Test circuit of frequency conversion refrigerator

Abstract

The invention provides a test circuit of an inverter refrigerator. The inverter refrigerator comprises a compressor. The test circuit comprises a main transformer integrated board and an adapter board. The main transformer integrated plate is connected with the compressor. And the adapter plate is connected with the main transformer integrated plate. The adapter plate comprises a controller and a rotating speed input circuit which are electrically connected. The rotating speed input circuit is used for inputting electric signals representing compressor rotating speed to the controller. The controller is used for determining the rotating speed of the compressor according to the electric signal of the rotating speed input circuit and sending the rotating speed of the compressor to the main transformer integrated board. The main transformer integrated plate is used for controlling the compressor to work according to the rotating speed of the compressor. The compressor rotating speed is input through the rotating speed input circuit, the compressor rotating speed is determined through the controller, the compressor rotating speed is sent to the main transformer integrated plate through the adapter plate, then the main transformer integrated plate controls the compressor to work according to the compressor rotating speed, and therefore the frequency conversion function of the main transformer integrated plate is tested; the frequency conversion function test can be completed without directly controlling the frequency conversion module of the main transformer integrated board.

Description

Technical Field

[0001] This application relates to the field of variable frequency refrigerator technology, and in particular to a test circuit for a variable frequency refrigerator. Background Technology

[0002] With the continuous advancement of home appliance technology, inverter refrigerators have gradually become mainstream products in the market due to their advantages such as high efficiency, energy saving, and quiet operation. One of the core components of an inverter refrigerator is the compressor, whose performance directly affects the refrigerator's cooling effect and energy consumption. Therefore, testing the compressor and its inverter control system is particularly important to ensure the quality and performance of inverter refrigerators.

[0003] In traditional inverter refrigerators, the main control board and the inverter board are separate. During testing, testers can directly send control signals to the inverter module of the inverter control system and test the compressor's operating status under different conditions by setting different frequency parameters.

[0004] However, the above method cannot be used to test inverter refrigerators where the main control board and inverter board are integrated. Therefore, it is particularly important to develop a test circuit that can indirectly test the inverter function while avoiding direct operation of the inverter module. Summary of the Invention

[0005] This application provides a test circuit for a variable frequency refrigerator, which makes testing more convenient.

[0006] This application provides a test circuit for a variable frequency refrigerator, the variable frequency refrigerator including a compressor, and the test circuit includes:

[0007] The main transformer integrated board is connected to the compressor; and

[0008] An adapter board is connected to the main transformer integrated board; the adapter board includes an electrically connected controller and a speed input circuit; the speed input circuit is used to input an electrical signal representing the compressor speed to the controller; the controller is used to: determine the compressor speed according to the electrical signal of the speed input circuit, and send the compressor speed to the main transformer integrated board; the main transformer integrated board is used to: control the compressor to work according to the compressor speed.

[0009] Optionally, the speed input circuit includes a button; the controller is used to determine the compressor speed based on the number of times and duration the button is triggered.

[0010] Optionally, the buttons include an acceleration button and a deceleration button; the controller is used to adjust the compressor speed according to the number of times the acceleration button and the deceleration button are triggered.

[0011] Optionally, the button includes a shift button, and the controller is configured to: determine the digital digit of the compressor speed represented by the signal currently input by the acceleration button and / or the deceleration button based on the number of times the shift button is triggered.

[0012] Optionally, the buttons include function buttons, and the controller is configured to: if the function buttons are closed a preset number of times or for a preset duration, start receiving input signals from the acceleration button and the deceleration button.

[0013] Optionally, the test circuit includes an indicator light circuit, which is electrically connected to the controller. The controller is used to control the state of the indicator light circuit to change if the function button is closed a preset number of times or for a preset duration.

[0014] Optionally, the button includes a confirmation button, and the controller is configured to: if the confirmation button is closed once, send the current compressor speed to the main transformer integrated board.

[0015] Optionally, the test circuit includes a display circuit electrically connected to the controller, the controller being used to control the display circuit to display the compressor speed.

[0016] Optionally, the speed input circuit includes a signal generator for generating a PWM signal; the controller is used to determine the compressor speed based on the PWM signal.

[0017] Optionally, the integrated main transformer board includes a main control circuit and a frequency converter circuit electrically connected. The adapter board is electrically connected to the main control circuit, and the frequency converter circuit is electrically connected to the compressor. The main control circuit is used to send the compressor speed to the frequency converter circuit. The frequency converter circuit is used to control the compressor to work according to the compressor speed.

[0018] In some embodiments, the test circuit includes an integrated transformer board and an adapter board. The integrated transformer board is connected to the compressor. The adapter board is also connected to the integrated transformer board. The adapter board includes a controller and a speed input circuit that are electrically connected. The speed input circuit is used to input an electrical signal representing the compressor speed to the controller. The controller is used to: determine the compressor speed based on the electrical signal from the speed input circuit, and send the compressor speed to the integrated transformer board. The integrated transformer board is used to: control the compressor to operate based on the compressor speed, thereby testing the inverter function of the integrated transformer board. This allows for inverter function testing without directly controlling the inverter module of the integrated transformer board, making the testing more convenient.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 The diagram shown is a circuit block diagram of one embodiment of the variable frequency refrigerator of this application.

[0022] Figure 2 The diagram shown is a partial circuit diagram of one embodiment of the test circuit of this application.

[0023] Figure 3 The diagram shown is a circuit block diagram of one embodiment of the test circuit of this application.

[0024] Figure 4 The diagram shown is a partial circuit diagram of one embodiment of the test circuit of this application.

[0025] Figure 5 The diagram shown is a partial circuit diagram of one embodiment of the test circuit of this application.

[0026] Figure 6 The diagram shown is a partial circuit diagram of one embodiment of the test circuit of this application.

[0027] Figure 7 The diagram shown is a partial circuit diagram of one embodiment of the test circuit of this application. Detailed Implementation

[0028] This application provides a test circuit for a variable frequency refrigerator. The test circuit for the variable frequency refrigerator of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0029] Figure 1 The diagram shown is a circuit block diagram of one embodiment of the inverter refrigerator 10 of this application. Figure 1 As shown, the variable frequency refrigerator 10 includes a compressor 11 and the test circuit 20 of this application.

[0030] The test circuit 20 for the variable frequency refrigerator includes: a main transformer integrated board 21 and an adapter board 22.

[0031] The main transformer integrated board 21 is connected to the compressor 11. The main transformer integrated board 21 adjusts the operating frequency of the compressor 11 according to the received signals (such as the compressor speed).

[0032] The adapter board 22 is connected to the main transformer integrated board 21. The adapter board 22 includes a controller 23 and a speed input circuit 24, which are electrically connected. The speed input circuit 24 is used to input an electrical signal representing the compressor speed to the controller 23. The controller 23 is used to: determine the compressor speed according to the electrical signal from the speed input circuit 24, and send the compressor speed to the main transformer integrated board 21. The main transformer integrated board 21 is used to: control the compressor 11 to operate according to the compressor speed.

[0033] The speed input circuit 24 allows testers to manually input the speed or automatically generate the speed. The controller 23 is responsible for receiving and processing the electrical signal sent by the speed input circuit 24, extracting the compressor speed from the signal, and sending the compressor speed to the main transformer integrated board 21. The main transformer integrated board 21 controls the compressor 11 to work according to the compressor speed, thereby testing the frequency conversion function of the main transformer integrated board 21.

[0034] In this way, the compressor speed is sent from the adapter board 22 to the main transformer integrated board 21. The frequency conversion function test can be completed without directly controlling the frequency conversion module of the main transformer integrated board 21, making the test more convenient.

[0035] Figure 2 The diagram shown is a partial circuit diagram of one embodiment of the test circuit 20 of this application.

[0036] The main transformer integrated board 21 includes an electrical port 211, which is electrically connected to the controller 23. When testing is required, the adapter board 22 connects to the main transformer integrated board 21 through the electrical port 211 and sends signals to the main transformer integrated board 21. When testing is not required, the adapter board 22 disconnects from the electrical port 211, thus facilitating testing.

[0037] In some embodiments, the main transformer integrated board 21 includes a main control circuit and a frequency converter circuit electrically connected to each other. The adapter board 22 is electrically connected to the main control circuit, and the frequency converter circuit is electrically connected to the compressor 11. The frequency converter circuit is used to control the frequency conversion function of the compressor 11, and the main control circuit is used to control other functions.

[0038] The main control circuit is used to send the compressor speed to the frequency converter circuit. The frequency converter circuit is used to control the operation of compressor 11 based on the compressor speed. Thus, the compressor speed is provided by the adapter board, and the main control circuit does not need to generate the compressor speed. When testing the integrated main and variable circuit board 21, there is no need to control the main control circuit to generate a control signal. The compressor speed signal required by the frequency converter circuit is provided through the external adapter board 22. The adapter board 22 can select a suitable speed input circuit 24, making testing more convenient.

[0039] In some embodiments, the main control circuit is configured to: not send a signal to the inverter circuit if it does not receive a compressor speed reading, or if the received compressor speed reading is not within the compressor speed threshold range. This prevents the compressor 11 from operating under inappropriate conditions.

[0040] Figure 3 The diagram shown is a circuit block diagram of one embodiment of the test circuit 20 of this application.

[0041] The speed input circuit 24 includes a button 25. The controller 23 is used to determine the compressor speed based on the number of times and the duration of button 25 being triggered.

[0042] Button 25 can be triggered by the tester. Different numbers of times and durations of button 25 being triggered represent different compressor speeds. Button 25 allows the tester to easily and conveniently input the compressor speed; it is intuitive and easy to use.

[0043] Button 25 includes an acceleration button 251 and a deceleration button 252. Controller 23 is used to adjust the compressor speed according to the number of times the acceleration button 251 and the deceleration button 252 are triggered.

[0044] The acceleration button 251 and deceleration button 252 allow users to directly increase or decrease the compressor speed. For example, each time the acceleration button 251 is triggered, the compressor speed increases in a certain increment; correspondingly, each time the deceleration button 252 is triggered, the compressor speed decreases. In this way, users can quickly adjust the compressor speed according to actual needs.

[0045] Button 25 includes shift button 253. Controller 23 is used to: determine the digital bits representing the compressor speed indicated by the currently input signals of acceleration button 251 and / or deceleration button 252 based on the number of times shift button 253 is triggered.

[0046] The shift button 253 switches between different digits, allowing the user to adjust the compressor speed more precisely. For example, if the compressor speed is represented by multiple digits, the shift button 253 allows the user to select whether to adjust the units, tens, or higher digits. The controller 23 determines the specific digit representing the compressor speed based on the number of times the shift button 253 is triggered. For example, if the compressor speed consists of four digits, triggering the shift button 253 once inputs the units digit, and the controller 23 determines the units digit based on the number of times the acceleration button 251 and deceleration button 252 are triggered; triggering the shift button 253 twice inputs the tens digit, and the controller 23 determines the tens digit based on the number of times the acceleration button 251 and deceleration button 252 are triggered.

[0047] Button 25 includes function button 254. Controller 23 is configured to: receive input signals from acceleration button 251 and deceleration button 252 if function button 254 is closed a preset number of times or for a preset duration.

[0048] Function button 254 is used to start or activate the speed input mode. The controller 23 will only begin receiving input signals from the acceleration button 251 and deceleration button 252 after function button 254 has been closed a preset number of times or for a preset duration. This prevents accidental activation of button 25 when speed adjustment is not required, thereby improving the stability and safety of the test circuit 20.

[0049] Button 25 includes a confirmation button 255. Controller 23 is used to: if the confirmation button 255 is closed once, send the current compressor speed to the main transformer integrated board 21.

[0050] The confirmation button 255 is used to confirm that the user has completed the adjustment of the compressor speed and to send the current compressor speed to the main transformer integrated board 21. Once the confirmation button 255 is closed once, the controller 23 will send the current speed value to the main transformer integrated board 21 so that the main transformer integrated board 21 can run the compressor 11 at the speed set by the user.

[0051] Figure 4 The diagram shown is a partial circuit diagram of one embodiment of the test circuit 20 of this application.

[0052] Acceleration button 251, deceleration button 252, shift button 253, and function button 254 are each composed of a switch. When a switch is closed, the corresponding button is triggered. The switch can be a touch switch or a push switch. Acceleration button 251, deceleration button 252, shift button 253, and function button 254 are electrically connected to controller 23 through ports SW1, SW2, SW3, and SW4, respectively. Controller 23 receives the trigger signals of each button through the aforementioned ports.

[0053] Figure 5 The diagram shown is a partial circuit diagram of one embodiment of the test circuit 20 of this application.

[0054] refer to Figure 3 and Figure 5 The test circuit 20 includes an indicator light circuit 26. The indicator light circuit 26 is electrically connected to the controller 23. The controller 23 is used to control the state of the indicator light circuit 26 to change if the function button 254 is closed a preset number of times or for a preset duration.

[0055] The indicator light circuit 26 indicates whether the user can input the compressor speed through the speed input circuit 24. When the function button 254 is closed a preset number of times or for a preset duration, it can begin receiving the speed input from the speed input circuit 24, allowing the user to operate the speed input circuit 24. The controller 23 controls the state of the indicator light circuit 26 to change, thus reminding the user to start operating the speed input circuit 24. Conversely, when the controller 23 does not receive the signal from the speed input circuit 24, the state of the indicator light circuit 26 changes, reminding the user that the speed input circuit 24 cannot be operated at that time.

[0056] In some embodiments, the indicator circuit 26 includes an indicator light. If the function button 254 is closed for a preset number of times or for a preset duration, the indicator light is turned on. If the function button 254 is not closed for a preset number of times or for a preset duration, the indicator light is turned off.

[0057] exist Figure 5 In the illustrated embodiment, the indicator circuit 26 includes light-emitting diodes LED1 and LED2. LED1 and LED2 are electrically connected to the controller 23 via ports LED1 and LED2, respectively. If function button 254 is closed a preset number of times or for a preset duration, the controller 23 controls LED1 to light up and LED2 to turn off; if function button 254 is not closed a preset number of times or for a preset duration, the controller 23 controls LED1 to turn off and LED2 to light up.

[0058] Figure 6 The diagram shown is a partial circuit diagram of one embodiment of the test circuit 20 of this application.

[0059] refer to Figure 3 and Figure 6 The test circuit 20 includes a display circuit 27, which is electrically connected to the controller 23. The controller 23 is used to control the display circuit 27 to display the compressor speed.

[0060] exist Figure 6 In the illustrated embodiment, the display circuit 27 includes a digital tube. The controller 23 is connected to the digital tube via digit selection ports SEG1, SEG2, SEG3, and SEG4 and segment selection ports COM1, COM2, COM3, COM4, ​​COM5, COM6, COM7, and COM8, controlling the digital tube to display numbers. The controller 23 analyzes the compressor speed based on the electrical signal from the speed input circuit 24 and then controls the digital tube to display the compressor speed. Thus, when the user inputs the compressor speed using the speed input circuit 24, they can clearly see the currently input speed value, facilitating adjustment of the input speed.

[0061] Figure 7The diagram shown is a partial circuit diagram of one embodiment of the test circuit 20 of this application.

[0062] The speed input circuit 24 includes a signal generator 28 for generating a PWM signal. The controller 23 is used to determine the compressor speed based on the PWM signal.

[0063] The signal generator 28 can be a dedicated PWM control chip (such as SG3525), a PWM generator module integrated inside a microcontroller, a complex programmable logic device (CPLD), or a field programmable gate array device (FPGA), etc.

[0064] The controller 23 receives the PWM signal generated by the signal generator 28 and calculates the compressor speed based on parameters such as the duty cycle or frequency of the PWM signal.

[0065] Using a signal generator 28, the duty cycle and frequency of the PWM signal can be precisely controlled and responded to quickly, enabling rapid adjustment of the compressor speed and more accurate testing of the inverter function.

[0066] exist Figure 7 In the illustrated embodiment, the controller 23 is electrically connected to the signal generator 28 via a drive circuit. The drive circuit includes a transistor N1 connected between the signal generator 28 and the PWM port of the controller 23. The transistor N1 serves both a driving function and an isolation function.

Claims

1. A test circuit of a variable frequency refrigerator, characterized by, The inverter refrigerator includes a compressor, and the test circuit includes: The main transformer integrated board is connected to the compressor; and An adapter board is connected to the main transformer integrated board; the adapter board includes an electrically connected controller and a speed input circuit; the speed input circuit is used to input an electrical signal representing the compressor speed to the controller; the controller is used to: determine the compressor speed according to the electrical signal of the speed input circuit, and send the compressor speed to the main transformer integrated board; the main transformer integrated board is used to: control the compressor to work according to the compressor speed. 2.The test circuit of a variable frequency refrigerator according to claim 1, characterized in that, The speed input circuit includes a button; the controller is used to determine the compressor speed based on the number of times and duration the button is triggered. 3.The test circuit of a variable frequency refrigerator according to claim 2, characterized in that, The buttons include an acceleration button and a deceleration button; the controller is used to adjust the compressor speed according to the number of times the acceleration button and the deceleration button are triggered. 4.The test circuit of a variable frequency refrigerator according to claim 3, characterized in that, The button includes a shift button, and the controller is used to: determine the digital digit of the compressor speed represented by the signal currently input by the acceleration button and / or the deceleration button based on the number of times the shift button is triggered. 5.The test circuit of a variable frequency refrigerator according to claim 3, characterized in that, The buttons include function buttons, and the controller is configured to: if the function buttons are closed a preset number of times or for a preset duration, start receiving input signals from the acceleration button and the deceleration button. 6.The test circuit of a variable frequency refrigerator according to claim 5, characterized in that, The test circuit includes an indicator light circuit, which is electrically connected to the controller. The controller is used to control the state of the indicator light circuit to change if the function button is closed a preset number of times or for a preset duration. 7.The test circuit of a variable frequency refrigerator according to claim 2, characterized in that, The button includes a confirmation button, and the controller is used to: if the confirmation button is closed once, send the current compressor speed to the main transformer integrated board. 8.The test circuit of a variable frequency refrigerator according to claim 1, characterized in that, The test circuit includes a display circuit, which is electrically connected to the controller. The controller is used to control the display circuit to display the compressor speed. 9.The test circuit of a variable frequency refrigerator according to claim 1, characterized in that, The speed input circuit includes a signal generator for generating a PWM signal; the controller is used to determine the compressor speed based on the PWM signal. 10.The test circuit of a variable frequency refrigerator according to claim 1, characterized in that, The integrated main control board includes a main control circuit and a frequency converter circuit that are electrically connected. The adapter board is electrically connected to the main control circuit, and the frequency converter circuit is electrically connected to the compressor. The main control circuit is used to send the compressor speed to the frequency converter circuit. The frequency converter circuit is used to control the compressor to work according to the compressor speed.

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