Multifunctional mini washing machine control system

Abstract

The utility model provides a multifunctional mini washing machine control system, which is applied to the technical field of washing machine control and comprises a power panel, the power panel comprises a control panel MCU, a power conversion module, an alternating current load control module and a direct current load control module, and the alternating current load control module is connected with an alternating current load to control on-off of the alternating current load. The direct-current load control module is connected with the direct-current load to control the on-off of the direct-current load; the control panel MCU is connected with the direct current motor, the direct current motor is powered by 24V direct current output by the power supply conversion module, the control panel MCU controls the direct current motor to drive through PWM signals, and the rotating speed of the direct current motor is adjustable within the range of 400-2500rpm. The 24V direct-current motor is used as a driving source of the washing machine, safety is improved, the rotating speed of the direct-current motor is adjusted through PWM signals, and the washing intensity of the washing machine can be adjusted according to different clothes.

Description

Technical Field

[0001] This utility model belongs to the field of washing machine control technology, specifically relating to a multi-functional mini washing machine control system. Background Technology

[0002] Mini washing machines are now widely used, primarily employing either AC motors or 310V DC motors. However, different fabric materials require varying washing strengths and intensities, which in turn dictates different motor speeds. AC motors, with their fixed speeds, cannot meet these demands. Furthermore, 310V DC motors power the motor with rectified and filtered 220V AC power, resulting in high-voltage, non-isolated AC power that can pose a safety hazard. Utility Model Content

[0003] In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide a multi-functional mini washing machine control system that uses a 24V DC motor as the driving source of the washing machine to improve safety, and uses PWM signal to adjust the speed of the DC motor so that it can adjust the washing intensity of the washing machine for different clothes.

[0004] A multifunctional mini washing machine control system includes a power board, which comprises a control board MCU, a power conversion module, an AC load control module, and a DC load control module. The AC load control module is connected to an AC load to control the on / off state of the AC load, and the DC load control module is connected to a DC load to control the on / off state of the DC load. The control board MCU is connected to a DC motor, which is powered by 24V DC power output from the power conversion module. The control board MCU controls the DC motor drive via a PWM signal, and the speed of the DC motor is adjustable within the range of 400-2500 rpm.

[0005] Preferably, the power conversion module includes an AC-DC conversion module, a DC-DC conversion module one, and a DC-DC conversion module two. The AC-DC conversion module is used to convert the 220V AC power output by the power supply into 24V DC power to power the DC load. The DC-DC conversion module one is used to convert the 24V DC power output by the AC-DC conversion module into 12V DC power to power the AC load control module. The DC-DC conversion module two is used to convert the 12V DC power output by the DC-DC conversion module one into 5V DC power to power the control board MCU.

[0006] Preferably, the control board MCU is communicatively connected to the display board. The display board includes a Logo light driver module and a Hall door opening signal detection module. The Logo light driver module is connected to the Logo light, and the Hall door opening signal detection module includes a Hall sensor.

[0007] Preferably, when the duty cycle of the PWM signal is 25%, the corresponding speed of the DC motor is 400 rpm; when the duty cycle of the PWM signal is 37%, the corresponding speed of the DC motor is 1000 rpm; and when the duty cycle of the PWM signal is 80%, the corresponding speed of the DC motor is 2500 rpm.

[0008] Preferably, the AC load includes a traction device, a water inlet valve, a drying component, and a water heating component. The AC load control module includes relays K2, K3, K4, and K5. Relay K5 is connected to the traction device, relay K4 is connected to the water inlet valve, relay K3 is connected to the drying component, and relay K2 is connected to the water heating component. Relays K2, K3, K4, and K5 are driven by drive signals output from the control board MCU to control the on / off state of the corresponding AC load.

[0009] Preferably, the DC load includes a fan, a drain pump, a peristaltic pump, and a UV lamp. The DC load control module uses transistors Q1, Q2, Q3, and Q4. Transistor Q1 is connected to the fan, transistor Q2 is connected to the drain pump, transistor Q3 is connected to the peristaltic pump, and transistor Q4 is connected to the UV lamp. Transistors Q1, Q2, Q3, and Q4 are driven by switching signals output from the control board MCU to control the on / off state of their respective DC loads.

[0010] Preferably, the power board also includes a water level detection module, a temperature and humidity detection module, a water temperature detection module, an inlet air detection module, an outlet air detection module, and a barrel-collision switch detection module connected to the control board MCU; wherein, the water level detection module includes a liquid level probe, the temperature and humidity detection module includes a temperature and humidity sensor, the water temperature detection module includes a water temperature NTC, the inlet air detection module includes an air inlet NTC, the outlet air detection module includes an outlet NTC, and the barrel-collision switch detection module includes a barrel-collision switch, wherein the NTC is a thermistor.

[0011] The beneficial effects of this invention are as follows: This multi-functional mini washing machine control system uses a 24V DC motor as the driving source for the washing machine. Using a safe, low-voltage DC motor not only reduces system costs but also improves safety. The speed of the DC motor is adjusted via a PWM signal output from the control board's MCU, allowing the washing intensity to be adjusted for different types of clothing.

[0012] The AC-DC conversion module, DC-DC conversion module one, and DC-DC conversion module two of the power conversion module convert 220V AC power into 24V DC power, 12V DC power, and 5V DC power in sequence, and then power the corresponding functional modules to keep the voltage in the entire control system in a low-voltage safe state. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a system block diagram of this utility model;

[0015] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation

[0016] Example 1

[0017] like Figure 1 As shown, a multifunctional mini washing machine control system includes a display board and a power board. The power board includes a control board (MCU), and the display board and the control board MCU are connected via UART communication. The control board MCU receives and processes sampled detection data, and then outputs corresponding control signals to drive and control various functional modules.

[0018] The display panel includes a logo light driver module and a hall door opening signal detection module, such as Figure 2 As shown, the Logo light driver module is connected to the Logo light, and the Hall door opening signal detection module includes a Hall sensor. The display board drives the Hall sensor to start and perform door opening detection through the Hall door opening signal detection module, and transmits the detection result to the control board MCU; the display board receives the control signal output by the control board MCU to drive the Logo light driver module to turn the Logo light on or off.

[0019] The power supply board includes a power conversion module, an AC load control module, and a DC load control module, all connected to the control board's MCU. The power conversion module comprises an AC-DC conversion module, a DC-DC conversion module one, and a DC-DC conversion module two. The AC-DC conversion module is connected to the power supply; DC-DC conversion module one is connected to the AC-DC conversion module; and DC-DC conversion module two is connected to DC-DC conversion module one.

[0020] The AC-DC conversion module converts the 220V AC power output to 24V DC power; DC-DC conversion module one converts the 24V DC power output from the AC-DC conversion module to 12V DC power; DC-DC conversion module two converts the 12V DC power output from DC-DC conversion module one to 5V DC power, and the 5V DC power is used to power the MCU on the control board.

[0021] The control board MCU is connected to the DC motor, which is powered by 24V DC power output from the AC-DC conversion module. The control board MCU controls the DC motor to rotate forward or backward, and controls the motor speed through PWM signals. The DC motor speed is adjustable within the range of 400-2500 rpm. Specifically, different duty cycles of the PWM signal correspond to different DC motor speeds: a 25% duty cycle corresponds to a DC motor speed of 400 rpm, a 37% duty cycle corresponds to a DC motor speed of 1000 rpm, and an 80% duty cycle corresponds to a DC motor speed of 2500 rpm.

[0022] In addition, the operating state of the washing machine is adjusted by adjusting the frequency of the PWM signal. When the frequency of the PWM signal is 4KHz, the washing machine is in the washing process, and when the frequency of the PWM signal is 8KHz, the washing machine is in the spin-drying process.

[0023] The AC load control module is connected to the AC load and powered by 12V DC output from the DC-DC converter module. The AC load includes a traction device, a water inlet valve, a drying assembly, and a water heating assembly. The AC load control module includes relays K2, K3, K4, and K5. Relay K5 is connected to the traction device, relay K4 is connected to the water inlet valve, relay K3 is connected to the drying assembly, and relay K2 is connected to the water heating assembly. Relays K2, K3, K4, and K5 are driven by drive signals output from the control board MCU to control the on / off state of their respective AC loads.

[0024] In this embodiment, relays K3, K4, and K5 are all 5A relays, and relay K2 is a 10A relay. The drying assembly includes a drying PTC, and the water heating assembly includes a water heating PTC, wherein the PTC is a thermistor.

[0025] The DC load control module is connected to the DC load, which includes a fan, drain pump, peristaltic pump, and UV lamp. All DC loads are powered by 24V DC output from the AC-DC conversion module.

[0026] The DC load control module uses transistors Q1, Q2, Q3, and Q4. Transistor Q1 is connected to the fan, Q2 to the drain pump, Q3 to the peristaltic pump, and Q4 to the UV lamp. Transistors Q1, Q2, Q3, and Q4 are driven by switching signals output from the MCU on the control board to control the on / off state of their respective DC loads.

[0027] like Figure 2As shown, the power board also includes a water level detection module, a temperature and humidity detection module, a water temperature detection module, an inlet air detection module, an outlet air detection module, and a barrel-collision switch detection module, all connected to the control board MCU.

[0028] The system includes a water level detection module (with a level probe), a temperature and humidity detection module (with a temperature and humidity sensor), a water temperature detection module (with a water temperature NTC), an inlet air detection module (with an inlet NTC), an outlet air detection module (with an outlet NTC), and a drum-collision switch detection module (with a drum-collision switch). The NTC is a thermistor.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-functional mini washing machine control system, characterized in that, It includes a power supply board and a DC motor. The power supply board includes a control board MCU, a power conversion module, an AC load control module, and a DC load control module. The AC load control module is connected to the AC load to control the on / off state of the AC load, and the DC load control module is connected to the DC load to control the on / off state of the DC load. The control board MCU is connected to the DC motor, which is powered by 24V DC power output from the power conversion module. The control board MCU controls the DC motor drive through PWM signals, and the speed of the DC motor is adjustable in the range of 400-2500rpm.

2. The multifunctional mini washing machine control system according to claim 1, characterized in that, The power conversion module includes an AC-DC conversion module, a DC-DC conversion module one, and a DC-DC conversion module two. The AC-DC conversion module converts the 220V AC power output to 24V DC power to supply power to the DC load. The DC-DC conversion module one converts the 24V DC power output from the AC-DC conversion module to 12V DC power to supply power to the AC load control module. The DC-DC conversion module two converts the 12V DC power output from the DC-DC conversion module one to 5V DC power to supply power to the control board MCU.

3. The multifunctional mini washing machine control system according to claim 1, characterized in that, The control board MCU is communicatively connected to the display board. The display board includes a Logo light driver module and a Hall door opening signal detection module. The Logo light driver module is connected to the Logo light, and the Hall door opening signal detection module includes a Hall sensor.

4. The multi-functional mini washing machine control system according to claim 1, characterized in that, When the duty cycle of the PWM signal is 25%, the corresponding speed of the DC motor is 400 rpm; when the duty cycle of the PWM signal is 37%, the corresponding speed of the DC motor is 1000 rpm; and when the duty cycle of the PWM signal is 80%, the corresponding speed of the DC motor is 2500 rpm.

5. The multifunctional mini washing machine control system according to claim 1, characterized in that, The AC load includes a traction device, a water inlet valve, a drying assembly, and a water heating assembly; the AC load control module includes relays K2, K3, K4, and K5. Relay K5 is connected to the traction device, relay K4 is connected to the water inlet valve, relay K3 is connected to the drying component, and relay K2 is connected to the water heating component. Relays K2, K3, K4, and K5 are driven by the drive signals output by the MCU on the control board to control the on / off state of the corresponding AC loads.

6. The multifunctional mini washing machine control system according to claim 1, characterized in that, The DC load includes a fan, a drain pump, a peristaltic pump, and a UV lamp; the DC load control module includes transistors Q1, Q2, Q3, and Q4. Transistor Q1 is connected to the fan, transistor Q2 is connected to the drain pump, transistor Q3 is connected to the peristaltic pump, and transistor Q4 is connected to the UV lamp. Transistors Q1, Q2, Q3, and Q4 are driven by the switching signals output by the MCU on the control board to control the on / off state of the corresponding DC loads.

7. The multi-functional mini washing machine control system according to any one of claims 1 to 6, characterized in that, The power board also includes a water level detection module, a temperature and humidity detection module, a water temperature detection module, an inlet air detection module, an outlet air detection module, and a barrel-collision switch detection module, all connected to the control board MCU. The water level detection module includes a liquid level probe, the temperature and humidity detection module includes a temperature and humidity sensor, the water temperature detection module includes a water temperature NTC, the inlet air detection module includes an air inlet NTC, the outlet air detection module includes an outlet NTC, and the barrel collision switch detection module includes a barrel collision switch, wherein the NTC is a thermistor.

Images