Refrigerator door body sealing performance detection method and refrigeration equipment

Abstract

The invention provides a refrigerator door sealing performance detection method and refrigeration equipment, and the method comprises the steps: obtaining the temperature of a refrigeration chamber and the temperature of a freezing chamber in a frosting period, so as to obtain a first judgment result, generating a first detection method or a second detection method based on the first judgment result, the first detection method is a method for comparing the refrigeration time temperature and the evaporation temperature within a first preset time after the defrosting heater stops heating, and the second detection method is a method for comparing the freezing time temperature and the evaporation temperature within a second preset time after the defrosting heater stops heating; and based on the first detection method or the second detection method, generating a door body sealing performance detection result. According to the method, through multiple times of judgment, firstly, a chamber where the sealing performance problem possibly occurs is judged, if the door body has the sealing performance problem, the temperature of the chamber can be decreased and then increased within a certain time after defrosting is finished and heating is stopped, and energy consumption is reduced by detecting the sealing performance of the door body.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigerator door sealing detection method and refrigeration equipment. Background Art

[0002] The refrigerator door is a component of the refrigerator, mainly used to seal the inner cavity of the refrigerator and maintain the internal low temperature environment. The refrigerator door is composed of a door panel, a door seal, and related hinges and lock mechanisms. The refrigerator door switch includes a mechanical switch and an electronic switch. A mechanical switch is a device that realizes the switching function through physical movement, and an electronic switch is a device that uses electrical or electronic components (such as relays, sensors or transistors) to realize the switching function.

[0003] The refrigerator door switch detection mostly adopts magnetic switch or mechanical switch scheme. The magnetic switch uses the magnet installed on the door to interact with the magnetic reed switch on the refrigerator body. When the refrigerator door is closed, the magnet and the magnetic reed switch are connected, indicating that the door is closed; otherwise, it indicates that the door is not closed. The mechanical switch realizes the detection of the door switch status through the physical contact between the door and the switch. These schemes indirectly reflect the sealing of the refrigerator door by detecting the door switch status.

[0004] The above-mentioned magnetic switch or mechanical switch solution can only detect whether the door is closed, but cannot accurately determine whether the door sealing strip is effectively sealed. There is a situation where the door appears to be closed, but in fact it is not tightly sealed due to aging, deformation or obstruction of foreign objects in the door sealing strip. The temperature in the refrigerator compartment is too high, which increases the operating time of the refrigeration system and thus increases energy consumption. Summary of the invention

[0005] The present application provides a refrigerator door sealing detection method and a refrigeration device to solve the problem of increased energy consumption of refrigerators.

[0006] In a first aspect, the present application provides a method for detecting the sealing performance of a refrigerator door, comprising:

[0007] During the frosting period, obtaining the temperature of the refrigerating compartment and the temperature of the freezing compartment to obtain a first judgment result;

[0008] Based on the first judgment result, a first detection method or a second detection method is generated, wherein the first detection method is a refrigeration compartment detection method, which is a detection method for comparing the refrigeration time temperature and the evaporation temperature within a first preset time after the defrost heater stops heating, and the second detection method is a freezing compartment detection rule, which is a detection method for comparing the freezing time temperature and the evaporation temperature within a second preset time after the defrost heater stops heating;

[0009] Based on the first detection method or the second detection method, a detection result is generated, and the detection result is a door body sealing detection result.

[0010] In some feasible embodiments, obtaining the refrigeration compartment temperature and the freezing compartment temperature during the frosting period to obtain the first judgment result includes:

[0011] In a frosting cycle, a first average value and a second average value are calculated, wherein the first average value is the average value of the temperature of the refrigerating compartment, and the second average value is the average value of the temperature of the freezing compartment;

[0012] If the temperature difference between the first average value and the first preset temperature is greater than or equal to the first temperature value, a first judgment result is obtained, and the first judgment result is a refrigerated compartment;

[0013] If the temperature difference between the second average value and the second preset temperature is greater than or equal to the first temperature value, a first judgment result is obtained, and the first judgment result is a freezing compartment.

[0014] In some feasible embodiments, obtaining the refrigeration compartment temperature and the freezing compartment temperature during the frosting period to obtain the first judgment result includes:

[0015] If the temperature difference between the first average value and the first preset temperature is greater than or equal to the first temperature value, and the temperature difference between the second average value and the second preset temperature is greater than or equal to the first temperature value, calculate the first temperature difference and the second temperature difference, the first temperature difference being the temperature difference between the first average value and the first preset temperature, and the second temperature difference being the temperature difference between the second average value and the second preset temperature;

[0016] If the first temperature difference is greater than or equal to the second temperature difference, a first judgment result is obtained, and the first judgment result is a refrigerated compartment;

[0017] If the first temperature difference is smaller than the second temperature difference, a first judgment result is obtained, and the first judgment result is a freezing compartment.

[0018] In some feasible embodiments, generating a first detection method based on the first judgment result includes:

[0019] If the first judgment result is a refrigerated compartment, generating a first detection method;

[0020] The first detection method comprises: if the first temperature difference is greater than or equal to the second temperature value, obtaining a third temperature difference, wherein the third temperature difference is the temperature difference between the highest temperature and the lowest temperature of the refrigerated compartment within a first preset time when the defrost heater stops heating;

[0021] If the third temperature difference is greater than or equal to the third temperature value, a fourth temperature difference is obtained, where the fourth temperature difference is the difference between the evaporation temperature after the defrost heater stops heating for a third preset time and the evaporation temperature when the defrost heater starts heating next time.

[0022] In some feasible embodiments, the detection result includes a first detection result;

[0023] The generating a detection result based on the first detection method or the second detection method includes:

[0024] If the fourth temperature difference is greater than or equal to the fourth temperature value, a first detection result is generated, wherein the first detection result is that the sealing performance of the refrigerating compartment door is poor;

[0025] The first detection result is sent to the cloud to generate an alarm message through the cloud.

[0026] In some feasible embodiments, the second temperature value is the same as the value of the first preset time, which is 3-6; the third temperature value is the same as the value of the third preset time, which is 1-4; and the fourth temperature value is 3-15.

[0027] In some feasible embodiments, generating a second detection method based on the first judgment result includes:

[0028] If the first judgment result is a freezer compartment, generating a second detection method;

[0029] The second detection method includes: if the second temperature difference is greater than or equal to a fifth temperature value, obtaining a fifth temperature difference, wherein the fifth temperature difference is a temperature difference between a maximum temperature and a minimum temperature of the freezing compartment within a second preset time when the defrost heater stops heating;

[0030] If the fifth temperature difference is greater than or equal to the sixth temperature value, the sixth temperature difference is obtained, where the sixth temperature difference is the difference between the evaporation temperature after the defrost heater stops heating for the fifth preset time and the evaporation temperature when the defrost heater starts heating next time.

[0031] In some feasible embodiments, the detection result further includes a second detection result;

[0032] The generating a detection result based on the first detection method or the second detection method includes:

[0033] If the sixth temperature difference is greater than or equal to the seventh temperature value, a second detection result is generated, wherein the second detection result is that the sealing performance of the freezing compartment door is poor;

[0034] The second detection result is sent to the cloud to generate an alarm message through the cloud.

[0035] In some feasible embodiments, the fifth temperature value is the same as the value of the second preset time, which is 5-30; the sixth temperature value is the same as the value of the fifth preset time, which is 2-5; and the seventh temperature value is 3-15.

[0036] In a second aspect, the present application provides a refrigeration device, comprising: a box, a temperature sensor and a controller, wherein the box comprises a refrigeration compartment and a freezing compartment;

[0037] The temperature sensor is used to obtain the temperature of the refrigerating compartment and the temperature of the freezing compartment during the frosting period to obtain a first judgment result;

[0038] The controller is configured to: generate a first detection method or a second detection method based on the first judgment result, the first detection method is a refrigeration compartment detection method, the first detection method is a detection method for comparing the refrigeration time temperature and the evaporation temperature within a first preset time after the defrost heater stops heating, and the second detection method is a freezing compartment detection rule, the second detection method is a detection method for comparing the freezing time temperature and the evaporation temperature within a second preset time after the defrost heater stops heating;

[0039] And based on the first detection method or the second detection method, a detection result is generated, and the detection result is a door body sealing detection result.

[0040] It can be seen from the above technical scheme that the present application provides a refrigerator door sealing detection method and refrigeration equipment, the method comprising: obtaining the refrigeration compartment temperature and the freezing compartment temperature during the frosting cycle to obtain a first judgment result; based on the first judgment result, generating a first detection method or a second detection method, the first detection method is a refrigeration compartment detection method, the first detection method is a detection method for comparing the refrigeration time temperature and the evaporation temperature within the first preset time after the defrost heater stops heating, the second detection method is a freezing compartment detection rule, the second detection method is a detection method for comparing the freezing time temperature and the evaporation temperature within the second preset time after the defrost heater stops heating; based on the first detection method or the second detection method, generating a detection result, the detection result is a door sealing detection result. The method makes multiple judgments, first preliminarily judges the compartments that may have sealing problems, and then further refines the judgment. If the door has a sealing problem, the compartment temperature will drop and then rise within a certain period of time after the defrosting is completed and the heating is stopped, and then the door sealing is detected, and the energy consumption is reduced by detecting the door sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 A schematic diagram of a flow chart of a refrigerator door sealing detection method provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of a process of a refrigerated compartment is provided as a first judgment result provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of a first detection method provided in an embodiment of the present application;

[0045] Figure 4 A schematic flow chart of the second detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0047] The mechanical switch of the refrigerator door is a device that realizes the switching function through physical movement. It consists of an internal metal contact piece, an external operating mechanism, such as a button, a lever or a flap, and a shell. When the operating mechanism is pressed or moved, the metal contact piece closes or opens, thereby forming or cutting off the circuit.

[0048] For example, in a refrigerator door, a mechanical switch may be installed on the edge of the door. When the door is closed, the contact between the door and the switch closes the circuit, indicating that the door is closed. This type of switch is simple and reliable, but has low accuracy when detecting subtle changes and is relatively susceptible to wear and environmental factors.

[0049] An electronic switch is a device that uses electrical or electronic components, such as relays, sensors or transistors, to perform switching functions, opening or closing a circuit through changes in current or the action of an electromagnetic field without the need for physical contact.

[0050] For example, in refrigerators, electronic switches are often used for more complex state detection, such as systems equipped with photoelectric sensors or Hall sensors. When the refrigerator door is closed, the sensor can immediately sense the state of the door through the change of the light beam or magnetic field, obtaining higher accuracy and response speed. Electronic switches have better anti-interference ability and long life, but their design and manufacturing costs are relatively high.

[0051] Mechanical switches are relatively simple and economical, suitable for low-precision occasions, while electronic switches provide higher sensitivity and reliability and adapt to more complex detection needs.

[0052] For refrigerator doors with mechanical switches, the sealing status of the door can be detected by a travel switch or a spring switch. The travel switch can be installed between the refrigerator door and the cabinet. When the door is closed, the switch will be pressed to form a closed state, so that it can be measured whether the door is closed tightly. The output signal of the switch can be directly used to judge the state of the door. If the switch is in the open state, it means that the door is not closed tightly.

[0053] The spring switch can simply monitor the state of the door. When the door is closed, the switch is activated and sends a closed signal. If the door is open, the signal will be disconnected.

[0054] For refrigerator doors with electronic switches, the sealing status of the door can be detected by magnetic switches / Hall sensors, infrared sensors, pressure sensors, and proximity sensors.

[0055] The magnetic switch consists of a pair of magnets and a Hall sensor. When the refrigerator door is closed, the magnet approaches the Hall sensor and the sensor is activated. When the door is opened, the sensor loses the magnetic field and the output signal changes, thereby determining whether the door is closed tightly.

[0056] Infrared sensors can be used to detect the open and close status of doors. When the door is closed and the sensor is blocked, the reflected infrared light will change. If the infrared light is interrupted, it can be determined that the door is not closed tightly.

[0057] A pressure sensor is installed on the door frame to monitor the physical pressure when the door is closed. If the door is not closed tightly, the pressure reading of the sensor will be less than the set value.

[0058] The proximity sensor can also detect the state of the door. The proximity sensor can detect the closed state of the door. If the door is not completely closed, the sensor will not trigger.

[0059] It is also possible to detect the temperature change in the refrigerator compartment. If the door is not closed tightly, the temperature change will exceed the expected range, which can trigger an alarm or prompt. In some embodiments, after the refrigerator compartment door body changes from an open state to a closed state using a refrigerator compartment door switch sensor or other device, the temperature in the refrigerator compartment is detected. If the temperature change value of the refrigerator compartment rises within a preset time period is greater than a preset value, the difference between the current refrigerator compartment temperature and the preset temperature is calculated. If the difference is always greater than the preset value within a target time period after the preset time period, that is, the temperature change value of the refrigerator compartment rises within the preset time period is greater than the preset value, and the room temperature of the refrigerator compartment is higher than the preset temperature by a preset value and the duration is greater than the target time period, it means that the refrigerator compartment door body is not closed tightly.

[0060] The above detection method can be used to detect the sealing of the refrigerator door, but it can only be applied to the case where the door gap is large. When the door gap is large, the air exchange rate is faster, and the warm air from the outside will quickly enter the refrigerator, causing the temperature to rise rapidly. This significant temperature change can be easily captured by the sensor.

[0061] In contrast, a smaller door gap will result in slower heat exchange, with outside air entering the cold room more slowly, and the temperature rising less and changing more slowly, which makes temperature changes difficult to detect, and thus makes it impossible to detect the sealing of the door.

[0062] And the detection method relies on the preset temperature change value and duration to determine whether the door is not closed tightly. For a small gap, the temperature rise may not exceed the set threshold, or even if it exceeds, it may recover in a short time, failing to meet the condition that the duration is greater than the target duration. The refrigerator is also equipped with a cooling system that can compensate for temperature fluctuations caused by slight cold leakage to a certain extent. Therefore, even if there is a small gap, the cooling system may be adjusted in time so that the temperature does not deviate significantly from the set value, thus failing to trigger an alarm.

[0063] In summary, there are many situations where the sealing of the door cannot be detected, the temperature in the refrigerator compartment is too high, and the operating time of the refrigeration system is increased, resulting in increased energy consumption.

[0064] In order to solve the problem of increased energy consumption of refrigerators, some embodiments of the present application provide a method for detecting the sealing of a refrigerator door. The method first preliminarily determines the compartments that may have sealing problems through multiple judgments, and then further refines the judgment. If there is a sealing problem with the door, the temperature of the compartment will drop and then rise again within a certain period of time after defrosting is completed and heating is stopped. The sealing of the door is then detected, and energy consumption is reduced by detecting the sealing of the door.

[0065] like Figure 1 As shown, the method comprises the following steps:

[0066] S100: During the frosting period, the temperature of the refrigerating compartment and the temperature of the freezing compartment are obtained to obtain a first judgment result.

[0067] The frosting cycle is a defrosting process that the refrigerator performs regularly to prevent ice from forming on the evaporator surface. It includes the start-up of the defrost heater, stopping after a period of heating, and then re-entering the cooling stage. The frosting cycle can prevent excessive ice from accumulating on the evaporator surface and maintain efficient refrigeration performance.

[0068] During the operation of the refrigerator, frost accumulates in the freezer due to condensation of water vapor. Under specific temperature and humidity conditions, water vapor driven by the flow of cold air condenses into tiny ice crystals, gradually forming frost. The end of the frosting cycle means the beginning of the defrosting process, which is automatically detected and adjusted by the controller.

[0069] The refrigeration compartment temperature and the freezer compartment temperature are continuously obtained. The refrigeration compartment temperature and the freezer compartment temperature can be sent to the cloud through the refrigerator. It can be understood that during the operation of the refrigerator, the refrigerator will collect operation data. The operation data includes the sensor temperature of the freezer compartment, the sensor temperature of the refrigeration compartment, the evaporator temperature, the heater working status data, etc. After collecting the operation data, the operation data can be further processed through the cloud.

[0070] In some embodiments, the controller in the refrigerator first collects the operating data, the controller can further process the operating data, and then send the processing results directly to the cloud, and the cloud can directly execute the next instruction based on the processing results.

[0071] In this embodiment, the average temperature in the frosting period is first calculated to preliminarily determine the compartments that may have sealing problems, ie, the first determination result.

[0072] First, calculate the average temperature of the refrigerated compartment and the frozen compartment during the frosting cycle. If the average temperature of only one compartment is greater than the set temperature by a certain degree, but the temperature of the other compartment is normal, further determination and detection are performed; if the average temperature of both compartments is greater than the set temperature by a certain degree, then the compartment with the largest difference in set temperature with its corresponding compartment is selected for further determination and detection; by calculating the average value, the temperature difference between the actual temperature and the set temperature is calculated, so as to preliminarily determine which compartment has a sealing problem.

[0073] For details, see Figure 2 In some embodiments, during a frosting period, a first average value and a second average value are calculated;

[0074] If the temperature difference between the first average value and the first preset temperature is greater than or equal to the first temperature value, a first judgment result is obtained, and the first judgment result is a refrigerated compartment;

[0075] If the temperature difference between the second average value and the second preset temperature is greater than or equal to the first temperature value, a first judgment result is obtained, and the first judgment result is a freezing compartment.

[0076] The first average value is the average temperature of the refrigerated compartment, and the second average value is the average temperature of the freezer compartment. During each frosting cycle, the temperature data of the refrigerated compartment and the freezer compartment are continuously monitored and recorded. The average temperature values ​​of the two compartments during this period are calculated respectively, i.e., the first average value and the second average value. By calculating the average value, the influence of short-term temperature fluctuations can be eliminated, and the overall temperature conditions of the two compartments can be more accurately reflected.

[0077] In this embodiment, the first temperature value is 5° C. It is understandable that the first temperature value may also be other temperatures, which can be specifically set according to the actual environment of the refrigerator.

[0078] For the refrigerated compartment, for example, if the first preset temperature is 4° C., the average temperature in the frosting period, i.e., the first average value, is 11° C. Temperature difference = 11° C. - 4° C. = 7° C. Since the temperature difference is greater than the first temperature value, it can be preliminarily determined that the refrigerated compartment may have a sealing problem.

[0079] For the freezing compartment, for example, if the second preset temperature is -18°C, the average temperature in the frosting cycle, i.e., the second average value, is -12°C. Temperature difference = -12°C - (-18°C) = 6°C. Since the temperature difference is greater than the first temperature value, it can be preliminarily determined that there may be a sealing problem in the refrigerating compartment.

[0080] It should be noted that this is a comparison process for determining whether a single compartment has a sealing problem, that is, it is only possible that the temperature difference between the first average value and the first preset temperature is greater than the first temperature value or the temperature difference between the second average value and the second preset temperature is greater than the first temperature value.

[0081] When the temperature difference between the average temperature of the refrigerating compartment and the freezing compartment and the respective preset temperatures exceeds the set threshold, the specific temperature difference between the two compartments is further calculated and compared to determine which compartment is more likely to have a sealing problem. In some embodiments, if the temperature difference between the first average value and the first preset temperature is greater than or equal to the first temperature value, and the temperature difference between the second average value and the second preset temperature is greater than or equal to the first temperature value, the first temperature difference and the second temperature difference are calculated;

[0082] If the first temperature difference is greater than or equal to the second temperature difference, a first judgment result is obtained, and the first judgment result is a refrigerated compartment;

[0083] If the first temperature difference is smaller than the second temperature difference, a first judgment result is obtained, and the first judgment result is a freezing compartment.

[0084] The first temperature difference is the temperature difference between the first average value and the first preset temperature, and the second temperature difference is the temperature difference between the second average value and the second preset temperature.

[0085] For the refrigerated compartment, for example, if the first preset temperature is 4° C., the average temperature in the frosting period, i.e., the first average value, is 10° C. Temperature difference = 10° C. - 4° C. = 6° C. Since the temperature difference is greater than the first temperature value, it can be preliminarily determined that the refrigerated compartment may have a sealing problem.

[0086] For the freezing compartment, for example, if the second preset temperature is -18°C, the average temperature in the frosting cycle, i.e., the second average value, is -12°C. Temperature difference = -12°C - (-18°C) = 6°C. Since the temperature difference is greater than the first temperature value, it can be preliminarily determined that there may be a sealing problem in the refrigerating compartment.

[0087] At this time, the temperature difference between the two compartments exceeds the first temperature value, and the compartment with the larger temperature difference is further judged. If the temperature difference between the refrigerating compartment and the preset temperature is greater than the temperature difference between the freezing compartment and the preset temperature, the first judgment result is the refrigerating compartment; if the temperature difference between the freezing compartment and the preset temperature is greater than the temperature difference between the refrigerating compartment and the preset temperature, the first judgment result is the freezing compartment.

[0088] In order to improve the accuracy of the refrigerator door sealing detection method and reduce misjudgments caused by external environmental changes, such as seasons and ambient temperature fluctuations, dynamic threshold adjustment, seasonal parameter adjustment, environmental compensation mechanism, etc. can be used to dynamically adapt to different external conditions and improve the robustness and reliability of detection.

[0089] Dynamic threshold adjustment is to dynamically adjust the first temperature value used to determine whether the door is not tightly closed according to changes in external environmental conditions. One or more ambient temperature sensors can be set outside the refrigerator to monitor the ambient temperature in real time. Combined with historical data and machine learning algorithms, the change pattern of the temperature inside the refrigerator under different ambient temperatures is analyzed. Based on the current ambient temperature, the first temperature value is automatically adjusted, for example, the threshold is appropriately lowered in cold seasons and appropriately increased in hot seasons.

[0090] Seasonal parameter adjustment is to pre-set appropriate detection parameters according to the characteristics of different seasons. The preset season mode sets different detection parameters for each season, including the first temperature value and other related thresholds. It also allows users to manually select the season mode, or automatically switch to the corresponding mode through the built-in calendar function. Using machine learning technology, the detection parameters of each season can be automatically optimized based on the data of the past few years.

[0091] The environmental compensation mechanism offsets the impact of the external environment on the internal temperature of the refrigerator by introducing additional compensation factors. Consider the impact of air humidity on temperature measurement, especially the problem of condensation water formation in high humidity environments, which can be monitored and adjusted through humidity sensors. Record the user's door opening habits, and appropriately relax the detection threshold for frequent door openings to avoid false alarms. Monitor the operating status of the cooling system, such as the working hours and efficiency of the compressor, and appropriately increase the detection sensitivity when the cooling system is working efficiently.

[0092] Through the above adjustment strategy, the refrigerator door sealing detection method can better adapt to various external environmental changes, reduce false alarms, and improve detection accuracy.

[0093] S200: Generate a first detection method or a second detection method based on the first judgment result.

[0094] Among them, the first detection method is a refrigerated compartment detection method, which is a detection method that compares the refrigeration time temperature and the evaporation temperature within the first preset time after the defrost heater stops heating. Correspondingly, when the first judgment result is a refrigerated compartment, the first detection method is generated. By further testing the first judgment result, it is determined which room has poor door sealing to improve the detection accuracy.

[0095] See also Figure 3 If the preliminary judgment result, that is, the first judgment result, is that the refrigerated compartment may have a sealing problem, a first detection method specifically for the refrigerated compartment will be generated. In some embodiments, if the first judgment result is the refrigerated compartment, the first detection method is generated.

[0096] The first detection method includes: if the first temperature difference is greater than or equal to the second temperature value, obtaining a third temperature difference;

[0097] If the third temperature difference is greater than or equal to the third temperature value, a fourth temperature difference is acquired.

[0098] After the first temperature difference is obtained, it is determined whether the first temperature difference is greater than the second temperature value. If it is greater than the second temperature value, the third temperature difference is obtained. If it is less than or equal to the second temperature value, the detection is stopped, indicating that there is no problem with the sealing of the refrigerated compartment.

[0099] The third temperature difference is the temperature difference between the highest temperature and the lowest temperature of the refrigerated compartment within the first preset time after the defrost heater stops heating. The third temperature difference is obtained by monitoring the temperature change within the first preset time after the defrost heater stops heating, recording the highest temperature and the lowest temperature during this period, and calculating the temperature difference between them. By analyzing the temperature fluctuation in a short period of time, it is further verified whether there is a sealing problem in the refrigerated compartment.

[0100] The defrost heater is a heating device used inside refrigeration equipment to remove frost and ice on the evaporator. When the refrigeration or freezing equipment is running at low temperatures, the moisture in the air will condense into frost on the cooling surface, resulting in reduced refrigeration efficiency and increased energy consumption. The defrost heater heats the evaporator to melt the frost into water and discharge it through the drainage system, thereby maintaining the effective function of the cooling system.

[0101] Before and after the defrost heater works, the internal temperature of the refrigeration equipment will change significantly, especially when the door is not closed tightly. Specifically, if the door of the refrigerator is not closed tightly, warm air from the outside will enter, thus affecting the temperature performance of the evaporator. When the door seals normally, the temperature change of the evaporator is relatively stable. On the contrary, if the door seals poorly, the evaporator temperature will rise quickly after the defrost heater stops heating, affecting the temperature calculation.

[0102] By comparing the evaporation temperature after defrost heating with the temperature cycle after stopping heating, any abnormal temperature changes can be identified, which indicates that there may be problems with the sealing of the door body. By analyzing these changes, the state of the door can be judged more accurately. Using the specific time period after the defrost heater stops heating for detection can reduce false alarms caused by external environment or other factors and improve the reliability of detection.

[0103] First, after the defrost heater stops heating, the temperature inside the refrigerator will experience a short but significant change process, and the evaporator temperature will change due to the external environment and air flow. If the door is not sealed well, that is, the door is not closed tightly, the outside air will enter and cause the temperature fluctuation to be more drastic. By testing during this period of time, other factors can be reduced, such as the impact of users frequently opening the door on temperature changes, to improve the accuracy of the test results.

[0104] Secondly, the temperature change is more sensitive at this time, and it can more accurately capture the abnormal situation caused by the door not being closed tightly. Thirdly, it can ensure that the influence of the defrost heater has subsided, and at the same time reflect the temperature change of the equipment after stopping heating.

[0105] In some embodiments, the second temperature value is 3-6°C, and the first preset time is 3-6 minutes, that is, the second temperature value is the same as the first preset time value, which can simplify the judgment logic. For example, when judging whether the temperature fluctuation of the refrigerated compartment is abnormal, if the temperature difference (i.e., the amplitude of the temperature fluctuation) exceeds a certain threshold (this threshold is also used as the length of the time period), the temperature fluctuation can be considered abnormal. This setting can make these parameters more intuitive to understand and apply. In addition, by setting the temperature difference and the time length to the same numerical range, the measurement standards can be unified to a certain extent, which helps to maintain consistency when performing fault detection and reduce misjudgments or missed judgments caused by different measurement standards.

[0106] After the third temperature difference is obtained, it is determined whether the third temperature difference is greater than or equal to the third temperature value. If it is greater than the third temperature value, the fourth temperature difference is obtained. If it is less than or equal to the third temperature difference, the detection is stopped, indicating that there is no problem with the sealing of the refrigerated compartment.

[0107] Exemplarily, the first temperature difference is 6°C and the second temperature value is 5°C, then the first temperature difference is greater than the second temperature value, and the third temperature difference is further obtained. If the third temperature difference is 2°C and the third temperature value is 3°C, then the third temperature difference is less than the third temperature value, and the detection is stopped, indicating that there is no sealing problem in the refrigerated compartment.

[0108] The fourth temperature difference is the difference between the evaporation temperature after the third preset time when the defrost heater stops heating and the evaporation temperature when the defrost heater starts heating next time. The fourth temperature difference is obtained by recording the evaporation temperature after the third preset time after the defrost heater stops being used, comparing it with the evaporation temperature when the defrost heater starts heating next time, and calculating the temperature difference between the two. By comparing the change in evaporation temperature, it is further confirmed whether the refrigeration efficiency of the refrigerated compartment is affected, thereby indirectly judging whether the door is closed well.

[0109] After the third preset time after the defrost heater stops heating, record the evaporation temperature and compare it with the evaporation temperature when the defrost heater starts heating next time, and calculate the difference between the two. The evaporation temperature directly reflects the working status of the evaporator. If the door is not closed tightly, cold air leakage will cause the evaporator temperature to change. This change is particularly obvious in a period of time after the defrost heater stops heating. By comparing the evaporation temperature after the defrost heater stops heating with the evaporation temperature before the next start, the impact of the door not closing tightly on the long-term performance of the evaporator can be evaluated, and the existence of the problem can be further confirmed. It can also help distinguish between a door not closing tightly and other potential faults, such as cooling system problems, because other faults will not cause the same evaporation temperature change pattern.

[0110] In some embodiments, the third temperature value is 1-4°C, and the first preset time is 1-4 minutes. That is to say, the third temperature value is the same as the third preset time, and its effect is the same as the effect of the second temperature value and the first preset time in the above description, which will not be repeated here.

[0111] Exemplarily, if the third temperature difference is 5° C. and the third temperature value is 3° C., then the third temperature difference is greater than or equal to the third temperature value, and the fourth temperature difference is acquired.

[0112] The test results include a first test result and a second test result, wherein the first test result is that the sealing of the refrigerated compartment is poor, and the second test result is that the sealing of the freezer compartment is poor. It is understandable that for other test results, for example, if the third temperature difference is less than the third temperature value, the test results can also be output while the test is stopped, and at this time, the test results are all test results that there is no problem with the sealing.

[0113] In some embodiments, if the fourth temperature difference is greater than or equal to the fourth temperature value, a first detection result is generated, and the first detection result is that the sealing of the door of the cold storage compartment is poor, and the door may leak, resulting in excessive temperature fluctuations in the cold storage compartment, or excessive heat loss during the defrosting process.

[0114] The first detection result is sent to the cloud to generate an alarm message through the cloud.

[0115] Among them, the fourth temperature value is 3-15. For example, if the fourth temperature difference is 3°C, when the fourth temperature value is 4°C, the detection is stopped, and the detection result indicating that there is no problem with the refrigerated compartment can be output; if the fourth temperature difference is 3°C, when the fourth temperature value is also 3°C, the first detection result is generated.

[0116] When the first test result is generated, the result will be sent to the cloud server. The cloud server receives the test result and generates corresponding alarm information according to the preset alarm logic and rules. The alarm information may include: refrigeration equipment number, fault type (poor door sealing), fault time, recommended maintenance measures, etc. The cloud server can send the alarm information to the equipment maintenance personnel or management personnel through SMS, email, APP push, etc.

[0117] See also Figure 4 For the second detection method, the second detection method is a freezer compartment detection rule. The second detection method is a detection method that compares the freezing time temperature and the evaporation temperature within a second preset time after the defrost heater stops heating. Correspondingly, when the first judgment result is a freezer compartment, the second detection method is generated.

[0118] If the preliminary judgment result, that is, the first judgment result, is that the freezer compartment may have a sealing problem, a second detection method specifically for the freezer compartment will be generated. In some embodiments, if the first judgment result is the freezer compartment, a second detection method is generated.

[0119] The second detection method includes: if the second temperature difference is greater than or equal to a fifth temperature value, obtaining a fifth temperature difference;

[0120] If the fifth temperature difference is greater than or equal to the sixth temperature value, the sixth temperature difference is acquired.

[0121] After the second temperature difference is obtained, it is determined whether the second temperature difference is greater than or equal to the fifth temperature value. If it is greater than the fifth temperature value, the fifth temperature difference is obtained. If it is less than or equal to the fifth temperature value, the detection is stopped, indicating that there is no problem with the sealing of the freezing compartment.

[0122] The fifth temperature difference is the temperature difference between the highest temperature and the lowest temperature of the freezer compartment within the second preset time when the defrost heater stops heating, reflecting the temperature fluctuation of the freezer compartment after the defrost heater stops working. If the temperature fluctuation is too large, it indicates that the thermal insulation performance of the freezer compartment is poor, or there are other factors that cause temperature fluctuations. By monitoring the temperature fluctuations in a short period of time, significant temperature changes caused by the door not being closed tightly can be captured. The low temperature environment of the freezer compartment makes the temperature fluctuation more sensitive, which is helpful for detection.

[0123] Although both the refrigerated compartment and the frozen compartment use defrost heaters to detect temperature changes, there are some differences in the specific implementation process due to their different working environments and characteristics.

[0124] The temperature range of the cold storage room is maintained between 0℃ and 4℃. As the temperature is close to the dew point, condensation water is easily formed. In addition, the frequency of use is high. Users frequently open the door of the cold storage room to take out food, resulting in large temperature fluctuations. The defrost heater is used to prevent ice from forming on the evaporator surface to ensure refrigeration efficiency. The cycle is short. Due to the high temperature and high humidity in the cold storage room, the defrost cycle is relatively short, for example, once every few hours.

[0125] The temperature range of the freezer is maintained below -18℃, and the humidity is low. There is less moisture in the air in a low temperature environment, and condensation is not obvious. In addition, the frequency of use is low, and the frequency of users opening the freezer is relatively low, and the temperature fluctuation is small. The freezer is also used to melt the ice on the surface of the evaporator, but it focuses more on maintaining the performance of the evaporator for a long time, and its cycle is longer. Due to the low temperature and low humidity of the freezer, the defrosting cycle is relatively long, for example, once a day or longer.

[0126] When calculating the third temperature difference, the temperature of the cold storage room is close to the dew point. When the door is opened, the warm air from the outside enters, causing the temperature to rise rapidly. After closing, the temperature will drop rapidly. Therefore, the temperature fluctuation is more significant in a short period of time. Higher humidity makes temperature changes more sensitive, and it can capture the situation where the door is not closed tightly earlier. Monitoring temperature changes in a short period of time can quickly identify abnormal situations and take timely measures.

[0127] When calculating the fifth temperature difference, the temperature in the freezer is low, and even if the door is not closed tightly, the temperature changes relatively slowly, and the fluctuations in the short term are not as significant as those in the refrigerated compartment. Lower humidity and fewer door openings make the temperature changes relatively stable, and it takes longer to observe obvious temperature fluctuations.

[0128] In order to accurately capture tiny temperature changes, in some embodiments, the fifth temperature value is the same as the value of the second preset time, which is 5-30, that is, the fifth temperature value is 5-30°C, and the second preset time is 5-30 minutes. Temperature fluctuations can be detected through longer detection time and a wider temperature range.

[0129] After the fifth temperature difference is obtained, it is determined whether the fifth temperature difference is greater than or equal to the sixth temperature value. If it is greater than the sixth temperature value, the sixth temperature difference is obtained. If it is less than or equal to the sixth temperature difference, the detection is stopped, indicating that there is no problem with the sealing of the freezing compartment.

[0130] Exemplarily, the fifth temperature difference is 23°C and the sixth temperature value is 20°C, then the fifth temperature difference is greater than the sixth temperature value, and the sixth temperature difference is further obtained. If the sixth temperature difference is 2°C and the sixth temperature value is 3°C, then the sixth temperature difference is less than the sixth temperature value, and the detection is stopped, indicating that there is no sealing problem in the freezing compartment.

[0131] The sixth temperature difference is the difference between the evaporation temperature after the defrost heater stops heating for the fifth preset time and the evaporation temperature when the defrost heater starts heating next time.

[0132] Although the temperature of the freezing compartment is low and changes slowly, the change of the evaporation temperature can still provide valuable information in the short time after the defrost heater stops heating, especially when the door is not closed tightly, the cold air leakage will cause the evaporation temperature to rise rapidly. Therefore, in some embodiments, the sixth temperature value is the same as the value of the fifth preset time, which is 2-5, that is, the sixth temperature value is 2-5°C, and the fifth preset time is 2-5 minutes. In addition, a shorter monitoring time helps to improve detection efficiency and reduce unnecessary energy consumption, especially for the freezing compartment, a shorter monitoring time can also reduce additional energy consumption.

[0133] Exemplarily, if the fifth temperature difference is 5° C. and the sixth temperature value is 3° C., then the fifth temperature difference is greater than the sixth temperature value, and the sixth temperature difference is continuously acquired.

[0134] In some embodiments, if the sixth temperature difference is greater than or equal to the seventh temperature value, a second detection result is generated, and the second detection result is that the sealing performance of the freezing compartment door is poor;

[0135] The second detection result is sent to the cloud to generate an alarm message through the cloud.

[0136] Among them, the seventh temperature value is 3-15. When the sixth temperature difference is greater than or equal to the seventh temperature value, it indicates that the door of the freezing compartment is not tightly closed. The cloud server receives the detection result and generates corresponding alarm information according to the preset alarm logic and rules. The alarm information may include: refrigeration equipment number, fault type (poor door sealing), fault time, recommended maintenance measures, etc. The cloud server can send the alarm information to the maintenance personnel or management personnel of the equipment through SMS, email, APP push, etc.

[0137] S300: Generate a detection result based on the first detection method or the second detection method.

[0138] The test result is the door sealing test result. It can be understood that the test result is only one test result. For example, the test result is that the freezer door sealing is poor, or the test result is that the refrigerator door sealing is poor. There will not be two test results.

[0139] The detection method can effectively determine whether the refrigerator door is well sealed, thereby avoiding cold air leakage and extra energy consumption.

[0140] Based on the above-mentioned method for detecting the sealing property of a refrigerator door, some embodiments of the present application further provide a refrigeration device, including: a box, a temperature sensor and a controller, wherein the box includes a refrigerating compartment and a freezing compartment;

[0141] The temperature sensor is used to obtain the temperature of the refrigerating compartment and the temperature of the freezing compartment during the frosting period to obtain a first judgment result;

[0142] The controller is configured to: generate a first detection method or a second detection method based on the first judgment result, the first detection method is a refrigeration compartment detection method, the first detection method is a detection method for comparing the refrigeration time temperature and the evaporation temperature within a first preset time after the defrost heater stops heating, and the second detection method is a freezing compartment detection rule, the second detection method is a detection method for comparing the freezing time temperature and the evaporation temperature within a second preset time after the defrost heater stops heating;

[0143] And based on the first detection method or the second detection method, a detection result is generated, and the detection result is a door body sealing detection result.

[0144] The refrigeration device provided in the embodiment of the present application may be a refrigerator. Taking a refrigerator as an example, in order to realize refrigeration and operation, it at least includes a refrigeration system, a cooling system, a control system and a box. Among them, the refrigeration system is used to produce a refrigeration effect, the cooling system is used to maintain a low temperature environment, the control system is used to control the temperature and humidity in the refrigerator, etc., and the box is used to provide storage space. It can be understood that the refrigeration system, the cooling system, and the control system include specific components that can realize the above functions.

[0145] In some embodiments, the refrigeration system includes a compressor, a condenser, an evaporator, and a throttling device. Among them, the compressor is used to compress the refrigerant gas, increase the pressure and temperature, and thus promote the flow of the refrigerant in the system. During the compression process, the refrigerant changes from a low-pressure and high-temperature gas to a high-pressure and high-temperature gas, thereby producing a refrigeration effect. The condenser is used to cool the high-temperature and high-pressure gas discharged from the compressor into a liquid state. The heat is released through the heat sink, and the refrigerant gas is converted into a liquid state, ready to enter the next step of the refrigeration cycle. The evaporator is used to absorb heat in the refrigeration system. The refrigerant evaporates from a liquid state to a gas state in the evaporator, absorbing heat from the surrounding environment, thereby achieving the purpose of lowering the temperature inside the refrigerator. The throttling device may include an expansion valve and a capillary tube, which are used to adjust the flow rate of the refrigerant, reduce its pressure, and make it become a low-temperature and low-pressure gas-liquid mixed state, ready to enter the evaporator.

[0146] In some embodiments, the cooling system includes a fan connected to the evaporator. The fan circulates air in the compartments, such as the freezer and refrigerator, to transfer heat to the evaporator, helping to maintain a low temperature environment inside the refrigerator.

[0147] It also includes a defrost heater, which is a heating device inside the refrigeration device, for removing frost and ice on the evaporator. It should be noted that the above example is only a simple division of refrigerator functions and does not limit the specific structure of the refrigeration device in the embodiment of the present application.

[0148] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A method for detecting the sealing performance of a refrigerator door, characterized in that: include: During the frosting period, obtaining the temperature of the refrigerating compartment and the temperature of the freezing compartment to obtain a first judgment result; Based on the first judgment result, a first detection method or a second detection method is generated, wherein the first detection method is a refrigeration compartment detection method, which is a detection method for comparing the refrigeration time temperature and the evaporation temperature within a first preset time after the defrost heater stops heating, and the second detection method is a freezing compartment detection rule, which is a detection method for comparing the freezing time temperature and the evaporation temperature within a second preset time after the defrost heater stops heating; Based on the first detection method or the second detection method, a detection result is generated, and the detection result is a door body sealing detection result.

2. The refrigerator door sealing detection method according to claim 1, characterized in that: The step of obtaining the refrigeration compartment temperature and the freezing compartment temperature during the frosting period to obtain a first judgment result includes: In a frosting cycle, a first average value and a second average value are calculated, wherein the first average value is the average value of the temperature of the refrigerating compartment, and the second average value is the average value of the temperature of the freezing compartment; If the temperature difference between the first average value and the first preset temperature is greater than or equal to the first temperature value, a first judgment result is obtained, and the first judgment result is a refrigerated compartment; If the temperature difference between the second average value and the second preset temperature is greater than or equal to the first temperature value, a first judgment result is obtained, and the first judgment result is a freezing compartment.

3. The refrigerator door sealing detection method according to claim 1, characterized in that: The step of obtaining the refrigeration compartment temperature and the freezing compartment temperature during the frosting period to obtain a first judgment result includes: If the temperature difference between the first average value and the first preset temperature is greater than or equal to the first temperature value, and the temperature difference between the second average value and the second preset temperature is greater than or equal to the first temperature value, calculate the first temperature difference and the second temperature difference, the first temperature difference being the temperature difference between the first average value and the first preset temperature, and the second temperature difference being the temperature difference between the second average value and the second preset temperature; If the first temperature difference is greater than or equal to the second temperature difference, a first judgment result is obtained, and the first judgment result is a refrigerated compartment; If the first temperature difference is smaller than the second temperature difference, a first judgment result is obtained, and the first judgment result is a freezing compartment.

4. The refrigerator door sealing detection method according to claim 3, characterized in that: The generating a first detection method based on the first judgment result includes: If the first judgment result is a refrigerated compartment, generating a first detection method; The first detection method comprises: if the first temperature difference is greater than or equal to the second temperature value, obtaining a third temperature difference, wherein the third temperature difference is the temperature difference between the highest temperature and the lowest temperature of the refrigerated compartment within a first preset time when the defrost heater stops heating; If the third temperature difference is greater than or equal to the third temperature value, a fourth temperature difference is obtained, where the fourth temperature difference is the difference between the evaporation temperature after the defrost heater stops heating for a third preset time and the evaporation temperature when the defrost heater starts heating next time.

5. The refrigerator door sealing detection method according to claim 4, characterized in that: The test results include a first test result; The generating a detection result based on the first detection method or the second detection method includes: If the fourth temperature difference is greater than or equal to the fourth temperature value, a first detection result is generated, wherein the first detection result is that the sealing performance of the refrigerating compartment door is poor; The first detection result is sent to the cloud to generate an alarm message through the cloud.

6. The refrigerator door sealing detection method according to claim 5, characterized in that: The second temperature value is the same as the value of the first preset time, which is 3-6; the third temperature value is the same as the value of the third preset time, which is 1-4; and the fourth temperature value is 3-15.

7. The refrigerator door sealing detection method according to claim 3, characterized in that: The generating a second detection method based on the first judgment result includes: If the first judgment result is a freezer compartment, generating a second detection method; The second detection method includes: if the second temperature difference is greater than or equal to a fifth temperature value, obtaining a fifth temperature difference, wherein the fifth temperature difference is a temperature difference between a maximum temperature and a minimum temperature of the freezing compartment within a second preset time when the defrost heater stops heating; If the fifth temperature difference is greater than or equal to the sixth temperature value, the sixth temperature difference is obtained, where the sixth temperature difference is the difference between the evaporation temperature after the defrost heater stops heating for the fifth preset time and the evaporation temperature when the defrost heater starts heating next time.

8. The refrigerator door sealing detection method according to claim 7, characterized in that: The test result also includes a second test result; The generating a detection result based on the first detection method or the second detection method includes: If the sixth temperature difference is greater than or equal to the seventh temperature value, a second detection result is generated, wherein the second detection result is that the sealing performance of the freezing compartment door is poor; The second detection result is sent to the cloud to generate an alarm message through the cloud.

9. The refrigerator door sealing detection method according to claim 8, characterized in that: The fifth temperature value is the same as the value of the second preset time, which is 5-30; the sixth temperature value is the same as the value of the fifth preset time, which is 2-5; and the seventh temperature value is 3-15.

10. A refrigeration device, characterized in that: include: A box, a temperature sensor and a controller, wherein the box includes a refrigerating compartment and a freezing compartment; The temperature sensor is used to obtain the temperature of the refrigerating compartment and the temperature of the freezing compartment during the frosting period to obtain a first judgment result; The controller is configured to: generate a first detection method or a second detection method based on the first judgment result, the first detection method is a refrigeration compartment detection method, the first detection method is a detection method for comparing the refrigeration time temperature and the evaporation temperature within a first preset time after the defrost heater stops heating, and the second detection method is a freezing compartment detection rule, the second detection method is a detection method for comparing the freezing time temperature and the evaporation temperature within a second preset time after the defrost heater stops heating; And based on the first detection method or the second detection method, a detection result is generated, and the detection result is a door body sealing detection result.

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