Load simulation tool for testing main control board of refrigerator

Abstract

The utility model discloses a load simulation tool used for testing a refrigerator main control board, comprising a housing in which are arranged: a load simulation module comprising a plurality of simulation units; the plurality of simulation units are electrically connected with corresponding simulation unit plugging interfaces respectively, and the simulation unit plugging interfaces extend outwards from the shell and are operably connected with a tested main control board; one path of the power supply module is electrically connected with the power interface, and the other path of the power supply module is electrically connected with the corresponding power supply module plugging interface; the power supply interface is operably connected with a mains supply, and the power supply module plugging interface extends outwards from the shell and is operably connected with a tested main control board. According to the utility model, combination and configuration can be carried out according to different test requirements, and the test flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, in particular to a load simulation tool used for testing a main control panel of a refrigerator. Background Art

[0002] The main control board of the refrigerator is an electronic device responsible for controlling and managing various functions in the refrigerator. It is usually a system-on-chip with a single-chip microcomputer as the core. The main control board can detect the temperature and humidity inside the refrigerator, and maintain the temperature and humidity inside the refrigerator within the set range by adjusting the cooling. The main control board is connected to the display screen and buttons. Users can set the temperature, mode and other parameters of the refrigerator through buttons, and view the status and alarm information of the refrigerator through the display screen. The main control board can also be connected to other devices such as smartphones or smart home systems through wireless or wired methods to achieve remote control and monitoring of the refrigerator status.

[0003] During the development of refrigerators, the main control board needs to be tested to determine whether it can meet the performance and functional requirements of the refrigerator. However, the main control board is a complex electronic device that needs to interact with many circuits and components and needs to ensure that it can work properly in various environments and working conditions. In particular, different refrigerator models may have different main control boards and circuit designs. Most of the existing test tools are special test tools with different levels of standardization, making it difficult to ensure the comparability and repeatability of the test results. Summary of the invention

[0004] In view of the above problems, the present application designs and provides a load test simulation tooling for refrigerators, which is used to standardize the test environment of the refrigerator main control board so that the results of the main control board test have good comparability and repeatability.

[0005] A load simulation tool for testing a refrigerator main control board comprises: a shell, in which is arranged: a load simulation module, which comprises a plurality of simulation units; the plurality of simulation units are respectively electrically connected to corresponding simulation unit plug-in interfaces, the simulation unit plug-in interfaces extend outward from the shell and are operably connected to the main control board under test; and a power supply module, one path of which is electrically connected to the power supply interface, and the other path of which is electrically connected to the corresponding power supply module plug-in interface; the power supply interface is operably connected to a mains power supply, and the power supply module plug-in interface extends outward from the shell and is operably connected to the main control board under test.

[0006] Furthermore, the shell includes: a panel; the load simulation module includes: a plurality of sensor simulation units, any of the sensor simulation units includes a sliding rheostat and a sensor simulation switch; the sliding rheostat includes a knob and a resistive element, wherein the resistive element is connected in series with the sensor simulation switch and electrically connected to the corresponding simulation unit plug-in interface, and the knob and the sensor simulation switch are arranged on the panel.

[0007] Furthermore, the sensor simulation unit further includes: a resistor, wherein the resistor, the resistive element and the sensor simulation switch are connected in series and electrically connected to the corresponding simulation unit plug-in interface.

[0008] Furthermore, the load simulation module includes: a plurality of damper simulation units, any of the damper simulation units includes a plurality of groups of light-emitting diodes and resistors, the positive pole of the light-emitting diode is electrically connected to the resistor, and the negative pole is electrically connected to the corresponding simulation unit plug-in interface; the light-emitting diode is arranged on the panel.

[0009] Furthermore, the load simulation module includes: a plurality of heating simulation units, any of which includes a light-emitting diode and a resistor, the positive pole of the light-emitting diode is electrically connected to the resistor, and the negative pole is electrically connected to the corresponding simulation unit plug-in interface; the light-emitting diode is arranged on the panel.

[0010] Furthermore, the load simulation module includes: a plurality of fan simulation units, any of which includes a fan, and the fan is electrically connected to a corresponding simulation unit plug-in interface.

[0011] Furthermore, the load simulation module includes: a number of high-electricity load simulation units, any of which includes a high-electricity load, one of which is connected to the power interface and the other is electrically connected to the corresponding simulation unit plug-in interface, and a power switch is provided between the high-electricity load and the power interface.

[0012] Furthermore, the high-voltage load is an incandescent lamp, and the high-voltage load is disposed on the panel.

[0013] Furthermore, the load simulation module includes: a plurality of key switch simulation units, any of which includes a key switch body and a display component, and the key switch body and the display component are electrically connected to the corresponding simulation unit plug-in interface respectively; the display component includes a light-emitting diode and a resistor, and the light-emitting diode and the key switch body are arranged on the panel.

[0014] Furthermore, the power interface is arranged on the panel.

[0015] The load simulation tooling provided in the present application adopts a modular design. Each simulation unit has its own functions and interfaces, which is easy to maintain and upgrade. It can simulate different load scenarios and improve the coverage and accuracy of the test. The simulation unit plug-in interface and the power supply module plug-in interface both extend outward from the shell and are operably connected to the main control board under test, which is convenient for use and debugging. The power supply interface can be operably connected to the AC power supply to ensure the stability and reliability of the test. The load simulation tooling can be combined and configured according to different test requirements, thereby improving the flexibility of the test.

[0016] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a load simulation tool for testing a refrigerator main control panel provided by the utility model;

[0019] Figure 2 It is a structural schematic diagram of a load simulation tooling for testing a refrigerator main control panel provided by the utility model;

[0020] Figure 3 It is a structural schematic diagram of a load simulation tooling for testing a refrigerator main control panel provided by the utility model;

[0021] Figure 4 It is a structural schematic diagram of a load simulation tooling for testing a refrigerator main control panel provided by the utility model;

[0022] Figure 5 It is a structural schematic diagram of a load simulation tooling for testing a refrigerator main control panel provided by the utility model;

[0023] Figure 6 It is a structural schematic diagram of a load simulation tooling for testing a refrigerator main control panel provided by the utility model;

[0024] Figure 7 It is a structural schematic diagram of a load simulation tooling for testing a refrigerator main control panel provided by the utility model;

[0025] Figure 8 It is a schematic block diagram of the connection structure of the load simulation tooling for testing the refrigerator main control panel provided by the utility model;

[0026] Fig. 9 It is a circuit diagram of a load simulation tool for testing a refrigerator main control panel provided by the utility model;

[0027] Fig.10 It is a circuit diagram of a load simulation tool for testing a refrigerator main control panel provided by the utility model;

[0028] Fig.11 It is a circuit diagram of a load simulation tool for testing a refrigerator main control panel provided by the utility model;

[0029] Fig.12 It is a circuit diagram of a load simulation tool for testing a refrigerator main control panel provided by the utility model;

[0030] Fig.13 It is a circuit diagram of a load simulation tool for testing a refrigerator main control panel provided by the utility model;

[0031] In the figure: 10, load simulation tooling; 100, housing; 101, load simulation module; 102, power supply module; 104, panel; 105, sensor simulation unit; 106, knob; 108, temperature sensor simulation unit; 109, temperature sensor simulation sliding rheostat; 110, temperature sensor simulation switch; 111, humidity sensor simulation unit; 112, humidity sensor simulation sliding rheostat; 113, humidity sensor simulation resistor; 114, humidity sensor simulation switch; 115, first simulation unit plug-in interface; 116, wiring hole; 117, first damper simulation unit; 118, second damper simulation Simulation unit; 119, first electric heating simulation unit; 120, second electric heating simulation unit; 121, second simulation unit plug-in interface; 122, first fan simulation unit; 123, second fan simulation unit; 124, third simulation unit plug-in interface; 125, strong electric load simulation unit; 126, strong electric load; 127, fourth simulation unit plug-in interface; 128, key switch simulation unit; 129, key switch body; 130, display component; 131, display component light emitting diode; 132, fifth simulation unit plug-in interface; 133, power switch; 134, power interface; 135, power supply module plug-in interface

[0032] 20. Adapter board; 30. Main control board under test. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "electrically connected" should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the implementation method, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0036] 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.

[0037] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0038] like Figures 1 to 7As shown, the present application designs and provides a load simulation tool 10 for testing a refrigerator main control board. The load simulation tool 10 includes a shell 100, in which a load simulation module 101 and a power supply module 102 are arranged. The load simulation module 101 includes a plurality of simulation units, and the plurality of simulation units are electrically connected to corresponding simulation unit plug-in interfaces, respectively, and the simulation unit plug-in interfaces extend outward from the shell 100 and are operably connected to the main control board 30 under test. One path of the power supply module 102 is electrically connected to the power supply interface 134, and the other path is electrically connected to the corresponding power supply module plug-in interface 135. The power supply interface 134 is operably connected to a mains power supply, and the power supply module plug-in interface 135 extends outward from the shell 100 and is operably connected to the main control board 30 under test.

[0039] The load simulation tooling 10 provided in the present application adopts a modular design. Each simulation unit has its own functions and interfaces, which is easy to maintain and upgrade. It can simulate different load scenarios and improve the coverage and accuracy of the test. The simulation unit plug-in interface and the power supply module plug-in interface 135 both extend outward from the shell 100 and are operably connected to the main control board 30 under test, which is convenient for use and debugging. The power supply interface 134 is operably connected to the AC power supply to ensure the stability and reliability of the test. The load simulation tooling 10 can be combined and configured according to different test requirements, thereby improving the flexibility of the test.

[0040] As shown in the figure, the housing 100 includes a panel 104. In multiple embodiments of the present application, the load simulation module 101 includes multiple sensor simulation units 105, each of which includes a sliding rheostat and a sensor simulation switch; wherein the sliding rheostat includes a knob 106 and a resistive element. The resistive element is connected in series with the sensor simulation switch and is electrically connected to the corresponding simulation unit plug-in interface, and the knob 106 and the sensor simulation switch are arranged on the panel 104.

[0041] In the temperature detection of refrigerators, temperature sensors are usually used to detect temperature, such as temperature sensitive resistors (NTCs). The resistance value of NTCs changes with temperature, so the temperature can be indirectly detected by detecting its resistance value (converted into voltage or current). The voltage or current signal representing the temperature collected by the temperature sensor is further transmitted to the main control board for parameter detection. Communication protocols such as I2C, SPI or UART can be used between the temperature sensor and the main control board.

[0042] In the present application, the change of the NTC resistance value is simulated by the variable resistance of the sliding rheostat. For example, the resistance value of the resistive element can be manually controlled by the knob 106 to simulate different temperature signals.

[0043] A refrigerator is usually provided with different compartments, such as a freezer, a refrigerator, a temperature-changing chamber, etc. Therefore, the corresponding settings are as follows: Fig. 9 The multi-channel temperature sensor simulation unit 108 shown is used to simulate the temperature change of different compartments. Each temperature sensor simulation unit 108 includes a temperature sensor simulation sliding rheostat 109 and a temperature sensor simulation switch 110, as shown in the figure. After the temperature sensor simulation switch 110 is closed, the resistance value of the resistive element of the corresponding sliding rheostat can be adjusted by the knob 106, thereby simulating the change of the NTC resistance value, and testing whether the main control board 30 under test can stably obtain the readings of each temperature sensor.

[0044] In some embodiments of the present application, one or more sensors further include a resistor. The resistor, the resistive element and the sensor simulation switch are connected in series and electrically connected to the corresponding simulation unit plug-in interface, thereby simulating the detection process of the humidity sensor.

[0045] Inside the refrigerator, especially in humidity-sensitive food storage areas such as vegetables and fruits, excessive humidity may cause mold growth and odor. By monitoring the humidity in the refrigerator compartment, you can ensure that the appropriate humidity level is maintained, thereby preventing food from spoiling and mold, and avoiding food from becoming soft or ice crystals. Resistive humidity sensors use a special polymer, such as a designed coating. The resistance of these materials changes with changes in humidity, so humidity can be detected by detecting its resistance value (converted into voltage or current). The voltage or current signal representing the humidity collected by the humidity sensor is further transmitted to the main control board for parameter detection. Communication protocols such as I2C, SPI or UART can be used between the humidity sensor and the main control board.

[0046] Therefore, the humidity sensor simulation unit 105 simulates the detection process of the humidity sensor by connecting the humidity sensor simulation sliding rheostat 112 and the humidity sensor simulation resistor 113 in series. After the humidity sensor simulation switch 114 is closed, in the humidity sensor simulation unit 105, the movement of the sliding end (driven by the knob 106) of the humidity sensor simulation sliding rheostat 112 can represent the change of resistance when the humidity changes. The action of the knob 106 of the humidity sensor simulation sliding rheostat 112 will change the resistance value of the resistive element, and further change the total resistance value in the circuit, which is similar to the principle that the resistance value changes with the humidity in the humidity sensor. The series connection of the humidity sensor simulation sliding rheostat 112 and the humidity sensor simulation resistor 113 can adapt to a wider range of humidity changes. When the internal structure and material of the humidity sensor simulation sliding rheostat 112 cause a certain degree of drift or instability due to the use time, the humidity sensor simulation resistor 113 can stabilize the total resistance value of the circuit and reduce the sensitivity to the change of the characteristics of the humidity sensor simulation sliding rheostat 112 itself. By connecting the humidity sensor simulation resistor 113 and the humidity sensor simulation sliding rheostat 112 in series, easier humidity simulation adjustment and calibration can be achieved. Adjusting the position of the humidity sensor simulation sliding resistor can fine-tune the humidity simulation, while the humidity sensor simulation resistor 113 can serve as a reference or limit to ensure that the simulated humidity range and accuracy meet the requirements.

[0047] In some embodiments of the present application, five groups of temperature sensor simulation units 108 and one group of humidity sensor simulation units 105 are electrically connected to the first simulation unit plug interface 115. The first simulation unit plug interface 115 extends outward from the wiring hole 116 on the housing 100 and is operably connected to the main control board 30 to be tested. For example, the main control board 30 to be tested is connected through the adapter board 20 or the plug interface, such as Figure 8 shown.

[0048] In some embodiments of the present application, the load simulation module 101 includes a plurality of damper simulation units. Each damper simulation unit includes a plurality of light-emitting diodes and resistors. The positive electrode of each light-emitting diode is connected to the resistor, and the negative electrode is electrically connected to the corresponding simulation unit plug-in interface. The light-emitting diode is arranged on the panel 104.

[0049] The damper (also called air valve) in the refrigerator refers to the control device for the air flow inside the refrigerator, which is used to adjust the temperature and humidity of different areas in the refrigerator to maintain the freshness and refrigeration effect of food. The damper can achieve air exchange and circulation between different areas by controlling the flow direction and speed of air. The dampers in the refrigerator can include refrigerator dampers and freezer dampers. The refrigerator damper controls the air flow in the refrigerator. It can adjust the temperature and humidity in the refrigerator to ensure that the food is preserved in a suitable environment. The refrigerator damper is connected to the cooling system so that the cold air flows evenly to different areas in the refrigerator. Similarly, the freezer damper is used to control the air flow inside the freezer. It can adjust the temperature and humidity of the freezer to ensure that the food maintains good quality in a frozen state. The freezer damper is usually connected to the freezing system so that the cold air flows evenly to every corner of the freezer.

[0050] By combining multiple sets of LEDs and resistors, the open and closed states of the damper can be simulated. Resistors can be used to limit the current of the LEDs and protect them from overcurrent damage. Choosing a resistor with a suitable resistance value (such as 2K) can ensure that the LEDs receive the appropriate current to emit light.

[0051] In some embodiments of the present application, a first damper simulation unit 117 is designed corresponding to the damper of the refrigerator compartment, and the first damper simulation unit 117 includes a corresponding combination of a plurality of light-emitting diodes and a resistance value. A second damper simulation unit 118 is designed corresponding to the damper of the freezer compartment, and the second damper simulation unit 118 includes a corresponding combination of a plurality of light-emitting diodes and a resistance value.

[0052] like Fig.10 As shown, illustratively, the first damper simulation unit 117 and the second damper simulation unit 118 can be provided with four groups of light-emitting diodes and resistors. For example, A+ indicates that the damper is rotating in the forward direction of opening, i.e., one light-emitting diode indicates the state of the damper moving in the forward direction of opening; A- indicates that the damper is reversing in the direction of opening, i.e., one light-emitting diode indicates the state of the damper moving in the reverse direction of opening; for example, the damper is already opened, but needs to be adjusted to a smaller opening angle; B+ indicates that the damper is rotating in the forward direction of closing, i.e., one light-emitting diode indicates the state of the damper moving in the forward direction of closing; B- indicates that the damper is reversing in the direction of closing, i.e., one light-emitting diode indicates the state of the damper moving in the reverse direction of closing; for example, the damper is already partially closed, but needs to be adjusted to a larger angle, or needs to be opened quickly.

[0053] In some embodiments of the present application, lighting up the A+ LED and turning off the A- LED can be used to indicate that the damper moves in the opening direction; lighting up the B+ LED and turning off the B- LED can be used to indicate that the damper moves in the closing direction; fully turning off the A+ LED, A- LED, B+ LED and B- LED can be used to indicate that the damper is completely closed.

[0054] The refrigerator may also be equipped with a multifunctional damper, which can adjust the air flow between the refrigerator and the freezer as needed, or adjust the temperature and humidity of different areas. In some embodiments of the present application, a plurality of sets of light-emitting diodes and combinations of resistor values ​​corresponding to the multifunctional dampers can also be designed.

[0055] In some embodiments of the present application, a corresponding combination of a plurality of light emitting diodes and a resistance value is designed corresponding to the multifunctional damper.

[0056] In some embodiments of the present application, the load simulation module 101 includes a plurality of heating simulation units. Each heating simulation unit includes a light emitting diode and a resistor. The positive electrode of the light emitting diode is electrically connected to the resistor, and the negative electrode is connected to the corresponding simulation unit plug-in interface. The light emitting diode is arranged on the panel 104.

[0057] The heater in the refrigerator is used to prevent frost or freezing inside the refrigerator and keep the temperature of the refrigerator or freezer stable. Frosting will affect the refrigeration efficiency and reduce the temperature control ability of the refrigerator or freezer. The heating simulation unit can indicate the working state of the heater. When the corresponding simulation unit plug-in interface receives the working drive signal output from the tested main control board, the light-emitting diode on the corresponding branch will light up, indicating that the heater is in the working state; when the corresponding simulation unit plug-in interface receives the stop working drive signal output from the tested main control board, the light-emitting diode on the corresponding branch will go out, indicating that the heater is in the off state.

[0058] In some embodiments of the present application, the first electric heating simulation unit 119 is designed for the refrigerating chamber, and the second electric heating simulation unit 120 is designed for the freezing chamber.

[0059] In some embodiments of the present application, the first damper simulation unit 117, the second damper simulation unit 118, the first electric heating simulation unit 119, and the second electric heating simulation unit 120 are electrically connected to the second simulation unit plug interface 121, respectively, and the second simulation unit plug interface 121 extends outward from the housing 100 and is operably connected to the main control board 30 under test. For example, the main control board 30 under test is connected through the adapter board 20 or the plug interface.

[0060] In some embodiments of the present application, the load simulation module 101 further includes a plurality of fan simulation units. Each fan simulation unit includes a fan, and the fan is electrically connected to the corresponding simulation unit plug-in interface.

[0061] like Fig.11 As shown, in some embodiments of the present application, a first fan simulation unit 122 is designed for a refrigerating chamber, and a second fan simulation unit 123 is designed for a freezing chamber. Exemplarily, the fan in the first fan simulation unit 122 is electrically connected to the third simulation unit plug interface 124 through a feedback cable, a ground cable, and a power cable; the fan in the second fan simulation unit 123 is electrically connected to the third simulation unit plug interface 124 through a feedback cable, a ground cable, and a power cable. The third simulation unit plug interface 124 extends outward from the housing 100 and is operably connected to the main control board 30 under test. For example, the main control board 30 under test is connected through an adapter board 20 or a plug interface.

[0062] like Fig.13 As shown, in some embodiments of the present application, the load simulation module 101 also includes a plurality of strong electric load simulation units 125. Each strong electric load simulation unit 125 includes a strong electric load 126, and the strong electric load 126 is connected to the power interface 134 in one way, and is electrically connected to the corresponding simulation unit plug interface in another way, such as the fourth simulation unit plug interface 127. The fourth simulation unit plug interface 127 extends outward from the housing 100 and is operably connected to the tested control mainboard, for example, through the adapter plate 20 or the plug interface to connect the tested main control board 30. A power switch 133 is provided between the strong electric load 126 and the power interface 134. In some embodiments of the present application, the strong electric load 126 is an incandescent lamp, and the strong electric load 126 is provided on the panel 104. When the tested main control board 30 can normally drive the strong electric load 126 to light up, it proves that the driving function of the strong electric load 126 of the tested main control board 30 is normal.

[0063] like Fig.12 As shown, in some embodiments of the present application, the load simulation module 101 also includes a plurality of key switch simulation units 128. Each key switch simulation unit 128 includes a key switch body 129 and a display component 130. The key switch body 129 and the display component 130 are electrically connected to the corresponding simulation unit plug-in interface, respectively. For example, it is electrically connected to the fifth simulation unit plug-in interface 132. The fifth simulation unit plug-in interface 132 extends outward from the housing 100 and is operably connected to the control motherboard under test. The display component 130 includes a display component light emitting diode 131 and a display component 130 resistor. The display component light emitting diode 131 and the key switch body 129 are arranged on the panel 104.

[0064] The power interface 134 is provided on the panel 104. The power interface 134 is connected to the mains power supply. In the conductive state, the load simulation tool 10 can supply power to the strong electric load 126 and the main control board 30 under test.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. Load simulation tooling for testing refrigerator main control panel, characterized in that: include: A housing is provided with: A load simulation module, comprising a plurality of simulation units; the plurality of simulation units are electrically connected to corresponding simulation unit plug interfaces, the simulation unit plug interfaces extend outward from the housing and are operably connected to a main control board to be tested; and A power supply module, one of which is electrically connected to the power interface, and the other is electrically connected to the corresponding power supply module plug-in interface; the power interface is operably connected to the main power supply, and the power supply module plug-in interface extends outward from the shell and is operably connected to the main control board under test.

2. The load simulation tool for testing a refrigerator main control panel according to claim 1, characterized in that: The housing comprises: panel; The load simulation module comprises: A plurality of sensor simulation units, any of which comprises a sliding rheostat and a sensor simulation switch; the sliding rheostat comprises a knob and a resistive element, wherein the resistive element is connected in series with the sensor simulation switch and is electrically connected to a corresponding simulation unit plug-in interface, and the knob and the sensor simulation switch are arranged on the panel.

3. The load simulation tool for testing the refrigerator main control panel according to claim 2, characterized in that: The sensor simulation unit also includes: A resistor, the resistor, the resistive element and the sensor analog switch are connected in series and electrically connected to a corresponding analog unit plug-in interface.

4. The load simulation tool for testing a refrigerator main control panel according to claim 2, characterized in that: The load simulation module comprises: A plurality of damper simulation units, any of which comprises a plurality of light emitting diodes and resistors, wherein the positive pole of the light emitting diode is electrically connected to the resistor, and the negative pole is electrically connected to the corresponding simulation unit plug-in interface; the light emitting diode is arranged on the panel.

5. The load simulation tool for testing the refrigerator main control panel according to claim 2, characterized in that: The load simulation module comprises: A plurality of heating simulation units, any of which comprises a light emitting diode and a resistor, wherein the positive pole of the light emitting diode is electrically connected to the resistor, and the negative pole is electrically connected to the corresponding simulation unit plug-in interface; the light emitting diode is arranged on the panel.

6. The load simulation tool for testing the refrigerator main control panel according to claim 2, characterized in that: The load simulation module comprises: A plurality of fan simulation units, any of which comprises a fan, and the fan is electrically connected to a corresponding simulation unit plug-in interface.

7. The load simulation tool for testing a refrigerator main control panel according to claim 2, characterized in that: The load simulation module comprises: Several high-current load simulation units, any of which includes a high-current load, one of which is connected to the power interface and the other is electrically connected to the corresponding simulation unit plug-in interface, and a power switch is provided between the high-current load and the power interface.

8. The load simulation tool for testing the refrigerator main control panel according to claim 7, characterized in that: The high-voltage load is an incandescent lamp, and the high-voltage load is arranged on the panel.

9. The load simulation tool for testing a refrigerator main control panel according to claim 2, characterized in that: The load simulation module comprises: A plurality of key switch simulation units, any of which comprises a key switch body and a display component, wherein the key switch body and the display component are electrically connected to corresponding simulation unit plug-in interfaces respectively; the display component comprises a light-emitting diode and a resistor, wherein the light-emitting diode and the key switch body are arranged on the panel.

10. The load simulation tool for testing a refrigerator main control panel according to claim 2, characterized in that: The power interface is arranged on the panel.

Images