Method, device and equipment for adjusting opening degree of electronic expansion valve and vehicle

Abstract

The invention provides an electronic expansion valve opening degree adjusting method, device and equipment and a vehicle. Based on the actual surface temperature of an evaporator and the set temperature of an air conditioner panel, the target superheat degree of a battery side, namely the target difference value between the temperature of a refrigerant flowing out of a heat exchanger and the saturation temperature of the refrigerant, is actively and dynamically adjusted; and adjusting the required opening degree of the target electronic expansion valve based on the actual superheat degree of the battery side and the dynamically adjusted target superheat degree of the battery side to obtain the adjusted required opening degree of the target electronic expansion valve, and adjusting the required opening degree of the target electronic expansion valve based on the adjusted actual superheat degree of the battery side and the dynamically adjusted target superheat degree of the battery side. And the opening degree of the target electronic expansion valve is set based on the adjusted required opening degree of the target electronic expansion valve, so that reasonable and effective distribution of refrigerant flow during dual refrigeration can be realized, the cooling rates of the cab side and the battery side can be ensured, the cooling rates of the cab side and the battery side are balanced, and the refrigeration effect of the cab is ensured.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to an electronic expansion valve opening adjustment method, device, equipment and vehicle. Background Art

[0002] In the prior art, when the thermal management air conditioning system is in the dual cooling mode of the cab and the battery, the superheat on the battery side, that is, the superheat at the outlet of the heat exchanger, is adjusted in a passive manner. This adjustment method depends on the opening of the electronic expansion valve, and the opening of the electronic expansion valve is predetermined by a table lookup method, that is, the opening of the electronic expansion valve is usually a fixed value and does not have the function of automatic adjustment. Therefore, this method cannot control the cooling rate of the battery cooling water, which easily leads to a reduction in the refrigerant flow on the cab side and an increase in the refrigerant flow on the battery side, thereby making the cooling effect of the cab worse. Summary of the invention

[0003] Based on the defects and shortcomings of the above-mentioned prior art, the present application proposes an electronic expansion valve opening adjustment method, device, equipment and vehicle, which can adjust the target superheat on the battery side based on the actual surface temperature of the evaporator and the set temperature of the air-conditioning panel, and adjust the opening of the target electronic expansion valve based on the actual superheat on the battery side and the adjusted target superheat on the battery side, so as to realize the reasonable and effective distribution of the refrigerant flow during dual cooling and ensure the cooling effect of the battery and the cab.

[0004] According to a first aspect of an embodiment of the present application, a method for adjusting the opening of an electronic expansion valve is provided, which is applied to a thermal management air conditioning system, wherein the thermal management air conditioning system is in a dual cooling mode of a cab and a battery, and the method comprises:

[0005] Based on the actual surface temperature of the evaporator and the set temperature of the air conditioning panel, the target superheat degree of the battery side is adjusted to obtain the adjusted target superheat degree of the battery side, wherein the target superheat degree of the battery side is the target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the heat exchanger is used for heat exchange to reduce the battery temperature;

[0006] Based on the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side, the required opening degree of the target electronic expansion valve is adjusted to obtain the adjusted required opening degree of the target electronic expansion valve, wherein the actual superheat degree on the battery side is the actual difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the target electronic expansion valve is used to adjust the flow rate of the refrigerant flowing to the heat exchanger;

[0007] The target opening of the electronic expansion valve is set based on the adjusted required opening of the target electronic expansion valve.

[0008] According to a second aspect of an embodiment of the present application, an electronic expansion valve opening adjustment device is provided, which is applied to a thermal management air conditioning system, wherein the thermal management air conditioning system is in a dual cooling mode of a cab and a battery, and the device comprises:

[0009] a first regulating module, configured to regulate a target superheat degree on the battery side based on an actual surface temperature of the evaporator and a set temperature of the air conditioning panel, to obtain an regulated target superheat degree on the battery side, wherein the target superheat degree on the battery side is a target difference between a temperature of a refrigerant flowing out of a heat exchanger and a saturation temperature of the refrigerant, wherein the heat exchanger is used for heat exchange to reduce a battery temperature;

[0010] a second regulating module, configured to regulate the required opening of the target electronic expansion valve based on the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side, so as to obtain the required opening of the adjusted target electronic expansion valve, wherein the actual superheat degree on the battery side is the actual difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the target electronic expansion valve is configured to regulate the flow rate of the refrigerant flowing to the heat exchanger;

[0011] The opening setting module is used to set the opening of the target electronic expansion valve based on the adjusted required opening of the target electronic expansion valve.

[0012] According to a third aspect of an embodiment of the present application, there is provided an electronic device, including a memory and a processor;

[0013] The memory is connected to the processor and is used to store programs;

[0014] The processor is used to implement the electronic expansion valve opening adjustment method as described in the first aspect by running the program in the memory.

[0015] According to a fourth aspect of an embodiment of the present application, a storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the electronic expansion valve opening adjustment method as described in the first aspect is implemented.

[0016] According to a fifth aspect of an embodiment of the present application, a vehicle is provided, wherein the vehicle is provided with the electronic expansion valve opening adjustment device as described in the second aspect, or the electronic device as described in the third aspect.

[0017] In the above-mentioned electronic expansion valve opening adjustment method, device, equipment and vehicle, the target superheat on the battery side, that is, the target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, can be actively and dynamically adjusted based on the actual surface temperature of the evaporator and the set temperature of the air-conditioning panel to obtain the adjusted target superheat on the battery side. Based on the actual superheat on the battery side and the dynamically adjusted target superheat on the battery side, the required opening of the target electronic expansion valve is adjusted to obtain the adjusted required opening of the target electronic expansion valve, and the opening of the target electronic expansion valve is set based on the adjusted required opening of the target electronic expansion valve. This can achieve reasonable and effective distribution of the refrigerant flow during dual cooling, ensure the cooling rate on the cab side and the battery side, and achieve a balance between the cooling rate on the cab side and the battery side, thereby ensuring the cooling effect of the cab. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of a feasible application scenario of a method for adjusting the opening of an electronic expansion valve provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a process of an electronic expansion valve opening adjustment method provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of an electronic expansion valve opening adjustment process provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of an electronic expansion valve opening adjustment device proposed in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of an electronic device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] As described in the background technology, when the thermal management air conditioning system is in the dual cooling mode of the cab and the battery, the superheat on the battery side, that is, the superheat at the outlet of the heat exchanger, is adjusted in a passive manner. This adjustment method depends on the opening of the electronic expansion valve, and the opening of the electronic expansion valve is predetermined by a table lookup method, that is, the opening of the electronic expansion valve is usually a fixed value and does not have the function of automatic adjustment. Therefore, this method cannot control the cooling rate of the battery cooling water, which easily leads to a reduction in the refrigerant flow on the cab side and an increase in the refrigerant flow on the battery side, thereby making the cooling effect of the cab worse.

[0026] On this basis, the inventors discovered through further research that by actively and dynamically adjusting the target superheat on the battery side, that is, the target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, based on the actual surface temperature of the evaporator and the set temperature of the air-conditioning panel, the adjusted target superheat on the battery side is obtained, and based on the actual superheat on the battery side and the dynamically adjusted target superheat on the battery side, the required opening of the target electronic expansion valve is adjusted to obtain the adjusted required opening of the target electronic expansion valve, and the opening of the target electronic expansion valve is set based on the adjusted required opening of the target electronic expansion valve, which can achieve a reasonable and effective distribution of the refrigerant flow during dual cooling, can ensure the cooling rate on the cab side and the battery side, and achieve a balance between the cooling rate on the cab side and the battery side, thereby ensuring the cooling effect of the cab.

[0027] Based on the above concept, an embodiment of the present specification provides an electronic expansion valve opening adjustment method, which will be described exemplarily in conjunction with the accompanying drawings.

[0028] refer to Figure 1 , Figure 1 A schematic diagram of a thermal management air conditioning system, which is a feasible application scenario of the electronic expansion valve opening adjustment method.

[0029] like Figure 1 As shown, the thermal management air conditioning system includes a compressor 110 , a condenser 120 , a first electronic expansion valve 130 and an evaporator 140 .

[0030] When the cab needs to be cooled, the first electronic expansion valve 130 is opened, and the compressor 110 sucks in the low-temperature and low-pressure gaseous refrigerant, i.e., the refrigerant, and compresses it into a high-pressure and high-temperature gaseous refrigerant, which is sent to the condenser 120 along the pipeline. The compressor 110 drives the refrigerant to circulate in the system to provide power for the refrigeration cycle. The condenser 120 dissipates the high-temperature and high-pressure refrigerant vapor discharged from the compressor 110 into the atmosphere through the radiator 450, condensing it into liquid refrigerant. The liquid refrigerant continues to pass through the first electronic expansion valve 130 along the pipeline to the evaporator 140. The evaporator 140 converts the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant to provide a cooling effect for the cab. The gaseous refrigerant continues to return to the compressor 110 along the pipeline, and the cycle is repeated in this way to reduce the temperature of the cab.

[0031] like Figure 1 As shown, the thermal management air conditioning system further includes a second electronic expansion valve 210 , a heat exchanger 220 and a second water pump 230 .

[0032] When the battery needs to be cooled, the second electronic expansion valve 210 is opened, and when the refrigerant flows through the heat exchanger 220, it exchanges heat with the cooling water in the heat exchanger 220. At the same time, the second water pump 230 is turned on to circulate water to reduce the battery temperature.

[0033] like Figure 1 As shown, the thermal management air conditioning system also includes a PTC heater 310 , a heating module 320 , a first water pump 330 and a first water tank 340 .

[0034] The heating module 320 and the evaporator 140 are arranged in the air conditioning box.

[0035] When the cab needs to be heated, the water temperature is adjusted by adjusting the power of the PTC heater 310 to increase the water temperature. At the same time, the first water pump 330 is turned on for water circulation, so that the water in the first water tank 340 flows through the first water pump 330 and the PTC heater 310 to the heating module 320. The heating module 320 uses the cooling circulating water as a heat source and transfers the heat energy to the cab through the air-conditioning system to heat the cab.

[0036] like Figure 1 As shown, the thermal management air conditioning system also includes a second water tank 240 .

[0037] When the battery needs to be heated, the second electronic expansion valve 210 is disconnected. When the refrigerant flows through the heat exchanger 220, it does not exchange heat with the cooling water in the heat exchanger 220. The second water pump 230 is turned on for water circulation, so that the water in the second water tank 240 flows through the second water pump 230 to the battery box assembly 250, and then returns to the second water tank 240. This cycle is repeated to heat the battery evenly.

[0038] like Figure 1 As shown, the thermal management air conditioning system further includes a motor group 410 , a third water tank 420 , a third water pump 430 , a controller 440 , and a radiator 450 arranged in parallel with the third water tank 420 .

[0039] The motor group 410 includes a chassis drive motor, a top motor and a top motor driver, and the controller 440 can be an all-in-one controller.

[0040] As the heat generated by the motor group 410 and the controller 440 increases with the increase in working time, the fan 460 on the radiator 450 inhales air and accelerates its flow, so that the coolant flowing through the radiator 450 is cooled more quickly, thereby reducing the temperature of the third water tank 420. The third water pump 430 is turned on to promote the circulation of cooling water to reduce the temperature of the cooling water in the entire pipeline. This cycle is repeated to achieve heat dissipation for the motor group 410 and the controller 440. At the same time, the fan 460 is used to dissipate heat for the condenser 120.

[0041] It is understandable that the operating modes of the thermal management air-conditioning system include single cab cooling mode, single battery cooling mode, cab and battery dual cooling mode, cab heating and battery cooling mode, cooling and demisting mode, heating and demisting mode, etc.

[0042] Specifically, the flow direction of the refrigerant or cooling water in each pipeline of the thermal management air conditioning system can be as follows: Figure 1 As indicated by the arrows shown.

[0043] The thermal management air conditioning system also includes a cab temperature sensor (i.e., an in-vehicle temperature sensor, Figure 1 Not shown), battery cell temperature sensor ( Figure 1 ), heat exchanger outlet temperature sensor 510, namely T2, evaporator outlet temperature sensor 520, namely T4, evaporator surface temperature sensor 530, namely T3, low pressure PT sensor 540, namely PT, compressor outlet (exhaust) temperature sensor 550, namely T1, condenser outlet pressure sensor 560, namely P H , the battery water inlet temperature sensor 570 , namely T5, and the battery water outlet temperature sensor 580 , namely T6.

[0044] The low-pressure PT sensor 540 can measure the low-pressure of the refrigerant at its location, and there is a corresponding relationship between the low-pressure and the evaporation saturation temperature of the refrigerant.

[0045] See also Figure 2 In an exemplary embodiment, a method for adjusting the opening of an electronic expansion valve is provided, which is applied to Figure 1 In the thermal management air conditioning system shown, the thermal management air conditioning system is in a dual cooling mode for the cab and the battery. Figure 2As shown, the electronic expansion valve opening adjustment method includes steps S201-S203:

[0046] S201: Based on the actual evaporator surface temperature and the air conditioning panel set temperature, the battery side target superheat is adjusted to obtain an adjusted battery side target superheat.

[0047] The battery side superheat is the difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the battery side target superheat is the target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant.

[0048] Specifically, the temperature of the refrigerant flowing out of the heat exchanger, i.e., the temperature of the refrigerant at the heat exchanger outlet, can be obtained by temperature detection by the heat exchanger outlet temperature sensor. The saturation temperature of the refrigerant is the saturation temperature corresponding to the low pressure of the refrigerant obtained by pressure detection by the low pressure PT sensor. The actual temperature of the evaporator surface can be obtained by temperature detection by the evaporator surface temperature sensor.

[0049] In addition, a heat exchanger is used for heat exchange to reduce the battery temperature. For example, the heat exchanger can be a shell and tube heat exchanger or a heat exchanger such as Figure 1 Plate heat exchanger shown.

[0050] The air conditioning panel setting temperature is the indoor temperature that needs to be achieved in the cooling mode. This temperature can be set by the driver or by the thermal management air conditioning system. Generally, different air conditioning panel setting temperatures correspond to different evaporator surface target temperatures. The lower the air conditioning panel setting temperature, the lower the evaporator surface temperature needs to be, that is, the lower the evaporator surface target temperature is, so that the cooling effect of the cab can be better guaranteed.

[0051] It is understandable that when the target superheat of the battery side is adjusted, the adjusted target superheat of the battery side is the adjusted target superheat of the battery side obtained when the target superheat was adjusted last time, or the initial target superheat of the battery side, that is, the unadjusted target superheat of the battery side. In other words, based on the actual surface temperature of the evaporator and the set temperature of the air conditioning panel, the initial target superheat of the battery side or the adjusted target superheat of the battery side obtained by the last target superheat adjustment is adjusted for the current time, and the target superheat of the battery side adjusted for the current time is obtained.

[0052] After the adjusted battery-side target superheat is obtained, the battery-side target superheat may be stored so as to facilitate the next target superheat adjustment based on the battery-side target superheat.

[0053] The target temperature of the evaporator surface changes with the current environment and cooling demand. Therefore, the target superheat of the battery side obtained by adjusting the target superheat is variable. By adjusting the target superheat of the battery side based on the actual evaporator surface temperature and the set temperature of the air-conditioning panel, the adjusted target superheat of the battery side is obtained, thereby realizing dynamic adjustment of the target superheat of the battery side.

[0054] In addition, since the current thermal management air-conditioning system is in a dual cooling mode of the cab and the battery, the temperature and cooling effect on the cab side must also be considered when adjusting the target overheat on the battery side, and the evaporator surface temperature can better reflect the cooling effect of the cab. The target overheat on the battery side is adjusted based on the actual evaporator surface temperature and the air-conditioning panel set temperature. This can better balance the cooling effects on the battery side and the cab side, avoid the cab evaporator surface temperature being too low and triggering protection, and avoid the evaporator surface temperature being too high and causing poor cooling effect, thereby effectively and reasonably ensuring the cab cooling effect and the battery cooling effect.

[0055] S202: Based on the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side, adjusting the required opening degree of the target electronic expansion valve to obtain the adjusted required opening degree of the target electronic expansion valve.

[0056] The actual superheat degree on the battery side is the actual difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant.

[0057] In addition, the target electronic expansion valve is used to adjust the flow rate of the refrigerant flowing to the heat exchanger. Figure 1 The second electronic expansion valve is shown.

[0058] Generally, the larger the opening of the target electronic expansion valve, the larger the flow rate of the refrigerant flowing to the heat exchanger, ie, the flow rate of the refrigerant used for battery cooling, and the smaller the flow rate of the refrigerant flowing to the evaporator, ie, the flow rate of the refrigerant used for cab cooling.

[0059] It is understandable that when adjusting the target electronic expansion valve's required opening, the adjusted target electronic expansion valve's required opening is the target electronic expansion valve's required opening obtained during the last required opening adjustment, or the initial target electronic expansion valve's required opening.

[0060] That is to say, based on the actual superheat on the battery side and the adjusted superheat on the battery side, the initial target electronic expansion valve demand opening, or the target electronic expansion valve demand opening obtained during the last demand opening adjustment is adjusted for the current time, and the target electronic expansion valve demand opening after the current adjustment is obtained.

[0061] After the adjusted target electronic expansion valve required opening is obtained, the target electronic expansion valve required opening can be stored to facilitate the next required opening adjustment.

[0062] S203: Setting the target electronic expansion valve opening based on the adjusted target electronic expansion valve required opening.

[0063] In this embodiment, the target superheat on the battery side, i.e., the target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, is actively and dynamically adjusted based on the actual surface temperature of the evaporator and the set temperature of the air-conditioning panel to obtain the adjusted target superheat on the battery side. Based on the actual superheat on the battery side and the dynamically adjusted target superheat on the battery side, the required opening of the target electronic expansion valve is adjusted to obtain the adjusted required opening of the target electronic expansion valve, and the opening of the target electronic expansion valve is set based on the adjusted required opening of the target electronic expansion valve. This can achieve reasonable and effective distribution of the refrigerant flow during dual cooling, ensure the cooling rates on the cab side and the battery side, and achieve a balance between the cooling rates on the cab side and the battery side, thereby ensuring the cooling effect of the cab.

[0064] Since the lower the setting temperature of the air-conditioning panel, the evaporator surface temperature also needs to reach a lower temperature, that is, the lower the evaporator surface target temperature, there is a correlation between the evaporator surface target temperature and the air-conditioning panel setting temperature. In order to better ensure the cooling effect of the cab, in some embodiments, the target superheat on the battery side is adjusted based on the actual evaporator surface temperature and the air-conditioning panel setting temperature. When the adjusted target superheat on the battery side is obtained, the evaporator surface target temperature can be first determined based on the air-conditioning panel setting temperature, and then the battery side target superheat can be adjusted based on the actual evaporator surface temperature and the evaporator surface target temperature to obtain the adjusted target superheat on the battery side.

[0065] The above association relationship may be a corresponding relationship, that is, there is a one-to-one correspondence between the evaporator surface target temperature and the air conditioning panel setting temperature. At this time, the required evaporator surface target temperature is determined based on the association relationship between the air conditioning panel setting temperature and the evaporator surface target temperature.

[0066] Since the correspondence between the evaporator surface target temperature and the air conditioning panel setting temperature is generally stored in a preset table, the evaporator surface target temperature corresponding to the air conditioning panel setting temperature can be obtained by matching in the preset table according to the air conditioning panel setting temperature.

[0067] Among them, there is a positive correlation between the set temperature of the air conditioning panel and the target temperature of the evaporator surface.

[0068] For example, the corresponding relationship between the air conditioning panel setting temperature and the evaporator surface target temperature can be shown in the following Table 1.面板 Characterizes the air conditioning panel setting temperature, T 表面 Characterizes the evaporator surface target temperature, T 面板 When the temperature is 18℃, 19℃, 20℃, 21℃, 22℃, 23℃, 24℃, 25℃, 26℃, 27℃, 28℃, the corresponding T 表面 They are 4°C, 4.5°C, 5°C, 5.5°C, 6°C, 6.5°C, 7°C, 7.5°C, 8°C, 8.5°C, and 9°C respectively. Based on the correlation shown in Table 1, the closer the air conditioning panel setting temperature is to 18°C, the higher the target superheat on the battery side is adjusted, and the closer the target temperature on the evaporator surface is to 4°C.

[0069] Table 1

[0070] <![CDATA[T 面板 / ℃]]> 18 19 20 21 22 23 24 25 26 27 28 <![CDATA[T 表面 / ℃]]> 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9

[0071] Afterwards, based on the difference between the actual evaporator surface temperature and the target evaporator surface temperature, the battery side target superheat is adjusted to obtain an adjusted battery side target superheat.

[0072] Among them, the adjustment method can be proportional integral derivative (PID) adjustment, PI adjustment, etc. The specific adjustment method can be referred to the existing technology and will not be described in detail here.

[0073] In this embodiment, a match is made in a preset table according to the setting temperature of the air-conditioning panel to obtain a target surface temperature of the evaporator corresponding to the setting temperature of the air-conditioning panel, wherein the setting temperature of the air-conditioning panel is positively correlated with the target surface temperature of the evaporator. Thereafter, based on the difference between the actual surface temperature of the evaporator and the target surface temperature of the evaporator, the target superheat of the battery side is adjusted to obtain the adjusted target superheat of the battery side, thereby realizing dynamic adjustment of the target superheat of the battery side. By adjusting to obtain a reasonable target superheat of the battery side, the cooling effect on the battery side and the cooling effect on the cab side can be better taken into account, thereby avoiding the protection triggered by the evaporator surface temperature being too low in the cab, and avoiding the poor cooling effect caused by the evaporator surface temperature being too high, thereby effectively and reasonably ensuring the cooling effect of the cab and the battery.

[0074] In some embodiments, the required opening of the target electronic expansion valve is adjusted based on the actual superheat on the battery side and the adjusted target superheat on the battery side. Before obtaining the adjusted required opening of the target electronic expansion valve, the value range of the target superheat on the battery side is obtained, and based on the value range, the value of the adjusted target superheat on the battery side is corrected to avoid unreasonable value of the adjusted target superheat on the battery side.

[0075] The value range of the target overheat degree on the battery side is determined based on the actual operating conditions. For example, the value range of the target overheat degree on the battery side is [8°C, 30°C].

[0076] Specifically, if the adjusted value of the battery-side target superheat exceeds the corresponding value range, the adjusted value of the battery-side target superheat is corrected.

[0077] Correspondingly, if the adjusted value of the battery-side target superheat degree does not exceed the corresponding value range, the adjusted value of the battery-side target superheat degree will not be adjusted.

[0078] More specifically, if the adjusted target superheat value of the battery side is greater than the preset upper limit value of the superheat, the adjusted target superheat value of the battery side is replaced by the preset upper limit value of the superheat; if the adjusted target superheat value of the battery side is less than the preset lower limit value of the superheat, the adjusted target superheat value of the battery side is replaced by the preset lower limit value of the superheat. The preset upper limit value of the superheat is the upper limit of the value range of the target superheat of the battery side, and the preset lower limit value of the superheat is the lower limit of the value range of the target superheat of the battery side.

[0079] In this embodiment, after obtaining the adjusted target superheat of the battery side, when the value of the target superheat of the battery side is greater than the preset upper limit value of the superheat, the value of the target superheat of the battery side is replaced by the preset upper limit value of the superheat, and when the value of the target superheat of the battery side is less than the preset lower limit value of the superheat, the value of the target superheat of the battery side is replaced by the preset lower limit value of the superheat, so as to ensure the reliability and rationality of the adjusted value of the target superheat of the battery side, thereby ensuring the cooling effect.

[0080] In some embodiments, the required opening of the target electronic expansion valve is adjusted based on the actual superheat on the battery side and the adjusted target superheat on the battery side. When obtaining the adjusted required opening of the target electronic expansion valve, the difference between the actual superheat on the battery side and the adjusted target superheat on the battery side is first determined, and then based on the difference between the actual superheat on the battery side and the adjusted target superheat on the battery side, the required opening of the target electronic expansion valve is adjusted to obtain the adjusted required opening of the target electronic expansion valve.

[0081] Among them, the adjustment method can be proportional integral derivative (PID) adjustment, PI adjustment, etc. The specific adjustment method can be referred to the existing technology and will not be described in detail here.

[0082] In this embodiment, based on the difference between the actual superheat on the battery side and the adjusted target superheat on the battery side, the target electronic expansion valve demand opening is adjusted to obtain a reasonable adjusted target electronic expansion valve demand opening, thereby achieving a reasonable and effective distribution of the refrigerant flow during dual cooling based on the adjusted target electronic expansion valve demand opening, which can ensure the cooling rate on the cab side and the battery side, and achieve a balance between the cooling rates on the cab side and the battery side, thereby ensuring the cooling effect of the cab.

[0083] In some embodiments, before setting the actual opening of the target electronic expansion valve based on the required opening of the adjusted target electronic expansion valve, the value range of the required opening of the target electronic expansion valve is obtained, and based on the value range, the value of the required opening of the adjusted target electronic expansion valve is corrected to avoid unreasonable value of the required opening of the adjusted target electronic expansion valve.

[0084] The required opening value of the target electronic expansion valve may be determined based on actual working conditions.

[0085] Specifically, if the adjusted target required opening value of the electronic expansion valve exceeds the corresponding value range, the adjusted target required opening value of the electronic expansion valve is corrected.

[0086] Correspondingly, if the adjusted target required opening value of the electronic expansion valve does not exceed the corresponding value range, the adjusted target required opening value of the electronic expansion valve is not adjusted.

[0087] More specifically, if the value of the demand opening of the adjusted target electronic expansion valve is greater than the value of the preset upper limit of the demand opening, the value of the demand opening of the adjusted target electronic expansion valve is replaced by the value of the preset upper limit of the demand opening; if the value of the demand opening of the adjusted target electronic expansion valve is less than the value of the preset lower limit of the demand opening, the value of the demand opening of the adjusted target electronic expansion valve is replaced by the value of the preset lower limit of the demand opening.

[0088] In this embodiment, after obtaining the demand opening of the adjusted target electronic expansion valve, when the value of the demand opening of the target electronic expansion valve is greater than the preset upper limit value of the demand opening, the value of the demand opening of the target electronic expansion valve is replaced with the preset upper limit value of the demand opening, and when the value of the demand opening of the target electronic expansion valve is less than the preset lower limit value of the demand opening, the value of the demand opening of the target electronic expansion valve is replaced with the preset lower limit value of the demand opening, so as to ensure the reliability and rationality of the value of the demand opening of the adjusted target electronic expansion valve, thereby ensuring the refrigeration effect.

[0089] In some embodiments, when setting the opening of the target electronic expansion valve based on the required opening of the adjusted target electronic expansion valve, a control signal is first generated based on the required opening of the adjusted target electronic expansion valve, and then, in response to the control signal, the target electronic expansion valve is controlled to perform an action of adjusting the opening to the required opening of the adjusted target electronic expansion valve. In other words, the control signal is used to control the opening of the target electronic expansion valve to the required opening of the adjusted target electronic expansion valve.

[0090] In this way, after determining the required opening of the target electronic expansion valve, a control signal can be generated based on the required opening, and the target electronic expansion valve can be controlled by the control signal to perform the action of adjusting the opening to the required opening. In this way, the setting of the required opening of the target electronic expansion valve can be achieved, and based on the setting of the required opening, the effective and reasonable distribution of the refrigerant flow during dual cooling can be achieved, thereby ensuring the cooling rate of the battery and the cab and the cooling effect.

[0091] In some implementations, after controlling the target electronic expansion valve to perform an action of adjusting the opening to the required opening of the adjusted target electronic expansion valve in response to a control signal, the actual opening of the target electronic expansion valve is obtained, and then, based on the actual opening, the actual superheat on the battery side and the actual superheat on the evaporator surface are re-determined.

[0092] It is understandable that, in the process of adjusting the opening of the electronic expansion valve based on the actual control target, it may be affected by certain factors, resulting in that the actual opening of the electronic expansion valve after the final adjustment may be different from the required opening included in the control signal.

[0093] In this embodiment, after the target electronic expansion valve is controlled to perform the adjustment to the required opening of the target electronic expansion valve after adjustment, the actual opening of the target electronic expansion valve is obtained, which can effectively understand the situation of the control target electronic expansion valve to perform the action, so that corresponding measures can be taken in time when an abnormality occurs to avoid losses. In addition, based on the actual opening, the actual superheat of the battery side and the actual superheat of the evaporator surface are re-determined, which can facilitate the active and dynamic adjustment of the target superheat of the battery side, realize the real-time, effective and reasonable distribution of the refrigerant flow in the dual refrigeration process, better ensure the cooling rate of the cab and the battery and the balance of the cooling rates of the two, and ensure the cooling effect of the cab and the battery.

[0094] For example, taking the heat exchanger as a plate heat exchanger, and the heat exchanger outlet as the plate heat exchanger outlet, when the thermal management air conditioning system is in the dual cooling mode of the cab and the battery, the process of adjusting the opening of the electronic expansion valve can be as follows: Figure 3 shown.

[0095] Among them, based on the air conditioning panel setting temperature, the evaporator surface target temperature corresponding to the air conditioning panel setting temperature is determined by looking up the table, that is, matching in the preset table. Based on the difference between the evaporator surface target temperature and the actual evaporator surface temperature, combined with the proportional parameter K p , integration parameter K i , differential parameter K d The target superheat is adjusted and corrected according to the PI(D) formula, as well as the upper and lower limits of the target superheat on the battery side, including an upper limit of 30°C and a lower limit of 8°C, to determine the target superheat at the plate exchange outlet.

[0096] Then, based on the difference between the target superheat at the plate exchanger outlet and the actual superheat at the plate exchanger outlet, combined with the proportional parameter K p , integration parameter K i , differential parameter K d The required opening of the valve is adjusted and corrected according to the PI(D) formula, as well as the upper and lower limits of the required opening of the electronic expansion valve (EXV) on the battery side, i.e., the upper and lower limits of the required opening of the target electronic expansion valve, to determine the required opening of the EXV on the battery side, and based on the required opening, the corresponding opening adjustment action is performed to obtain the actual opening of the EXV on the battery side.

[0097] Finally, the actual opening is fed back to the thermal management air conditioning system, and the actual superheat of the plate exchange outlet and the actual temperature of the evaporator surface are re-determined, so as to continue to actively and dynamically adjust the target superheat on the battery side and re-determine the required opening of the EXV on the battery side, so as to achieve reasonable and effective adjustment of the opening of the EXV on the battery side and ensure the cooling effect.

[0098] like Figure 4 As shown, an embodiment of the present application also provides an electronic expansion valve opening adjustment device, which is applied to a thermal management air-conditioning system, wherein the thermal management air-conditioning system is in a dual cooling mode of the cab and the battery, and the device includes a first adjustment module 401, a second adjustment module 402 and an opening setting module 403.

[0099] in,

[0100] The first adjustment module 401 is used to adjust the target superheat degree of the battery side based on the actual surface temperature of the evaporator and the set temperature of the air conditioning panel to obtain the adjusted target superheat degree of the battery side, wherein the target superheat degree of the battery side is a target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the heat exchanger is used for heat exchange to reduce the battery temperature;

[0101] The second regulating module 402 is used to regulate the required opening of the target electronic expansion valve based on the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side to obtain the adjusted required opening of the target electronic expansion valve, wherein the actual superheat degree on the battery side is the actual difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the target electronic expansion valve is used to regulate the flow rate of the refrigerant flowing to the heat exchanger;

[0102] The opening setting module 403 is used to set the opening of the target electronic expansion valve based on the adjusted required opening of the target electronic expansion valve.

[0103] The electronic expansion valve opening adjustment device provided in this embodiment belongs to the same application concept as the electronic expansion valve opening adjustment method provided in the above embodiment of this application, and can execute the method provided in any of the above embodiments of this application, and has the corresponding functional modules and beneficial effects of the execution method. For the technical details not fully described in this embodiment, please refer to the specific processing content of the electronic expansion valve opening adjustment method provided in the above embodiment of this application, which will not be repeated here.

[0104] The functions implemented by the above first adjustment module 401, the second adjustment module 402 and the opening setting module 403 can be implemented in the form of software called by the same or different processors, which is not limited in the embodiment of the present application.

[0105] Another embodiment of the present application also provides an electronic device, see Figure 5 As shown, the electronic device includes: a memory 500 and a processor 501.

[0106] The memory 500 is connected to the processor 501 and is used to store programs;

[0107] The processor 501 is used to implement the electronic expansion valve opening adjustment method disclosed in any of the above embodiments by running the program stored in the memory 500.

[0108] Specifically, the electronic device may further include: a bus, a communication interface 502 , an input device 503 and an output device 504 .

[0109] The processor 501, the memory 500, the communication interface 502, the input device 503 and the output device 504 are connected to each other via a bus.

[0110] A bus may include a pathway that transfers information between components of a computer system.

[0111] The processor 501 may be a general-purpose processor, such as a general-purpose central processing unit (CPU), a microprocessor, etc., or an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. It may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0112] The processor 501 may include a main processor, and may also include a baseband chip, a modem, etc.

[0113] The memory 500 stores a program for executing the technical solution of the present application, and may also store an operating system and other key services. Specifically, the program may include a program code, and the program code includes computer operation instructions. More specifically, the memory 500 may include a read-only memory (ROM), other types of static storage devices that can store static information and instructions, a random access memory (RAM), other types of dynamic storage devices that can store information and instructions, a disk storage, a flash, and the like.

[0114] The input device 503 may include a device for receiving data and information input by a user, such as a keyboard, a mouse, a camera, a scanner, a light pen, a voice input device, a touch screen, a pedometer, or a gravity sensor.

[0115] Output device 504 may include a device that allows information to be output to a user, such as a display screen, printer, speaker, etc.

[0116] The communication interface 502 may include any transceiver or the like to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

[0117] The processor 501 executes the program stored in the memory 500 and calls other devices, which can be used to implement each step of any electronic expansion valve opening adjustment method provided in the above embodiments of the present application.

[0118] Those skilled in the art will understand that Figure 5 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0119] An embodiment of the present application also proposes a chip, which includes a processor and a data interface. The processor reads and runs a program stored in a memory through the data interface to execute the electronic expansion valve opening adjustment method introduced in any of the above embodiments. The specific processing process and its beneficial effects can be found in the introduction to the embodiment of the electronic expansion valve opening adjustment method mentioned above.

[0120] An embodiment of the present application also provides a vehicle, in which the above-mentioned electronic expansion valve opening adjustment device or the above-mentioned electronic device is provided.

[0121] In addition to the above-mentioned methods and devices, an embodiment of the present application proposes a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the electronic expansion valve opening adjustment method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0122] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0123] In addition, an embodiment of the present application also proposes a storage medium on which a computer program is stored, and the computer program is executed by a processor to execute the steps of the electronic expansion valve opening adjustment method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0124] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0125] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0126] It should also be noted that in the device, apparatus and method of the present invention, each component or each step can be decomposed and / or reassembled, and such decomposition and / or reassembly should be regarded as an equivalent solution of the present invention.

[0127] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0128] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present invention are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present invention.

[0129] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for adjusting the opening of an electronic expansion valve, characterized in that: Applied to a thermal management air conditioning system, the thermal management air conditioning system is in a dual cooling mode of a cab and a battery, the method comprising: Based on the actual surface temperature of the evaporator and the set temperature of the air conditioning panel, the target superheat degree of the battery side is adjusted to obtain the adjusted target superheat degree of the battery side, wherein the target superheat degree of the battery side is the target difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the heat exchanger is used for heat exchange to reduce the battery temperature; Based on the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side, the required opening degree of the target electronic expansion valve is adjusted to obtain the adjusted required opening degree of the target electronic expansion valve, wherein the actual superheat degree on the battery side is the actual difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the target electronic expansion valve is used to adjust the flow rate of the refrigerant flowing to the heat exchanger; The target opening of the electronic expansion valve is set based on the adjusted required opening of the target electronic expansion valve.

2. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: The method of adjusting the target superheat degree of the battery side based on the actual surface temperature of the evaporator and the set temperature of the air conditioning panel to obtain the adjusted target superheat degree of the battery side includes: According to the air conditioning panel setting temperature, a match is made in a preset table to obtain an evaporator surface target temperature corresponding to the air conditioning panel setting temperature, and there is a positive correlation between the air conditioning panel setting temperature and the evaporator surface target temperature; Based on the difference between the actual evaporator surface temperature and the target evaporator surface temperature, the battery side target superheat is adjusted to obtain the adjusted battery side target superheat.

3. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: Before adjusting the required opening of the target electronic expansion valve based on the actual superheat of the battery side and the adjusted target superheat of the battery side to obtain the adjusted required opening of the target electronic expansion valve, the method further includes: If the adjusted target superheat value of the battery side is greater than the preset upper limit value of the superheat degree, the adjusted target superheat value of the battery side is replaced by the preset upper limit value of the superheat degree; If the adjusted target superheat value of the battery side is less than the preset lower limit value of the superheat degree, the adjusted target superheat value of the battery side is replaced by the preset lower limit value of the superheat degree.

4. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: The step of adjusting the required opening of the target electronic expansion valve based on the actual superheat of the battery side and the adjusted target superheat of the battery side to obtain the adjusted required opening of the target electronic expansion valve includes: Based on the difference between the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side, the required opening degree of the target electronic expansion valve is adjusted to obtain the adjusted required opening degree of the target electronic expansion valve.

5. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: Before setting the actual opening of the target electronic expansion valve based on the adjusted required opening of the target electronic expansion valve, the method further includes: If the adjusted target electronic expansion valve required opening value is greater than the preset required opening upper limit value, the adjusted target electronic expansion valve required opening value is replaced by the preset required opening upper limit value; If the adjusted target electronic expansion valve required opening value is less than the preset required opening lower limit value, the adjusted target electronic expansion valve required opening value is replaced by the preset required opening lower limit value.

6. The method for adjusting the opening of an electronic expansion valve according to any one of claims 1 to 5, characterized in that: The step of setting the target opening of the electronic expansion valve based on the adjusted target required opening of the electronic expansion valve comprises: Based on the adjusted required opening of the target electronic expansion valve, generating a control signal, wherein the control signal is used to control the opening of the target electronic expansion valve to be the adjusted required opening of the target electronic expansion valve; In response to the control signal, the target electronic expansion valve is controlled to perform an action of adjusting the opening degree to the required opening degree of the adjusted target electronic expansion valve.

7. The method for adjusting the opening of an electronic expansion valve according to claim 6, characterized in that: After the action of controlling the target electronic expansion valve to adjust the opening degree to the required opening degree of the adjusted target electronic expansion valve in response to the control signal, the method further includes: Acquiring an actual opening degree of the target electronic expansion valve; Based on the actual opening degree, the actual superheat degree on the battery side and the actual superheat degree on the evaporator surface are re-determined.

8. An electronic expansion valve opening adjustment device, characterized in that: Applied to a thermal management air conditioning system, the thermal management air conditioning system is in a dual cooling mode of a cab and a battery, and the device comprises: a first regulating module, configured to regulate a target superheat degree on the battery side based on an actual surface temperature of the evaporator and a set temperature of the air conditioning panel, to obtain an regulated target superheat degree on the battery side, wherein the target superheat degree on the battery side is a target difference between a temperature of a refrigerant flowing out of a heat exchanger and a saturation temperature of the refrigerant, wherein the heat exchanger is used for heat exchange to reduce a battery temperature; a second regulating module, configured to regulate the required opening of the target electronic expansion valve based on the actual superheat degree on the battery side and the adjusted target superheat degree on the battery side, so as to obtain the required opening of the adjusted target electronic expansion valve, wherein the actual superheat degree on the battery side is the actual difference between the temperature of the refrigerant flowing out of the heat exchanger and the saturation temperature of the refrigerant, and the target electronic expansion valve is used to regulate the flow rate of the refrigerant flowing to the heat exchanger; The opening setting module is used to set the opening of the target electronic expansion valve based on the adjusted required opening of the target electronic expansion valve.

9. An electronic device, characterized in that: including memory and processor; The memory is connected to the processor and is used to store programs; The processor is used to implement the electronic expansion valve opening adjustment method according to any one of claims 1 to 7 by running the program in the memory.

10. A vehicle, characterized in that: The vehicle is provided with the electronic expansion valve opening adjustment device as claimed in claim 8 or the electronic device as claimed in claim 9.

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