Refrigerator and door tightness warning method thereof

Abstract

The application discloses a refrigerator and a door closing warning method thereof. A magnetic core is arranged on a door body, an inductance coil is arranged on a box body, and a controller is used to acquire time when the door body is closed and a first resonance frequency generated by the resonance circuit when the door body is closed each time in each preset period. A first correspondence relationship between time and resonance frequency is constructed according to all the time and all the first resonance frequencies. A corresponding time threshold is obtained according to a preset resonance frequency threshold based on the first correspondence relationship. The refrigerator is controlled to perform warning according to a comparison result of a current time and the time threshold. The embodiment of the application can early warn the risk of the refrigerator door being not closed tightly, so that the user can repair and intervene in advance, the refrigeration effect in the refrigerator is ensured, food damage is avoided, and the user experience is affected.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and in particular to a refrigerator and a method for warning of a door not closing properly. Background Technology

[0002] Refrigerators are a common household appliance used in almost every home. They are consumer products that keep food or other items at a constant low temperature, preserving food and keeping it fresh. Most refrigerators currently use magnetic force to seal the door, preventing cold air from escaping and maintaining a relatively stable internal temperature. However, with increased use, reliability issues such as aging door seals, door sagging, and loose hinges can arise. These problems can collectively lead to the refrigerator door not closing properly, affecting cooling efficiency and causing food to spoil. Currently, most refrigerators only alarm when the door is not closed completely, lacking a warning system for situations where the door is not properly closed. Summary of the Invention

[0003] The purpose of this invention is to provide a refrigerator and a method for warning of a door not closing properly, which can provide early warning of the risk of the refrigerator door not closing properly, allowing users to report the problem in advance and intervene in advance, ensuring the cooling effect inside the refrigerator, avoiding food damage, and thus affecting the user experience.

[0004] To achieve the above objectives, embodiments of the present invention provide a refrigerator, comprising:

[0005] The cabinet, which serves as the supporting structure of the refrigerator, contains several storage compartments.

[0006] The door is located at the opening of the box body;

[0007] A magnetic core is disposed on the door body;

[0008] A resonant circuit is provided with an inductor coil, which is disposed on the housing. When the door is closed, the inductor coil is positioned opposite to the magnetic core, and the magnetic core is inserted into the inductor coil.

[0009] The controller is used to acquire the time when the door closes a number of times and the first resonant frequency generated by the resonant circuit each time the door closes within each preset period.

[0010] Construct a first correspondence between time and resonant frequency based on all the stated times and all the first resonant frequencies;

[0011] Based on the first correspondence, the corresponding time threshold is obtained according to the preset resonant frequency threshold;

[0012] Based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue an early warning.

[0013] As an improvement to the above scheme, the step of constructing a first correspondence between time and resonant frequency based on all the times and all the first resonant frequencies includes:

[0014] For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies;

[0015] Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, a fitting equation for time and resonant frequency is constructed.

[0016] As an improvement to the above solution, the refrigerator further includes a distance measuring module, which is disposed on the cabinet or the door, for detecting the gap distance between the door and the cabinet. The controller is then further used for:

[0017] The gap distance between the door and the box is obtained when the door closes several times, and the second resonant frequency generated by the resonant circuit each time the door closes.

[0018] A second correspondence between slot distance and resonant frequency is constructed based on all the aforementioned slot distances and all the second resonant frequencies;

[0019] Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

[0020] As an improvement to the above solution, the controller is also used for:

[0021] When the door is detected to be closed, the current resonant frequency generated by the resonant circuit is obtained;

[0022] When the current resonant frequency is greater than the resonant frequency threshold, the refrigerator is controlled to sound an alarm.

[0023] As an improvement to the above scheme, the resonant circuit further includes: a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in series, and the inductor being connected in parallel with the first capacitor and the second capacitor.

[0024] To achieve the above objectives, this invention provides a method for warning of a refrigerator door not closing properly. The refrigerator includes at least a resonant circuit with a magnetic core disposed on the door. The resonant circuit includes an inductor coil disposed on the refrigerator body. When the door is closed, the inductor coil is positioned opposite to the magnetic core, and the magnetic core is inserted into the inductor coil. The method for warning of a refrigerator door not closing properly includes:

[0025] Within each preset cycle, the time when the door closes and the first resonant frequency generated by the resonant circuit each time the door closes are obtained;

[0026] Construct a first correspondence between time and resonant frequency based on all the stated times and all the first resonant frequencies;

[0027] Based on the first correspondence, the corresponding time threshold is obtained according to the preset resonant frequency threshold;

[0028] Based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue an early warning.

[0029] As an improvement to the above scheme, the step of constructing a first correspondence between time and resonant frequency based on all the times and all the first resonant frequencies includes:

[0030] For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies;

[0031] Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, a fitting equation for time and resonant frequency is constructed.

[0032] As an improvement to the above solution, the refrigerator further includes a distance measuring module, which is disposed on the cabinet or the door, for detecting the gap distance between the door and the cabinet. Therefore, the refrigerator door not closing properly warning method further includes:

[0033] The gap distance between the door and the box is obtained when the door closes several times, and the second resonant frequency generated by the resonant circuit each time the door closes.

[0034] A second correspondence between slot distance and resonant frequency is constructed based on all the aforementioned slot distances and all the second resonant frequencies;

[0035] Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

[0036] As an improvement to the above solution, the refrigerator door not closing properly warning method further includes:

[0037] When the door is detected to be closed, the current resonant frequency generated by the resonant circuit is obtained;

[0038] When the current resonant frequency is greater than the resonant frequency threshold, the refrigerator is controlled to sound an alarm.

[0039] As an improvement to the above scheme, the resonant circuit further includes: a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in series, and the inductor being connected in parallel with the first capacitor and the second capacitor.

[0040] Compared with the prior art, the refrigerator and its door not closing properly warning method provided by the present invention have a magnetic core in the door and an inductor coil in the cabinet. When the refrigerator door is closed, the time when the door closes and the first resonant frequency generated by the resonant circuit composed of the inductor coil are obtained. A first correspondence between time and the first resonant frequency is established. Then, based on the first correspondence, a corresponding time threshold is obtained according to a preset resonant frequency threshold. Finally, based on the comparison result of the current time and the time threshold, the refrigerator is controlled to issue a warning to the user that the door is not closing properly. This allows the user to report the problem in advance, ensure the cooling effect inside the refrigerator, avoid food damage, and ensure a good user experience. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of a refrigeration system in a refrigerator provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of a resonant circuit provided in an embodiment of the present invention;

[0044] Figure 4 This is a first working flowchart of the controller in a refrigerator provided in an embodiment of the present invention;

[0045] Figure 5 This is a first structural block diagram of the control system provided in an embodiment of the present invention;

[0046] Figure 6 This is a second working flowchart of the controller in a refrigerator provided in an embodiment of the present invention;

[0047] Figure 7 This is a second structural block diagram of the control system provided in an embodiment of the present invention;

[0048] Figure 8 This is a third workflow diagram of the controller in a refrigerator provided in an embodiment of the present invention;

[0049] Figure 9 This is the fourth workflow diagram of the controller in the refrigerator provided in this embodiment of the invention;

[0050] Figure 10 This is a flowchart of a refrigerator door not closing properly warning method provided in an embodiment of the present invention;

[0051] Among them, 100 is the housing; 101 is the inductor coil; 200 is the door; 201 is the magnetic core; 300 is the resonant circuit; 400 is the display module; 500 is the buzzer; 600 is the wireless communication module; 700 is the ranging module; 1 is the compressor; 2 is the condenser; 3 is the anti-condensation tube; 4 is the dryer filter; 5 is the capillary tube; 6 is the evaporator; and 7 is the gas-liquid separator. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Figure 1 This is a perspective view of a specific embodiment of the refrigerator according to this application. See also... Figure 1 The refrigerator of this embodiment has an approximately rectangular parallelepiped shape. The refrigerator includes a cabinet 100 defining a storage space and multiple doors 200 located at the opening of the cabinet 100. Each door 200 includes a door shell located outside the cabinet 100, a door inner liner located inside the cabinet 100, an upper cover, a lower cover, and an insulation layer located between the door shell, door inner liner, upper cover, and lower cover; typically, the insulation layer is filled with foam material. The cabinet has chambers, including component storage chambers for placing refrigerator components, such as the compressor, and storage spaces for storing food. These storage spaces can be divided into multiple storage compartments, which, depending on their purpose, can be configured as refrigerator compartments, freezer compartments, or variable temperature compartments (also known as crisper compartments). Each storage compartment corresponds to one or more doors, for example, in… Figure 1 The upper storage compartment features double doors. These doors can be pivotally mounted at the opening of the cabinet or can open like drawers for drawer-style storage.

[0054] See Figure 2 , Figure 2 This is a schematic diagram of the refrigeration system in a refrigerator provided in an embodiment of the present invention. The refrigeration system includes a compressor 1, a condenser 2, an anti-condensation pipe 3, a dryer filter 4, a capillary tube 5, an evaporator 6, and a gas-liquid separator 7. The working process of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

[0055] The compression process is as follows: When the refrigerator power cord is plugged in and the thermostat contacts are closed, compressor 1 starts working. Low-temperature, low-pressure refrigerant is drawn into compressor 1 and compressed into high-temperature, high-pressure superheated gas within the compressor 1 cylinder before being discharged into condenser 2. The condensation process is as follows: The high-temperature, high-pressure refrigerant gas dissipates heat through condenser 2, its temperature continuously decreasing until it is gradually cooled into room-temperature, high-pressure saturated vapor, and further cooled into saturated liquid. The temperature at this point no longer decreases; this temperature is called the condensation temperature. The pressure of the refrigerant remains almost constant throughout the entire condensation process. (Throttling) The process is as follows: After condensation, the saturated liquid refrigerant flows into the capillary tube 5 after the moisture and impurities are removed by the dryer filter 4. The capillary tube 5 then throttles and reduces the pressure, turning the refrigerant into a room-temperature, low-pressure wet vapor. The evaporation process is as follows: The room-temperature, low-pressure wet vapor begins to absorb heat and vaporize in the evaporator 6, which not only lowers the temperature of the evaporator and its surroundings but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 6 passes through the gas-liquid separator 7 and returns to the compressor 1. The above process is repeated to transfer the heat inside the refrigerator to the outside air, thus achieving the purpose of refrigeration.

[0056] The fan continuously draws air into the fins of the evaporator 6 for heat exchange, while simultaneously sending the cooled air from the evaporator 6 through the air duct to the refrigerator compartment and the freezer compartment. In this way, the air in the storage compartment is constantly circulating, thereby achieving the purpose of lowering the temperature.

[0057] The refrigerator also includes:

[0058] A magnetic core 201 is disposed on the door body 200;

[0059] The resonant circuit 300 includes an inductor coil 101, which is disposed on the housing 100. When the door 200 is closed, the inductor coil 101 is positioned opposite to the magnetic core 201, and the magnetic core is inserted into the inductor coil.

[0060] For example, a protruding magnetic core 201 is pre-embedded at the inner edge of the door 200, and an inductor coil 101 is pre-embedded at the corresponding position on the edge of the housing 100, so that when the door 200 is closed, the inductor coil 101 and the magnetic core 201 are positioned opposite each other, and the magnetic core 201 can be inserted into the inductor coil 101; it can be understood that when the door 200 is closed tightly, the magnetic core 201 on the door 200 is fully inserted into the inductor coil 101 on the housing 100, and at this time the inductance of the inductor coil 101 is a set threshold L0; when the door 200 is not closed tightly, the door... If the magnetic core 201 on the door 200 cannot be fully inserted into the inductor coil 101 on the housing 100, the inductance of the inductor coil 101 will change to L1. It can be seen that when the gap distance between the door 200 and the housing 100 changes, the inductance of the inductor coil 101 will change accordingly. Furthermore, according to the parallel resonant frequency formula, the change in inductance will also bring about a change in the resonant frequency. Therefore, when the gap distance between the door 200 and the housing 100 changes, the resonant frequency generated by the resonant circuit will also change accordingly.

[0061] like Figure 3 As shown, the resonant circuit 300 further includes: a first capacitor C1 and a second capacitor C2, the first capacitor C1 and the second capacitor C2 are connected in series, and the inductor coil 101 is connected in parallel with the first capacitor C1 and the second capacitor C2; the resonant circuit 300 is connected to the controller.

[0062] Therefore, the formula for the parallel resonant frequency is:

[0063]

[0064] Where f represents the resonant frequency, L represents the inductance of the inductor coil, C1 represents the capacitance of the first capacitor, and C2 represents the capacitance of the second capacitor.

[0065] It is understandable that if the capacitance of the first capacitor and the capacitance of the second capacitor remain unchanged, a change in the inductance L will also change the resonant frequency f.

[0066] The controller is used to acquire the time when the door closes a number of times and the first resonant frequency generated by the resonant circuit each time the door closes within each preset period.

[0067] Construct a first correspondence between time and resonant frequency based on all the stated times and all the first resonant frequencies;

[0068] Based on the first correspondence, the corresponding time threshold is obtained according to the preset resonant frequency threshold;

[0069] Based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue an early warning.

[0070] For example, see Figure 4 , Figure 4 This is a first flowchart of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S11 to S16:

[0071] S11. In each preset cycle, detect whether the door is closed. If yes, proceed to step S12; otherwise, return to step S11.

[0072] S12. Obtain the time when the door closes and the first resonant frequency generated by the resonant circuit, and proceed to step S13.

[0073] S13. Determine whether all the times and all the first resonant frequencies of the first preset number of shutdowns within each preset period have been obtained. If yes, proceed to step S14; otherwise, proceed to step S11.

[0074] S14. Construct a first correspondence between time and resonant frequency based on all the times and all the first resonant frequencies, and proceed to step S15.

[0075] S15. Based on the first correspondence, obtain the corresponding time threshold according to the preset resonant frequency threshold, and proceed to step S16.

[0076] S16. Based on the comparison result of the current time and the time threshold, control the refrigerator to issue an early warning and end this process.

[0077] Specifically, the preset period is 10 days, and the first preset number of closures is 10 times. Then, the time when the door closes 10 times and the first resonant frequency generated by the resonant circuit each time the door closes are recorded within 10 days. The above operation is repeated to record the door closing data (time and first resonant frequency) for the next 10 days until all the door closing data within the preset period are obtained.

[0078] A first correspondence between time and resonant frequency is established using all recorded times and the first resonant frequency. A preset resonant frequency threshold is substituted into this first correspondence to calculate a time threshold. This resonant frequency threshold is the resonant frequency at which the refrigerator door will not close properly when the refrigerator is closed. It is understood that when the refrigerator is at the resonant frequency threshold, the gap between the refrigerator body and the door reaches a preset gap distance threshold. This gap distance threshold is the distance between the refrigerator body and the door when the refrigerator door does not close properly. Therefore, at this time, it is considered that the refrigerator door will not close properly. Thus, the time threshold obtained based on the resonant frequency threshold is the predicted time when the refrigerator door will not close properly. The current time t of the current environment is compared with the time threshold t. 阈值The comparison is made to obtain the comparison results, and then the refrigerator is controlled to issue an early warning based on the comparison results.

[0079] When the comparison result is less than a preset warning time threshold N, the refrigerator is controlled to issue a warning; when the comparison result is greater than or equal to the warning time threshold N, the refrigerator is controlled not to issue a warning. For example, when t 阈值 When -t < N, it is assumed that the time for the refrigerator door to not close properly is approaching, and the refrigerator will issue a warning. For example... Figure 5 As shown, the refrigerator also includes a display module 400, and the controller is further used to control the display module 400 to display warning information. The refrigerator also includes a buzzer 500, and the controller is further used to control the buzzer 500 to emit a warning alarm. The refrigerator also includes a wireless communication module 600, and the controller is further used to control the wireless communication module 600 to send warning information to the user APP, so that the user APP receives the warning information and displays it.

[0080] In an optional embodiment, constructing a first correspondence between time and resonant frequency based on all said times and all first resonant frequencies includes:

[0081] For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies;

[0082] Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, a fitting equation for time and resonant frequency is constructed.

[0083] For example, see Figure 6 , Figure 6 This is a second workflow diagram of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S141 to S143:

[0084] S141. For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies, and proceed to step S142.

[0085] S142. Determine whether the median of all the first resonant frequencies within all preset periods and the time corresponding to the median of the first resonant frequencies have been obtained. If yes, proceed to step S143; otherwise, return to step S141.

[0086] S143. Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, construct a fitting equation for time and resonant frequency.

[0087] Specifically, the reliability growth equation (t, f) is fitted by an algorithm. For example, the simplest one is a linear distribution f(t) = a*f + b. The reliability growth equation can be obtained by taking the median of all first resonant frequencies in at least two preset periods and the time corresponding to the median of the first resonant frequency.

[0088] In an alternative embodiment, such as Figure 7 As shown, the refrigerator also includes a distance measuring module 700, which is disposed on the cabinet 100 or the door 200, for detecting the gap distance between the door 200 and the cabinet 100. The controller is further used for:

[0089] The gap distance between the door and the box is obtained when the door closes several times, and the second resonant frequency generated by the resonant circuit each time the door closes.

[0090] A second correspondence between slot distance and resonant frequency is constructed based on all the aforementioned slot distances and all the second resonant frequencies;

[0091] Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

[0092] For example, see Figure 8 , Figure 8 This is a third flowchart of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S17 to S21:

[0093] S17. Detect whether the door is closed. If yes, proceed to step S18; otherwise, return to step S17.

[0094] S18. Obtain the gap distance between the door and the box detected by the ranging module when the door is closed and the second resonant frequency generated by the resonant circuit, and proceed to step S19.

[0095] S19. Determine whether all gap distances and the second resonant frequency of the second preset number of closing times have been obtained. If yes, proceed to step S20; otherwise, return to step S17.

[0096] S20. Construct a second correspondence between gap distance and resonant frequency based on all the gap distances and all the second resonant frequencies, and proceed to step S21;

[0097] S21. Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

[0098] Specifically, the ranging module 700 is located near the magnetic core 201 or the inductor coil 101 and is used to detect the gap distance between the door 200 and the cabinet 100. A second correspondence between the gap distance and the resonant frequency generated by the resonant circuit is constructed based on the gap distance between the door and the cabinet when the door is closed. A preset gap distance threshold is substituted into the second correspondence to obtain the preset resonant frequency threshold. This gap distance threshold is the gap distance between the door and the cabinet when the refrigerator door does not close properly when the door is closed. Substituting this gap distance threshold into the second correspondence yields the resonant frequency when the refrigerator door does not close properly, i.e., the resonant frequency threshold.

[0099] In an alternative embodiment, the controller is further configured to:

[0100] When the door is detected to be closed, the current resonant frequency generated by the resonant circuit is obtained;

[0101] When the current resonant frequency is greater than the resonant frequency threshold, the refrigerator is controlled to sound an alarm.

[0102] For example, see Figure 9 , Figure 9 This is a fourth flowchart of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S22 to S23:

[0103] S22. Detect whether the door is closed. If yes, proceed to step S23; otherwise, return to step S21.

[0104] S23. Obtain the current resonant frequency generated by the resonant circuit, and proceed to step S24;

[0105] S24. Determine whether the current resonant frequency is greater than the resonant frequency threshold. If yes, proceed to step S25. If no, end the current process.

[0106] S25. Control the refrigerator to sound an alarm.

[0107] Specifically, when the resonant frequency threshold is obtained according to the second correspondence, the resonant frequency generated by the resonant circuit when the door is not closed tightly is known. At this time, if the current resonant frequency generated by the resonant circuit when the door is closed is greater than the resonant frequency threshold, it is considered that the door is not closed tightly and the refrigerator is controlled to alarm. For example, the controller is also used to control the display module 400 to display alarm information and / or control the buzzer 500 to issue an alarm alarm and / or control the wireless communication module 600 to send alarm information to the user APP, so that the user APP can receive the alarm information and display it.

[0108] This invention provides a refrigerator that incorporates a magnetic core in the door and an inductor coil in the cabinet. When the refrigerator door closes, the time of closing and the first resonant frequency generated by the resonant circuit formed by the inductor coil are obtained. A first correspondence between time and the first resonant frequency is established. Then, based on this first correspondence, a corresponding time threshold is obtained according to a preset resonant frequency threshold. Finally, based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue a warning to the user that the door is not properly closed. This allows the user to report the problem in advance, ensuring the refrigerator's cooling effect, preventing food damage, and guaranteeing a better user experience.

[0109] See Figure 7 , Figure 7 This is a flowchart of a refrigerator door not closing properly warning method provided by an embodiment of the present invention. The refrigerator includes at least a resonant circuit with a magnetic core disposed on the door body. The resonant circuit includes an inductor coil disposed on the cabinet body. When the door body is closed, the inductor coil is positioned opposite to the magnetic core, and the magnetic core is inserted into the inductor coil. The refrigerator door not closing properly warning method includes:

[0110] S1. Within each preset period, obtain the time when the door closes a number of times and the first resonant frequency generated by the resonant circuit each time the door closes;

[0111] S2. Construct a first correspondence between time and resonant frequency based on all the stated times and all the first resonant frequencies;

[0112] S3. Based on the first correspondence, obtain the corresponding time threshold according to the preset resonant frequency threshold;

[0113] S4. Based on the comparison result of the current time and the time threshold, control the refrigerator to issue an early warning.

[0114] For example, a raised magnetic core 201 is pre-embedded at the inner edge of the door 200, and an inductor coil 101 is pre-embedded at a corresponding position on the edge of the housing 100. This ensures that when the door 200 is closed, the inductor coil 101 and the magnetic core 201 are positioned opposite each other, and the magnetic core 201 can be inserted into the inductor coil 101. It can be understood that when the door 200 is closed tightly, the magnetic core 201 on the door 200 is fully inserted into the inductor coil 101 on the housing 100. At this time, the inductance of the inductor coil 101 is a set threshold L0. When the door 200 is not closed tightly… If the magnetic core 201 on the door 200 cannot be fully inserted into the inductor coil 101 on the box 100, the inductance of the inductor coil 101 will change to L1. It can be seen that when the gap distance between the door 200 and the box 100 changes, the inductance of the inductor coil will change accordingly. Furthermore, according to the parallel resonant frequency formula, the change in inductance will also bring about a change in the resonant frequency. Therefore, when the gap distance between the door 200 and the box 100 changes, the resonant frequency generated by the resonant circuit will also change accordingly.

[0115] Substituting the preset resonant frequency threshold into the first correspondence, a time threshold is calculated. This resonant frequency threshold is the resonant frequency at which the refrigerator door will not close properly when the refrigerator is closed. It can be understood that when the refrigerator is at the resonant frequency threshold, the gap between the refrigerator body and the door reaches a preset gap distance threshold. This gap distance threshold is the distance between the refrigerator body and the door when the refrigerator door does not close properly. Therefore, at this time, it is considered that the refrigerator door is not closed properly. Thus, the time threshold obtained based on the resonant frequency threshold is the predicted time when the refrigerator door will not close properly. The current time t in the current environment is compared with the time threshold t. 阈值 The comparison is made to obtain the comparison results, and then the refrigerator is controlled to issue an early warning based on the comparison results.

[0116] When the comparison result is less than a preset warning time threshold N, the refrigerator is controlled to issue a warning; when the comparison result is greater than or equal to the warning time threshold N, the refrigerator is controlled not to issue a warning. For example, when t 阈值 When -t < N, it is assumed that the time for the refrigerator door to not close properly is approaching, and the refrigerator will issue a warning. For example... Figure 5 As shown, the refrigerator also includes a display module, and the controller is further used to control the display module to display warning information. The refrigerator also includes a buzzer, and the controller is further used to control the buzzer to emit a warning alarm. The refrigerator also includes a wireless communication module, and the controller is further used to control the wireless communication module to send warning information to the user APP, so that the user APP receives the warning information and displays it.

[0117] Optionally, constructing a first correspondence between time and resonant frequency based on all said times and all first resonant frequencies includes:

[0118] For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies;

[0119] Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, a fitting equation for time and resonant frequency is constructed.

[0120] Specifically, the reliability growth equation (t, f) is fitted by an algorithm. For example, the simplest one is a linear distribution f(t) = a*f + b. The reliability growth equation can be obtained by taking the median of all first resonant frequencies in at least two preset periods and the time corresponding to the median of the first resonant frequency.

[0121] Optionally, the refrigerator further includes a distance measuring module, which is disposed on the cabinet or the door, for detecting the gap distance between the door and the cabinet. Then, the refrigerator door not closing properly warning method further includes:

[0122] The gap distance between the door and the box is obtained when the door closes several times, and the second resonant frequency generated by the resonant circuit each time the door closes.

[0123] A second correspondence between slot distance and resonant frequency is constructed based on all the aforementioned slot distances and all the second resonant frequencies;

[0124] Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

[0125] Specifically, the ranging module 700 is located near the magnetic core 201 or the inductor coil 101 and is used to detect the gap distance between the door 200 and the cabinet 100. A second correspondence between the gap distance and the resonant frequency generated by the resonant circuit is constructed based on the gap distance between the door and the cabinet when the door is closed. A preset gap distance threshold is substituted into the second correspondence to obtain the preset resonant frequency threshold. This gap distance threshold is the gap distance between the door and the cabinet when the refrigerator door does not close properly when the door is closed. Substituting this gap distance threshold into the second correspondence yields the resonant frequency when the refrigerator door does not close properly, i.e., the resonant frequency threshold.

[0126] Optionally, the refrigerator door not closing properly warning method further includes:

[0127] When the door is detected to be closed, the current resonant frequency generated by the resonant circuit is obtained;

[0128] When the current resonant frequency is greater than the resonant frequency threshold, the refrigerator is controlled to sound an alarm.

[0129] Specifically, when the resonant frequency threshold is obtained according to the second correspondence, the resonant frequency generated by the resonant circuit when the door is not closed tightly is known. At this time, if the current resonant frequency generated by the resonant circuit when the door is closed is greater than the resonant frequency threshold, it is considered that the door is not closed tightly and the refrigerator is controlled to alarm. For example, the controller is also used to control the display module 400 to display alarm information and / or control the buzzer 500 to issue an alarm alarm and / or control the wireless communication module 600 to send alarm information to the user APP, so that the user APP can receive the alarm information and display it.

[0130] Optionally, the resonant circuit further includes: a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in series, and the inductor being connected in parallel with the first capacitor and the second capacitor.

[0131] It is understandable that if the capacitance of the first capacitor and the capacitance of the second capacitor remain unchanged, a change in the inductance L will also change the resonant frequency f.

[0132] Compared with existing technologies, the present invention provides a refrigerator door not closing properly warning method. This method involves equipping the door with a magnetic core and the refrigerator body with an inductor coil. When the refrigerator door closes, the method acquires the time of closing and the first resonant frequency generated by the resonant circuit formed by the inductor coil. A first correspondence between time and the first resonant frequency is established. Then, based on this first correspondence, a corresponding time threshold is obtained according to a preset resonant frequency threshold. Finally, based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue a warning to the user, indicating that the door is not closing properly. This allows the user to report the problem in advance, ensuring the refrigerator's cooling effect, preventing food damage, and guaranteeing a better user experience.

[0133] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that, include: The cabinet, which serves as the supporting structure of the refrigerator, contains several storage compartments. The door is located at the opening of the box body; A magnetic core is disposed on the door body; A resonant circuit is provided with an inductor coil, which is disposed on the housing. When the door is closed, the inductor coil is positioned opposite to the magnetic core, and the magnetic core is inserted into the inductor coil. Controller, for Within each preset cycle, the time when the door closes and the first resonant frequency generated by the resonant circuit each time the door closes are obtained; Construct a first correspondence between time and resonant frequency based on all the stated times and all the first resonant frequencies; Based on the first correspondence, the corresponding time threshold is obtained according to the preset resonant frequency threshold; Based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue an early warning.

2. The refrigerator as described in claim 1, characterized in that, The step of constructing a first correspondence between time and resonant frequency based on all the times and all the first resonant frequencies includes: For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies; Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, a fitting equation for time and resonant frequency is constructed.

3. The refrigerator as described in claim 1, characterized in that, The refrigerator also includes a distance measuring module, which is disposed on the cabinet or the door, for detecting the gap distance between the door and the cabinet. The controller is further used for: The gap distance between the door and the box is obtained when the door closes several times, and the second resonant frequency generated by the resonant circuit each time the door closes. A second correspondence between slot distance and resonant frequency is constructed based on all the aforementioned slot distances and all the second resonant frequencies; Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

4. The refrigerator as described in claim 3, characterized in that, The controller is also used for: When the door is detected to be closed, the current resonant frequency generated by the resonant circuit is obtained; When the current resonant frequency is greater than the resonant frequency threshold, the refrigerator is controlled to sound an alarm.

5. The refrigerator as described in claim 1, characterized in that, The resonant circuit further includes: a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in series, and the inductor being connected in parallel with the first capacitor and the second capacitor.

6. A method for issuing an early warning for a refrigerator door that cannot be closed properly, characterized in that, The refrigerator includes at least a resonant circuit and a magnetic core disposed on the door. The resonant circuit includes an inductor coil disposed on the refrigerator body. When the door is closed, the inductor coil and the magnetic core are positioned opposite each other, and the magnetic core is inserted into the inductor coil. The refrigerator door not closing properly warning method includes: Within each preset cycle, the time when the door closes and the first resonant frequency generated by the resonant circuit each time the door closes are obtained; Construct a first correspondence between time and resonant frequency based on all the stated times and all the first resonant frequencies; Based on the first correspondence, the corresponding time threshold is obtained according to the preset resonant frequency threshold; Based on the comparison between the current time and the time threshold, the refrigerator is controlled to issue an early warning.

7. The refrigerator door not closing properly warning method as described in claim 6, characterized in that, The step of constructing a first correspondence between time and resonant frequency based on all the times and all the first resonant frequencies includes: For each preset period, obtain the median of all first resonant frequencies within the preset period and the time corresponding to the median of the first resonant frequencies; Using the median of the first resonant frequency as the independent variable and the time corresponding to the median of the first resonant frequency as the dependent variable, a fitting equation for time and resonant frequency is constructed.

8. The refrigerator door not closing properly warning method as described in claim 6, characterized in that, The refrigerator also includes a distance measuring module, which is installed on the cabinet or the door, for detecting the gap distance between the door and the cabinet. Therefore, the refrigerator door not closing properly warning method further includes: The gap distance between the door and the box is obtained when the door closes several times, and the second resonant frequency generated by the resonant circuit each time the door closes. A second correspondence between slot distance and resonant frequency is constructed based on all the aforementioned slot distances and all the second resonant frequencies; Based on the second correspondence, the resonant frequency threshold is obtained according to the preset gap distance threshold.

9. The refrigerator door not closing properly warning method as described in claim 8, characterized in that, The refrigerator door not closing properly warning method also includes: When the door is detected to be closed, the current resonant frequency generated by the resonant circuit is obtained; When the current resonant frequency is greater than the resonant frequency threshold, the refrigerator is controlled to sound an alarm.

10. The refrigerator door not closing properly warning method as described in claim 6, characterized in that, The resonant circuit further includes: a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in series, and the inductor being connected in parallel with the first capacitor and the second capacitor.

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