Signal output circuit, control panel and clothes processing equipment

Abstract

The utility model provides a signal output circuit, a control board and clothes processing equipment, the signal output circuit comprises a signal output unit powered by a first power supply and a control module, the signal output unit is used for outputting a driving signal based on the first power supply, and the load works under the condition that the driving signal is output; the signal output unit is triggered to work by outputting the second control signal, and the power supply state of the first power supply to the signal output unit is controlled by outputting the first control signal; namely, under the condition that the first control signal and the second control signal are both output, the signal output unit outputs the driving signal for starting the load only when meeting the two conditions of power supply of the first power supply and starting, so that the risk of mistakenly outputting the driving signal of the signal output unit is reduced; and the risk of mistakenly starting the load is reduced.

Description

Technical Field

[0001] The present application belongs to the field of load control technology, and in particular relates to a signal output circuit, a control board, and a clothing processing device. Background Art

[0002] Currently, control chips are often used to control the output of drive signals. In related technologies, only a single control signal output by the control chip is used to control the output of the drive signal. However, if the control signal is erroneously output, the drive signal may also be erroneously output, which may cause the load to malfunction. Summary of the Invention

[0003] The purpose of this application is to provide a signal output circuit, a control board and a clothing processing device, aiming to solve the problem that the driving signal is easily output incorrectly in the traditional technology.

[0004] A first aspect of an embodiment of the present application provides a signal output circuit, the signal output circuit comprising:

[0005] a signal output unit powered by a first power supply, the signal output unit being configured to output a driving signal based on the first power supply, the driving signal being configured to start a load;

[0006] A control module is used to output a first control signal between the signal output unit and the first power supply, and when the first control signal is output, the first power supply supplies power to the signal output unit; and is used to output a second control signal to the signal output unit and trigger the signal output unit to output the drive signal.

[0007] In some embodiments of the present application, the first control signal is a periodic signal; and / or the signal output unit includes a first switch element, and the second control signal is a control signal of a control electrode of the first switch element.

[0008] In some embodiments of the present application, the first control signal is a pulse width modulation signal.

[0009] In some embodiments of the present application, the signal output circuit further includes:

[0010] The frequency selection unit is configured to receive the first control signal, wherein the frequency selection unit has a preset cutoff frequency, and the frequency of the first control signal is greater than the preset cutoff frequency.

[0011] A second switch element is provided between the first power supply and the signal output unit; when the first control signal passes through the frequency selection unit, the second switch element is turned on.

[0012] In some embodiments of the present application, the signal output circuit further comprises:

[0013] a third switch element, one end of which is connected to the control electrode of the second switch element, and the other end of which is grounded, and in the case that the third switch element is turned on, the second switch element is turned on;

[0014] wherein the frequency selection unit is connected to the control electrode of the third switch element, and in the case that the first control signal passes through the frequency selection unit, the third switch element is turned on.

[0015] In some embodiments of the present application, the signal output unit comprises a first link, a link starting point of the first link being connected to the first power supply, and a link ending point of the first link being grounded; a driving element and the first switch element are arranged between the link starting point and the link ending point of the first link, and in the case that the first switch element is closed, the driving element works to output the driving signal.

[0016] In some embodiments of the present application, the driving element comprises a relay, the relay being arranged between the link starting point and the link ending point of the first link, and in the case that the first switch element is closed, the relay works and outputs the driving signal.

[0017] In some embodiments of the present application, the signal output unit further comprises:

[0018] a second link, a link starting point of the second link being connected to a second power supply, and a link ending point of the second link being used to output a sub-control signal based on the second power supply, and in the case that the sub-control signal is output, the driving signal is output;

[0019] a light coupling element, comprising a light emitting element and a light sensitive element, the light emitting element being arranged between the link starting point and the link ending point of the first link, and the light sensitive element being arranged between the link starting point and the link ending point of the second link, and in the case that the first switch element is closed, the light emitting element emits light to turn on the second link and output the sub-control signal.

[0020] In some embodiments of the present application, the signal output unit further comprises:

[0021] a third link, a link starting point of the third link being used to access a signal source, and a link ending point of the third link being used to output the driving signal based on the signal source;

[0022] a fourth switch element, arranged between the link starting point and the link ending point of the third link, and the fourth switch element being used to close in the case that the sub-control signal is output, to turn on the third link.

[0023] A second aspect of the embodiments of the present application further provides a control board, on which the signal output circuit as described above is integrated.

[0024] A third aspect of the embodiments of the present application further provides a clothing processing device, which includes the control panel as described above.

[0025] The beneficial effects of the present application are: in the signal output circuit, control panel and clothing processing device of the present application, the signal output circuit includes a signal output unit and a control module powered by a first power supply, the signal output unit is used to output a drive signal based on the first power supply, and the load works when the drive signal is output; in the present application, not only the signal output unit is triggered to work by outputting the second control signal, but also the power supply state of the first power supply to the signal output unit is controlled by outputting the first control signal; that is, when both the first control signal and the second control signal are output, the signal output unit will output the drive signal for starting the load only when the two conditions of power supply by the first power supply and startup are met, which is beneficial to reducing the risk of erroneous output of the drive signal of the signal output unit, and thus is beneficial to reducing the risk of erroneous startup of the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the framework structure of a signal output circuit provided in one embodiment of the present application;

[0027] Figure 2 A schematic diagram of the circuit structure of a signal output unit provided in one embodiment of the present application;

[0028] Figure 3 A schematic diagram of the circuit structure of a signal output circuit provided in one embodiment of the present application;

[0029] Figure 4 A schematic diagram of the circuit structure of a signal output unit provided in another embodiment of the present application.

[0030] Specific element symbol description: 100-first power supply, 200-signal output unit, 300-control module, 400-load, R7-first resistor, C2-first capacitor, C1-second capacitor, R6-second resistor, Q3-second switch element, Q2-third switch element, D2-third diode. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0034] It's important to note that with the rapid development of modern electrical control technology, control chips are increasingly being used in various clothing handling devices. These control chips are typically responsible for outputting drive signals to control the operating state of the load. However, existing approaches that primarily rely on a single control signal output by the control chip to drive the load have certain limitations. In particular, if the control signal is erroneously output, the drive signal may also be erroneously output. This can lead to the load's erroneous activation, causing a series of safety risks and equipment damage.

[0035] In many applications, the operating status of the load requires extremely high accuracy of the control signal. For example, in smart homes, industrial automation, and medical equipment, if the control signal is incorrectly output, it may cause the device to malfunction and even pose a threat to personnel safety.

[0036] To improve the reliability and anti-interference capabilities of control systems, more complex signal processing and output methods need to be explored. This includes, but is not limited to, the introduction of multiple confirmation mechanisms, redundant signal designs, and intelligent discrimination algorithms to reduce the risk of load misactivation due to a single erroneous control signal output. Therefore, there is an urgent need to develop a new control method that can enhance safety and stability during signal output, ensuring accurate and reliable load startup and shutdown.

[0037] Based on this, the present application is directed to traditional signal output circuits, control panels and clothing processing equipment.

[0038] See also Figure 1 , Figure 1A schematic diagram of a framework structure of a signal output circuit provided by the embodiment; the signal output circuit of the embodiment comprises a signal output unit 200 and a control module 300 powered by a first power supply 100; the signal output unit 200 is configured to output a driving signal based on the first power supply 100, the driving signal being used to start a load 400; the control module 300 is configured to output a first control signal to the signal output unit 200 and the first power supply 100, and in the case of outputting the first control signal, the first power supply 100 powers the signal output unit 200; and configured to output a second control signal to the signal output unit 200, and trigger the signal output unit 200 to output the driving signal.

[0039] It should be explained that the load 400 can refer to any device or circuit that needs to be driven. The control module 300 can be a controller, a processor, a single-chip microcomputer, etc.

[0040] It can be understood that the signal output unit 200 is powered by the first power supply 100, so the signal output unit 200 can only be started when the first power supply 100 outputs power to the signal output unit 200. The first power supply 100 can only output power to the signal output unit 200 in the case of outputting the first control signal, so the function of the first control signal is to trigger the first power supply 100 to power the signal output unit 200. In other words, when the first control signal is not output, the first power supply 100 cannot power the signal output unit 200. And under the premise of the first power supply 100 powering the signal output unit 200, the second control signal triggers the signal output unit 200 to output the driving signal. In other words, if the first power supply 100 cannot power the signal output unit 200, even if the second control signal is output, the signal output unit 200 cannot output the driving signal.

[0041] Current signal output circuits are mostly controlled by a single control signal, which can easily cause the driving signal to be misoutput. However, in the present application, not only is the signal output unit 200 triggered to work by outputting the second control signal, but the first power supply 100 is also controlled by outputting the first control signal to control the power supply state of the signal output unit 200; that is, in the case of outputting the first control signal and the second control signal, the signal output unit 200 meets the two conditions of first power supply and starting to output the driving signal for starting the load 400, which is beneficial to reduce the risk of misoutput of the driving signal of the signal output unit 200, and further beneficial to reduce the risk of misstarting the load 400.

[0042] In some embodiments of the present application, the first control signal of the embodiment is a periodic signal.

[0043] It needs to be explained that the periodic signal is a wave signal with certain periodic regularity. The periodic signal usually depends on the accurate control of the timer and the real-time scheduling of the program. If the control module 300 malfunctions, it may not be able to correctly generate the periodic signal at the expected frequency and duty cycle.

[0044] It can be understood that, in the normal case of the control module 300, the control module 300 can accurately output the periodic signal, but in the case of the control module 300 malfunctioning, the control module 300 is difficult to accurately output the periodic signal. Therefore, the case that the signal output unit 200 still outputs the driving signal due to the control module 300 malfunctioning can be avoided, so as to reduce the risk of the load 400 being mistakenly started.

[0045] Please refer to Figure 2 , Figure 2 The circuit structure schematic diagram of the signal output unit 200 provided by the embodiment is shown. The signal output unit 200 includes a first switching element, and the second control signal is a control signal for the control electrode of the first switching element.

[0046] It can be understood that the first switching element can be a triode, a MOS tube or other similar switching element. In the case of the control module 300 malfunctioning, the control module 300 is still prone to outputting a high level or a low level uncontrollably, which may cause the first switching element to be turned on. If the first control signal is not set, the signal output unit 200 will output the driving signal to mistakenly start the load 400 at this time.

[0047] Especially for the single-chip microcomputer and the triode, when the single-chip microcomputer is normally running, if a fault occurs (for example, unstable power supply voltage, program bug, etc.), the output port thereof may remain at a high level (close to the power supply voltage). This condition may cause the connected triode to be mistakenly turned on, causing it to enter the on state, which may cause the load 400 to be mistakenly driven. Exemplarily, in a clothes dryer, if the driving signal is mistakenly output, the drain pump and the drying module therein may be started at an inappropriate time, which may cause the clothes dryer to malfunction and cause related accidents.

[0048] In some embodiments of the present application, the first control signal is a pulse width modulation (PWM) signal.

[0049] It can be understood that the PWM signal is a square wave signal that switches quickly, and the duty cycle thereof can control the output power or brightness by changing the time ratio of the high level and the low level. For the control module 300, especially the single-chip microcomputer, it is easier and more stable to output a high level signal, because it does not need complex control logic, while the PWM signal needs to depend on the normal program and clock signal, so it is more difficult to maintain normal output in the case of malfunction.

[0050] In some embodiments of this application, please refer to Figure 3 , Figure 3 FIG. 4 shows a schematic diagram of the circuit structure of the signal output circuit provided in this embodiment; FIG. Figure 3 In the example, RELAY_+12V_EN corresponds to the first control signal, the first resistor R7 and the first capacitor C2 together form a frequency selection unit, and +12V corresponds to the first power supply 100. The signal output circuit of this embodiment also includes a frequency selection unit and a second switch Q3; the frequency selection unit is used to receive the first control signal and has a preset cutoff frequency, and the frequency of the first control signal is greater than the preset cutoff frequency; the second switch Q3 is disposed between the first power supply 100 and the signal output unit 200; when the first control signal passes through the frequency selection unit, the second switch Q3 is turned on.

[0051] It should be explained that the frequency selection unit has a preset cutoff frequency. Only signals with frequencies greater than the preset cutoff frequency can pass through the frequency selection unit, while signals with frequencies lower than the preset cutoff frequency are filtered out by the frequency selection unit. The second switch element Q3 can be a transistor, MOS transistor, or other similar switching element.

[0052] It is understandable that by providing the frequency selection unit to filter out other interference signals, the risk of mis-conduction of the second switch element Q3 is reduced, thereby facilitating the reduction of the risk of mis-output of the driving signal.

[0053] In some embodiments of this application, please continue to refer to Figure 3 The signal output circuit of this embodiment further includes a third switch element Q2; one end of the third switch element Q2 is connected to the control electrode of the second switch element Q3, and the other end is grounded. When the third switch element Q2 is turned on, the second switch element Q3 is turned on; wherein the frequency selection unit is connected to the control electrode of the third switch element Q2, and when the first control signal passes through the frequency selection unit, the third switch element Q2 is turned on.

[0054] It can be understood that, when the first control signal is output, the third switch Q2 satisfies the conduction condition and is turned on; after the third switch Q2 is turned on, the control electrode of the second switch Q3 is grounded, causing the second switch Q3 to be turned on. After the second switch Q3 is turned on, the first power supply 100 is directly connected to the power input terminal of the signal output unit 200 (corresponding to Figure 3 +12V' in the

[0055] In some embodiments, please refer to Figure 3 The second switch Q3 is a PNP transistor, and the emitter of the second switch Q3 is connected to the first power supply 100, the collector is connected to the power input terminal of the signal output unit 200, and a resistor is connected in series between the emitter and the base (control electrode) of the second switch Q3 (corresponding to Figure 3 (R5).

[0056] The third switch Q2 is an NPN transistor, and the emitter of the third switch Q2 is grounded. A resistor (corresponding to Figure 3 A resistor is connected in series between the base and emitter of the third switch element Q2 (corresponding to Figure 3 (R8).

[0057] The signal output circuit further includes a second capacitor C1 and a second resistor R6. One end of the second resistor R6 is connected to the base of the third switch Q2, and the other end is connected to the second capacitor C1. The other end of the second capacitor C1 is connected between the resistor R8 and the emitter of the third switch Q2.

[0058] The signal output circuit further includes a first diode and a second diode (such as Figure 3 Where D1 is the first diode and the second diode), the positive electrode of the first diode is connected to the frequency selection unit, and the negative electrode is connected to the connection point of the second capacitor C1 and the second resistor R6; the positive electrode of the second diode is connected to the connection point of the second capacitor C1 and the resistor R8, and the negative electrode is connected to the frequency selection unit.

[0059] In some embodiments of this application, please continue to refer to Figure 2 ,like Figure 2 In the figure, WATER_HEAT is the second control signal, +12V' is the starting point of the first link, GND is the end point of the first link, K1A is the driver element, and Q4 is the first switch element. The starting point of the link, +12V', passes through the driver element K1A and the first switch element Q4 to the end point GND, forming the first link. The signal output unit 200 of this embodiment includes a first link, the starting point of the first link being connected to the first power supply 100, and the end point of the first link being grounded. A driver element and a first switch element are disposed between the starting point and the end point of the first link. When the first switch element is closed, the driver element operates to output a drive signal.

[0060] In some embodiments, please refer to Figure 2 In this embodiment, the first switch element is an NPN transistor, and the emitter of the first switch element is grounded, and the collector of the third switch element Q2 is connected to the driving element.

[0061] The signal output unit 200 further includes a third diode D2, which is connected in parallel with the driving element, and the anode of the third diode D2 is connected to the connection point between the collector of the first switch element and the driving element, and the cathode of the third diode D2 is connected between the driving element and the starting point of the link.

[0062] In some embodiments of the present application, the driving element comprises a relay, the relay is arranged between the link start point and the link end point of the first link, and the relay works and outputs the driving signal when the first switch is closed.

[0063] It can be understood that the relay can be used to output the driving signal to trigger the load 400 to work, for example, the relay controls the switch between the load 400 and its power supply to be closed to trigger the load 400 to work.

[0064] In some embodiments of the present application, please refer to Figure 4 , Figure 4 The circuit structure schematic diagram of the signal output circuit provided by the present embodiment is shown. As shown in Figure 4 , DRAIN_PUMP is the second control signal, +12V' is the link start point of the first link, GND is the link end point of the first link, U1 is the driving element, Q1 is the first switch, and the link start point +12V' reaches the link end point GND via the resistor R1, the driving element U1, and the first switch Q1 to form the first link. As shown in Figure 4 , -12V_N is the second power supply, and DRAIN_PUMP_N is the driving signal.

[0065] The signal output unit 200 of the present embodiment further comprises a second link and an optical coupling element; the link start point of the second link is connected to the second power supply, the link end point of the second link is used to output a sub-control signal based on the second power supply, and the driving signal is output when the sub-control signal is output; the optical coupling element comprises a light-emitting element and a light-sensitive element, the light-emitting element is arranged between the link start point and the link end point of the first link, the light-sensitive element is arranged between the link start point and the link end point of the second link, and the light-emitting element emits light to make the second link conductive and output the sub-control signal when the first switch is closed.

[0066] In some embodiments of the present application, please continue to refer to Figure 4 , as shown in Figure 4 , N is the signal source, and the third link is formed by passing through the fourth switch from the signal source N to the link end point where the driving signal is output. The signal output unit 200 of the present embodiment further comprises a third link and a fourth switch; the link start point of the third link is used to access the signal source, and the link end point of the third link is used to output the driving signal based on the signal source; the fourth switch is arranged between the link start point and the link end point of the third link, and the fourth switch is used to close when the sub-control signal is output to make the third link conductive.

[0067] In some embodiments, please continue to refer to Figure 4 , the fourth switch is a bidirectional thyristor, the anode of the fourth switch is connected to the signal source, the cathode is connected to the link end point of the third link, and the gate (control electrode) is connected to the link end point of the second link.

[0068] In some embodiments, a resistor (corresponding to Figure 4 (R3).

[0069] In order to better implement the signal output circuit in any of the above embodiments, based on the above signal output circuit, this embodiment further provides a control board, such as the above signal output circuit integrated on the control board.

[0070] In order to better implement the signal output circuit in any of the above embodiments, based on the above signal output circuit, this embodiment further provides a clothing processing device, and the clothing processing device includes the control board as described above.

[0071] In some embodiments, the laundry treatment device may be a household laundry treatment device such as a cleaning device.

[0072] In some embodiments, the clothing treatment device is a washing machine, a dryer, etc.

[0073] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0074] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0075] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0076] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0077] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A signal output circuit, characterized in that: The signal output circuit includes: a signal output unit powered by a first power supply, the signal output unit being configured to output a driving signal based on the first power supply, the driving signal being configured to start a load; A control module is used to output a first control signal between the signal output unit and the first power supply, and when the first control signal is output, the first power supply supplies power to the signal output unit; and is used to output a second control signal to the signal output unit and trigger the signal output unit to output the drive signal.

2. The signal output circuit according to claim 1, wherein: The first control signal is a periodic signal; and / or the signal output unit includes a first switch element, and the second control signal is a control signal of a control electrode of the first switch element.

3. The signal output circuit according to claim 2, wherein: The first control signal is a pulse width modulation signal.

4. The signal output circuit according to claim 2 or 3, characterized in that: The signal output circuit further includes: a frequency selection unit, configured to receive the first control signal, wherein the frequency selection unit has a preset cutoff frequency, and the frequency of the first control signal is greater than the preset cutoff frequency; A second switch element is provided between the first power supply and the signal output unit; when the first control signal passes through the frequency selection unit, the second switch element is turned on.

5. The signal output circuit according to claim 4, characterized in that: The signal output circuit further includes: a third switch element, one end of the third switch element being connected to the control electrode of the second switch element and the other end being grounded, and when the third switch element is turned on, the second switch element is turned on; The frequency selection unit is connected to the control electrode of the third switch element, and when the first control signal passes through the frequency selection unit, the third switch element is turned on.

6. The signal output circuit according to claim 2, wherein: The signal output unit includes a first link, a link start point of the first link is connected to the first power supply, and a link end point of the first link is grounded; a driving element and the first switch element are provided between the link start point and the link end point of the first link, and when the first switch element is closed, the driving element operates to output the driving signal.

7. The signal output circuit according to claim 6, characterized in that: The driving element includes a relay, which is arranged between a link start point and a link end point of the first link. When the first switch is closed, the relay operates and outputs the driving signal.

8. The signal output circuit according to claim 6, wherein: The signal output unit further includes: a second link, wherein a link start point of the second link is connected to a second power source, and a link end point of the second link is configured to output a sub-control signal based on the second power source, and when the sub-control signal is output, the driving signal is output; The optocoupler element includes a light-emitting element and a photosensitive element, wherein the light-emitting element is arranged between the link start point and the link end point of the first link, and the photosensitive element is arranged between the link start point and the link end point of the second link. When the first switch element is closed, the light-emitting element emits light to turn on the second link and output the sub-control signal.

9. The signal output circuit according to claim 8, characterized in that: The signal output unit further includes: a third link, wherein a link start point of the third link is used to access a signal source, and a link end point of the third link is used to output the driving signal based on the signal source; A fourth switch element is provided between a link start point and a link end point of the third link, and the fourth switch element is configured to be closed when the sub-control signal is output to conduct the third link.

10. A control panel, characterized in that: The signal output circuit according to any one of claims 1 to 9 is integrated on the control board.

11. A clothes processing device, characterized in that: The clothes treating apparatus includes the control board according to claim 10.

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