Refrigerator, fault detection method and device for peculiar smell sensor of refrigerator and medium

Abstract

The embodiment of the invention belongs to the technical field of household appliances, and provides a refrigerator, a fault detection method and device for a peculiar smell sensor of the refrigerator and a medium, the refrigerator can detect an electric signal of the peculiar smell sensor through a controller, a first change rate is determined, and the first change rate is the change rate of a signal value at the current moment; if the first change rate is below a first preset threshold value, acquiring a plurality of first signal values of an electric signal of the peculiar smell sensor within a preset duration, then determining whether the peculiar smell sensor is abnormal or not according to the plurality of first signal values, and if so, generating alarm information. According to the embodiment of the invention, the electric signal of the odor sensor is changed based on the change of the concentration of the odor gas in the refrigerator, so that the refrigerator can perform self-diagnosis according to the electric signal of the odor sensor, whether the odor sensor is abnormal or not is determined in time, and the intelligent level of the refrigerator is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of household appliances, and more specifically, to a refrigerator, a method, a device and a medium for detecting a fault of an odor sensor of the refrigerator. Background Art

[0002] The food in the refrigerator will gradually deteriorate as the storage time increases. The deteriorated food will not only produce unpleasant and toxic gases, but will also accelerate the deterioration of other foods.

[0003] At present, by embedding an odor sensor (such as a metal oxide sensor) in the refrigerator, the gas (such as volatile organic gas) generated by the food in the refrigerator can be detected. The more serious the food deterioration, the greater the concentration of the volatile organic gas produced. Therefore, by detecting the concentration of volatile organic gas in the refrigerator through the odor sensor, the degree of food deterioration in the refrigerator can be measured based on the concentration, thereby helping users discard spoiled food in time and maintain the cleanliness of the refrigerator environment.

[0004] However, the inherent failure properties of metal oxide materials can make the odor sensor unresponsive to gas. When the odor sensor fails (i.e., malfunctions), the refrigerator cannot determine the extent of food deterioration in a timely manner, reducing the intelligence level of the refrigerator. Summary of the invention

[0005] The embodiments of the present application provide a refrigerator, a fault detection method, a device and a medium for an odor sensor of the refrigerator, which can be used to solve the problem that when the odor sensor fails due to the inherent failure properties of the material, the refrigerator cannot promptly determine the degree of food deterioration, resulting in a low level of intelligence of the refrigerator.

[0006] In a first aspect, an embodiment of the present application provides a refrigerator, the refrigerator comprising: a box body, an odor sensor and a controller;

[0007] The box body is provided with the odor sensor, and the odor sensor is used to detect the odor in the refrigerator; the odor sensor is connected to the controller; the controller is configured as follows:

[0008] Detecting the electrical signal of the odor sensor to determine a first change rate, where the first change rate is a change rate of the signal value at a current moment;

[0009] If the first change rate is below a first preset threshold, obtaining a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment;

[0010] Determining whether an abnormality occurs in the odor sensor according to the plurality of first signal values;

[0011] If an abnormality occurs in the odor sensor, an alarm message is generated.

[0012] In the embodiment of the present application, the controller connected to the odor sensor can detect the electrical signal of the odor sensor. When it is detected that the change rate of the electrical signal at the current moment is below the first preset threshold value, that is, it is determined that the change rate tends to 0, it can accurately determine whether the odor sensor is abnormal based on multiple first signal values ​​of the electrical signal within the subsequent preset time period. If an abnormality occurs, an alarm message is generated. Based on the change in the concentration of odorous gas in the refrigerator, the embodiment of the present application causes the electrical signal of the odor sensor to change. The refrigerator can perform self-diagnosis based on the electrical signal of the odor sensor and promptly determine whether the odor sensor is abnormal, thereby improving the intelligence level of the refrigerator.

[0013] In some embodiments of the present application, the controller is configured as follows:

[0014] determining a plurality of second change rates based on the plurality of first signal values;

[0015] Determine whether there is a change rate greater than a second preset threshold among the plurality of second change rates, the first preset threshold being less than the second preset threshold;

[0016] If yes, determine whether the odor sensor is abnormal according to a plurality of third change rates, wherein the plurality of third change rates are change rates of the signal value within n preset time periods after the first moment, the first moment is the end moment among the corresponding moments of the plurality of first signal values, and n is an integer greater than 1;

[0017] If not, determine whether the odor sensor is abnormal based on the changing trend of multiple fourth change rates, where the changing trend is increasing or decreasing, and the multiple fourth change rates are the changing rates of the signal value within a preset time period after the first moment.

[0018] In an embodiment of the present application, the controller can determine whether there is a change rate above a first preset threshold among multiple first change rates of the electrical signal within a subsequent preset time period to determine whether the change rate has changed significantly, so as to further determine whether the odor sensor is abnormal based on the signal value of the subsequent electrical signal, thereby improving the accuracy of the judgment.

[0019] In some embodiments of the present application, the controller is configured as follows:

[0020] Acquire multiple second signal values ​​of the electrical signal of the odor sensor within the n preset time lengths;

[0021] For any one of the n preset time periods, determining a plurality of third change rates according to a plurality of second signal values ​​within the preset time period;

[0022] Determining whether a plurality of third change rates within the n preset time periods are below the first preset threshold;

[0023] If yes, it is determined that the odor sensor is abnormal;

[0024] If not, it is determined that there is no abnormality in the odor sensor.

[0025] In an embodiment of the present application, if the rate of change changes significantly, it is possible to determine whether the multiple change rates of the electrical signal within the subsequent n preset time periods are below the first preset threshold, that is, whether they tend to 0, so as to further accurately determine whether an abnormality has occurred in the odor sensor.

[0026] In some embodiments of the present application, the controller is configured as follows:

[0027] Acquire multiple third signal values ​​of the electrical signal of the odor sensor within a preset time period after the first moment;

[0028] determining the plurality of fourth change rates according to the plurality of third signal values;

[0029] Determining whether the change trend of the plurality of fourth change rates is increasing;

[0030] If the change trend is increasing, it is determined that there is no abnormality in the odor sensor;

[0031] If the changing trend is not increasing, it is determined that the odor sensor is abnormal.

[0032] In the embodiment of the present application, if the rate of change has not changed significantly, it is possible to determine whether an abnormality has occurred in the odor sensor based on the changing trend of the rate of change of the electrical signal within a subsequent preset time period. If the changing trend is increasing, it means that the rate of change of the signal value of the odor sensor can increase with the increase of gas concentration, and the odor sensor is working normally, so as to further accurately judge whether an abnormality has occurred in the odor sensor.

[0033] In some embodiments of the present application, the refrigerator further includes an alarm device;

[0034] The alarm device is connected to the controller, and the controller is configured as follows:

[0035] Sending the warning information to the warning device;

[0036] Accordingly, the alarm device is configured as follows:

[0037] According to the alarm information, an alarm prompt is output, and the alarm prompt is used to prompt the user that the odor sensor has an abnormality.

[0038] In an embodiment of the present application, when an abnormality is detected in the odor sensor, the refrigerator can output an alarm prompt through an alarm device to inform the user that the odor sensor is abnormal and to promptly remind the user to replace the odor sensor.

[0039] In some embodiments of the present application, the controller is further configured to:

[0040] When detecting that the refrigerator door is opened, determining a second time when the refrigerator door is opened;

[0041] Acquire a plurality of fourth signal values ​​of a plurality of electrical signals within a preset time period after the second moment;

[0042] determining a plurality of fifth change rates based on the plurality of fourth signal values;

[0043] determining whether the plurality of fifth change rates are below the first preset threshold;

[0044] If yes, it is determined that the odor sensor is abnormal;

[0045] If not, it is determined that there is no abnormality in the odor sensor.

[0046] In an embodiment of the present application, the refrigerator can detect whether the refrigerator door is open. Since opening the refrigerator door will dilute the concentration of the odor gas in the refrigerator, the refrigerator can further accurately determine whether there is an abnormality in the odor sensor according to whether the rate of change of the signal value within a preset time period after the second moment the refrigerator door is opened is below a first preset threshold value in the scenario where the refrigerator door is opened.

[0047] In some embodiments of the present application, the electrical signal is a resistance signal, a current signal or a voltage signal.

[0048] In the embodiment of the present application, whether the odor sensor is abnormal can be determined by the signal value corresponding to the resistance signal, the current signal or the voltage signal.

[0049] In a second aspect, the present application provides a method for detecting a fault of an odor sensor of a refrigerator, the refrigerator comprising: a cabinet, an odor sensor, and a controller;

[0050] The odor sensor is arranged in the box body, and the odor sensor is used to detect the odor in the refrigerator; the odor sensor is connected to the controller;

[0051] The method comprises:

[0052] The controller detects the electrical signal of the odor sensor in the refrigerator to determine a first change rate, where the first change rate is a change rate of the signal value at a current moment;

[0053] If the first change rate is below a first preset threshold, obtaining a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment;

[0054] Determining, by the controller, whether an abnormality occurs in the odor sensor according to the plurality of first signal values;

[0055] If an abnormality occurs in the odor sensor, an alarm message is generated through the controller.

[0056] In a third aspect, the present application provides a fault detection device for an odor sensor of a refrigerator, the refrigerator comprising: a box, an odor sensor, and a controller;

[0057] The odor sensor is arranged in the box body, and the odor sensor is used to detect the odor in the refrigerator; the device includes:

[0058] A detection module, used to detect the electrical signal of the odor sensor and determine a first change rate, where the first change rate is a change rate of the signal value at a current moment;

[0059] an acquisition module, configured to acquire a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment if the first change rate is below a first preset threshold;

[0060] A determination module, configured to determine whether an abnormality occurs in the odor sensor according to the plurality of first signal values;

[0061] The alarm module is used to generate an alarm message if an abnormality occurs in the odor sensor.

[0062] The fault detection device for the odor sensor of the refrigerator provided in the embodiment of the present application can implement the technical solution in the above-mentioned method embodiment, and its beneficial effects are similar, which will not be repeated here.

[0063] In a fourth aspect, the present application provides a computer-readable storage medium having computer-executable instructions stored thereon. When the computer-executable instructions are executed by a processor, the method described in the second aspect is implemented.

[0064] The computer-readable storage medium provided in the embodiment of the present application can execute the technical solution in the above method embodiment, and its beneficial effects are similar, which will not be repeated here.

[0065] In a fifth aspect, the present application provides a computer program product, including a computer program, which implements the method described in the second aspect when executed by a processor.

[0066] The computer program product provided in the embodiment of the present application can execute the technical solution in the above method embodiment, and its beneficial effects are similar and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0068] Figure 1 A schematic diagram of an application scenario applicable to an embodiment of the present application;

[0069] Figure 2 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application;

[0070] Figure 3 A schematic diagram of the interaction between a refrigerator and a terminal device provided in an embodiment of the present application;

[0071] Figure 4 A schematic diagram of a flow chart of a method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application;

[0072] Figure 5 A schematic diagram of a curve showing changes of multiple first signal values ​​over time according to an example of the present application;

[0073] Figure 6 A schematic flow chart of another method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application;

[0074] Figure 7 A schematic diagram of the first moment and n preset time periods after the first moment of the example of this application;

[0075] Figure 8 A schematic flow chart of another method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application;

[0076] Fig. 9 A schematic flow chart of another method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application;

[0077] Fig.10 A schematic structural diagram of a fault detection device for an odor sensor of a refrigerator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0078] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0079] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0080] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0081] Metal oxide sensors are inexpensive and have good response values ​​to many volatile organic compounds (VOCs). The main gas produced by food spoilage is VOCs, and the more serious the food spoilage, the greater the concentration of VOCs produced. Therefore, by detecting the concentration of VOCs in the refrigerator, the degree of food spoilage in the refrigerator can be measured, which can help users discard spoiled food in time and maintain a clean refrigerator environment.

[0082] However, the inherent failure properties of the metal oxide material of the sensor will cause the material to be unresponsive to odorous gases, and the working environment of the odor sensor in the refrigerator is complex, which further increases the risk of failure when used in the refrigerator, thereby affecting the odor sensor's detection of odors in the refrigerator, greatly reducing the refrigerator's preservation effect on food, reducing the refrigerator's intelligence level, and failing to meet current users' needs for food preservation.

[0083] In view of the above problems, the present application proposes a fault detection method for an odor sensor of a refrigerator. By detecting the electrical signal of the odor sensor and judging whether the odor sensor is abnormal based on the rate of change of the signal value, the refrigerator can perform self-diagnosis based on the electrical signal of the odor sensor and promptly determine whether the odor sensor is abnormal, thereby improving the intelligence level of the refrigerator.

[0084] Below, for ease of understanding, Figure 1 The application scenarios to which the embodiments of the present application are applicable are described.

[0085] For example, Figure 1 A schematic diagram of an application scenario applicable to the embodiment of the present application is shown in FIG. Figure 1 As shown, an odor sensor 101 is provided in the body of the refrigerator 10, and the odor sensor 101 can be used to detect the odor caused by the deterioration of food in the refrigerator.

[0086] The controller (not shown in the figure) in the refrigerator 10 can detect the electrical signal of the odor sensor to determine whether the odor sensor 101 is abnormal based on the signal value of the electrical signal.

[0087] In a possible implementation, the controller can determine whether the odor sensor 101 is abnormal based on the magnitude of the rate of change of the electrical signal within a preset time period when the refrigerator is turned on. Figure 1 The scene shown in the figure is that the refrigerator door is open.

[0088] It is understood that the present application does not limit the location of the odor sensor 101 in the refrigerator 10, nor the shape and type of the refrigerator 10. Figure 1 These are examples only.

[0089] The technical solution of the present application is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0090] Figure 2 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the refrigerator may include a box body, an odor sensor and a controller, wherein the box body is provided with an odor sensor, the odor sensor is used to detect the odor in the refrigerator, and the odor sensor is connected to the controller.

[0091] The controller is used to obtain the signal value of the electrical signal of the odor sensor to determine whether an abnormality occurs in the odor sensor according to the signal value.

[0092] In a possible implementation, multiple odor sensors may be provided in the refrigerator, and the odor in the refrigerator may be detected by the multiple odor sensors. For any odor sensor, the method of determining whether an abnormality occurs is similar.

[0093] It should be understood that the present application does not limit whether the refrigerator includes other devices. In addition, the present application does not limit other functions of the refrigerator, such as refrigeration and freezing.

[0094] In a possible implementation, the controller may further include an alarm device connected to the controller. When the odor sensor is abnormal, the controller may prompt the user of the odor sensor abnormality through the alarm device.

[0095] In one possible implementation, Figure 3 As shown, when it is determined that the odor sensor is abnormal, the refrigerator can also send an alarm to the user's terminal device through the Internet to remind the user that the odor sensor is abnormal, so that the user can receive the alarm even when he is not near the refrigerator.

[0096] In a possible implementation, the controller may be a central processing unit (CPU) of a refrigerator mainboard.

[0097] For example, the alarm device may be a display panel disposed on the refrigerator body facing the user, or a buzzer or flashing light, etc. For example, if the alarm device is a display panel, the user may be prompted by a screen display or voice broadcast on the display panel. Alternatively, if the alarm device is a buzzer, the refrigerator may emit a sound through the buzzer to prompt the user when determining that the odor sensor is abnormal.

[0098] Based on the above refrigerator, Figure 4 The flowchart of a method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application is shown. The method may be executed by the controller described above or by a fault detection device for an odor sensor disposed in a refrigerator. The controller is used as an example for explanation. Figure 4 As shown, the method may include the following steps:

[0099] S401. Detect the electrical signal of the odor sensor to determine a first change rate, where the first change rate is a change rate of the signal value at a current moment.

[0100] The controller can detect the electrical signal of the odor sensor and determine the first change rate of the signal value at the current moment to determine whether the first change rate is below a first preset threshold. The first preset threshold can be a number greater than 0. For example, the first preset threshold is a smaller value such as 0.5 or 0.4. It can be understood that the first preset threshold is a value approaching 0. If the first change rate is below the second preset threshold, it can be considered that the first change rate approaches 0.

[0101] It can be understood that the signal value of the electrical signal of the odor sensor can change according to the change in the concentration of the odor gas in the refrigerator. If the change rate of the signal value of the electrical signal of the odor sensor is basically unchanged (that is, it tends to 0), it can generally be considered that the odor sensor is abnormal (that is, it fails). However, when the concentration of the odor gas in the refrigerator is stable, the change rate of the signal value of the electrical signal of the odor sensor can be considered to have reached a steady state, that is, it tends to 0. The controller can determine whether the first change rate is below the first preset threshold. If so, it can further determine whether the odor sensor is abnormal based on the subsequent electrical signal to prevent the odor sensor from being abnormal but being misjudged as abnormal because it is in a stable state.

[0102] In a possible implementation, if the controller fails to detect an electrical signal from the odor sensor, it may be caused by a power failure of the odor sensor, and it can be determined that an abnormality has occurred in the odor sensor.

[0103] S402: If the first change rate is below a first preset threshold, a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment are obtained.

[0104] If the first change rate is below the first preset threshold, the controller can obtain multiple first signal values ​​of the electrical signal of the odor sensor within a preset time after the current moment to determine whether the odor sensor is abnormal based on the multiple first signal values.

[0105] Exemplarily, multiple first signal values ​​can be obtained by the controller collecting a first signal value within a preset time period and after a collection cycle. It can be understood that the collection cycle is less than the preset time period. For example, the preset time period is 30 seconds and the collection cycle can be 1 second.

[0106] Alternatively, the time intervals of the multiple first signal values ​​collected by the controller may also be inconsistent, which is not limited in the present application.

[0107] In one possible implementation, the electrical signal may be a resistance signal, a current signal, a voltage signal, etc. These electrical signals may change according to the concentration of gas generated by food spoilage in the refrigerator. Whether the odor sensor has an abnormality may be determined by collecting the value of the electrical signal.

[0108] S403: Determine whether an abnormality occurs in the odor sensor according to the multiple first signal values.

[0109] After collecting multiple first signal values, the controller can determine whether an abnormality occurs in the odor sensor based on the multiple first signal values.

[0110] The controller determines whether an abnormality occurs in the odor sensor by, for example, determining a plurality of second change rates of a plurality of first signal values ​​within a preset time period to determine whether an abnormality occurs in the odor sensor.

[0111] Exemplarily, the plurality of first signal values ​​are signal values ​​that change with time, and the plurality of second change rates may be a plurality of slopes in a curve corresponding to the first signal value changing with time, for example, Figure 5 As shown, the horizontal axis represents time, and the vertical axis represents the first signal value. For example, if the electrical signal is a resistance signal, the first signal value is the resistance value. Figure 5 The vertical axis in the figure represents the resistance value, and the curve in the figure is only an example.

[0112] It should be understood that in the embodiment of the present application, each change rate may be a numerical value after taking the absolute value.

[0113] S404: If an abnormality occurs in the odor sensor, an alarm message is generated.

[0114] If it is determined that the odor sensor has an abnormality, the controller can generate an alarm message to notify the user of the abnormality of the odor sensor according to the alarm message, and promptly notify the user to replace the odor sensor.

[0115] In a possible implementation, the controller can notify the user that the odor sensor is abnormal through an alarm device. Exemplarily, the controller can send an alarm message to the alarm device, so that the alarm device can output an alarm prompt according to the alarm message, and the alarm prompt is used to notify the user that the odor sensor is abnormal.

[0116] In one possible implementation, multiple odor sensors may be provided in the refrigerator. If the refrigerator includes multiple odor sensors, the alarm information includes the identification of the odor sensor where the abnormality occurs, and may also include the location of the odor sensor in the refrigerator, which helps the user to identify the specific odor sensor where the abnormality occurs.

[0117] In this embodiment, the controller connected to the odor sensor can detect the electrical signal of the odor sensor and determine a first change rate, which is the change rate of the signal value at the current moment. If the first change rate is below a first preset threshold, multiple first signal values ​​of the electrical signal of the odor sensor within a preset time after the current moment are obtained, and then based on the multiple first signal values, it is determined whether the odor sensor is abnormal. If an abnormality occurs, an alarm message is generated. The embodiment of the present application is based on the change in the electrical signal of the odor sensor caused by the change in the concentration of the odor gas in the refrigerator, which can enable the refrigerator to perform self-diagnosis based on the electrical signal of the odor sensor and promptly determine whether the odor sensor is abnormal, thereby improving the intelligence level of the refrigerator.

[0118] Next, the method of determining whether an abnormality occurs in the odor sensor according to a plurality of first signal values ​​in the above embodiment is described in detail.

[0119] Figure 6 A flowchart of another method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application is provided. The method may be executed by the controller described above or by a fault detection device for an odor sensor disposed in a refrigerator. The controller is used as an example for explanation. Figure 6 As shown, the method may include the following steps:

[0120] S601. Obtain multiple first signal values.

[0121] S602: Determine a plurality of second change rates according to a plurality of first signal values.

[0122] S603: Determine whether there is a change rate above a second preset threshold among the multiple second change rates.

[0123] Among them, the first preset threshold is less than the second preset threshold. If there is a change rate above the second preset threshold among the multiple second change rates, execute S604; if there is no change rate above the second preset threshold among the multiple second change rates, execute S605.

[0124] The controller can determine whether there is a change rate above the second preset threshold among multiple second change rates within the preset time length. If so, it means that the second change rate within the preset time length has a large change. The odor sensor can be further judged based on the change rate of the signal value within the subsequent multiple preset time lengths to improve the accuracy of the judgment.

[0125] In a possible implementation, if there is no change rate above the second preset threshold value among the multiple second change rates, it can be considered that the odor sensor has failed.

[0126] In another possible implementation, if there is no change rate above the second preset threshold among the multiple second change rates, the change trend of multiple fourth change rates within the subsequent preset time period can be further judged to further accurately determine whether the odor sensor has an abnormality.

[0127] S604: Determine whether an abnormality occurs in the odor sensor based on the multiple third change rates.

[0128] If there is a change rate above the first preset threshold value among the multiple second change rates, the controller can determine whether the odor sensor is abnormal based on the multiple third change rates, wherein the multiple third change rates are the change rates of the signal value within n preset time periods after the first moment, and the first moment is the end moment among the moments corresponding to the multiple first signal values. From the time axis of the signal value change of the electrical signal, the end moment can be the moment corresponding to the last first signal value among the multiple first signal values. For example, Figure 7 As shown, Figure 7 This is a schematic diagram of a first moment and n preset time lengths after the first moment.

[0129] The controller may continue to obtain multiple second signal values ​​of the electrical signal within n preset time lengths, wherein n is an integer greater than 1, and from the time axis of the change in the signal value of the electrical signal, the moment corresponding to the second signal value is after the moment corresponding to the first signal value. For any one of the n preset time lengths, multiple third change rates are determined according to the multiple second signal values ​​within the preset time length.

[0130] S605. Determine whether an abnormality occurs in the odor sensor based on the changing trends of the plurality of fourth changing rates.

[0131] If there is no change rate above the second preset threshold among the multiple second change rates, the controller can determine whether an abnormality occurs in the odor sensor based on multiple fourth change rates, where the multiple fourth change rates are the change rates of the signal value within a preset time period after the first moment.

[0132] In this embodiment, when the controller determines that the first change rate is below the first preset threshold, it obtains multiple first signal values ​​of the electrical signal of the odor sensor within a preset time after the current moment, determines multiple second change rates based on the multiple first signal values, and then determines whether the odor sensor is abnormal based on the multiple second change rates. If an abnormality occurs, an alarm message is generated. This further improves the accuracy of the judgment, and timely determines whether the odor sensor is abnormal, thereby improving the intelligence level of the refrigerator.

[0133] When the refrigerator door is opened, the concentration of the odor gas in the refrigerator will be diluted, causing the gas concentration to decrease, thereby affecting the change in the signal value of the electrical signal of the odor sensor. If the odor sensor fails, it means that even if the odor concentration changes, the odor sensor has no response to it.

[0134] Next, the controller's determination of whether the odor sensor is abnormal when the refrigerator door is opened is described.

[0135] Figure 8A flowchart of another method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application is provided. The method may be executed by the controller described above or by a fault detection device for an odor sensor disposed in a refrigerator. The controller is used as an example for explanation. Figure 8 As shown, the method can include the following steps:

[0136] S801: When it is detected that the refrigerator door is opened, determine the second moment when the refrigerator door is opened.

[0137] The controller can detect the state of the refrigerator door, and when it is detected that the refrigerator door is opened, determine the second moment when the refrigerator door is opened.

[0138] S802: Acquire multiple fourth signal values ​​of multiple electrical signals within a preset time period after the second moment.

[0139] S803: Determine a plurality of fifth change rates according to a plurality of fourth signal values.

[0140] S804: Determine whether a plurality of fifth change rates are below a first preset threshold.

[0141] If yes, execute S805, if no, execute S806.

[0142] S805: Determine that an abnormality occurs in the odor sensor.

[0143] S806: Determine that there is no abnormality in the odor sensor.

[0144] It can be understood that the above-mentioned refrigerator door is the refrigerator door of the space where the odor sensor is located. For example, if the space where the odor sensor is located is a refrigerator room, then the refrigerator door is the door of the refrigerator room.

[0145] In this embodiment, by detecting whether the refrigerator door is open or not, the odor sensor can be detected to avoid errors caused by changes in odor concentration due to the opening and closing of the refrigerator door. As the food will continue to produce odors as long as it is spoiling, even if the change in the electrical signal is caused by the opening of the refrigerator door, if there is no abnormality in the odor sensor, after a period of stability, the change in the signal value of the electrical signal can be restored to the state before the refrigerator door is opened. Therefore, the self-diagnosis of the refrigerator will not be affected by external factors such as the opening and closing of the refrigerator door.

[0146] Fig. 9 A flowchart of another method for detecting a fault of an odor sensor of a refrigerator provided in an embodiment of the present application is provided. The method may be executed by the controller described above or by a fault detection device for an odor sensor disposed in a refrigerator. The controller is used as an example for explanation. Fig. 9 As shown, the method may include the following steps:

[0147] S901. Acquire multiple first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment.

[0148] S902: Determine a plurality of second change rates according to a plurality of first signal values.

[0149] S903: Determine whether there is a change rate above a second preset threshold among the multiple second change rates.

[0150] If there is a change rate greater than the second preset threshold value among the plurality of second change rates, S904 is executed; if there is no change rate greater than the second preset threshold value among the plurality of second change rates, S910 is executed.

[0151] S904. Acquire multiple second signal values ​​of the electrical signal of the odor sensor within n preset time lengths.

[0152] If there is a change rate above the second preset threshold value among the multiple second change rates, the controller may continue to collect multiple second signal values ​​of the electrical signal within n preset time lengths.

[0153] S905. For any one preset time period within the n preset time periods, determine a plurality of third change rates according to a plurality of second signal values ​​within the preset time period.

[0154] S906: Determine whether a plurality of third change rates within n preset time periods are below a first preset threshold.

[0155] If so, it means that the odor sensor is abnormal, and then execute S908. If not, it means that the odor sensor is not abnormal, that is, the odor sensor is not invalid, and then execute S907.

[0156] S907: Determine that there is no abnormality in the odor sensor.

[0157] S908: Determine that the odor sensor is abnormal.

[0158] S909: Generate warning information.

[0159] S910. Acquire multiple third signal values ​​of the electrical signal of the odor sensor within a preset time period after the first moment.

[0160] In a possible implementation, if there is no change rate above the first preset threshold value among the multiple first change rates, the controller may continue to collect multiple third signal values ​​of the electrical signal within a preset time length. The preset time length may be Figure 7 The first preset duration among the n preset durations in the example.

[0161] S911. Determine multiple fourth change rates according to multiple third signal values.

[0162] S912: Determine whether the change trend of the plurality of fourth change rates is increasing.

[0163] The controller can determine the changing trend of multiple fourth change rates and then judge whether the changing trend is increasing to determine whether the changing rate of the signal value within a subsequent preset time period is increasing when there is no change rate above the second preset threshold among the multiple second change rates, thereby determining whether the odor sensor is abnormal and further improving the accuracy of the judgment.

[0164] If yes, execute S907, if no, execute S908.

[0165] In a possible implementation, in order to further improve the accuracy of the judgment, after executing the above steps of this embodiment, the controller may repeat the above steps once or multiple times to determine whether the odor sensor is abnormal based on multiple judgment results.

[0166] In this embodiment, when the first change rate of the signal value at the current moment of the controller is below the first preset threshold value, multiple first signal values ​​of the electrical signal of the odor sensor within the preset time length at the current moment are obtained, and multiple second change rates are determined based on the multiple first signal values. Then, based on the multiple second change rates, it is determined whether the odor sensor is abnormal, and if an abnormality occurs, an alarm message is generated. Based on the change in the concentration of the odor gas in the refrigerator causing the electrical signal of the odor sensor to change, the embodiment of the present application can enable the refrigerator to perform self-diagnosis according to the change rate of the electrical signal of the odor sensor, thereby improving the accuracy of the judgment, and timely determining whether the odor sensor is abnormal, thereby improving the intelligence level of the refrigerator.

[0167] Regarding the size of the preset time length in the embodiment of the present application, the changes in the electrical signals of the odor sensor when common ingredients naturally deteriorate in the refrigerator and when the refrigerator door is opened or closed can be tested in advance, and the preset time length can be set according to the actual situation of the refrigerator.

[0168] Fig.10 This is a schematic diagram of a fault detection device for a refrigerator odor sensor provided in an embodiment of the present application. The device can be used in a controller of a refrigerator in any of the above embodiments, such as Fig.10 As shown, the device includes: a detection module 1001, an acquisition module 1002, a determination module 1003, and an alarm module 1004.

[0169] The detection module 1001 is used to detect the electrical signal of the odor sensor in the refrigerator and determine a first change rate, where the first change rate is a change rate of the signal value at a current moment.

[0170] The acquisition module 1002 is used to acquire multiple first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment if the first change rate is below a first preset threshold.

[0171] The determination module 1003 is used to determine whether an abnormality occurs in the odor sensor according to the multiple first signal values.

[0172] The alarm module 1004 is used to generate an alarm message if an abnormality occurs in the odor sensor.

[0173] In some embodiments of the present application, the determination module 1002 is specifically used to:

[0174] A plurality of second rates of change are determined based on the plurality of first signal values.

[0175] It is determined whether there is a change rate above a second preset threshold among the plurality of second change rates, and the first preset threshold is less than the second preset threshold.

[0176] If so, determine whether an abnormality occurs in the odor sensor based on multiple third change rates, where the multiple third change rates are the change rates of the signal values ​​within n preset time periods after the first moment, the first moment is the end moment among the corresponding moments of the multiple first signal values, and n is an integer greater than 1.

[0177] If not, determine whether the odor sensor is abnormal based on the changing trends of multiple fourth change rates, where the changing trends are increasing or decreasing, and multiple fourth change rates are the changing rates of the signal values ​​within a preset time period after the first moment.

[0178] In some embodiments of the present application, the determination module 1002 is specifically used to:

[0179] Acquire multiple second signal values ​​of the electrical signal of the odor sensor within n preset time lengths;

[0180] For any one preset time period within the n preset time periods, a plurality of third change rates are determined according to a plurality of second signal values ​​within the preset time period.

[0181] It is determined whether a plurality of third change rates within n preset time periods are below a first preset threshold.

[0182] If so, it is determined that the odor sensor is abnormal.

[0183] If not, it is determined that there is no abnormality in the odor sensor.

[0184] In some embodiments of the present application, the determination module 1002 is specifically used to:

[0185] A plurality of third signal values ​​of the electrical signal of the odor sensor within a preset time period after the first moment are acquired.

[0186] A plurality of fourth rates of change are determined based on the plurality of third signal values.

[0187] It is determined whether the change trend of the plurality of fourth change rates is increasing.

[0188] If the changing trend is increasing, it is determined that there is no abnormality in the odor sensor.

[0189] If the changing trend is not increasing, it is determined that the odor sensor is abnormal.

[0190] In some embodiments of the present application, the alarm module 1003 is specifically used to:

[0191] Receive the alarm information sent by the controller, and output an alarm prompt according to the alarm information through the alarm device. The alarm prompt is used to remind the user that the odor sensor has an abnormality.

[0192] In some embodiments of the present application, the determination module 1002 is further configured to:

[0193] When it is detected that the refrigerator door is opened, a second moment when the refrigerator door is opened is determined.

[0194] A plurality of fourth signal values ​​of the electrical signal within a preset time period after the second moment is acquired.

[0195] A plurality of fifth rates of change are determined based on the plurality of fourth signal values.

[0196] It is determined whether the plurality of fifth change rates are below a first preset threshold.

[0197] If so, it is determined that the odor sensor is abnormal.

[0198] If not, it is determined that there is no abnormality in the odor sensor.

[0199] The device provided in the embodiment of the present application can execute the fault detection method of the refrigerator odor sensor in the above method embodiment, and its implementation principle and technical effect are similar, which will not be repeated here. Figure 8 The division of the modules shown is only a schematic diagram, and the present application does not limit the division of the modules and the naming of the modules.

[0200] The embodiments of the present application also provide a computer-readable storage medium, which may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes. Specifically, the computer-readable storage medium stores computer execution instructions, and the computer execution instructions are used for the methods in the above embodiments.

[0201] The embodiment of the present application also provides a program product, which includes an execution instruction, which is stored in a readable storage medium. At least one control module of the display device can read the execution instruction from the readable storage medium, and at least one control module executes the execution instruction so that the display device implements the methods provided by the various embodiments described above.

[0202] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0203] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: The refrigerator comprises: a box body, an odor sensor and a controller; The box body is provided with the odor sensor, and the odor sensor is used to detect the odor in the refrigerator; the odor sensor is connected to the controller; the controller is configured as follows: Detecting the electrical signal of the odor sensor to determine a first change rate, where the first change rate is a change rate of the signal value at a current moment; If the first change rate is below a first preset threshold, obtaining a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment; Determining whether an abnormality occurs in the odor sensor according to the plurality of first signal values; If an abnormality occurs in the odor sensor, an alarm message is generated.

2. The refrigerator according to claim 1, characterized in that: The controller is configured to: determining a plurality of second change rates based on the plurality of first signal values; Determine whether there is a change rate greater than a second preset threshold among the plurality of second change rates, the first preset threshold being less than the second preset threshold; If yes, determine whether the odor sensor is abnormal according to a plurality of third change rates, wherein the plurality of third change rates are change rates of the signal value within n preset time periods after the first moment, the first moment is the end moment among the corresponding moments of the plurality of first signal values, and n is an integer greater than 1; If not, determine whether the odor sensor is abnormal based on the changing trend of multiple fourth change rates, where the changing trend is increasing or decreasing, and the multiple fourth change rates are the changing rates of the signal value within a preset time period after the first moment.

3. The refrigerator according to claim 2, characterized in that: The controller is configured to: Acquire multiple second signal values ​​of the electrical signal of the odor sensor within the n preset time lengths; For any one of the n preset time periods, determining a plurality of third change rates according to a plurality of second signal values ​​within the preset time period; Determining whether a plurality of third change rates within the n preset time periods are below the first preset threshold; If yes, it is determined that the odor sensor is abnormal; If not, it is determined that there is no abnormality in the odor sensor.

4. The refrigerator according to claim 2, characterized in that: The controller is configured to: Acquire a plurality of third signal values ​​of the electrical signal of the odor sensor within a preset time period after the first moment; determining the plurality of fourth change rates according to the plurality of third signal values; Determining whether the change trend of the plurality of fourth change rates is increasing; If the change trend is increasing, it is determined that there is no abnormality in the odor sensor; If the changing trend is not increasing, it is determined that the odor sensor is abnormal.

5. The refrigerator according to any one of claims 1 to 4, characterized in that: The refrigerator also includes an alarm device; The alarm device is connected to the controller, and the controller is configured as follows: Sending the warning information to the warning device; Accordingly, the alarm device is configured as follows: According to the alarm information, an alarm prompt is output, and the alarm prompt is used to prompt the user that the odor sensor has an abnormality.

6. The refrigerator according to any one of claims 1 to 4, characterized in that: The controller is also configured to: When detecting that the refrigerator door is opened, determining a second time when the refrigerator door is opened; Acquire a plurality of fourth signal values ​​of the electrical signal within a preset time period after the second moment; determining a plurality of fifth change rates based on the plurality of fourth signal values; determining whether the plurality of fifth change rates are below the first preset threshold; If yes, it is determined that the odor sensor is abnormal; If not, it is determined that there is no abnormality in the odor sensor.

7. The refrigerator according to any one of claims 1 to 6, characterized in that: The electrical signal is a resistance signal, a current signal or a voltage signal.

8. A method for detecting a fault of an odor sensor of a refrigerator, characterized in that: The refrigerator comprises: a box body, an odor sensor and a controller; The odor sensor is arranged in the box body, and the odor sensor is used to detect the odor in the refrigerator; the odor sensor is connected to the controller; The method comprises: The controller detects the electrical signal of the odor sensor in the refrigerator to determine a first change rate, where the first change rate is a change rate of the signal value at a current moment; If the first change rate is below a first preset threshold, obtaining a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment; Determining, by the controller, whether an abnormality occurs in the odor sensor according to the plurality of first signal values; If an abnormality occurs in the odor sensor, an alarm message is generated through the controller.

9. A fault detection device for an odor sensor of a refrigerator, characterized in that: The refrigerator comprises: a box body, an odor sensor and a controller; The odor sensor is arranged in the box body, and the odor sensor is used to detect the odor in the refrigerator; the device includes: A detection module, used to detect the electrical signal of the odor sensor and determine a first change rate, where the first change rate is a change rate of the signal value at a current moment; an acquisition module, configured to acquire a plurality of first signal values ​​of the electrical signal of the odor sensor within a preset time period after the current moment if the first change rate is below a first preset threshold; A determination module, configured to determine whether an abnormality occurs in the odor sensor according to the plurality of first signal values; The alarm module is used to generate an alarm message if an abnormality occurs in the odor sensor.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method of claim 8 is implemented.

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