Refrigeration control method and device and engineering machinery

Abstract

The invention relates to a refrigeration control method and device and engineering machinery, and relates to the technical field of engineering machinery, and the refrigeration control method comprises the following steps: receiving a refrigeration instruction; if the refrigeration instruction represents that both the cab and the battery need refrigeration, obtaining a first temperature difference and a second temperature difference; outputting a priority demand instruction according to the first temperature difference and the second temperature difference; and the opening degree of the first electronic expansion valve and the opening degree of the second electronic expansion valve are adjusted according to the priority demand instruction. According to the refrigeration control method and device and the engineering machinery provided by the embodiment of the invention, under the condition that both the cab and the battery have refrigeration requirements, the refrigeration priorities of the cab and the battery are effectively determined, and the opening degrees of the electronic expansion valves corresponding to the cab and the battery are reasonably controlled; therefore, the refrigerating capacity distribution of the cab and the battery is more reasonable.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a refrigeration control method, device and engineering machinery. Background Art

[0002] At present, for electric vehicles, there are working conditions where both the cab and the battery need to be cooled. In the related art, when both the cab and the battery need to be cooled, it is difficult to determine the cooling demand priority of the cab and the battery, which easily leads to unreasonable opening of the electronic expansion valves corresponding to the cab and the battery, and then leads to unreasonable distribution of cooling capacity for the cab and the battery. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the embodiments of the present application provide a refrigeration control method, device and engineering machinery, which, when both the cab and the battery have cooling needs, effectively determine the cooling priority of the cab and the battery, and reasonably control the opening of the electronic expansion valves corresponding to the cab and the battery, thereby making the cooling capacity distribution of the cab and the battery more reasonable.

[0004] In a first aspect, a refrigeration control method is provided, comprising:

[0005] receiving cooling instructions;

[0006] If the cooling instruction indicates that both the cab and the battery need to be cooled, a first temperature difference and a second temperature difference are obtained; wherein the first temperature difference indicates the temperature difference between the actual temperature in the cab and the first target temperature; and the second temperature difference indicates the temperature difference between the water inlet temperature in the battery and the second target temperature;

[0007] Outputting a priority demand instruction according to the first temperature difference and the second temperature difference; wherein the priority demand instruction includes that the cooling priority of the battery is higher than the cooling priority of the cab, or the cooling priority of the cab is not lower than the cooling priority of the battery;

[0008] According to the priority demand instruction, the openings of the first electronic expansion valve and the second electronic expansion valve are adjusted; wherein the first electronic expansion valve is used to adjust the flow rate of the fluid flowing to the cab; and the second electronic expansion valve is used to adjust the flow rate of the fluid flowing to the battery.

[0009] According to a first aspect of the present application, outputting a priority demand instruction according to the first temperature difference and the second temperature difference includes:

[0010] If the difference between the second temperature difference and the first temperature difference is greater than a preset threshold, outputting a priority demand instruction indicating that the cooling priority of the battery is higher than the cooling priority of the cab;

[0011] If the difference between the second temperature difference and the first temperature difference is less than or equal to the preset threshold, a priority demand instruction is outputted, indicating that the cooling priority of the cab is not lower than the cooling priority of the battery.

[0012] According to the first aspect of the present application, adjusting the openings of the first electronic expansion valve and the second electronic expansion valve according to the priority demand instruction includes:

[0013] According to the priority demand instruction, a cab target overheat degree and a battery target overheat degree are obtained;

[0014] Acquiring a first actual overheat degree of the cab and a second actual overheat degree of the battery;

[0015] adjusting the opening of the first electronic expansion valve according to the target superheat of the cab and the first actual superheat;

[0016] The opening degree of the second electronic expansion valve is adjusted according to the battery target superheat and the second actual superheat.

[0017] According to the first aspect of the present application, obtaining the target overheat of the cab and the target overheat of the battery according to the priority demand instruction includes:

[0018] If the priority demand instruction indicates that the cooling priority of the cab is not lower than the cooling priority of the battery, the battery target overheat is set equal to the sum of the cab target overheat, the second temperature difference and a preset modification factor.

[0019] According to the first aspect of the present application, obtaining the battery target overheat and the cab target overheat according to the priority demand instruction includes:

[0020] If the priority demand instruction indicates that the cooling priority of the battery is higher than the cooling priority of the cab, the target overheat degree of the cab is set equal to the sum of the target overheat degree of the battery, the first temperature difference and a preset correction factor.

[0021] According to the first aspect of the present application, adjusting the opening of the first electronic expansion valve according to the target superheat of the cab and the first actual superheat includes:

[0022] If the first actual superheat is greater than the target superheat of the cab, increasing the opening of the first electronic expansion valve;

[0023] If the first actual superheat is less than or equal to the target superheat of the cab, the opening of the first electronic expansion valve is reduced.

[0024] According to the first aspect of the present application, adjusting the opening of the second electronic expansion valve according to the battery target superheat and the second actual superheat includes:

[0025] If the second actual superheat is greater than the battery target superheat, increasing the opening of the second electronic expansion valve;

[0026] If the second actual superheat is less than or equal to the battery target superheat, the opening of the second electronic expansion valve is reduced.

[0027] According to the first aspect of the present application, after obtaining the first temperature difference and the second temperature difference, the refrigeration control method further includes:

[0028] Obtaining a first rotation speed of the compressor according to the actual temperature in the cab and the first target temperature;

[0029] obtaining a second rotation speed of the compressor according to the water inlet temperature in the battery and the second target temperature;

[0030] The actual rotation speed of the compressor is adjusted to be the sum of the first rotation speed and the second rotation speed.

[0031] In a second aspect, a refrigeration control device is also provided, comprising:

[0032] A first receiving module, used for receiving a cooling instruction;

[0033] A first acquisition module is used to acquire a first temperature difference and a second temperature difference if the cooling instruction indicates that both the cab and the battery need to be cooled; wherein the first temperature difference represents the temperature difference between the actual temperature in the cab and the first target temperature; and the second temperature difference represents the temperature difference between the water inlet temperature in the battery and the second target temperature;

[0034] A first output module, configured to output a priority demand instruction according to the first temperature difference and the second temperature difference; wherein the priority demand instruction includes that the cooling priority of the battery is higher than the cooling priority of the cab, or that the cooling priority of the cab is not lower than the cooling priority of the battery;

[0035] The first adjustment module is used to adjust the opening of the first electronic expansion valve and the second electronic expansion valve according to the priority demand instruction; wherein the first electronic expansion valve is used to adjust the flow rate of the fluid flowing to the cab; the second electronic expansion valve is used to adjust the flow rate of the fluid flowing to the battery.

[0036] In a third aspect, there is also provided an engineering machine, comprising:

[0037] The body, which has a cab and batteries;

[0038] a first electronic expansion valve, used for adjusting the flow rate of the fluid flowing to the cab;

[0039] a second electronic expansion valve, for adjusting the flow rate of the fluid flowing to the battery;

[0040] The refrigeration control device as described in the previous embodiment is communicatively connected to the first electronic expansion valve and the second electronic expansion valve.

[0041] In a fourth aspect, an electronic device is also provided, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is used to execute the refrigeration control method described in the above embodiment.

[0042] In a fifth aspect, a computer-readable storage medium is also provided, wherein the storage medium stores a computer program, and the computer program is used to execute the refrigeration control method described in the above embodiment.

[0043] The refrigeration control method, device and engineering machinery provided in the embodiments of the present application, on the first hand, can determine the degree of refrigeration demand for the cab and the battery through the first temperature difference and the second temperature difference, and effectively determine the refrigeration priority of the cab and the battery; on the second hand, after determining the refrigeration priority of the cab and the battery, according to the priority demand instruction, the opening of the first electronic expansion valve and the second electronic expansion valve are reasonably adjusted, so as to reasonably control the fluid flow to the cab and the fluid flow to the battery, so that the distribution result of the first electronic valve and the second electronic valve for the fluid flow can meet the priority demand instruction, thereby ensuring that the refrigeration capacity distribution of the cab and the battery is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0045] Figure 1 A schematic flow chart of a refrigeration control method provided by an exemplary embodiment of the present application.

[0046] Figure 2 A schematic diagram of a flow chart of outputting a priority demand instruction according to a first temperature difference and a second temperature difference provided in an exemplary embodiment of the present application.

[0047] Figure 3 A schematic diagram of a flow chart of adjusting the opening degrees of a first electronic expansion valve and a second electronic expansion valve according to a priority demand instruction provided in an exemplary embodiment of the present application.

[0048] Figure 4 A schematic diagram of a flow chart for obtaining a target cab overheat and a target battery overheat according to a priority demand instruction provided in an exemplary embodiment of the present application.

[0049] Figure 5 A relationship diagram between a target superheat degree of a cab and a first temperature difference is provided for an exemplary embodiment of the present application.

[0050] Figure 6 A relationship diagram between a battery target superheat and a second temperature difference is provided for an exemplary embodiment of the present application.

[0051] Figure 7 A schematic diagram of a flow chart for adjusting the opening degree of a first electronic expansion valve according to a target superheat degree of a cab and a first actual superheat degree provided for an exemplary embodiment of the present application.

[0052] Figure 8 An exemplary embodiment of the present application provides a flow chart of adjusting the opening of a second electronic expansion valve according to a target superheat degree of a battery and a second actual superheat degree.

[0053] Fig. 9 A schematic flow chart of a refrigeration control method provided by another exemplary embodiment of the present application.

[0054] Fig.10 A structural block diagram of a refrigeration control device provided by an exemplary embodiment of the present application.

[0055] Fig.11 A structural block diagram of a refrigeration control device provided in another exemplary embodiment of the present application.

[0056] Fig.12 A structural block diagram of an engineering machinery provided as an exemplary embodiment of the present application.

[0057] Fig.13 A structural block diagram of an electronic device provided for an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0058] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0059] Figure 1 A schematic flow chart of a refrigeration control method provided by an exemplary embodiment of the present application.

[0060] like Figure 1 As shown, the refrigeration control method provided in the embodiment of the present application may include:

[0061] S210: receiving a cooling instruction.

[0062] In one embodiment, the cooling instruction may indicate that both the cabin and the battery need to be cooled.

[0063] In one embodiment, the cooling instruction may indicate that only the cabin needs to be cooled.

[0064] In one embodiment, the cooling instruction may indicate that only the battery needs to be cooled.

[0065] S220: If the cooling instruction indicates that both the cab and the battery need to be cooled, a first temperature difference and a second temperature difference are obtained.

[0066] Specifically, the first temperature difference can be understood as the temperature difference between the actual temperature in the cab and the first target temperature. The second temperature difference can be understood as the temperature difference between the water inlet temperature in the battery and the second target temperature.

[0067] It should be noted that the first target temperature can be understood as the temperature that the cab needs to reach after the cab is cooled. The second target temperature can be understood as the temperature that the water inlet temperature of the battery needs to reach after the battery is cooled.

[0068] It should be noted that the first target temperature and the second target temperature can be determined according to actual cooling requirements.

[0069] In one embodiment, the actual temperature in the cab may be detected by a temperature sensor, and the first temperature difference may be calculated in combination with the first target temperature.

[0070] In one embodiment, the inlet water temperature in the battery may be detected by a temperature sensor, and the second temperature difference may be calculated in combination with the second target temperature.

[0071] S230: Outputting a priority demand instruction according to the first temperature difference and the second temperature difference.

[0072] It should be noted that the priority demand instruction may include a demand instruction that the cooling priority of the battery is higher than the cooling priority of the cab, or a demand instruction that the cooling priority of the cab is not lower than the cooling priority of the battery.

[0073] Specifically, the first temperature difference can be used to determine the difference between the actual temperature of the cab and the first target temperature, thereby determining the degree of cooling demand of the cab; the second temperature difference can be used to determine the difference between the water inlet temperature of the battery and the second target temperature, thereby determining the degree of cooling demand of the battery. The first temperature difference and the second temperature difference can be used to determine which has a higher cooling priority, the battery or the cab, and output a corresponding priority demand instruction.

[0074] S240: Adjusting the openings of the first electronic expansion valve and the second electronic expansion valve according to the priority demand instruction.

[0075] It should be noted that the first electronic valve can be used to adjust the flow rate of the fluid (such as refrigerant) flowing to the cab, and the second electronic valve can be used to adjust the flow rate of the fluid (such as refrigerant) flowing to the battery.

[0076] Specifically, after determining the priority of the cooling demand of the cab and the battery, the opening of the first electronic expansion valve and the second electronic expansion valve can be adjusted respectively according to the priority demand instruction, so as to reasonably control the fluid flow to the cab and the fluid flow to the battery, so that the distribution result of the fluid flow by the first electronic valve and the second electronic valve can meet the priority demand instruction, thereby ensuring that the cooling capacity distribution of the cab and the battery is more reasonable.

[0077] The refrigeration control method provided in the embodiment of the present application, on the first hand, can determine the degree of refrigeration demand for the cab and the battery through the first temperature difference and the second temperature difference, and effectively determine the refrigeration priority of the cab and the battery; on the second hand, after determining the refrigeration priority of the cab and the battery, according to the priority demand instruction, the opening of the first electronic expansion valve and the second electronic expansion valve are reasonably adjusted, so as to reasonably control the fluid flow to the cab and the fluid flow to the battery, so that the distribution result of the fluid flow by the first electronic valve and the second electronic valve can meet the priority demand instruction, thereby ensuring that the refrigeration capacity distribution of the cab and the battery is more reasonable.

[0078] Figure 2 A flow chart of outputting a priority demand instruction according to a first temperature difference and a second temperature difference is provided as an exemplary embodiment of the present application. Figure 2 As shown, step S230 may include:

[0079] S231: If the difference between the second temperature difference and the first temperature difference is greater than a preset threshold, output a priority demand instruction indicating that the cooling priority of the battery is higher than the cooling priority of the cab.

[0080] Specifically, the difference between the second temperature difference and the first temperature difference is greater than the preset threshold value, which can be equivalent to the following relational expression 1:

[0081] ΔT2-ΔT1>μ;

[0082] Among them, ΔT2 represents the second temperature difference; ΔT1 represents the first temperature difference; and μ represents the preset threshold value.

[0083] If the difference between the second temperature difference and the first temperature difference is greater than the preset threshold, it can be considered that the current battery water inlet temperature exceeds the second target temperature to a greater extent than the actual temperature of the cab exceeds the first target temperature. It can also be considered that the current cooling demand of the battery exceeds the current cooling demand of the cab. For this reason, a priority demand instruction can be output, indicating that the cooling priority of the battery is higher than the cooling priority of the cab.

[0084] S232: If the difference between the second temperature difference and the first temperature difference is less than or equal to a preset threshold, output a priority demand instruction indicating that the cooling priority of the cab is not lower than the cooling priority of the battery.

[0085] Specifically, the difference between the second temperature difference and the first temperature difference is less than or equal to the preset threshold value, which can be equivalent to the following relational expression 2:

[0086] ΔT2-ΔT1≤μ;

[0087] Among them, ΔT2 represents the second temperature difference; ΔT1 represents the first temperature difference; and μ represents the preset threshold value.

[0088] If the difference between the second temperature difference and the first temperature difference is less than or equal to the preset threshold, it can be considered that the degree to which the actual temperature of the cab exceeds the first target temperature is greater than the degree to which the current water inlet temperature of the battery exceeds the second target temperature, or that the degree to which the actual temperature of the cab exceeds the first target temperature is equivalent to the degree to which the current water inlet temperature of the battery exceeds the second target temperature; it can also be considered that the current cooling requirement of the cab exceeds the current cooling requirement of the battery, or that the current cooling requirement of the cab is equivalent to the current cooling requirement of the battery; for this purpose, a priority requirement instruction can be output that indicates that the cooling priority of the cab is not lower than the cooling priority of the battery.

[0089] It should be noted that if the preset threshold is set to a larger value, the comfort in the cab can be improved as soon as possible (the cab can be cooled as soon as possible) while ensuring the safety of the battery (the battery is cooled first); if the preset threshold is set to a smaller value, the battery and both sides of the cab can be cooled more evenly. Therefore, the preset threshold can be set according to actual conditions, and the present application embodiment does not specifically limit the preset threshold.

[0090] Figure 3 A flow chart of adjusting the opening of the first electronic expansion valve and the second electronic expansion valve according to a priority demand instruction provided by an exemplary embodiment of the present application. Figure 3 As shown, step S240 includes:

[0091] S241: Obtaining a cab target overheat degree and a battery target overheat degree according to the priority demand instruction.

[0092] S242: Obtain a first actual overheat degree of the cab and a second actual overheat degree of the battery.

[0093] Specifically, the target superheat of the cab refers to the ideal difference between the superheat temperature and the saturation temperature of the refrigerant flowing to the cab at the same evaporation pressure, and the first actual superheat of the cab refers to the actual difference between the superheat temperature and the saturation temperature of the refrigerant flowing to the cab at the same evaporation pressure.

[0094] Similarly, the battery target superheat refers to the ideal difference between the superheat temperature and the saturation temperature of the refrigerant flowing to the battery at the same evaporation pressure, and the second actual superheat of the battery refers to the actual difference between the superheat temperature and the saturation temperature of the refrigerant flowing to the battery at the same evaporation pressure.

[0095] It should be noted that the priority relationship represented by the priority demand instruction can be reflected by the relationship between the cab target overheat and the battery target overheat. After determining one of the cab target overheat and the battery target overheat, the value of the other can be determined according to the corresponding relationship between the two. This will be described in detail later.

[0096] In the process of executing step S242, taking the first actual superheat of the cab as an example, the actual temperature and evaporation pressure of the refrigerant flowing to the cab can be detected. There is a one-to-one correspondence between the evaporation pressure and the saturation temperature. The saturation temperature of the refrigerant under the evaporation pressure can be obtained according to the evaporation pressure, and the difference between the actual temperature and the saturation temperature can be calculated to obtain the first actual superheat of the cab. Similarly, the second actual superheat of the battery can be calculated through the above process.

[0097] S243: Adjusting the opening of the first electronic expansion valve according to the target superheat degree of the cab and the first actual superheat degree.

[0098] S244: Adjusting the opening of the second electronic expansion valve according to the target superheat of the battery and the second actual superheat.

[0099] By executing step S243 and step S244, the opening of the first electronic expansion valve and the second electronic expansion valve can be adjusted through PID feedback control, so that the first actual superheat degree gradually tends to the target superheat degree of the cab, and the second actual superheat degree gradually tends to the target superheat degree of the battery.

[0100] It should be noted that the specific process of PID feedback control is well documented in the relevant technologies and will not be described in detail here.

[0101] It should be noted that, before using PID feedback control, the initial opening of the first electronic expansion valve can be obtained first, and the first duration of the first electronic expansion valve at the initial opening can be obtained. If the first duration is greater than the first preset duration threshold, it can be considered that the first electronic expansion valve is in an open working state, and then step S243 is executed to adjust the opening of the first electronic expansion valve by using PID feedback control. Similarly, before using PID feedback control, the initial opening of the second electronic expansion valve can be obtained first, and the second duration of the second electronic expansion valve at the initial opening can be obtained. If the second duration is greater than the second preset duration threshold, it can be considered that the second electronic expansion valve is in an open working state, and then step S244 is executed to adjust the opening of the second electronic expansion valve by using PID feedback control.

[0102] It should be noted that, in actual applications, after executing step S210, if the cooling instruction indicates that only the cab needs to be cooled, then the target superheat degree of the cab can be obtained (see the following description). Figure 5 ) and the first actual superheat, the opening of the first electronic expansion valve is directly adjusted. Similarly, if the cooling instruction indicates that only the battery needs to be cooled, then the target superheat of the battery can be obtained (refer to the following description Figure 6 ) and the second actual superheat, directly adjust the opening of the second electronic expansion valve.

[0103] Figure 4 A schematic diagram of a process for obtaining a target overheating degree of a cab and a target overheating degree of a battery according to a priority demand instruction provided in an exemplary embodiment of the present application. Figure 4 As shown, step S241 may include:

[0104] S2411: If the priority demand instruction indicates that the cooling priority of the cab is not lower than the cooling priority of the battery, the battery target overheat is set equal to the sum of the cab target overheat, the second temperature difference and the preset modification factor.

[0105] Specifically, if the priority demand instruction indicates that the cooling priority of the cab is not lower than the cooling priority of the battery, the battery target overheat, the cab target overheat, the second temperature difference and the preset modification factor satisfy the following relationship three:

[0106] T cab =T1;

[0107] T Batt =T Cab +β+γ;

[0108] Among them, T cab Characterizes the target superheat of the cab; T Batt represents the target overheat of the battery; β represents the second temperature difference; γ represents the preset modification factor.

[0109] Figure 5 A relationship diagram between a target superheat degree of a cab and a first temperature difference is provided for an exemplary embodiment of the present application. Figure 5 The figure shows the proportional relationship between T1 and the first temperature difference when the cooling priority of the cab is not lower than that of the battery. The T1 value can be determined based on the first temperature difference, and then the battery target overheating degree T can be obtained based on the above equation 3. Batt .

[0110] It should be noted that Figure 5 Only one relationship between the target superheat degree of the cab and the first temperature difference is shown as an example. In actual applications, the target superheat degree of the cab and the first temperature difference may also be other functional relationships.

[0111] It should be noted that in relational expression 3, the target overheat of the cab is less than the target overheat of the battery. This makes it easier to increase the opening of the first electronic expansion valve in priority to meet the cooling demand of the cab first, and then meet the cooling demand of the battery.

[0112] It should be noted that during the battery cooling process, the second temperature difference will gradually decrease, the battery target overheat value will also change dynamically, and the battery target overheat will gradually approach the cab target overheat, thereby ensuring that the cooling capacity of the cab and the battery is more evenly distributed.

[0113] It should be noted that the preset modification factor γ can ensure that when the second temperature difference is zero, the target overheat of the cab is still lower than the target overheat of the battery, and the opening of the first electronic expansion valve can still be increased to give priority to meeting the cooling demand of the cab.

[0114] It should be understood that the preset modification factor γ can be set according to actual conditions, and the present application does not specifically limit the preset modification factor γ.

[0115] like Figure 4 As shown, step S241 may also include:

[0116] S2412: If the priority demand instruction indicates that the cooling priority of the battery is higher than the cooling priority of the cab, the target overheat of the cab is set equal to the sum of the target overheat of the battery, the first temperature difference and the preset correction factor.

[0117] It should be noted that step S2412 and step S2411 are in parallel relationship and do not need to be executed simultaneously in the same execution cycle.

[0118] Specifically, if the priority demand instruction indicates that the cooling priority of the battery is higher than the cooling priority of the cab, the cab target overheat, the battery target overheat, the first temperature difference and the preset correction factor satisfy the following relationship 4:

[0119] T Batt =T0;

[0120] T Cab =T Batt +α+γ;

[0121] Among them, T Batt Characterizes the battery target overheat; T cab represents the target superheat of the cab; α represents the first temperature difference; γ represents the preset modification factor.

[0122] Figure 6 A relationship diagram between a battery target superheat and a second temperature difference is provided for an exemplary embodiment of the present application. Figure 6 The figure shows the proportional relationship between T0 and the second temperature difference when the cooling priority of the battery is higher than that of the cab. The T0 value can be determined based on the second temperature difference, and then the cab target overheating degree T can be obtained based on the above-mentioned equation 4. cab .

[0123] It should be noted that Figure 6 Only one relationship between the target battery overheat and the second temperature difference is shown as an example. In actual applications, the target battery overheat and the second temperature difference may also be other functional relationships.

[0124] It should be noted that in relational expression 4, the target overheat of the cab is less than the target overheat of the battery. This makes it easier to increase the opening of the second electronic expansion valve in priority to meet the cooling demand of the battery first, and then meet the cooling demand of the cab.

[0125] It should be noted that in the process of cooling the cab, the first temperature difference will gradually decrease, the value of the cab target overheat will dynamically change, and the cab target overheat will gradually approach the battery target overheat, thereby ensuring that the cooling capacity of the cab and the battery is more evenly distributed.

[0126] It should be noted that the preset modification factor γ can ensure that when the first temperature difference is zero, the battery target overheat is still lower than the cab target overheat, and the opening of the second electronic expansion valve can still be increased to give priority to meeting the battery cooling demand.

[0127] Figure 7 A schematic diagram of a flow chart of adjusting the opening of the first electronic expansion valve according to the target superheat of the cab and the first actual superheat provided by an exemplary embodiment of the present application. Figure 7 As shown, step S243 may include:

[0128] S2431: If the first actual superheat is greater than the target superheat of the cab, increase the opening of the first electronic expansion valve.

[0129] S2432: If the first actual superheat is less than or equal to the target superheat of the cab, reduce the opening of the first electronic expansion valve.

[0130] Specifically, if the first actual superheat is greater than the target superheat of the cab, the flow rate of the refrigerant can be increased by increasing the opening of the first electronic expansion valve. The refrigerant after the increase in flow rate can absorb more heat, which is beneficial to reduce the first actual superheat. The first actual superheat gradually approaches the target superheat of the cab, and the actual temperature in the cab can be accurately controlled to improve the cooling efficiency.

[0131] Similarly, if the first actual superheat is less than or equal to the target superheat of the cab, the flow rate of the refrigerant can be reduced by reducing the opening of the first electronic expansion valve. The refrigerant absorbs less heat after the flow rate is reduced, which is beneficial to increasing the first actual superheat. The first actual superheat gradually approaches the target superheat of the cab, and the actual temperature in the cab can be accurately controlled to improve the cooling efficiency.

[0132] Figure 8 An exemplary embodiment of the present application provides a flow chart of adjusting the opening of the second electronic expansion valve according to the target superheat of the battery and the second actual superheat. Figure 8 As shown, step S244 may include:

[0133] S2441: If the second actual superheat is greater than the battery target superheat, increase the opening of the second electronic expansion valve.

[0134] Similar to the execution process of step S2431, if the second actual superheat is greater than the battery target superheat, the refrigerant flow rate can be increased by increasing the opening of the second electronic expansion valve. The refrigerant after the increase in flow rate can absorb more heat, which is beneficial to reduce the second actual superheat. The second actual superheat gradually approaches the battery target superheat, which can accurately control the actual temperature inside the battery and improve the cooling efficiency.

[0135] S2442: If the second actual superheat is less than or equal to the battery target superheat, reduce the opening of the second electronic expansion valve.

[0136] Similar to the execution process of step S2432, if the second actual superheat is less than or equal to the battery target superheat, the refrigerant flow rate can be reduced by reducing the opening of the second electronic expansion valve. The refrigerant absorbs less heat after the flow rate is reduced, which is beneficial to increase the second actual superheat. The second actual superheat gradually approaches the battery target superheat, which can accurately control the actual temperature inside the battery and improve the cooling efficiency.

[0137] Fig. 9 FIG. 1 is a flow chart of a refrigeration control method provided by another exemplary embodiment of the present application. Fig. 9 As shown, after step S220, the refrigeration control method further includes:

[0138] S250: Obtaining a first rotation speed of the compressor according to the actual temperature in the cab and the first target temperature.

[0139] S260: Obtaining a second rotation speed of the compressor according to the water inlet temperature in the battery and the second target temperature.

[0140] S270: Adjust the actual speed of the compressor to the sum of the first speed and the second speed.

[0141] Specifically, during the execution of step S250 and step S260, the corresponding first speed and second speed can be output according to the two PID control systems. Then, step S270 is executed. Since the refrigerant output by the compressor needs to cool both the battery and the cab, the actual speed of the compressor is adjusted to the sum of the first speed and the second speed, so that the various parameters (such as pressure, temperature, etc.) of the refrigerant that the compressor can output can meet the requirements of cooling both the battery and the cab at the same time.

[0142] It should be noted that before executing step S250 and step S260, the initial speed of the compressor can be obtained first, and the third time duration that the compressor runs at the initial speed can be obtained. If the third time duration is greater than the third preset time duration threshold, it can be considered that the compressor is in an open working state, and then steps S250, S260 and S270 are executed to adjust the actual speed of the compressor.

[0143] In actual application, after executing step S210, if the cooling instruction indicates that only the cab needs cooling, then step S250 can be executed to adjust the actual speed of the compressor to the first speed. Similarly, if the cooling instruction indicates that only the battery needs cooling, then step S260 can be executed to adjust the actual speed of the compressor to the second speed.

[0144] Fig.10 This is a structural block diagram of a refrigeration control device provided by an exemplary embodiment of the present application. Fig.10As shown, the refrigeration control device 400 provided in the embodiment of the present application may include: a first receiving module 410, used to receive a refrigeration instruction; a first acquisition module 420, used to obtain a first temperature difference and a second temperature difference if the refrigeration instruction indicates that both the cab and the battery need to be refrigerated; wherein the first temperature difference represents the temperature difference between the actual temperature in the cab and the first target temperature; the second temperature difference represents the temperature difference between the water inlet temperature in the battery and the second target temperature; a first output module 430, used to output a priority demand instruction according to the first temperature difference and the second temperature difference; wherein the priority demand instruction includes that the refrigeration priority of the battery is higher than the refrigeration priority of the cab, or the refrigeration priority of the cab is not lower than the refrigeration priority of the battery; a first adjustment module 440, used to adjust the opening of the first electronic expansion valve and the second electronic expansion valve according to the priority demand instruction; wherein the first electronic expansion valve is used to adjust the flow rate of the fluid flowing to the cab; the second electronic expansion valve is used to adjust the flow rate of the fluid flowing to the battery.

[0145] The refrigeration control device provided in the embodiment of the present application, on the first hand, can determine the degree of refrigeration demand of the cab and the battery through the first temperature difference and the second temperature difference, and effectively determine the refrigeration priority of the cab and the battery; on the second hand, after determining the refrigeration priority of the cab and the battery, according to the priority demand instruction, the opening of the first electronic expansion valve and the second electronic expansion valve are reasonably adjusted, so as to reasonably control the fluid flow to the cab and the fluid flow to the battery, so that the distribution result of the fluid flow by the first electronic valve and the second electronic valve can meet the priority demand instruction, thereby ensuring that the refrigeration capacity distribution of the cab and the battery is more reasonable.

[0146] Fig.11 This is a structural block diagram of a refrigeration control device provided by another exemplary embodiment of the present application. Fig.11 As shown, in one embodiment, the first output module 430 includes a second output module 431, which is used to output a priority demand instruction indicating that the cooling priority of the battery is higher than the cooling priority of the cab if the difference between the second temperature difference and the first temperature difference is greater than a preset threshold value; and a third output module 432, which is used to output a priority demand instruction indicating that the cooling priority of the cab is not lower than the cooling priority of the battery if the difference between the second temperature difference and the first temperature difference is less than or equal to the preset threshold value.

[0147] like Fig.11As shown, in one embodiment, the first adjustment module 440 includes a second acquisition module 441, which is used to obtain the target superheat of the cab and the target superheat of the battery according to the priority demand instruction; a third acquisition module 442, which is used to obtain the first actual superheat of the cab and the second actual superheat of the battery; the second adjustment module 443, which is used to adjust the opening of the first electronic expansion valve according to the target superheat of the cab and the first actual superheat; the third adjustment module 444, which is used to adjust the opening of the second electronic expansion valve according to the target superheat of the battery and the second actual superheat.

[0148] like Fig.11 As shown, in one embodiment, the second acquisition module 441 includes a first calculation module 4411, which is used to set the battery target overheat equal to the sum of the cab target overheat, the second temperature difference and the preset modification factor if the priority demand instruction indicates that the cooling priority of the cab is not lower than the cooling priority of the battery.

[0149] like Fig.11 As shown, in one embodiment, the second acquisition module 441 includes a second calculation module 4412, which is used to set the target overheat of the cab to be equal to the sum of the target overheat of the battery, the first temperature difference and the preset correction factor if the priority demand instruction indicates that the cooling priority of the battery is higher than the cooling priority of the cab.

[0150] like Fig.11 As shown, in one embodiment, the second adjustment module 443 includes a fourth adjustment module 4431, which is used to increase the opening of the first electronic expansion valve if the first actual superheat is greater than the target superheat of the cab; and a fifth adjustment module 4432, which is used to reduce the opening of the first electronic expansion valve if the first actual superheat is less than or equal to the target superheat of the cab.

[0151] like Fig.11 As shown, in one embodiment, the third adjustment module 444 includes a sixth adjustment module 4441, which is used to increase the opening of the second electronic expansion valve if the second actual superheat is greater than the battery target superheat; and a seventh adjustment module 4442, which is used to reduce the opening of the second electronic expansion valve if the second actual superheat is less than or equal to the battery target superheat.

[0152] like Fig.11 As shown, in one embodiment, the refrigeration control device 400 may include a fourth acquisition module 450, which is used to obtain a first speed of the compressor based on the actual temperature in the cab and the first target temperature; a fifth acquisition module 460, which is used to obtain a second speed of the compressor based on the water inlet temperature in the battery and the second target temperature; and an eighth adjustment module 470, which is used to adjust the actual speed of the compressor to the sum of the first speed and the second speed.

[0153] Fig.12This is a structural block diagram of an engineering machine provided by an exemplary embodiment of the present application. Fig.12 As shown, the engineering machinery 600 provided in the embodiment of the present application may include a body 610, a first electronic expansion valve 620, a second electronic expansion valve 630 and a refrigeration control device 400 as described in the previous embodiment, the body 610 is provided with a cab and a battery, the first electronic expansion valve 620 is used to adjust the flow rate of the fluid flowing to the cab, the second electronic expansion valve 630 is used to adjust the flow rate of the fluid flowing to the battery, and the refrigeration control device 400 is communicatively connected to the first electronic expansion valve 620 and the second electronic expansion valve 630.

[0154] The engineering machinery 600 provided in the embodiment of the present application includes the refrigeration control device 400 as described in the previous embodiment, and has all the functions and beneficial effects of the refrigeration control device 400.

[0155] In one embodiment, the construction machine 600 may include a crane, an excavator, etc.

[0156] Fig.13 This is a structural block diagram of an electronic device provided by an exemplary embodiment of the present application. Fig.13 As shown, the electronic device 800 provided in the embodiment of the present application may include a processor 810; and a memory 820 for storing executable instructions of the processor 810; wherein the processor 810 is used to execute the refrigeration control method described in the above embodiment.

[0157] The processor 810 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 800 to perform desired functions.

[0158] The memory 820 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 810 may run the program instructions to implement the control method of each embodiment of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0159] In one example, the electronic device 800 may further include: an input device 830 and an output device 840 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0160] When the electronic device 800 is a stand-alone device, the input device 830 may be a communication network connector for receiving collected input signals from the first device and the second device.

[0161] In addition, the input device 830 may also include, for example, a keyboard, a mouse, and the like.

[0162] The output device 840 can output various information to the outside, including the determined distance information, direction information, etc. The output device 840 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0163] Of course, to simplify, Fig.13 Only some of the components related to the present application in the electronic device 800 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 800 may also include any other appropriate components.

[0164] 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.

[0165] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0166] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0167] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application 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 diagram. 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 words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0168] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0169] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. 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 application. Therefore, the present application 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.

[0170] 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 application to the forms disclosed herein. Although multiple 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 refrigeration control method, characterized in that: include: receiving cooling instructions; If the cooling instruction indicates that both the cab and the battery need to be cooled, a first temperature difference and a second temperature difference are obtained; wherein the first temperature difference indicates the temperature difference between the actual temperature in the cab and the first target temperature; and the second temperature difference indicates the temperature difference between the water inlet temperature in the battery and the second target temperature; Outputting a priority demand instruction according to the first temperature difference and the second temperature difference; wherein the priority demand instruction includes that the cooling priority of the battery is higher than the cooling priority of the cab, or the cooling priority of the cab is not lower than the cooling priority of the battery; According to the priority demand instruction, the openings of the first electronic expansion valve and the second electronic expansion valve are adjusted; wherein the first electronic expansion valve is used to adjust the flow rate of the fluid flowing to the cab; and the second electronic expansion valve is used to adjust the flow rate of the fluid flowing to the battery.

2. The refrigeration control method according to claim 1, characterized in that: The outputting a priority requirement instruction according to the first temperature difference and the second temperature difference comprises: If the difference between the second temperature difference and the first temperature difference is greater than a preset threshold, outputting a priority demand instruction indicating that the cooling priority of the battery is higher than the cooling priority of the cab; If the difference between the second temperature difference and the first temperature difference is less than or equal to the preset threshold, a priority demand instruction is outputted, indicating that the cooling priority of the cab is not lower than the cooling priority of the battery.

3. The refrigeration control method according to claim 1, characterized in that: The adjusting the openings of the first electronic expansion valve and the second electronic expansion valve according to the priority demand instruction comprises: According to the priority demand instruction, a cab target overheat degree and a battery target overheat degree are obtained; Acquiring a first actual overheat degree of the cab and a second actual overheat degree of the battery; adjusting the opening of the first electronic expansion valve according to the target superheat of the cab and the first actual superheat; The opening degree of the second electronic expansion valve is adjusted according to the battery target superheat and the second actual superheat.

4. The refrigeration control method according to claim 3, characterized in that: The obtaining of the target overheat degree of the cab and the target overheat degree of the battery according to the priority demand instruction comprises: If the priority demand instruction indicates that the cooling priority of the cab is not lower than the cooling priority of the battery, the battery target overheat is set equal to the sum of the cab target overheat, the second temperature difference and a preset modification factor.

5. The refrigeration control method according to claim 3, characterized in that: The obtaining of the battery target overheat and the cab target overheat according to the priority demand instruction includes: If the priority demand instruction indicates that the cooling priority of the battery is higher than the cooling priority of the cab, the target overheat degree of the cab is set equal to the sum of the target overheat degree of the battery, the first temperature difference and a preset correction factor.

6. The refrigeration control method according to claim 3, characterized in that: The adjusting the opening of the first electronic expansion valve according to the target superheat of the cab and the first actual superheat comprises: If the first actual superheat is greater than the target superheat of the cab, increasing the opening of the first electronic expansion valve; If the first actual superheat is less than or equal to the target superheat of the cab, the opening of the first electronic expansion valve is reduced.

7. The refrigeration control method according to claim 3, characterized in that: The adjusting the opening degree of the second electronic expansion valve according to the battery target superheat and the second actual superheat comprises: If the second actual superheat is greater than the battery target superheat, increasing the opening of the second electronic expansion valve; If the second actual superheat is less than or equal to the battery target superheat, the opening of the second electronic expansion valve is reduced.

8. The refrigeration control method according to claim 1, characterized in that: After obtaining the first temperature difference and the second temperature difference, the refrigeration control method further includes: Obtaining a first rotation speed of the compressor according to the actual temperature in the cab and the first target temperature; obtaining a second rotation speed of the compressor according to the water inlet temperature in the battery and the second target temperature; The actual rotation speed of the compressor is adjusted to be the sum of the first rotation speed and the second rotation speed.

9. A refrigeration control device, characterized in that: include: A first receiving module, used for receiving a cooling instruction; A first acquisition module is used to acquire a first temperature difference and a second temperature difference if the cooling instruction indicates that both the cab and the battery need to be cooled; wherein the first temperature difference represents the temperature difference between the actual temperature in the cab and the first target temperature; and the second temperature difference represents the temperature difference between the water inlet temperature in the battery and the second target temperature; A first output module, configured to output a priority demand instruction according to the first temperature difference and the second temperature difference; wherein the priority demand instruction includes that the cooling priority of the battery is higher than the cooling priority of the cab, or that the cooling priority of the cab is not lower than the cooling priority of the battery; The first adjustment module is used to adjust the opening of the first electronic expansion valve and the second electronic expansion valve according to the priority demand instruction; wherein the first electronic expansion valve is used to adjust the flow rate of the fluid flowing to the cab; the second electronic expansion valve is used to adjust the flow rate of the fluid flowing to the battery.

10. An engineering machine, characterized in that: include: The body, which has a cab and batteries; a first electronic expansion valve, used for adjusting the flow rate of the fluid flowing to the cab; a second electronic expansion valve, for adjusting the flow rate of the fluid flowing to the battery; The refrigeration control device according to claim 9, wherein the first electronic expansion valve and the second electronic expansion valve are communicatively connected.

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