Method and device for judging abnormality of refrigeration air duct

Abstract

The application provides a refrigeration air duct abnormality judgment method and device. The refrigeration air duct abnormality judgment method comprises the following steps: detecting the working state of a refrigeration device within a preset time length; when it is detected that the working state of the refrigeration device is a normal start-stop state, obtaining the average refrigeration time length of a variable temperature chamber within the preset time length; determining whether the state of the refrigeration air duct is abnormal according to the average refrigeration time length and an average refrigeration time length threshold range; when it is detected that the working state of the refrigeration device is a continuous non-refrigeration state, obtaining the shutdown point temperature, the environment temperature and the variable temperature chamber temperature; and determining whether the state of the refrigeration air duct is abnormal according to the shutdown point temperature, the environment temperature and the variable temperature chamber temperature. Through the above method, it is determined whether the state of the refrigeration air duct in the refrigeration device is abnormal, and then it is determined whether the splicing surface in the refrigeration device is in poor contact, so that the refrigeration device with the poor contact surface can be repaired in time, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration, and more specifically, to a method and apparatus for determining abnormalities in refrigerated air ducts. Background Technology

[0002] In refrigeration equipment, due to structural limitations, there is a joint between the refrigeration air duct and the supply air duct. When the joint is not properly sealed, cold air can enter the bottom of the refrigeration compartment through the gap, resulting in low temperature or freezing inside the refrigeration compartment. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method and device for judging the abnormality of the refrigeration air duct. The method uses the average cooling time of the refrigeration equipment within a preset time, the ambient temperature, the temperature of the variable temperature compartment, and the temperature at the shutdown point to jointly determine whether there is an abnormality in the state of the refrigeration air duct in the refrigeration equipment, and then determines whether there is poor contact at the splicing surfaces of the refrigeration equipment. This allows for timely repair of refrigeration equipment with poor contact at the contact surfaces, thereby improving the user experience.

[0004] According to a first aspect of the present invention, a method for determining an abnormality in a refrigerated air duct is provided, applied to a control module in a refrigeration device. The refrigeration device further includes a refrigeration compartment, an evaporation chamber, and an ambient temperature sensor. A refrigerated air duct for gas transmission is provided between the refrigeration compartment and the evaporation chamber. The refrigeration compartment includes a variable temperature compartment and a variable temperature sensor disposed in the variable temperature compartment for measuring its temperature. The ambient temperature sensor is disposed outside the refrigeration compartment. The control module is electrically connected to the ambient temperature sensor and the variable temperature sensor. The method includes: detecting the operating state of the refrigeration device within a preset time period, wherein the operating state includes a normal start-stop state and a continuously non-refrigerating state; upon detecting the abnormality of the refrigeration device's operating state... When the system is in a normal start-stop state, the average cooling time of the variable temperature chamber within a preset time period is obtained; based on the average cooling time and the average cooling time threshold range, it is determined whether the state of the refrigeration duct is abnormal; when the working state of the refrigeration equipment is detected to be a continuous non-cooling state, the shutdown point temperature, ambient temperature, and variable temperature chamber temperature are obtained, wherein the shutdown point temperature is the temperature when the refrigeration equipment last stopped working, the ambient temperature is the temperature of the variable temperature chamber outside the refrigeration equipment collected by the ambient temperature sensor, and the variable temperature chamber temperature is the current temperature of the variable temperature chamber collected by the variable temperature sensor; based on the shutdown point temperature, ambient temperature, and variable temperature chamber temperature, it is determined whether the state of the refrigeration duct is abnormal.

[0005] In one possible implementation of the first aspect, the average cooling time threshold range includes a first time threshold and a second time threshold, wherein the first time threshold is the upper limit of the average cooling time threshold range, and the second time threshold is the lower limit of the average cooling time threshold range. The step of determining whether the state of the refrigerated air duct is abnormal based on the average cooling time and the average cooling time threshold range includes: if the average cooling time is greater than the first time threshold, then determining that the state of the refrigerated air duct is normal; if the average cooling time is greater than the second time threshold, and the average cooling time is less than or equal to the first time threshold, then obtaining the average operating rate of the variable temperature chamber within a preset time; determining whether the state of the refrigerated air duct is abnormal based on the average operating rate and the average operating rate threshold range; if the average cooling time is less than the second time threshold, obtaining the variable temperature chamber temperature and the shutdown point temperature of the variable temperature chamber; and determining whether the state of the refrigerated air duct is abnormal based on the variable temperature chamber temperature and the shutdown point temperature.

[0006] In one possible implementation of the first aspect, the average operating rate threshold range includes a lower limit threshold for the average operating rate. The step of determining whether the refrigerated air duct is abnormal based on the average operating rate and the average operating rate threshold range includes: if the average operating rate is less than or equal to the lower limit threshold for the average operating rate, then determining that the state of the refrigerated air duct is abnormal; if the operating rate ratio is greater than the lower limit threshold for the average operating rate, sending a start / stop command to the refrigeration equipment, wherein the start / stop command includes a preset number of start / stop cycles; after the refrigeration equipment performs the preset number of start / stop cycles based on the start / stop command, obtaining the low-temperature duration and the total start / stop duration, wherein the low-temperature duration is the total duration corresponding to the temperature of the variable temperature compartment being lower than the shutdown point temperature within the preset number of start / stop cycles, and the total start / stop duration is the total duration corresponding to the refrigeration equipment completing the preset number of start / stop cycles; determining whether the state of the refrigerated air duct is abnormal based on the low-temperature duration and the total start / stop duration.

[0007] In one possible implementation of the first aspect, the step of determining whether the state of the refrigerated air duct is abnormal based on the low temperature duration and the total start-stop duration includes: obtaining a low temperature duration threshold corresponding to the low temperature duration based on the total start-stop duration; if the low temperature duration is less than or equal to the low temperature duration threshold, then determining that the state of the refrigerated air duct is normal; if the low temperature duration is greater than the low temperature duration threshold, then determining that the state of the refrigerated air duct is abnormal.

[0008] In one possible implementation of the first aspect, the step of determining whether the state of the refrigeration duct is abnormal based on the temperature of the variable temperature chamber and the temperature at the shutdown point includes: obtaining the lowest temperature of the variable temperature chamber when the refrigeration equipment is not cooling and the lowest temperature at the shutdown point of the variable temperature chamber after the refrigeration equipment is shut down; if the lowest temperature of the variable temperature chamber is greater than or equal to the lowest temperature at the shutdown point, then the state of the refrigeration duct is determined to be normal; if the lowest temperature of the variable temperature chamber is less than the lowest temperature at the shutdown point, then the state of the refrigeration duct is determined to be abnormal.

[0009] In one possible implementation of the first aspect, the step of determining whether the state of the refrigerated air duct is abnormal based on the shutdown point temperature, the ambient temperature, and the variable temperature chamber temperature includes: if the duration for which the variable temperature chamber temperature is lower than the shutdown point temperature is greater than or equal to a first preset duration, and the ambient temperature is greater than or equal to a preset ambient temperature, then the state of the refrigerated air duct is determined to be abnormal; if the duration for which the variable temperature chamber temperature is lower than the shutdown point temperature is greater than or equal to the first preset duration, and the ambient temperature is lower than the preset ambient temperature, then the temperature of the variable temperature chamber is continued to be detected for a second preset duration; if the variable temperature chamber temperature is lower than the shutdown point temperature within the second preset duration, then the state of the refrigerated air duct is determined to be abnormal; if the variable temperature chamber temperature is greater than or equal to the shutdown point temperature within the second preset duration, and the variable temperature chamber temperature rises, then the state of the refrigerated air duct is determined to be normal.

[0010] In one possible implementation of the first aspect, before the step of determining whether the state of the refrigerated air duct is abnormal based on the average cooling time and the average cooling time threshold range, the method further includes: obtaining the average cooling time threshold range, wherein the average cooling time threshold range is obtained by testing multiple sample refrigeration devices identical to the refrigeration device in the same environment.

[0011] In one possible implementation of the first aspect, the refrigeration equipment further includes an alarm module. After the step of determining whether the state of the refrigeration duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature chamber temperature, the method further includes: when it is determined that the state of the refrigeration duct is abnormal, sending an alarm command to the alarm module so that the alarm module can issue an alarm for the refrigeration duct in the abnormal state.

[0012] In one possible implementation of the first aspect, the refrigeration device includes a fruit and vegetable box and a fruit and vegetable temperature sensor for monitoring the temperature of the fruit and vegetable box. The fruit and vegetable temperature sensor is electrically connected to the control module and includes: acquiring the temperature of the fruit and vegetable box, wherein the temperature of the fruit and vegetable box is the current temperature of the fruit and vegetable box as monitored by the fruit and vegetable temperature sensor; the step of determining whether the state of the refrigeration duct is abnormal based on the shutdown point temperature, the ambient temperature, and the variable temperature compartment temperature further includes: determining whether the state of the refrigeration duct is abnormal based on the shutdown point temperature, the ambient temperature, the variable temperature compartment temperature, and the fruit and vegetable box temperature.

[0013] According to a second aspect of the present invention, a device for judging abnormalities in a refrigerated air duct is provided, applied to a control module in a refrigeration equipment. The refrigeration equipment further includes a refrigeration chamber, an evaporation chamber, and an ambient temperature sensor. A refrigerated air duct for gas transmission is provided between the refrigeration chamber and the evaporation chamber. The refrigeration chamber includes a variable temperature compartment and a variable temperature sensor disposed in the variable temperature compartment for measuring its temperature. The ambient temperature sensor is disposed outside the refrigeration chamber. The control module is electrically connected to the ambient temperature sensor and the variable temperature sensor. The device includes: a working state detection module for detecting the working state of the refrigeration equipment within a preset time period, wherein the working state includes a normal start / stop state and a continuous non-cooling state; and an average cooling time acquisition module for detecting when the working state of the refrigeration equipment is... During normal start-stop operation, the average cooling time of the variable temperature compartment within a preset time period is obtained; a first state determination module is used to determine whether the state of the refrigeration duct is abnormal based on the average cooling time and the average cooling time threshold range; a temperature acquisition module is used to acquire the shutdown point temperature, ambient temperature, and variable temperature compartment temperature when the working state of the refrigeration equipment is detected to be a continuous non-cooling state, wherein the shutdown point temperature is the temperature when the refrigeration equipment last stopped working, the ambient temperature is the temperature of the variable temperature compartment outside the refrigeration equipment collected by the ambient temperature sensor, and the variable temperature compartment temperature is the current temperature of the variable temperature compartment collected by the variable temperature sensor; a second state determination module is used to determine whether the state of the refrigeration duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature compartment temperature.

[0014] Based on any of the above aspects, embodiments of the present invention provide a method and apparatus for determining abnormalities in a refrigerated air duct. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a side sectional view of the internal structure of the refrigeration equipment;

[0017] Figure 2 This is a flowchart illustrating the steps of a fault indication method provided in one embodiment of the present invention;

[0018] Figure 3 A flowchart illustrating the steps of a fault indication method provided in another embodiment of the present invention;

[0019] Figure 4 A cross-sectional view of a refrigeration system with a fruit and vegetable box and a variable temperature compartment is shown.

[0020] Figure 5 This is a schematic diagram of the functional modules of the refrigeration air duct abnormality judgment device provided in this embodiment.

[0021] Reference numerals: Refrigerated air duct 10; splicing surface 11; air supply channel 12; evaporation chamber 13; variable temperature compartment 14; variable temperature sensor 15; fruit and vegetable box 16. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] It should be noted that, where there is no conflict, different features in the embodiments of the present invention can be combined with each other.

[0027] Taking a single-system air-cooled refrigerator as an example, the refrigeration equipment includes a refrigerator compartment and an evaporation chamber 13. There is an air supply channel 12 between the refrigerator compartment and the evaporation chamber 13 for transporting gas. The evaporation chamber 13 is used to allow the refrigerant to evaporate and absorb heat, thereby realizing heat exchange within the refrigeration equipment and thus reducing the internal temperature of the refrigeration equipment.

[0028] During refrigeration, the refrigeration fan in the refrigeration equipment sends the cold air from the evaporation chamber 13 into the refrigerator compartment through the air supply duct 12. The refrigerator compartment exchanges heat with the cold air through the cold air duct 10, thereby achieving the refrigeration effect of the refrigerator compartment. After the cold air completes the heat exchange in the refrigerator compartment, it returns to the evaporation chamber 13.

[0029] However, since the evaporator chamber 13 is located in the freezer compartment, due to the structural limitations of the refrigeration equipment, a splicing surface 11 must be installed between the refrigeration air duct 10 and the air supply duct 12. For details, please refer to [link / reference needed]. Figure 1 , Figure 1 This is a side sectional view of the internal structure of the refrigeration equipment. When the joint surface 11 is not properly sealed, cold air will enter the bottom of the refrigerator compartment through the joint gap, causing the temperature at the bottom of the refrigerator compartment to be too low. It will also cause abnormal cold air content in the refrigeration air duct 10, thus preventing the refrigerator compartment from cooling properly.

[0030] In order to solve the technical problems mentioned in the background and the aforementioned issues, the inventors have innovatively designed the following technical solutions, and the specific implementation of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Please see Figure 2 , Figure 2 This is a flowchart illustrating the steps of a fault indication method provided in an embodiment of the present invention. The method is applied to... Figure 5The illustrated device 100 is for detecting abnormalities in the refrigerated air duct. This device 100 is used in the control module of a refrigeration system. The refrigeration system also includes a refrigeration compartment, an evaporation chamber, and an ambient temperature sensor. A refrigerated air duct for gas transmission is provided between the refrigeration compartment and the evaporation chamber. The refrigeration compartment includes a variable temperature compartment and a variable temperature sensor installed in the variable temperature compartment to measure its temperature. The ambient temperature sensor is located outside the refrigeration compartment. The control module is electrically connected to the ambient temperature sensor and the variable temperature sensor. The control module can be the main control module of the refrigeration system or a control module within the refrigeration system used to detect abnormalities in the refrigerated air duct; no specific limitation is made here. The variable temperature compartment refers to an independent compartment in the refrigeration system with adjustable temperature; the user can customize the temperature range of the variable temperature compartment according to their needs. The ambient temperature sensor can be installed inside the hinged cover at the top of the refrigeration compartment or in the middle of the refrigeration compartment; no specific limitation is made here. The model of the ambient temperature sensor can be the same as or different from the model of the variable temperature sensor; no specific limitation is made here regarding the models of the ambient temperature sensor and the variable temperature sensor.

[0032] The following will address Figure 2 The process shown is explained in detail, and the fault indication method may specifically include the following steps:

[0033] Step S110: Detect the working status of the refrigeration equipment within a preset time period, wherein the working status includes normal start-stop status and continuous non-cooling status.

[0034] The refrigeration equipment can be a refrigerator, a freezer, or any other machine used for refrigeration; no specific restrictions are made here.

[0035] Furthermore, the normal start-stop state refers to the refrigeration equipment operating under the set cooling temperature limit. When the cooling temperature reaches the set minimum temperature, cooling will stop. After the internal temperature of the refrigeration equipment stops cooling, it will slowly warm up due to the influence of the external ambient temperature. When the operating temperature of the refrigeration equipment is reached, the refrigeration equipment will restart its operation until the cooling temperature reaches the set minimum temperature.

[0036] A state of continuous non-cooling refers to a state where the refrigeration equipment has other cold sources or the outside temperature is not high, so the refrigeration equipment does not need to cool, or a state where the refrigeration equipment is malfunctioning and unable to cool.

[0037] In this embodiment of the invention, the detection method for the working status of the refrigeration equipment can be to obtain the number of times the refrigeration equipment starts and stops. If the number of starts and stops reaches a preset number within a preset time period, the working status of the refrigeration equipment can be determined to be a normal start-stop state. The preset number of starts and stops can be a pre-defined number or a custom setting; no specific limitation is made here. If the refrigeration equipment remains in a stopped state within a preset time period, the working status of the refrigeration equipment can be determined to be a continuously non-cooling state. Another detection method is to obtain the temperature data of the refrigeration equipment. If the temperature of the refrigeration equipment maintains a regular cooling and regular warming pattern within a preset time period, the working status of the refrigeration equipment can be determined to be a normal start-stop state. If the temperature of the refrigeration equipment continuously rises within a preset time period, the working status of the refrigeration equipment can be determined to be a continuously non-cooling state. No specific limitation is made here regarding the detection method for the working status of the refrigeration equipment. It should be noted that, to ensure the accuracy of the refrigeration equipment status detected by the control module, the information collected by the control module should be collected after the refrigeration equipment has been powered on and running for a period of time.

[0038] Step S120: When the working state of the refrigeration equipment is detected to be normal start-stop state, obtain the average refrigeration time of the variable temperature chamber within a preset time period.

[0039] In this embodiment of the invention, the average cooling time can be the entropy value between the total cooling time and the number of cooling cycles within a preset time period. Alternatively, the average cooling time can be obtained by averaging the data interval with the highest proportion in the normal distribution of cooling times within the preset time period. The preset proportion can be 80% or 90%, and the specific method for determining the average cooling time and the preset proportion are not limited here.

[0040] Step S130: Determine whether the status of the refrigerated air duct is abnormal based on the average cooling time and the average cooling time threshold range.

[0041] The average cooling time threshold range can be a threshold range set within the cooling device, or it can be a threshold range obtained from a cloud database. Specifically, the threshold range in the cloud database is determined by calculating the average cooling time of multiple sample cooling devices identical to the original device under the same environmental conditions, and then using the minimum and maximum values ​​corresponding to the average cooling time of the sample cooling devices. Alternatively, the average cooling time threshold range can be determined by first determining the average value corresponding to the average cooling time of the sample cooling devices, and then using a preset range and the average value to determine the average cooling time threshold range. No specific limitations are imposed on the method for determining the average cooling time threshold range here.

[0042] Step S140: When the working state of the refrigeration equipment is detected to be continuously non-cooling, the stop point temperature, ambient temperature and variable temperature chamber temperature are obtained.

[0043] Among them, the shutdown point temperature is the temperature when the refrigeration equipment last stopped working, the ambient temperature is the temperature of the variable temperature chamber outside the refrigeration equipment collected by the ambient temperature sensor, and the variable temperature chamber temperature is the current temperature of the variable temperature chamber collected by the variable temperature sensor.

[0044] Step S150: Determine whether the condition of the refrigerated air duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature chamber temperature.

[0045] In this embodiment of the invention, determining whether the state of the refrigerated air duct is abnormal can be achieved by first obtaining the temperature difference between the ambient temperature and the shutdown point temperature, and the temperature difference between the ambient temperature and the variable temperature compartment temperature, and then determining whether the state of the refrigerated air duct is abnormal based on the temperature differences. Alternatively, it can be determined whether the ambient temperature is lower than a preset ambient temperature. If the ambient temperature is greater than or equal to the preset ambient temperature, and the variable temperature compartment temperature is lower than the shutdown point temperature, it can be determined that there are other cold sources supplying cooling to the variable temperature compartment, thus determining that the state of the refrigerated air duct is abnormal. Conversely, if the variable temperature compartment temperature is greater than or equal to the shutdown point temperature, it can be determined that after the refrigeration equipment stops cooling, the variable temperature compartment recovers due to the influence of the ambient temperature. At this time, there are no other cold sources supplying cooling to the variable temperature compartment, thus determining that the state of the refrigerated air duct is normal. If the ambient temperature is lower than the preset ambient temperature, and the variable temperature compartment temperature is lower than the shutdown point temperature, then the variable temperature compartment temperature can be affected by the ambient temperature or by other cold sources. At this point, the temperature of the variable temperature compartment can be continuously monitored. If, during monitoring, the temperature of the variable temperature compartment is greater than or equal to the shutdown point temperature, it indicates that the variable temperature compartment is recovering normally, thus confirming that the refrigerated air duct is in normal condition. If, during monitoring, the temperature of the variable temperature compartment remains lower than the shutdown point temperature, it indicates that the variable temperature compartment is affected by other cold sources, thus confirming that the refrigerated air duct is in an abnormal condition. This document does not specify the exact method for determining whether the refrigerated air duct is in an abnormal condition based on the shutdown point temperature, ambient temperature, and variable temperature compartment temperature.

[0046] The solution provided by this invention uses the average cooling time of the refrigeration equipment within a preset time period, the ambient temperature, the temperature of the variable temperature compartment, and the temperature at the shutdown point to jointly determine whether there is any abnormality in the state of the cold air duct in the refrigeration equipment, and then to determine whether there is poor contact at the splicing surfaces of the refrigeration equipment. This allows for timely repair of refrigeration equipment with poor contact at the contact surfaces, thereby improving the user experience.

[0047] Please see Figure 3 , Figure 3 This is a flowchart illustrating the steps of a fault indication method provided in another embodiment of the present invention. The following will focus on... Figure 3The process shown is explained in detail, and the fault indication method may specifically include the following steps:

[0048] Step S201: Detect the working status of the refrigeration equipment within a preset time period, wherein the working status includes normal start-stop status and continuous non-cooling status.

[0049] Step S202: When the working state of the refrigeration equipment is detected to be normal start-stop state, obtain the average refrigeration time of the variable temperature chamber within a preset time period.

[0050] For a detailed explanation of steps S201 to S202, please refer to the detailed explanation of steps S110 to S120, which will not be repeated here.

[0051] Step S203: Obtain the average cooling time threshold range. The average cooling time threshold range is obtained by testing multiple sample cooling devices identical to the cooling device in the same environment.

[0052] The average cooling time threshold range can be determined by first testing multiple sample cooling devices identical to the original cooling device in the same environment and recording the corresponding average cooling time. The threshold range can then be determined based on the average cooling time of the sample cooling devices. The average cooling time of the sample cooling devices can be obtained from a cloud database, and the threshold range can be determined based on this obtained average cooling time.

[0053] The average cooling time threshold range can be determined by first setting the average cooling time threshold based on the average cooling time of the sample cooling devices, and then determining the average cooling time threshold range based on a preset fluctuation value. Alternatively, the average cooling time threshold range can be determined by directly setting the minimum and maximum average cooling times of the sample cooling devices in the cloud database as the average cooling time threshold range. No specific limitations are placed on the method for determining the average cooling time threshold range here.

[0054] Step S204: If the average cooling time is greater than the first duration threshold, then the state of the refrigeration air duct is determined to be normal.

[0055] The first duration threshold is the upper limit of the average cooling duration threshold range. When the average cooling duration exceeds the first duration threshold, there may be a heat load in the refrigeration equipment, thus confirming that the refrigeration equipment is continuously operating. In this case, it can be determined that the refrigerated air duct is continuously operating, and therefore the state of the refrigerated air duct is normal.

[0056] Step S205: If the average cooling time is greater than the second duration threshold and the average cooling time is less than or equal to the first duration threshold, then obtain the average operating rate of the variable temperature chamber within the preset duration.

[0057] Step S206: Determine whether the condition of the refrigerated air duct is abnormal based on the average operating rate and the average operating rate threshold range.

[0058] The second duration threshold is the lower limit of the average cooling duration threshold range. The operating rate refers to the efficiency of a single operation within the refrigeration equipment. The operating rate is the ratio of the current running time to the total start-stop time, which is the sum of the current running time and the shutdown time. The average operating rate is the average of multiple operating rates for the variable temperature compartment within a preset duration.

[0059] In this embodiment of the invention, when the average cooling time is greater than a second time threshold and less than or equal to a first time threshold, the average cooling time is determined to be within the normal range. In this case, the status of the refrigeration duct can be determined using the average operating rate of the refrigeration equipment. One method is that if the average operating rate is within the average operating rate threshold range, the refrigeration duct is considered normal; if the average operating rate is less than the lower limit of the average operating rate threshold range or greater than the average operating rate threshold range, the refrigeration duct is considered abnormal. Another method is that if the average operating rate is less than the lower limit of the average operating rate threshold range, the refrigeration duct is considered abnormal; if the average operating rate is greater than the lower limit of the average operating rate threshold range, further start-stop detection of the refrigeration equipment is performed to determine whether the refrigeration duct is abnormal.

[0060] In one embodiment of the present invention, the average operating rate threshold range includes a lower limit threshold for the average operating rate. The step of determining whether the refrigerated air duct is abnormal based on the average operating rate and the average operating rate threshold range includes: if the average operating rate is less than or equal to the lower limit threshold, the state of the refrigerated air duct is determined to be abnormal. If the operating rate ratio is greater than the lower limit threshold, a start / stop command is sent to the refrigeration equipment, wherein the start / stop command includes a preset number of start / stop cycles. After the refrigeration equipment performs the preset number of start / stop cycles based on the start / stop command, the low-temperature duration and the total start / stop duration are obtained, wherein the low-temperature duration is the total duration corresponding to the temperature of the variable temperature compartment being lower than the shutdown point temperature within the preset number of start / stop cycles, and the total start / stop duration is the total duration corresponding to the refrigeration equipment completing the preset number of start / stop cycles. The state of the refrigerated air duct is determined to be abnormal based on the low-temperature duration and the total start / stop duration.

[0061] In this embodiment, when the status of the refrigeration duct cannot be determined based on the average operating rate and the average operating rate threshold range, start / stop commands can continue to be sent to the refrigeration equipment to enable the refrigeration equipment to start and stop according to the preset number of start / stop cycles in the start / stop commands. After the refrigeration equipment starts and stops according to the start / stop refrigeration, the variable temperature chamber temperature and the shutdown point temperature when the refrigeration equipment stops working are obtained during each start / stop process. This allows the acquisition of the duration of the low temperature (the duration the variable temperature chamber temperature is lower than the shutdown point temperature within the preset number of start / stop cycles). When the status of the refrigeration duct is abnormal, the cold air in the refrigeration duct cannot normally supply cooling to the refrigerator compartment. Therefore, the low temperature duration may not exist in the refrigerator compartment, or the low temperature duration may be very short. Conversely, when the low temperature duration meets the normal standard, the status of the refrigeration duct can be determined to be normal. The standard can be that the low temperature duration meets a preset ratio range from the total start / stop duration, or the difference between the low temperature duration and the total start / stop duration meets a preset difference range. Here, the normal standard, preset ratio range, and preset difference range are not specifically limited.

[0062] In one specific embodiment of the present invention, the step of determining whether the state of the refrigerated air duct is abnormal based on the low-temperature duration and the total start-stop duration includes: obtaining a low-temperature duration threshold corresponding to the low-temperature duration based on the total start-stop duration. If the low-temperature duration is less than or equal to the low-temperature duration threshold, the state of the refrigerated air duct is determined to be normal. If the low-temperature duration is greater than the low-temperature duration threshold, the state of the refrigerated air duct is determined to be abnormal.

[0063] The low-temperature duration threshold can be determined by the total start-stop time within a preset ratio, or it can be customized based on the total start-stop time. No specific limit is set for the low-temperature duration threshold here.

[0064] In this embodiment, when the low-temperature duration is less than or equal to the low-temperature duration threshold, it indicates that the refrigeration equipment has recovered its temperature due to environmental influences after shutdown, thus confirming that there are no other cold sources within the refrigeration equipment providing cooling for the variable temperature compartment. When the low-temperature duration exceeds the low-temperature duration threshold, it indicates that there are other cold sources within the refrigeration equipment providing cooling for the variable temperature compartment, thus confirming that the state of the refrigerated air duct is abnormal.

[0065] Step S207: If the average cooling time is less than the second time threshold, obtain the temperature of the variable temperature chamber and the temperature at the shutdown point.

[0066] Step S208: Determine whether the condition of the refrigerated air duct is abnormal based on the temperature of the variable temperature chamber and the temperature at the shutdown point.

[0067] In one embodiment of the present invention, the step of determining whether the state of the refrigerated air duct is abnormal based on the variable temperature chamber temperature and the shutdown point temperature includes: obtaining the lowest temperature of the variable temperature chamber when the refrigeration equipment is not cooling and the lowest temperature of the shutdown point of the variable temperature chamber after the refrigeration equipment has stopped. If the lowest temperature of the variable temperature chamber is greater than or equal to the lowest temperature of the shutdown point, the state of the refrigerated air duct is determined to be normal. If the lowest temperature of the variable temperature chamber is less than the lowest temperature of the shutdown point, the state of the refrigerated air duct is determined to be abnormal.

[0068] Step S209: When the working state of the refrigeration equipment is detected to be continuously non-cooling, the stop point temperature, ambient temperature and variable temperature chamber temperature are obtained.

[0069] Step S210: If the duration for which the temperature of the variable temperature chamber is lower than the temperature at the shutdown point is greater than or equal to the first preset duration, and the ambient temperature is greater than or equal to the preset ambient temperature, then the state of the refrigerated air duct is determined to be abnormal.

[0070] In this embodiment of the invention, when the refrigeration duct is in normal condition, the temperature of the variable temperature chamber is lower than the shutdown point temperature, and the ambient temperature is higher than the preset ambient temperature. The variable temperature chamber will then heat up according to the ambient temperature. However, if the duration for which the temperature of the variable temperature chamber is lower than the shutdown point temperature is greater than or equal to a first preset duration, and the ambient temperature is greater than or equal to the preset ambient temperature, it indicates that there are other cold sources in the variable temperature chamber to maintain its low temperature. In this case, it can be determined that the refrigeration duct is in an abnormal state.

[0071] Step S211: If the duration for which the temperature of the variable chamber is lower than the temperature at the shutdown point is greater than or equal to the first preset duration, and the ambient temperature is lower than the preset ambient temperature, then the temperature of the variable chamber will continue to be detected for the second preset duration.

[0072] Step S212: If the temperature of the variable temperature chamber is lower than the temperature at the shutdown point within the second preset duration, then the state of the refrigerated air duct is determined to be abnormal.

[0073] Step S213: If the temperature of the variable chamber is greater than or equal to the temperature at the shutdown point within the second preset duration, and the temperature of the variable chamber rises, then the state of the refrigeration air duct is determined to be normal.

[0074] In this embodiment of the invention, when the temperature of the variable-temperature chamber is lower than the shutdown point temperature for a duration greater than or equal to a first preset duration, and the ambient temperature is lower than a preset ambient temperature, it is impossible to determine whether the temperature of the variable-temperature chamber is kept lower than the shutdown point temperature due to the influence of the ambient temperature, or whether it is due to cold leakage caused by an abnormality in the refrigeration air duct, providing other cold sources for the variable-temperature chamber. Therefore, the relationship between the temperature of the variable-temperature chamber and the shutdown point temperature continues to be monitored for a second preset duration. If the temperature of the variable-temperature chamber is greater than or equal to the shutdown point temperature within the second preset duration, it indicates that the temperature of the variable-temperature chamber is recovering, that is, there is no other cold source to maintain the low temperature of the variable-temperature chamber, and it can be determined that the state of the refrigeration air duct is normal. Conversely, if the temperature of the variable-temperature chamber is continuously lower than the shutdown point temperature within the second preset duration, it can be determined that there are other cold sources to maintain the low temperature of the variable-temperature chamber, and thus it can be determined that the state of the refrigeration air duct is abnormal.

[0075] In some embodiments, the refrigeration equipment includes a fruit and vegetable box and a fruit and vegetable temperature sensor for monitoring the temperature of the fruit and vegetable box. The fruit and vegetable temperature sensor is electrically connected to a control module and includes: acquiring the temperature of the fruit and vegetable box, wherein the fruit and vegetable box temperature is the current temperature of the fruit and vegetable box monitored by the fruit and vegetable temperature sensor. The step of determining whether the state of the refrigeration air duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature compartment temperature further includes: determining whether the state of the refrigeration air duct is abnormal based on the shutdown point temperature, ambient temperature, variable temperature compartment temperature, and fruit and vegetable box temperature.

[0076] In the embodiments of the present invention, please refer to Figure 4 , Figure 4 A cross-sectional view of a refrigeration unit equipped with a fruit and vegetable drawer and a variable temperature compartment is shown. The refrigeration unit also includes a fruit and vegetable drawer 16. To improve the accuracy of detecting the status of the refrigerated air duct 10, the temperature of the fruit and vegetable drawer detected by the fruit and vegetable temperature sensor and the temperature of the variable temperature compartment 14 detected by the variable temperature sensor 15 can be combined to determine whether the status of the refrigerated air duct 10 is abnormal. The fruit and vegetable temperature sensor can be located on the side or below the fruit and vegetable drawer 16; the location of the sensor is not limited here. If both the temperature of the fruit and vegetable drawer and the temperature of the variable temperature compartment are lower than the stop point temperature, and the ambient temperature is greater than or equal to the preset ambient temperature, the status of the refrigerated air duct 10 can be determined to be abnormal. If both the temperature of the fruit and vegetable drawer and the temperature of the variable temperature compartment are lower than the stop point temperature, and the ambient temperature is lower than the preset ambient temperature, the relationship between the temperature of the variable temperature compartment, the temperature of the fruit and vegetable drawer, and the stop point temperature is continuously monitored. If the temperature of the fruit and vegetable box and the variable temperature compartment remain lower than the shutdown point temperature, it is determined that there is another cold source cooling the fruit and vegetable box 16 and the variable temperature compartment 14, thus confirming that the state of the refrigerated air duct 10 is abnormal. If the temperature of the fruit and vegetable box is greater than or equal to the shutdown point temperature, or the temperature of the variable temperature compartment is greater than or equal to the shutdown point temperature, or the temperature of both the variable temperature compartment and the fruit and vegetable box is greater than or equal to the shutdown point temperature, then the state of the refrigerated air duct 11 is determined to be normal.

[0077] In other embodiments, when the refrigeration equipment is only equipped with a fruit and vegetable box, the state of the refrigeration duct in the refrigeration equipment can be determined based on the temperature of the fruit and vegetable box, the temperature at the stop point, the ambient temperature, and the average refrigeration time of the fruit and vegetable box. That is, the temperature of the fruit and vegetable box is used as the temperature of the variable temperature compartment. For a detailed explanation, please refer to the detailed explanation in the foregoing embodiments, which will not be repeated here.

[0078] Step S214: When it is determined that the state of the refrigerated air duct is abnormal, an alarm command is sent to the alarm module so that the alarm module can issue an alarm for the refrigerated air duct in the abnormal state.

[0079] The alarm module may include one or more of indicator lights, display modules, and voice modules. Alarm commands may be light flashing commands, display commands, and voice commands. Alarm commands correspond to alarm modules, and no specific limitations are made here regarding alarm modules and alarm commands.

[0080] In this embodiment of the invention, when it is determined that the state of the refrigerated air duct is abnormal, a corresponding alarm command is sent to the alarm module so that the alarm module can issue an alarm for the refrigerated air duct in the abnormal state according to the alarm command. For example, taking the alarm module as a voice module, when it is determined that the state of the refrigerated air duct is abnormal, an alarm command is sent to the alarm module, and the alarm module will announce "There is an abnormality in the refrigerated air duct" according to the alarm command.

[0081] In the specific implementation process, a refrigerator is used as an example of a refrigeration device. After the refrigerator is powered on and running, wait until the temperature sensor on the variable temperature compartment operates within the on / off range of the set temperature control setting three times consecutively. When the variable temperature compartment resumes cooling, record the cooling time t and the operating rate η. The operating rate η is the single cooling time / (single cooling time + downtime). After recording for 3 consecutive times, output the average cooling time t1 and the operating rate η1. Retrieve the average cooling time threshold t0 and the average operating rate threshold η0 of refrigerators of the same model and set temperature control setting from the cloud server for comparison. t0 is obtained by averaging the data interval with the highest proportion of the normal distribution of the average cooling time of all variable temperature compartments uploaded to the cloud. η0 is the lowest value among the data intervals with the highest proportion of the normal distribution of the average cooling time of all variable temperature compartments uploaded to the cloud.

[0082] If the variable temperature chamber continues to fail to cool, and the temperature sensor temperature T B The temperature remains below the shutdown point T. t If more than 3 hours have passed and the ambient temperature is ≥12℃, it is determined that the temperature fluctuation has not been affected by the ambient temperature and has not recovered. This indicates an abnormality in the refrigerated air duct's condition. The control module will then send an alarm to the cloud. Inspection may require replacing the sealing foam or the main body of the air duct. If the ambient temperature is <12℃, continue monitoring for 3 hours. If T...B ≥T t And T B A sustained increase in temperature indicates that the refrigerated air duct is functioning normally. If T... B Still below T t If the condition is abnormal, the control module will control the alarm module to send an alarm to the cloud.

[0083] If the variable temperature chamber operates normally and t1 ≤ 0.8t0, determine the temperature T of the variable temperature sensor. B and the shutdown point T of the variable temperature greenhouse t Wherein, 0.8t0 is the lower limit of the average cooling time threshold range determined by the average cooling time threshold t0.

[0084] When the variable temperature compartment is not refrigerated, the lowest temperature T in the variable temperature compartment is... Bmin ≥ Minimum temperature at shutdown point T t The refrigerator is considered to be operating normally at -0.5℃. Among them, T... t -0.5℃ is the lowest temperature at which the refrigeration equipment stops operating after shutdown. When the variable temperature compartment is not refrigerating, T... Bmin <T t At -0.5℃, the refrigerated air duct is confirmed to be in an abnormal state, and the control module controls the alarm module to send an alarm to the cloud.

[0085] If the variable temperature compartment operates normally and 0.8t0 < t1 ≤ 1.15t0, the ratio θ1 = η1 / η0 of the average operating rate η1 and the average operating rate threshold η0 is determined. Here, 1.15t0 is the upper limit of the average cooling time threshold range determined based on the average cooling time threshold t0. If θ1 ≤ 0.85, i.e., η1 ≤ 0.85η0, the state of the refrigerated air duct is determined to be abnormal, and the control module controls the alarm module to send an alarm to the cloud. Here, 0.85η0 is the lower limit of the average operating rate threshold determined based on the average operating rate η0. If θ1 > 0.85, the refrigeration equipment operation is monitored for three more cycles, and the temperature T from the variable temperature sensor is obtained. B Below the shutdown point T of the variable temperature room t The low-temperature duration t2 and the total start-stop duration t0' of the three cycles are used. If t2 ≤ 0.1t0', the refrigerator is considered to be operating normally. If t2 > 0.1t0', the state of the refrigeration air duct is determined to be abnormal, and the control module controls the alarm module to send an alarm to the cloud. Here, 0.1t0' is the low-temperature duration threshold determined based on the total start-stop duration t0'.

[0086] If the variable temperature chamber operates normally and t1 > 1.15t0, it can be determined that the variable temperature chamber has a heat load, and thus the state of the cold storage air duct is normal.

[0087] The solution provided by this invention determines the average cooling time threshold range by using multiple sample refrigeration devices identical to the refrigeration equipment under the same environment. The sample refrigeration devices provide data support for the detection of the refrigeration equipment, and can more effectively determine whether the status of the refrigeration equipment's cold air duct is abnormal based on the average cooling time threshold range, average cooling time, ambient temperature, variable temperature chamber temperature, and shutdown point temperature, thereby improving the user experience.

[0088] Based on the same inventive concept, please refer to Figure 5 , Figure 5 This is a schematic diagram of the functional modules of a refrigerated air duct anomaly detection device 100 provided in this embodiment. This embodiment can divide the refrigerated air duct anomaly detection device 100 into functional modules according to the above method embodiment. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this embodiment is illustrative and only represents a logical functional division; actual implementation may have other division methods. For example, in the case of dividing each functional module according to its own function... Figure 5 The illustrated refrigerated air duct anomaly detection device 100 is merely a schematic diagram. It is applied to a control module within a refrigeration system. The refrigeration system also includes a refrigeration compartment, an evaporation chamber, and an ambient temperature sensor. A refrigerated air duct for gas transmission is provided between the refrigeration compartment and the evaporation chamber. The refrigeration compartment includes a variable temperature compartment and a variable temperature sensor located within it for measuring its temperature. The ambient temperature sensor is located outside the refrigeration compartment. The control module is electrically connected to both the ambient temperature sensor and the variable temperature sensor. The functions of each module in this refrigerated air duct anomaly detection device will be described in detail below.

[0089] In this embodiment, the working status detection module 110 can be used to execute... Figure 1 For a detailed description of the working status detection module 110, see the description of step S110 shown.

[0090] In this embodiment, the average cooling time acquisition module 120 can be used to perform... Figure 1 For a detailed description of step S120, please refer to the description of step S120.

[0091] In this embodiment, the first state determination module 130 can be used to execute... Figure 1 For a detailed description of the first state determination module 130 shown in step S130, please refer to the description of step S130.

[0092] Temperature acquisition module 140, in this embodiment, temperature acquisition module 140 can be used to perform... Figure 1 For a detailed description of the temperature acquisition module 140 shown in step S140, please refer to the description of step S140.

[0093] In this embodiment, the second state determination module 150 can be used to execute... Figure 1 For a detailed description of the second state determination module 150, see the description of step S150 shown.

[0094] Furthermore, embodiments of the present invention also provide a computer storage medium storing an executable program, which, when executed, can be used to implement the method for judging abnormalities in the refrigerated air duct provided in the above-described method embodiments.

[0095] Of course, the computer storage medium containing an executable program provided in the embodiments of the present invention is not limited to the above-described method operations, but can also perform related operations in the method for judging abnormalities in refrigerated air ducts provided in any embodiment of the present invention.

[0096] In summary, this invention provides a method and apparatus for determining refrigerated air duct anomalies. The method is applied to a computer device within a refrigerated air duct anomaly determination system. First, motion sensors in the system detect the motion information of the mechanical equipment at preset time intervals. Then, based on the motion information, the corresponding motion state is determined. Next, two adjacent motion states are compared. If two adjacent motion states are inconsistent, the number of out-of-limit movements is accumulated. When the number of out-of-limit movements exceeds a preset limit, the motion states of two adjacent movements within the following timing period are detected. If they are inconsistent, the accumulated trigger duration is accumulated. When the accumulated trigger duration exceeds the delayed trigger duration, an emergency stop signal is triggered. This method can promptly capture out-of-limit vibrations of the mechanical equipment and issue an emergency stop signal, preventing vibration instability. It also provides a trigger delay setting to avoid accidental triggering during normal equipment operation.

[0097] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, apparatus, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0098] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, disclosure, and appended claims in carrying out the claimed invention. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for determining abnormalities in a refrigerated air duct, characterized in that, A control module is applied in a refrigeration device, the refrigeration device further including a cold storage compartment, an evaporation chamber, and an ambient temperature sensor. A cold air duct for gas transmission is provided between the cold storage compartment and the evaporation chamber. The cold storage compartment includes a variable temperature compartment and a variable temperature sensor disposed in the variable temperature compartment for measuring the temperature of the variable temperature compartment. The ambient temperature sensor is disposed outside the cold storage compartment. The control module is electrically connected to the ambient temperature sensor and the variable temperature sensor. The method includes: The working status of the refrigeration equipment is detected within a preset time period, wherein the working status includes normal start-stop status and continuous non-cooling status; When the working state of the refrigeration equipment is detected to be normal start-stop state, the average refrigeration time, average refrigeration time threshold range, average operating rate, average operating rate threshold range, temperature of the variable temperature chamber and temperature at the shutdown point are obtained within a preset time period. Based on the average cooling time, the average cooling time threshold range, the average operating rate, the average operating rate threshold range, the variable temperature chamber temperature, and the shutdown point temperature, determine whether the state of the refrigerated air duct is abnormal. When the refrigeration equipment is detected to be in a state of continuous non-cooling, the shutdown point temperature, ambient temperature, and variable temperature chamber temperature are acquired. The shutdown point temperature is the variable temperature chamber temperature when the refrigeration equipment last stopped working. The ambient temperature is the temperature outside the refrigerator compartment collected by the ambient temperature sensor. The variable temperature chamber temperature is the current temperature of the variable temperature chamber collected by the variable temperature sensor. Based on the shutdown point temperature, ambient temperature, and variable temperature chamber temperature, determine whether the condition of the refrigerated air duct is abnormal.

2. The method for determining abnormalities in a cold storage air duct as described in claim 1, characterized in that, The average cooling time threshold range includes a first duration threshold and a second duration threshold. The first duration threshold is the upper limit of the average cooling time threshold range, and the second duration threshold is the lower limit of the average cooling time threshold range. The step of determining whether the state of the refrigerated air duct is abnormal based on the average cooling time, the average cooling time threshold range, the average operating rate, the average operating rate threshold range, the variable temperature compartment temperature, and the shutdown point temperature includes: If the average cooling time is greater than the first time threshold, then the state of the refrigerated air duct is determined to be normal; If the average cooling time is greater than the second duration threshold and the average cooling time is less than or equal to the first duration threshold, then the average operating rate of the variable temperature chamber within the preset duration is obtained. Based on the average operating rate and the average operating rate threshold range, determine whether the state of the refrigerated air duct is abnormal. If the average cooling time is less than the second time threshold, obtain the temperature of the variable temperature chamber and the temperature at the shutdown point; Based on the temperature of the variable temperature chamber and the temperature at the shutdown point, determine whether the condition of the refrigerated air duct is abnormal.

3. The method for determining abnormalities in a cold storage air duct as described in claim 2, characterized in that, The average operating rate threshold range includes a lower threshold for the average operating rate. The step of determining whether the refrigerated air duct is abnormal based on the average operating rate and the average operating rate threshold range includes: If the average operating rate is less than or equal to the lower limit threshold of the average operating rate, then the state of the refrigerated air duct is determined to be abnormal. If the average operating rate is greater than the lower limit threshold of the average operating rate, a start / stop command is sent to the refrigeration equipment, wherein the start / stop command includes a preset number of start / stop cycles; After the refrigeration equipment performs a preset number of start-stop operations based on the start-stop command, the low-temperature duration and the total start-stop duration are obtained. The low-temperature duration is the total duration during which the temperature of the variable temperature chamber is lower than the shutdown point temperature within the preset number of start-stop operations, and the total start-stop duration is the total duration during which the refrigeration equipment completes the preset number of start-stop operations. Based on the duration of the low temperature and the total start-stop time, determine whether the state of the refrigerated air duct is abnormal.

4. The method for determining abnormalities in a cold storage air duct as described in claim 3, characterized in that, The step of determining whether the state of the refrigerated air duct is abnormal based on the low temperature duration and the total start-stop duration includes: Based on the total start-stop time, obtain the low-temperature duration threshold corresponding to the low-temperature duration; If the low temperature duration is less than or equal to the low temperature duration threshold, then the state of the refrigerated air duct is determined to be normal. If the low temperature duration exceeds the low temperature duration threshold, the state of the refrigerated air duct is determined to be abnormal.

5. The method for determining abnormalities in a cold storage air duct as described in claim 2, characterized in that, The step of determining whether the condition of the refrigerated air duct is abnormal based on the temperature of the variable temperature chamber and the temperature at the shutdown point includes: Get the lowest temperature of the variable temperature chamber when the refrigeration equipment is not cooling under normal start-stop conditions, and the lowest temperature of the variable temperature chamber at the shutdown point after the refrigeration equipment is shut down. If the lowest temperature of the variable temperature chamber is greater than or equal to the lowest temperature of the shutdown point, then the state of the refrigeration air duct is determined to be normal. If the lowest temperature of the variable temperature chamber is lower than the lowest temperature of the shutdown point, then the state of the refrigerated air duct is determined to be abnormal.

6. The method for determining abnormalities in a cold storage air duct as described in claim 1, characterized in that, The step of determining whether the condition of the refrigerated air duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature compartment temperature includes: If the duration for which the temperature of the variable temperature chamber is lower than the temperature at the shutdown point is greater than or equal to a first preset duration, and the ambient temperature is greater than or equal to a preset ambient temperature, then the state of the refrigerated air duct is determined to be abnormal. If the duration for which the temperature of the variable temperature chamber is lower than the temperature at the shutdown point is greater than or equal to the first preset duration, and the ambient temperature is lower than the preset ambient temperature, then the temperature of the variable temperature chamber will continue to be detected for the second preset duration. If the temperature of the variable temperature chamber is lower than the temperature at the shutdown point within the second preset duration, then the state of the refrigerated air duct is determined to be abnormal. If the temperature of the variable temperature chamber is greater than or equal to the temperature at the shutdown point within the second preset duration, and the temperature of the variable temperature chamber rises, then the state of the refrigerated air duct is determined to be normal.

7. The method for determining abnormalities in a cold storage air duct as described in any one of claims 1-6, characterized in that, Before the step of determining whether the state of the refrigerated air duct is abnormal based on the average cooling time, the average cooling time threshold range, the average operating rate, the average operating rate threshold range, the variable temperature compartment temperature, and the shutdown point temperature, the method further includes: The average cooling time threshold range is obtained by testing multiple sample cooling devices identical to the cooling device in the same environment.

8. The method for determining abnormalities in a cold storage air duct as described in any one of claims 1-6, characterized in that, The refrigeration equipment also includes an alarm module. After the step of determining whether the state of the refrigerated air duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature compartment temperature, the method further includes: When the state of the refrigerated air duct is determined to be abnormal, an alarm command is sent to the alarm module so that the alarm module can issue an alarm for the refrigerated air duct in the abnormal state.

9. The method for determining abnormalities in a cold storage air duct as described in any one of claims 1-6, characterized in that, The refrigeration device includes a fruit and vegetable box and a fruit and vegetable temperature sensor for monitoring the temperature of the fruit and vegetable box. The fruit and vegetable temperature sensor is electrically connected to the control module and includes: The temperature of the fruit and vegetable box is obtained, which is the current temperature of the fruit and vegetable box as monitored by the fruit and vegetable temperature sensor. The step of determining whether the state of the refrigerated air duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature compartment temperature further includes: Based on the temperature at the shutdown point, the ambient temperature, the temperature of the variable temperature compartment, and the temperature of the fruit and vegetable box, determine whether the condition of the refrigerated air duct is abnormal.

10. A device for determining abnormalities in a refrigerated air duct, characterized in that, A control module for use in refrigeration equipment, the refrigeration equipment further including a cold storage compartment, an evaporation chamber, and an ambient temperature sensor, wherein a cold air duct for gas transmission is provided between the cold storage compartment and the evaporation chamber, the cold storage compartment includes a variable temperature compartment and a variable temperature sensor disposed in the variable temperature compartment for measuring the temperature of the variable temperature compartment, the ambient temperature sensor is disposed outside the cold storage compartment, and the control module is electrically connected to the ambient temperature sensor and the variable temperature sensor, the device comprising: The working status detection module is used to detect the working status of the refrigeration equipment within a preset time period, wherein the working status includes normal start-stop status and continuous non-cooling status. The average cooling time acquisition module is used to acquire the average cooling time, average cooling time threshold range, average operating rate, average operating rate threshold range, temperature of the variable temperature chamber and temperature at the shutdown point within a preset time when the working state of the refrigeration equipment is detected to be normal start-stop state. The first state determination module is used to determine whether the state of the refrigerated air duct is abnormal based on the average cooling time, the average cooling time threshold range, the average operating rate, the average operating rate threshold range, the variable temperature chamber temperature, and the shutdown point temperature. The temperature acquisition module is used to acquire the shutdown point temperature, ambient temperature, and variable temperature compartment temperature when the working state of the refrigeration equipment is detected to be a continuous non-cooling state. The shutdown point temperature is the variable temperature compartment temperature when the refrigeration equipment last stopped working, the ambient temperature is the temperature outside the cold storage compartment collected by the ambient temperature sensor, and the variable temperature compartment temperature is the current temperature of the variable temperature compartment collected by the variable temperature sensor. The second state determination module is used to determine whether the state of the refrigerated air duct is abnormal based on the shutdown point temperature, ambient temperature, and variable temperature chamber temperature.

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