CN211142543U - Washing machine circuit and washing machine - Google Patents
Washing machine circuit and washing machine Download PDFInfo
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- CN211142543U CN211142543U CN201921652048.5U CN201921652048U CN211142543U CN 211142543 U CN211142543 U CN 211142543U CN 201921652048 U CN201921652048 U CN 201921652048U CN 211142543 U CN211142543 U CN 211142543U
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Abstract
The embodiment of the application provides a washing machine circuit and a washing machine, and relates to the technical field of control circuits. The washing machine circuit comprises an isolation power circuit, a control chip and a payment detection circuit; the isolation power supply circuit is used for converting a non-isolation power supply end into a first isolation power supply end and a second isolation power supply end; the control chip is connected with the second isolation power supply end and used for controlling the operation of the washing machine; the payment detection circuit is respectively connected with the second isolation power supply end and the control chip and used for generating a starting signal when detecting a payment signal and sending the starting signal to the control chip so as to start the control chip to work. The washing machine circuit simultaneously supplies power to the control chip and the payment detection circuit by using the isolation power circuit, thereby realizing the technical effects of simplifying circuit design, improving circuit reliability and safety and reducing production cost.
Description
Technical Field
The application relates to the technical field of control circuits, in particular to a washing machine circuit and a washing machine.
Background
At present, in the field of household appliances, particularly in the field of washing machines, the current design situation of similar products is that silicon controlled rectifiers are used for controlling and driving loads (a water inlet valve, a drainage pump and a motor), and in order to drive the silicon controlled rectifiers, a non-isolated power supply is usually adopted for a computer board of the whole washing machine so as to obtain a uniform level and realize the driving of the silicon controlled rectifiers; the design has no electrical physical isolation between the input end and the load end, and weak current and strong current are connected together.
Therefore, for the coin-in/card-swiping/online payment washing machine, the coin-in, card-swiping or online payment circuit cannot adopt the non-isolated power supply of the computer board of the washing machine, otherwise, the potential risk of damaging the payment circuit or even using the payment circuit is existed, so that the completely independent isolated power supply is needed to be adopted. Therefore, the washing machine is provided with two sets of power supply systems, one set of power supply system supplies power to the washing machine computer board, and the other set of power supply system supplies power to the payment circuit, so that the circuit design is very complex, the failure rate is high, and the hardware production cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a washing machine circuit and washing machine, through using an isolation power supply circuit to supply power for control chip and payment detection circuit simultaneously to the realization simplifies circuit design, improves circuit reliability and security, and reduction in production cost's technological effect.
In a first aspect, an embodiment of the present application provides a washing machine circuit, including an isolated power circuit, a control chip, and a payment detection circuit; the isolation power supply circuit is used for converting a non-isolation power supply end into a first isolation power supply end and a second isolation power supply end; the control chip is connected with the second isolation power supply end and used for controlling the operation of the washing machine; the payment detection circuit is respectively connected with the second isolation power supply end and the control chip and used for generating a starting signal when detecting a payment signal and sending the starting signal to the control chip so as to start the control chip to work.
In the implementation process, the same isolated power supply circuit is adopted to simultaneously supply power to the control chip and the payment detection circuit of the washing machine; the isolation power supply circuit is provided with two output ports which are respectively a first isolation power supply end and a second isolation power supply end, can output direct current power supplies with different voltages, respectively supplies power for the control chip and the payment detection circuit, and simultaneously supplies power for the control chip and the payment detection circuit by using one isolation power supply circuit, so that the circuit design is simplified, the reliability and the safety of the circuit are improved, and the production cost is reduced.
Furthermore, the isolation power supply circuit comprises a filtering and rectifying sub-circuit and a switching power supply sub-circuit; the filtering and rectifying sub-circuit comprises a resistor, a first capacitor, a second capacitor and a first diode, wherein the first end of the resistor is connected with a live wire of the non-isolated power supply, and the second end of the resistor is connected with a zero line of the non-isolated power supply; the first end of the first capacitor is connected with the live wire of the non-isolated power supply, and the second end of the first capacitor is connected with the zero line of the non-isolated power supply; the anode of the first diode is connected, and the cathode of the first diode is connected with the first end of the second capacitor; the second end of the second capacitor is connected with a zero line of the non-isolated power supply; the switch power supply sub-circuit comprises a third capacitor, a second diode, a transformer and a switch chip, wherein one end of a primary coil of the transformer is connected with a live wire of the non-isolated power supply, the other end of the primary coil of the transformer is connected with the input end of the switch chip, one end of a secondary coil of the transformer is connected with an anode of the second diode, and the other end of the secondary coil of the transformer is grounded; one end of the switch chip is connected with the zero line of the non-isolated power supply, and the other end of the switch chip is grounded; the cathode of the second diode is grounded after passing through the third capacitor; the cathode of the second diode outputs the first isolation power supply terminal.
In the implementation process, the filtering and rectifying sub-circuit realizes rectification of the non-isolated power supply end, the transformer in the switching power supply sub-circuit realizes electrical isolation between the non-isolated power supply and the isolated power supply, and the output end of the switching power supply sub-circuit outputs the first isolated power supply end.
Furthermore, the switching power supply sub-circuit further comprises a transformer chip and a fourth capacitor, wherein the input end of the transformer chip is connected with the anode of the second diode, and the output end of the transformer chip is grounded through the fourth capacitor; and the output end of the voltage transformation chip outputs the second isolation power supply end.
In the implementation process, the voltage of the first isolation power supply end is changed through the transformer chip, so that the second isolation power supply end is output at the output end of the transformer chip.
Furthermore, the isolated power supply circuit further comprises a feedback sub-circuit, wherein the feedback sub-circuit comprises a first photoelectric coupler and a voltage stabilizing diode, one end of a light emitting source of the first photoelectric coupler is connected with an anode of the voltage stabilizing diode, the other end of the light emitting source of the first photoelectric coupler is grounded, one end of a light receiver of the first photoelectric coupler is connected with a feedback end of the switch chip, and the other end of the light receiver of the first photoelectric coupler is grounded; and the cathode of the voltage stabilizing diode is connected with the cathode of the second diode.
In the implementation process, the feedback sub-circuit is used for the output voltage feedback of the secondary coil of the transformer, and the working state of the isolation power supply circuit is stable by feeding back the output voltage.
Further, the washing machine circuit further comprises a detection circuit, the detection circuit comprising: the zero-crossing detection sub-circuit comprises a second photoelectric coupler, one end of a light emitting source of the second photoelectric coupler is connected with a live wire of the non-isolated power supply, the other end of the light emitting source of the second photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the second photoelectric coupler is connected with a zero-crossing detection end of the control chip, and the other end of the light receiver of the second photoelectric coupler is grounded; the normal water level detection sub-circuit comprises a first water level sensor and a third photoelectric coupler, wherein one end of a light emitting source of the third photoelectric coupler is connected with the first water level sensor, the other end of the light emitting source of the third photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the third photoelectric coupler is connected with a normal water level detection end of the control chip, and the other end of the light receiver of the third photoelectric coupler is grounded; the overhigh water level detection sub-circuit comprises a second water level sensor and a fourth photoelectric coupler, wherein one end of a light emitting source of the fourth photoelectric coupler is connected with the second water level sensor, the other end of the light emitting source of the fourth photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the fourth photoelectric coupler is connected with the overhigh water level detection end of the control chip, and the other end of the light receiver of the fourth photoelectric coupler is grounded; the door closing detection sub-circuit comprises a washing machine door closing sensor and a fifth photoelectric coupler, wherein one end of a light emitting source of the fifth photoelectric coupler is connected with the washing machine door closing sensor, the other end of the light emitting source of the fifth photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the fifth photoelectric coupler is connected with a door closing detection end of the control chip, and the other end of the light receiver is grounded.
In the implementation process, the zero-crossing detection sub-circuit, the normal water level detection sub-circuit, the over-high water level detection sub-circuit and the door closing detection sub-circuit are respectively used for implementing the zero-crossing detection, the normal water level detection, the over-high water level detection and the door closing detection of the washing machine.
Further, the washing machine circuit further comprises a control circuit, the control circuit comprising:
the switch gate control sub-circuit comprises a first relay, a first triode and a gate control motor, wherein the base electrode of the first triode is connected with the gate control signal end of the control chip, and the emitting electrode of the first triode is grounded; one end of a coil winding of the first relay is connected with the first isolation power supply end, and the other end of the coil winding of the first relay is connected with a collector electrode of the first triode; the output end of the first relay is connected with the live wire of the non-isolated power supply end after passing through the gate control motor, and the other end of the first relay is connected with the zero line of the non-isolated power supply end; the first water inlet valve control sub-circuit comprises a second relay, a second triode and a first water inlet motor, wherein the base electrode of the second triode is connected with the first water inlet valve signal end of the control chip, and the emitting electrode of the second triode is grounded; one end of a coil winding of the second relay is connected with the first isolation power supply end, and the other end of the coil winding of the second relay is connected with a collector electrode of the second triode; the output end of the second relay is connected with the live wire of the non-isolated power supply end after passing through the first water inlet valve motor, and the other end of the second relay is connected with the zero line of the non-isolated power supply; the second water inlet valve control sub-circuit comprises a third relay, a third triode and a second water inlet valve motor, wherein the base electrode of the third triode is connected with the signal end of the second water inlet valve of the control chip, and the emitting electrode of the third triode is grounded; one end of a coil winding of the third relay is connected with the first isolation power supply end, and the other end of the coil winding of the third relay is connected with a collector electrode of a third triode; the output end of the third relay is connected with the live wire of the non-isolated power supply end after passing through the second water inlet valve motor, and the other end of the third relay is connected with the zero line of the non-isolated power supply; the drain pump control sub-circuit comprises a fourth relay, a fourth triode and a drain pump motor, wherein the base electrode of the fourth triode is connected with the drain pump signal end of the control chip, and the emitting electrode of the fourth triode is grounded; one end of a coil winding of the fourth relay is connected with the first isolation power supply end, and the other end of the coil winding of the fourth relay is connected with a collector electrode of a fourth triode; the output end of the fourth relay is connected with the live wire of the non-isolated power supply end after passing through the gate control motor, and the other end of the fourth relay is connected with the zero line of the non-isolated power supply.
In the implementation process, the switch door control sub-circuit is used for controlling the switch of the washing machine door; the first water inlet valve control sub-circuit and the second water inlet valve control sub-circuit are respectively used for controlling the opening and closing of a first water inlet valve and a second water inlet valve of the washing machine, and two sets of water inlet valves are arranged to improve the use reliability of the washing machine; the drain pump control sub-circuit is used for controlling the on-off of the drain pump of the washing machine.
Furthermore, the washing machine circuit also comprises a motor circuit, and the motor circuit is connected with the control chip and used for adjusting the rotating speed and the rotating direction of the motor.
In the implementation process, the motor circuit is controlled by the control chip, and the rotating speed and the rotating direction of the motor of the washing machine can be adjusted.
Further, the motor circuit comprises a rotation speed control sub-circuit, the rotation speed control sub-circuit comprises a sixth photoelectric coupler and a silicon controlled rectifier, wherein one end of a light emitting source of the sixth photoelectric coupler is connected with the rotation speed control end of the control chip, the other end of the light emitting source of the sixth photoelectric coupler is grounded, one end of a light receiver of the sixth photoelectric coupler is connected with the silicon controlled rectifier, and the other end of the light receiver of the sixth photoelectric coupler is grounded; the controllable silicon is connected with the motor and used for adjusting the rotating speed of the motor according to the rotating speed control signal of the control chip.
In the implementation process, the sixth photoelectric coupler is used for realizing the electrical isolation between the control chip and the rotating speed control sub-circuit and realizing the control chip for controlling the rotating speed of the motor.
Furthermore, the motor circuit further comprises a steering control sub-circuit, the steering control sub-circuit comprises a fifth relay, a first input end of the fifth relay is connected with the first isolation power supply end, and a second input end of the fifth relay is connected with the steering control end of the control chip; and the output end of the fifth relay is connected with the motor.
In the implementation process, the electric appliance isolation of the control chip and the steering control sub-circuit is realized through the fifth relay, and the control chip is used for controlling the steering of the motor.
In a second aspect, embodiments of the present application provide a washing machine, including the washing machine circuit of the first aspect.
In the implementation process, the control chip and the payment detection circuit of the washing machine adopt the same isolated power supply circuit for power supply; in order to realize that the control chip can control other parts of the washing machine circuit and improve the use safety of the washing machine, the control chip adopts the photoelectric coupler and the relay to be connected with the detection circuit, the control circuit and the motor circuit of the washing machine, so as to realize electrical isolation, thereby realizing the technical effects of simplifying the circuit design, improving the reliability and the safety of the circuit and reducing the production cost.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a circuit of a washing machine according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of an isolated power circuit according to an embodiment of the present application;
fig. 3 is a circuit diagram of a feedback sub-circuit according to an embodiment of the present application;
fig. 4a is a circuit diagram of a zero-crossing detection sub-circuit provided in an embodiment of the present application;
FIG. 4b is a circuit diagram of a normal water level detection sub-circuit according to an embodiment of the present invention;
FIG. 4c is a circuit diagram of an excessive water level detecting sub-circuit according to an embodiment of the present application;
fig. 4d is a circuit diagram of a door closing detection sub-circuit according to an embodiment of the present application;
fig. 5a is a circuit diagram of a switch control sub-circuit according to an embodiment of the present application;
fig. 5b is a circuit diagram of a first inlet valve control sub-circuit according to an embodiment of the present disclosure;
fig. 5c is a circuit diagram of a second inlet valve control sub-circuit according to an embodiment of the present disclosure;
FIG. 5d is a circuit diagram of a switch control sub-circuit according to an embodiment of the present application;
fig. 6 is a circuit diagram of a motor circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The embodiment of the application provides a washing machine circuit and a washing machine, which can be suitable for a washing machine containing coin insertion, card swiping or online payment, and the technical effects of simplifying circuit design, improving circuit reliability and safety and reducing production cost are achieved by using an isolation power circuit to simultaneously supply power to a control chip and a payment detection circuit; in addition, the control chip is connected with detection signals of a door closing and water level and the like of the washing machine through the photoelectric coupler, and is connected with the motor, the water inlet and drainage door lock and the like through the photoelectric coupler and the relay, so that the control chip of the washing machine circuit is isolated from a strong current part, and the reliability and the safety of the circuit are further improved.
Referring to fig. 1, fig. 1 is a schematic diagram of a circuit of a washing machine according to an embodiment of the present disclosure. The washing machine circuit includes an isolated power circuit 10, a control chip 20 and a payment detection circuit 30.
Illustratively, the isolated power supply circuit 10 is used to convert a non-isolated power supply terminal into a first isolated power supply terminal and a second isolated power supply terminal.
The non-isolated power supply end is a wired alternating current, and optionally, the non-isolated power supply end is a commercial power 220V alternating current power supply end; the first isolation power supply terminal outputs direct current of a first voltage, and the second isolation power supply terminal outputs direct current of a second voltage. It should be understood that the first voltage and the second voltage may be the same or different, and are not limited herein; when the first voltage and the second voltage are the same, the second isolation power supply end can be optionally omitted, and the first isolation power supply end supplies power uniformly.
Illustratively, the control chip 20 is a main control chip of the washing machine, and is powered by the second isolated power source end of the isolated power source 10. The control chip 20 may be used to control the operation of the washing machine, and control the water inlet valve, the water outlet valve, etc. during washing, draining and dewatering, for example, the control chip 20 may issue various commands, and then control the electric appliance to perform the operation of the devices in the washing machine by using the electromagnet or the thyristor.
The control chip 20 may use various types of processors, such as WD-a12110D series, R5F212K series, sy-007 series, and the like. It should be understood that the type of the control chip is only exemplary and not limiting; when the corresponding requirements are met, the type of the control chip can adopt processors of other types.
Illustratively, the payment detection circuit 30 is respectively connected to the second isolated power source end of the isolated power source circuit 10 and the control chip 20, and is configured to generate an activation signal and send the activation signal to the control chip 20 to enable the control chip 20 to start operating when detecting the payment signal.
The payment detection circuit 30 is a coin-in, card-swiping or online payment circuit of the washing machine.
In a possible implementation scenario, when the payment detection circuit 30 detects a payment signal, it indicates that a customer has paid money, swiped a card, or paid online to the washing machine, and the washing machine has a usage requirement; therefore, the payment detection circuit 30 generates a start signal after detecting the payment signal, so as to start the operation of the control chip 20, thereby completing the process from payment to using the washing machine; when the use of the washing machine is completed, the control chip 20 is powered off, enters a standby state, and waits for a next start signal.
Illustratively, the isolated power circuit 10 is used to simultaneously power the control chip 20 and the payment detection circuit 30 of the washing machine, wherein the isolated power circuit 10 has two output ports: the first isolation power supply end and the second isolation power supply end can output direct current power supplies with different voltages to respectively supply power for the control chip and the payment detection circuit, and a power supply system can simultaneously supply power for the control chip and the payment detection circuit, so that the technical effects of simplifying circuit design, improving circuit reliability and safety and reducing production cost are achieved.
Referring to fig. 2, fig. 2 is a circuit diagram of an isolated power supply circuit according to an embodiment of the present disclosure. The isolated power supply circuit 10 includes a filtering and rectifying sub-circuit 11 and a switching power supply sub-circuit 12.
Illustratively L, N are the live and neutral wires, respectively, of the non-isolated power supply.
Illustratively, the filtering and rectifying sub-circuit 11 includes a resistor R1, a first capacitor C1, a second capacitor C2, and a first diode D1, wherein a first end of the resistor R1 is connected to the live wire L of the non-isolated power supply, a second end is connected to the neutral wire N of the non-isolated power supply, a first end of the first capacitor C1 is connected to the live wire L of the non-isolated power supply, and a second end is connected to the neutral wire N of the non-isolated power supply, an anode of the first diode D1 is connected, and a cathode is connected to a first end of the second capacitor C2, a second end of the second capacitor C2 is connected to the neutral wire N of the non-isolated power supply, wherein the first capacitor C1 is a common capacitor, the second capacitor C2 is a polar capacitor, and an anode of the second capacitor C2 is connected to a cathode of the first diode D1, wherein the resistor R1.
The working principle of the filter and rectifier sub-circuit 11 is as follows: the live wire and the zero wire of the non-isolated power supply end are alternating currents with sine waveforms, wherein the first capacitor C1 is a filter capacitor and filters high-frequency alternating current; the first diode D1 is a rectifier diode, which retains the AC in the forward direction and filters the AC in the reverse direction; the second capacitor C2 is a polar capacitor, and further rectifies the current passing through the first diode D1, so as to obtain a dc power with a smoother output.
Illustratively, the switching power supply sub-circuit 12 includes a third capacitor C3, a second diode D2, a transformer T, a switching chip TS, a first photocoupler OC1, a transforming chip BY and a fourth capacitor C4, wherein one end of a primary coil of the transformer T is connected to a live wire L of the non-isolated power supply, the other end is connected to an input terminal SW/D of the switching chip TS, one end of a secondary coil of the transformer is connected to an anode of the second diode D2, the other end is grounded, an S end of the switching chip TS is connected to a neutral wire of the non-isolated power supply, a GND end is grounded, a cathode of the second diode D2 is grounded through the third capacitor C3, an input end of the transforming chip BY is connected to an anode of the second diode D2, and an output end of the transforming chip is grounded through the fourth capacitor, wherein the third capacitor C3 and the fourth capacitor C4 are polar capacitors.
Illustratively, two ends of the light receiver of the first photocoupler OC1 are connected to the FB terminal and the GND terminal of the switch chip, and two ends of the light source are connected to two ends of the secondary coil of the transformer T for feeding back the secondary output voltage of the transformer T, so as to stabilize the output voltage of the transformer T.
Illustratively, the cathode of the second diode D2 outputs the first isolation power supply terminal V1, and the output terminal of the transformer chip BY outputs the second isolation power supply terminal V2.
Alternatively, the switch chip TS is a TinySwitch series chip.
The operating principle of the switching power supply sub-circuit 12 is as follows: the transformer T achieves electrical isolation of the non-isolated power supply terminal and the isolated power supply terminal, thereby separating the strong current and weak point portions. The primary coil of the transformer T is connected with a non-isolated power supply end, and the secondary coil is an isolated power supply end; the switch chip TS is used for controlling the voltage output of the transformer T to be constant output; the transformer chip BY can change the voltage of the direct current power supply.
Illustratively, the output voltage of the first isolated power supply terminal V1 is 12V, and the output voltage of the second isolated power supply terminal V2 is 5V.
Referring to fig. 3, fig. 3 is a schematic diagram of a feedback sub-circuit according to an embodiment of the present disclosure. It should be understood that this feedback sub-circuit corresponds to the isolated power supply circuit 10 in fig. 2, and is a further addition to the isolated power supply circuit 10.
Illustratively, the feedback sub-circuit includes a first opto-coupler OC1, a zener diode ZD, and a resistor R2. The feedback sub-circuit is connected as shown in the figure, wherein one end of a light emitting source of the first photoelectric coupler OC1 is connected with the anode of the zener diode ZD, the other end is grounded, one end of a light receiver of the first photoelectric coupler OC1 is connected with the feedback end of the switch chip TS, and the other end is grounded; the cathode of the zener diode ZD is connected to the cathode of the second diode D2.
Illustratively, the feedback sub-circuit is used for the output voltage feedback of the secondary coil of the transformer T to stabilize the output voltage of the transformer T.
The working principle of the feedback sub-circuit is as follows: the light emitting source port of the first photoelectric coupler OC1 collects the output voltage of the secondary coil of the transformer T, and after the electric-optical-electric conversion, the light receiver port of the first photoelectric coupler OC1 feeds back the output voltage of the secondary coil of the transformer T to the switch chip TS, thereby realizing the voltage feedback.
Referring to fig. 4a, fig. 4a is a circuit diagram of a zero-crossing detection sub-circuit according to an embodiment of the present disclosure.
Illustratively, the zero-crossing detection sub-circuit comprises a second photocoupler OC2, a resistor R3 and a third diode D3. the zero-crossing detection sub-circuit is connected as shown in the figure, wherein one end of a light emitting source of the second photocoupler is connected with a live wire L of a non-isolated power supply, the other end of the light emitting source is connected with a zero wire N of the non-isolated power supply, one end of a light receiver of the second photocoupler OC2 is connected with a zero-crossing detection end ZR of the control chip 20, and the other end of the light receiver is grounded.
The zero-crossing detection subcircuit is used for zero-crossing detection, which is exemplarily referred to detection made when a zero-crossing occurs when a current waveform transitions from a positive half cycle to a negative half cycle in a non-isolated power supply, i.e., in an alternating current system, so that the control chip 20 synchronously controls the washing machine motor.
The working principle of the zero-crossing detection sub-circuit is as follows: the second optocoupler OC2 is used for electrically isolating the non-isolated power supply from the control chip 20. Specifically, the resistor R3 plays a role in current limiting protection; when the switch of the zero-crossing detection sub-circuit is closed, the alternating current of the non-isolated power supply respectively flows through the second photoelectric coupler OC2 and the third diode D3 in the positive half cycle and the negative half cycle; when the ac power of the non-isolated power supply flows through the second photocoupler OC2, the ac power of the non-isolated power supply generates a zero-cross detection signal after photo-electro-optical conversion of the second photocoupler OC2, and transmits the zero-cross detection signal to the zero-cross detection terminal ZR of the control chip 20.
Referring to fig. 4b, fig. 4b is a circuit diagram of a normal water level detection sub-circuit according to an embodiment of the present disclosure.
Illustratively, the normal water level detection sub-circuit comprises a first water level sensor S1 and a third photo coupler OC3, and a resistor R4 and a fourth diode D4., wherein the normal water level detection sub-circuit is connected as shown in the figure, wherein one end of a light emitting source of the third photo coupler OC3 is connected with the first water level sensor S1, the other end is connected with a zero line N of a non-isolated power supply, one end of a light receiver of the third photo coupler OC3 is connected with a normal water level detection end NW L of the control chip 20, and the other end is grounded.
Illustratively, the normal water level detection sub-circuit is used for normal water level detection of a washing machine.
It should be understood that the working principle of the normal water level detection sub-circuit is the same as that of the zero-crossing detection sub-circuit in fig. 4a, and the description thereof is omitted.
Referring to fig. 4c, fig. 4c is a circuit diagram of an excessive water level detection sub-circuit according to an embodiment of the present disclosure.
Illustratively, the excess water level detection sub-circuit comprises a second water level sensor S2 and a fourth photo coupler OC4, a resistor R5 and a fifth diode D5., wherein the excess water level detection sub-circuit is connected as shown in the figure, wherein one end of a light emitting source of the fourth photo coupler OC4 is connected with the second water level sensor S2, the other end of the light emitting source is connected with a zero line N of a non-isolated power supply, one end of a light receiver of the fourth photo coupler OC4 is connected with an excess water level detection end OW L of the control chip 20, and the other end of the light receiver is grounded.
Illustratively, the excessive water level detection sub-circuit is used for excessive water level detection of a washing machine.
It should be understood that the operation principle of the over-high level detection sub-circuit is the same as that of the zero-crossing detection sub-circuit in fig. 4a, and the description thereof is omitted here.
Referring to fig. 4d, fig. 4d is a circuit diagram of a door closing detection sub-circuit according to an embodiment of the present disclosure.
Illustratively, the door closing detection sub-circuit includes a washing machine door closing sensor S3 and a fifth photo coupler OC5, as well as a resistor R6 and a sixth diode D6. The connection relationship of the DOOR closing detection sub-circuit is shown in the figure, wherein one end of the light emitting source of the fifth photoelectric coupler OC5 is connected with the DOOR closing sensor S3 of the washing machine, the other end is connected with the zero line N of the non-isolated power supply, one end of the light receiver of the fifth photoelectric coupler OC5 is connected with the DOOR closing detection end DOOR of the control chip 20, and the other end is grounded.
Illustratively, the door closing detection sub-circuit is used for door closing detection of a washing machine.
It should be understood that the operation principle of the door-closing detection sub-circuit is the same as that of the zero-crossing detection sub-circuit in fig. 4a, and the detailed description thereof is omitted here.
Referring to fig. 5a, fig. 5a is a circuit diagram of a switch gate control sub-circuit according to an embodiment of the present disclosure.
Illustratively, the switch gate control sub-circuit comprises a first relay J1, a first triode Tr1 and a gate control motor M1, the connection relationship of the switch gate control sub-circuit is shown in the figure, wherein the base electrode of the first triode Tr1 is connected with a gate control signal end Doorc of the control chip 20, the emitter electrode of the first triode Tr1 is grounded, one end of the coil winding of the first relay J1 is connected with a first isolation power supply end V1, the other end of the coil winding is connected with the collector electrode of the first triode Tr1, the output end of the first relay J1 is connected with a live wire L of a non-isolation power supply after passing through the gate control motor M1, and the other end.
Illustratively, the switch door control sub-circuit is used for switch control of a washing machine door.
The working principle of the switch gate control sub-circuit is as follows: when the gate control signal terminal DoorC is at a low level, the first transistor Tr1 is turned off, no current flows through the coil winding of the first relay J1, and the normally open contact does not operate, and the normally open state is maintained, so that the gate control motor M1 does not operate due to no energization. When the washing machine needs to open or close the door, the door control signal end Doorc is changed into high level, the first triode Tr1 is conducted, current passes through the coil winding of the first relay J1, the normally open contact is attracted, and the door control motor M1 starts to work.
Referring to fig. 5b, fig. 5b is a circuit diagram of a first inlet valve control sub-circuit according to an embodiment of the present disclosure.
Illustratively, the first inlet valve control sub-circuit comprises a second relay J2, a second triode Tr2 and a first inlet valve motor M2, the connection relation of the first inlet valve control sub-circuit is shown in the figure, wherein the base electrode of the second triode Tr2 is connected with a first inlet valve signal end VA L _1 of the control chip 20, the emitter electrode of the first inlet valve signal end VA L _1 is grounded, one end of the coil winding of the second relay J2 is connected with a first isolation power supply end V1, the other end of the coil winding of the second relay J2 is connected with the collector electrode of the second triode Tr2, the output end of the second relay J2 is connected with a live wire L of a non-isolation power supply after passing through the first inlet valve motor M2.
Illustratively, the first inlet valve control sub-circuit is used for on-off control of a first inlet valve of the washing machine.
It should be understood that the operation principle of the first inlet valve control sub-circuit is the same as that of the switch gate control sub-circuit in fig. 5a, and the detailed description thereof is omitted.
Referring to fig. 5c, fig. 5c is a circuit diagram of a second inlet valve control sub-circuit according to an embodiment of the present disclosure.
Illustratively, the second inlet valve control sub-circuit comprises a third relay J3, a third triode Tr3 and a second inlet valve motor M3, the connection relationship of the second inlet valve control sub-circuit is shown in the figure, wherein the base electrode of the third triode Tr3 is connected with a second inlet valve signal end VA L _2 of the control chip 20, the emitter electrode is grounded, one end of the coil winding of the third relay J3 is connected with a first isolation power supply end V1, the other end of the coil winding is connected with the collector electrode of the third triode Tr3, the output end of the third relay J3 is connected with a live wire L of the non-isolation power supply after passing through the second inlet valve motor M3, and the other end of the third relay J3 is connected with a zero line N.
Illustratively, the second inlet valve control sub-circuit is for on-off control of a second inlet valve of the washing machine.
It should be understood that the operation principle of the second inlet valve control sub-circuit is the same as that of the switch gate control sub-circuit in fig. 5a, and the detailed description thereof is omitted.
Referring to fig. 5d, fig. 5d is a circuit diagram of a drainage pump control sub-circuit according to an embodiment of the present disclosure.
Illustratively, the drain PUMP control sub-circuit comprises a fourth relay J4, a fourth triode Tr4 and a drain PUMP motor M4., wherein the drain PUMP control sub-circuit is connected as shown in the figure, wherein the base of the fourth triode Tr4 is connected with the drain PUMP signal end PUMP of the control chip 20, the emitter is grounded, one end of the coil winding of the fourth relay J4 is connected with a first isolated power supply end V1, the other end of the coil winding is connected with the collector of the fourth triode Tr4, the output end of the fourth relay J4 is connected with the live wire L of the non-isolated power supply after passing through the drain PUMP motor M4, and the other end of the coil winding of the fourth relay J4 is connected.
Illustratively, the drain pump control sub-circuit is for on-off control of a drain pump of a washing machine.
It should be understood that the operation principle of the drain pump control sub-circuit is the same as that of the switch gate control sub-circuit in fig. 5a, and the detailed description thereof is omitted.
Referring to fig. 6, fig. 6 is a circuit diagram of a motor circuit according to an embodiment of the present disclosure. The motor circuit includes a rotation speed control sub-circuit 61 and a steering control sub-circuit 62.
Illustratively, the motor circuit is connected to the control chip 20 for adjusting the rotational speed and direction of the washing machine motor M5.
Illustratively, the rotation speed control sub-circuit 61 includes a sixth photo-coupler OC6 and a thyristor G, wherein one end of a light emitting source of the sixth photo-coupler OC6 is connected to the rotation speed control terminal COM1 of the control chip, the other end is grounded, and the power supply terminal is connected to the first isolation power supply terminal V1, one end of a light receiver of the sixth photo-coupler OC6 is connected to the thyristor G, the other end is grounded, and the output terminal is connected to the motor M5, and the power supply terminal of the thyristor G is connected to the live wire L of the non-isolation power supply, and the other end is connected to the motor M5, for adjusting the rotation speed of the motor M5 according.
For example, a Silicon Controlled Rectifier (SCR) is a high power electrical component, also called a thyristor. It has the advantages of small volume, high efficiency, long service life, etc. In an automatic control system, the device can be used as a high-power driving device to realize the control of high-power equipment by using a low-power control. It is widely applied to speed regulating systems, power regulating systems and follow-up systems of alternating current and direct current motors.
The operating principle of the speed control sub-circuit 61 is as follows: the sixth photocoupler OC6 realizes the electrical isolation between the control chip 20 and the motor circuit: one end of a luminous source of the sixth photoelectric coupler OC6 is connected with a rotating speed control end COM1 of the control chip, and the rotating speed control end COM1 can transmit a rotating speed control signal; the rotation speed control signal is output at one end of the light receiver of the sixth photoelectric coupler OC6 after being subjected to the electric-optical-electric conversion by the sixth photoelectric coupler OC6, so that the rotation speed of the motor M5 is adjusted by the thyristor G.
Illustratively, the steering control sub-circuit 62 includes a fifth relay J5, a first input terminal of the fifth relay J5 is connected to the first isolated power supply terminal V1, and a second input terminal is connected to the steering control terminal COM2 of the control chip 20; the output end of the fifth relay J5 is connected with the motor M5, and the other end of the fifth relay J5 is connected with a zero line N of a non-isolated power supply.
The steering control sub-circuit 62 operates as follows: a coil winding of the fifth relay J5 is respectively connected with the first isolation power supply end V1 and the steering control end COM2 of the control chip 20; when the steering control terminal COM2 is turned from off to on, the coil winding current of the fifth relay J5 passes, so that the contacts of the fifth relay J5 are switched to switch the steering of the motor M5.
The embodiment of the application also provides a washing machine, which comprises the washing machine circuit shown in fig. 1 to 6.
In a possible embodiment, the control chip and the payment detection circuit of the washing machine adopt the same isolated power supply circuit for supplying power; in order to realize that the control chip can control other parts of the washing machine circuit and improve the use safety of the washing machine, the control chip adopts the photoelectric coupler and the relay to be connected with the detection circuit, the control circuit and the motor circuit of the washing machine, so as to realize electrical isolation, thereby realizing the technical effects of simplifying the circuit design, improving the reliability and the safety of the circuit and reducing the production cost.
In the several embodiments provided in the present application, it should be understood that the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A washing machine circuit is characterized by comprising an isolation power supply circuit, a control chip and a payment detection circuit;
the isolation power supply circuit is used for converting a non-isolation power supply end into a first isolation power supply end and a second isolation power supply end;
the control chip is connected with the second isolation power supply end and used for controlling the operation of the washing machine;
the payment detection circuit is respectively connected with the second isolation power supply end and the control chip and used for generating a starting signal when detecting a payment signal and sending the starting signal to the control chip so as to start the control chip to work.
2. A washing machine circuit as claimed in claim 1 wherein the isolated power supply circuit comprises a filtering and rectifying sub-circuit, a switching power supply sub-circuit;
the filtering and rectifying sub-circuit comprises a resistor, a first capacitor, a second capacitor and a first diode, wherein the first end of the resistor is connected with a live wire of the non-isolated power supply, and the second end of the resistor is connected with a zero line of the non-isolated power supply; the first end of the first capacitor is connected with the live wire of the non-isolated power supply, and the second end of the first capacitor is connected with the zero line of the non-isolated power supply; the anode of the first diode is connected, and the cathode of the first diode is connected with the first end of the second capacitor; the second end of the second capacitor is connected with a zero line of the non-isolated power supply;
the switch power supply sub-circuit comprises a third capacitor, a second diode, a transformer and a switch chip, wherein one end of a primary coil of the transformer is connected with a live wire of the non-isolated power supply, the other end of the primary coil of the transformer is connected with the input end of the switch chip, one end of a secondary coil of the transformer is connected with an anode of the second diode, and the other end of the secondary coil of the transformer is grounded; one end of the switch chip is connected with the zero line of the non-isolated power supply, and the other end of the switch chip is grounded; the cathode of the second diode is grounded after passing through the third capacitor;
the cathode of the second diode outputs the first isolation power supply terminal.
3. The washing machine circuit according to claim 2, wherein the switching power supply sub-circuit further comprises a transformer chip and a fourth capacitor, wherein an input end of the transformer chip is connected with an anode of the second diode, and an output end of the transformer chip is grounded through the fourth capacitor;
and the output end of the voltage transformation chip outputs the second isolation power supply end.
4. The circuit of claim 3, wherein the isolated power supply circuit further comprises a feedback sub-circuit, the feedback sub-circuit comprises a first photo-coupler and a voltage regulator diode, wherein one end of a light emitting source of the first photo-coupler is connected to an anode of the voltage regulator diode, the other end of the light emitting source is grounded, one end of a light receiver of the first photo-coupler is connected to the feedback end of the switch chip, and the other end of the light receiver is grounded; and the cathode of the voltage stabilizing diode is connected with the cathode of the second diode.
5. A washing machine circuit as claimed in claim 1 further comprising a detection circuit comprising:
the zero-crossing detection sub-circuit comprises a second photoelectric coupler, one end of a light emitting source of the second photoelectric coupler is connected with a live wire of the non-isolated power supply, the other end of the light emitting source of the second photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the second photoelectric coupler is connected with a zero-crossing detection end of the control chip, and the other end of the light receiver of the second photoelectric coupler is grounded;
the normal water level detection sub-circuit comprises a first water level sensor and a third photoelectric coupler, wherein one end of a light emitting source of the third photoelectric coupler is connected with the first water level sensor, the other end of the light emitting source of the third photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the third photoelectric coupler is connected with a normal water level detection end of the control chip, and the other end of the light receiver of the third photoelectric coupler is grounded;
the overhigh water level detection sub-circuit comprises a second water level sensor and a fourth photoelectric coupler, wherein one end of a light emitting source of the fourth photoelectric coupler is connected with the second water level sensor, the other end of the light emitting source of the fourth photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the fourth photoelectric coupler is connected with the overhigh water level detection end of the control chip, and the other end of the light receiver of the fourth photoelectric coupler is grounded;
the door closing detection sub-circuit comprises a washing machine door closing sensor and a fifth photoelectric coupler, wherein one end of a light emitting source of the fifth photoelectric coupler is connected with the washing machine door closing sensor, the other end of the light emitting source of the fifth photoelectric coupler is connected with a zero line of the non-isolated power supply, one end of a light receiver of the fifth photoelectric coupler is connected with a door closing detection end of the control chip, and the other end of the light receiver is grounded.
6. A washing machine circuit as claimed in claim 1 further comprising a control circuit comprising:
the switch gate control sub-circuit comprises a first relay, a first triode and a gate control motor, wherein the base electrode of the first triode is connected with the gate control signal end of the control chip, and the emitting electrode of the first triode is grounded; one end of a coil winding of the first relay is connected with the first isolation power supply end, and the other end of the coil winding of the first relay is connected with a collector electrode of the first triode; the output end of the first relay is connected with the live wire of the non-isolated power supply end after passing through the gate control motor, and the other end of the first relay is connected with the zero line of the non-isolated power supply end;
the first water inlet valve control sub-circuit comprises a second relay, a second triode and a first water inlet motor, wherein the base electrode of the second triode is connected with the first water inlet valve signal end of the control chip, and the emitting electrode of the second triode is grounded; one end of a coil winding of the second relay is connected with the first isolation power supply end, and the other end of the coil winding of the second relay is connected with a collector electrode of the second triode; the output end of the second relay is connected with the live wire of the non-isolated power supply end after passing through the first water inlet valve motor, and the other end of the second relay is connected with the zero line of the non-isolated power supply;
the second water inlet valve control sub-circuit comprises a third relay, a third triode and a second water inlet valve motor, wherein the base electrode of the third triode is connected with the signal end of the second water inlet valve of the control chip, and the emitting electrode of the third triode is grounded; one end of a coil winding of the third relay is connected with the first isolation power supply end, and the other end of the coil winding of the third relay is connected with a collector electrode of a third triode; the output end of the third relay is connected with the live wire of the non-isolated power supply end after passing through the second water inlet valve motor, and the other end of the third relay is connected with the zero line of the non-isolated power supply;
the drain pump control sub-circuit comprises a fourth relay, a fourth triode and a drain pump motor, wherein the base electrode of the fourth triode is connected with the drain pump signal end of the control chip, and the emitting electrode of the fourth triode is grounded; one end of a coil winding of the fourth relay is connected with the first isolation power supply end, and the other end of the coil winding of the fourth relay is connected with a collector electrode of a fourth triode; the output end of the fourth relay is connected with the live wire of the non-isolated power supply end after passing through the gate control motor, and the other end of the fourth relay is connected with the zero line of the non-isolated power supply.
7. A washing machine circuit as claimed in claim 6 further comprising a motor circuit connected to the control chip for adjusting the speed and direction of rotation of the motor.
8. The circuit of claim 7, wherein the motor circuit comprises a rotation speed control sub-circuit, the rotation speed control sub-circuit comprises a sixth photoelectric coupler and a thyristor, wherein one end of a light emitting source of the sixth photoelectric coupler is connected to the rotation speed control end of the control chip, the other end of the light emitting source is grounded, one end of a light receiver of the sixth photoelectric coupler is connected to the thyristor, and the other end of the light receiver is grounded; the controllable silicon is connected with the motor and used for adjusting the rotating speed of the motor according to the rotating speed control signal of the control chip.
9. The washing machine circuit of claim 7, wherein the motor circuit further comprises a steering control sub-circuit, the steering control sub-circuit comprising a relay, a first input terminal of the relay being connected to the first isolated power terminal, a second input terminal of the relay being connected to the steering control terminal of the control chip; the output end of the relay is connected with the motor.
10. A washing machine comprising a washing machine circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921652048.5U CN211142543U (en) | 2019-09-29 | 2019-09-29 | Washing machine circuit and washing machine |
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| CN201921652048.5U CN211142543U (en) | 2019-09-29 | 2019-09-29 | Washing machine circuit and washing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595951A (en) * | 2020-10-29 | 2021-04-02 | 华帝股份有限公司 | Compatible detection circuit and zero-crossing detection, gate detection and power failure memory detection method thereof |
| CN113110125A (en) * | 2021-03-15 | 2021-07-13 | 三门康创电子科技有限公司 | Fruit and vegetable machine control circuit, fruit and vegetable machine and fruit and vegetable machine control method |
| CN115029894A (en) * | 2022-06-24 | 2022-09-09 | 创维电器股份有限公司 | Washing machine monitoring system for realizing uart serial control by using Lua language |
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2019
- 2019-09-29 CN CN201921652048.5U patent/CN211142543U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595951A (en) * | 2020-10-29 | 2021-04-02 | 华帝股份有限公司 | Compatible detection circuit and zero-crossing detection, gate detection and power failure memory detection method thereof |
| CN113110125A (en) * | 2021-03-15 | 2021-07-13 | 三门康创电子科技有限公司 | Fruit and vegetable machine control circuit, fruit and vegetable machine and fruit and vegetable machine control method |
| CN113110125B (en) * | 2021-03-15 | 2022-04-01 | 三门康创电子科技有限公司 | Fruit and vegetable machine control circuit, fruit and vegetable machine and fruit and vegetable machine control method |
| CN115029894A (en) * | 2022-06-24 | 2022-09-09 | 创维电器股份有限公司 | Washing machine monitoring system for realizing uart serial control by using Lua language |
| CN115029894B (en) * | 2022-06-24 | 2023-12-12 | 创维电器股份有限公司 | Washing machine monitoring system for realizing uart serial control by using Lua language |
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