Methods, devices, air conditioning systems, and storage media for detecting the status of the electrical control box cover.

Abstract

This application discloses a method, apparatus, air conditioning system, and storage medium for detecting the lid status of an electrical control box, relating to the field of air conditioning equipment technology. The method for detecting the lid status of the electrical control box includes: acquiring the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box when the electrical control box is in an overheated operating state; and determining the lid status of the electrical control box based on the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box. This method automatically detects the lid status of the electrical control box using the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, thereby avoiding manual inspection of the lid and improving the efficiency of lid status detection.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, specifically to a method, device, air conditioning system, and storage medium for detecting the state of the cover of an electrical control box. Background Technology

[0002] At present, multi-split air conditioners are being used more and more widely. Considering cost and ease of engineering installation, the design capacity of a single module in a unit space is getting larger and larger. As a result, the layout space of the electrical control components in the electrical control box of the air conditioning equipment is relatively limited, making the heat dissipation performance of the electrical control box increasingly important.

[0003] In related technologies, refrigerant cooling is typically used for heat dissipation. The cooler refrigerant pipes directly contact the heat dissipation components, thereby lowering the temperature of the electronic control components inside the control box. However, when using refrigerant cooling to dissipate heat from the electronic control components inside the control box, if the box lid is not properly closed, the control box is not in a sealed state. This allows hot outside air to enter the control box, where it encounters cold air and produces a large amount of condensation. This not only affects the normal heat dissipation of the electronic control components but can also cause the internal electronic control components to malfunction, resulting in a heat dissipation failure. Currently, there is no automatic detection method for the status of the control box lid. Summary of the Invention

[0004] The main objective of this application is to provide a method, device, air conditioning system, and storage medium for detecting the state of the lid of an electrical control box, so as to solve the problem that the existing technology cannot automatically detect the state of the lid of the electrical control box.

[0005] Firstly, the method for detecting the cover state of an electrical control box provided in this application is used to detect the cover state inside the electrical control box of an air conditioning system. The air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping for adjusting the refrigerant flow. The electrical control box is equipped with a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output by the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the cover is completely closed. The cooling fan is used to drive the air inside the electrical control box to form an air circulation within the electrical control box.

[0006] The method for detecting the cover status of the electrical control box includes:

[0007] When the electrical control box is in an overheated operating state, the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box are obtained.

[0008] The state of the electrical control box cover is determined based on the opening degree of the throttling device, the rotation speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

[0009] The beneficial effects of this invention are: the cover detection method for the electrical control box provided in this application is used in the electrical control box of an air conditioning system. The electrical control box is equipped with a heat exchanger and a cooling fan. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the box. The cooling fan drives the air inside the electrical control box to form an air circulation within the box.

[0010] Because the control box is sealed when the lid is fully closed, and the heat sink inside is an evaporator or other highly efficient heat dissipation device, the temperature inside the control box is very low. If the lid is not fully closed, hot outside air enters the control box, producing a large amount of condensation and disrupting the air circulation created by the cooling fan. This can cause the components inside the control box to malfunction, leading to overheating of the air conditioner's control box. Therefore, in this application, when the control box is in an overheating state, the cause of the overheating can be detected to determine if it is caused by the lid being completely closed.

[0011] When the control box is in an overheated operating state, the cause of the overheating can be determined by detecting the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the control box. This allows for the determination of the closing state of the control box cover, thus achieving automatic detection of the control box cover status and avoiding manual inspection of the cover, thereby improving the efficiency of the control box cover status detection.

[0012] Furthermore, determining the cover state of the electrical control box based on the opening degree of the throttling device, the rotational speed of the cooling fan, and the frequency of the compressor includes:

[0013] If the speed of the cooling fan is greater than or equal to the maximum speed, the opening degree of the throttling device is greater than or equal to the maximum opening degree, the frequency of the compressor is less than or equal to the minimum frequency, and the ambient temperature of the electrical control box is less than or equal to the maximum ambient set temperature, then it is determined that the cover of the electrical control box is not fully closed.

[0014] Furthermore, after obtaining the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes:

[0015] If the speed of the cooling fan is less than the maximum speed, the speed of the cooling fan is increased to reduce the temperature of the electronic components in the electronic control box.

[0016] Furthermore, after obtaining the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes:

[0017] If the opening degree of the throttling device is less than the maximum opening degree, the opening degree of the throttling device is increased to reduce the temperature of the electrical control components in the electrical control box.

[0018] Furthermore, after obtaining the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes:

[0019] If the frequency of the compressor is greater than the minimum frequency, then the frequency of the compressor is reduced to lower the temperature of the electronic control components in the electronic control box.

[0020] Furthermore, before acquiring the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes:

[0021] The temperature of the electronic control components inside the electronic control box is obtained when the air conditioner is running.

[0022] If the difference between the upper limit temperature of the electronic control component and the detected temperature is less than the temperature difference threshold, then the electronic control box is determined to be in the overheated operating state.

[0023] If the difference between the upper limit temperature of the electronic control component and the detection temperature is greater than or equal to the temperature difference threshold, then the electronic control box is determined to be in a normal temperature operating state.

[0024] Furthermore, the heat exchanger includes an evaporator.

[0025] Secondly, the device for detecting the cover status of the electrical control box provided in this application is used to detect the cover status inside the electrical control box of an air conditioning system. The air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping for adjusting the refrigerant flow. The electrical control box is equipped with a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output by the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the cover is completely closed. The cooling fan is used to drive the air in the electrical control box to form an air circulation inside the electrical control box.

[0026] The cover status detection device of the electrical control box includes:

[0027] The acquisition module is used to acquire the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box when the electrical control box is in an overheated operating state.

[0028] The detection module determines the cover status of the electrical control box based on the opening degree of the throttling device, the rotation speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

[0029] Furthermore, the detection module is specifically used to determine that the cover of the electrical control box is not fully closed if the rotation speed of the cooling fan is greater than or equal to the maximum rotation speed, the opening degree of the throttling device is greater than or equal to the maximum opening degree, the frequency of the compressor is less than or equal to the minimum frequency, and the ambient temperature of the electrical control box is less than or equal to the maximum ambient set temperature.

[0030] Furthermore, the detection module is also used to increase the speed of the cooling fan if the speed of the cooling fan is less than the maximum speed, so as to reduce the temperature of the electronic control components in the electronic control box.

[0031] Furthermore, the detection module is also used to increase the opening degree of the throttling device if the opening degree of the throttling device is less than the maximum opening degree, so as to reduce the temperature of the electronic control components in the electronic control box.

[0032] Furthermore, the detection module is also used to reduce the frequency of the compressor if the frequency of the compressor is greater than the minimum frequency, so as to reduce the temperature of the electronic control components in the electronic control box.

[0033] Furthermore, the acquisition module is also used to acquire the detection temperature of the electronic control components in the electronic control box when the air conditioner is detected to be running; if the difference between the upper limit temperature of the electronic control components and the detection temperature is less than the temperature difference threshold, the electronic control box is determined to be in the overheating operation state; if the difference between the upper limit temperature of the electronic control components and the detection temperature is greater than or equal to the temperature difference threshold, the electronic control box is determined to be in the normal temperature operation state.

[0034] Furthermore, the heat exchanger includes an evaporator.

[0035] Thirdly, this application provides an air conditioning system, which includes a compressor, a refrigerant pipeline, a throttling device disposed on the refrigerant pipeline for regulating the refrigerant flow, and an electrical control box. The electrical control box is equipped with a heat exchanger and a cooling fan. The refrigerant pipeline is used to input the refrigerant output by the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components in the electrical control box. The electrical control box is in a sealed state when the lid is fully closed. The cooling fan is used to drive the air in the electrical control box to form an air circulation within the electrical control box. The controller in the electrical control box is configured as described in the first aspect above.

[0036] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the method described in the first aspect.

[0037] This application provides a method, device, air conditioning system, and storage medium for detecting the cover status of an electrical control box. The method detects the cover status within the electrical control box of an air conditioning system. The air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping to regulate refrigerant flow. The electrical control box contains a heat exchanger and a cooling fan. The refrigerant piping allows refrigerant output from the compressor to be fed into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant, thus dissipating heat from the electrical control components within the electrical control box. The electrical control box is in a sealed state when the cover is fully closed. The cooling fan drives the air within the electrical control box to create air circulation. The method for detecting the cover status of the electrical control box includes: acquiring the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box when the electrical control box is in an overheated operating state; and determining the cover status of the electrical control box based on the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box. In this way, when the control box is in an overheated operating state, the cause of the overheating operation is determined by detecting the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the control box. This allows for the determination of the closing state of the control box cover, thus achieving automatic detection of the control box cover status and avoiding manual inspection of the cover, thereby improving the detection efficiency of the control box cover status. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 A schematic diagram of a heat dissipation system for an electronic control box provided in an embodiment of this application;

[0040] Figure 2 A cross-sectional view of an electrical control box provided in an embodiment of this application;

[0041] Figure 3 A cross-sectional view of another electrical control box provided in an embodiment of this application;

[0042] Figure 4 A flowchart illustrating a method for detecting the state of the lid of an electronic control box, provided in an embodiment of this application;

[0043] Figure 5 A flowchart illustrating another method for detecting the lid state of an electronic control box provided in this application embodiment;

[0044] Figure 6 A flowchart illustrating another method for detecting the state of the lid of an electronic control box provided in an embodiment of this application;

[0045] Figure 7 A schematic diagram of the structure of the device for detecting the state of the lid of the electrical control box provided in the embodiments of this application;

[0046] Figure 8 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0047] Explanation of icon numbers:

[0048] label name label name 101 compressor 102 Four-way reversing valve 103 Outdoor unit heat exchanger assembly 104 Main throttling component 105 Auxiliary throttling components 106 Electrical control box 107 heat exchanger 108 Cooling fan 109 First temperature sensor 110 Low-pressure side pressure sensor 111 High-pressure side pressure sensor 112 Liquid-side shut-off valve 113 Gas-side shut-off valve 114 Electronic control motherboard 115 Second temperature sensor 116 Heat dissipation fins Detailed Implementation

[0049] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0050] The heat dissipation system of the electrical control box involved in this application will be described first below.

[0051] Figure 1 This is a schematic diagram of a heat dissipation system for an electrical control box provided in an embodiment of this application. Figure 1As shown, the heat dissipation system of the electrical control box 106 may include a compressor 101, a four-way reversing valve 102, an indoor and outdoor heat exchanger assembly 103, a main throttling component 104, an auxiliary throttling component 105, the electrical control box 106, a liquid-side shut-off valve 112, and a gas-side shut-off valve 113. The electrical control box 106 may contain multiple heat dissipation components, such as a heat exchanger 107 and a cooling fan 108.

[0052] The first side of the electrical control box 106 is connected to the indoor and outdoor heat exchanger assembly 103 and the liquid-side shut-off valve 112, respectively. The second side of the electrical control box 106 is connected to the compressor 101 and the four-way reversing valve 102, respectively. The four-way reversing valve 102 is also connected to the compressor 101, the indoor and outdoor heat exchanger assembly 103, and the gas-side shut-off valve 113, respectively. The auxiliary throttling component 105 can be set on the first side of the electrical control box 106, and the main throttling component 104 is set on the side where the indoor and outdoor heat exchanger assembly 103 is connected to the electrical control box 106.

[0053] In some embodiments, a sensor device may also be provided in the heat dissipation system of the control box 106. For example, a first temperature sensor 109 may be provided on the second side of the control box 106 to detect the ambient temperature of the control box 106; a low-pressure side pressure sensor 110 and a high-pressure side pressure sensor 111 are respectively provided on both sides of the compressor 101.

[0054] It should be noted that the embodiments of this application do not limit the heat dissipation method of the electrical control box 106. A combination of heat dissipation fan 108 and heat dissipation fins 116 can be used for heat dissipation, and refrigerant cooling can be added to the heat dissipation fan 108 and heat dissipation fins 116.

[0055] Figure 2 This is a cross-sectional view of an electrical control box provided in an embodiment of this application. Figure 3 A cross-sectional view of another electrical control box provided in an embodiment of this application. (See figure) Figure 2 and Figure 3 The electrical control box 106 shown employs a combination of a fan, heat dissipation fins 116, and refrigerant cooling for heat dissipation. The fan in the electrical control box 106 drives airflow within the box, forming a cooling effect similar to... Figure 2 The air circulation is shown in a counter-clockwise direction, or as shown in the image. Figure 3 The air circulation is clockwise, as shown. A second temperature sensor 115 can also be installed in the control box 106 to detect the temperature inside the control box 106 in real time and adjust the fan speed accordingly.

[0056] Continue to refer to Figure 2 or Figure 3The electrical control box 106 forms a closed space. When the air conditioner is cooling or heating, some of the liquid refrigerant is throttled by the throttling component and then evaporates and absorbs heat in the heat exchanger 107. The circulating air is cooled by evaporation after passing through the heat exchanger 107. It first passes through the front-mounted electrical control main board 114 and other components, which carry away the heat generated by the electrical control main board 114 and other components. Then it flows through the rear-mounted heat dissipation fins 116, which transfer the heat generated by the electrical control components to the outside of the electrical control box 106. Then it flows back to the heat exchanger 107, forming a complete air circulation.

[0057] For example, when the air conditioner is turned on, the throttling device can open to the initial opening degree P0, which can be within the range of 0 to 1 / 3 of the maximum opening degree Pmax. The low-pressure side pressure sensor 110 can detect the low-pressure side pressure Pe in real time, and its corresponding saturation temperature is Te. The first temperature sensor 109 can detect the outlet temperature Tb of the heat exchanger 107. Correspondingly, the outlet superheat SH of the heat exchanger 107 can be determined by Te and Tb, that is, SH = Tb - Te. Under normal circumstances, the target outlet superheat SHs can be 0 to 10°C. The throttling device can be proportionally integrated (PI) adjusted according to the difference between the real-time outlet superheat SHs and the target superheat SHs.

[0058] For example, the detection value of the second temperature sensor 115 inside the control box 106 can be Tf, and the upper limit temperature of the control box 106 can be Tm. During the operation of the air conditioner, in order to ensure that the components in the control box 106 are not burned out by the circuit, it is usually necessary to ensure that Tm-Tf≥ΔT. Here, ΔT is the design tolerance, and ΔT generally takes a value between 0 and 5℃.

[0059] For example, the cooling fan 108 can be a variable frequency fan with an initial speed of N0. The speed of the cooling fan 108 can be adjusted according to the difference between Tf and Tm. The adjustment method can be step-by-step adjustment or PI adjustment.

[0060] For example, when the air conditioner is turned on, the throttling device opens to its initial opening degree P0, and the cooling fan 108 also opens to its initial opening degree P0. Subsequently, the value of Tf is determined in real time, and the speed of the cooling fan 108 and the opening degree of the throttling device are adjusted according to the difference between Tf and Tm.

[0061] It should be noted that the embodiments of this application do not limit the adjustment period of the speed of the cooling fan 108 and the opening of the throttling component. For example, the adjustment period of the cooling fan 108 is Tp1 and the adjustment period of the throttling component is Tp2. Both Tp1 and Tp2 can be any value from 0 to 120 seconds.

[0062] It should be understood that the heat dissipation method using only a combination of fan and heat dissipation fins 116 is low in cost, but has limited heat dissipation capacity. When operating in a high-temperature environment, it will worsen the heat dissipation conditions of the electrical control components in the electrical control box 106, and in severe cases, it may easily lead to the high-temperature shutdown protection of the air conditioning equipment. Figure 2 and Figure 3 The electrical control box 106 shown not only has a heat dissipation method consisting of a fan and heat dissipation fins 116, but also a refrigerant cooling method to dissipate heat from the electrical control box 106, thereby ensuring the heat dissipation effect.

[0063] However, if the control box lid is not properly closed, it will alter the airflow direction inside the box. Simultaneously, hot outside air enters the box, where it cools and produces a large amount of condensation. This not only affects the normal heat dissipation of the electronic components but can also cause them to malfunction, resulting in a heat dissipation failure. Currently, related technologies still require manual inspection of the control box lid's condition and cannot yet achieve automatic detection.

[0064] To address the aforementioned issues, this application provides a method, apparatus, air conditioning system, and storage medium for detecting the state of the lid of an electrical control box. When the electrical control box is in an overheated operating state, the cause of the overheating can be determined by detecting heat dissipation control parameters, heat generation control parameters, and ambient temperature, thereby enabling automatic detection.

[0065] It is understood that the execution subject of this application embodiment can be a detection device for the state of the lid of the electronic control box, which can be part or all of a certain device, such as the controller in the aforementioned electronic control box. The controller can be a microcontroller unit (MCU), etc. This application embodiment does not limit this.

[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0067] Figure 4 This is a flowchart illustrating a method for detecting the state of the cover of an electrical control box according to an embodiment of this application. The following is a detailed explanation of how to detect the state of the cover of the electrical control box. Figure 4 As shown, the method for detecting the state of the cover of the electrical control box includes:

[0068] S201. When the electrical control box is in an overheated operating state, obtain the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

[0069] The following section will first describe the air conditioning system in which the aforementioned control box is located.

[0070] In this application, the air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping to regulate the refrigerant flow. The electrical control box contains a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output from the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the cover is fully closed. The cooling fan is used to drive the air in the electrical control box to form an air circulation within the electrical control box.

[0071] It should be understood that the embodiments of this application do not limit the type of heat exchanger. In some embodiments, the heat exchanger includes an evaporator, etc. The embodiments of this application also do not limit the type of throttling device. For example, it may include an electronic expansion valve.

[0072] In other embodiments, additional heat dissipation fins may be added to the air conditioning system to improve the heat dissipation of the electrical control box.

[0073] In this application, when the electrical control box is in an overheated operating state, the speed of the cooling fan reflects its operating status, the opening degree of the throttling device reflects the refrigerant flow rate into the radiator, and the compressor frequency senses its operating status. Therefore, by considering the opening degree of the throttling device, the speed of the cooling fan, the compressor frequency, and the ambient temperature of the electrical control box, the cause of the electrical control box's heat dissipation failure can be quickly determined, thereby determining the state of the electrical control box cover.

[0074] In some embodiments, the ambient temperature of the electrical control box can be obtained by a temperature sensor, which can be set outside the electrical control box to detect the ambient temperature of the electrical control box in real time and send the ambient temperature of the electrical control box to the controller.

[0075] It should be understood that the embodiments of this application do not limit how to determine that the control box is in an overheated operating state. In some embodiments, the controller obtains the detected temperature of the electronic control components inside the control box when it detects that the air conditioner is running. If the difference between the upper limit temperature of the electronic control components and the detected temperature is less than a temperature difference threshold, the control box is determined to be in an overheated operating state. If the difference between the upper limit temperature of the electronic control components and the detected temperature is greater than or equal to the temperature difference threshold, the control box is determined to be in a normal temperature operating state.

[0076] The upper limit temperature of the electronic control components can be set according to the actual situation, and this application embodiment does not impose any restrictions on this. A temperature sensor can be installed inside the aforementioned electronic control box, which can collect the temperature of the electronic control box in real time and transmit the collected temperature to the controller.

[0077] S202. Determine the cover status of the electrical control box based on the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

[0078] It should be understood that this application does not limit how the lid state of the electrical control box is determined based on the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box. In some embodiments, if the speed of the cooling fan is greater than or equal to the maximum speed, the opening degree of the throttling device is greater than or equal to the maximum opening degree, the frequency of the compressor is less than or equal to the minimum frequency, and the ambient temperature of the electrical control box is less than or equal to the maximum ambient set temperature, then it is determined that the lid of the electrical control box is not fully closed.

[0079] It should be noted that heat dissipation failures of the electrical control box can generally be categorized into four types: the heat dissipation components not using maximum cooling capacity, abnormal operation of heat-generating components, environmental overheating, and the electrical control box cover not being closed.

[0080] If the cooling fan speed is greater than or equal to the maximum speed and the throttling device opening is greater than or equal to the maximum opening, it indicates that the air conditioner's cooling components are operating at maximum cooling capacity. In this case, the overheating fault of the control box can be ruled out as being caused by the cooling components not operating at maximum cooling capacity. If the compressor frequency is as indicated, it indicates that the air conditioner's heat-generating components are not exceeding their maximum operating power. In this case, the overheating fault of the control box can be ruled out as being caused by abnormal operation of the heat-generating components. If the ambient temperature is less than or equal to the maximum ambient set temperature, it indicates that the ambient temperature around the control box is not exceeding the set value. In this case, the overheating fault of the control box can be ruled out as being caused by overheating.

[0081] When the cooling fan speed is greater than or equal to the maximum speed, the throttling device opening degree is greater than or equal to the maximum opening degree, the compressor frequency is less than or equal to the minimum frequency, and the ambient temperature of the control box is less than or equal to the maximum ambient set temperature, the three types of heat dissipation faults can be ruled out: the heat dissipation component not using the maximum cooling capacity, abnormal operation of the heat-generating component, and ambient overheating. Accordingly, it can be determined that the heat dissipation fault of the control box is due to the control box cover not being closed, thus realizing the automatic detection of the control box cover status.

[0082] In this application, if it is detected that the cause of the heat dissipation failure of the control box is not that the cover of the control box is not closed, the opening degree of the throttling device, the speed of the cooling fan, and the frequency of the compressor can be adjusted accordingly to reduce the temperature of the control box.

[0083] In some embodiments, if the speed of the cooling fan is less than the maximum speed, the speed of the cooling fan is increased to reduce the temperature of the electronic components in the control box.

[0084] For example, when the rotational speed of the cooling fan is less than its maximum value, the air circulation speed can be increased by increasing the fan's rotational speed, thereby reducing the temperature of the electronic components inside the control box. It should be understood that this application embodiment does not limit the maximum value of the cooling fan's rotational speed, which can be determined based on the actual model of the cooling fan.

[0085] In some embodiments, if the opening degree of the throttling device is less than the maximum opening degree, the opening degree of the throttling device is increased to reduce the temperature of the electronic control components in the electronic control box.

[0086] For example, if the opening degree of the throttling component is less than its maximum value, the flow rate of the coolant can be increased by increasing the opening degree of the throttling component, thereby reducing the temperature of the electronic control components in the control box. It should be understood that the embodiments of this application do not limit the maximum value of the opening degree of the throttling component, and it can be determined according to the actual model of the throttling component.

[0087] In other embodiments, if the compressor frequency is greater than the minimum frequency, the compressor frequency is reduced to lower the temperature of the electronic control components within the control box. Alternatively, if the compressor frequency is greater than the minimum frequency and the ambient temperature of the control box is less than or equal to the maximum ambient set temperature, the compressor frequency is reduced to lower the temperature of the electronic control components within the control box.

[0088] For example, when the compressor power is greater than the maximum value of the compressor power, it can be determined that the compressor is in an abnormal operating state. At this time, the temperature of the electronic control components can be restored to normal operating state by reducing the power of the compressor. That is, reducing the heat generated by the compressor reduces the ambient temperature, which in turn reduces the temperature of the electronic control components in the electronic control box.

[0089] For example, when the ambient temperature is higher than the maximum set ambient temperature, it can be determined that the overheating of the electronic control components is caused by the ambient temperature. In this case, the temperature can be reduced by decreasing the power of the compressor, thereby reducing the heat dissipated by the compressor to the environment and thus reducing the ambient temperature, which in turn reduces the temperature of the electronic control components inside the control box.

[0090] The method for detecting the cover status of the electrical control box provided in this application can determine whether the cause of the electrical control box heat dissipation failure is that the cover of the electrical control box is not closed when the electrical control box is in an overheated operating state by detecting the heat dissipation control parameters, the heat generation control parameters and the ambient temperature, thereby determining the cover status of the electrical control box.

[0091] Based on the above embodiments, the following explains how to determine whether the electrical control box is in an overheated operating state. Figure 5 A flowchart illustrating another method for detecting the lid state of an electronic control box provided in this application embodiment is shown below. Figure 5 As shown, the method for detecting the state of the cover of the electrical control box includes:

[0092] S301. When the air conditioner is detected to be running, obtain the detected temperature of the electronic control components in the electronic control box.

[0093] The temperature of the electronic control components inside the aforementioned electronic control box can be obtained through temperature sensors installed on the electronic control components.

[0094] It should be understood that the embodiments of this application do not limit when the temperature sensor collects the detected temperature of the electronic control components. In some embodiments, when the air conditioner is detected to be powered on, the temperature sensor can start to collect the temperature of the electronic control components in real time and transmit the collected temperature to the controller.

[0095] S302. Determine whether the difference between the upper limit temperature of the electronic control component and the detection temperature is less than the temperature difference threshold.

[0096] If yes, proceed to step S304; otherwise, proceed to step S303.

[0097] It should be understood that the embodiments of this application do not limit the upper limit temperature of the electronic control components. It can be set to the temperature that causes the electronic control components in the electronic control box to short-circuit and burn out. It can be set according to the actual situation, for example, it can be set to 80 degrees Celsius.

[0098] Accordingly, this application embodiment does not limit the above-mentioned temperature difference threshold, which can be a safe temperature difference from the upper limit temperature. For example, it can be set to 5 degrees Celsius. That is, when the difference between the upper limit temperature and the detection temperature is less than 5 degrees Celsius, the control box is in an overheated operation state, and when the difference between the upper limit temperature and the detection temperature is greater than or equal to 5 degrees Celsius, the control box is in a normal temperature operation state.

[0099] S303. Ensure the electrical control box is operating at room temperature.

[0100] S304. Confirm that the electrical control box is in an overheated operating state.

[0101] S305. When the electrical control box is in an overheated operating state, obtain the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

[0102] S306. Determine the cover status of the electrical control box based on the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

[0103] Based on the above embodiments, the process of determining the state of the control box cover according to the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the control box will be explained in detail below. Figure 6 A flowchart illustrating another method for detecting the lid state of an electronic control box provided in this application embodiment is shown below. Figure 6 As shown, the method for detecting the state of the cover of the electrical control box includes:

[0104] S401. Obtain the detection temperature of the electronic control components inside the electronic control box.

[0105] S402. Determine whether the difference between the upper limit temperature of the electronic control component and the detection temperature is less than the temperature difference threshold.

[0106] If yes, proceed to step S403; otherwise, proceed to step S401.

[0107] S403. Determine whether the speed of the cooling fan is greater than the maximum speed or whether the opening of the throttling device is greater than the maximum opening.

[0108] If yes, proceed to step S405; otherwise, proceed to step S404.

[0109] S404. Increase the speed of the cooling fan or the opening of the throttling device.

[0110] Step S401 is executed after step S404.

[0111] S405. Determine if the compressor's power is greater than its maximum power.

[0112] If yes, proceed to step S406; otherwise, proceed to step S407.

[0113] S406. Reduce the power of the compressor.

[0114] Step S401 is executed after step S406.

[0115] S407. Determine whether the ambient temperature is greater than the maximum ambient set temperature.

[0116] If yes, proceed to step S406; otherwise, proceed to step S408.

[0117] S408. It has been determined that the cover of the electrical control box is not closed.

[0118] In this application, when the air conditioner starts running, the detected temperature Tf of the electronic control components inside the control box can be obtained and compared with the upper limit temperature Tm of the electronic control components. If Tm - Tf < temperature difference threshold ΔT, the temperature of the electronic control components inside the control box is adjusted using a cooling fan and a throttling device based on the temperature difference between Tm and Tf. When the cooling fan speed is at its highest or the throttling device opening is at its maximum, it indicates that the heat exchange capacity of the air conditioner's heat exchanger has reached its limit. If the control box is still overheating at this time, the temperature of the electronic control components inside the control box can be further adjusted by using the compressor power. The actual power Pt of the compressor can be compared with the designed maximum power Ptmax. If Pt exceeds Ptmax, the temperature of the electronic control components inside the control box can be reduced by decreasing the compressor power (frequency reduction).

[0119] If Pt does not exceed Ptmax, then the ambient temperature Th is checked. If the ambient temperature Th exceeds the designed maximum ambient temperature Thmax, it indicates that the heat transfer from the ambient temperature to the control box may exceed the design value, requiring the compressor to operate at reduced power (reduced frequency). If the ambient temperature does not exceed Thmax, it is determined that the control box cover is not properly closed, causing a change in the airflow direction inside the control box. This allows hot external air to enter the control box, generating a large amount of condensation, which in turn leads to heat dissipation failure of the electronic control components. Then, an alarm or fault code is output to the user.

[0120] Wherein, the actual power of the compressor Pt = fn(Tc, Te, NH) * a, Tc is the cooling temperature corresponding to the exhaust pressure detected by the high-pressure side pressure sensor, Te is the evaporation temperature corresponding to the return gas pressure detected by the low-pressure side pressure sensor, NH is the actual operating frequency of the compressor, and a is the verification coefficient.

[0121] The method for detecting the cover status of the electrical control box provided in this application can determine whether the cause of the electrical control box heat dissipation failure is that the cover of the electrical control box is not closed when the electrical control box is in an overheated operating state by detecting the heat dissipation control parameters, the heat generation control parameters and the ambient temperature, thereby determining the cover status of the electrical control box.

[0122] Figure 7This is a schematic diagram of the structure of the device for detecting the lid state of an electrical control box provided in an embodiment of this application. The device can be implemented using software, hardware, or a combination of both, such as the controller described in the above embodiment, to execute the method for detecting the lid state of the electrical control box described in the above embodiment. This device is used to detect the lid state inside the electrical control box of an air conditioning system. The air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping to regulate the refrigerant flow. The electrical control box contains a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output from the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the lid is fully closed. The cooling fan drives the air inside the electrical control box to form an air circulation.

[0123] like Figure 7 As shown, the detection device 500 for the lid status of the electrical control box includes: an acquisition module 501 and a detection module 502.

[0124] The acquisition module 501 is used to acquire the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box when the electrical control box is in an overheated operating state.

[0125] The detection module 502 determines the state of the control box cover based on the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the control box.

[0126] It needs to be explained that, Figure 7 The device for detecting the lid status of the electrical control box provided in the illustrated embodiment can be used to execute the method for detecting the lid status of the electrical control box provided in any of the above embodiments. The specific implementation and technical effects are similar, and will not be described in detail here.

[0127] This application embodiment also provides an air conditioning system, which includes a compressor, refrigerant piping, a throttling device installed on the refrigerant piping for regulating refrigerant flow, and an electrical control box. The electrical control box is equipped with a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output from the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the lid is fully closed. The cooling fan is used to drive the air in the electrical control box to form an air circulation within the electrical control box. The controller in the electrical control box is configured to execute the above-described method.

[0128] Figure 8 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application. Figure 8 As shown, the air conditioner may include at least one processor 601 and a memory 602. Figure 8The example shown is an air conditioner with a single processor.

[0129] The memory 602 is used to store programs. Specifically, the program may include program code, which includes computer operation instructions.

[0130] The memory 602 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0131] The processor 601 is used to execute computer execution instructions stored in the memory 602 to implement the above method.

[0132] The processor 601 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0133] Optionally, in specific implementations, if the communication interface, memory 602, and processor 601 are implemented independently, they can be interconnected via a bus to complete communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc., but this does not imply that there is only one bus or one type of bus.

[0134] Optionally, in a specific implementation, if the communication interface, memory 602, and processor 601 are integrated on a single chip, then the communication interface, memory 602, and processor 601 can communicate through an internal interface.

[0135] This application also provides a chip; the chip includes a processor and a memory.

[0136] The processor is used to retrieve and run computer programs from memory, causing the device with the chip installed to perform the above methods.

[0137] This application also provides a computer-readable storage medium, which may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. Specifically, the computer-readable storage medium stores program information, which is used in the above-described method.

[0138] This application also provides a program that, when executed by a processor, performs the methods provided in the above method embodiments.

[0139] This application also provides a program product, such as a computer-readable storage medium, which stores instructions that, when run on a computer, cause the computer to perform the methods provided in the above-described method embodiments.

[0140] The aforementioned computer-readable medium may be included in the aforementioned air conditioner; or it may exist independently and not assembled into the air conditioner.

[0141] The aforementioned computer-readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the methods shown in the above embodiments, such as the methods defined in the embodiments of this disclosure.

[0142] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0143] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

[0144] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0145] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for detecting the state of the cover of an electrical control box, characterized in that, This device is used to detect the state of the cover inside the electrical control box of an air conditioning system. The air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping to regulate the refrigerant flow. The electrical control box is equipped with a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output from the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the cover is completely closed. The cooling fan is used to drive the air inside the electrical control box to form an air circulation within the electrical control box. The method for detecting the cover status of the electrical control box includes: When the electrical control box is in an overheated operating state, the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box are obtained. The state of the electrical control box cover is determined based on the opening degree of the throttling device, the rotation speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

2. The method according to claim 1, characterized in that, Determining the cover state of the electrical control box based on the opening degree of the throttling device, the rotational speed of the cooling fan, and the frequency of the compressor includes: If the speed of the cooling fan is greater than or equal to the maximum speed, the opening degree of the throttling device is greater than or equal to the maximum opening degree, the frequency of the compressor is less than or equal to the minimum frequency, and the ambient temperature of the electrical control box is less than or equal to the maximum ambient set temperature, then it is determined that the cover of the electrical control box is not fully closed.

3. The method according to claim 2, characterized in that, After obtaining the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes: If the speed of the cooling fan is less than the maximum speed, the speed of the cooling fan is increased to reduce the temperature of the electronic components in the electronic control box.

4. The method according to claim 2, characterized in that, After obtaining the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes: If the opening degree of the throttling device is less than the maximum opening degree, the opening degree of the throttling device is increased to reduce the temperature of the electrical control components in the electrical control box.

5. The method according to claim 2, characterized in that, After obtaining the opening degree of the throttling device, the rotational speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes: If the frequency of the compressor is greater than the minimum frequency, then the frequency of the compressor is reduced to lower the temperature of the electronic control components in the electronic control box.

6. The method according to claim 1, characterized in that, Before obtaining the opening degree of the throttling device, the rotation speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box, the method further includes: The temperature of the electronic control components inside the electronic control box is obtained when the air conditioning system is running. If the difference between the upper limit temperature of the electronic control component and the detected temperature is less than the temperature difference threshold, then the electronic control box is determined to be in the overheated operating state. If the difference between the upper limit temperature of the electronic control component and the detection temperature is greater than or equal to the temperature difference threshold, then the electronic control box is determined to be in a normal temperature operating state.

7. The method according to any one of claims 1-6, characterized in that, The heat exchanger includes an evaporator.

8. A device for detecting the state of the lid of an electrical control box, characterized in that, This device is used to detect the state of the cover inside the electrical control box of an air conditioning system. The air conditioning system includes a compressor, refrigerant piping, and a throttling device installed on the refrigerant piping to regulate the refrigerant flow. The electrical control box is equipped with a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output from the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components inside the electrical control box. The electrical control box is in a sealed state when the cover is completely closed. The cooling fan is used to drive the air inside the electrical control box to form an air circulation within the electrical control box. The cover status detection device of the electrical control box includes: The acquisition module is used to acquire the opening degree of the throttling device, the speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box when the electrical control box is in an overheated operating state. The detection module determines the cover status of the electrical control box based on the opening degree of the throttling device, the rotation speed of the cooling fan, the frequency of the compressor, and the ambient temperature of the electrical control box.

9. An air conditioning system, characterized in that, The air conditioning system includes a compressor, refrigerant piping, a throttling device installed on the refrigerant piping for regulating refrigerant flow, and an electrical control box. The electrical control box contains a heat exchanger and a cooling fan. The refrigerant piping is used to input the refrigerant output from the compressor into the heat exchanger. The heat exchanger absorbs heat through the evaporation of the flowing refrigerant to dissipate heat from the electrical control components within the electrical control box. The electrical control box is in a sealed state when the lid is fully closed. The cooling fan drives the air within the electrical control box to create air circulation within the box. The controller in the electrical control box is configured to perform the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, implement the method as described in any one of claims 1 to 7.

Images