Vehicle refrigeration system control method, electronic device, and storage medium

Abstract

The present disclosure provides a vehicle refrigeration system control method, an electronic device and a storage medium, and relates to the technical field of vehicles. The method comprises the following steps: obtaining an actual battery temperature and a target battery temperature in a target vehicle; adjusting the opening degrees of a first expansion valve and a second expansion valve according to the actual battery temperature; determining a maximum rotation speed limit value of a compressor according to a first temperature difference between the actual battery temperature and the target battery temperature; and adjusting the current rotation speed of the compressor to the maximum rotation speed limit value if the current rotation speed of the compressor is greater than the maximum rotation speed limit value. The embodiment of the present disclosure can effectively control the noise generated when the compressor is working, and preferentially meet the current relatively strong refrigeration demand by adjusting the opening degrees of the expansion valves, so as to balance the vehicle refrigeration demand and the noise control demand.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to a vehicle refrigeration system control method, electronic device, and storage medium. Background Technology

[0002] During vehicle operation, the refrigeration system must ensure that passengers are at a comfortable temperature while also cooling the battery to ensure its safety.

[0003] However, in related technologies, the cooling needs of passengers and batteries cannot be balanced. When passengers and / or batteries have strong cooling demands, the only way to meet these demands is to continuously increase the compressor speed. This method generates a lot of noise, resulting in a poor passenger experience. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a vehicle refrigeration system control method, electronic device and storage medium.

[0005] According to a first aspect of the present disclosure, a vehicle refrigeration system control method is provided, the refrigeration system including a compressor and a battery refrigeration circuit and a passenger compartment refrigeration circuit connected in parallel with the compressor;

[0006] The battery cooling circuit includes a first expansion valve and a cooler. The cooler is used to cool the battery in the target vehicle, and the first expansion valve is used to control the cooling efficiency of the cooler.

[0007] The passenger compartment cooling circuit includes a second expansion valve and a front evaporator. The front evaporator is used to cool the passenger compartment in the target vehicle, and the second expansion valve is used to control the cooling efficiency of the front evaporator.

[0008] The method includes:

[0009] Obtain the actual battery temperature and target battery temperature in the target vehicle;

[0010] Adjust the opening degree of the first expansion valve and the second expansion valve according to the actual temperature of the battery;

[0011] The maximum speed limit of the compressor is determined based on the first temperature difference between the actual battery temperature and the target battery temperature.

[0012] If the compressor's current speed is greater than the maximum speed limit, then adjust the current speed to the maximum speed limit.

[0013] In some embodiments, adjusting the opening degree of the first expansion valve and the second expansion valve according to the actual battery temperature includes:

[0014] If the actual battery temperature is greater than or equal to the battery temperature limit, increase the opening of the first expansion valve and decrease the opening of the second expansion valve.

[0015] In some embodiments, adjusting the opening degree of the first expansion valve and the second expansion valve according to the actual battery temperature includes:

[0016] If the actual battery temperature is lower than the battery temperature limit, reduce the opening of the first expansion valve and increase the opening of the second expansion valve.

[0017] In some embodiments, the opening adjustment amount of the first expansion valve and the second expansion valve is determined based on the first temperature difference.

[0018] In some embodiments, determining the maximum speed limit of the compressor based on a first temperature difference between the actual battery temperature and the target battery temperature includes:

[0019] Obtain the first speed limit of the compressor;

[0020] Determine the speed adjustment coefficient based on the first temperature difference;

[0021] Based on the speed adjustment coefficient, the first speed limit is adjusted to obtain the maximum speed limit.

[0022] In some embodiments, obtaining a second speed limit for the compressor includes:

[0023] Obtain the actual temperature of the passenger compartment, vehicle speed, and air volume output through the front evaporator of the target vehicle.

[0024] The second speed limit of the compressor is determined based on the actual temperature and air volume in the crew cabin;

[0025] The first speed limit is obtained by adjusting the second speed limit based on the vehicle speed.

[0026] In some embodiments, the method further includes:

[0027] Obtain the ambient temperature outside the vehicle;

[0028] The first speed limit is adjusted based on the ambient temperature outside the vehicle to obtain a new first speed limit.

[0029] In some embodiments, the method further includes:

[0030] Obtain the second temperature difference, which is the temperature difference between the actual temperature of the crew cabin and the target temperature of the crew cabin.

[0031] Based on the second temperature difference, determine the speed correction value for the first speed limit;

[0032] The first speed limit is adjusted based on the speed correction value.

[0033] In some embodiments, adjusting the current speed to the maximum speed limit includes:

[0034] The speed adjustment gradient is determined based on the difference between the current speed and the maximum speed limit;

[0035] Adjust the current speed to the maximum speed limit based on the speed adjustment gradient.

[0036] In some embodiments, the method further includes:

[0037] If the high-pressure side pressure of the compressor exceeds the preset pressure threshold, the maximum speed limit will be reduced.

[0038] In some embodiments, the method further includes:

[0039] The compressor will be shut down if the compressor's exhaust temperature exceeds a preset temperature threshold.

[0040] According to a second aspect of the present disclosure, a vehicle refrigeration system control device is provided, the refrigeration system including a compressor and a battery refrigeration circuit and a passenger compartment refrigeration circuit connected in parallel with the compressor;

[0041] The battery cooling circuit includes a first expansion valve and a cooler. The cooler is used to cool the battery in the target vehicle, and the first expansion valve is used to control the cooling efficiency of the cooler.

[0042] The passenger compartment cooling circuit includes a second expansion valve and a front evaporator. The front evaporator is used to cool the passenger compartment in the target vehicle, and the second expansion valve is used to control the cooling efficiency of the front evaporator.

[0043] The device includes:

[0044] The acquisition module is used to acquire the actual battery temperature and the target battery temperature in the target vehicle.

[0045] The first adjustment module is used to adjust the opening degree of the first expansion valve and the second expansion valve according to the actual temperature of the battery.

[0046] The determination module is used to determine the maximum speed limit of the compressor based on the first temperature difference between the actual battery temperature and the target battery temperature;

[0047] The second adjustment module is used to adjust the current speed to the maximum speed limit if the current speed of the compressor is greater than the maximum speed limit.

[0048] According to a third aspect of the present disclosure, an electronic device is provided, comprising:

[0049] Processor; and

[0050] Memory is used to store the processor's executable instructions;

[0051] The processor is configured to execute the method of the first aspect of the present disclosure by executing executable instructions.

[0052] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method of the first aspect of the present disclosure.

[0053] The technical solutions provided in this disclosure may have the following beneficial effects:

[0054] The vehicle refrigeration system control method provided in this disclosure can adjust the opening degree of the first expansion valve in the battery refrigeration circuit and the second expansion valve in the passenger compartment cooling circuit according to the actual battery temperature. It also determines the maximum speed limit of the compressor based on the first temperature difference between the actual battery temperature and the target battery temperature. If the current compressor speed is greater than the maximum speed limit, the current speed is adjusted to the maximum speed limit. The solution provided in this disclosure can simultaneously control the vehicle's refrigeration system from two aspects: the expansion valve opening degree and the maximum speed limit. Adjusting the expansion valve opening degree can regulate the cooling priority of the passenger compartment and the battery, while limiting the maximum speed limit can restrict the compressor speed to a level that meets the cooling demand, avoiding unnecessary noise increases caused by excessive compressor speed increases. The combination of these two methods can effectively control the noise generated during compressor operation and prioritize meeting the current stronger cooling demand by adjusting the expansion valve opening, thus balancing the vehicle's cooling needs and noise control requirements.

[0055] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0056] Figure 1 A schematic diagram of the structure of a refrigeration system according to an embodiment of the present disclosure is shown.

[0057] Figure 2 This diagram illustrates a flow chart of a vehicle refrigeration system control method according to an embodiment of the present disclosure.

[0058] Figure 3 A flowchart illustrating a method for determining the maximum speed limit of a compressor according to an embodiment of this disclosure is shown.

[0059] Figure 4 A flowchart illustrating a method for determining a first rotational speed limit according to an embodiment of this disclosure is shown.

[0060] Figure 5 A schematic diagram of the structure of a vehicle refrigeration system control device according to an embodiment of the present disclosure is shown.

[0061] Figure 6 A schematic diagram of the structure of an electronic device according to an embodiment of the present disclosure is shown. Detailed Implementation

[0062] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0063] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0064] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0065] The application scenarios of the embodiments of this disclosure will be described below.

[0066] The vehicle refrigeration system control method provided in this disclosure can be applied to any vehicle equipped with a refrigeration system. The refrigeration system is a compressor-based refrigeration system.

[0067] Specifically, Figure 1This diagram illustrates the structure of a refrigeration system according to an embodiment of the present disclosure. The refrigeration system includes a refrigerant collector 101, a compressor 102, and an external condenser 103, connected in parallel with the battery refrigeration circuit and the passenger compartment refrigeration circuit, respectively. The battery refrigeration circuit includes a first expansion valve 104 and a chiller 105. The chiller 105 is used to cool the battery in the vehicle. The opening degree of the first expansion valve 104 can be adjusted to control the cooling efficiency of the chiller 105. The passenger compartment refrigeration circuit includes a second expansion valve 106 and a front evaporator 107. The front evaporator 107 is used to cool the passenger compartment in the vehicle. The opening degree of the second expansion valve 106 can be adjusted to control the cooling efficiency of the front evaporator 107. Furthermore, a blower (not shown) is provided at the front evaporator 107 to blow cold air from near the front evaporator 107 into the passenger compartment. A cooling fan 108 for heat dissipation is also provided at the external condenser 103.

[0068] During the refrigeration process, the refrigerant in the refrigerant collector 101 is transformed into a high-temperature, high-pressure gas by the compressor 102. After being cooled by the external condenser 103, it becomes a foamy gas-liquid mixture, which then passes through the battery refrigeration circuit and the crew cabin refrigeration circuit, thus simultaneously cooling both the crew cabin and the battery. Finally, the refrigerant output from the battery refrigeration circuit and the crew cabin refrigeration circuit re-enters the refrigerant collector 101, completing the refrigeration cycle for both circuits.

[0069] Next, the exemplary embodiments of this disclosure will be described in detail with reference to the above application scenarios.

[0070] First, this disclosure provides a vehicle refrigeration system control method, which can be executed by any electronic device. Exemplarily, it can be executed by a proportional-integral-derivative (PID) controller in the vehicle to achieve automated control of the compressor and the opening degree of the expansion valve.

[0071] Specifically, Figure 2 This diagram illustrates a flow chart of a vehicle refrigeration system control method according to an embodiment of the present disclosure, as shown below. Figure 2 As shown, the vehicle refrigeration system control method provided in this embodiment includes the following steps.

[0072] S201, Obtain the actual battery temperature and target battery temperature in the target vehicle.

[0073] It should be noted that the target vehicle can be a vehicle in motion or a stationary vehicle. It is understood that the embodiments of this disclosure aim to ensure battery safety and minimize compressor noise by controlling the refrigeration system in the target vehicle, thereby ensuring passenger comfort. Therefore, this disclosure does not limit the operating state of the target vehicle itself when the refrigeration system is in operation.

[0074] It should be noted that the actual battery temperature can be obtained by measuring the temperature of the coolant at the battery inlet using a sensor. The target battery temperature can be understood as the battery's normal operating temperature, which can be set by the user or preset in the system.

[0075] S202, adjust the opening degree of the first expansion valve and the second expansion valve according to the actual temperature of the battery.

[0076] It should be noted that the first expansion valve and the second expansion valve can be electronic expansion valves. By adjusting the opening degree of the first expansion valve and the second expansion valve, the refrigerant flowing into the battery cooling circuit and the crew compartment cooling circuit can be distributed, thereby controlling the cooling priority of the battery and the crew compartment.

[0077] In some embodiments, when the actual battery temperature is greater than or equal to the battery temperature limit, the opening of the first expansion valve can be increased and the opening of the second expansion valve can be decreased.

[0078] In other embodiments, when the actual battery temperature is less than the battery temperature limit, the opening of the first expansion valve can be reduced and the opening of the second expansion valve can be increased.

[0079] The battery temperature limit can be the highest temperature at which the battery can operate safely. Alternatively, the battery temperature limit can be set lower than the highest safe operating temperature, thus allowing for a margin of safety and improving battery performance.

[0080] When the actual temperature of the battery is greater than or equal to the battery temperature limit, the battery is considered to have a strong cooling demand. At this time, by increasing the opening of the first expansion valve and decreasing the opening of the second expansion valve, the cooling efficiency of the cooler for the battery can be effectively improved at a constant compressor speed, thereby rapidly cooling the battery and ensuring its safety.

[0081] When the actual temperature of the battery is lower than the battery temperature limit, the cooling demand of the battery is considered weak. At this time, by reducing the opening of the first expansion valve and increasing the opening of the second expansion valve, the cooling efficiency of the front evaporator for the passenger compartment can be effectively improved at a constant compressor speed, thereby quickly meeting the cooling needs of passengers and improving passenger comfort.

[0082] Understandably, while increasing compressor speed can improve cooling efficiency to some extent, a small increase in compressor speed has a limited impact on cooling efficiency, while a large increase in compressor speed will generate a lot of noise, which will also affect passenger comfort.

[0083] Therefore, the embodiments of this disclosure can quickly adjust the cooling efficiency of the passenger compartment and the battery by simultaneously adjusting the opening of the first expansion valve and the second expansion valve, thereby balancing the cooling needs of the passenger compartment and the battery.

[0084] For example, the first temperature difference between the actual battery temperature and the target battery temperature can also reflect the battery's cooling demand. It is understood that when the battery has a cooling demand, the actual battery temperature is greater than the target battery temperature; in this case, the larger the first temperature difference, the stronger the battery's cooling demand. Therefore, the opening adjustment amount of the first expansion valve and the second expansion valve can be determined based on the first temperature difference.

[0085] For example, when the first temperature difference is greater than 0°C and less than or equal to 5°C, the opening of the first expansion valve can be increased by 10% and the opening of the second expansion valve can be decreased by 10%. When the first temperature difference is greater than 5°C and less than or equal to 10°C, the opening of the first expansion valve can be increased by 20% and the opening of the second expansion valve can be decreased by 20%. This disclosure will not list all of these in detail.

[0086] When the first temperature difference is less than 0°C, meaning the actual battery temperature is less than the target battery temperature, it is assumed that the battery has no cooling requirement or that its cooling requirement has been met. In this case, the opening of the first expansion valve can be reduced and the opening of the second expansion valve can be increased based on the first temperature difference. When the actual battery temperature is significantly lower than the target battery temperature (e.g., the first temperature difference is less than -10°C), the opening of the first expansion valve can even be adjusted to 0% and the opening of the second expansion valve can be set to 100% to rapidly cool the passenger compartment and meet the passengers' cooling needs.

[0087] S203 determines the maximum speed limit of the compressor based on the first temperature difference between the actual battery temperature and the target battery temperature.

[0088] As mentioned earlier, the first temperature difference reflects the battery's cooling requirements. When the actual battery temperature is significantly higher than the target battery temperature, the battery is considered to have a relatively strong cooling demand. In this case, the maximum speed limit of the compressor can be appropriately increased, allowing the compressor to operate at a higher speed to meet the battery's cooling needs and improve vehicle driving safety.

[0089] Correspondingly, when the actual battery temperature is much lower than the target battery temperature, the battery's cooling requirements are considered to be met. At this point, the maximum speed limit of the compressor can be appropriately reduced, allowing the compressor to operate at a lower speed, thereby reducing the impact of compressor noise and vibration on passengers.

[0090] Based on the above principle, the maximum speed limit of the compressor can be adjusted so that the cooling power output of the compressor can meet the needs of both the battery and the passenger compartment, without causing unnecessary noise due to excessive speed.

[0091] S204 If the current speed of the compressor is greater than the maximum speed limit, then adjust the current speed to the maximum speed limit.

[0092] It should be noted that in this embodiment, the value calculated in S203 is the maximum speed limit of the compressor, which is the maximum speed that can balance passenger comfort while considering compressor noise. However, during actual compressor operation, the current speed may be greater than this maximum speed limit, or it may be less than or equal to it. If the current speed is greater than the maximum speed limit, it can be adjusted to that limit. If the current speed is less than or equal to the maximum speed limit, no adjustment is needed since it does not exceed the maximum speed limit.

[0093] In some embodiments, when adjusting the current speed of the compressor, the adjustment can be made according to a specified gradient, thereby avoiding sudden noise changes caused by jumps in compressor speed.

[0094] For example, the speed adjustment gradient can be determined based on the difference between the current speed and the maximum speed limit. Then, the current speed is adjusted to the maximum speed limit based on the speed adjustment gradient.

[0095] For example, if the difference between the current speed and the maximum speed limit is too large, the speed adjustment gradient can be appropriately reduced so that the current speed of the compressor smoothly transitions to the maximum speed limit, avoiding large jumps in the compressor speed.

[0096] It should be understood that the speed adjustment gradient can also be applied to any scenario where the current compressor speed needs to be adjusted. For example, increasing or decreasing the current compressor speed without exceeding the maximum speed limit; this disclosure does not limit this.

[0097] In some embodiments, the maximum speed limit of the compressor should also take into account the protection of the compressor itself.

[0098] For example, if the high-pressure side pressure of the compressor exceeds a preset pressure threshold, the maximum speed limit can be reduced to protect the compressor from high pressure. The specific reduction range of the maximum speed limit can be set according to the compressor's performance. After reducing the maximum speed limit, if the high-pressure side pressure of the compressor still exceeds the preset pressure threshold after a certain period of time, the compressor can be shut down until the high-pressure side pressure is less than or equal to the preset pressure threshold to avoid damage to the compressor.

[0099] For example, if the compressor's exhaust temperature exceeds a preset temperature threshold, the compressor can be shut down to provide high-temperature protection and prevent damage to the compressor.

[0100] It is understood that the protection methods for the compressor are not limited to the two mentioned above, and any compressor protection method can be applied to the compressor in the embodiments of this disclosure.

[0101] The solution provided in this disclosure allows for simultaneous control of the vehicle's refrigeration system through both the expansion valve opening and the maximum speed limit. Adjusting the expansion valve opening prioritizes the cooling of the passenger compartment and the battery, while limiting the maximum speed keeps the compressor's speed within acceptable limits to meet cooling demands, preventing excessive noise increases caused by excessive compressor speed. The combination of these two measures effectively controls the noise generated by the compressor during operation, and by adjusting the expansion valve opening to prioritize the most pressing cooling needs, it balances both the vehicle's cooling requirements and noise control requirements.

[0102] The following will combine Figure 3 The method for determining the maximum speed limit of the compressor in S203 is explained in detail.

[0103] Specifically, Figure 3 This diagram illustrates a flowchart of a method for determining the maximum speed limit of a compressor according to an embodiment of the present disclosure. Figure 3 As shown in the embodiments of this disclosure, the method for determining the maximum speed limit of the compressor includes the following steps.

[0104] S301, obtain the first speed limit of the compressor.

[0105] It should be noted that the first speed limit can be the speed limit preset by the compressor under normal operating conditions.

[0106] In some embodiments, the preset speed limit of the compressor may only take into account the safety and sustainable operation of the compressor, without considering the impact of the noise generated by the compressor during operation on passengers, or whether it can adequately meet the vehicle's cooling needs.

[0107] Therefore, this disclosure also provides a method for determining a first speed limit, so that the compressor can meet the vehicle's cooling needs while minimizing its speed, thereby reducing the noise generated by the compressor during operation and improving passenger comfort.

[0108] Specifically, such as Figure 4 As shown, the method for determining the first speed limit provided in this embodiment includes the following steps.

[0109] S401, obtains the actual temperature of the passenger compartment of the target vehicle, the vehicle speed, and the air volume output through the front evaporator.

[0110] In some embodiments, the actual temperature of the passenger compartment is the temperature inside the passenger compartment of the target vehicle, i.e., the temperature within the passenger space. The vehicle speed is the travel speed of the target vehicle, wherein the vehicle speed is 0 km / h when the target vehicle is stationary. The air volume output through the front evaporator is the air volume output by the blower in the refrigeration system to the passenger compartment through the front evaporator.

[0111] For example, the actual temperature of the passenger compartment, vehicle speed, and air volume can all be obtained by installing corresponding sensors in the target vehicle, which will not be elaborated in this embodiment.

[0112] S402 determines the second speed limit of the compressor based on the actual temperature and air volume in the passenger compartment.

[0113] It should be noted that the second speed limit can be determined by referring to a table based on the actual temperature and airflow in the passenger compartment. Table 1 is an exemplary table of second speed limits in this disclosure.

[0114] Table 1 Second Speed ​​Limit Table

[0115]

[0116] Table 1 shows the relationship between the actual temperature and airflow in the passenger compartment and the second speed limit. In Table 1, the first row is the actual temperature of the passenger compartment (unit: °C), and the first column is the airflow (unit: kg / h). The second speed limit (unit: rpm) is obtained by intersecting the actual temperature and airflow in the passenger compartment pairwise in Table 1.

[0117] The greater the airflow from the blower in the refrigeration system, the greater the wind noise. Wind noise is unavoidable during refrigeration system operation, and it can, to some extent, mask the noise generated by the compressor inside the vehicle, reducing passenger perception of compressor noise. Therefore, as shown in Table 1, at the same temperature, the compressor speed can increase with increasing airflow.

[0118] In addition, by establishing the relationship between compressor speed and air volume, excess cooling capacity caused by a large compressor cooling capacity but a small air volume can be avoided.

[0119] S403, adjust the second speed limit according to the vehicle speed to obtain the first speed limit.

[0120] It should be noted that tire noise increases with vehicle speed. Similar to wind noise, tire noise is unavoidable during vehicle operation, and it can also, to some extent, mask the noise generated by the compressor inside the vehicle, reducing passenger perception of compressor noise. Therefore, the second speed limit can be further adjusted based on vehicle speed to obtain the maximum speed limit for the compressor.

[0121] In some embodiments, a pre-configured speed influence coefficient can be matched according to the vehicle speed. For example, when the vehicle speed reaches 40 km / h, the speed adjustment coefficient is 1; when the vehicle speed reaches 60 km / h, the speed adjustment coefficient is 1.05; and when the vehicle speed reaches 80 km / h, the speed adjustment coefficient is 1.08. Multiplying the speed influence coefficient by the second speed limit value yields the maximum speed limit value.

[0122] Therefore, the first speed limit obtained by the method provided in this embodiment can better balance the cooling needs of passengers and the needs for noise control.

[0123] In some embodiments, the ambient temperature outside the target vehicle may also be taken into account when calculating the first speed limit of the compressor.

[0124] Specifically, the ambient temperature outside the vehicle can be obtained. Then, the first speed limit obtained in S303 is adjusted based on the ambient temperature outside the vehicle to obtain a new first speed limit.

[0125] The ambient temperature outside the vehicle can be collected by sensors. Since the ambient temperature can affect the cooling speed and cooling effect, adjusting the first speed limit based on the ambient temperature can prevent slow cooling speed and poor cooling effect caused by excessively high ambient temperature or an excessively low first speed limit for the compressor.

[0126] For example, an ambient temperature influence coefficient can be matched according to the ambient temperature. For instance, when the ambient temperature is between 30°C and 40°C, the ambient temperature influence coefficient can be 1.1, and when the ambient temperature is above 40°C, the ambient temperature influence coefficient can be 1.2. Multiplying the ambient temperature influence coefficient by the first speed limit obtained in S303 yields a new first speed limit.

[0127] The embodiments disclosed herein can appropriately increase the first speed limit of the compressor when the ambient temperature is too high, thereby meeting the vehicle's cooling needs.

[0128] In some embodiments, the calculated first speed limit can be corrected based on the temperature difference between the actual temperature of the passenger cabin and the target temperature of the passenger cabin, so as to quickly meet the cooling needs of passengers when the target temperature of the passenger cabin set by the passengers is low.

[0129] Specifically, a second temperature difference can be obtained. Based on the second temperature difference, a speed correction value for the first speed limit can be determined. Subsequently, the first speed limit is corrected based on the speed correction value. The second temperature difference is the temperature difference between the actual temperature of the crew cabin and the target temperature of the crew cabin.

[0130] The target temperature for the passenger cabin can be set by the passengers, representing the temperature they desire to achieve within the cabin. When the passenger's target temperature is significantly lower than the actual cabin temperature, it is considered that the passenger has a strong need for cooling. In this case, the compressor's initial speed limit can be appropriately increased, allowing the compressor to operate at a higher speed to meet the passenger's cooling needs and quickly lower the actual cabin temperature to the passenger's desired temperature, thus improving passenger comfort.

[0131] Correspondingly, when the passenger's target temperature in the passenger cabin is much higher than the actual temperature in the passenger cabin, it is considered that the passenger's cooling needs have been met. At this time, the first speed limit of the compressor can be appropriately reduced, allowing the compressor to operate at a lower speed, thereby reducing the impact of compressor noise and vibration on the passenger.

[0132] For example, the speed correction value can be obtained by looking up a table. Table 2 is an exemplary table of speed correction values ​​in this disclosure.

[0133] Table 2 Speed ​​Correction Values

[0134]

[0135] In Table 2, the first row represents the first speed limit before correction (unit: rpm). Exemplarily, this first speed limit before correction can be either the first speed limit considering the influence of ambient temperature, or the first speed limit not considering the influence of ambient temperature; this embodiment of the disclosure does not limit this. The first column represents the second temperature difference (unit: °C), which is the difference between the actual temperature of the passenger compartment and the target temperature of the passenger compartment. In Table 2, the intersection of each pair of the first speed limit and the second temperature difference yields the speed correction value (unit: rpm).

[0136] For example, the first speed limit can be corrected by adding the speed correction value to the first speed limit. For instance, referring to Table 2, when the first speed limit is 3000 rpm and the second temperature difference is 5°C, the corresponding speed correction value is 1000 rpm. In this case, the corrected first speed limit is 4000 rpm.

[0137] It is understandable that, since the first speed limit can be corrected based on the first temperature difference of the battery to obtain the maximum speed limit, the process of determining the first speed limit can be mainly to meet the cooling and noise control requirements of the passenger cabin, and then balance the cooling requirements of the battery through the speed adjustment coefficient determined in S302.

[0138] S302, determine the speed adjustment coefficient based on the first temperature difference.

[0139] For example, the speed adjustment coefficient can be pre-established with a corresponding relationship to the first temperature difference. For instance, when the first temperature difference is -5℃, the speed adjustment coefficient is 0.9; when the first temperature difference is 0℃, the speed adjustment coefficient is 0; and when the first temperature difference is 5℃, the speed adjustment coefficient is 1.1.

[0140] In other words, the larger the first temperature difference, the larger the speed adjustment coefficient, so that the first speed limit after adjustment by the speed adjustment coefficient can meet the cooling requirements of the battery.

[0141] S303, based on the speed adjustment coefficient, adjusts the first speed limit to obtain the maximum speed limit.

[0142] In some embodiments, the maximum speed limit can be obtained by multiplying the speed adjustment coefficient by the first speed limit.

[0143] It is understandable that S301 to S303 above are actually a balancing consideration of the cooling requirements of the passenger compartment and the cooling requirements of the battery. That is, by obtaining a first speed limit that meets the cooling requirements of the passenger compartment, adjustments are made based on the speed adjustment coefficient to meet the cooling requirements of the battery.

[0144] For example, in hot weather, even if the passengers' cooling needs may have been met, the battery temperature may rise as the vehicle is driven. In order to ensure the safety of the battery, the first speed limit can be adjusted by the speed adjustment coefficient to appropriately increase the first speed limit, thereby obtaining the maximum speed limit that can meet the battery's cooling needs, achieving a balance between reducing compressor noise and ensuring battery safety.

[0145] Therefore, by calculating the maximum speed limit of the compressor, the present invention can effectively limit the noise generated by the compressor to a certain range. Furthermore, the present invention can further adjust the maximum speed limit according to different cooling needs, thereby reducing compressor noise while also ensuring the comfort of the vehicle interior temperature and the safety of the battery.

[0146] Based on the same inventive concept, this disclosure also provides a vehicle refrigeration system control device, as shown in the following embodiment. Since the principle by which this device embodiment solves the problem is similar to that of the above-described method embodiment, the implementation of this device embodiment can refer to the implementation of the above-described method embodiment, and repeated details will not be elaborated further.

[0147] Figure 5 This diagram illustrates the structure of a vehicle refrigeration system control device according to an embodiment of the present disclosure. The refrigeration system includes a compressor and a battery refrigeration circuit and a passenger compartment refrigeration circuit connected in parallel with the compressor. The battery refrigeration circuit includes a first expansion valve and a cooler. The cooler is used to cool the battery in the target vehicle, and the first expansion valve is used to control the cooling efficiency of the cooler. The passenger compartment refrigeration circuit includes a second expansion valve and a front evaporator. The front evaporator is used to cool the passenger compartment in the target vehicle, and the second expansion valve is used to control the cooling efficiency of the front evaporator.

[0148] Specifically, such as Figure 5 As shown, the vehicle refrigeration system control device 500 includes: an acquisition module 501, a first adjustment module 502, a determination module 503, and a second adjustment module 504.

[0149] The acquisition module 501 is used to acquire the actual battery temperature and the target battery temperature in the target vehicle.

[0150] The first adjustment module 502 is used to adjust the opening degree of the first expansion valve and the second expansion valve according to the actual temperature of the battery.

[0151] The determining module 503 is used to determine the maximum speed limit of the compressor based on a first temperature difference between the actual temperature of the battery and the target temperature of the battery.

[0152] The second adjustment module 504 is used to adjust the current speed to the maximum speed limit if the current speed of the compressor is greater than the maximum speed limit.

[0153] In some embodiments, the first adjustment module 502 is specifically used to increase the opening of the first expansion valve and decrease the opening of the second expansion valve when the actual battery temperature is greater than or equal to the battery temperature limit.

[0154] In some embodiments, the first adjustment module 502 is specifically used to reduce the opening of the first expansion valve and increase the opening of the second expansion valve when the actual battery temperature is less than the battery temperature limit.

[0155] In some embodiments, the opening adjustment amount of the first expansion valve and the second expansion valve is determined based on the first temperature difference.

[0156] In some embodiments, the determining module 503 is specifically used to: obtain a first speed limit of the compressor; determine a speed adjustment coefficient based on a first temperature difference; and adjust the first speed limit based on the speed adjustment coefficient to obtain a maximum speed limit.

[0157] In some embodiments, the determining module 503 is specifically used to: obtain the actual temperature of the passenger compartment of the target vehicle, the vehicle speed, and the air volume output through the front evaporator; determine the second speed limit of the compressor based on the actual temperature of the passenger compartment and the air volume; and adjust the second speed limit based on the vehicle speed to obtain the first speed limit.

[0158] In some embodiments, the determining module 503 is further configured to acquire the ambient temperature outside the vehicle; adjust the first speed limit based on the ambient temperature outside the vehicle to obtain a new first speed limit.

[0159] In some embodiments, the determining module 503 is further configured to: obtain a second temperature difference, the second temperature difference being the temperature difference between the actual temperature of the occupant cabin and the target temperature of the occupant cabin; determine a speed correction value for the first speed limit based on the second temperature difference; and correct the first speed limit based on the speed correction value.

[0160] Those skilled in the art will understand that various aspects of this disclosure can be implemented as a system, method, or program product. Therefore, various aspects of this disclosure can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software aspects, collectively referred to herein as a "circuit," "module," or "system."

[0161] The following reference Figure 6 To describe an electronic device 600 according to an embodiment of the present disclosure. Figure 6 The electronic device 600 shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.

[0162] like Figure 6 As shown, the electronic device 600 is manifested in the form of a general-purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one storage unit 620, and a bus 630 connecting different system components (including storage unit 620 and processing unit 610).

[0163] The storage unit stores program code, which can be executed by the processing unit 610, causing the processing unit 610 to perform the steps described in the "Exemplary Methods" section above according to various exemplary embodiments of this disclosure.

[0164] In some embodiments, the processing unit 610 may perform the following steps of the above method embodiment: obtaining the actual battery temperature and the target battery temperature in the target vehicle; adjusting the opening degree of the first expansion valve and the second expansion valve according to the actual battery temperature; determining the maximum speed limit of the compressor according to the first temperature difference between the actual battery temperature and the target battery temperature; if the current speed of the compressor is greater than the maximum speed limit, adjusting the current speed to the maximum speed limit.

[0165] Storage unit 620 may include a readable medium in the form of a volatile storage unit, such as random access memory (RAM) 6201 and / or cache memory 6202, and may further include a read-only memory (ROM) 6203.

[0166] Storage unit 620 may also include a program / utility 6204 having a set (at least one) program module 6205, such program module 6205 including but not limited to: operating system, one or more application programs, other program modules and program data, each or some combination of these examples may include an implementation of a network environment.

[0167] Bus 630 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0168] Electronic device 600 can also communicate with one or more external devices 640 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 600, and / or with any device that enables electronic device 600 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 650. Furthermore, electronic device 600 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 660. Figure 6 As shown, network adapter 660 communicates with other modules of electronic device 600 via bus 630. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0169] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, target server, terminal device, or network device, etc.) to execute the method according to the embodiments of this disclosure.

[0170] In exemplary embodiments of this disclosure, a computer-readable storage medium is also provided, which may be a readable signal medium or a readable storage medium. A program product capable of implementing the methods described above is stored thereon. In some possible implementations, various aspects of this disclosure may also be implemented as a program product including program code, which, when run on a terminal device, causes the terminal device to perform the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of this disclosure.

[0171] More specific examples of computer-readable storage media in this disclosure may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0172] In this disclosure, a computer-readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of transmitting, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or device.

[0173] Optionally, the program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0174] In practical implementation, program code for performing the operations of this disclosure can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or target server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet target service provider).

[0175] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0176] Furthermore, although the steps of the method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0177] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, target server, mobile terminal, or network device, etc.) to execute the method according to the embodiments of this disclosure.

[0178] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A method for controlling a vehicle refrigeration system, characterized in that, The refrigeration system includes a compressor and a battery refrigeration circuit and a crew cabin refrigeration circuit connected in parallel with the compressor. The battery cooling circuit includes a first expansion valve and a cooler, the cooler being used to cool the battery in the target vehicle, and the first expansion valve being used to control the cooling efficiency of the cooler. The passenger compartment cooling circuit includes a second expansion valve and a front evaporator. The front evaporator is used to cool the passenger compartment in the target vehicle, and the second expansion valve is used to control the cooling efficiency of the front evaporator. The method includes: Obtain the actual battery temperature and target battery temperature in the target vehicle; Adjust the opening degree of the first expansion valve and the second expansion valve according to the actual temperature of the battery; The maximum speed limit of the compressor is determined based on the first temperature difference between the actual temperature of the battery and the target temperature of the battery. If the current speed of the compressor is greater than the maximum speed limit, then the current speed is adjusted to the maximum speed limit.

2. The method according to claim 1, characterized in that, The step of adjusting the opening of the first expansion valve and the second expansion valve according to the actual temperature of the battery includes: If the actual battery temperature is greater than or equal to the battery temperature limit, increase the opening of the first expansion valve and decrease the opening of the second expansion valve.

3. The method according to claim 1, characterized in that, The step of adjusting the opening of the first expansion valve and the second expansion valve according to the actual temperature of the battery includes: If the actual battery temperature is lower than the battery temperature limit, reduce the opening of the first expansion valve and increase the opening of the second expansion valve.

4. The method according to claim 2 or 3, characterized in that, The opening adjustment amount of the first expansion valve and the second expansion valve is determined based on the first temperature difference.

5. The method according to claim 1, characterized in that, The step of determining the maximum speed limit of the compressor based on the first temperature difference between the actual temperature of the battery and the target temperature of the battery includes: Obtain the first speed limit value of the compressor; Determine the speed adjustment coefficient based on the first temperature difference; Based on the speed adjustment coefficient, the first speed limit is adjusted to obtain the maximum speed limit.

6. The method according to claim 5, characterized in that, The step of obtaining the second speed limit value of the compressor includes: The actual temperature of the passenger compartment, the vehicle speed, and the air volume output through the front evaporator of the target vehicle are obtained. The second speed limit of the compressor is determined based on the actual temperature of the passenger compartment and the air volume. The second speed limit is adjusted according to the vehicle speed to obtain the first speed limit.

7. The method according to claim 6, characterized in that, The method further includes: Obtain the ambient temperature outside the vehicle; The first speed limit is adjusted according to the ambient temperature outside the vehicle to obtain a new first speed limit.

8. The method according to claim 6 or 7, characterized in that, The method further includes: A second temperature difference is obtained, which is the temperature difference between the actual temperature of the crew cabin and the target temperature of the crew cabin. Based on the second temperature difference, determine the speed correction value for the first speed limit; Based on the aforementioned speed correction value, the first speed limit is corrected.

9. A vehicle refrigeration system control device, characterized in that, The refrigeration system includes a compressor and a battery refrigeration circuit and a crew cabin refrigeration circuit connected in parallel with the compressor. The battery cooling circuit includes a first expansion valve and a cooler, the cooler being used to cool the battery in the target vehicle, and the first expansion valve being used to control the cooling efficiency of the cooler. The passenger compartment cooling circuit includes a second expansion valve and a front evaporator. The front evaporator is used to cool the passenger compartment in the target vehicle, and the second expansion valve is used to control the cooling efficiency of the front evaporator. The device includes: The acquisition module is used to acquire the actual battery temperature and the target battery temperature in the target vehicle; The first adjustment module is used to adjust the opening degree of the first expansion valve and the second expansion valve according to the actual temperature of the battery; The determining module is used to determine the maximum speed limit of the compressor based on a first temperature difference between the actual temperature of the battery and the target temperature of the battery; The second adjustment module is used to adjust the current speed of the compressor to the maximum speed limit if the current speed of the compressor is greater than the maximum speed limit.

10. An electronic device, characterized in that, include: processor; as well as Memory for storing the executable instructions of the processor; The processor is configured to execute the method of any one of claims 1 to 8 by executing the executable instructions.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1 to 8.

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