Driving control circuit, control board and clothes processing equipment

Abstract

The utility model provides a driving control circuit, a control board and clothes processing equipment. The driving control circuit comprises an optocoupler element and a first bidirectional silicon controlled rectifier; the optocoupler element comprises a photosensitive switch part which is used for being switched on under the condition that a driving signal is input; the first bidirectional thyristor is provided with a first end and a second end, the second end is used for connecting a load, the load is used for connecting one of a live wire or a zero line, and the first end is used for connecting the other of the live wire or the zero line; one end of the photosensitive switch is connected with the first end, and the other end of the photosensitive switch is connected with a control electrode of the first bidirectional silicon controlled rectifier; on one hand, the optocoupler element is arranged to isolate the driving signal from the heavy current connected with the load, so that the interference of the heavy current on the driving signal is reduced; and on the other hand, the direction of the first bidirectional silicon controlled rectifier is changed along with the reversing of the strong alternating current, so that the driving control of the load can be realized without an auxiliary power supply.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of load driving, and particularly relates to a driving control circuit, a control panel and a clothes processing apparatus. BACKGROUND

[0002] In an electronic device, the output of the electronic device needs to be controlled by a driving control circuit.

[0003] In the related art, a relay is controlled by a driving signal, and then the connection of the electronic device and the strong current (fire wire and zero wire) is realized. However, interference is easily generated between the driving signal and the strong current, and in particular, the strong current easily affects the driving signal, and then the output control precision of the electronic device is low. SUMMARY

[0004] The present application aims to provide a driving control circuit, a control panel and a clothes processing apparatus, and aims to solve the problem of low output control precision of the driving control circuit in the prior art.

[0005] A first aspect of the present application provides a driving control circuit, comprising:

[0006] a photocoupling element, the photocoupling element comprising a photosensitive switch, the photosensitive switch being configured to be turned on when a driving signal is input;

[0007] a first bidirectional thyristor, the first bidirectional thyristor having a first end and a second end, the second end being configured to be connected to a load, the load being configured to be connected to one of a fire wire or a zero wire, and the first end being configured to be connected to the other of the fire wire or the zero wire;

[0008] wherein one end of the photosensitive switch is connected to the first end, and the other end of the photosensitive switch is connected to a control electrode of the first bidirectional thyristor.

[0009] In some embodiments of the present application, the first end is a first anode end, the first end is configured to be connected to the zero wire, the second end is a second anode end, and the load is configured to be connected to the fire wire.

[0010] In some embodiments of the present application, the photosensitive switch comprises a second bidirectional thyristor, a first anode end of the second bidirectional thyristor is connected to a second anode end of the first bidirectional thyristor, and a second anode end of the second bidirectional thyristor is connected to a first anode end of the first bidirectional thyristor.

[0011] In some embodiments of the present application, at least one first voltage dividing resistor is arranged between the first end and the control electrode.

[0012] And / or, at least one second voltage dividing resistor is arranged between the photosensitive switch and the second end.

[0013] In some embodiments of the present application, the optocoupler element further comprises a light emitting diode, the light emitting diode being configured to emit light in the case of the input of the driving signal to turn on the photosensitive switch.

[0014] In some embodiments of the present application, the driving control circuit further comprises a first switch and a first power supply, the first power supply being connected to the positive electrode of the light emitting diode, one end of the first switch being connected to the negative electrode of the light emitting diode, and the other end being grounded.

[0015] The first switch is configured to be turned on in the case of the input of the driving signal.

[0016] In some embodiments of the present application, the control electrode of the first switch is configured to receive the driving signal; and / or, the driving signal is a pulse width modulation signal.

[0017] In some embodiments of the present application, the first switch is a MOS tube or a triode, in the case of the first switch being a triode, the base of the first switch is configured to receive the driving signal, the emitter of the first switch is grounded, and the collector of the first switch is connected to the light emitting diode.

[0018] The second aspect of the embodiments of the present application further provides a control board, the driving control circuit as described above being integrated on the control board.

[0019] The third aspect of the embodiments of the present application further provides a clothes treatment apparatus, the clothes treatment apparatus comprising the control board as described above.

[0020] The present application has the beneficial effects that: in the driving control circuit, the control board and the clothes treatment apparatus of the present application, the driving control circuit comprises an optocoupler element and a first bidirectional triode; the optocoupler element comprises a photosensitive switch, the photosensitive switch being configured to be turned on in the case of the input of the driving signal; the first bidirectional triode has a first end and a second end, the second end being configured to be connected to a load, the load being configured to be connected to one of a live wire or a neutral wire, and the first end being configured to be connected to the other of the live wire or the neutral wire; one end of the photosensitive switch is connected to the first end, and the other end of the photosensitive switch is connected to the control electrode of the first bidirectional triode; on the one hand, the optocoupler element is configured to isolate the driving signal and the strong electricity connected to the load, which is conducive to reducing the interference of the strong electricity on the driving signal; on the other hand, the direction of the first bidirectional triode changes along with the commutation of the strong electricity, and the driving control of the load can be realized without an auxiliary power supply. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1A schematic diagram of the framework structure of a drive control circuit provided in an embodiment of this application;

[0022] Figure 2 A schematic diagram of the framework structure of a drive control circuit provided in another embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the circuit structure of a drive control circuit provided in an embodiment of this application.

[0024] Specific element symbol explanation: 100-photosensitive element, 110-photosensitive switch, 200-first bidirectional thyristor, 300-load, T1-first terminal, T2-second terminal, L-live wire, N-neutral wire, CN2-load connector, Q2-first switch, VCC-first power supply. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as being "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] It's important to know that in electronic devices, drive control circuits are a crucial component in realizing the device's output functions. These circuits typically manage the connection between the electronic device and a high-voltage power source (live and neutral wires) by controlling the opening and closing of relays.

[0029] However, in related technologies, relays cannot isolate drive signals from high-voltage electricity, resulting in interference between them. This interference not only degrades the quality of the drive signal but can also lead to a decrease in the control accuracy of electronic equipment. Specifically, this manifests as delayed or erroneous response, or failure to execute control commands as expected, thus affecting the reliability and safety of the equipment. Since drive signals typically operate at relatively low voltages and currents, their anti-interference capability is relatively weak, making them susceptible to noise and transient voltage fluctuations generated by high-voltage power supplies. This is particularly evident in power systems; for example, sudden changes in high current during motor startup or shutdown can cause significant transient effects. This phenomenon is even more pronounced in large equipment, high-power appliances, and complex control systems.

[0030] Based on this, this application addresses traditional drive control circuits, control boards, and garment processing equipment.

[0031] Please see Figure 1 , Figure 1 This is a schematic diagram of the framework structure of the drive control circuit provided in this embodiment. The drive control circuit of this embodiment includes an optocoupler and a first bidirectional thyristor 200. The optocoupler includes a photosensitive switch 110, which is used to conduct when a drive signal is input. The first bidirectional thyristor 200 has a first terminal T1 and a second terminal T2. The second terminal T2 is used to connect to a load 300, and the load 300 is used to connect to either a live wire L or a neutral wire N. The first terminal T1 is used to connect to the other of the live wire L or the neutral wire N. One end of the photosensitive switch 110 is connected to the first terminal T1, and the other end of the photosensitive switch 110 is connected to the control electrode of the first bidirectional thyristor 200.

[0032] It should be explained that an optical signal can be output when a drive signal is input, and the photosensitive switch 110 is turned on according to the optical signal. Furthermore, after the photosensitive switch 110 is turned on, its two ends are connected. A bidirectional thyristor is a semiconductor device that can conduct current in two directions when its control electrode receives a trigger signal. A bidirectional thyristor mainly includes three terminals: a first anode, a second anode, and a control electrode. The first terminal T1 can be either the first anode or the second anode, and the second terminal T2 can be either the first anode or the second anode.

[0033] Understandably, one end of the photosensitive switch 110 is connected to the first terminal T1 of the first bidirectional thyristor 200, while the other end of the photosensitive switch 110 is connected to the control electrode of the first bidirectional thyristor 200. This connection means that when the photosensitive switch 110 is turned on due to receiving a drive signal, it will transfer a strong current to the control electrode of the bidirectional thyristor, thereby triggering the bidirectional thyristor to conduct.

[0034] In related technologies, relays and other components are used for drive control, which cannot achieve isolation between high-voltage and low-voltage electricity. However, this application uses optocouplers to isolate the drive signal from the high-voltage electricity connected to the load 300, which helps reduce interference from the high-voltage electricity to the drive signal. Furthermore, as the high-voltage AC power is reversed, the direction of the first bidirectional thyristor 200 also changes accordingly, enabling drive control of the load 300 without the need for an auxiliary power supply.

[0035] In some embodiments of this application, please refer to Figure 2 , Figure 2 The schematic diagram of the drive control circuit provided in this embodiment is shown; the first terminal T1 in this embodiment is the first anode terminal, which is used to connect the neutral line N, the second terminal T2 is the second anode terminal, and the load 300 is used to connect the live line L.

[0036] Understandably, when the AC current is positive, the second terminal T2 of the first bidirectional thyristor 200 is positive (+) and the second terminal T2 of the first bidirectional thyristor 200 is at 0 potential. Compared to the second terminal T2 being negative (-), the control terminal of the first bidirectional thyristor 200 is positive (+) between the second terminal T2 and the first terminal T1. Therefore, the first bidirectional thyristor 200 is in the first quadrant positive trigger mode. At this time, the current flows from the second terminal T2 of the first bidirectional thyristor 200 to its first terminal T1, and is in the same direction as the current from the live wire L to the neutral wire N, thereby driving the load 300.

[0037] When the AC current is negative, the second terminal T2 of the second bidirectional thyristor is negative (-), and the second terminal T2 of the first bidirectional thyristor 200 is at 0 potential. Compared to the positive voltage (+) of the second terminal T2, the control voltage of the first bidirectional thyristor 200 is negative (-) between the second terminal T2 and the first terminal T1. Therefore, the first bidirectional thyristor 200 is in the third quadrant positive trigger mode. At this time, the current flows from the first terminal T1 of the first bidirectional thyristor 200 to its second terminal T2, and is in the same direction as the current from the neutral line N to the live line L, thereby driving the load 300.

[0038] In other embodiments, the first terminal T1 can be connected to the load 300 first, and then to the neutral wire N, while the second terminal T2 is directly connected to the live wire L. When the AC voltage is positive or negative, the conduction principle of the first bidirectional thyristor 200 is the same as in the embodiments described above, and will not be repeated here.

[0039] In other embodiments, the first terminal T1 can be connected to the neutral wire N, and the second terminal T2 can be connected to the load 300 and then to the live wire L. When the AC voltage is positive or negative, the conduction principle of the first bidirectional thyristor 200 is similar to that in the above embodiments, and will not be elaborated here.

[0040] In other embodiments, the first terminal T1 can be connected to the load 300 and then to the neutral wire N, and the second terminal T2 can be connected to the live wire L. When the AC voltage is positive or negative, the conduction principle of the first bidirectional thyristor 200 is similar to that in the above embodiments, and will not be elaborated here.

[0041] In some embodiments of this application, please refer to Figure 3 , Figure 3 A schematic diagram of the circuit structure of the drive control circuit provided in this embodiment is shown; Figure 3 TR1 in the diagram represents the first bidirectional thyristor 200, G represents the control electrode of the first bidirectional thyristor 200, and HEAT-PWM represents the drive signal. The photosensitive switch 110 in this embodiment includes a second bidirectional thyristor, the first anode of the second bidirectional thyristor is connected to the second anode of the first bidirectional thyristor 200, and the second anode of the second bidirectional thyristor is connected to the first anode of the first bidirectional thyristor 200.

[0042] Understandably, the second bidirectional thyristor can function as a photosensitive element 100, conducting when the LED is emitting light and blocking when the LED is not emitting light. Compared to relays in related technologies, the second bidirectional thyristor has a longer switching life and higher durability. Furthermore, by connecting the second bidirectional thyristor to the first bidirectional thyristor 200, the bidirectional conduction performance of the second bidirectional thyristor allows control of the first bidirectional thyristor 200 without an auxiliary power supply, which helps reduce costs.

[0043] In some embodiments, please continue reading Figure 3 The second end, T2, can be connected to a load connector, which is also connected to a high-voltage circuit. Only after load 300 is connected to the load connector can the drive signal drive load 300. The user can choose whether or not to connect load 300 to the load connector. For example, the load connector can be a socket.

[0044] Please refer to the embodiments described in this application. Figure 3 In this embodiment, at least one first voltage divider resistor is provided between the first terminal T1 and the control electrode.

[0045] like Figure 3 As shown, R5 is used as the first voltage divider resistor. By setting the first voltage divider resistor, a voltage difference can be formed between the first terminal T1 and the control electrode, so as to control the conduction of the first bidirectional thyristor 200.

[0046] In another embodiment, at least one second voltage divider resistor is provided between the photosensitive switch 110 and the second terminal T2.

[0047] like Figure 3As shown, R3 and R4 are used as the second voltage divider resistors. By setting the second voltage divider resistors, a voltage difference can be formed between the second terminal T2 and the control electrode, so as to control the potential of the control electrode of the first bidirectional thyristor 200.

[0048] Please refer to the embodiments described in this application. Figure 3 The optocoupler element in this embodiment also includes a light-emitting diode (LED), which emits light when a drive signal is input to turn on the photosensitive switch 110.

[0049] It is understandable that after the driving signal is input, the light-emitting diode emits light and outputs a light signal. The photosensitive switch 110 receives the light signal and turns on, converting the light signal into an electrical signal. This helps to improve the isolation between the driving signal and the high voltage, and thus helps to reduce the interference of the high voltage on the driving signal.

[0050] Please refer to the embodiments described in this application. Figure 3 The drive control circuit of this embodiment also includes a first switch Q2 and a first power supply VCC. The first power supply VCC is connected to the positive terminal of the light-emitting diode. One end of the first switch Q2 is connected to the negative terminal of the light-emitting diode, and the other end is grounded. The first switch Q2 is configured to be turned on when a drive signal is input.

[0051] It is understandable that after the drive signal is input, the first switch Q2 grounds the LED, thereby forming a conduction circuit between the first power supply VCC and the LED to trigger the LED to emit light.

[0052] In some embodiments, the drive control circuit further includes a third voltage divider resistor, such as Figure 3 As shown, R2 is the third voltage divider resistor, which is placed between the first power supply VCC and the light-emitting diode.

[0053] Please refer to the embodiments described in this application. Figure 3 In this embodiment, the control electrode of the first switch Q2 is used to receive the drive signal. That is, the drive signal is directly input to the control electrode of the first switch Q2 to control the on / off state of the first switch Q2.

[0054] In some embodiments, the drive signal is a pulse width modulation (PWM) signal. Pulse width modulation is a control technique that combines analog and digital circuits. It modulates the width of a series of pulses to equivalently obtain the desired waveform (including shape and amplitude).

[0055] It is understandable that, within a fixed switching cycle, the average value of the output voltage or current of an analog circuit can be controlled by changing the duty cycle of the pulse signal (i.e., the ratio of pulse width to period). The duty cycle typically ranges from 0 to 100%, corresponding to the output quantity changing from minimum (e.g., 0V) to maximum (e.g., power supply voltage). Therefore, in this embodiment, the conduction and cutoff of the AC power in each cycle can be controlled by controlling the duty cycle of the pulse width modulation signal, thereby controlling the output power of the load 300.

[0056] For example, if the load 300 is a heating element or a heating component in a dryer, by controlling the duty cycle of the PWM signal, the heating element can be controlled more flexibly, and the rate of temperature rise can be controlled, thereby achieving the purpose of low-temperature drying.

[0057] Please refer to the embodiments described in this application. Figure 3 In this embodiment, the first switching element Q2 is a MOSFET or a transistor. When the first switching element Q2 is a transistor, the base of the first switching element Q2 is used to receive the drive signal, the emitter of the first switching element Q2 is grounded, and the collector of the first switching element Q2 is connected to a light-emitting diode.

[0058] like ​ The first switch Q2 shown is a transistor. The first switch Q2 can directly receive the control signal (corresponding drive signal) of the MCU to trigger the light-emitting diode to emit light.

[0059] To better implement the drive control circuit in any of the above embodiments, this embodiment also provides a control board, on which the drive control circuit is integrated.

[0060] To better implement the control board in any of the above embodiments, this embodiment also provides a garment processing device based on the control board described above. The garment processing device includes the control board as described above.

[0061] In some embodiments, the garment processing device can be a household garment processing device such as a cleaning device.

[0062] In some embodiments, the garment handling equipment is a washer-dryer combo, a dryer, etc.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0064] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0065] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0066] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0067] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A drive control circuit, characterized in that, The drive control circuit includes: An optocoupler element, the optocoupler element including a photosensitive switch element, the photosensitive switch element being turned on in the presence of a drive signal input; The first bidirectional thyristor has a first terminal and a second terminal, the second terminal being used to connect to a load, the load being used to connect to either a live wire or a neutral wire, and the first terminal being used to connect to the other of the live wire or the neutral wire. Wherein, one end of the photosensitive switch is connected to the first end, and the other end of the photosensitive switch is connected to the control electrode of the first bidirectional thyristor; The optocoupler element further includes a light-emitting diode (LED), which emits light in response to the drive signal input to turn on the photosensitive switch. The drive control circuit further includes a first switch, one end of which is connected to the negative terminal of the light-emitting diode, and the other end is grounded; the first switch is configured to be turned on when the drive signal is input. The first switching device is a MOSFET or a transistor. When the first switching device is a transistor, the base of the first switching device is used to receive the drive signal, the emitter of the first switching device is grounded, and the collector of the first switching device is connected to the light-emitting diode. The driving signal is a pulse width modulation signal, the load is a heating tube, and the pulse width modulation signal is used to control the temperature rise rate of the heating tube.

2. The drive control circuit according to claim 1, characterized in that, The first end is the first positive terminal, which is used to connect to the neutral wire. The second end is the second positive terminal, and the load is used to connect to the live wire.

3. The drive control circuit according to claim 2, characterized in that, The photosensitive switch includes a second bidirectional thyristor, the first anode of the second bidirectional thyristor being connected to the second anode of the first bidirectional thyristor, and the second anode of the second bidirectional thyristor being connected to the first anode of the first bidirectional thyristor.

4. The drive control circuit according to any one of claims 1 to 3, characterized in that, At least one first voltage divider resistor is provided between the first terminal and the control electrode; And / or, at least one second voltage divider resistor is provided between the photosensitive switch and the second terminal.

5. The drive control circuit according to claim 1, characterized in that, The drive control circuit also includes a first power supply, which is connected to the positive terminal of the light-emitting diode.

6. A control board, characterized in that, The drive control circuit as described in any one of claims 1 to 5 is integrated on the control board.

7. A garment processing device, characterized in that, The garment processing equipment includes the control panel as described in claim 6.

Images