Refrigerator door sealing test method and refrigeration equipment

Abstract

This invention provides a method and refrigeration equipment for detecting the sealing performance of a refrigerator door. The method includes: acquiring the temperatures of the refrigerator compartment and the freezer compartment during a frosting cycle to obtain a first judgment result; then, based on the first judgment result, generating either a first detection method or a second detection method. The first detection method involves comparing the refrigerator temperature and evaporation temperature within a first preset time after the defrosting heater stops heating; the second detection method involves comparing the freezer temperature and evaporation temperature within a second preset time after the defrosting heater stops heating. Based on the first or second detection method, a door sealing performance test result is generated. This method involves multiple judgments. First, it identifies compartments where sealing problems may occur. If a door sealing problem exists, the compartment temperature will decrease and then rise again within a certain period after defrosting ends and heating stops. By detecting the door sealing performance, energy consumption is reduced.

Description

TECHNICAL FIELD

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

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

[0003] The refrigerator door body switch detection is mostly based on magnetic switches or mechanical switches. The magnetic switch uses a magnet installed on the door body to interact with a magnetic reed switch on the refrigerator body. When the refrigerator door body is closed, the magnet connects with the magnetic reed switch, indicating that the door body has been closed. Conversely, it indicates that the door body has not been closed. The mechanical switch detects the door body switch state by physical contact between the door body and the switch. These schemes indirectly reflect the sealing performance of the refrigerator door body by detecting the door body switch state.

[0004] The above-mentioned magnetic switch or mechanical switch scheme can only detect whether the door body is closed, and cannot accurately determine whether the door seal is effectively sealed. There is a situation where the door body appears to be closed, but in fact, due to the aging, deformation, or foreign matter blocking of the door seal, the sealing is not tight, resulting in a high temperature in the inner compartment of the refrigerator, increasing the running time of the refrigeration system, and thus increasing the energy consumption. SUMMARY

[0005] The present application provides a refrigerator door body sealing detection method and refrigeration equipment to solve the problem of high energy consumption of the refrigerator.

[0006] In a first aspect, the present application provides a refrigerator door body sealing detection method, comprising:

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

[0008] Based on the first judgment result, a first detection method or a second detection method is generated. The first detection method is a refrigeration compartment detection method, and the first detection method is a detection method by comparing the refrigeration temperature and the evaporation temperature within a first predetermined time after the defrosting heater stops heating. The second detection method is a freezing compartment detection rule, and the second detection method is a detection method by comparing the freezing temperature and the evaporation temperature within a second predetermined time after the defrosting heater stops heating;

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

[0010] In some possible embodiments, the first determination result is obtained by acquiring the temperature of the refrigeration compartment and the temperature of the freezer compartment during a frosting period.

[0011] During the frosting period, a first average value and a second average value are calculated, the first average value being a temperature average value of the refrigeration compartment, and the second average value being a temperature average value of the freezer compartment.

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

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

[0014] In some possible embodiments, the first determination result is obtained by acquiring the temperature of the refrigeration compartment and the temperature of the freezer compartment during a frosting period.

[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, a first temperature difference and a second temperature difference are calculated, 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 determination result is obtained, and the first determination result is the refrigeration compartment.

[0017] If the first temperature difference is less than the second temperature difference, a first determination result is obtained, and the first determination result is the freezer compartment.

[0018] In some possible embodiments, the first detection method is generated based on the first determination result.

[0019] If the first determination result is the refrigeration compartment, a first detection method is generated.

[0020] The first detection method includes: if the first temperature difference is greater than or equal to a second temperature value, a third temperature difference is acquired, the third temperature difference being a temperature difference between a maximum temperature and a minimum temperature of the refrigeration compartment within a first preset time when the defrosting heater stops heating.

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

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

[0023] The detection result is generated based on the first detection method or the second detection method, including:

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

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

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

[0027] In some possible embodiments, the second detection method is generated based on the first judgment result, including:

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

[0029] The second detection method includes: if the second temperature difference is greater than or equal to a fifth temperature value, a fifth temperature difference is obtained, the fifth temperature difference being a temperature difference between the highest temperature and the lowest temperature of the refrigeration compartment within a second preset time when the defrosting heater stops heating.

[0030] If the fifth temperature difference is greater than or equal to a sixth temperature value, a sixth temperature difference is obtained, the sixth temperature difference being a difference between the evaporating temperature after a fifth preset time when the defrosting heater stops heating and the evaporating temperature when the defrosting heater next starts heating.

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

[0032] The detection result is generated based on the first detection method or the second detection method, including:

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

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

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

[0036] In a second aspect, the present application provides a refrigeration equipment, comprising: a cabinet, a temperature sensor and a controller, the cabinet comprising a refrigeration compartment and a freezing compartment;

[0037] The temperature sensor is configured to obtain the refrigeration compartment temperature and the freezing compartment temperature in a 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 being a refrigeration compartment detection method, the first detection method being a detection method of comparing the refrigeration time temperature and the evaporation temperature in a first preset time after the defrosting heater stops heating, and the second detection method being a freezing compartment detection rule, the second detection method being a detection method of comparing the freezing time temperature and the evaporation temperature in a second preset time after the defrosting heater stops heating.

[0039] And generate a detection result based on the first detection method or the second detection method, the detection result being a door body sealing property detection result.

[0040] It can be known from the above technical solution that the present application provides a refrigerator door body sealing property detection method and a refrigeration equipment, the method comprising: obtaining the refrigeration compartment temperature and the freezing compartment temperature in a frosting period 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 being a refrigeration compartment detection method, the first detection method being a detection method of comparing the refrigeration time temperature and the evaporation temperature in a first preset time after the defrosting heater stops heating, and the second detection method being a freezing compartment detection rule, the second detection method being a detection method of comparing the freezing time temperature and the evaporation temperature in a second preset time after the defrosting heater stops heating; and generating a detection result based on the first detection method or the second detection method, the detection result being a door body sealing property detection result. The method detects the door body sealing property by multiple judgments, first preliminarily judges the compartment that is likely to have a sealing property problem, and further refines the judgment. If the door body has a sealing property problem, the compartment temperature will drop and then rise in a certain time after the defrosting ends and the heating stops, and the door body sealing property is detected, thereby reducing energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0042] Figure 1 A flowchart of a refrigerator door body sealing detection method provided by the embodiment of the present application is shown in the figure.

[0043] Figure 2 A flowchart of the first judgment result being a refrigeration compartment provided by the embodiment of the present application is shown in the figure.

[0044] Figure 3 A flowchart of the first detection method provided by the embodiment of the present application is shown in the figure.

[0045] Figure 4 A flowchart of the second detection method provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

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

[0047] The mechanical switch of the refrigerator door body is a device that realizes the switching function through physical movement, which is composed of internal metal contact pieces, external operating mechanisms, such as buttons, levers or flip covers, and a shell. When the operating mechanism is pressed or moved, the metal contact pieces are closed or disconnected, thereby forming or cutting off the circuit.

[0048] For example, in the refrigerator door body, the mechanical switch can be installed at the edge of the door. When the door is closed, the contact between the door and the switch makes the circuit closed, indicating that the door has been closed. This kind of switch is simple and reliable, but has low precision in detecting subtle changes and is relatively easy to be affected by wear and environmental factors.

[0049] The electronic switch is a device that realizes the switching function by using electrical or electronic components, such as relays, sensors or transistors, which opens or closes the circuit through the change of electric current or the action of electromagnetic field without physical contact.

[0050] For example, in a refrigerator, 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 changes in the light beam or magnetic field, achieving higher accuracy and response speed, and the electronic switch has better anti-interference ability and long service life, but its design and manufacturing cost is relatively high.

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

[0052] For a refrigerator door body with a mechanical switch, the sealing state of the door body can be detected by a travel switch or a spring switch. Among them, the travel switch can be installed between the refrigerator door and the cabinet, when the door is closed, the switch will be pressed, forming a closed state, so that it can measure whether the door is closed tightly, and 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 indicates that the door is not closed tightly.

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

[0054] For a refrigerator door body with an electronic switch, the sealing state of the door body can be detected by a magnetic switch / Hall sensor, an infrared sensor, a pressure sensor, and a proximity sensor.

[0055] The magnetic switch is composed of a pair of magnets and a Hall sensor, when the refrigerator door is closed, the magnet is close to the Hall sensor, the sensor will be activated, when the door is opened, the sensor loses the magnetic field, the output signal changes, so as to judge whether the door is closed tightly.

[0056] The infrared sensor can be used to detect the opening and closing state of the door, when the door is closed, the sensor is blocked, and the reflected infrared light changes, if the infrared light is interrupted, it can be judged that the door is not closed tightly.

[0057] A pressure sensor is installed on the door body 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 be triggered.

[0059] The temperature change of the refrigeration chamber can also be detected. 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 refrigeration chamber door is switched from an open state to a closed state by means of a refrigeration chamber door switch sensor or the like, the temperature in the refrigeration chamber is detected. If the temperature change value of the refrigeration chamber within a preset time period is greater than a preset value, the difference between the current refrigeration chamber 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 refrigeration chamber within the preset time period is greater than the preset value, the refrigeration chamber temperature is higher than the preset temperature by the preset value and the duration is greater than the target time period, it means that the refrigeration chamber door is not closed tightly.

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

[0061] In contrast, a small door gap will slow down the heat exchange speed, and the outside air will enter the refrigeration chamber slowly, with a small temperature rise and a slow change, which makes it difficult to detect temperature changes and thus detect the sealing performance of the door.

[0062] Moreover, the detection method relies on the preset temperature change value and duration to determine whether the door is not closed tightly. For small gaps, the temperature rise may not exceed the set threshold, or even if it does, it may recover in a short time, failing to meet the condition of a duration greater than a target time period. The refrigerator is also equipped with a cooling system that can compensate for temperature fluctuations caused by slight cold leakage to some extent. Therefore, even if there is a small gap, the cooling system may adjust 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 cases where the sealing performance of the door cannot be detected, and the temperature in the refrigerator compartment is too high, increasing the running time of the refrigeration system and thus increasing energy consumption.

[0064] To solve the problem of rising energy consumption of the refrigerator, some embodiments of the present application provide a refrigerator door sealing performance detection method. The method first preliminarily judges the compartment that may have a sealing problem, and then further refines the judgment. If the door has a sealing problem, the temperature in the compartment will drop and then rise within a certain time after the defrosting is completed and the heating is stopped, and then the sealing performance of the door is detected. By detecting the sealing performance of the door, energy consumption is reduced.

[0065] As shown in Figure 1 The method comprises the following steps:

[0066] S100: obtaining the temperature of the refrigeration compartment and the temperature of the freezer compartment in the frosting period to obtain a first determination result.

[0067] The frosting period is a defrosting process periodically performed by the refrigerator to prevent ice from accumulating on the surface of the evaporator, including starting the defrosting heater, stopping after heating for a period of time, and then re-entering the refrigeration stage. The frosting period can prevent the evaporator surface from accumulating too much ice layer and maintain high-efficiency refrigeration performance.

[0068] During the operation of the refrigerator, the accumulation of frost formed by the condensation of water vapor in the freezer compartment, under certain temperature and humidity conditions, water vapor carried by cold air flow condenses into tiny ice crystals, and gradually forms frost. The end of the frosting period means the start of the defrosting process, which is automatically detected and adjusted by the controller.

[0069] The temperature of the refrigeration compartment and the temperature of the freezer compartment are continuously obtained, and the temperature of the refrigeration compartment and the temperature of the freezer compartment can be sent to the cloud by the refrigerator. It can be understood that during the operation of the refrigerator, the refrigerator will collect operation data, including the sensor temperature of the freezer compartment, the sensor temperature of the refrigeration compartment, the evaporator temperature, the heater working state 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 operation data, the controller can further process the operation data, and then sends the processing result directly to the cloud. The cloud can directly issue the next instruction according to the processing result.

[0071] In this embodiment, first, the average temperature in the frosting period is calculated to preliminarily determine the compartment that may have a sealing problem, i.e. the first determination result.

[0072] First, the average temperature of the refrigeration compartment and the freezer compartment in the frosting period is calculated. If only the average temperature of a single compartment is greater than the set temperature by a certain degree, but the temperature of the other compartment is normal, further determination is made; if the average temperatures of both compartments are greater than the set temperature by a certain degree, the compartment with the largest set temperature difference is selected for further determination; the average temperature is calculated to calculate the temperature difference between the actual temperature and the set temperature, so as to preliminarily determine which compartment has a sealing problem.

[0073] Specifically, referring to Figure 2 In some embodiments, the first average value and the second average value are calculated in the frosting period.

[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 determination result is obtained, and the first determination result is the refrigeration 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 determination result is obtained, and the first determination result is that the freezing compartment is faulty.

[0076] The first average value is the average temperature of the refrigerating compartment, and the second average value is the average temperature of the freezing compartment. During each frosting period, the temperature data of the refrigerating compartment and the freezing compartment are continuously monitored and recorded. The average temperatures of the two compartments in this period, i.e., the first average value and the second average value, are calculated respectively. 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 can be understood that the first temperature value can also be other temperatures, which can be set according to the actual environment of the refrigerator.

[0078] For the refrigerating 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. The temperature difference is 11°C-4°C=7°C. Since the temperature difference is greater than the first temperature value, it can be preliminarily determined that the refrigerating 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 period, i.e., the second average value, is -12°C. The temperature difference is -12°C-(-18°C)=6°C. Since the temperature difference is greater than the first temperature value, it can be preliminarily determined that the refrigerating compartment may have a sealing problem.

[0080] It should be noted that this is a comparison process for determining whether a single compartment has a sealing problem, that is, only 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 average temperatures of the refrigerating compartment and the freezing compartment and the respective preset temperatures exceed the set threshold, the specific temperature differences of the two compartments are 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 determination result is obtained, and the first determination result is that the refrigerating compartment is faulty.

[0083] If the first temperature difference is less than the second temperature difference, a first determination result is obtained, and the first determination result is that the freezing compartment is faulty.

[0084] wherein 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 refrigeration compartment, for example, if the first preset temperature is 4°C, the average temperature during the frosting period, i.e. the first average value, is 10°C. Temperature difference = 10°C - 4°C = 6°C, because the temperature difference is greater than the first temperature value, it can be preliminarily judged that the refrigeration compartment may have a sealing problem.

[0086] For the freezer compartment, for example, if the second preset temperature is -18°C, the average temperature during the frosting period, i.e. the second average value, is -12°C. Temperature difference = -12°C - (-18°C) = 6°C, because the temperature difference is greater than the first temperature value, it can be preliminarily judged that the refrigeration compartment may have a sealing problem.

[0087] At this time, the temperature difference of the two compartments exceeds the first temperature value, and further judgment is made through the compartment with the larger temperature difference. If the temperature difference between the refrigeration compartment and the preset temperature is greater than the temperature difference between the freezer compartment and the preset temperature, the first judgment result is the refrigeration compartment, and if the temperature difference between the freezer compartment and the preset temperature is greater than the temperature difference between the refrigeration compartment and the preset temperature, the first judgment result is the freezer compartment.

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

[0089] Dynamic threshold adjustment is to dynamically adjust the first temperature value used to judge whether the door is closed tightly according to the change of external environmental conditions. One or more environmental temperature sensors can be set outside the refrigerator to monitor the environmental temperature in real time. Combined with historical data and machine learning algorithms, the change pattern of the internal temperature of the refrigerator under different environmental temperatures is analyzed. Based on the current environmental temperature, the first temperature value is automatically adjusted, for example, the threshold value is appropriately lowered in cold seasons and appropriately raised in hot seasons.

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

[0091] The environmental compensation mechanism offsets the influence of the external environment on the internal temperature of the refrigerator by introducing an additional compensation factor. Considering the influence of air humidity on temperature measurement, especially the problem of condensate formation that may be caused in a high-humidity environment, the detection standard can be monitored and adjusted by a humidity sensor. The user's door opening habits are recorded, and for the case of frequent door opening, the detection threshold is appropriately relaxed to avoid false positives. The running state of the cooling system, such as the working time and efficiency of the compressor, is monitored, and when the cooling system is in high-efficiency operation, the detection sensitivity is appropriately increased.

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

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

[0094] The first detection method is a refrigeration compartment detection method, and the first detection method is a detection method based on the comparison of the refrigeration temperature and the evaporation temperature within the first preset time after the defrosting heater stops heating. Correspondingly, when the first judgment result is the refrigeration compartment, the first detection method is generated. By further detecting the first judgment result, it is determined which compartment has poor door body sealing to improve the detection accuracy.

[0095] Referring to Figure 3 If the preliminary judgment result, i.e., the first judgment result, is that the refrigeration compartment may have a sealing problem, a first detection method specifically for the refrigeration compartment is generated. In some embodiments, if the first judgment result is the refrigeration compartment, the first detection method is generated.

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

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

[0098] After obtaining the first temperature difference, 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 the sealing of the refrigeration compartment has no problem.

[0099] The third temperature difference is the temperature difference between the maximum temperature and the minimum temperature of the refrigeration compartment within the first preset time after the defrosting heater stops heating. By monitoring the temperature change within the first preset time after the defrosting heater stops heating and recording the maximum temperature and the minimum temperature within this period of time, the temperature difference between them is calculated to obtain the third temperature difference. By analyzing the temperature fluctuation in a short period of time, it is further verified whether the refrigeration compartment has a sealing problem.

[0100] Defrosting heaters are heating devices used inside refrigeration equipment to remove frost and ice from evaporators, which can form when moisture in the air condenses on cooling surfaces when the equipment is operating at low temperatures, causing reduced refrigeration efficiency and increased energy consumption. Defrosting heaters work by heating the evaporator to melt the frost into water and drain it through a drainage system, thus maintaining the effective function of the cooling system.

[0101] The temperature inside the refrigeration equipment will change significantly before and after the defrosting heater works, especially when the door is not closed tightly. Specifically, if the door of the refrigeration chamber is not closed tightly, it will cause warm air from the outside to enter, thereby affecting the temperature performance of the evaporator. When the door is properly sealed, the temperature change of the evaporator is relatively stable. Conversely, if the door is poorly sealed, it will cause the evaporator temperature to rise quickly after the defrosting heater stops heating, affecting the calculation of the temperature.

[0102] By comparing the evaporator temperature after defrosting heating with the temperature period after stopping heating, any abnormal temperature change can be identified, which indicates that there may be a problem with the door sealing. By analyzing these changes, the state of the door can be more accurately determined. Detecting at a specific time period after the defrosting heater stops heating can reduce false positives caused by external environmental or other factors, improving the reliability of the detection.

[0103] First, after the defrosting heater stops heating, the temperature inside the refrigerator will undergo a short but significant change process, and the evaporator temperature will change due to the external environment and air flow. If the door is poorly sealed, i.e., the door is not closed tightly, the entry of external air will cause the temperature fluctuation to be more severe. By detecting during this period, the influence of other factors, such as frequent door opening by the user, on temperature changes can be reduced to improve the accuracy of the detection results.

[0104] Second, the temperature change is more sensitive at this time, which can more accurately capture abnormal situations caused by the door not being closed tightly. Third, it can ensure that the influence of the defrosting heater has subsided, while reflecting 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 and the first preset time have the same numerical value, which can simplify the judgment logic. For example, when judging whether the temperature fluctuation of the refrigeration compartment is abnormal, if the temperature difference (i.e., the amplitude of the temperature fluctuation) exceeds a certain threshold (which is also used as the length of the time period), it can be considered that the temperature fluctuation is abnormal. This setting can be more intuitive to understand and apply these parameters. Moreover, by setting the temperature difference and the time length to the same numerical range, the measurement standard can be standardized to some extent, which helps to maintain consistency when detecting faults and reduces misjudgment or omission caused by different measurement standards.

[0106] After obtaining the third temperature difference, it is determined whether the third temperature difference is greater than or equal to a third temperature value. If it is greater than the third temperature value, a fourth temperature difference is obtained. If it is less than or equal to the third temperature difference, the detection is stopped, indicating that the sealing performance of the refrigeration compartment is not problematic.

[0107] For example, 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 the sealing performance of the refrigeration compartment is not problematic.

[0108] The fourth temperature difference is the difference between the evaporating temperature after the third preset time when the defrosting heater stops heating and the evaporating temperature when the defrosting heater starts heating next time. By recording the evaporating temperature after the third preset time when the defrosting heater stops heating, and comparing it with the evaporating temperature when the defrosting heater starts heating next time, the temperature difference between the two is calculated to obtain the fourth temperature difference. By comparing the change of the evaporating temperature, it is further confirmed whether the refrigeration efficiency of the refrigeration compartment is affected, thereby indirectly judging whether the door is closed well.

[0109] After the third preset time when the defrosting heater stops heating, the evaporating temperature is recorded, and compared with the evaporating temperature when the defrosting heater starts heating next time, the difference between the two is calculated. The evaporating temperature directly reflects the working state of the evaporator. If the door is not closed tightly, the cold air leakage will cause the temperature of the evaporator to change, and this change is particularly obvious within a certain period of time after the defrosting heater stops heating. By comparing the evaporating temperature after the defrosting heater stops heating with the evaporating temperature before the defrosting heater starts heating next time, the influence of the door not being closed tightly on the long-term performance of the evaporator can be evaluated, and the existence of the problem is further confirmed. It can also help to distinguish between the door not being closed tightly and other potential faults, such as cooling system problems, because other faults will not cause the same pattern of evaporating temperature change.

[0110] In some embodiments, the third temperature value is 1-4℃, and the first preset time is 1-4 minutes, that is, the third temperature value is the same as the value of the third preset time, and the effect is the same as that of the second temperature value and the first preset time described above, which will not be repeated here.

[0111] For example, if the third temperature difference is 5℃, and the third temperature value is 3℃, then the third temperature difference is greater than or equal to the third temperature value, and the fourth temperature difference is continued to be obtained.

[0112] For the detection results, including the first detection result and the second detection result, the first detection result is that the sealing of the refrigeration compartment is poor, and the second detection result is that the sealing of the freezing compartment is poor. It can be understood that for other detection results, for example, if the third temperature difference is less than the third temperature value, the detection result can also be output while stopping the detection, at this time the detection result is the detection result that the sealing has no problem.

[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 refrigeration compartment door body is poor, and the door body may have a leakage, which causes the temperature in the refrigeration compartment to fluctuate too much or too much heat to be lost during the defrosting process.

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

[0115] The fourth temperature value is 3-15, for example, if the fourth temperature difference is 3℃, when the fourth temperature value is 4℃, the detection is stopped, and the detection result that the refrigeration compartment has no problem can be output; if the fourth temperature difference is 3℃, when the fourth temperature value is also 3℃, the first detection result is generated.

[0116] When the first detection result is generated, the result will be sent to the cloud server. The cloud server receives the detection result, generates corresponding alarm information according to the preset alarm logic and rules, wherein the alarm information may include: refrigeration equipment number, fault type (poor sealing of door body), 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 and the like.

[0117] Referring to Figure 4 For the second detection method, the second detection method is the freezing compartment detection rule, and the second detection method is a detection method of comparing the freezing time temperature and the evaporation temperature within the second preset time after the heating of the defrosting heater is stopped. Correspondingly, when the first judgment result is the freezing compartment, the second detection method is generated.

[0118] If the preliminary judgment result, i.e., the first judgment result, is that the freezing compartment possibly has a sealing problem, a second detection method specifically for the freezing compartment is generated. In some embodiments, if the first judgment result is the freezing compartment, the 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 a sixth temperature value, a sixth temperature difference is obtained.

[0121] When 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 the sealing of the freezing compartment has not appeared a problem.

[0122] The fifth temperature difference is the temperature difference between the maximum temperature and the minimum temperature of the freezing compartment within a second preset time when the defrosting heater stops heating, reflecting the temperature fluctuation of the freezing compartment after the defrosting heater stops working. If the temperature fluctuation is too large, it indicates that the heat preservation performance of the freezing compartment is poor or there are other factors causing temperature fluctuation. By monitoring the temperature fluctuation in a short time, significant temperature changes caused by the door body not being closed tightly can be captured. The low-temperature environment of the freezing compartment makes the temperature fluctuation more sensitive, which is helpful for detection.

[0123] Although both the refrigeration compartment and the freezing compartment utilize the defrosting heater for temperature change detection, there are some differences in the specific implementation process due to the different working environments and characteristics of the two.

[0124] The temperature range of the refrigeration compartment is maintained at 0℃ to 4℃. Since the temperature is close to the dew point, condensation water is easily formed. Moreover, the frequency of use is high, and the user frequently opens the refrigeration compartment door to take and place food, resulting in a large temperature fluctuation. The defrosting heater is used to prevent the surface of the evaporator from icing and to ensure the refrigeration efficiency, and the period is relatively short. Since the temperature of the refrigeration compartment is relatively high and the humidity is large, the defrosting period is relatively short, for example, once every few hours.

[0125] The temperature range of the freezing compartment is maintained at -18℃ or below, and the humidity is low. In a low-temperature environment, there is less moisture in the air, and condensation is not obvious. Moreover, the frequency of use is low, and the user opens the freezing compartment door relatively less frequently, resulting in a small temperature fluctuation. The freezing compartment is also used to melt the ice layer on the surface of the evaporator, but it focuses more on long-term maintenance of the performance of the evaporator, and the period is relatively long. Since the temperature of the freezing compartment is low and the humidity is small, the defrosting period is relatively long, for example, once a day or longer.

[0126] When calculating the third temperature difference, the temperature of the refrigeration compartment 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 relatively quickly. Therefore, the temperature fluctuation is more significant in a short period of time. Higher humidity makes the temperature change more sensitive, and the situation where the door is not closed tightly can be captured earlier. Monitoring the temperature change in a shorter period of time can quickly identify abnormal situations and take timely measures.

[0127] When calculating the fifth temperature difference, the temperature of the freezing compartment is low. Even if the door is not closed tightly, the temperature change is relatively slow, and the fluctuation in a short period of time is not as significant as that of the refrigeration compartment. Lower humidity and fewer door opening times make the temperature change relatively stable, and it takes a longer time to observe significant temperature fluctuations.

[0128] To accurately capture the slight temperature change, in some embodiments, the fifth temperature value is the same as the value of the second preset time, which is 5-30, i.e., the fifth temperature value is 5-30℃, and the second preset time is 5-30 minutes. By using a longer detection time and a wider temperature range, temperature fluctuations can be detected.

[0129] After obtaining the fifth temperature difference, 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 the sealing of the freezing compartment is not a problem.

[0130] For example, the fifth temperature difference is 23℃, and the sixth temperature value is 20℃. 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℃ and the sixth temperature value is 3℃, then the sixth temperature difference is less than the sixth temperature value, and the detection is stopped, indicating that the freezing compartment does not have a sealing problem.

[0131] The sixth temperature difference is the difference between the evaporating temperature after the defrosting heater stops heating and the evaporating temperature when the next defrosting heater starts heating.

[0132] Although the temperature of the freezing compartment is low and changes relatively slowly, the change in the evaporating temperature in a short period of time after the defrosting heater stops heating can still provide valuable information, especially in the case where the door is not closed tightly. The cold air leakage will cause the evaporating 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, i.e., the sixth temperature value is 2-5℃, and the fifth preset time is 2-5 minutes. Moreover, a shorter monitoring time helps to improve the detection efficiency and reduce unnecessary energy consumption. Especially for the freezing compartment, a shorter monitoring time can also reduce additional energy consumption.

[0133] For example, if the fifth temperature difference is 5℃ and the sixth temperature value is 3℃, the fifth temperature difference is greater than the sixth temperature value, and the sixth temperature difference is obtained.

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

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

[0136] The seventh temperature value is 3-15, and when the sixth temperature difference is greater than or equal to the seventh temperature value, it indicates that the freezer compartment door is not tightly closed. The cloud server receives the detection result, generates corresponding alarm information according to the preset alarm logic and rules, and the alarm information may include the refrigerator 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: generating a detection result based on the first detection method or the second detection method.

[0138] The detection result is a door sealing detection result. It can be understood that the detection result is only one detection result, for example, the detection result is that the freezer door sealing is poor, or the detection result is that the refrigerator door sealing is poor, and there will be no two detection results.

[0139] Through the detection method, it can be effectively judged whether the refrigerator door is well sealed, and the cold air leakage and additional energy consumption can be avoided.

[0140] Based on the above-mentioned refrigerator door sealing detection method, some embodiments of the present application also provide a refrigeration equipment, which comprises a box body, a temperature sensor and a controller, the box body comprises a refrigeration compartment and a freezing compartment;

[0141] The temperature sensor is used to obtain the refrigeration compartment temperature and the freezing compartment temperature in 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 of comparing the refrigeration temperature and the evaporation temperature within a first preset time after the defrosting heater stops heating, and the second detection method is a freezing compartment detection rule, the second detection method is a detection method of comparing the freezing temperature and the evaporation temperature within a second preset time after the defrosting heater stops heating.

[0143] and generating a detection result based on the first detection method or the second detection method, the detection result being a door body sealing property detection result.

[0144] The refrigeration equipment provided by the embodiments of the present application can be a refrigerator. To achieve refrigeration and operation, the refrigerator at least includes a refrigeration system, a cooling system, a control system, and a cabinet. The refrigeration system is used to generate 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, and the cabinet is used to provide a storage space. It can be understood that the refrigeration system, the cooling system, and the control system include specific components that can achieve the above functions.

[0145] In some embodiments, the refrigeration system includes a compressor, a condenser, an evaporator, and a throttling device. The compressor is used to compress refrigerant gas to increase the pressure and temperature, thereby driving the refrigerant to flow in the system. During the compression process, the refrigerant changes from a low-pressure high-temperature gas to a high-pressure high-temperature gas, thereby generating a refrigeration effect. The condenser is used to cool the high-temperature high-pressure gas discharged by the compressor into a liquid state. The refrigerant gas is converted into a liquid state by releasing heat through the heat dissipation fins, and is ready for 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 gaseous state in the evaporator, absorbs heat from the surrounding environment, thereby achieving the purpose of reducing the temperature inside the refrigerator. The throttling device can include an expansion valve and a capillary tube, which is used to adjust the flow of the refrigerant, reduce its pressure, and change it into a low-temperature low-pressure gas-liquid mixed state, ready for entering 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 compartment and the refrigerator compartment, transfers heat to the evaporator, and helps maintain a low-temperature environment inside the refrigerator.

[0147] It also includes a defrosting heater for heating devices inside the refrigeration equipment, which is used to remove frost and ice on the evaporator. It should be noted that the above examples are only a simple division of the functions of the refrigerator, and do not limit the specific structure of the refrigeration equipment in the embodiments of the present application.

[0148] The specific embodiments provided above are only a few examples of the general concept of the present application, and do not limit the protection scope of the present application. Any other embodiments extended from the present application scheme without creative labor are within the protection scope of the present application.

Claims

1. A method of detecting a sealing property of a refrigerator door body, characterized by, The method comprises the following steps: During the defrosting period, the temperature of the refrigeration compartment and the temperature of the freezing compartment are obtained to obtain a first determination result; Based on the first determination result, a first detection method or a second detection method is generated, the first detection method is a refrigeration compartment detection method, the first detection method is a detection method of comparing the temperature of the refrigeration compartment and the evaporation temperature within a first preset time after the defrosting heater stops heating, the second detection method is a freezing compartment detection rule, and the second detection method is a detection method of comparing the temperature of the freezing compartment and the evaporation temperature within a second preset time after the defrosting 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 performance detection result; The method comprises the following steps: During the defrosting period, a first average value and a second average value are calculated, the first average value is the temperature average value of the refrigeration compartment, and the second average value is the temperature average value of the freezing compartment; If the temperature difference between the first average value and a first preset temperature is greater than or equal to a first temperature value, a first determination result is obtained, and the first determination result is a refrigeration compartment; If the temperature difference between the second average value and a second preset temperature is greater than or equal to a first temperature value, a first determination result is obtained, and the first determination result is a freezing compartment. 2.The refrigerator door body tightness detection method of claim 1, characterized in that, The method comprises the following steps: If the temperature difference between the first average value and a first preset temperature is greater than or equal to a first temperature value, and the temperature difference between the second average value and a second preset temperature is greater than or equal to a first temperature value, a first temperature difference and a second temperature difference are calculated, 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; If the first temperature difference is greater than or equal to the second temperature difference, a first determination result is obtained, and the first determination result is a refrigeration compartment; If the first temperature difference is less than the second temperature difference, a first determination result is obtained, and the first determination result is a freezing compartment. 3.The refrigerator door body tightness detection method of claim 2, characterized in that, The method comprises the following steps: If the first determination result is a refrigeration compartment, a first detection method is generated; The first detection method comprises: if the first temperature difference is greater than or equal to a second temperature value, a third temperature difference is obtained, the third temperature difference is the temperature difference between the highest temperature and the lowest temperature of the refrigeration compartment within a first preset time after the defrosting heater stops heating; If the third temperature difference is greater than or equal to a third temperature value, a fourth temperature difference is obtained, the fourth temperature difference is the difference between the evaporation temperature after a third preset time after the defrosting heater stops heating and the evaporation temperature when the defrosting heater starts heating next time. 4.The refrigerator door body tightness detection method of claim 3, characterized in that, The detection result comprises a first detection result. The method comprises the following steps: If the fourth temperature difference is greater than or equal to a fourth temperature value, a first detection result is generated, and the first detection result indicates that the sealing performance of the door body of the refrigeration compartment is poor. The first detection result is sent to the cloud to generate alarm information through the cloud. 5.The refrigerator door body tightness detection method of claim 4, characterized in that, The second temperature value is the same as the value of a first preset time, and the value is 3-6; the third temperature value is the same as the value of a third preset time, and the value is 1-4; and the fourth temperature value is 3-15. 6.The refrigerator door body tightness detection method of claim 2, characterized in that, The first detection method is generated based on the first judgment result, and the first detection method includes: If the first judgment result is a freezing compartment, a second detection method is generated. The second detection method includes: if the second temperature difference is greater than or equal to a fifth temperature value, a fifth temperature difference is obtained, the fifth temperature difference is the temperature difference between the highest temperature and the lowest temperature of the freezing compartment within a second preset time after the defrosting heater stops heating; If the fifth temperature difference is greater than or equal to a sixth temperature value, a sixth temperature difference is obtained, the sixth temperature difference is the difference between the evaporation temperature after a fifth preset time after the defrosting heater stops heating and the evaporation temperature when the defrosting heater starts heating next time. 7.The refrigerator door body tightness detection method of claim 6, characterized in that, The detection result further includes a second detection result; The detection result is generated based on the first detection method or the second detection method, and the detection result includes: If the sixth temperature difference is greater than or equal to a seventh temperature value, a second detection result is generated, and the second detection result indicates that the sealing performance of the door body of the freezing compartment is poor. The second detection result is sent to the cloud to generate alarm information through the cloud. 8.The refrigerator door body tightness detection method of claim 7, characterized in that, The fifth temperature value is the same as the value of a second preset time, and the value is 5-30; the sixth temperature value is the same as the value of a fifth preset time, and the value is 2-5; and the seventh temperature value is 3-15.

9. A refrigeration appliance characterized by, It includes: A box body, a temperature sensor, and a controller, the box body including a refrigeration compartment and a freezing compartment; The temperature sensor is configured to obtain the refrigeration compartment temperature and the freezing compartment temperature within a 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 being a refrigeration compartment detection method, the first detection method being a detection method by comparing the refrigeration compartment temperature and the evaporation temperature within a first preset time after the defrosting heater stops heating, and the second detection method being a freezing compartment detection method, the second detection method being a detection method by comparing the freezing compartment temperature and the evaporation temperature within a second preset time after the defrosting heater stops heating; and generate a detection result based on the first detection method or the second detection method, the detection result being a door body sealing performance detection result; The refrigeration compartment temperature and the freezing compartment temperature are obtained within a frosting period to obtain a first judgment result, and the first judgment result includes: Within the frosting period, a first average value and a second average value are calculated, the first average value being the temperature average value of the refrigeration compartment, and the second average value being the temperature average value of the freezing compartment; If a temperature difference between the first average value and a first preset temperature is greater than or equal to a first temperature value, a first determination result is obtained, and the first determination result is a cold storage compartment; If a temperature difference between the second average value and a second preset temperature is greater than or equal to the first temperature value, the first determination result is obtained, and the first determination result is a freezing compartment.

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