characterized in that: The operating state of the fan (43) is determined according to the temperature inside the refrigerator and the driving speed of the vehicle, or according to the temperature inside the refrigerator and the gear position of the air conditioner.

10. The vehicle thermal management system according to claim 9, characterized in that: The vehicle thermal management system (100) further comprises a second temperature sensor for detecting the temperature inside the refrigerator box.

11. A control method for controlling the vehicle thermal management system according to any one of claims 1 to 10, characterized in that: The method comprises: The opening degree of the fourth expansion valve is controlled so that the outlet pressure of the air conditioner evaporator is not equal to the outlet pressure of the first refrigerator evaporator.

12. The control method according to claim 11, characterized in that: The controlling the opening degree of the fourth expansion valve comprises: The opening degree of the fourth expansion valve is determined according to the temperature of the air outlet of the air conditioner and the outlet pressure of the evaporator of the first refrigerator.

13. The control method according to claim 12, characterized in that: Before controlling the opening degree of the fourth expansion valve, the method further includes: confirming that the vehicle thermal management system satisfies a first preset condition; The first preset condition includes: the air outlet temperature of the air conditioner is less than or equal to a first preset threshold; or, the first preset condition includes that the outlet pressure of the first refrigerator evaporator is greater than a second preset threshold.

14. The control method according to claim 12, characterized in that: Before controlling the opening degree of the fourth expansion valve, the method further includes: confirming that the vehicle thermal management system satisfies a second preset condition; The second preset condition includes: the air outlet temperature of the air conditioner is greater than the first preset threshold; or the second preset condition includes the outlet pressure of the first refrigerator evaporator is less than or equal to the second preset threshold.

15. A control method for controlling the vehicle thermal management system according to any one of claims 8 to 10, characterized in that: The method comprises: The operating state of the refrigerator fan is controlled so that the operating noise of the refrigerator is less than or equal to the operating noise of the air conditioner and / or the running noise of the vehicle.

16. The control method according to claim 15, characterized in that: The controlling the operating state of the refrigerator fan includes: The operating state of the refrigerator fan is determined according to the temperature inside the refrigerator box, the vehicle speed and / or the air conditioning gear position.

17. The control method according to claim 16, characterized in that: Before controlling the operating state of the refrigerator fan, the method includes: confirming that the vehicle thermal management system satisfies a third preset condition; Wherein, the third preset condition includes: the temperature inside the refrigerator is greater than a third preset threshold.

18. The control method according to claim 16, characterized in that: Before controlling the operating state of the refrigerator fan, the method includes: confirming that the vehicle thermal management system satisfies a fourth preset condition; Wherein, the fourth preset condition includes: the temperature inside the refrigerator is less than or equal to a third preset threshold.

19. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the processor is connected to the memory, and the memory stores computer instructions. When the computer instructions are executed on the electronic device, the electronic device executes the method according to any one of claims 11 to 18.

20. A vehicle, characterized in that: A vehicle thermal management system comprising any one of claims 1-10 and / or an electronic device comprising claim 19.

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