Method and device for judging abnormity of refrigeration air duct

Abstract

The invention provides a judgment method and device for abnormity of a refrigeration air duct. The judgment method for the abnormity of the refrigeration air duct comprises the steps that the working state of refrigeration equipment within a preset duration is detected; when it is detected that the working state of the refrigeration equipment is a normal start-stop state, the average refrigeration duration of the variable-temperature chamber within the preset duration is obtained; according to the average refrigeration duration and the average refrigeration duration threshold range, whether the state of the refrigeration air duct is abnormal or not is determined; when it is detected that the working state of the refrigeration equipment is a continuous non-refrigeration state, the stop point temperature, the environment temperature and the temperature changing chamber temperature are obtained; and determining whether the state of the refrigeration air duct is abnormal or not according to the stop point temperature, the environment temperature and the variable-temperature chamber temperature. By means of the method, whether the state of the refrigeration air duct in the refrigeration equipment is abnormal or not is determined, and then whether the splicing face in the refrigeration equipment is in poor contact or not is determined, so that the refrigeration equipment with the poor contact face can be overhauled in time, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] The present invention relates to the field, and in particular, to a method and device for judging abnormal refrigeration air ducts. Background Art

[0002] In refrigeration equipment, due to structural limitations, there is a splicing surface between the refrigeration air duct and the air supply duct. When the splicing surface is poorly sealed, cold air will enter the bottom of the refrigerating chamber through the splicing gap, resulting in a low temperature or zero-crossing icing in the refrigerating chamber. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method and device for judging abnormal refrigeration air ducts, which jointly determine whether there is an abnormality in the state of the refrigeration air duct in the refrigeration equipment by using the average refrigeration duration, ambient temperature, variable temperature chamber temperature, and stop point temperature of the refrigeration equipment within a preset duration, and then determine whether the splicing surface in the refrigeration equipment is in poor contact, so that the refrigeration equipment with poor contact of the contact surface can be repaired in time, improving the user experience.

[0004] According to a first aspect of the present invention, there is provided a method for judging abnormal refrigeration air ducts, which is applied to a control module in a refrigeration equipment. The refrigeration equipment further includes a refrigerating chamber, an evaporation chamber, and an ambient temperature sensor. A refrigeration air duct for transmitting gas is provided between the refrigerating chamber and the evaporation chamber. The refrigerating chamber includes a variable temperature chamber and a variable temperature sensor arranged in the variable temperature chamber for measuring the temperature of the variable temperature chamber. The ambient temperature sensor is arranged outside the refrigerating chamber. The control module is electrically connected to the ambient temperature sensor and the variable temperature sensor. The method includes: detecting the working state of the refrigeration equipment within a preset duration, where the working state includes a normal start-stop state and a continuous non-refrigeration state; when detecting that the working state of the refrigeration equipment is the normal start-stop state, obtaining the average refrigeration duration of the variable temperature chamber within the preset duration; determining whether the state of the refrigeration air duct is abnormal according to the average refrigeration duration and the average refrigeration duration threshold range; when detecting that the working state of the refrigeration equipment is the continuous non-refrigeration state, obtaining the stop point temperature, ambient temperature, and variable temperature chamber temperature, where the stop point temperature is the temperature when the refrigeration equipment stopped working last time, the ambient temperature is the variable temperature of the outside of 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; determining whether the state of the refrigeration air duct is abnormal according to the stop point temperature, ambient temperature, and variable temperature chamber temperature.

[0005] In a possible implementation manner of the first aspect, the average refrigeration duration threshold range includes a first duration threshold and a second duration threshold. The first duration threshold is the upper threshold of the average refrigeration duration threshold range, and the second duration threshold is the lower threshold of the average refrigeration duration threshold range. The step of determining whether the state of the refrigerating air duct is abnormal according to the average refrigeration duration and the average refrigeration duration threshold range includes: if the average refrigeration duration is greater than the first duration threshold, determining that the state of the refrigerating air duct is normal; if the average refrigeration duration is greater than the second duration threshold and the average refrigeration duration is less than or equal to the first duration threshold, obtaining the average operation rate of the variable temperature chamber within a preset duration; determining whether the state of the refrigerating air duct is abnormal according to the average operation rate and the average operation rate threshold range; if the average refrigeration duration is less than the second duration threshold, obtaining the variable temperature of the variable temperature chamber and the stop point temperature; determining whether the state of the refrigerating air duct is abnormal according to the variable temperature and the stop point temperature of the variable temperature chamber.

[0006] In a possible implementation manner of the first aspect, the average operation rate threshold range includes a lower limit threshold of the average operation rate. The step of determining whether the refrigerating air duct is abnormal according to the average operation rate and the average operation rate threshold range includes: if the average operation rate is less than or equal to the lower limit threshold of the average operation rate, determining that the state of the refrigerating air duct is abnormal; if the operation rate ratio is greater than the lower limit threshold of the average operation rate, sending a start / stop instruction to the refrigeration device, where the start / stop instruction includes a preset number of start / stop times; after the refrigeration device starts and stops for a preset number of start / stop times based on the start / stop instruction, obtaining the low temperature duration and the total start / stop duration, where the low temperature duration is the total duration corresponding to the variable temperature chamber temperature being less than the stop point temperature within the preset number of start / stop times of the refrigeration device, and the total start / stop duration is the total duration corresponding to the refrigeration device completing the preset number of start / stop times; determining whether the state of the refrigerating air duct is abnormal according to the low temperature duration and the total start / stop duration.

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

[0008] In a possible implementation manner of the first aspect, the step of determining whether the state of the refrigerating air duct is abnormal according to the temperature of the variable-temperature chamber and the stop point temperature includes: obtaining the lowest temperature of the variable-temperature chamber corresponding to when the refrigeration device does not refrigerate and the lowest stop point temperature of the variable-temperature chamber after the refrigeration device stops; if the lowest temperature of the variable-temperature chamber is greater than or equal to the lowest stop point temperature, determining that the state of the refrigerating air duct is normal; if the lowest temperature of the variable-temperature chamber is less than the lowest stop point temperature, determining that the state of the refrigerating air duct is abnormal.

[0009] In a possible implementation manner of the first aspect, the step of determining whether the state of the refrigerating air duct is abnormal according to the stop point temperature, the ambient temperature, and the temperature of the variable-temperature chamber includes: if the duration for which the temperature of the variable-temperature chamber is less than the stop 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, determining that the state of the refrigerating air duct is abnormal; if the duration for which the temperature of the variable-temperature chamber is less than the stop point temperature is greater than or equal to the first preset duration and the ambient temperature is less than the preset ambient temperature, continuously detecting the temperature of the variable-temperature chamber for a second preset duration; if within the second preset duration, the temperature of the variable-temperature chamber is less than the stop point temperature, determining that the state of the refrigerating air duct is abnormal; if within the second preset duration, there is a situation where the temperature of the variable-temperature chamber is greater than or equal to the stop point temperature and the temperature of the variable-temperature chamber rises, determining that the state of the refrigerating air duct is normal.

[0010] In a possible implementation manner of the first aspect, before the step of determining whether the state of the refrigerating air duct is abnormal according to the average refrigeration duration and the average refrigeration duration threshold range, the method further includes: obtaining the average refrigeration duration threshold range, which is obtained by testing a plurality of sample refrigeration devices identical to the refrigeration device in the same environment.

[0011] In a possible implementation manner of the first aspect, the refrigeration device further includes an alarm module. After the step of determining whether the state of the refrigerating air duct is abnormal according to the stop point temperature, the ambient temperature, and the temperature of the variable-temperature chamber, the method further includes: when determining that the state of the refrigerating air duct is abnormal, sending an alarm instruction to the alarm module so that the alarm module alarms the refrigerating air duct in an abnormal state.

[0012] In a possible implementation manner 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: obtaining the temperature of the fruit and vegetable box, where the temperature of the fruit and vegetable box 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 refrigerating air duct is abnormal according to the shutdown point temperature, the ambient temperature, and the temperature of the variable temperature chamber further includes: determining whether the state of the refrigerating air duct is abnormal according to the shutdown point temperature, the ambient temperature, the temperature of the variable temperature chamber, and the temperature of the fruit and vegetable box.

[0013] According to a second aspect of the present invention, there is provided a determination device for abnormal refrigerating air duct, which is applied to a control module in a refrigeration device. The refrigeration device further includes a refrigerating chamber, an evaporation chamber, and an ambient temperature sensor. A refrigerating air duct for transmitting gas is provided between the refrigerating chamber and the evaporation chamber. The refrigerating chamber includes a variable temperature chamber and a variable temperature sensor disposed in the variable temperature chamber for measuring the temperature of the variable temperature chamber. The ambient temperature sensor is disposed outside the refrigerating 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 device within a preset duration, where the working state includes a normal start-stop state and a continuous non-refrigerating state; an average refrigerating duration obtaining module for obtaining the average refrigerating duration of the variable temperature chamber within a preset duration when it is detected that the working state of the refrigeration device is the normal start-stop state; a first state determination module for determining whether the state of the refrigerating air duct is abnormal according to the average refrigerating duration and the average refrigerating duration threshold range; a temperature obtaining module for obtaining the shutdown point temperature, the ambient temperature, and the temperature of the variable temperature chamber when it is detected that the working state of the refrigeration device is the continuous non-refrigerating state, where the shutdown point temperature is the temperature when the refrigeration device stopped working last time, the ambient temperature is the temperature outside the refrigeration device collected by the ambient temperature sensor, and the temperature of the variable temperature chamber is the current temperature of the variable temperature chamber collected by the variable temperature sensor; a second state determination module for determining whether the state of the refrigerating air duct is abnormal according to the shutdown point temperature, the ambient temperature, and the temperature of the variable temperature chamber.

[0014] Based on any of the above aspects, an embodiment of the present invention provides a method and device for determining abnormal refrigerating air duct. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be referred to in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a side cross-sectional view of the internal structure of a refrigeration device;

[0017] Figure 2 It is a schematic flowchart of the steps of a fault prompt method provided by an embodiment of the present invention;

[0018] Figure 3 It is a schematic flowchart of the steps of a fault prompt method provided by another embodiment of the present invention;

[0019] Figure 4 It shows a cross-sectional view of a refrigeration device provided with a fruit and vegetable box and a variable temperature compartment;

[0020] Figure 5 It is a schematic diagram of the functional modules of the determination device for abnormal refrigeration air ducts provided in this embodiment.

[0021] Reference numerals in the drawings: refrigeration 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 manners

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

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0026] It should be noted that, without 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 a refrigeration device as an example, the refrigeration device includes a refrigerating chamber and an evaporation chamber 13. There is an air supply channel 12 for transmitting gas between the refrigerating chamber and the evaporation chamber 13. The evaporation chamber 13 is used to evaporate the refrigerant and absorb heat, so as to realize the heat exchange inside the refrigeration device, and then realize the reduction of the internal temperature of the refrigeration device.

[0028] During refrigeration, the freezing fan in the refrigeration device sends the cold air in the evaporation chamber 13 into the refrigerating chamber through the air supply channel 12. The refrigerating chamber exchanges heat with the cold air in the refrigerating air duct 10, so as to achieve the refrigeration effect of the refrigerating chamber. When the cold air completes heat exchange in the refrigerating chamber, it returns to the evaporation chamber 13.

[0029] However, since the evaporation chamber 13 is arranged in the freezer compartment, due to the limitation of the structure of the refrigeration device, there must be a splicing surface 11 assembled between the refrigerating air duct 10 and the air supply channel 12. For details, please refer to Figure 1 , Figure 1 which is a side sectional view of the internal structure of the refrigeration device. When the splicing surface 11 is poorly sealed, the cold air will enter the bottom of the refrigerating chamber through the splicing gap, resulting in too low temperature at the bottom of the refrigerating chamber. It will also cause abnormal cold air content in the refrigerating air duct 10, and then the refrigerating chamber cannot refrigerate normally.

[0030] In order to solve the technical problems mentioned in the foregoing background art and the above problems, the inventor has innovatively designed the following technical solutions. The specific implementation solutions of the present invention will be described in detail below with reference to the drawings.

[0031] Please refer to Figure 2 , Figure 2 which is a schematic flow chart of the steps of a fault prompt method provided by an embodiment of the present invention. This method is applied to Figure 5The judging device 100 for abnormal refrigerating air ducts as shown. The judging device 100 for abnormal refrigerating air ducts is applied to the control module in the refrigeration equipment. The refrigeration equipment further includes a refrigerating chamber, an evaporation chamber, and an ambient temperature sensor. A refrigerating air duct for transmitting gas is provided between the refrigerating chamber and the evaporation chamber. The refrigerating chamber includes a variable temperature chamber and a variable temperature sensor arranged in the variable temperature chamber for measuring the temperature of the variable temperature chamber. The ambient temperature sensor is arranged outside the refrigerating chamber. 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 equipment or a control module in the refrigeration equipment for detecting whether the refrigerating air duct is abnormal. No specific limitation is made on the control module here. The variable temperature chamber refers to an independent compartment in the refrigeration equipment with adjustable temperature. Users can customize the temperature range of the variable temperature chamber according to their needs. The ambient temperature sensor can be arranged in the hinge cover at the top of the refrigerating chamber or in the middle of the refrigerating chamber. No specific limitation is made on the installation position of the ambient temperature sensor here. The model of the ambient temperature sensor can be the same as or different from that of the variable temperature sensor. No specific limitation is made on the models of the ambient temperature sensor and the variable temperature sensor here.

[0032] The following will elaborate in detail on Figure 2 the process as shown. The fault prompt method can specifically include the following steps:

[0033] Step S110: Detect the working state of the refrigeration equipment within a preset duration, where the working state includes a normal start-stop state and a continuous non-cooling state.

[0034] Among them, the refrigeration equipment can be a refrigerator, a freezer, or other refrigerating machines. No specific limitation is made here.

[0035] Furthermore, the normal start-stop state means that during the operation of the refrigeration equipment, it is restricted by the set refrigeration temperature inside the refrigeration equipment. When the refrigeration temperature reaches the set lowest temperature, the refrigeration stops. When the temperature inside the refrigeration equipment stops cooling, it will slowly warm up due to the influence of the external environmental temperature. When the working temperature of the refrigeration equipment is reached, the refrigeration equipment restarts the working system until the refrigeration temperature reaches the set lowest temperature.

[0036] The continuous non-cooling state means that the refrigeration equipment has other cold sources or the external temperature is not high, resulting in a state where the refrigeration equipment does not need to refrigerate, or a state where the refrigeration equipment fails and cannot refrigerate.

[0037] In an embodiment of the present invention, the detection method for detecting the working state of the refrigeration device may be to obtain the start-stop times of the refrigeration device. If the start-stop times of the refrigeration device reach the preset start-stop times within the preset duration, it can be determined that the working state of the refrigeration device is the normal start-stop state. The preset start-stop times may be preset start-stop times or can be set customarily, and no specific limitation is imposed on the preset start-stop times herein. If the refrigeration device maintains a stopped working state within the preset duration, it can be determined that the working state of the refrigeration device is the continuous non-refrigeration state. The detection method may also be to obtain the temperature data of the refrigeration device. If the temperature of the refrigeration device maintains regular refrigeration and regular temperature recovery within the preset duration, it can be determined that the working state of the refrigeration device is the normal start-stop state. If the temperature of the refrigeration device continuously rises within the preset duration, it can be determined that the working state of the refrigeration device is the continuous non-refrigeration state. No specific limitation is imposed on the detection method for detecting the working state of the refrigeration device herein. It should be noted that to ensure the accuracy of the state of the refrigeration device detected by the control module, the information collected by the control module needs to be collected after the refrigeration device is powered on and operates for a period of time.

[0038] Step S120: When it is detected that the working state of the refrigeration device is the normal start-stop state, obtain the average refrigeration duration of the variable temperature chamber within the preset duration.

[0039] In an embodiment of the present invention, the average refrigeration duration may be the entropy value between the total refrigeration duration and the number of refrigerations within the preset duration. The average refrigeration duration may also be obtained by averaging according to the preset proportion data interval with the highest proportion in the normal distribution of the refrigeration duration within the preset duration. The preset proportion may be 80% or 90%. No specific limitation is imposed on the determination method of the average refrigeration duration and the preset proportion herein.

[0040] Step S130: Determine whether the state of the refrigeration air duct is abnormal according to the average refrigeration duration and the average refrigeration duration threshold range.

[0041] Among them, the average refrigeration duration threshold range may be the threshold range set in the refrigeration device, and the average refrigeration duration threshold range may also be obtained from the cloud database. Among them, the threshold range in the cloud database is obtained according to the average refrigeration duration of multiple sample refrigeration devices identical to the refrigeration device in the same environment as the current environment where the refrigeration device is located, and the average refrigeration duration threshold range is determined according to the minimum value and the maximum value corresponding to the average refrigeration duration of the sample refrigeration devices. The average refrigeration duration threshold range may also first determine the average value corresponding to the average refrigeration duration of the sample refrigeration devices, and then determine the average refrigeration duration threshold range according to the preset range and the average value. No specific limitation is imposed on the determination method of the average refrigeration duration threshold range herein.

[0042] Step S140: When it is detected that the working state of the refrigeration device is a continuous non-refrigeration state, obtain the shutdown point temperature, the ambient temperature, and the temperature of the variable temperature chamber.

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

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

[0045] In the embodiment of the present invention, the method for determining whether the state of the refrigerated air duct is abnormal may be to first obtain the temperature difference between the ambient temperature and the shutdown point temperature and the temperature difference between the ambient temperature and the temperature of the variable temperature chamber, and determine whether the state of the refrigerated air duct is abnormal according to the temperature difference. The determination method may also be to first determine whether the ambient temperature is less than the preset ambient temperature. If the ambient temperature is greater than or equal to the preset ambient temperature and the temperature of the variable temperature chamber is less than the shutdown point temperature, it can be determined that there is another cold source in the variable temperature chamber to supply cold to the variable temperature chamber, and then it can be determined that the state of the refrigerated air duct is abnormal. On the contrary, when the temperature of the variable temperature chamber is greater than or equal to the shutdown point temperature, it can be determined that after the refrigeration device stops refrigerating, the temperature of the variable temperature chamber returns to the normal temperature under the influence of the ambient temperature, and at this time, there is no other cold source in the variable temperature chamber to supply cold to it, and then it can be determined that the state of the refrigerated air duct is normal. If the ambient temperature is less than the preset ambient temperature and the temperature of the variable temperature chamber is less than the shutdown point temperature, the temperature of the variable temperature chamber may be affected by the ambient temperature or other cold sources. At this time, the temperature of the variable temperature chamber can be continuously monitored. If during the monitoring process, the temperature of the variable temperature chamber is greater than or equal to the shutdown point temperature, it means that the variable temperature chamber is returning to the normal temperature, and then it can be determined that the state of the refrigerated air duct is normal. If during the monitoring process, the temperature of the variable temperature chamber continues to be lower than the shutdown point temperature, it can be determined that the variable temperature chamber is affected by other cold sources, and then it can be determined that the state of the refrigerated air duct is abnormal. Here, there is no specific limitation on how to determine whether the state of the refrigerated air duct is abnormal according to the shutdown point temperature, the ambient temperature, and the temperature of the variable temperature chamber.

[0046] The solution provided by the present invention uses the average refrigeration duration, the ambient temperature, the temperature of the variable temperature chamber, and the shutdown point temperature of the refrigeration device within a preset duration to jointly determine whether there is an abnormality in the state of the refrigerated air duct in the refrigeration device, and then determine whether the splicing surface in the refrigeration device is in poor contact, so that the refrigeration device with poor contact surface can be repaired in time, improving the user experience.

[0047] Please refer to Figure 3 , Figure 3 which is the schematic flow chart of the steps of the fault prompt method provided by another embodiment of the present invention. Next, it will be directed to Figure 3The following steps will elaborate on the process shown. The fault prompt method may specifically include the following steps:

[0048] Step S201: Detect the working state of the refrigeration equipment within a preset duration. Here, the working state includes the normal start / stop state and the continuous non-cooling state.

[0049] Step S202: When it is detected that the working state of the refrigeration equipment is the normal start / stop state, obtain the average cooling duration of the variable temperature chamber within the preset duration.

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

[0051] Step S203: Obtain the average cooling duration threshold range, which is obtained by testing multiple sample refrigeration equipment identical to the refrigeration equipment in the same environment.

[0052] Among them, the average cooling duration threshold range can be obtained by first testing multiple sample refrigeration equipment identical to the refrigeration equipment in the same environment and recording the corresponding average cooling duration, and then determining the average cooling duration threshold range based on the average cooling duration of the sample refrigeration equipment. The average cooling duration corresponding to the sample refrigeration equipment can be obtained from the cloud database, and then the average cooling duration threshold range is determined based on the obtained average cooling duration of the sample refrigeration equipment.

[0053] The average cooling duration threshold range can be determined by first determining the average cooling duration threshold based on the mean of the cooling durations corresponding to the sample refrigeration equipment, and then determining the average cooling duration threshold range according to a preset floating value. The average cooling duration threshold range can also be directly determined by taking the minimum and maximum values of the average cooling durations of the sample refrigeration equipment in the cloud database as the average cooling duration threshold range. The specific determination method of the average cooling duration threshold range is not specifically limited here.

[0054] Step S204: If the average cooling duration is greater than the first duration threshold, determine that the state of the refrigerated air duct is normal.

[0055] Among them, the first duration threshold is the upper threshold of the average cooling duration threshold range. When the average cooling duration is greater than the first duration threshold, there may be a heat load in the refrigeration equipment, and it can be determined that the refrigeration equipment continues to work. At this time, it can be determined that the refrigerated air duct continues to work, and then the state of the refrigerated air duct is determined to be normal.

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

[0057] Step S206: Determine whether the state of the refrigerating air duct is abnormal according to the average operation rate and the average operation rate threshold range.

[0058] Among them, the second duration threshold is the lower threshold of the average refrigeration duration threshold range. The operation rate refers to the efficiency of a single operation in the refrigeration device. The operation rate is the ratio of the current operation duration to the total start-stop duration of the current time, and the total start-stop duration of the current time is the sum of the current operation duration and the stop duration. The average operation rate is the average value of multiple operation rates in the variable temperature chamber within a preset duration.

[0059] In an embodiment of the present invention, when the average refrigeration duration is greater than the second duration threshold and less than or equal to the first duration threshold, it is determined that the average refrigeration duration is within the normal range. At this time, the average operation rate of the refrigeration device can be used to determine the state of the refrigerating air duct. The determination method can be that if the average operation rate is within the average operation rate threshold range, it can be determined that the state of the refrigerating air duct is normal. If the average operation rate is less than the lower threshold of the average operation rate threshold range or the average operation rate is greater than the average operation rate threshold range, it can be determined that the state of the refrigerating air duct is abnormal. The determination method can also be that if the average operation rate is less than the lower threshold of the average operation rate threshold range, it can be determined that the state of the refrigerating air duct is abnormal. If the average operation rate is greater than the lower threshold of the average operation rate threshold range, further start-stop detection is performed on the refrigeration device to determine whether the state of the refrigerating air duct is abnormal.

[0060] In an embodiment of the present invention, the average operation rate threshold range includes a lower threshold of the average operation rate. The step of determining whether the refrigerating air duct is abnormal according to the average operation rate and the average operation rate threshold range includes: if the average operation rate is less than or equal to the lower threshold of the average operation rate, it is determined that the state of the refrigerating air duct is abnormal. If the operation rate ratio is greater than the lower threshold of the average operation rate, a start-stop instruction is sent to the refrigeration device, where the start-stop instruction includes a preset number of start-stops. After the refrigeration device performs start-stops for the preset number of start-stops based on the start-stop instruction, the low-temperature duration and the total start-stop duration are obtained, where the low-temperature duration is the total duration corresponding to the temperature in the variable temperature chamber being less than the stop point temperature within the preset number of start-stops, and the total start-stop duration is the total duration corresponding to the refrigeration device completing the preset number of start-stops. According to the low-temperature duration and the total start-stop duration, it is determined whether the state of the refrigerating air duct is abnormal.

[0061] In this embodiment, when it is impossible to determine whether the state of the refrigerating air duct is normal based on the average operating rate and the average operating rate threshold range, the start-stop instruction can be continuously sent to the refrigeration device so that the refrigeration device starts and stops according to the preset number of start-stops in the start-stop instruction. After the refrigeration device starts and stops according to the start-stop refrigeration, the temperature of the variable temperature chamber at each start-stop during the start-stop process and the stop point temperature when the refrigeration device stops working are obtained. Furthermore, the low-temperature duration during which the temperature of the variable temperature chamber is lower than the stop point temperature within the preset number of start-stops can be obtained. When the state of the refrigerating air duct is abnormal, the cold air in the refrigerating air duct cannot supply cold to the refrigerating chamber normally. Therefore, at this time, there may be no such low-temperature duration in the refrigerating chamber, or the low-temperature duration is very short. On the contrary, when the low-temperature duration meets the normal standard, it can be determined that the state of the refrigerating air duct is normal. The standard can be that the low-temperature duration and the total start-stop duration meet the preset proportion range, or the standard can be that the difference between the low-temperature duration and the total start-stop duration meets the preset difference range. The normal standard, the preset proportion range, and the preset difference range are not specifically limited herein.

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

[0063] Among them, the low-temperature duration threshold can be determined at a preset proportion of the total start-stop duration, or the low-temperature duration threshold can be set customarily according to the total start-stop duration. The low-temperature duration threshold is not specifically limited herein.

[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 device warms up under the influence of the environment after stopping, and thus it can be determined that there is no other cold source in the refrigeration device to supply cold to the variable temperature chamber. When the low-temperature duration is greater than the low-temperature duration threshold, it indicates that there is other cold source in the refrigeration device to supply cold to the variable temperature chamber, and thus it can be determined that the state of the refrigerating air duct is abnormal.

[0065] Step S207: If the average refrigeration duration is less than the second duration threshold, obtain the temperature of the variable temperature chamber and the stop point temperature.

[0066] Step S208: Determine whether the state of the refrigerating air duct is abnormal according to the temperature of the variable temperature chamber and the stop point temperature.

[0067] In an embodiment of the present invention, the step of determining whether the state of the refrigerated air duct is abnormal according to the temperature of the variable temperature chamber and the stop point temperature includes: obtaining the lowest temperature of the variable temperature chamber corresponding to when the refrigeration equipment does not refrigerate and the lowest stop point temperature of the variable temperature chamber after the refrigeration equipment stops. If the lowest temperature of the variable temperature chamber is greater than or equal to the stop point lowest temperature, it is determined that the state of the refrigerated air duct is normal. If the lowest temperature of the variable temperature chamber is less than the stop point lowest temperature, it is determined that the state of the refrigerated air duct is abnormal.

[0068] Step S209: When it is detected that the working state of the refrigeration equipment is a continuous non-refrigeration state, obtain the stop point temperature, the ambient temperature, and the temperature of the variable temperature chamber.

[0069] Step S210: If the continuous duration during which the temperature of the variable temperature chamber is less than the stop point temperature is greater than or equal to the first preset continuous duration and the ambient temperature is greater than or equal to the preset ambient temperature, it is determined that the state of the refrigerated air duct is abnormal.

[0070] In an embodiment of the present invention, when the state of the refrigerated air duct is normal, when the temperature of the variable temperature chamber is less than the stop point temperature and the ambient temperature is greater than the preset ambient temperature, the variable temperature chamber will heat up according to the ambient temperature. However, when the continuous duration during which the temperature of the variable temperature chamber is less than the stop point temperature is greater than or equal to the first preset continuous duration and the ambient temperature is greater than or equal to the preset ambient temperature, it indicates that there is another cold source in the variable temperature chamber to maintain the low temperature of the variable temperature chamber. At this time, it can be determined that the state of the refrigerated air duct is abnormal.

[0071] Step S211: If the continuous duration during which the temperature of the variable temperature chamber is less than the stop point temperature is greater than or equal to the first preset continuous duration and the ambient temperature is less than the preset ambient temperature, continue to detect the temperature of the variable temperature chamber for the second preset continuous duration.

[0072] Step S212: If the temperature of the variable temperature chamber is less than the stop point temperature within the second preset continuous duration, it is determined that the state of the refrigerated air duct is abnormal.

[0073] Step S213: If there is a situation where the temperature of the variable temperature chamber is greater than or equal to the stop point temperature and the temperature of the variable temperature chamber rises within the second preset continuous duration, it is determined that the state of the refrigerated air duct is normal.

[0074] In an embodiment of the present invention, when the duration for which the temperature of the variable temperature chamber is less than the shutdown point temperature is greater than or equal to the first preset duration and the ambient temperature is less than the preset ambient temperature, it is impossible to determine whether the temperature of the variable temperature chamber remains below the shutdown point temperature due to the influence of the ambient temperature or due to abnormal cold leakage in the refrigerating air duct. Therefore, another cold source is provided for the variable temperature chamber. Accordingly, the relationship between the temperature of the variable temperature chamber and the shutdown point temperature is continuously detected for a second preset duration. When 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 rising, that is, there is no other cold source to maintain the low temperature of the variable temperature chamber, and the state of the refrigerating air duct can be determined to be normal. On the contrary, if the temperature of the variable temperature chamber is continuously less than the shutdown point temperature within the second preset duration, it can be determined that there is another cold source to maintain the low temperature of the variable temperature chamber, and further, the state of the refrigerating air duct can be determined to be abnormal.

[0075] In some embodiments, 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, including: obtaining the temperature of the fruit and vegetable box, where the temperature of the fruit and vegetable box 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 refrigerating air duct is abnormal according to the shutdown point temperature, the ambient temperature, and the temperature of the variable temperature chamber further includes: determining whether the state of the refrigerating air duct is abnormal according to the shutdown point temperature, the ambient temperature, the temperature of the variable temperature chamber, and the temperature of the fruit and vegetable box.

[0076] In an embodiment of the present invention, please refer to Figure 4 , Figure 4 shows a cross-sectional view of a refrigeration device provided with a fruit and vegetable box and a variable temperature chamber. The refrigeration device is further provided with a fruit and vegetable box 16. To improve the detection accuracy of the state of the refrigerating air duct 10, the state of the refrigerating air duct 10 can be determined by comprehensively considering the temperature of the fruit and vegetable box detected by the fruit and vegetable temperature sensor and the temperature of the variable temperature chamber of the variable temperature chamber 14 detected by the variable temperature sensor 15. Among them, the fruit and vegetable temperature sensor can be arranged on the side of the fruit and vegetable box 16 or below the fruit and vegetable box 16, and the installation position of the fruit and vegetable temperature sensor is not limited herein. If the temperature of the fruit and vegetable box and the temperature of the variable temperature chamber are both lower than the shutdown point temperature and the ambient temperature is greater than or equal to the preset ambient temperature, the state of the refrigerating air duct 10 can be determined to be abnormal. If the temperature of the fruit and vegetable box and the temperature of the variable temperature chamber are both lower than the shutdown point temperature and the ambient temperature is less than the preset ambient temperature, then the relationship between the temperature of the variable temperature chamber and the temperature of the fruit and vegetable box and the shutdown point temperature is continuously detected. If the temperature of the fruit and vegetable box and the temperature of the variable temperature chamber are continuously lower than the shutdown point temperature, it is determined that there is another cold source for refrigerating the fruit and vegetable box 16 and the variable temperature chamber 14, and further, the state of the refrigerating air duct 10 can be determined to be abnormal. If there is a temperature of the fruit and vegetable box greater than or equal to the shutdown point temperature, or a temperature of the variable temperature chamber greater than or equal to the shutdown point temperature, or a temperature of the variable temperature chamber and the temperature of the fruit and vegetable box greater than or equal to the shutdown point temperature, the state of the refrigerating air duct 11 is determined to be normal.

[0077] In some other embodiments, when the refrigeration device is only provided with a fruit and vegetable box, it is possible to determine whether the state of the refrigerating air duct in the refrigeration device is abnormal according to the temperature of the fruit and vegetable box, the shutdown point temperature, the ambient temperature, and the average refrigeration duration of the fruit and vegetable box. That is, taking the temperature of the fruit and vegetable box as the temperature of the variable temperature compartment, for the detailed description, reference can be made to the detailed description in the foregoing embodiments, which will not be elaborated herein.

[0078] Step S214: When it is determined that the state of the refrigerating air duct is abnormal, send an alarm instruction to the alarm module so that the alarm module alarms the refrigerating air duct in the abnormal state.

[0079] Among them, the alarm module may include one or more of an indicator light, a display module, and a voice module. The alarm instruction may be a light flashing instruction, a display instruction, and a voice instruction. The alarm instruction corresponds to the alarm module. Here, the alarm module and the alarm instruction are not specifically limited.

[0080] In the embodiment of the present invention, when it is determined that the state of the refrigerating air duct is abnormal, a corresponding alarm instruction is sent to the alarm so that the alarm module alarms the refrigerating air duct in the abnormal state according to the alarm instruction. Exemplarily, taking the alarm module as a voice module as an example, when it is determined that the state of the refrigerating air duct is abnormal, an alarm instruction is sent to the alarm module, and the alarm module, according to the alarm instruction, broadcasts a voice message "There is an abnormality in the refrigerating air duct".

[0081] In the specific implementation process, taking the refrigeration device as a refrigerator as an example. After the refrigerator is powered on and runs, wait until the variable temperature sensor on the variable temperature compartment runs continuously three times within the on-off interval of the set temperature control gear. When the variable temperature compartment starts to refrigerate again, record the refrigeration duration t and the operation rate η of the variable temperature compartment. The operation rate η is the single refrigeration duration / (single refrigeration duration + shutdown waiting time). After continuously recording 3 times, output the average refrigeration duration t1 and the operation rate η1. Retrieve the average refrigeration duration threshold t0 and the average operation rate threshold η0 of the variable temperature compartment of the same model refrigerator with the same set temperature control gear in the cloud server for comparison. t0 is obtained by averaging the data interval of the highest 80% proportion in the normal distribution of the average refrigeration duration of all variable temperature compartments uploaded to the cloud. η0 is the lowest value in the data interval of the highest 80% proportion in the normal distribution of the average refrigeration duration of all variable temperature compartments uploaded to the cloud.

[0082] If the variable temperature compartment continuously does not refrigerate, and the temperature T of the variable temperature sensor B continuously remains lower than the shutdown point temperature T t for more than 3h, and the ambient temperature ≥ 12°C, then it is determined that the temperature change of the variable temperature compartment is not affected by the ambient temperature for temperature recovery, and it can be determined that the state of the refrigerating air duct is abnormal. The control module controls the alarm module to send an alarm to the cloud. When checking, it may be necessary to replace the sealing sponge or the air duct main body. When the ambient temperature < 12°C, continue to monitor for 3h. As long as T appearsB ≥T t and T B continues to rise, it can be determined that the state of the refrigerated air duct is normal. If T B still continues to be lower than T t , then it is determined that the state of the refrigerated air duct is abnormal, and the control module controls the alarm module to send an alarm to the cloud.

[0083] If the variable temperature compartment has normal start and stop, and t1 ≤ 0.8t0, judge the temperature T of the variable temperature sensor B and the stop point T of the variable temperature compartment t . Among them, 0.8t0 is the lower threshold of the average refrigeration duration threshold range determined by the average refrigeration duration threshold t0.

[0084] When the variable temperature compartment does not refrigerate, the lowest temperature T of the variable temperature compartment Bmin ≥ the lowest temperature T of the stop point t -0.5°C, it is determined that the refrigerator is operating normally. Among them, T t -0.5°C is the lowest temperature of the stop point after the refrigeration equipment stops. When the variable temperature compartment does not refrigerate, T Bmin <T t -0.5°C, it can be determined that the state of the refrigerated air duct is abnormal, and the control module controls the alarm module to send an alarm to the cloud.

[0085] If the variable temperature compartment has normal start and stop, and 0.8t0 < t1 ≤ 1.15t0, judge the ratio θ1 = η1 / η0 of the average operation rate η1 and the average operation rate threshold η0. Among them, 1.15t0 is the upper threshold of the average refrigeration duration threshold range determined according to the average refrigeration duration threshold t0. If θ1 ≤ 0.85, that is, when η1 ≤ 0.85η0, it can be determined that the state of the refrigerated air duct is abnormal, and the control module controls the alarm module to send an alarm to the cloud. Among them, 0.85η0 is the lower threshold of the average operation rate threshold determined according to the average operation rate η0. If θ1 > 0.85, continue to monitor the operation of the refrigeration equipment for 3 cycles, and obtain the low temperature duration t2 when the temperature T of the variable temperature sensor B is lower than the stop point T of the variable temperature compartment t and the total start and stop duration t0' of three cycles. If t2 ≤ 0.1t0', it is determined that the refrigerator is operating normally. If t2 > 0.1t0', it can be determined that the state of the refrigerated air duct is abnormal, and the control module controls the alarm module to send an alarm to the cloud. Among them, 0.1t0' is the low temperature duration threshold determined according to the total start and stop duration t0'.

[0086] If the variable temperature compartment has normal start and stop, and t1 > 1.15t0, it can be determined that the variable temperature compartment has a heat load, and then it is determined that the state of the refrigerated air duct is normal.

[0087] The solution provided by the present invention has an average refrigeration duration threshold range determined by multiple sample refrigeration devices identical to the refrigeration device in the same environment. The sample refrigeration devices provide data support for the detection of the refrigeration device, and can more effectively determine whether the state of the refrigeration air duct of the refrigeration device is abnormal based on the average refrigeration duration threshold range, the average refrigeration duration, the ambient temperature, the temperature of the variable temperature chamber, and the shutdown point temperature, thereby improving the user experience.

[0088] Based on the same inventive concept, please refer to Figure 5 , Figure 5 which is a schematic diagram of the functional modules of a determination device 100 for abnormal refrigeration air ducts provided in this embodiment. In this embodiment, the determination device 100 for abnormal refrigeration air ducts can be divided into functional modules according to the above method embodiment. For example, each functional module can be corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present invention is illustrative, only a logical function division, and there may be other division methods in actual implementation. For example, in the case of dividing each functional module corresponding to each function, Figure 5 the shown determination device 100 for abnormal refrigeration air ducts is only a schematic diagram of a device. Among them, for the control module applied to the refrigeration device, the refrigeration device further includes a refrigerating chamber, an evaporation chamber, and an ambient temperature sensor. A refrigeration air duct for transmitting gas is provided between the refrigerating chamber and the evaporation chamber. The refrigerating chamber includes a variable temperature chamber and a variable temperature sensor arranged in the variable temperature chamber for measuring the temperature of the variable temperature chamber. The ambient temperature sensor is arranged outside the refrigerating chamber, and the control module is electrically connected to the ambient temperature sensor and the variable temperature sensor. The functions of each functional module of the determination device for abnormal refrigeration air ducts will be elaborated in detail below.

[0089] The working state detection module 110. In this embodiment, the working state detection module 110 can be used to execute Figure 1 the steps S110 shown. For the specific description of the working state detection module 110, reference can be made to the description of step S110.

[0090] The average refrigeration duration acquisition module 120. In this embodiment, the average refrigeration duration acquisition module 120 can be used to execute Figure 1 the steps S120 shown. For the specific description of the determination module, reference can be made to the description of step S120.

[0091] The first state determination module 130. In this embodiment, the first state determination module 130 can be used to execute Figure 1 the steps S130 shown. For the specific description of the first state determination module 130, reference can be made to the description of step S130.

[0092] The temperature acquisition module 140. In this embodiment, the temperature acquisition module 140 can be used to execute Figure 1 the steps S140 shown. For the specific description of the temperature acquisition module 140, reference can be made to the description of step S140.

[0093] The second state determination module 150. In this embodiment, the second state determination module 150 can be used to execute Figure 1 the steps S150 shown. For the specific description of the second state determination module 150, reference can be made to the description of step S150.

[0094] Furthermore, an embodiment of the present invention also provides a computer storage medium storing an executable program. When the executable program is executed, it can be used to implement the method for judging the abnormality of the refrigeration air duct provided in the above method embodiment.

[0095] Of course, for a computer storage medium containing an executable program provided in an embodiment of the present invention, its executable program is not limited to the above method operations, and can also execute relevant operations in the method for judging the abnormality of the refrigeration air duct provided in any embodiment of the present invention.

[0096] In summary, the present invention provides a method and device for judging the abnormality of a refrigeration air duct. The method for judging the abnormality of the refrigeration air duct is applied to a computer device in a system for judging the abnormality of the refrigeration air duct. First, a motion sensor in the system for judging the abnormality of the refrigeration air duct detects the motion information of the mechanical equipment at a preset time interval, then determines the corresponding motion state according to the motion information, and then compares the motion states of two adjacent times. When the motion states of two adjacent times are inconsistent, the number of over-limit motions is accumulated. When the number of over-limit motions exceeds the preset number of over-limit motions, the motion states of two adjacent times are detected within the next timing duration. If they are inconsistent, the cumulative trigger duration is accumulated. When the cumulative trigger duration is greater than the delay trigger duration, an emergency stop signal is triggered. Through the above method, the over-limit vibration of the mechanical equipment can be captured in time and an emergency stop signal can be issued to prevent the occurrence of vibration instability. At the same time, the setting of trigger delay is provided to avoid false triggering during the normal operation of the equipment.

[0097] Embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, devices, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate for implementing in the process Figure 1One process or multiple processes and / or boxes Figure 1 Apparatus for the functions specified in one box or multiple boxes.

[0098] Although the present invention has been described in connection with the various embodiments, however, in the process of implementing the claimed invention, those skilled in the art can understand and realize other variations of the disclosed embodiments by viewing the accompanying drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0099] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for determining abnormality of a refrigeration air duct, characterized in that: A control module applied to a refrigeration device, the refrigeration device further comprising a refrigeration chamber, an evaporation chamber and an ambient temperature sensor, a refrigeration air duct for transmitting gas is arranged between the refrigeration chamber and the evaporation chamber, the refrigeration chamber comprises a variable temperature chamber and a variable temperature sensor arranged in the variable temperature chamber for measuring the temperature of the variable temperature chamber, the ambient temperature sensor is arranged outside the refrigeration chamber, the control module is electrically connected to the ambient temperature sensor and the variable temperature sensor; the method comprises: 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-refrigeration state; When it is detected that the working state of the refrigeration equipment is a normal start-stop state, obtaining the average refrigeration time of the temperature-changing chamber within a preset time; Determining whether the state of the refrigeration air duct is abnormal according to the average refrigeration time and the average refrigeration time threshold range; When it is detected that the working state of the refrigeration equipment is a continuous non-refrigeration state, the shutdown point temperature, the ambient temperature and the variable temperature chamber temperature are obtained, wherein the shutdown point temperature is the temperature when the refrigeration equipment stopped working most recently, the ambient temperature is the variable temperature chamber temperature 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; Whether the state of the refrigeration air duct is abnormal is determined according to the shutdown point temperature, the ambient temperature and the temperature of the variable temperature chamber.

2. The method for determining abnormality of a refrigeration air duct according to claim 1, characterized in that: The average refrigeration time threshold range includes a first time threshold and a second time threshold, the first time threshold is an upper limit threshold of the average refrigeration time threshold range, and the second time threshold is a lower limit threshold of the average refrigeration time threshold range. The step of determining whether the state of the refrigeration air duct is abnormal according to the average refrigeration time and the average refrigeration time threshold range includes: If the average cooling time is greater than the first time threshold, determining that the state of the refrigeration 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 operation rate of the variable temperature chamber within the preset time; Determining whether the state of the refrigeration air duct is abnormal according to the average operation rate and the average operation 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; Whether the state of the refrigeration air duct is abnormal is determined according to the temperature of the variable temperature chamber and the temperature of the shutdown point.

3. The method for determining abnormality of a refrigeration air duct according to claim 2, characterized in that: The average operation rate threshold range includes an average operation rate lower limit threshold, and the step of determining whether the refrigeration air duct is abnormal according to the average operation rate and the average operation rate threshold range includes: If the average operation rate is less than or equal to the average operation rate lower limit threshold, determining that the state of the refrigeration air duct is abnormal; If the operation rate ratio is greater than the lower limit threshold of the average operation rate, a start / stop instruction is sent to the refrigeration equipment, wherein the start / stop instruction includes a preset start / stop number; After the refrigeration equipment starts and stops for a preset number of times based on the start-stop instruction, the low temperature time and the total start-stop time are obtained, wherein the low temperature time is the total time corresponding to the temperature of the variable temperature chamber of the refrigeration equipment being lower than the temperature of the stop point within the preset number of starts and stops, and the total start-stop time is the total time corresponding to the refrigeration equipment completing the preset number of starts and stops; Whether the state of the refrigeration air duct is abnormal is determined based on the low temperature time and the total start and stop time.

4. The method for determining abnormality of a refrigeration air duct according to claim 3, characterized in that: The step of determining whether the state of the refrigeration air duct is abnormal according to the low temperature duration and the total start-stop duration includes: According to the total start-stop duration, obtaining a 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, it is determined that the state of the refrigeration air duct is normal; If the low temperature duration is greater than the low temperature duration threshold, it is determined that the state of the refrigeration air duct is abnormal.

5. The method for determining abnormality of a refrigeration air duct according to claim 2, characterized in that: The step of determining whether the state of the refrigeration air duct is abnormal according to the temperature of the variable temperature chamber and the temperature of the shutdown point comprises: Obtaining the lowest temperature of the variable temperature chamber corresponding to when the refrigeration device is not refrigerating and the lowest temperature of the stop point of the variable temperature chamber corresponding to when the refrigeration device is stopped; If the lowest temperature of the variable temperature chamber is greater than or equal to the lowest temperature of the shutdown point, it is determined that the state of the refrigeration air duct is normal; If the minimum temperature of the variable temperature chamber is lower than the minimum temperature of the shutdown point, it is determined that the state of the refrigeration air duct is abnormal.

6. The method for determining abnormality of a refrigeration air duct according to claim 1, characterized in that: The step of determining whether the state of the refrigeration air duct is abnormal according to the shutdown point temperature, the ambient temperature and the temperature of the variable temperature chamber comprises: If the duration of the temperature of the variable temperature chamber being lower than the temperature of 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, it is determined that the state of the refrigeration air duct is abnormal; If the duration of the temperature of the changing room being lower than the temperature of the shutdown point is greater than or equal to the first preset duration, and the ambient temperature is lower than the preset ambient temperature, the temperature of the changing room is continuously detected for a second preset duration; If the temperature of the temperature-changing chamber is lower than the temperature of the shutdown point within the second preset duration, it is determined that the state of the refrigeration air duct is abnormal; If the temperature of the variable temperature chamber is greater than or equal to the shutdown point temperature within the second preset duration, and the temperature of the variable temperature chamber rises, it is determined that the state of the refrigeration air duct is normal.

7. The method for determining abnormality of a refrigeration air duct according to any one of claims 1 to 6, characterized in that: Before the step of determining whether the state of the refrigeration air duct is abnormal according to the average refrigeration time and the average refrigeration time threshold range, the method further includes: The average cooling time threshold range is obtained, where the average cooling time threshold range is obtained by testing a plurality of sample refrigeration devices that are the same as the refrigeration device in the same environment.

8. The method for determining abnormality of a refrigeration air duct according to any one of claims 1 to 6, characterized in that: The refrigeration equipment further includes an alarm module. After the step of determining whether the state of the refrigeration air duct is abnormal according to the shutdown point temperature, the ambient temperature and the temperature of the variable temperature chamber, the method further includes: When it is determined that the state of the refrigeration air duct is abnormal, an alarm instruction is sent to the alarm module, so that the alarm module alarms the refrigeration air duct in the abnormal state.

9. The method for determining abnormality of a refrigeration air duct according to any one of claims 1 to 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, wherein the fruit and vegetable temperature sensor is electrically connected to the control module, and includes: Acquire a fruit and vegetable box temperature of the fruit and vegetable box, where 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 according to the shutdown point temperature, the ambient temperature and the temperature of the variable temperature chamber further includes: Whether the state of the refrigeration air duct is abnormal is determined according to the shutdown point temperature, the ambient temperature, the temperature of the variable temperature chamber and the temperature of the fruit and vegetable box.

10. A device for determining abnormality of a refrigeration air duct, characterized in that: A control module applied to a refrigeration device, the refrigeration device further comprising a refrigeration chamber, an evaporation chamber and an ambient temperature sensor, a refrigeration air duct for transmitting gas is arranged between the refrigeration chamber and the evaporation chamber, the refrigeration chamber comprises a variable temperature chamber and a variable temperature sensor arranged in the variable temperature chamber for measuring the temperature of the variable temperature chamber, the ambient temperature sensor is arranged outside the refrigeration chamber, the control module is electrically connected to the ambient temperature sensor and the variable temperature sensor, and the device comprises: A working state detection module, used to detect 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-refrigeration state; An average cooling time acquisition module is used to acquire the average cooling time of the variable temperature room within a preset time when it is detected that the working state of the refrigeration equipment is a normal start-stop state; A first state determination module, configured to determine whether the state of the refrigeration air duct is abnormal according to the average refrigeration time and the average refrigeration time threshold range; A temperature acquisition module, for acquiring the shutdown point temperature, the ambient temperature and the variable temperature chamber temperature when it is detected that the working state of the refrigeration equipment is a continuous non-refrigeration state, wherein the shutdown point temperature is the temperature of the refrigeration equipment when it stops working most recently, the ambient temperature is the variable temperature chamber temperature 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; The second state determination module is used to determine whether the state of the refrigeration air duct is abnormal according to the shutdown point temperature, the ambient temperature and the temperature of the variable temperature room.

Images