Refrigerator and self-learning detection method thereof

Abstract

The invention discloses a refrigerator and a self-learning detection method thereof. The refrigerator comprises a refrigerator body, a refrigerating system, a sensor and a controller. The controller is configured to perform refrigeration detection on at least one compartment after entering a self-learning detection mode to obtain the temperatures of the sensor before and after refrigeration and the refrigeration time of the compartment, and whether the compartment is abnormal or not during refrigeration is judged; performing defrosting detection on at least one chamber to obtain the temperatures of the sensor before and after defrosting and the defrosting time of the chamber, and judging whether the chamber is abnormal or not during defrosting; if the chamber is abnormal during refrigeration or defrosting, whether a sensor is installed reversely exists or not is judged through a self-correction algorithm; if the sensor is installed reversely, performing self-correction and then entering the self-learning detection mode again; and if the sensor is not installed reversely, abnormal information is fed back. According to the invention, the automatic detection of the refrigerator is realized, the labor is saved, the maintenance cost is reduced, and the detection accuracy and the detection efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a self-learning detection method thereof. Background Art

[0002] If there are problems with the refrigerator during use, or before leaving the factory, in order to ensure the product quality of the refrigerator and to troubleshoot the refrigerator with problems, a series of quality inspections are required for the refrigerator. During the current refrigerator production line inspection process, a large number of sensor probes for monitoring the temperature of each compartment of the refrigerator need to be installed, and the construction of the refrigerator inspection line is relatively high. In addition, the inspection requires the operator to operate to enter the inspection mode, and the inspector needs to accurately arrange the points in each compartment of the refrigerator, and the inspection process is complex and complicated. The inspection result also requires the inspector to go to the control room to see the refrigeration curve obtained by the test, and judge whether the refrigerator is qualified according to the refrigeration curve. The inspection requires the inspector to judge based on experience, and there is a high possibility of misjudgment and missed judgment. The existing refrigerator production inspection method has complex inspection steps, many processes, high personnel costs, and high production line construction costs; the judgment requires experience, the personnel are poorly replaceable, and it is easy to make misjudgments and missed judgments; if there is a problem with the product, it can only be sent to the repair line, and some problems cannot be solved by self-repair. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a refrigerator and a self-learning detection method thereof, which can autonomously identify whether the refrigerator load is normal and self-repair the problem of sensor misinstallation through the automatic learning method, thereby realizing automatic detection of the refrigerator, saving labor, reducing maintenance costs, and improving detection accuracy and efficiency.

[0004] A refrigerator provided in a first embodiment of the present invention includes:

[0005] The box body, which serves as the supporting structure of the refrigerator, has several compartments inside;

[0006] A refrigeration system, which is arranged in the box, includes a compressor, an evaporator, a condenser, a fan and an expansion valve;

[0007] A sensor is arranged in each of the compartments, and the sensor includes a temperature sensor and an evaporation sensor; the temperature sensor is used to detect the temperature of the compartment; the evaporation sensor is used to detect the temperature of the evaporator of the compartment;

[0008] The controller is configured to, after the refrigerator enters the self-learning detection mode, perform refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment; perform defrosting detection on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment; determine whether there is an abnormality in the compartment during refrigeration based on the temperature of the sensor before and after refrigeration and the refrigeration time; determine whether there is an abnormality in the compartment during defrosting based on the temperature of the sensor before and after defrosting and the defrosting time; if there is an abnormality in the compartment during refrigeration or during defrosting, determine whether there is an inverted installation of the sensor through a self-correction algorithm; if there is an inverted installation of the sensor, perform self-correction and re-enter the self-learning detection mode; if there is no inverted installation of the sensor, feedback abnormal information.

[0009] In the refrigerator provided in the second embodiment of the present invention, before the refrigerator enters the self-learning detection mode, the controller is further configured as follows:

[0010] After the refrigerator is powered on, detecting the operating state of the sensor to determine whether the sensor is faulty;

[0011] Detecting the operating status of the fan to determine whether the fan has a fault;

[0012] Acquire the temperatures of the temperature sensor, the evaporation sensor, and the ambient temperature sensor, and determine whether a first temperature difference between the ambient temperature sensor and the temperature sensor and a second temperature difference between the ambient temperature sensor and the evaporation sensor are both less than a preset temperature difference value;

[0013] Obtaining the number of times the self-learning detection mode is entered, and determining whether the number is less than a preset number;

[0014] When the sensor is not faulty, the fan is not faulty, the first temperature difference and the second temperature difference are both smaller than the preset temperature difference value, and the number of times is smaller than the preset number of times, the refrigerator enters the self-learning detection mode.

[0015] In the refrigerator provided in the third embodiment of the present invention, the performing refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment specifically includes:

[0016] The compartment starts to cool, and when it is detected that the temperature of the temperature sensor drops by a first preset temperature and the temperature of the evaporation sensor is lower than a second preset temperature, the compartment stops cooling;

[0017] The first temperature of the temperature sensor before starting refrigeration, the second temperature of the temperature sensor when stopping refrigeration, the first evaporation temperature of the evaporation sensor before starting refrigeration, the second evaporation temperature of the evaporation sensor when stopping refrigeration, and the refrigeration time of the compartment are collected.

[0018] In a refrigerator provided in a fourth embodiment of the present invention, judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time specifically includes:

[0019] Calculating a first cooling temperature difference of the temperature sensor before and after cooling according to the first temperature and the second temperature;

[0020] calculating a second refrigeration temperature difference of the evaporation sensor before and after refrigeration according to the first evaporation temperature and the second evaporation temperature;

[0021] Determine whether the refrigeration time is less than a preset refrigeration time, and within the preset refrigeration time, whether the second refrigeration temperature difference is greater than the first refrigeration temperature difference, and whether the first refrigeration temperature difference is greater than a third preset temperature;

[0022] If the cooling time is not less than the preset cooling time, or, within the preset cooling time, the second cooling temperature difference is not greater than the first cooling temperature difference, or, the first cooling temperature difference is not greater than the third preset temperature, it is determined that there is an abnormality in the cooling of the compartment.

[0023] The refrigerator provided in the fifth embodiment of the present invention, wherein judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time, further comprises:

[0024] If there are multiple detected compartments, calculate the first refrigeration temperature difference of the temperature sensor of each compartment before and after refrigeration, and the second refrigeration temperature difference of the evaporation sensor of each compartment before and after refrigeration;

[0025] Determine whether the refrigeration time is less than the preset refrigeration time; within the preset refrigeration time, whether the second refrigeration temperature difference of the current detection compartment is greater than the first refrigeration temperature difference, whether the first refrigeration temperature difference is greater than the third preset temperature, and whether the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are both less than the third preset temperature;

[0026] If the refrigeration time is not less than the preset refrigeration time, or, within the preset refrigeration time, the second refrigeration temperature difference of the current detection compartment is not greater than the first refrigeration temperature difference, or, the first refrigeration temperature difference is not greater than the third preset temperature, or, the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are not less than the third preset temperature, it is determined that there is an abnormality in the refrigeration of the compartment.

[0027] In a refrigerator provided in a sixth embodiment of the present invention, the defrosting detection of at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment specifically includes:

[0028] The compartment starts to defrost, and when it is detected that the temperature of the evaporation sensor is not less than a fourth preset temperature, the compartment stops defrosting;

[0029] The third temperature of the temperature sensor before starting defrosting, the fourth temperature of the temperature sensor when stopping defrosting, the third evaporation temperature of the evaporation sensor before starting defrosting, the fourth evaporation temperature of the evaporation sensor when stopping defrosting and the defrosting time of the compartment are collected.

[0030] In the refrigerator provided in the seventh embodiment of the present invention, judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time specifically includes:

[0031] calculating a first defrosting temperature difference of the temperature sensor before and after defrosting according to the third temperature and the fourth temperature;

[0032] calculating a second defrosting temperature difference of the evaporation sensor before and after defrosting according to the third evaporation temperature and the fourth evaporation temperature;

[0033] Determine whether the defrost time is less than a preset defrost time, and within the preset defrost time, whether the second defrost temperature difference is not less than a fifth preset temperature, and whether the second defrost temperature difference is greater than the first defrost temperature difference;

[0034] If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, it is determined that there is an abnormality in the defrosting of the compartment.

[0035] In the refrigerator provided in the eighth embodiment of the present invention, judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time specifically includes:

[0036] If there are multiple detected compartments, calculate the first defrosting temperature difference of the temperature sensor of each compartment before and after defrosting, and the second defrosting temperature difference of the evaporation sensor of each compartment before and after defrosting;

[0037] Determine whether the defrost time is less than the preset defrost time; within the preset defrost time, whether the second defrost temperature difference of the current detection chamber is not less than the fifth preset temperature, whether the second defrost temperature difference is greater than the first defrost temperature difference, and whether the first defrost temperature difference and the second defrost temperature difference of other chambers are both less than the second defrost temperature difference of the current detection chamber;

[0038] If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference of the current detection chamber is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, or, the first defrost temperature difference and the second defrost temperature difference of other chambers are not less than the second defrost temperature difference of the current detection chamber, it is determined that there is an abnormality in the defrosting of the chamber.

[0039] In the refrigerator provided in the ninth embodiment of the present invention, the self-correction algorithm specifically includes:

[0040] Obtaining the temperature difference of the sensors of all compartments before and after refrigeration and before and after defrosting;

[0041] A first sensor combination is obtained according to the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments, the sensor corresponding to the second largest temperature difference, and the sensor corresponding to the largest temperature difference in the defrosting detection of each of the compartments;

[0042] If the first sensor in the first sensor combination is the second sensor in the second sensor combination, and the second sensor in the first sensor combination is the first sensor in the second sensor combination, it is determined that the sensors are installed reversely, and the sensors installed reversely are the first sensor and the second sensor; wherein, in the second sensor combination, the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments is the evaporation sensor of the current detection compartment, the sensor corresponding to the second largest temperature difference is the temperature sensor of the current detection compartment, and the sensor corresponding to the largest temperature difference in the defrost detection of each of the compartments is the evaporation sensor of the current detection compartment.

[0043] In the self-learning detection method of a refrigerator provided in the tenth embodiment of the present invention, the self-learning detection method is applied to a refrigerator including a box, a refrigeration system and a sensor, wherein a plurality of compartments are provided inside the box, the refrigeration system includes a compressor, an evaporator, a condenser, a fan and an expansion valve, the sensor is provided in each of the compartments, including a temperature sensor and an evaporation sensor, the temperature sensor is used to detect the temperature of the compartment, the evaporation sensor is used to detect the temperature of the evaporator of the compartment, and the self-learning detection method includes:

[0044] After the refrigerator enters the self-learning detection mode, a refrigeration detection is performed on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment; a defrosting detection is performed on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment;

[0045] According to the temperature of the sensor before and after refrigeration and the refrigeration time, judging whether there is an abnormality in the compartment during refrigeration; according to the temperature of the sensor before and after defrosting and the defrosting time, judging whether there is an abnormality in the compartment during defrosting;

[0046] If there is an abnormality in the compartment during refrigeration or defrosting, it is determined through a self-correction algorithm whether the sensor is installed reversely; if the sensor is installed reversely, self-correction is performed and the self-learning detection mode is re-entered; if the sensor is not installed reversely, abnormal information is fed back.

[0047] Compared with the prior art, the beneficial effects of a refrigerator and its self-learning detection method provided by the embodiment of the present invention are: through the self-learning detection mode, it can autonomously identify whether the load of each compartment of the refrigerator is normal, realize the automatic detection of the refrigerator, save labor, and improve the detection accuracy and detection efficiency; through the self-correction algorithm, the problem of sensor installation is automatically repaired, which reduces the maintenance cost and improves the efficiency of refrigerator maintenance; by memorizing the number of times the self-learning detection mode is entered, the automatic detection mode of the refrigerator is only used during production detection or user refrigerator maintenance detection, avoiding the user from mistakenly entering the self-learning detection mode when using the refrigerator, and ensuring the user experience. The embodiment of the present invention realizes the automatic detection of the refrigerator, reduces the manual operation steps, saves labor, reduces the maintenance cost, and at the same time improves the detection accuracy and detection efficiency, ensuring the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a structural schematic diagram of a refrigerator provided by an embodiment of the present invention;

[0049] Figure 2 It is a structural schematic diagram of a refrigerator body provided by one embodiment of the present invention;

[0050] Figure 3 It is a structural schematic diagram of a single refrigeration system of a refrigerator provided by an embodiment of the present invention;

[0051] Figure 4 It is a structural schematic diagram of a dual refrigeration system of a refrigerator provided by one embodiment of the present invention;

[0052] Figure 5 It is a flow chart of a controller in a refrigerator provided by an embodiment of the present invention before entering a self-learning detection mode;

[0053] Figure 6 It is a schematic diagram of a flow chart of refrigeration detection of a compartment in a refrigerator provided by an embodiment of the present invention;

[0054] Figure 7 It is a schematic diagram of a process of refrigeration detection of multiple compartments in a refrigerator provided by an embodiment of the present invention;

[0055] Figure 8 It is a schematic diagram of a process of defrosting detection of a compartment in a refrigerator provided by an embodiment of the present invention;

[0056] Fig. 9 It is a schematic diagram of a process of defrosting detection of multiple compartments in a refrigerator provided by an embodiment of the present invention;

[0057] Fig.10 It is a flow chart of a self-learning detection method for a refrigerator provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] See also Figure 1 , Figure 1 : is a schematic diagram of the structure of a refrigerator provided in one embodiment of the present invention. The refrigerator provided in the embodiment of the present invention comprises:

[0063] The box body 10, which serves as the supporting structure of the refrigerator, is provided with a plurality of compartments inside;

[0064] A refrigeration system 20 is provided in the housing 10 and includes a compressor, a condenser, an evaporator and a fan. The compressor is used to provide power for the refrigeration cycle of the refrigerator. The fan is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the heat-released air to the refrigerator compartment.

[0065] A sensor 30 is provided in each of the compartments, and the sensor includes a temperature sensor and an evaporation sensor; the temperature sensor is used to detect the temperature of the compartment; the evaporation sensor is used to detect the temperature of the evaporator of the compartment;

[0066] The controller 40 is configured to, after the refrigerator enters the self-learning detection mode, perform refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment; perform defrosting detection on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment; determine whether there is an abnormality in the compartment during refrigeration based on the temperature of the sensor before and after refrigeration and the refrigeration time; determine whether there is an abnormality in the compartment during defrosting based on the temperature of the sensor before and after defrosting and the defrosting time; if there is an abnormality in the compartment during refrigeration or during defrosting, determine whether the sensor is installed reversely through a self-correction algorithm; if the sensor is installed reversely, perform self-correction and re-enter the self-learning detection mode; if the sensor is not installed reversely, feedback abnormal information.

[0067] Specifically, a refrigerator provided in an embodiment of the present invention includes a housing 10, a refrigeration system 20, a sensor 30 and a controller 40. Figure 2 , Figure 2 It is a structural schematic diagram of a refrigerator body provided by an embodiment of the present invention. The refrigerator in this embodiment has an approximately rectangular shape, and the refrigerator includes a body 10 that defines a storage space. The body 10 serves as a supporting structure of the refrigerator, and is provided with a chamber inside, wherein the chamber includes a component storage cavity for placing components in the refrigerator, such as a compressor, etc., and also includes a storage space for storing food, etc. The storage space can be divided into a plurality of storage rooms (i.e., compartments), and the storage rooms can be configured as a refrigeration room, a freezing room, and a temperature-changing room (also called a fresh-keeping room) according to different uses. One or more door bodies 200 are provided at the opening of each storage room, for example, Figure 2 The upper storage room is a cold storage room, which is provided with a double-opening door body. The door body 200 includes a door body outer shell 210 located outside the box body 10, a door body inner liner 220 located inside the box body 10, an upper end cover 230, a lower end cover 240, and an insulation layer located between the door body outer shell 210, the door body inner liner 220, the upper end cover 230, and the lower end cover 240; usually, the insulation layer is filled with foam material. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to achieve drawer-like storage.

[0068] The refrigerator performs refrigeration operation through the refrigeration system, providing cold energy to the compartment so as to maintain the compartment at a constant low temperature. Specifically, the refrigeration system of the refrigerator in this embodiment can be a single refrigeration system or a dual refrigeration system. Figure 3 , Figure 3The single refrigeration system of a refrigerator provided in one embodiment of the present invention is a schematic diagram of the structure. The single refrigeration system of the refrigerator described in the embodiment of the present invention comprises a compressor 1, a condenser 2, an anti-condensation tube 3, a drying filter 4, a capillary tube 5, an evaporator 6 and a gas-liquid separator 7, and the working structure of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process.

[0069] See also Figure 4 , Figure 4 : is a structural schematic diagram of a dual refrigeration system of a refrigerator provided by an embodiment of the present invention. The dual refrigeration system of the refrigerator described in the embodiment of the present invention includes a compressor 21 for compressing the refrigerant, a first capillary tube 14a and a second capillary tube 14b for decompressing the refrigerant, a refrigeration evaporator 15a and a freezing evaporator 15b as heat absorption mechanisms, a three-way valve 17 for controlling the refrigerant flow path, a one-way valve 18 for preventing the refrigerant from flowing back, a dryer 19 for removing moisture in the refrigeration cycle, and a refrigerant junction 13 for connecting the refrigerant flow path, which are connected by a pipe 20 to circulate the refrigerant to form a refrigeration cycle. In this process, the fans 12a and 12b respectively provided for each storage room are used to speed up the air flow rate, thereby speeding up the speed at which the refrigeration evaporator and the freezing evaporator absorb heat and improving the refrigeration speed of the storage room. Among them, the three-way valve 17 has a first outflow port 17a and a second outflow port 17b. When the three-way valve 17 is controlled to open the first outflow port 17a, the refrigerant flows sequentially through the first capillary tube 14a, the refrigeration evaporator 15a, the gas-liquid separator 16a, and the refrigerant junction 13, and then returns to the compressor 21. After passing through the first capillary tube 14a, the low-pressure and low-temperature refrigerant flows through the refrigeration evaporator 15a, performs heat exchange with the refrigeration evaporator 15a and the air in the refrigeration chamber 110, and refrigerates the refrigeration chamber 110. Similarly, when the three-way valve 17 is controlled to open the second outflow port 17b, the refrigerant flows sequentially through the second capillary tube 14b, the freezing evaporator 15b, the gas-liquid separator 16b, and the refrigerant junction 13, and then returns to the compressor 21. After passing through the second capillary tube 14b, the low-pressure and low-temperature refrigerant flows through the freezing evaporator 15b, performs heat exchange with the freezing evaporator 15b and the air in the freezing chamber 120, and refrigerates the freezing chamber 120.

[0070] When the compartments of the refrigerator are configured as a freezer, a variable temperature chamber and a refrigerated chamber, the sensors in the refrigerator include a freezing temperature sensor, a freezing evaporation sensor, a variable temperature temperature sensor, a variable temperature evaporation sensor, a refrigerated temperature sensor, a refrigerated evaporation sensor and an ambient temperature sensor. The following table defines the symbols of each sensor. The AD channel in the table is the temperature acquisition channel of the sensor.

[0071] name symbol abbreviation AD channel number Refrigeration temperature sensor F-SNR f CF-SNR Frozen evaporation sensor HS-F-SNR hf C-HS-F-SNR Variable Temperature Sensor V-SNR v CV-SNR Variable temperature evaporation sensor HS-V-SNR hv C-HS-V-SNR Refrigeration temperature sensor R-SNR r CR-SNR Refrigeration evaporation sensor HS-R-SNR hr C-HS-R-SNR Ambient temperature sensor E-SNR e CE-SNR

[0072] See also Figure 5 , Figure 51 is a flow chart of a controller in a refrigerator provided by an embodiment of the present invention before entering a self-learning detection mode. As one of the optional embodiments, before the refrigerator enters the self-learning detection mode, the controller is further configured as follows:

[0073] After the refrigerator is powered on, detecting the operating state of the sensor to determine whether the sensor is faulty;

[0074] Detecting the operating status of the fan to determine whether the fan has a fault;

[0075] Acquire the temperatures of the temperature sensor, the evaporation sensor, and the ambient temperature sensor, and determine whether a first temperature difference between the ambient temperature sensor and the temperature sensor and a second temperature difference between the ambient temperature sensor and the evaporation sensor are both less than a preset temperature difference value;

[0076] Obtaining the number of times the self-learning detection mode is entered, and determining whether the number is less than a preset number;

[0077] When the sensor is not faulty, the fan is not faulty, the first temperature difference and the second temperature difference are both smaller than the preset temperature difference value, and the number of times is smaller than the preset number of times, the refrigerator enters the self-learning detection mode.

[0078] Specifically, the embodiment of the present invention defines an array ChannelAd and writes it to a specific location in the memory to store the temperature acquisition channel number of the sensor, array ChannelAd = {CF-SNR, C-HS-F-SNR, CV-SNR, C-HS-V-SNR, CR-SNR, C-HS-R-SNR, CE-SNR}. Exemplarily, the following table shows the acquisition channels corresponding to each sensor.

[0079]

[0080] The embodiment of the present invention sets the conditions for entering the self-learning detection mode, which specifically include: after the refrigerator is powered on, scanning and collecting the voltage value of each sensor for multiple times, converting the voltage value into a temperature value through an analog-to-digital conversion circuit, so as to detect whether each sensor has a fault. If any sensor is detected to have a fault, the self-learning detection mode cannot be entered; controlling each fan to work for 10 seconds in turn, obtaining the operating frequency fed back by each fan, and judging whether the operating frequency of the fan is between 20Hz and 150Hz; if the operating frequency of the fan is between 20Hz and 150Hz, the fan is not faulty; if the operating frequency of the fan is not between 20Hz and 150Hz, the fan is not faulty; Hz to 150Hz, the fan is faulty and cannot enter the self-learning detection mode; obtain the temperature of each temperature sensor, each evaporation sensor and ambient temperature sensor, and determine whether the temperature difference between each temperature sensor and the ambient temperature sensor and the temperature difference between each evaporation sensor and the ambient temperature sensor is less than 3°C. If so, it means that the refrigerator is a hot box at this time, which meets the conditions for entering the self-learning detection mode; if the temperature difference is not less than 3°C, it cannot enter the self-learning detection mode; obtain the number of times the self-learning detection mode is entered, if the number of times the self-learning detection mode is entered is less than the preset number of times, enter the self-learning detection mode; preferably, the preset number of times is twice. Therefore, the conditions for entering the self-learning detection mode are: the sensor is not faulty, the fan is not faulty, the temperature difference between each sensor and the ambient temperature sensor is less than 3°C, and the number of times the self-learning detection mode is entered is less than the preset number of times.

[0081] It should be noted that the number of times the self-learning detection mode is entered is increased by 1 each time the refrigerator enters the self-learning detection mode, and is memorized in a specific location in the memory. The self-learning detection mode is used for refrigerator production detection or user refrigerator maintenance detection. By setting a preset number of times, for example, when the preset number of times is two, the refrigerator will only enter the self-learning detection mode during production detection. When the user purchases a refrigerator that has completed the detection, it will no longer enter the self-learning detection mode after the refrigerator is powered on, which can prevent the user from mistakenly entering the self-learning detection mode, realizing automatic detection of the refrigerator while also ensuring the user's experience. In particular, when multiple detections are required, the number of detections is cleared by preset means. Exemplary, the preset means is to quickly open and close the door 5 times. By setting a preset means for clearing the number of detections, the refrigerator can enter the self-learning detection mode for automatic detection multiple times when it needs maintenance and detection.

[0082] As one of the optional embodiments, performing refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment specifically includes:

[0083] The compartment starts to cool, and when it is detected that the temperature of the temperature sensor drops by a first preset temperature and the temperature of the evaporation sensor is lower than a second preset temperature, the compartment stops cooling;

[0084] The first temperature of the temperature sensor before starting refrigeration, the second temperature of the temperature sensor when stopping refrigeration, the first evaporation temperature of the evaporation sensor before starting refrigeration, the second evaporation temperature of the evaporation sensor when stopping refrigeration, and the refrigeration time of the compartment are collected.

[0085] As one of the optional embodiments, performing defrost detection on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrost time of the compartment specifically includes:

[0086] The compartment starts to defrost, and when it is detected that the temperature of the evaporation sensor is not less than a fourth preset temperature, the compartment stops defrosting;

[0087] The third temperature of the temperature sensor before starting defrosting, the fourth temperature of the temperature sensor when stopping defrosting, the third evaporation temperature of the evaporation sensor before starting defrosting, the fourth evaporation temperature of the evaporation sensor when stopping defrosting and the defrosting time of the compartment are collected.

[0088] Specifically, when there is only one detected compartment, after entering the self-learning detection mode, the detection steps are divided into 0-2 stages: Stage 0: Collect the initial temperature of each sensor; Stage 1: The detected compartment starts to refrigerate, when the temperature of the temperature sensor drops by the first preset temperature, and the temperature of the evaporation sensor is lower than the second preset temperature, the compartment stops refrigerating, and the refrigeration time and the temperature of each sensor are recorded; preferably, the first preset temperature is 5°C, and the second preset temperature is 0°C; Stage 2: The detected compartment starts to defrost, when the temperature of the evaporation sensor is not less than the fourth preset temperature, the compartment stops defrosting, and the defrosting time and the temperature of each sensor are recorded; preferably, the fourth preset temperature is 5°C;

[0089] Specifically, when there are multiple detected compartments, for example, when the refrigerator compartments include a freezer, a temperature-changing room, and a refrigerated room, after entering the self-learning detection mode, the detection steps are divided into 0-6 stages, and each step is performed in sequence. The following table shows the temperature of the refrigerator sensor at each stage, and the temperature before each stage is the temperature of the previous stage, where Txy represents the temperature T of sensor x at stage y.

[0090] stage F-SNR HS-F-SNR V-SNR HS-V-SNR R-SNR HS-R-SNR 0 Tf Tf Tv0 Thv0 Tr0 Thr0 1 Tf1 Thf1 Tv1 Thv1 Tr1 Thr1 2 Tf2 Tf2 Tv2 Thv2 Tr2 Thr2 3 Tf3 Tf3 Tv3 Thv3 Tr3 Thr3 4 Tf4 Tf4 Tv4 Thv4 Tr4 Thr4 5 Tf5 Tf5 Tv5 Thv5 Tr5 Thr5 6 Tf6 Tf6 Tv6 Thv6 Tr6 Thr6

[0091] After setting the preferred preset temperature, the detection steps specifically include:

[0092] Phase 0: Collect the initial temperature of each sensor;

[0093] Stage 1: The freezer compartment starts to refrigerate. When Tf1 = Tf0-5°C and Thf1 < 0°C, the freezer compartment stops refrigerating. The refrigeration time and the temperature of each sensor are recorded.

[0094] Stage 2: The freezer compartment starts to defrost. When Thf2≥5℃, the freezer compartment stops defrosting. The defrosting time and the temperature of each sensor are recorded.

[0095] Stage 3: The variable temperature room starts to cool. When Tv3 = Tv2-5℃ and Thv3 < 0℃, the variable temperature room stops cooling. The cooling time and the temperature of each sensor are recorded.

[0096] Stage 4: The variable temperature compartment starts to defrost. When Thf4≥5℃, the variable temperature compartment stops defrosting. The defrosting time and the temperature of each sensor are recorded.

[0097] Stage 5: The cold storage room starts to refrigerate. When Tr5 = Tr4-5℃ and Thr5 < 0℃, the cold storage room stops refrigerating. The refrigeration time and the temperature of each sensor are recorded.

[0098] Stage 6: The refrigerated compartment starts to defrost. When Thr6≥5℃, the refrigerated compartment stops defrosting. The defrosting time and the temperature of each sensor are recorded.

[0099] See also Figure 6 , Figure 6 The present invention provides a flow chart of a refrigeration detection process of a compartment in a refrigerator according to an embodiment of the present invention. As one of the optional embodiments, judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time specifically includes:

[0100] Calculating a first cooling temperature difference of the temperature sensor before and after cooling according to the first temperature and the second temperature;

[0101] calculating a second refrigeration temperature difference of the evaporation sensor before and after refrigeration according to the first evaporation temperature and the second evaporation temperature;

[0102] Determine whether the refrigeration time is less than a preset refrigeration time, and within the preset refrigeration time, whether the second refrigeration temperature difference is greater than the first refrigeration temperature difference, and whether the first refrigeration temperature difference is greater than a third preset temperature;

[0103] If the cooling time is not less than the preset cooling time, or, within the preset cooling time, the second cooling temperature difference is not greater than the first cooling temperature difference, or, the first cooling temperature difference is not greater than the third preset temperature, it is determined that there is an abnormality in the cooling of the compartment.

[0104] The first refrigeration temperature difference is the absolute value of the temperature difference of the temperature sensor of the compartment before and after refrigeration, and the second refrigeration temperature difference is the absolute value of the temperature difference of the evaporation sensor of the compartment before and after refrigeration.

[0105] Specifically, in the self-learning detection mode of the embodiment of the present invention, an expert system method is used to establish a knowledge base, and the knowledge base stores the judgment conditions for judging whether there is an abnormal state in each detection stage. When there is only one detected compartment, the knowledge base includes the judgment conditions of the refrigeration stage and the defrosting stage. Among them, the judgment conditions of the detected compartment in the refrigeration detection stage include: judging whether the refrigeration time is less than the preset refrigeration time. If the refrigeration time exceeds the preset refrigeration time, it is considered that the refrigeration speed of the compartment is slow and there is an abnormality; judging whether the temperature change of the sensor within the preset refrigeration time meets the temperature change of the evaporation sensor> the temperature change of the temperature sensor> the third preset temperature. If it meets the requirements, it is considered that the refrigeration of the compartment is normal. If it does not meet the requirements, it is considered that the refrigeration-related load of the compartment is abnormal. Preferably, the third preset temperature is 5°C.

[0106] See also Figure 7 , Figure 7 The present invention provides a flowchart of a refrigerator for detecting refrigeration of multiple compartments. As an optional embodiment, judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time, further includes:

[0107] If there are multiple detected compartments, calculate the first refrigeration temperature difference of the temperature sensor of each compartment before and after refrigeration, and the second refrigeration temperature difference of the evaporation sensor of each compartment before and after refrigeration;

[0108] Determine whether the refrigeration time is less than the preset refrigeration time; within the preset refrigeration time, whether the second refrigeration temperature difference of the current detection compartment is greater than the first refrigeration temperature difference, whether the first refrigeration temperature difference is greater than the third preset temperature, and whether the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are both less than the third preset temperature;

[0109] If the refrigeration time is not less than the preset refrigeration time, or, within the preset refrigeration time, the second refrigeration temperature difference of the current detection compartment is not greater than the first refrigeration temperature difference, or, the first refrigeration temperature difference is not greater than the third preset temperature, or, the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are not less than the third preset temperature, it is determined that there is an abnormality in the refrigeration of the compartment.

[0110] Specifically, when the detected compartments are a freezer, a temperature-changing room, and a refrigerator, after the refrigeration stage of each compartment is completed, the temperature changes of each sensor of the refrigerator are shown in the following table:

[0111] stage F-SNR HS-F-SNR V-SNR HS-V-SNR R-SNR HS-R-SNR 1 ΔTf1=|Tf1-Tf0| ΔThf1=|Thf1-Thf0| ΔTv1=|Tv1-Tv0| ΔThv1=|Thv1-Thv0| ΔTr1=|Tr1-Tr0| ΔThr1=|Thr1-Thr0| 3 ΔTf3=|Tf3-Tf2| ΔThf3=|Thf3-Thf2| ΔTv3=|Tv3-Tv2| ΔThv3=|Thv3-Thv2| ΔTr3=|Tr3-Tr2| ΔThr3=|Thr3-Thr2| 5 ΔTf5=|Tf5-Tf4| ΔThf5=|Thf5-Thf4| ΔTv5=|Tv5-Tv4| ΔThv5=|Thv5-Thv4| ΔTr5=|Tr5-Tr4| ΔThr5=|Thr5-Thr4|

[0112] Preferably, when the preset temperature is 5° C. and the preset cooling time is N minutes, the judgment conditions for the cooling stage of each compartment in the knowledge base are:

[0113] Stage 1: If the refrigeration time of the freezer compartment exceeds N minutes, it is considered that the refrigeration speed of the freezer compartment is slow and there is an abnormality; within N minutes after the freezer compartment starts to refrigerate, if ΔThf1>ΔTf1>5℃>(ΔTv1, ΔThv1, ΔTr1, ΔThr1) is satisfied, the refrigeration of the freezer compartment is considered normal; if not satisfied, it is considered that there is an abnormality in the refrigeration-related load of the freezer compartment, the abnormal state is recorded and the abnormal information is fed back after the detection is completed.

[0114] Stage 3: If the cooling time of the variable temperature room exceeds N minutes, it is considered that the cooling speed of the variable temperature room is slow and there is an abnormality; within N minutes after the variable temperature room starts to cool, if ΔThv3>ΔTv3>5℃>(ΔTf3, ΔThf3, ΔTr3, ΔThr3) is satisfied, it is considered that the cooling of the variable temperature room is normal; if not satisfied, it is considered that there is an abnormality in the cooling-related load of the variable temperature room, the abnormal state is recorded and the abnormal information is fed back after the detection is completed.

[0115] Stage 5: If the refrigeration time of the cold storage room exceeds N minutes, it is considered that the refrigeration speed of the cold storage room is slow and there is an abnormality; within N minutes after the cold storage room starts to refrigerate, if ΔThr5>ΔTr5>5℃>(ΔTf5, ΔThf5, ΔTv5, ΔThv5) is satisfied, it is considered that the refrigeration of the cold storage room is normal; if not, it is considered that there is an abnormality in the refrigeration-related load of the cold storage room, and the abnormal state is recorded and the abnormal information is fed back after the detection is completed.

[0116] See also Figure 8 , Figure 8 The present invention provides a flow chart of a defrosting detection process for a compartment in a refrigerator provided by an embodiment of the present invention. As one of the optional embodiments, judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time specifically includes:

[0117] calculating a first defrosting temperature difference of the temperature sensor before and after defrosting according to the third temperature and the fourth temperature;

[0118] calculating a second defrosting temperature difference of the evaporation sensor before and after defrosting according to the third evaporation temperature and the fourth evaporation temperature;

[0119] Determine whether the defrost time is less than a preset defrost time, and within the preset defrost time, whether the second defrost temperature difference is not less than a fifth preset temperature, and whether the second defrost temperature difference is greater than the first defrost temperature difference;

[0120] If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, it is determined that there is an abnormality in the defrosting of the compartment.

[0121] The first defrost temperature difference is the absolute value of the temperature difference of the temperature sensor of the compartment before and after defrosting, and the second defrost temperature difference is the absolute value of the temperature difference of the evaporation sensor of the compartment before and after defrosting.

[0122] Specifically, when there is only one detected compartment, the judgment conditions of the detected compartment in the defrost detection stage in the knowledge base include: judging whether the defrost time is less than the preset defrost time. If the defrost time exceeds the preset defrost time, it is considered that the defrost speed of the compartment is slow and abnormal; judging whether the temperature change of the sensor meets the requirement that the temperature change of the evaporation sensor is greater than the temperature change of the temperature sensor within the preset defrost time, and the temperature change of the evaporation sensor is not less than the fifth preset temperature. If not, it is considered that the defrost-related load of the compartment is abnormal. Preferably, the fifth preset temperature is 5°C.

[0123] See also Fig. 9 , Fig. 9 The present invention provides a flowchart of a defrosting detection process for multiple compartments in a refrigerator according to an embodiment of the present invention. As one of the optional embodiments, judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time specifically includes:

[0124] If there are multiple detected compartments, calculate the first defrosting temperature difference of the temperature sensor of each compartment before and after defrosting, and the second defrosting temperature difference of the evaporation sensor of each compartment before and after defrosting;

[0125] Determine whether the defrost time is less than the preset defrost time; within the preset defrost time, whether the second defrost temperature difference of the current detection chamber is not less than the fifth preset temperature, whether the second defrost temperature difference is greater than the first defrost temperature difference, and whether the first defrost temperature difference and the second defrost temperature difference of other chambers are both less than the second defrost temperature difference of the current detection chamber;

[0126] If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference of the current detection chamber is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, or, the first defrost temperature difference and the second defrost temperature difference of other chambers are not less than the second defrost temperature difference of the current detection chamber, it is determined that there is an abnormality in the defrosting of the chamber.

[0127] Specifically, when the detected compartments are the freezer, the temperature-changing room, and the refrigerator, after the defrosting stage of each compartment is completed, the temperature changes of each sensor of the refrigerator are as shown in the following table:

[0128] stage F-SNR HS-F-SNR V-SNR HS-V-SNR R-SNR HS-R-SNR 2 ΔTf2=|Tf2-Tf1| ΔThf2=|Thf2-Thf1| ΔTv2=|Tv2-Tv1| ΔThv2=|Thv2-Thv1| ΔTr2=|Tr2-Tr1| ΔThr2=|Thr2-Thr1| 4 ΔTf4=|Tf4-Tf3| ΔThf4=|Thf4-Thf3| ΔTv4=|Tv4-Tv3| ΔThv4=|Thv4-Thv3| ΔTr4=|Tr4-Tr3| ΔThr4=|Thr4-Thr3| 6 ΔTf6=|Tf6-Tf5| ΔThf6=|Thf6-Thf5| ΔTv6=|Tv6-Tv5| ΔThv6=|Thv6-Thv5| ΔTr6=|Tr6-Tr5| ΔThr6=|Thr6-Thr5|

[0129] Preferably, when the preset temperature is 5°C and the preset defrosting time is M minutes, the judgment conditions for the defrosting stage of each compartment in the knowledge base are:

[0130] Stage 2: If the defrosting time of the freezer compartment exceeds M minutes, it is considered that the defrosting speed of the freezer compartment is slow and abnormal; within M minutes after the freezer compartment starts to defrost, if ΔThf2>(ΔTf2, ΔTv2, ΔThv2, ΔTr2, ΔThr2) and Thf2≥5°C, it is considered that the defrosting of the freezer compartment is normal; if not, it is considered that the defrosting-related load of the freezer compartment is abnormal.

[0131] Stage 4: If the defrosting time of the variable temperature compartment exceeds M minutes, it is considered that the defrosting speed of the variable temperature compartment is slow and there is an abnormality; within M minutes after the variable temperature compartment starts to defrost, if ΔThv4>(ΔTv4, ΔTf4, ΔThf4, ΔTr4, ΔThr4) and Thv4≥5°C, it is considered that the defrosting of the variable temperature compartment is normal; if not, it is considered that there is an abnormality in the defrosting-related load of the variable temperature compartment.

[0132] Stage 6: If the defrosting time of the refrigerated compartment exceeds M minutes, it is considered that the defrosting speed of the refrigerated compartment is slow and abnormal; within M minutes after the refrigerated compartment starts to defrost, if ΔThr6>(ΔTr6, ΔTv6, ΔThv6, ΔTf6, ΔThf6) and Thr6≥5°C, it is considered that the defrosting of the refrigerated compartment is normal; if not, it is considered that the defrosting-related load of the refrigerated compartment is abnormal.

[0133] As one of the optional embodiments, the refrigerator further includes, during the self-learning detection process:

[0134] Define a test result statistic value for recording the results of the refrigeration detection and defrost detection of each compartment; wherein the initial value of the test result statistic value is zero; when each compartment performs refrigeration detection or defrost detection, if there is no abnormality in the refrigeration or defrost of the compartment, the test result statistic value is increased by 1; obtain the number of detection steps; wherein the refrigeration detection or defrost detection of each compartment is one detection step; when all compartments complete the refrigeration detection and defrost detection, determine whether the test result statistic value is equal to the number of detection steps; if the test result statistic value is equal to the number of detection steps, determine that the refrigerator performance detection is normal, and feedback the normal detection information; if the test result statistic value is less than the number of detection steps, determine that the refrigerator is abnormal, and feedback the abnormal information.

[0135] Specifically, when the detected compartments include a refrigerating compartment, a variable temperature compartment and a freezing compartment, the refrigerator includes 6 stages in the self-learning detection process, and a test result statistic u8CountResultOk is defined to record the results of the refrigeration detection and the defrosting detection of each compartment.

[0136] The initial value of the test result statistic is defined as u8CountResultOk=0; in each stage of detection, if the detection result of this stage is normal, the test result statistic is u8CountResultOk+1; if the detection result of this stage is abnormal, the test result statistic is u8CountResultOk+0; wherein, the maximum value of the test result statistic u8CountResultOk is 6. Since there are 6 stages in the detection, the number of detection steps is 6; after the detection of each stage is completed, if u8CountResultOk=6, it is determined that the refrigerator performance detection is normal, and the normal detection information is fed back; if u8CountResultOk<6, it is determined that the refrigerator is abnormal, and the abnormal information is fed back.

[0137] As one of the optional embodiments, the self-correction algorithm specifically includes:

[0138] Obtaining the temperature difference of the sensors of all compartments before and after refrigeration and before and after defrosting;

[0139] A first sensor combination is obtained according to the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments, the sensor corresponding to the second largest temperature difference, and the sensor corresponding to the largest temperature difference in the defrosting detection of each of the compartments;

[0140] If the first sensor in the first sensor combination is the second sensor in the second sensor combination, and the second sensor in the first sensor combination is the first sensor in the second sensor combination, it is determined that the sensors are installed reversely, and the sensors installed reversely are the first sensor and the second sensor; wherein, in the second sensor combination, the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments is the evaporation sensor of the current detection compartment, the sensor corresponding to the second largest temperature difference is the temperature sensor of the current detection compartment, and the sensor corresponding to the largest temperature difference in the defrost detection of each of the compartments is the evaporation sensor of the current detection compartment.

[0141] Specifically, when the detected compartments include a freezer, a temperature-changing room, and a refrigerated room, the self-correction algorithm determines whether there is an abnormality in the acquisition channel of each sensor according to the order of the temperature changes of each sensor in each stage in the knowledge base. The order of the sensor temperature changes in the six stages in the knowledge base is as follows:

[0142] Stage 1: ΔThf1 is the largest among ΔTf1, ΔThf1, ΔTv1, ΔThv1, ΔTr1, and ΔThr1, followed by ΔTf1, that is, the largest temperature change in the freezing compartment during the refrigeration stage is in the freezing evaporation sensor, followed by the freezing temperature sensor;

[0143] Stage 2: The largest of ΔTf2, ΔThf2, ΔTv2, ΔThv2, ΔTr2, and ΔThr2 is ΔThf2, that is, the refrigeration evaporation sensor has the largest temperature change during the defrosting stage of the freezing compartment;

[0144] Stage 3: The largest of ΔTf3, ΔThf3, ΔTv3, ΔThv3, ΔTr3, and ΔThr3 is ΔThv3, followed by ΔTv3, that is, the variable temperature evaporation sensor has the largest temperature change in the cooling stage of the variable temperature compartment, followed by the variable temperature sensor;

[0145] Stage 4: The largest of ΔTf4, ΔThf4, ΔTv4, ΔThv4, ΔTr4, and ΔThr4 is ΔThv4, that is, the variable temperature evaporation sensor has the largest temperature change during the defrosting stage of the variable temperature compartment;

[0146] Stage 5: ΔThr5 is the largest among ΔTf5, ΔThf5, ΔTv5, ΔThv5, ΔTr5, and ΔThr5, followed by ΔTr5, that is, the refrigeration evaporation sensor has the largest temperature change in the refrigeration stage of the refrigerated compartment, followed by the refrigeration temperature sensor;

[0147] Stage 6: The largest of ΔTf6, ΔThf6, ΔTv6, ΔThv6, ΔTr6, and ΔThr6 is ΔThr6, that is, the refrigeration evaporation sensor has the largest temperature change during the defrosting stage of the refrigeration compartment.

[0148] The temperature change ranking of each sensor obtained in the actual detection is compared with that in the knowledge base. When the first sensor is in the actual detection but should be the second sensor according to the knowledge base, and the second sensor is in the actual detection but should be the first sensor according to the knowledge base, it is determined that the first sensor and the second sensor are installed reversely.

[0149] Exemplarily, if in actual detection the following conditions are satisfied at the same time: in stage 1, the maximum value of ΔTf1, ΔThf1, ΔTv1, ΔThv1, ΔTr1, and ΔThr1 is ΔThr1, not ΔThf1; in stage 2, the maximum value of ΔThf2, ΔTf2, ΔTv2, ΔThv2, ΔTr2, and ΔThr2 is ΔThr2, not ΔThf2; in stage 5, the maximum value of ΔTf5, ΔThf5, ΔTv5, ΔThv5, ΔTr5, and ΔThr5 is ΔThf5, not ΔThr5; in stage 6, the maximum value of ΔThf6, ΔTf6, ΔTv6, ΔThv6, ΔTr6, and ΔThr6 is ΔThf6, not ΔThr6; then it is considered that the acquisition channels of the freezing evaporation sensor and the refrigeration evaporation sensor are installed reversely.

[0150] As one of the optional embodiments, if the sensor is installed upside down, self-calibration is performed and then the self-learning detection mode is re-entered, which specifically includes:

[0151] Acquire the sensor installed upside down obtained by the self-calibration algorithm, and the acquisition channel corresponding to the sensor installed upside down; swap and change the acquisition channel of the sensor installed upside down; write the acquisition channel corresponding to the changed sensor into the memory to complete the self-calibration; after completing the self-calibration, re-enter the self-learning detection mode for detection.

[0152] Exemplarily, if the self-calibration algorithm determines that the refrigeration evaporation sensor and the freezing evaporation sensor are installed reversely, the steps of performing self-calibration include:

[0153] Get the sensor acquisition channel before calibration:

[0154]

[0155] Swap the acquisition channel 0x02 of the frozen evaporation sensor with the acquisition channel 0x07 of the refrigerated evaporation sensor, and write them into a specific memory to obtain the acquisition channel corresponding to the calibrated sensor:

[0156]

[0157] After the self-calibration is completed, the temperature change of each sensor in stages 1-6 is re-judged based on the statistical data to see whether it can meet the conditions of each stage in the knowledge base. If it does, it is considered that the refrigerator is operating normally after calibration. If it still cannot meet the conditions, abnormal information is fed back. Among them, the abnormal information is used by the inspector to conduct targeted maintenance of the refrigerator based on the abnormal information.

[0158] As one of the optional embodiments, the refrigerator also includes a display screen, which is arranged on the box body and connected to the controller through a serial communication method, and is used to display information; wherein the information includes the detection results and the feedback abnormal information, which is used to prompt the inspector or maintenance personnel.

[0159] Specifically, when the self-learning detection mode of the refrigerator ends, if the detection is completed and there is no abnormality in each stage, the display screen displays the detection completion flag, indicating that the refrigerator self-detection is completed; if there is an abnormality in the detection of each stage, the display screen displays the abnormal information of the stage where the abnormality occurs. For example, when the detection of stage 1 is abnormal, the display screen displays C1, indicating that there is an abnormality in the refrigeration of the freezer compartment.

[0160] In the prior art, the inspection process of refrigerators usually requires workers to install a large number of sensor probes, the procedures are many and complicated, the construction cost of the inspection line and the personnel cost are high, and the inspection judgment requires the inspector to judge by experience, which is prone to misjudgment and missed judgment, and the accuracy is low. When there is a problem with the refrigerator, it can only be repaired on the repair line, and some problems cannot be solved by self-repair. This embodiment uses the self-learning detection mode to autonomously identify whether the load of each compartment of the refrigerator is normal, realizes the automatic detection of the refrigerator, saves labor, and improves the accuracy and efficiency of detection; the self-correction algorithm automatically repairs the problem of reverse installation of the sensor, reduces the maintenance cost, and improves the efficiency of refrigerator maintenance; by memorizing the number of times entering the self-learning detection mode, the automatic detection mode of the refrigerator is only used during production detection or user refrigerator maintenance detection, avoiding the user from mistakenly entering the self-learning detection mode when using the refrigerator, and ensuring the user experience; by displaying the detection results containing abnormal information on the display screen, the inspector can repair the refrigerator in a targeted manner according to the abnormal information. The embodiment of the present invention realizes the automatic detection of the refrigerator, reduces the manual operation steps, saves labor, reduces the maintenance cost, and at the same time improves the detection accuracy and efficiency, and ensures the user experience.

[0161] See also Fig.10 , Fig.10: is a flowchart of a self-learning detection method for a refrigerator provided in an embodiment of the present invention. The self-learning detection method for a refrigerator provided in an embodiment of the present invention is applied to a refrigerator including a box, a refrigeration system and a sensor, wherein the box is provided with a plurality of compartments, the refrigeration system includes a compressor, an evaporator, a condenser, a fan and an expansion valve, the sensor is provided in each of the compartments, including a temperature sensor and an evaporation sensor, the temperature sensor is used to detect the temperature of the compartment, the evaporation sensor is used to detect the temperature of the evaporator of the compartment, and the self-learning detection method includes:

[0162] S1: After the refrigerator enters the self-learning detection mode, a refrigeration detection is performed on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment;

[0163] S2: Performing defrosting detection on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment;

[0164] S3: judging whether there is an abnormality in the cooling of the compartment according to the temperature of the sensor before and after cooling and the cooling time;

[0165] S4: judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time;

[0166] S5: If there is an abnormality in the compartment during refrigeration or defrosting, it is determined through a self-correction algorithm whether the sensor is installed reversely; if the sensor is installed reversely, self-correction is performed and the self-learning detection mode is re-entered; if the sensor is not installed reversely, abnormal information is fed back.

[0167] As one of the optional embodiments, in the self-learning detection method, before the refrigerator enters the self-learning detection mode, the controller is further configured to:

[0168] After the refrigerator is powered on, the operating state of the sensor is detected to determine whether the sensor is faulty; the operating state of the fan is detected to determine whether the fan is faulty;

[0169] Acquire the temperatures of the temperature sensor, the evaporation sensor, and the ambient temperature sensor, and determine whether a first temperature difference between the ambient temperature sensor and the temperature sensor and a second temperature difference between the ambient temperature sensor and the evaporation sensor are both less than a preset temperature difference value;

[0170] Obtaining the number of times the self-learning detection mode is entered, and determining whether the number is less than a preset number;

[0171] When the sensor is not faulty, the fan is not faulty, the first temperature difference and the second temperature difference are both smaller than the preset temperature difference value, and the number of times is smaller than the preset number of times, the refrigerator enters the self-learning detection mode.

[0172] As one of the optional embodiments, in the self-learning detection method, performing refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment specifically includes:

[0173] The compartment starts to cool, and when it is detected that the temperature of the temperature sensor drops by a first preset temperature and the temperature of the evaporation sensor is lower than a second preset temperature, the compartment stops cooling;

[0174] The first temperature of the temperature sensor before starting refrigeration, the second temperature of the temperature sensor when stopping refrigeration, the first evaporation temperature of the evaporation sensor before starting refrigeration, the second evaporation temperature of the evaporation sensor when stopping refrigeration, and the refrigeration time of the compartment are collected.

[0175] As one of the optional embodiments, in the self-learning detection method, judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time specifically includes:

[0176] Calculating a first cooling temperature difference of the temperature sensor before and after cooling according to the first temperature and the second temperature;

[0177] calculating a second refrigeration temperature difference of the evaporation sensor before and after refrigeration according to the first evaporation temperature and the second evaporation temperature;

[0178] Determine whether the refrigeration time is less than a preset refrigeration time, and within the preset refrigeration time, whether the second refrigeration temperature difference is greater than the first refrigeration temperature difference, and whether the first refrigeration temperature difference is greater than a third preset temperature;

[0179] If the cooling time is not less than the preset cooling time, or, within the preset cooling time, the second cooling temperature difference is not greater than the first cooling temperature difference, or, the first cooling temperature difference is not greater than the third preset temperature, it is determined that there is an abnormality in the cooling of the compartment.

[0180] As one of the optional embodiments, in the self-learning detection method, judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time, further includes:

[0181] If there are multiple detected compartments, calculate the first refrigeration temperature difference of the temperature sensor of each compartment before and after refrigeration, and the second refrigeration temperature difference of the evaporation sensor of each compartment before and after refrigeration;

[0182] Determine whether the refrigeration time is less than the preset refrigeration time; within the preset refrigeration time, whether the second refrigeration temperature difference of the current detection compartment is greater than the first refrigeration temperature difference, whether the first refrigeration temperature difference is greater than the third preset temperature, and whether the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are both less than the third preset temperature;

[0183] If the refrigeration time is not less than the preset refrigeration time, or, within the preset refrigeration time, the second refrigeration temperature difference of the current detection compartment is not greater than the first refrigeration temperature difference, or, the first refrigeration temperature difference is not greater than the third preset temperature, or, the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are not less than the third preset temperature, it is determined that there is an abnormality in the refrigeration of the compartment.

[0184] As one of the optional embodiments, in the self-learning detection method, performing defrost detection on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrost time of the compartment specifically includes:

[0185] The compartment starts to defrost, and when it is detected that the temperature of the evaporation sensor is not less than a fourth preset temperature, the compartment stops defrosting;

[0186] The third temperature of the temperature sensor before starting defrosting, the fourth temperature of the temperature sensor when stopping defrosting, the third evaporation temperature of the evaporation sensor before starting defrosting, the fourth evaporation temperature of the evaporation sensor when stopping defrosting and the defrosting time of the compartment are collected.

[0187] As one of the optional embodiments, in the self-learning detection method, judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time specifically includes:

[0188] calculating a first defrosting temperature difference of the temperature sensor before and after defrosting according to the third temperature and the fourth temperature;

[0189] calculating a second defrosting temperature difference of the evaporation sensor before and after defrosting according to the third evaporation temperature and the fourth evaporation temperature;

[0190] Determine whether the defrost time is less than a preset defrost time, and within the preset defrost time, whether the second defrost temperature difference is not less than a fifth preset temperature, and whether the second defrost temperature difference is greater than the first defrost temperature difference;

[0191] If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, it is determined that there is an abnormality in the defrosting of the compartment.

[0192] As one of the optional embodiments, in the self-learning detection method, judging whether there is an abnormality in the compartment during defrosting according to the temperature of the sensor before and after defrosting and the defrosting time specifically includes:

[0193] If there are multiple detected compartments, calculate the first defrosting temperature difference of the temperature sensor of each compartment before and after defrosting, and the second defrosting temperature difference of the evaporation sensor of each compartment before and after defrosting;

[0194] Determine whether the defrost time is less than the preset defrost time; within the preset defrost time, whether the second defrost temperature difference of the current detection chamber is not less than the fifth preset temperature, whether the second defrost temperature difference is greater than the first defrost temperature difference, and whether the first defrost temperature difference and the second defrost temperature difference of other chambers are both less than the second defrost temperature difference of the current detection chamber;

[0195] If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference of the current detection chamber is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, or, the first defrost temperature difference and the second defrost temperature difference of other chambers are not less than the second defrost temperature difference of the current detection chamber, it is determined that there is an abnormality in the defrosting of the chamber.

[0196] As one of the optional embodiments, in the self-learning detection method, the self-correction algorithm specifically includes:

[0197] Obtaining the temperature difference of the sensors of all compartments before and after refrigeration and before and after defrosting;

[0198] A first sensor combination is obtained according to the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments, the sensor corresponding to the second largest temperature difference, and the sensor corresponding to the largest temperature difference in the defrosting detection of each of the compartments;

[0199] If the first sensor in the first sensor combination is the second sensor in the second sensor combination, and the second sensor in the first sensor combination is the first sensor in the second sensor combination, it is determined that the sensors are installed reversely, and the sensors installed reversely are the first sensor and the second sensor; wherein, in the second sensor combination, the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments is the evaporation sensor of the current detection compartment, the sensor corresponding to the second largest temperature difference is the temperature sensor of the current detection compartment, and the sensor corresponding to the largest temperature difference in the defrost detection of each of the compartments is the evaporation sensor of the current detection compartment.

[0200] Compared with the prior art, the beneficial effects of a refrigerator self-learning detection method provided by an embodiment of the present invention are: through the self-learning detection mode, it can autonomously identify whether the load of each compartment of the refrigerator is normal, realize the automatic detection of the refrigerator, save labor, and improve the detection accuracy and detection efficiency; through the self-correction algorithm, the problem of sensor installation is automatically repaired, which reduces the maintenance cost and improves the efficiency of refrigerator maintenance; by memorizing the number of times the self-learning detection mode is entered, the automatic detection mode of the refrigerator is only used during production inspection or user refrigerator maintenance inspection, avoiding the user from mistakenly entering the self-learning detection mode when using the refrigerator, and ensuring the user experience. The embodiment of the present invention realizes the automatic detection of the refrigerator, reduces the manual operation steps, saves labor, reduces the maintenance cost, and at the same time improves the detection accuracy and detection efficiency, ensuring the user experience.

[0201] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. 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 box body, which serves as the supporting structure of the refrigerator, has several compartments inside; A refrigeration system, which is arranged in the box, includes a compressor, an evaporator, a condenser, a fan and an expansion valve; A sensor is arranged in each of the compartments, and the sensor includes a temperature sensor and an evaporation sensor; the temperature sensor is used to detect the temperature of the compartment; the evaporation sensor is used to detect the temperature of the evaporator of the compartment; The controller is configured to, after the refrigerator enters the self-learning detection mode, perform refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment; Performing defrosting detection on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment; judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time; According to the temperature of the sensor before and after defrosting and the defrosting time, judging whether there is an abnormality in the compartment during defrosting; If there is an abnormality in the compartment during refrigeration or defrosting, a self-correction algorithm is used to determine whether the sensor is installed reversely; if the sensor is installed reversely, self-correction is performed and the self-learning detection mode is re-entered; if the sensor is not installed reversely, abnormal information is fed back.

2. The refrigerator according to claim 1, characterized in that: Before the refrigerator enters the self-learning detection mode, the controller is further configured to: After the refrigerator is powered on, detecting the operating state of the sensor to determine whether the sensor is faulty; Detecting the operating status of the fan to determine whether the fan has a fault; Acquire the temperatures of the temperature sensor, the evaporation sensor, and the ambient temperature sensor, and determine whether a first temperature difference between the ambient temperature sensor and the temperature sensor and a second temperature difference between the ambient temperature sensor and the evaporation sensor are both less than a preset temperature difference value; Obtaining the number of times the self-learning detection mode is entered, and determining whether the number is less than a preset number; When the sensor is not faulty, the fan is not faulty, the first temperature difference and the second temperature difference are both smaller than the preset temperature difference value, and the number of times is smaller than the preset number of times, the refrigerator enters the self-learning detection mode.

3. The refrigerator according to claim 1, characterized in that: The performing refrigeration detection on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment specifically includes: The compartment starts to cool, and when it is detected that the temperature of the temperature sensor drops by a first preset temperature and the temperature of the evaporation sensor is lower than a second preset temperature, the compartment stops cooling; The first temperature of the temperature sensor before starting refrigeration, the second temperature of the temperature sensor when stopping refrigeration, the first evaporation temperature of the evaporation sensor before starting refrigeration, the second evaporation temperature of the evaporation sensor when stopping refrigeration, and the refrigeration time of the compartment are collected.

4. The refrigerator according to claim 3, characterized in that: The determining, based on the temperature of the sensor before and after refrigeration and the refrigeration time, whether there is an abnormality in the refrigeration of the compartment specifically includes: Calculating a first cooling temperature difference of the temperature sensor before and after cooling according to the first temperature and the second temperature; calculating a second refrigeration temperature difference of the evaporation sensor before and after refrigeration according to the first evaporation temperature and the second evaporation temperature; Determine whether the refrigeration time is less than a preset refrigeration time, and within the preset refrigeration time, whether the second refrigeration temperature difference is greater than the first refrigeration temperature difference, and whether the first refrigeration temperature difference is greater than a third preset temperature; If the cooling time is not less than the preset cooling time, or, within the preset cooling time, the second cooling temperature difference is not greater than the first cooling temperature difference, or, the first cooling temperature difference is not greater than the third preset temperature, it is determined that there is an abnormality in the cooling of the compartment.

5. The refrigerator according to claim 4, characterized in that: The step of judging whether there is an abnormality in the refrigeration of the compartment according to the temperature of the sensor before and after refrigeration and the refrigeration time further comprises: If there are multiple detected compartments, calculate the first refrigeration temperature difference of the temperature sensor of each compartment before and after refrigeration, and the second refrigeration temperature difference of the evaporation sensor of each compartment before and after refrigeration; Determine whether the refrigeration time is less than the preset refrigeration time; within the preset refrigeration time, whether the second refrigeration temperature difference of the current detection compartment is greater than the first refrigeration temperature difference, whether the first refrigeration temperature difference is greater than the third preset temperature, and whether the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are both less than the third preset temperature; If the refrigeration time is not less than the preset refrigeration time, or, within the preset refrigeration time, the second refrigeration temperature difference of the current detection compartment is not greater than the first refrigeration temperature difference, or, the first refrigeration temperature difference is not greater than the third preset temperature, or, the first refrigeration temperature difference and the second refrigeration temperature difference of other compartments are not less than the third preset temperature, it is determined that there is an abnormality in the refrigeration of the compartment.

6. The refrigerator according to claim 1, characterized in that: The defrosting detection is performed on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment, specifically including: The compartment starts to defrost, and when it is detected that the temperature of the evaporation sensor is not less than a fourth preset temperature, the compartment stops defrosting; The third temperature of the temperature sensor before starting defrosting, the fourth temperature of the temperature sensor when stopping defrosting, the third evaporation temperature of the evaporation sensor before starting defrosting, the fourth evaporation temperature of the evaporation sensor when stopping defrosting and the defrosting time of the compartment are collected.

7. The refrigerator according to claim 6, characterized in that The determining, based on the temperature of the sensor before and after defrosting and the defrosting time, whether there is an abnormality in the compartment during defrosting specifically includes: calculating a first defrosting temperature difference of the temperature sensor before and after defrosting according to the third temperature and the fourth temperature; calculating a second defrosting temperature difference of the evaporation sensor before and after defrosting according to the third evaporation temperature and the fourth evaporation temperature; Determine whether the defrost time is less than a preset defrost time, and within the preset defrost time, whether the second defrost temperature difference is not less than a fifth preset temperature, and whether the second defrost temperature difference is greater than the first defrost temperature difference; If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, it is determined that there is an abnormality in the defrosting of the compartment.

8. The refrigerator according to claim 7, characterized in that: The determining, based on the temperature of the sensor before and after defrosting and the defrosting time, whether there is an abnormality in the compartment during defrosting specifically includes: If there are multiple detected compartments, calculate the first defrosting temperature difference of the temperature sensor of each compartment before and after defrosting, and the second defrosting temperature difference of the evaporation sensor of each compartment before and after defrosting; Determine whether the defrost time is less than the preset defrost time; within the preset defrost time, whether the second defrost temperature difference of the current detection chamber is not less than the fifth preset temperature, whether the second defrost temperature difference is greater than the first defrost temperature difference, and whether the first defrost temperature difference and the second defrost temperature difference of other chambers are both less than the second defrost temperature difference of the current detection chamber; If the defrost time is not less than the preset defrost time, or, within the preset defrost time, the second defrost temperature difference of the current detection chamber is less than the fifth preset temperature, or, the second defrost temperature difference is not greater than the first defrost temperature difference, or, the first defrost temperature difference and the second defrost temperature difference of other chambers are not less than the second defrost temperature difference of the current detection chamber, it is determined that there is an abnormality in the defrosting of the chamber.

9. The refrigerator according to claim 1, characterized in that: The self-correction algorithm specifically includes: Obtaining the temperature difference of the sensors of all compartments before and after refrigeration and before and after defrosting; A first sensor combination is obtained according to the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments, the sensor corresponding to the second largest temperature difference, and the sensor corresponding to the largest temperature difference in the defrosting detection of each of the compartments; If the first sensor in the first sensor combination is the second sensor in the second sensor combination, and the second sensor in the first sensor combination is the first sensor in the second sensor combination, it is determined that the sensors are installed reversely, and the sensors installed reversely are the first sensor and the second sensor; wherein, in the second sensor combination, the sensor corresponding to the largest temperature difference in the refrigeration detection of each of the compartments is the evaporation sensor of the current detection compartment, the sensor corresponding to the second largest temperature difference is the temperature sensor of the current detection compartment, and the sensor corresponding to the largest temperature difference in the defrost detection of each of the compartments is the evaporation sensor of the current detection compartment.

10. A self-learning detection method for a refrigerator, characterized in that: The self-learning detection method is applied to a refrigerator including a box, a refrigeration system and a sensor, wherein a plurality of compartments are arranged inside the box, the refrigeration system includes a compressor, an evaporator, a condenser, a fan and an expansion valve, the sensor is arranged in each of the compartments, including a temperature sensor and an evaporation sensor, the temperature sensor is used to detect the temperature of the compartment, the evaporation sensor is used to detect the temperature of the evaporator of the compartment, and the self-learning detection method includes: After the refrigerator enters the self-learning detection mode, a refrigeration detection is performed on at least one of the compartments to obtain the temperature of the sensor before and after refrigeration and the refrigeration time of the compartment; a defrosting detection is performed on at least one of the compartments to obtain the temperature of the sensor before and after defrosting and the defrosting time of the compartment; According to the temperature of the sensor before and after refrigeration and the refrigeration time, judging whether there is an abnormality in the compartment during refrigeration; according to the temperature of the sensor before and after defrosting and the defrosting time, judging whether there is an abnormality in the compartment during defrosting; If there is an abnormality in the compartment during refrigeration or defrosting, it is determined through a self-correction algorithm whether the sensor is installed reversely; if the sensor is installed reversely, self-correction is performed and the self-learning detection mode is re-entered; if the sensor is not installed reversely, abnormal information is fed back.

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