Zero-crossing detection control circuit and laundry treating apparatus

Abstract

The application provides a zero-crossing detection control circuit and a clothes processing apparatus, and belongs to the technical field of household appliances. A power supply circuit provides a required grid voltage for an electrical device. A detection module is connected with the power supply circuit and can detect the voltage of the power supply circuit in real time to form a detection signal. A control module captures the moment when the grid alternating voltage passes zero each time through the detection signal to determine the zero-crossing time and realize the function of zero-crossing detection. A regulation and control module is connected with the detection module. In the standby state of the electrical device, the circuit in which the detection module is located is controlled to be disconnected according to a regulation and control signal, so that the detection module stops detecting the voltage of the power supply circuit. Therefore, through the zero-crossing detection control circuit provided by the application, it is realized that the power supply circuit does not flow through the current in the detection module in the standby state of the electrical device, zero-crossing detection zero power consumption is realized in the standby state, and the problem of high power consumption existing in the traditional detection circuit is solved.

Description

Technical Field

[0001] This application belongs to the field of home appliance technology, and in particular relates to a zero-crossing detection control circuit and a clothing processing device. Background Technology

[0002] With the rapid development of technology, various electrical devices have become deeply integrated into people's daily lives, greatly improving convenience and comfort. As the energy input for these devices, the stability and reliability of the power grid voltage play a decisive role in their performance, lifespan, and safety. When these devices are connected to the power grid, a zero-crossing detection circuit is needed to capture the moment the AC voltage crosses zero, providing a crucial time reference and signal basis for subsequent control strategy adjustments.

[0003] However, since the zero-crossing detection circuit detects the grid voltage, the power consumption of the electrical equipment will cause the zero-crossing detection circuit to continuously consume power, resulting in high power consumption of the electrical equipment. Utility Model Content

[0004] The purpose of this application is to provide a zero-crossing detection control circuit and a garment processing device, which aims to solve the problem of high power consumption in traditional detection circuits.

[0005] This application provides a zero-crossing detection control circuit, including:

[0006] The detection module is connected to the power supply circuit and is used to detect the voltage of the power supply circuit and output a detection signal.

[0007] A control module, connected to the detection module, is used to control the circuit containing the detection module to disconnect according to the control signal in standby mode;

[0008] A control module, connected to the detection module, is used to determine the zero-crossing time based on the detection signal;

[0009] The control module is also connected to the regulation module and is used to send the regulation signal to the regulation module.

[0010] In one embodiment, the control module is further configured to control the circuit containing the detection module to conduct according to the control signal during operation.

[0011] In one embodiment, the control module includes:

[0012] The first switching module is used to output a voltage control signal according to the adjustment signal in the standby state or the working state.

[0013] The second switch module is connected to the first switch module and the detection module, and is used to control the circuit where the detection module is located to be disconnected or turned on according to the voltage control signal.

[0014] In one embodiment, the first switch module includes:

[0015] A first transistor, wherein a first terminal of the first transistor receives the control signal and a second terminal of the first transistor is grounded;

[0016] The second transistor has a first terminal connected to the third terminal of the first transistor, a second terminal connected to a first power supply, and a third terminal outputting the voltage control signal.

[0017] In one embodiment, the first switch module further includes:

[0018] A first resistor, one end of which is connected to the third terminal of the first transistor, and the other end of which is connected to the first terminal of the second transistor;

[0019] The second resistor has one end connected to the second terminal of the second transistor and the other end connected to the first terminal of the second transistor.

[0020] A first capacitor, one end of which is connected to the other end of the second resistor, and the other end of the first capacitor is grounded.

[0021] In one embodiment, the first switch module further includes:

[0022] A second capacitor, one end of which is connected to the third terminal of the second transistor, and the other end of which is grounded; and / or

[0023] A third capacitor, one end of which is connected to the second terminal of the second transistor, and the other end of which is grounded; and / or

[0024] A fourth capacitor, one end of which is connected to the second terminal of the second transistor, and the other end of which is grounded.

[0025] In one embodiment, the second switch module includes:

[0026] The third transistor has a first terminal connected to the first switching module, a second terminal connected to the first terminal of the detection module, and a third terminal connected to the second terminal of the detection module. The third transistor is used to control the first terminal and the second terminal of the detection module to be disconnected or connected according to the voltage control signal.

[0027] In one embodiment, the second switch module further includes:

[0028] A third resistor, one end of which is connected to the first switch module, is used to acquire the voltage control signal;

[0029] A first diode, the anode of which is connected to the other end of the third resistor, and the cathode of which is connected to the first end of the third transistor;

[0030] A fourth resistor, one end of which is connected to the first end of the third transistor, and the other end of which is grounded.

[0031] In one embodiment, the detection module includes:

[0032] A voltage divider module is connected to one end of the power supply circuit and the second end of the third transistor, and is used to divide the voltage of the power supply circuit.

[0033] In one embodiment, the detection module further includes:

[0034] An optocoupler conversion module is connected to the third terminal of the third transistor and the other end of the power supply circuit. It is used to perform optocoupler conversion on the voltage of the power supply circuit and output a detection signal when the third transistor is turned on.

[0035] In one embodiment, the voltage divider module includes:

[0036] The second diode, the anode of which is connected to one end of the power supply circuit;

[0037] At least one fifth resistor, wherein at least one of the fifth resistors is connected to the cathode of the second diode and the second terminal of the third transistor.

[0038] In one embodiment, the optocoupler conversion module includes:

[0039] An optocoupler is provided, wherein the first input terminal of the optocoupler is connected to the third terminal of the third transistor, the second input terminal of the optocoupler is connected to the other end of the power supply circuit, the first output terminal of the optocoupler is used to output the detection signal, and the second output terminal of the optocoupler is grounded.

[0040] In one embodiment, the optocoupler conversion module further includes:

[0041] A third diode, wherein the anode of the third diode is connected to the second input terminal of the optocoupler, and the cathode of the third diode is connected to the first input terminal of the optocoupler; and / or

[0042] A sixth resistor, one end of which is connected to the first input terminal of the optocoupler, and the other end of which is connected to the second input terminal of the optocoupler.

[0043] In one embodiment, the optocoupler conversion module further includes:

[0044] A seventh resistor, one end of which is connected to a second power supply, and the other end of which is connected to the first output terminal of the optocoupler;

[0045] The eighth resistor has one end connected to the first output terminal of the optocoupler, and the other end is used to output the detection signal.

[0046] The fifth capacitor has one end connected to the other end of the eighth resistor, and the other end of the fifth capacitor is grounded.

[0047] This application provides a garment processing device, including any of the zero-crossing detection and control circuits described in the above embodiments.

[0048] The beneficial effects of this utility model embodiment compared with the prior art are:

[0049] The power supply circuit provides the required grid voltage to the electrical equipment. The detection module is connected to the power supply circuit and can detect the voltage of the power supply circuit in real time, generating a detection signal, which is then sent to the control module. The control module uses the detection signal to capture the moment each time the AC voltage of the grid crosses zero, in order to determine the zero-crossing time and realize the zero-crossing detection function.

[0050] The control module sends a control signal to the control module. The control module is connected to the detection module. In the standby state of the electrical equipment, the control module, according to the control signal, controls the circuit containing the detection module to disconnect, causing the detection module to stop detecting the voltage of the power supply circuit. Thus, through the zero-crossing detection control circuit provided in this application, no current flows through the detection module in the power supply circuit in the standby state of the electrical equipment, achieving zero power consumption for zero-crossing detection in the standby state and reducing the power consumption of the electrical equipment. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1A schematic diagram of the overall structure of the zero-crossing detection control circuit in some embodiments provided in this application.

[0053] Figure 2 A schematic diagram of the connection structure between the first switch module and the second switch module in some embodiments provided in this application.

[0054] Figure 3 The following is a schematic diagram of the specific circuit connection structure between the first switch module and the second switch module in some embodiments provided in this application.

[0055] Figure 4 A schematic diagram of the connection structure between the voltage divider module and the optocoupler conversion module in some embodiments provided in this application.

[0056] Figure 5 The following are schematic diagrams illustrating the specific circuit connection structure of the voltage divider module and the optocoupler conversion module in some embodiments provided in this application. Detailed Implementation

[0057] 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.

[0058] It should be noted that when a component is referred to as being "fixed to" or "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.

[0059] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0060] 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, in the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items that have substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or order of execution, and that "first" and "second" do not necessarily imply difference.

[0061] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0062] Please see Figure 1 This application provides a zero-crossing detection control circuit. The zero-crossing detection control circuit includes a detection module 10 and a control module 20. The detection module 10 is connected to the power supply circuit and is used to detect the voltage of the power supply circuit and output a detection signal. The control module 20 is connected to the detection module 10 and is used to control the circuit where the detection module 10 is located to disconnect according to the control signal in standby mode.

[0063] The control module 30 is connected to the detection module 10 and is used to determine the zero-crossing time based on the detection signal. The control module 30 is also connected to the control module 20 and is used to send control signals to the control module 20.

[0064] In this embodiment, the power supply circuit provides the required grid voltage to the electrical equipment. The detection module 10 is connected to the power supply circuit and can detect the voltage of the power supply circuit in real time, generate a detection signal, and send the detection signal to the control module 30. The control module 30 uses the detection signal to capture the moment when the AC voltage of the grid crosses zero each time, in order to determine the zero-crossing time and realize the zero-crossing detection function.

[0065] Control module 30 sends a control signal to control module 20. Control module 20 is connected to detection module 10. In the standby state of the electrical equipment, control module 20 controls the circuit containing detection module 10 to disconnect according to the control signal, causing detection module 10 to stop detecting the voltage of the power supply circuit. Thus, through the zero-crossing detection control circuit provided in this application, it is achieved that no current flows through detection module 10 in the power supply circuit in the standby state of the electrical equipment, realizing zero power consumption for zero-crossing detection in the standby state and reducing the power consumption of the electrical equipment.

[0066] In one embodiment, one end of the power supply circuit and the other end of the power supply circuit can form a complete closed loop. One end of the power supply circuit can be a live wire, and the other end of the power supply circuit can be a neutral wire, or the positive and negative terminals of other power supply devices, depending on the actual application scenario.

[0067] In one embodiment, the control module 20 is also used to control the circuit where the detection module 10 is located to be turned on according to the control signal when the circuit is in operation.

[0068] In this embodiment, the voltage of the power supply circuit needs to be monitored in real time during the operation of the electrical equipment to achieve zero-crossing detection. Furthermore, during operation, the control module 20 controls the circuit containing the detection module 10 to conduct according to the control signal, enabling the detection module 10 to operate normally. Thus, through the control module 20, the circuit containing the detection module 10 can be controlled to be disconnected or connected in standby or operating states, respectively, reducing the power consumption of the electrical equipment.

[0069] Please see Figure 2 In one embodiment, the control module 20 includes a first switch module 210 and a second switch module 220. The first switch module 210 is used to output a voltage control signal according to the control signal in standby or working state. The second switch module 220 is connected to the first switch module 210 and the detection module 10, and is used to control the circuit of the detection module 10 to be turned on or off according to the voltage control signal.

[0070] In this embodiment, when the first switch module 210 is in operation, it outputs a voltage control signal according to the control signal, i.e. Figure 2 The voltage VCC at node P controls the second switch module 220 to conduct, which in turn conducts the circuit where the detection module 10 is located, so that the detection module 10 can operate normally and realize the function of zero-crossing detection.

[0071] In standby mode, the first switch module 210 outputs a voltage control signal according to the control signal, which controls the second switch module 220 to disconnect, thereby disconnecting the circuit where the detection module 10 is located, so that the detection module 10 stops working, that is, it does not run, so that no current flows through the power supply circuit in the detection module 10, thus realizing zero-crossing detection and zero power consumption in standby mode.

[0072] Thus, through the second switch module 220 and the first switch module 210, the circuit where the detection module 10 is located can be controlled to be disconnected or connected in standby or working state, respectively, thereby reducing the power consumption of the electrical equipment.

[0073] In one embodiment, the first switch module 210 includes at least one transistor to perform the function of a switch, thereby controlling the on / off state of the circuit by controlling the conduction and cutoff states of the transistor.

[0074] Please see Figure 3 In one embodiment, the first switching module 210 includes a first transistor 211 and a second transistor 212. A first terminal of the first transistor 211 receives a control signal. A second terminal of the first transistor 211 is grounded. A first terminal of the second transistor 212 is connected to a third terminal of the first transistor 211. A second terminal of the second transistor 212 is connected to a first power supply. A third terminal of the second transistor 212 outputs a voltage control signal.

[0075] In this embodiment, the first terminal of the first transistor 211 receives a control signal, and the second terminal is grounded. Under the control of the control signal, the first transistor 211 is turned on. The first terminal of the second transistor 212 is connected to the third terminal of the first transistor 211. When the first transistor 211 is turned on, the first terminal of the second transistor 212 is grounded through the first transistor 211. Furthermore, the second terminal of the second transistor 212 is connected to the first power supply VCC1, causing the second transistor 212 to turn on. When the second transistor 212 is turned on, the first power supply VCC1 provides a voltage control signal VCC through the second transistor 212, causing the third terminal of the second transistor 212 to output the voltage control signal VCC.

[0076] Under the control of the regulating signal, the first transistor 211 is turned off. The first terminal of the second transistor 212 is connected to the third terminal of the first transistor 211. When the first transistor 211 is turned off, the second transistor 212 is also turned off. When the second transistor 212 is turned off, the first power supply VCC1 cannot provide the voltage control signal VCC, which can also be understood as floating, presenting a high impedance state, causing the circuit formed by the first switching module 210 to be disconnected and not operate.

[0077] In one embodiment, the first transistor 211 and the second transistor 212 can be field-effect transistors or bipolar transistors, which have advantages such as fast switching speed, convenient control, high reliability and easy integration.

[0078] In one embodiment, the first transistor 211 is a bipolar transistor, and the second transistor 212 is a metal-oxide-semiconductor field-effect transistor (MOSFET), which is a voltage-type control element that is convenient and reliable to control.

[0079] In one embodiment, the first switching module 210 further includes a first resistor 213, a second resistor 214, and a first capacitor 215. One end of the first resistor 213 is connected to the third terminal of the first transistor 211. The other end of the first resistor 213 is connected to the first terminal of the second transistor 212.

[0080] One end of the second resistor 214 is connected to the second terminal of the second transistor 212. The other end of the second resistor 214 is connected to the first terminal of the second transistor 212. One end of the first capacitor 215 is connected to the other end of the second resistor 214. The other end of the first capacitor 215 is grounded.

[0081] In this embodiment, the first resistor 213 is connected between the third terminal of the first transistor 211 and the first terminal of the second transistor 212, and plays the role of limiting the current and regulating the voltage in the circuit.

[0082] The second resistor 214 is connected between the second terminal and the first terminal of the second transistor 212. The second resistor 214 is also connected between the first power supply and the first capacitor 215. The second resistor 214 limits the current and regulates the voltage in the circuit. The first capacitor 215 stabilizes the voltage at the first terminal of the second transistor 212, ensuring stable and reliable operation of the second transistor 212.

[0083] In one embodiment, the first switching module 210 further includes a second capacitor 216 and / or a third capacitor 217 and / or a fourth capacitor 218. One end of the second capacitor 216 is connected to the third terminal of the second transistor 212. The other end of the second capacitor 216 is grounded. One end of the third capacitor 217 is connected to the second terminal of the second transistor 212. The other end of the third capacitor 217 is grounded. One end of the fourth capacitor 218 is connected to the second terminal of the second transistor 212. The other end of the fourth capacitor 218 is grounded.

[0084] In this embodiment, the second capacitor 216 is connected between the third terminal of the second transistor 212 and ground, which plays a role in stabilizing the voltage control signal VCC at the P node, so that the voltage control signal VCC is stably output to the second switch module 220 to control the conduction or disconnection of the circuit in which the second switch module 220 is located.

[0085] The third capacitor 217 is connected between the first power supply VCC1 and ground, and between the second terminal of the second transistor 212 and ground. It plays a stabilizing role in the voltage provided by the first power supply VCC1 and the voltage at the second terminal of the second transistor 212, so that the first switching module 210 can operate stably when the electrical equipment is in operation.

[0086] The fourth capacitor 218 is connected between the first power supply VCC1 and ground, and between the second terminal of the second transistor 212 and ground. It plays a stabilizing role in the voltage provided by the first power supply VCC1 and the voltage at the second terminal of the second transistor 212, so that the first switching module 210 can operate stably when the electrical equipment is in operation.

[0087] In one embodiment, the second switching module 220 includes a third transistor 221. A first terminal of the third transistor 221 is connected to the first switching module 210. A second terminal of the third transistor 221 is connected to a first terminal of the detection module 10. A third terminal of the third transistor 221 is connected to a second terminal of the detection module 10. The third transistor 221 is used to control the first and second terminals of the detection module 10 to be disconnected or connected according to a voltage control signal.

[0088] In this embodiment, the first terminal of the third transistor 221 is connected to the first switching module 210 and receives the voltage control signal VCC. Under the control of the voltage control signal VCC, the third transistor 221 is turned on, and a current flows between the second and third terminals of the third transistor 221. Thus, the first and second terminals of the detection module 10 are connected through the third transistor 221, making the circuit containing the detection module 10 conductive, enabling the detection module 10 to operate normally and achieve the zero-crossing detection function.

[0089] When the voltage control signal VCC cannot be provided, which can be understood as the P node being floating and exhibiting a high-resistance state, the third transistor 221 cannot be turned on, and therefore no current flows between the second and third terminals of the third transistor 221. Consequently, the first and second terminals of the detection module 10 are disconnected and cannot be connected through the third transistor 221, thus disconnecting the circuit containing the detection module 10 and preventing current from flowing through it. This achieves the goal of zero-crossing detection and zero power consumption in standby mode.

[0090] Thus, through the third transistor 221, the circuit where the detection module 10 is located can be controlled to be disconnected or turned on in the standby or working state of the electrical equipment, respectively, thereby reducing the power consumption of the electrical equipment and achieving zero power consumption for zero-crossing detection in the standby state.

[0091] In one embodiment, the third transistor 221 can be a field-effect transistor or a bipolar transistor, which has the advantages of fast switching speed, convenient control, high reliability and easy integration.

[0092] In one embodiment, the third transistor 221 is a MOSFET, which is a voltage-type control element, making control convenient and reliable.

[0093] In one embodiment, the second switch module 220 further includes a third resistor 222, a first diode 223, and a fourth resistor 224. One end of the third resistor 222 is connected to the first switch module 210 and is used to acquire a voltage control signal.

[0094] The anode of the first diode 223 is connected to the other end of the third resistor 222. The cathode of the first diode 223 is connected to the first terminal of the third transistor 221. One end of the fourth resistor 224 is connected to the first terminal of the third transistor 221. The other end of the fourth resistor 224 is grounded.

[0095] In this embodiment, one end of the third resistor 222 is connected to the first switch module 210 to limit the current supplied by the voltage control signal VCC in the second switch module 220, thereby protecting the various electronic components in the circuit. The first diode 223 has a unidirectional conduction characteristic, which can prevent reverse current in the circuit, thus protecting the various electronic components in the circuit.

[0096] The fourth resistor 224 is connected between the first terminal of the third transistor 221 and ground, and serves to limit the current and regulate the voltage in the circuit to ensure the stable and reliable operation of the third transistor 221. Thus, through the third resistor 222, the first diode 223 and the fourth resistor 224, the stable and reliable operation of the third transistor 221 can be ensured when the electrical equipment is in operation.

[0097] Please see Figure 4 In one embodiment, the detection module 10 includes a voltage divider module 110. The voltage divider module 110 is connected to one end of the power supply circuit and the second end of the third transistor 221, and is used to divide the voltage of the power supply circuit.

[0098] In this embodiment, the voltage divider module 110 is connected between one end of the power supply circuit and the second end of the third transistor 221, limiting the current and regulating the voltage in the circuit to prevent damage to the third transistor 221. The optocoupler conversion module 120 is connected between the third end of the third transistor 221 and the other end of the power supply circuit. The third transistor 221 enables the connection or disconnection between the voltage divider module 110 and the optocoupler conversion module 120.

[0099] In one embodiment, the detection module 10 further includes an optocoupler conversion module 120. The optocoupler conversion module 120 is connected to the third terminal of the third transistor 221 and the other end of the power supply circuit, and is used to perform optocoupler conversion on the voltage of the power supply circuit and output a detection signal when the third transistor 221 is turned on.

[0100] In this embodiment, when the third transistor 221 is turned on, the voltage divider module 110 and the optocoupler conversion module 120 are connected and turned on. The optocoupler conversion module 120 performs optocoupler conversion on the voltage signal regulated by the voltage divider module 110 and outputs a detection signal Zero. Through the detection signal Zero, the voltage of the power supply circuit can be detected, thereby capturing the moment when the AC voltage of the power grid crosses zero each time, so as to determine the zero-crossing time and realize the zero-crossing detection function.

[0101] When the third transistor 221 is disconnected, the voltage divider module 110 and the optocoupler conversion module 120 cannot be connected and a circuit cannot be formed, so neither the voltage divider module 110 nor the optocoupler conversion module 120 will operate. As a result, the circuit where the detection module 10 is located is disconnected, and the detection module 10 stops detecting the voltage of the power supply circuit.

[0102] Therefore, through the circuit connection structure between the voltage divider module 110, the optocoupler conversion module 120, and the third transistor 221, the power supply circuit is prevented from flowing through the voltage divider module 110 and the optocoupler conversion module 120 in the standby state of the electrical equipment, achieving zero-crossing detection and zero power consumption in the standby state, thus reducing the power consumption of the electrical equipment. Through the circuit connection structure between the voltage divider module 110, the optocoupler conversion module 120, and the third transistor 221, the power supply circuit is allowed to flow through the voltage divider module 110 and the optocoupler conversion module 120 in the operating state of the electrical equipment, enabling real-time detection of the power supply circuit voltage and achieving the zero-crossing detection function.

[0103] Please see Figure 5 In one embodiment, the voltage divider module 110 includes a second diode 111 and at least one fifth resistor 112. The anode of the second diode 111 is connected to one end of the power supply circuit. The at least one fifth resistor 112 is connected to the cathode of the second diode 111 and the second terminal of the third transistor 221.

[0104] In this embodiment, the number of fifth resistors 112 can be set according to the required resistance value in the actual application scenario, and can be one, two, three, or four, etc. At least one fifth resistor 112 divides the voltage of the power supply circuit, playing a role in flexibly adjusting the voltage and protecting circuit components. The second diode 111 is connected between one end of the power supply circuit and the multiple fifth resistors 112, which can prevent reverse current in the circuit.

[0105] In one embodiment, the voltage divider module 110 includes three fifth resistors 112. The three fifth resistors 112 are connected in series to divide the voltage of the power supply circuit, thereby flexibly adjusting the voltage and protecting the circuit components.

[0106] In one embodiment, the optocoupler conversion module 120 includes an optocoupler 121. A first input terminal of the optocoupler 121 is connected to a third terminal of a third transistor 221. A second input terminal of the optocoupler 121 is connected to the other end of a power supply circuit. A first output terminal of the optocoupler 121 is used to output a detection signal. A second output terminal of the optocoupler 121 is grounded.

[0107] In this embodiment, when the third transistor 221 is turned on, its third terminal is connected to its second terminal, allowing current to flow through it. One end of the power supply circuit is connected to the first input terminal of the optocoupler 121 via the voltage divider module 110 and the third transistor 221. Simultaneously, the second input terminal of the optocoupler 121 is connected to the other end of the power supply circuit, forming a current loop between the one end of the power supply circuit, the other end of the power supply circuit, and the input terminal of the optocoupler 121, causing the LED at the input terminal of the optocoupler 121 to operate. Consequently, the first output terminal of the optocoupler 121 outputs a detection signal "Zero". This detection signal "Zero" enables the detection of the voltage in the power supply circuit, thereby capturing the moment the AC voltage of the power grid crosses zero, determining the zero-crossing time, and achieving the zero-crossing detection function.

[0108] When the third transistor 221 is off, its third terminal cannot connect to its second terminal, and no current flows through it. One end of the power supply circuit cannot connect to the first input terminal of the optocoupler 121, preventing a current loop from forming between the first and second input terminals of the optocoupler 121. Consequently, the LED at the input terminal of the optocoupler 121 does not operate. Therefore, the optocoupler 121 stops working and ceases detecting the voltage of the power supply circuit.

[0109] In one embodiment, the optocoupler conversion module 120 further includes a third diode 122 and / or a sixth resistor 123. The anode of the third diode 122 is connected to the second input terminal of the optocoupler 121. The cathode of the third diode 122 is connected to the first input terminal of the optocoupler 121. One end of the sixth resistor 123 is connected to the first input terminal of the optocoupler 121. The other end of the sixth resistor 123 is connected to the second input terminal of the optocoupler 121.

[0110] In this embodiment, the third diode 122 is connected between the second input terminal and the first input terminal of the optocoupler 121. It can protect the light-emitting diode at the input terminal of the optocoupler 121 from damage by reverse voltage, thus protecting the optocoupler 121 and ensuring the stability of the circuit.

[0111] The sixth resistor 123 is also connected between the second input terminal and the first input terminal of the optocoupler 121. It serves as a current shunt to prevent damage to the LED at the input terminal of the optocoupler 121 due to excessive current. At the same time, it ensures that the output terminal of the optocoupler has a suitable signal strength, thus protecting the optocoupler 121 and ensuring the stability of the circuit.

[0112] In one embodiment, the optocoupler conversion module 120 further includes a seventh resistor 124, an eighth resistor 125, and a fifth capacitor 126. One end of the seventh resistor 124 is connected to a second power supply. The other end of the seventh resistor 124 is connected to the first output terminal of the optocoupler 121.

[0113] One end of the eighth resistor 125 is connected to the first output terminal of the optocoupler 121. The other end of the eighth resistor 125 is used to output the detection signal. One end of the fifth capacitor 126 is connected to the other end of the eighth resistor 125. The other end of the fifth capacitor 126 is grounded.

[0114] In this embodiment, an output transistor is disposed between the first and second output terminals of the optocoupler 121, which is part of the internal structure of the optocoupler 121. A seventh resistor 124 is connected between the second power supply +5V and the first output terminal of the optocoupler 121, providing the required bias voltage to the first output transistor of the optocoupler 121. Furthermore, when there is current at the input terminal of the optocoupler 121, the seventh resistor 124 can provide the bias voltage required for the output transistor of the optocoupler 121 to conduct.

[0115] Furthermore, when there is no current at the input terminal of the optocoupler 121, the seventh resistor 124 can provide a high-level signal at the output terminal of the optocoupler 121, providing a clear logic high-level signal for subsequent circuits, which is beneficial for the controlled module 30 to detect accurately.

[0116] The eighth resistor 125 and the fifth capacitor 126 form a filter circuit to filter the signal at the first output terminal of the optocoupler 121, resulting in a detection signal Zero. Furthermore, the filtered detection signal Zero is free of noise and is more stable and continuous, which facilitates more accurate zero-crossing detection and improves detection accuracy.

[0117] In one embodiment, the control module 30 can be a microcontroller, a field-programmable gate array, or a programmable logic controller, etc.

[0118] With the zero-crossing detection control circuit provided in this application, when the control signal is high during the operation of the electrical equipment, the control module 20 outputs a voltage control signal VCC at node P, controlling the third transistor 221 to turn on, thus enabling the detection module 10 to perform zero-crossing detection normally. Furthermore, during the positive half-cycle of the power supply circuit, the optocoupler 121 is turned on, and the detection signal Zero is low. During the negative half-cycle of the power supply circuit, the optocoupler 121 is not turned on, and the detection signal Zero is high.

[0119] When the electrical equipment is in standby mode and the control signal is low, the control module 20, based on the control signal, prevents the output of the voltage control signal VCC at node P. This can be understood as cutting off the voltage control signal VCC, causing the third transistor 221 to turn off, and the circuit containing the detection module 10 to disconnect, thus preventing zero-crossing detection. Consequently, no current flows through the detection module 10 throughout the entire power supply cycle, achieving zero-power consumption for zero-crossing detection in standby mode and reducing the power consumption of the electrical equipment.

[0120] In one embodiment, the electrical device can be a garment processing device. This application provides a garment processing device including the zero-crossing detection control circuit found in any of the above embodiments.

[0121] In this embodiment, the clothing processing equipment can be a washing machine, a drying machine, or a washer-dryer combo that can wash and dry clothes. The clothing processing equipment can be installed directly on the floor or a tabletop, or it can be wall-mounted or countertop.

[0122] The number and performance parameters of components such as resistors, diodes, capacitors, transistors, and optocouplers in the zero-crossing detection control circuit provided in this application can be adjusted according to the actual application scenario, as long as they can achieve the functions of each module in this application. The amplitude of the power supply connected to each component can be set according to the actual application scenario to provide the required voltage to the component.

[0123] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application.

[0124] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0125] In the embodiments provided in this application, the division of modules or units is merely a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be indirect couplings or communication connections through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0126] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0127] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0128] 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 zero-crossing detection control circuit, characterized in that, include: The detection module (10) is connected to the power supply circuit and is used to detect the voltage of the power supply circuit and output a detection signal; The control module (20) is connected to the detection module (10) and is used to control the circuit where the detection module (10) is located to disconnect according to the control signal in the standby state; The control module (30) is connected to the detection module (10) and is used to determine the zero-crossing time based on the detection signal; The control module (30) is also connected to the regulation module (20) and is used to send the regulation signal to the regulation module (20).

2. The zero-crossing detection and control circuit as described in claim 1, characterized in that, The control module (20) is also used to control the circuit where the detection module (10) is located to be turned on according to the control signal when the working state is in operation.

3. The zero-crossing detection control circuit as described in claim 2, characterized in that, The control module (20) includes: The first switching module (210) is used to output a voltage control signal according to the control signal in the standby state or the working state. The second switch module (220) is connected to the first switch module (210) and the detection module (10) and is used to control the circuit where the detection module (10) is located to be disconnected or turned on according to the voltage control signal.

4. The zero-crossing detection control circuit as described in claim 3, characterized in that, The first switch module (210) includes: A first transistor (211) is provided, wherein a first terminal of the first transistor (211) receives the control signal and a second terminal of the first transistor (211) is grounded. The second transistor (212) has a first terminal connected to the third terminal of the first transistor (211), a second terminal connected to the first power supply, and the third terminal of the second transistor (212) outputs the voltage control signal.

5. The zero-crossing detection control circuit as described in claim 4, characterized in that, The first switch module (210) further includes: A first resistor (213) is connected at one end to the third end of the first transistor (211), and at the other end to the first end of the second transistor (212). A second resistor (214) is connected at one end to the second end of the second transistor (212), and at the other end to the first end of the second transistor (212). The first capacitor (215) has one end connected to the other end of the second resistor (214), and the other end of the first capacitor (215) is grounded.

6. The zero-crossing detection control circuit as described in claim 4, characterized in that, The first switch module (210) further includes: A second capacitor (216), one end of which is connected to the third terminal of the second transistor (212), and the other end of which is grounded; and / or A third capacitor (217), one end of which is connected to the second terminal of the second transistor (212), and the other end of which is grounded; and / or A fourth capacitor (218) is provided, one end of which is connected to the second end of the second transistor (212), and the other end of which is grounded.

7. The zero-crossing detection control circuit as described in claim 3, characterized in that, The second switch module (220) includes: The third transistor (221) has its first end connected to the first switch module (210), its second end connected to the first end of the detection module (10), and its third end connected to the second end of the detection module (10). The third transistor (221) is used to control the first end and the second end of the detection module (10) to be disconnected or connected according to the voltage control signal.

8. The zero-crossing detection control circuit as described in claim 7, characterized in that, The second switch module (220) also includes: A third resistor (222) is connected at one end to the first switch module (210) for acquiring the voltage control signal; The first diode (223) has its anode connected to the other end of the third resistor (222), and its cathode connected to the first end of the third transistor (221). A fourth resistor (224) is provided, one end of which is connected to the first end of the third transistor (221), and the other end of which is grounded.

9. The zero-crossing detection control circuit as described in claim 7, characterized in that, The detection module (10) includes: A voltage divider module (110) is connected to one end of the power supply circuit and the second end of the third transistor (221) to divide the voltage of the power supply circuit.

10. The zero-crossing detection control circuit as described in claim 9, characterized in that, The detection module (10) further includes: The optocoupler conversion module (120) is connected to the third terminal of the third transistor (221) and the other end of the power supply circuit, and is used to perform optocoupler conversion on the voltage of the power supply circuit when the third transistor (221) is turned on, and output the detection signal.

11. The zero-crossing detection control circuit as described in claim 9, characterized in that, The voltage divider module (110) includes: The second diode (111) has its anode connected to one end of the power supply circuit; At least one fifth resistor (112) is connected to the cathode of the second diode (111) and the second terminal of the third transistor (221).

12. The zero-crossing detection and control circuit as described in claim 10, characterized in that, The optocoupler conversion module (120) includes: Optical coupler (121), the first input terminal of the optical coupler (121) is connected to the third terminal of the third transistor (221), the second input terminal of the optical coupler (121) is connected to the other end of the power supply circuit, the first output terminal of the optical coupler (121) is used to output the detection signal, and the second output terminal of the optical coupler (121) is grounded.

13. The zero-crossing detection control circuit as described in claim 12, characterized in that, The optocoupler conversion module (120) also includes: A third diode (122), the anode of which is connected to the second input terminal of the optocoupler (121), and the cathode of which is connected to the first input terminal of the optocoupler (121); and / or A sixth resistor (123) is provided, one end of which is connected to the first input terminal of the optocoupler (121), and the other end of which is connected to the second input terminal of the optocoupler (121).

14. The zero-crossing detection and control circuit as described in claim 12, characterized in that, The optocoupler conversion module (120) also includes: A seventh resistor (124) is connected at one end to a second power supply and at the other end to the first output terminal of the optocoupler (121). The eighth resistor (125) has one end connected to the first output terminal of the optocoupler (121), and the other end of the eighth resistor (125) is used to output the detection signal. The fifth capacitor (126) has one end connected to the other end of the eighth resistor (125), and the other end of the fifth capacitor (126) is grounded.

15. A garment processing device, characterized in that, It includes the zero-crossing detection control circuit according to any one of claims 1 to 14.

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