Refrigerator test system and method

Abstract

The invention discloses a test system and method of a refrigerator. The test condition of a main control board of the refrigerator is obtained; sending the test condition to the main control board to enable the main control board to generate a control instruction for a load according to the test condition so as to control the load to operate; determining the operation state of the load according to the operation data of the load acquired by a data acquisition device arranged on the load; and judging whether the main control board is abnormal or not according to the test condition of the main control board and the running state of the load. By adopting the embodiment of the invention, in the testing process of the main control board of the refrigerator, the running state of the load can be automatically detected, and the abnormal type of the main control board can be judged, so that the testing accuracy is improved while the labor cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator testing system and method. Background Art

[0002] The refrigerator main control board test generally includes the main control board software logic test and electromagnetic compatibility test (EMC, Electromagnetic Compatibility).

[0003] When testing the software logic of the refrigerator main control board, it is often necessary to manually operate the sliding rheostat to change the resistance of the sensor, toggle the switch and other actions to adjust the input of the refrigerator main control board, and then judge whether the refrigerator main control board can control the refrigerator load according to the operating status of each load of the refrigerator to make corresponding adjustments. This process is very labor-intensive. At the same time, a large number of refrigerator control processes are related to practice, and it takes a fixed time to manually determine whether the load is operating correctly. If the time is missed, it needs to be re-judged, which is very time-consuming.

[0004] When conducting electromagnetic compatibility testing on the refrigerator main control board, it is necessary to conduct reliability tests such as group pulses and surges on the refrigerator main control board to ensure that all loads on the main control board are operating normally during the entire process. In the prior art, one automatic detection tool determines whether the load is operating normally by reading the LOG of the main control board MCU, but it cannot detect circuit hardware problems, and because the tool for reading the LOG changes the circuit loop of the main control board, it may cause inaccurate test results; another automatic detection tool determines the load operating status by reading the drive circuit signal to simulate the load, but this type of detection tool designs the load through a program, the circuit is complex, and the detection tool is prone to errors. In addition, this type of detection tool also needs to change the circuit loop of the main control board. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a refrigerator testing system and method, which can automatically detect the load operation status and make a main control board abnormality judgment during the refrigerator main control board testing process.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a refrigerator testing system, the refrigerator comprising:

[0007] a box body, in which at least one storage chamber is formed;

[0008] A door body, used for opening and closing the storage room;

[0009] at least one load, disposed inside or outside the box, and operated in a manner of consuming electrical energy;

[0010] A main control board, used for controlling the operation of the load;

[0011] The test system comprises:

[0012] A data acquisition device, disposed on the load, for collecting operating data of the load;

[0013] A controller configured to:

[0014] In response to a test instruction for the main control board, obtaining a test condition of the main control board;

[0015] Sending the test condition to the main control board, so that the main control board generates a control instruction for the load according to the test condition to control the operation of the load;

[0016] Determining the operating state of the load according to the operating data of the load collected by the data collection device;

[0017] According to the test condition of the main control board and the running state of the load, it is determined whether the main control board has an abnormal phenomenon.

[0018] As an improvement of the above solution, the refrigerator further includes a sensor, which is arranged inside or outside the box body and is used to collect environmental data of the refrigerator;

[0019] The obtaining of the test condition of the main control board includes:

[0020] Obtaining a preset sensor change curve and a preset door switch change curve, and generating a simulated sensor state and a simulated door switch state respectively through digital-to-analog conversion;

[0021] A test condition of the main control board is generated according to the simulated sensor state and the simulated door switch state.

[0022] As an improvement of the above solution, the step of obtaining a preset sensor change curve and a preset door switch change curve, and respectively generating an analog sensor state and an analog door switch state through digital-to-analog conversion includes:

[0023] Acquire a preset sensor change curve, generate an analog voltage value through digital-to-analog conversion to simulate the resistance value of the sensor, and obtain the simulated sensor state;

[0024] Acquire a preset door switch change curve, generate a level signal through digital-to-analog conversion to simulate the switch state of the door body, and obtain the simulated door switch state; wherein the level signal includes a high level signal and a low level signal, the high level signal indicates that the door body is in a closed state, and the low level signal indicates that the door body is in an open state.

[0025] As an improvement of the above solution, judging whether the main control board has an abnormal phenomenon according to the test condition of the main control board and the running state of the load includes:

[0026] Determining whether the test condition of the main control board matches the operating state of the load;

[0027] If they match, it is determined that the main control board has no abnormality;

[0028] If there is no match, it is determined that an abnormal phenomenon occurs on the main control board, and the type of abnormality that occurs on the main control board is determined according to the matching result.

[0029] As an improvement of the above solution, the load includes a compressor; the data acquisition device includes a vibration detection sensor provided on the compressor, for collecting a vibration signal of the compressor;

[0030] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0031] When the vibration detection sensor detects the vibration signal, it is determined that the compressor is in the on state;

[0032] When the vibration detection sensor does not detect the vibration signal, it is determined that the compressor is in a stopped state.

[0033] As an improvement of the above solution, the load includes a fan; the data acquisition device includes a wind speed sensor provided on the wind outlet side of the fan, for collecting the wind speed at the wind outlet side of the fan and forming a wind speed waveform diagram;

[0034] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0035] If the wind speed waveform recorded by the wind speed sensor tends to be stable, it is determined that the fan is in a normal working state;

[0036] If the wind speed waveform recorded by the wind speed sensor tends to fluctuate, it is determined that the wind turbine is in an abnormal operating state.

[0037] As an improvement of the above solution, the load includes a damper; the data acquisition device includes a first contact sensor provided on a door frame of the damper and a second contact sensor provided on a door edge of the damper, for collecting the opening of the damper;

[0038] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0039] obtaining a position of the damper according to a signal of the first contact sensor and a signal of the second contact sensor;

[0040] The opening degree of the damper is obtained according to the position of the damper.

[0041] As an improvement of the above solution, the load includes a lighting device arranged in the storage room; the data acquisition device includes a first light sensor arranged at the irradiation position of the lighting device, for collecting the light intensity at the irradiation position;

[0042] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0043] When the light intensity detected by the first light sensor is greater than a preset light intensity threshold, the lighting device is in an on state;

[0044] When the light intensity detected by the first light sensor is less than or equal to the light intensity threshold, it is determined that the lighting device is in an off state.

[0045] As an improvement of the above solution, the load includes a heating device; the data acquisition device includes a lighting device connected to the heating device and a second light sensor provided at the irradiation position of the lighting device, for reflecting the operating status of the heating device;

[0046] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0047] When the light intensity detected by the second light sensor is greater than a preset light intensity threshold, the heating device is in an on state;

[0048] When the light intensity detected by the second light sensor is less than or equal to the light intensity threshold, it is determined that the heating device is in an off state.

[0049] To achieve the above object, an embodiment of the present invention further provides a refrigerator testing method, the refrigerator comprising:

[0050] a box body, in which at least one storage chamber is formed;

[0051] A door body, used for opening and closing the storage room;

[0052] at least one load, disposed inside or outside the box, and operated in a manner of consuming electrical energy;

[0053] A main control board, used for controlling the operation of the load;

[0054] The method comprises:

[0055] Obtaining the test conditions of the main control board;

[0056] Sending the test condition to the main control board, so that the main control board generates a control instruction for the load according to the test condition to control the operation of the load;

[0057] Determining the operating state of the load according to the operating data of the load collected by a data collection device disposed on the load;

[0058] According to the test condition of the main control board and the running state of the load, it is determined whether the main control board has an abnormal phenomenon.

[0059] Compared with the prior art, the present invention discloses a refrigerator testing system and method, which obtains the test conditions of the refrigerator's main control board; sends the test conditions to the main control board so that the main control board generates a control instruction for the load according to the test conditions to control the operation of the load; determines the operating state of the load according to the operating data of the load collected by the data acquisition device provided on the load; and determines whether the main control board has an abnormal phenomenon according to the test conditions of the main control board and the operating state of the load. By adopting the embodiment of the present invention, during the test process of the refrigerator's main control board, the load operating state can be automatically detected and the main control board abnormality judgment can be performed, which reduces labor costs and improves the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0061] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0062] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0063] Figure 4 is a structural schematic diagram of the data acquisition device provided on the damper provided in an embodiment of the present invention;

[0064] Figure 5 is a first working flow diagram of the controller of the test system provided by an embodiment of the present invention;

[0065] Figure 6 is a flow chart of the controller according to an embodiment of the present invention obtaining the test conditions of the main control board;

[0066] Figure 7 is a flow chart of a controller according to an embodiment of the present invention determining the operating state of the compressor;

[0067] Figure 8 is a flow chart of a controller according to an embodiment of the present invention determining the operating state of the compressor;

[0068] Fig. 9 is a flow chart of a controller provided by an embodiment of the present invention for determining whether an abnormal phenomenon occurs on the main control board;

[0069] Fig.10 is a flow chart of the controller according to an embodiment of the present invention determining the abnormal type of the main control board;

[0070] Fig.11 The present invention provides a flow chart of a refrigerator testing method. DETAILED DESCRIPTION

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] See also Figure 1 , Figure 1 1 is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body defining a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0076] See also Figure 2 , Figure 2 : is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as refrigerators and freezers according to different uses. They can also include variable temperature rooms, vacuum drawers, moisturizing drawers, etc. Each storage room corresponds to one or more door bodies, for example, Figure 1 The upper storage room is provided with a double-opening door body. 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. The refrigerator door is provided with a display screen, which is used to display prompt information and receive user touch operations.

[0077] See also Figure 3 , Figure 3It is a structural schematic diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention, wherein the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. Among them, the compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 4; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 4, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 3, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0078] The refrigerator provided in an embodiment of the present invention includes at least one load, which is arranged inside or outside the box and operates in a manner of consuming electrical energy; the refrigerator also includes a main control board for controlling the operation of the load, and the main control board controls the load to complete the preset functions of the refrigerator, such as cooling, heating, dehumidification and lighting.

[0079] As a preferred implementation, the load includes a compressor, a fan, a damper, a lighting device and a heating device.

[0080] The control of the load by the main control board includes:

[0081] Controlling the compressor to turn on or off according to the actual temperature value of the storage chamber, the set temperature value of the storage chamber and the ambient temperature value;

[0082] Controlling the opening or closing of the fan and the opening degree of the damper according to the actual temperature value of the storage chamber and the set temperature value of the storage chamber;

[0083] Controlling the lighting device to be turned on or off according to the opening or closing of the door body;

[0084] The heating device is controlled to be turned on or off according to the actual temperature value of the storage chamber and the timer signal.

[0085] It should be noted that the above scenario is only used as an example. In actual application, the load of the refrigerator and the control logic of the main control board on the load can be set according to actual needs to complete the functions of the refrigerator, which will not affect the beneficial effects achieved by the present invention.

[0086] The test system comprises a data acquisition device, which is arranged on the load and is used to collect operating data of the load.

[0087] Preferably, the load includes a compressor, a fan, a damper, a lighting device and a heating device provided in the storage room; then, the data acquisition device and its settings include:

[0088] A vibration detection sensor, provided on the compressor, for collecting a vibration signal of the compressor;

[0089] A wind speed sensor is provided at the air outlet side of the fan, and is used to collect the wind speed at the air outlet side of the fan and form a wind speed waveform diagram;

[0090] Contact sensor, see Figure 4 , Figure 4 1 is a schematic diagram of the structure of the data acquisition device provided on the damper according to an embodiment of the present invention. The contact sensor comprises a first contact sensor 101 and a second contact sensor 102, wherein the first contact sensor is provided on the door frame of the damper, and the second contact sensor is provided on the door edge of the damper, for collecting the opening of the damper.

[0091] A first light sensor is provided at an irradiation position of the illuminating device and is used to collect light intensity at the irradiation position;

[0092] A lighting device and a second light sensor, wherein the lighting device is connected to the heating device, and the second light sensor is arranged at the irradiation position of the lighting device to reflect the operating status of the heating device.

[0093] The working state of the heating device is difficult to obtain by directly setting a sensor. The present invention connects a lighting device to the heating device and then detects the light intensity of the lighting device to obtain the operating state of the heating device. When the heating device is in the on state, the current in the circuit of the lighting device connected to it is connected, and the light is on; when the heating device is in the off state, no current flows through the circuit of the lighting device, and the light is off.

[0094] As an example, the heating device includes a heating wire, and the lighting device is an LED lamp. By connecting the LED lamp to the heating wire circuit, when the heating wire works, the LED lamp lights up; when the heating wire stops working, the LED lamp goes out.

[0095] Specifically, the controller of the test system is configured to: obtain the test conditions of the main control board in response to the test instructions for the main control board; send the test conditions to the main control board so that the main control board generates control instructions for the load according to the test conditions to control the operation of the load; determine the operating status of the load according to the operating data of the load collected by the data acquisition device; and determine whether the main control board has any abnormal phenomenon according to the test conditions of the main control board and the operating status of the load.

[0096] For example, see Figure 5 , Figure 5 is a first working flow chart of the controller of the test system provided by an embodiment of the present invention, wherein the controller is configured to execute steps S11 to S14:

[0097] S11, in response to a test instruction for the main control board, obtaining a test condition of the main control board, and then proceeding to step S12;

[0098] S12, sending the test conditions to the main control board, and then entering step S13;

[0099] S13, determining the operating state of the load according to the operating data of the load collected by the data collection device, and then proceeding to step S14;

[0100] S14. Determine whether the main control board has an abnormality according to the test condition of the main control board and the operating status of the load.

[0101] The testing process of the main control board is to test the test logic of the main control board in different environments, and judge whether the main control board can drive the corresponding load according to the change of the input signal. The different environments include different electromagnetic environments. In the actual use environment of the refrigerator, there are electromagnetic signals from various sources, which may interfere with the main control board. Therefore, it is necessary to perform reliability tests on the main control board in different electromagnetic environments. The input signal includes the sensor status and the door switch status.

[0102] As a preferred implementation, the test conditions of the main control board include the actual temperature value of the storage chamber, the set temperature value of the storage chamber, the ambient temperature value, the switch state of the door body and the timer signal.

[0103] It should be noted that the test conditions of the main control board include data generated by simulation of the test system. During industrial logic testing of the main control board, the simulation of the test conditions is achieved by simulating the input signal of the main control board.

[0104] As a preferred embodiment, the refrigerator further includes a sensor, which is arranged inside or outside the box and is used to collect environmental data of the refrigerator.

[0105] As an example, the sensors include: an ambient temperature sensor, arranged outside the box, for detecting the ambient temperature value; an ambient humidity sensor, arranged outside the box, for detecting the ambient humidity value; a compartment temperature sensor, arranged inside the storage room, for detecting the actual temperature value of each storage room; a human body sensing sensor, arranged outside the box, for detecting whether someone is approaching the refrigerator.

[0106] It should be noted that the environmental data collected by the sensor of the refrigerator is used as the input signal of the main control board when the refrigerator is in normal use. In order to test the main control board by adjusting the original input signal of the main control board, the refrigerator needs to be placed in a specific working environment, and the process takes a lot of time. The embodiment of the present invention can simplify the test process by simulating the input signal of the main control board through the test system.

[0107] Further, see Figure 6 , Figure 6 1 is a flow chart of a controller obtaining a test condition of the main control board provided by an embodiment of the present invention, wherein the controller is configured to execute steps S111 to S112:

[0108] S111 . Obtain a preset sensor change curve and a preset door switch change curve, and respectively generate an analog sensor state and an analog door switch state through digital-to-analog conversion.

[0109] It should be noted that the simulated sensor state includes the simulated value of the sensor signal input to the main control board. Specifically, the simulator state in the embodiment of the present invention includes the simulated value of the ambient temperature sensor and the simulated value of the compartment temperature sensor.

[0110] S112. Generate test conditions for the main control board according to the simulated sensor state and the simulated door switch state.

[0111] As a preferred implementation, generating the simulated sensor state includes: acquiring the preset sensor change curve, generating an analog voltage value through digital-to-analog conversion to simulate the resistance of the sensor, and obtaining the simulated sensor state.

[0112] The sensor state in the input signal of the main control board is determined by the voltage value collected by AD through the MCU port on the main control board. Therefore, the embodiment of the present invention can simulate the sensor by simulating the voltage value.

[0113] As a preferred embodiment, generating the simulated door switch state includes: obtaining a preset door switch change curve, generating a level signal through digital-to-analog conversion to simulate the switch state of the door body, and obtaining the simulated door switch state; wherein the level signal includes a high level signal and a low level signal, the high level signal indicates that the door body is in a closed state, and the low level signal indicates that the door body is in an open state.

[0114] For example, during the actual use of the refrigerator, when the door is open, the door switch level signal received by the main control board is 0V; when the door is closed, the door switch level signal received by the main control board is 5V. Therefore, the simulated door switch state can be obtained by simply inputting a voltage value of 0V or 5V to the input interface of the door switch level signal of the main control board.

[0115] It should be noted that, during the logic test of the main control board, its original input signal needs to be cut off and the door body is in an open state. The original input signal comes from the signal detected by the sensor of the refrigerator and the signal of the door body, and there is an electrical connection between the main control board, the sensor and the door body. When the door body is in a closed state, the door switch level signal received by the main control board is in a high level state. At this time, if a low level value is input to the main control board from the outside, it is equivalent to the circuit of the input low level value being in a disconnected state. Finally, the door switch state obtained by the main control board is always in a closed state, which will result in the inability to fully test the main control board. When the door body is in an open state, the door switch level signal received by the main control board is consistent with the simulated door switch state. It can be understood that the original input signal may conflict with the simulated sensor state. During the test process, the simulated sensor state should be used as the standard. Therefore, it is necessary to disconnect the original input signal so that the input signal of the main control board is all from the simulated signal of the test system, so as to ensure the accuracy of the test.

[0116] As a preferred implementation, the load includes a compressor, and the data acquisition device includes a vibration detection sensor provided on the compressor, for collecting a vibration signal of the compressor;

[0117] See also Figure 7 , Figure 7 1 is a flow chart of a controller determining the operating state of the compressor provided by an embodiment of the present invention. The controller is configured to execute steps S1311 to S1313.

[0118] When the vibration detection sensor detects the vibration signal, it is determined that the compressor is in an on state; when the vibration detection sensor does not detect the vibration signal, it is determined that the compressor is in a stopped state.

[0119] As a preferred embodiment, the load includes a fan; the data acquisition device includes a wind speed sensor provided on the wind outlet side of the fan, for collecting the wind speed at the wind outlet side of the fan and forming a wind speed waveform diagram;

[0120] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0121] If the wind speed waveform recorded by the wind speed sensor tends to be stable, it is determined that the fan is in a normal working state;

[0122] If the wind speed waveform recorded by the wind speed sensor tends to fluctuate, it is determined that the wind turbine is in an abnormal operating state.

[0123] As an example, the fluctuation state includes the wind speed waveform recorded by the wind speed sensor repeatedly rising and falling to form a V-shaped waveform, and at this time, the wind turbine is in an abnormal working state.

[0124] As a preferred embodiment, the load includes a damper; the data acquisition device includes a first contact sensor 101 provided on a door frame of the damper and a second contact sensor 102 provided on a door edge of the damper, for acquiring the opening of the damper;

[0125] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0126] obtaining a position of the damper according to a signal of the first contact sensor and a signal of the second contact sensor;

[0127] The opening degree of the damper is obtained according to the position of the damper.

[0128] As a preferred embodiment, the load includes a lighting device disposed in the storage room; the data acquisition device includes a first light sensor disposed at an irradiation position of the lighting device, for collecting light intensity at the irradiation position;

[0129] See also Figure 8 , Figure 8 1 is a flow chart of a controller determining the operating state of the compressor provided by an embodiment of the present invention. The controller is configured to execute steps S1321 to S1323.

[0130] When the light intensity detected by the first light sensor is greater than a preset light intensity threshold, the lighting device is in an on state; when the light intensity detected by the first light sensor is less than or equal to the light intensity threshold, the lighting device is in an off state.

[0131] As a preferred embodiment, the load includes a heating device; the data acquisition device includes a lighting device connected to the heating device and a second light sensor provided at the irradiation position of the lighting device, for reflecting the operating state of the heating device;

[0132] Determining the operating state of the load according to the operating data of the load collected by the data collection device includes:

[0133] When the light intensity detected by the second light sensor is greater than a preset light intensity threshold, the heating device is in an on state;

[0134] When the light intensity detected by the second light sensor is less than or equal to the light intensity threshold, it is determined that the heating device is in an off state.

[0135] See also Fig. 9 , Fig. 9 It is a flow chart of a controller provided by an embodiment of the present invention for determining whether an abnormal phenomenon occurs on the main control board, and the controller is configured to execute steps S141 to S143.

[0136] S141: Determine whether the test condition of the main control board matches the operating state of the load, if so, execute step S142, if not, execute step S143.

[0137] It should be noted that the determination of whether the test condition of the main control board matches the operating state of the load is based on the original judgment logic of the main control board for the load.

[0138] As an example, when the simulated door switch state is in the open state, that is, the test condition of the main control board is that the door body is open, the main control board should control the lighting device of the storage room to turn on. At this time, if it is detected that the lighting device of the storage room is turned on, it is determined that the test condition of the main control board matches the operating state of the load, otherwise it is determined to be mismatched.

[0139] S142: Determine that the main control board is not in an abnormal state.

[0140] S143: Determine whether the main control board has an abnormal phenomenon, and determine the type of abnormality that has occurred on the main control board according to the matching result.

[0141] As a preferred implementation, the types of abnormalities that occur on the main control board include: reset, operation logic disorder and crash. Fig.10 , Fig.10 It is a flowchart of a controller determining the abnormality type occurring on the main control board provided by an embodiment of the present invention, and the controller is configured to execute steps S1431 to S1436.

[0142] Further, when the wind speed waveform recorded by the wind speed sensor tends to a waveform state, specifically, when the waveform of the wind speed waveform repeatedly rises and falls or a V-shaped waveform appears, that is, when the operating state of the fan is an abnormal working state, at this time, no matter what the test conditions of the main control board are, it is determined that the test conditions of the main control board and the operating state of the load do not match, and the abnormal type of the main control board is reset. When the test conditions continue to change, and the operating state of the load does not change, the abnormal type of the main control board is a freeze. In other cases, when the test conditions are sent to the main control board, and the load does not operate according to the preset logic of the main control board, the abnormal type of the main control board is an operating logic disorder.

[0143] In the prior art, the LOG of the main control board MCU is read to determine whether the load is running normally, but this method cannot detect the hardware problem of the circuit, that is, it cannot determine the abnormal type of the reset and crash of the main control board. The refrigerator test system provided by the present invention does not directly read the running status of the load from the main control board, and ensures that the input signal of the refrigerator main control board comes from the test system, which can detect various abnormalities of the main control board and ensure the accuracy of the test results.

[0144] For example, the test condition is the temperature of the storage room. When the simulated value of the compartment temperature sensor in the simulated sensor state is greater than a preset threshold, if it is detected that the fan is not turned on, it is determined that the test condition of the main control board does not match the operating state of the load. After analysis, it is found that the abnormality of the main control board is not a reset or a crash, and the abnormality of the main control board is an operational logic disorder.

[0145] Compared with the prior art, the refrigerator test system disclosed in the present invention obtains the test conditions of the refrigerator's main control board; sends the test conditions to the main control board so that the main control board generates a control instruction for the load according to the test conditions to control the operation of the load; determines the operating state of the load according to the operating data of the load collected by the data acquisition device provided on the load; and determines whether the main control board has an abnormal phenomenon according to the test conditions of the main control board and the operating state of the load. By adopting the embodiment of the present invention, during the test process of the refrigerator's main control board, the load operating state can be automatically detected and the abnormal type of the main control board can be determined, thereby reducing labor costs and improving the accuracy of the test.

[0146] See also Fig.11 , Fig.11 This is a flow chart of a refrigerator testing method provided by an embodiment of the present invention. The refrigerator comprises a box body, in which at least one storage chamber is formed; a door body, used to open and close the storage chamber; at least one load, which is arranged inside or outside the box body and operates in a manner of consuming electric energy; a main control board, used to control the operation of the load; the refrigerator testing method comprises steps S21 to S24.

[0147] S21, obtaining the test conditions of the main control board.

[0148] As a preferred implementation, the test conditions of the main control board include the actual temperature value of the storage chamber, the set temperature value of the storage chamber, the ambient temperature value, the switch state of the door body and the timer signal.

[0149] It should be noted that the test conditions of the main control board include data generated by simulation of the test system. During industrial logic testing of the main control board, the simulation of the test conditions is achieved by simulating the input signal of the main control board.

[0150] S22. Send the test condition to the main control board, so that the main control board generates a control instruction for the load according to the test condition to control the operation of the load.

[0151] S23. Determine the operating state of the load according to the operating data of the load collected by the data collection device disposed on the load.

[0152] S24. Determine whether the main control board has an abnormality according to the test condition of the main control board and the operating status of the load.

[0153] As a preferred implementation manner, the obtaining of the test condition of the main control board includes:

[0154] Obtaining a preset sensor change curve and a preset door switch change curve, and generating a simulated sensor state and a simulated door switch state respectively through digital-to-analog conversion;

[0155] A test condition of the main control board is generated according to the simulated sensor state and the simulated door switch state.

[0156] Further, as a preferred implementation, the obtaining of a preset sensor change curve and a preset door switch change curve, and respectively generating an analog sensor state and an analog door switch state through digital-to-analog conversion, includes:

[0157] Acquire a preset sensor change curve, generate an analog voltage value through digital-to-analog conversion to simulate the resistance value of the sensor, and obtain the simulated sensor state;

[0158] Acquire a preset door switch change curve, generate a level signal through digital-to-analog conversion to simulate the switch state of the door body, and obtain the simulated door switch state; wherein the level signal includes a high level signal and a low level signal, the high level signal indicates that the door body is in a closed state, and the low level signal indicates that the door body is in an open state.

[0159] The sensor state in the input signal of the main control board is determined by the voltage value collected by AD through the MCU port on the main control board. Therefore, the embodiment of the present invention can simulate the sensor by simulating the voltage value.

[0160] For example, during the actual use of the refrigerator, when the door is open, the door switch level signal received by the main control board is 0V; when the door is closed, the door switch level signal received by the main control board is 5V. Therefore, the simulated door switch state can be obtained by simply inputting a voltage value of 0V or 5V to the input interface of the door switch level signal of the main control board.

[0161] It should be noted that, during the logic test of the main control board, its original input signal needs to be cut off and the door body is in an open state. The original input signal comes from the signal detected by the sensor of the refrigerator and the signal of the door body, and there is an electrical connection between the main control board, the sensor and the door body. When the door body is in a closed state, the door switch level signal received by the main control board is in a high level state. At this time, if a low level value is input to the main control board from the outside, it is equivalent to the circuit of the input low level value being in a disconnected state. Finally, the door switch state obtained by the main control board is always in a closed state, which will result in the inability to fully test the main control board. When the door body is in an open state, the door switch level signal received by the main control board is consistent with the simulated door switch state. It can be understood that the original input signal may conflict with the simulated sensor state. During the test process, the simulated sensor state should be used as the standard. Therefore, it is necessary to disconnect the original input signal so that the input signal of the main control board is all from the simulated signal of the test system, so as to ensure the accuracy of the test.

[0162] As a preferred implementation, the load includes a compressor, and the data acquisition device includes a vibration detection sensor provided on the compressor, for collecting a vibration signal of the compressor;

[0163] Determining the operating state of the compressor includes:

[0164] When the vibration detection sensor detects the vibration signal, it is determined that the compressor is in an on state; when the vibration detection sensor does not detect the vibration signal, it is determined that the compressor is in a stopped state.

[0165] As a preferred embodiment, the load includes a fan; the data acquisition device includes a wind speed sensor provided on the wind outlet side of the fan, for collecting the wind speed at the wind outlet side of the fan and forming a wind speed waveform diagram;

[0166] Determining the operating state of the fan includes:

[0167] If the wind speed waveform recorded by the wind speed sensor tends to be stable, it is determined that the fan is in a normal working state;

[0168] If the wind speed waveform recorded by the wind speed sensor tends to fluctuate, it is determined that the wind turbine is in an abnormal operating state.

[0169] As an example, the fluctuation state includes the wind speed waveform recorded by the wind speed sensor repeatedly rising and falling to form a V-shaped waveform, and at this time, the wind turbine is in an abnormal working state.

[0170] As a preferred embodiment, the load includes a damper; the data acquisition device includes a first contact sensor 101 provided on a door frame of the damper and a second contact sensor 102 provided on a door edge of the damper, for acquiring the opening of the damper;

[0171] Determining the operating state of the damper includes:

[0172] obtaining a position of the damper according to a signal of the first contact sensor and a signal of the second contact sensor;

[0173] The opening degree of the damper is obtained according to the position of the damper.

[0174] As a preferred embodiment, the load includes a lighting device disposed in the storage room; the data acquisition device includes a first light sensor disposed at an irradiation position of the lighting device, for collecting light intensity at the irradiation position;

[0175] Determining the operating state of the lighting device includes:

[0176] When the light intensity detected by the first light sensor is greater than a preset light intensity threshold, the lighting device is in an on state; when the light intensity detected by the first light sensor is less than or equal to the light intensity threshold, the lighting device is in an off state.

[0177] As a preferred embodiment, the load includes a heating device; the data acquisition device includes a lighting device connected to the heating device and a second light sensor provided at the irradiation position of the lighting device, for reflecting the operating state of the heating device;

[0178] Determining the operating state of the heating device includes:

[0179] When the light intensity detected by the second light sensor is greater than a preset light intensity threshold, the heating device is in an on state;

[0180] When the light intensity detected by the second light sensor is less than or equal to the light intensity threshold, it is determined that the heating device is in an off state.

[0181] As a preferred implementation manner, judging whether the main control board has an abnormal phenomenon according to the test condition of the main control board and the operating state of the load includes:

[0182] Determining whether the test condition of the main control board matches the operating state of the load;

[0183] If they match, it is determined that the main control board has no abnormality;

[0184] If there is no match, it is determined that an abnormal phenomenon occurs on the main control board, and the type of abnormality that occurs on the main control board is determined according to the matching result.

[0185] As a preferred implementation, the abnormality types of the main control board include: reset, operation logic disorder and crash. The determining that the abnormality type of the main control board is operation logic disorder includes: the abnormality type of the main control board is not reset or crash.

[0186] Further, when the wind speed waveform recorded by the wind speed sensor tends to a waveform state, specifically, when the waveform of the wind speed waveform repeatedly rises and falls or a V-shaped waveform appears, that is, when the operating state of the fan is an abnormal working state, at this time, no matter what the test conditions of the main control board are, it is determined that the test conditions of the main control board and the operating state of the load do not match, and the abnormal type of the main control board is reset. When the test conditions continue to change, and the operating state of the load does not change, the abnormal type of the main control board is a freeze. In other cases, when the test conditions are sent to the main control board, and the load does not operate according to the preset logic of the main control board, the abnormal type of the main control board is an operating logic disorder.

[0187] In the prior art, the LOG of the main control board MCU is read to determine whether the load is running normally, but this method cannot detect the hardware problem of the circuit, that is, it cannot determine the abnormal type of the reset and crash of the main control board. The refrigerator test system provided by the present invention does not directly read the running status of the load from the main control board, and ensures that the input signal of the refrigerator main control board comes from the test system, which can detect various abnormalities of the main control board and ensure the accuracy of the test results.

[0188] As an example, the test condition is the temperature of the storage room. When the analog value of the compartment temperature sensor in the analog sensor state is greater than a preset threshold, if it is detected that the fan is not turned on, it is determined that the test condition of the main control board does not match the operating state of the load. After analysis, it is found that the abnormality type of the main control board is not reset or freeze, then the abnormality type of the main control board is an operating logic disorder.

[0189] Compared with the prior art, the refrigerator testing method disclosed in the present invention obtains the test conditions of the refrigerator's main control board; sends the test conditions to the main control board so that the main control board generates a control instruction for the load according to the test conditions to control the operation of the load; determines the operating state of the load according to the operating data of the load collected by the data acquisition device provided on the load; and determines whether the main control board has an abnormal phenomenon according to the test conditions of the main control board and the operating state of the load. By adopting the embodiment of the present invention, during the test process of the refrigerator's main control board, the load operating state can be automatically detected and the abnormal type of the main control board can be determined, thereby reducing labor costs and improving the accuracy of the test.

[0190] 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 testing system, characterized in that: The refrigerator comprises: a box body, in which at least one storage chamber is formed; A door body, used for opening and closing the storage room; at least one load, disposed inside or outside the box, and operated in a manner of consuming electrical energy; A main control board, used for controlling the operation of the load; The test system comprises: A data acquisition device, disposed on the load, for collecting operating data of the load; A controller configured to: In response to a test instruction for the main control board, obtaining a test condition of the main control board; Sending the test condition to the main control board, so that the main control board generates a control instruction for the load according to the test condition to control the operation of the load; Determining the operating state of the load according to the operating data of the load collected by the data collection device; According to the test condition of the main control board and the running state of the load, it is determined whether the main control board has an abnormal phenomenon.

2. The refrigerator testing system according to claim 1, characterized in that: The refrigerator further comprises a sensor, which is arranged inside or outside the box and is used to collect environmental data of the refrigerator; The obtaining of the test condition of the main control board includes: Obtaining a preset sensor change curve and a preset door switch change curve, and generating a simulated sensor state and a simulated door switch state respectively through digital-to-analog conversion; A test condition of the main control board is generated according to the simulated sensor state and the simulated door switch state.

3. The refrigerator testing system according to claim 2, characterized in that: The step of acquiring a preset sensor change curve and a preset door switch change curve, and respectively generating an analog sensor state and an analog door switch state through digital-to-analog conversion, includes: Acquire a preset sensor change curve, generate an analog voltage value through digital-to-analog conversion to simulate the resistance value of the sensor, and obtain the simulated sensor state; Acquire a preset door switch change curve, generate a level signal through digital-to-analog conversion to simulate the switch state of the door body, and obtain the simulated door switch state; wherein the level signal includes a high level signal and a low level signal, the high level signal indicates that the door body is in a closed state, and the low level signal indicates that the door body is in an open state.

4. The refrigerator testing system according to claim 1, characterized in that: The determining whether the main control board has an abnormality according to the test condition of the main control board and the operating state of the load includes: Determining whether the test condition of the main control board matches the operating state of the load; If they match, it is determined that the main control board has no abnormality; If there is no match, it is determined that an abnormal phenomenon occurs on the main control board, and the type of abnormality that occurs on the main control board is determined according to the matching result.

5. The refrigerator testing system according to claim 1, characterized in that: The load includes a compressor; the data acquisition device includes a vibration detection sensor provided on the compressor, for collecting a vibration signal of the compressor; Determining the operating state of the load according to the operating data of the load collected by the data collection device includes: When the vibration detection sensor detects the vibration signal, it is determined that the compressor is in the on state; When the vibration detection sensor does not detect the vibration signal, it is determined that the compressor is in a stopped state.

6. The refrigerator testing system according to claim 1, characterized in that: The load includes a fan; the data acquisition device includes a wind speed sensor provided on the wind outlet side of the fan, for collecting the wind speed at the wind outlet side of the fan and forming a wind speed waveform diagram; Determining the operating state of the load according to the operating data of the load collected by the data collection device includes: If the wind speed waveform recorded by the wind speed sensor tends to be stable, it is determined that the fan is in a normal working state; If the wind speed waveform recorded by the wind speed sensor tends to fluctuate, it is determined that the wind turbine is in an abnormal operating state.

7. The refrigerator testing system according to claim 1, characterized in that: The load includes a damper; the data acquisition device includes a first contact sensor provided on a door frame of the damper and a second contact sensor provided on a door edge of the damper, for acquiring the opening of the damper; Determining the operating state of the load according to the operating data of the load collected by the data collection device includes: obtaining a position of the damper according to a signal of the first contact sensor and a signal of the second contact sensor; The opening degree of the damper is obtained according to the position of the damper.

8. The refrigerator testing system according to claim 1, characterized in that: The load includes a lighting device disposed in the storage room; the data acquisition device includes a first light sensor disposed at an irradiation position of the lighting device, for collecting light intensity at the irradiation position; Determining the operating state of the load according to the operating data of the load collected by the data collection device includes: When the light intensity detected by the first light sensor is greater than a preset light intensity threshold, the lighting device is in an on state; When the light intensity detected by the first light sensor is less than or equal to the light intensity threshold, it is determined that the lighting device is in an off state.

9. The refrigerator testing system according to claim 1, characterized in that: The load includes a heating device; the data acquisition device includes a lighting device connected to the heating device and a second light sensor provided at the irradiation position of the lighting device, for reflecting the operating status of the heating device; Determining the operating state of the load according to the operating data of the load collected by the data collection device includes: When the light intensity detected by the second light sensor is greater than a preset light intensity threshold, the heating device is in an on state; When the light intensity detected by the second light sensor is less than or equal to the light intensity threshold, it is determined that the heating device is in an off state.

10. A refrigerator testing method, characterized in that: The refrigerator comprises: a box body, in which at least one storage chamber is formed; A door body, used for opening and closing the storage room; at least one load, disposed inside or outside the box, and operated in a manner of consuming electrical energy; A main control board, used for controlling the operation of the load; The method comprises: Obtaining the test conditions of the main control board; Sending the test condition to the main control board, so that the main control board generates a control instruction for the load according to the test condition to control the operation of the load; Determining the operating state of the load according to the operating data of the load collected by a data collection device disposed on the load; According to the test condition of the main control board and the running state of the load, it is determined whether the main control board has an abnormal phenomenon.

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