Power switch control circuit and laundry treating apparatus

Abstract

This application provides a power switch control circuit and a clothing processing device, belonging to the field of home appliance control technology. An optocoupler module is connected to a first switch module. A second switch module is also connected to the optocoupler module. The optocoupler module provides electrical signal isolation between the first and second switch modules. The second switch module is connected to the power supply and the load. When the first switch module does not receive a control signal from the host computer, it controls the optocoupler module to turn off. When the optocoupler module is off, the second switch module controls the power supply to supply power to the load. By controlling the optocoupler module to turn off when the first switch module does not receive a control signal from the host computer, and thus enabling the second switch module to control the power supply to supply power to the load, the problem of being unable to control the power supply to supply power to the load when the host computer control signal is affected by electromagnetic interference, intermittent loss, or poor contact at the signal harness connection terminals is solved.

Description

Technical Field

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

[0002] With the rapid development of technology, various electrical appliances have become deeply integrated into people's daily lives, greatly improving convenience and comfort. In these appliances, a host computer sends control signals, which are connected to the lower-level control circuit via signal harnesses. The lower-level control circuit then switches the power supply to loads requiring power (such as components, circuits, or functional modules within the lower-level computer, or electrical devices connected and controlled by the lower-level computer), ensuring the lower-level control system is powered, operates normally, and controls the operation of all electrical appliances.

[0003] However, in traditional circuits, when the control signal sent by the host computer is subjected to electromagnetic interference, is occasionally lost, or has poor contact at the connection terminals of the signal harness (e.g., due to vibration of electrical equipment causing poor contact), the lower-level control circuit will be unable to control the power supply to the load that needs power, resulting in the load that needs power becoming uncontrollable and unable to operate normally. Utility Model Content

[0004] The purpose of this application is to provide a power switch control circuit and a garment processing device, which aims to solve the problem of power failure caused by electromagnetic interference to the control signal or poor contact of the signal harness connection terminals in traditional circuits.

[0005] This application provides a power switch control circuit, including:

[0006] First switch module;

[0007] The optocoupler module is connected to the first switch module.

[0008] The second switch module is connected to the optocoupler module. The optocoupler module is used to provide electrical signal isolation between the first switch module and the second switch module. The second switch module is also used to connect to the power supply and the load.

[0009] The first switch module is used to control the optocoupler module to turn off when no control signal from the host computer is received;

[0010] The second switch module is used to control the power supply to supply power to the load when the optocoupler module is turned off.

[0011] In one embodiment, the first switch module is further configured to control the optocoupler module to conduct when the host computer control signal is received;

[0012] The second switching module is also used to control the power supply to stop supplying power to the load when the optocoupler module is turned on;

[0013] The host computer is used to send a host computer control signal to the first switch module when the electrical equipment is in standby or off state.

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

[0015] The first N-type bipolar transistor has its base terminal connected to the host computer, its emitter terminal grounded, and its collector terminal connected to the input terminal of the optocoupler module.

[0016] In one embodiment, the first switch module further includes:

[0017] A filtering module is provided, one end of which is connected to the base terminal of the first N-type bipolar transistor, and the other end of which is connected to the emitter terminal of the first N-type bipolar transistor. The filtering module is used to filter the host computer control signal.

[0018] In one embodiment, the filtering module includes:

[0019] A first capacitor, one end of which is connected to the base terminal of the first N-type bipolar transistor, and the other end of which is connected to the emitter terminal of the first N-type bipolar transistor.

[0020] The second capacitor has one end connected to the base terminal of the first N-type bipolar transistor, and the other end connected to the emitter terminal of the first N-type bipolar transistor.

[0021] In one embodiment, the optocoupler module includes:

[0022] An optocoupler, wherein the anode of the input side of the optocoupler is used to acquire a base voltage signal, and the cathode of the input side of the optocoupler is connected to the collector terminal of the first N-type bipolar transistor;

[0023] The output collector terminal of the optocoupler is connected to the second switch module, and the output emitter terminal of the optocoupler is grounded.

[0024] In one embodiment, the optocoupler module further includes:

[0025] A current limiting module is provided, one end of which is used to acquire the base voltage signal, and the other end of which is connected to the anode of the input side of the optocoupler. The current limiting module is used to limit the current at the anode of the input side of the optocoupler.

[0026] In one embodiment, the current limiting module includes:

[0027] At least one first resistor, one end of which is used to acquire the base voltage signal, and the other end of which is connected to the anode terminal of the input side of the optocoupler.

[0028] In one embodiment, the second switch module includes:

[0029] The second N-type bipolar transistor has its base terminal connected to the optocoupler module and the power supply, and its emitter terminal grounded.

[0030] The P-type field-effect transistor has its gate connected to the collector of the second N-type bipolar transistor, its source connected to the power supply, and its drain connected to the load.

[0031] In one embodiment, the second switch module further includes:

[0032] A first current-limiting bias module, one end of which is connected to the power supply, and the other end of which is connected to the base terminal of the second N-type bipolar transistor.

[0033] The first current-limiting bias module is used to limit the base current of the second N-type bipolar transistor and to provide a bias voltage to the base of the second N-type bipolar transistor.

[0034] In one embodiment, the first current limiting bias module includes:

[0035] At least one second resistor, one end of which is connected to the power supply, and the other end of which is connected to the base terminal of the second N-type bipolar transistor.

[0036] In one embodiment, the second switch module further includes:

[0037] The second current limiting bias module has a first terminal connected to the collector terminal of the second N-type bipolar transistor, a second terminal connected to the gate terminal of the P-type field-effect transistor, and a third terminal connected to the source terminal of the P-type field-effect transistor and the power supply.

[0038] The second current-limiting bias module is used to limit the gate current of the P-type field-effect transistor and provide a bias voltage to the gate of the P-type field-effect transistor.

[0039] In one embodiment, the second current limiting bias module includes:

[0040] A third resistor, one end of which is connected to the collector terminal of the second N-type bipolar transistor, and the other end of which is connected to the gate terminal of the P-type field-effect transistor;

[0041] A fourth resistor, one end of which is connected to the gate terminal of the P-type field-effect transistor, and the other end of which is connected to the source terminal of the P-type field-effect transistor and the power supply.

[0042] In one embodiment, the second switch module further includes:

[0043] An electrolytic capacitor, wherein the positive terminal of the electrolytic capacitor is connected to the drain terminal of the P-type field-effect transistor and the load, and the negative terminal of the electrolytic capacitor is grounded.

[0044] This application provides a garment processing device, including the power switch control circuit described in any of the above embodiments.

[0045] The beneficial effects of this utility model embodiment compared with the prior art are:

[0046] The power supply can be understood as an external power source. The load can be understood as a component, circuit, or functional module in the lower-level machine that requires power and relies on an external power source for electrical energy. When the power supply provides power to the load, it enables the components, circuits, or functional modules in the lower-level machine to operate normally, thereby achieving the normal operation of the controlled electrical equipment.

[0047] The first switching module is connected to the optocoupler module, which in turn is connected to the second switching module, forming a control circuit for the power supply to the load. The optocoupler module provides electrical isolation between the first and second switching modules, ensuring reliable signal transmission between them while meeting electrical isolation requirements.

[0048] If the first switch module does not receive the control signal from the host computer, it can be understood that the first switch module has not received the control signal from the host computer. Specifically, when the host computer's control signal is affected by electromagnetic interference or is intermittently lost, although the host computer sends the control signal, it cannot reach the first switch module, thus preventing the first switch module from receiving the control signal. Alternatively, if the signal harness terminals connecting the host computer and the first switch module have poor contact or malfunction, the host computer's control signal will also fail to reach the first switch module, preventing the first switch module from receiving the control signal.

[0049] The power switch control circuit provided in this application, in which the first switch module controls the optocoupler module to turn off when no upper-computer control signal is received, allows the second switch module to control the power supply to power the load. This solves the problem of the inability to control the power supply to power the load when the upper-computer control signal is affected by electromagnetic interference, intermittent loss, or poor contact at the signal harness connection terminals. Therefore, when the power supply powers the load, the components, circuits, or functional modules in the lower-level machine that rely on external power are energized, enabling the entire power system in the lower-level machine to be powered, thus ensuring the normal operation of the control system and the controlled electrical equipment. Therefore, the power switch control circuit provided in this application avoids the risk of abnormal operation failure of electrical equipment controlled by the lower-level machine during high-speed operation due to interference, intermittent loss, or poor contact at the upper-computer control signals, improving the safety and reliability of the power switch control circuit. Attached Figure Description

[0050] 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.

[0051] Figure 1 The following are structural block diagrams of the power switch control circuits in some embodiments provided in this application.

[0052] Figure 2 The circuit structure diagram of the power switch control circuit in some embodiments provided in this application is shown.

[0053] Figure 3 A schematic diagram of the circuit structure of the first switch module in some embodiments provided in this application.

[0054] Figure 4 The circuit structure diagram of the optocoupler module is shown in some embodiments provided in this application.

[0055] Figure 5 The circuit structure diagram of the current limiting module is shown in some embodiments provided in this application.

[0056] Figure 6 A schematic diagram of the circuit structure of the second switch module in some embodiments provided in this application.

[0057] Figure 7 A schematic diagram of the circuit structure of the first current limiting bias module in some embodiments provided in this application.

[0058] Figure 8 This is a schematic diagram showing the connection between the voltage provided by the power supply and the voltage obtained by the load in some embodiments provided in this application. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Please see Figure 1 This application provides a power switch control circuit, including a first switch module 10, an optocoupler module 20, and a second switch module 30. The optocoupler module 20 is connected to the first switch module 10, and the second switch module 30 is connected to the optocoupler module 20. The optocoupler module 20 is used to provide electrical signal isolation between the first switch module 10 and the second switch module 30. The second switch module 30 is also used to connect to a power supply and a load.

[0065] The first switch module 10 is used to control the optocoupler module 20 to turn off when no control signal is received from the host computer. The second switch module 30 is used to control the power supply to supply power to the load when the optocoupler module 20 is turned off.

[0066] In this embodiment, the power supply can be understood as an external power supply. The load can be understood as a component, circuit, or functional module in the lower-level machine that requires power, or an electrical device connected and controlled by the lower-level machine that relies on an external power source for electrical energy. When the power supply provides power to the load, it enables the components, circuits, or functional modules in the lower-level machine that require power to operate normally, thereby achieving the normal operation of the controlled electrical device.

[0067] The first switch module 10 is connected to the optocoupler module 20, and the optocoupler module 20 is connected to the second switch module 30, forming a control circuit for the power supply to the load. By setting the optocoupler module 20 to provide electrical isolation between the first switch module 10 and the second switch module 30, the power switch control circuit can meet the electrical isolation requirements while ensuring reliable signal transmission between the first switch module 10 and the second switch module 30.

[0068] If the first switch module 10 does not receive a control signal from the host computer, it can be understood that the first switch module 10 has not received the control signal from the host computer. Specifically, when the host computer's control signal is affected by electromagnetic interference or is intermittently lost, although the host computer sends the control signal, it cannot reach the first switch module 10, thus the first switch module 10 cannot receive the control signal. Alternatively, if the signal harness terminals connecting the host computer and the first switch module 10 have poor contact or malfunction, the host computer's control signal also cannot reach the first switch module 10, preventing the first switch module 10 from receiving the control signal. Or, the host computer may not send a control signal at all, and therefore the first switch module 10 will not receive it.

[0069] In the power switch control circuit provided in this application, the first switch module 10 controls the optocoupler module 20 to turn off when it does not receive a control signal from the host computer. This allows the second switch module 30 to control the power supply to power the load, solving the problem of the inability to control the power supply to power the load when the host computer control signal is affected by electromagnetic interference, intermittent loss, or poor contact at the signal harness connection terminals. Therefore, when the power supply powers the load, the components, circuits, or functional modules in the lower-level machine that require power, or the electrical equipment connected and controlled by the lower-level machine, are powered, enabling the entire power system in the lower-level machine to be powered and thus ensuring the normal operation of the control system and the electrical equipment connected and controlled by the lower-level machine. Therefore, the power switch control circuit provided in this application avoids the risk of abnormal operation failure of electrical equipment controlled by the lower-level machine during high-speed operation due to interference, intermittent loss, or poor contact at the connection terminals of the host computer control signal, improving the safety and reliability of the power switch control circuit.

[0070] In some embodiments of this application, the first switch module 10 is further configured to control the optocoupler module 20 to conduct when a control signal from the host computer is received. The second switch module 30 is further configured to control the power supply to stop supplying power to the load when the optocoupler module 20 is conducted.

[0071] The host computer is used to send host computer control signals to the first switch module 10 when the electrical equipment is in standby or off state.

[0072] In this embodiment, when the electrical device is in standby mode, power consumption needs to be reduced to maintain basic responsiveness. When the electrical device is in power-off mode, the goal is to achieve zero power consumption. Therefore, when the electrical device is in standby or power-off mode, the host computer sends a host computer control signal to the first switch module 10. Upon receiving the host computer control signal, the first switch module 10 controls the optocoupler module 20 to conduct, causing the second switch module 30 to control the power supply to stop supplying power to the load. The second switch module 30 controlling the power supply to stop supplying power to the load causes the entire power system in the lower-level machine to lose power, preventing the components, circuits, or functional modules in the lower-level machine that require power, or the electrical devices connected and controlled by the lower-level machine, from consuming electrical energy, reducing energy waste, and thus lowering power consumption.

[0073] Please see Figure 2 and Figure 3 In some embodiments of this application, the first switching module 10 includes a first N-type bipolar transistor 110. The base terminal of the first N-type bipolar transistor 110 is connected to a host computer. The emitter terminal of the first N-type bipolar transistor 110 is grounded. The collector terminal of the first N-type bipolar transistor 110 is connected to the input terminal of the optocoupler module 20.

[0074] In this embodiment, the base terminal of the first N-type bipolar transistor 110 is connected to the host computer. The emitter terminal of the first N-type bipolar transistor 110 is grounded, making the emitter voltage of the first N-type bipolar transistor 110 zero. Therefore, when the base terminal of the first N-type bipolar transistor 110 does not receive a control signal from the host computer, the base voltage will not exceed the emitter voltage, failing to meet the conduction condition of the first N-type bipolar transistor 110, thus the first N-type bipolar transistor 110 is turned off and does not conduct. When the first N-type bipolar transistor 110 is turned off, the connection between the collector terminal of the first N-type bipolar transistor 110 and the input terminal of the optocoupler module 20 is not connected, thereby turning off the optocoupler module 20, allowing the second switching module 30 to control the power supply to supply power to the load.

[0075] Therefore, when the base terminal of the first N-type bipolar transistor 110 does not receive the host computer control signal sent by the host computer, the first N-type bipolar transistor 110 is turned off, and the optocoupler module 20 is turned off, so that the second switch module 30 controls the power supply to supply power to the load. This solves the problem that the power supply cannot be controlled to supply power to the load when the host computer control signal sent by the host computer is affected by electromagnetic interference, is occasionally lost, or has poor contact at the connection terminal of the signal harness.

[0076] When the host computer receives a control signal from the host computer at the base terminal of the first N-type bipolar transistor 110, the host computer control signal is a high-level signal, causing the base terminal voltage to be greater than the emitter terminal voltage, and satisfying the conduction condition of the first N-type bipolar transistor 110, thus turning on the first N-type bipolar transistor 110. When the first N-type bipolar transistor 110 is turned on, the connection line between the collector terminal of the first N-type bipolar transistor 110 and the input terminal of the optocoupler module 20 is made conductive, thereby turning on the optocoupler module 20, so that the second switching module 30 controls the power supply to stop supplying power to the load.

[0077] Therefore, when the host computer receives the host computer control signal sent by the host computer at the base terminal of the first N-type bipolar transistor 110, the first N-type bipolar transistor 110 is turned on and controls the optocoupler module 20 to be turned on, so that the second switch module 30 controls the power supply to stop supplying power to the load. This avoids the consumption of power by components, circuits, or functional modules in the lower-level machine or electrical equipment connected and controlled by the lower-level machine when the electrical equipment is in standby or off state, thereby reducing energy waste and power consumption.

[0078] In some embodiments of this application, the first switching module 10 further includes a filtering module 120. One end of the filtering module 120 is connected to the base terminal of the first N-type bipolar transistor 110, and the other end of the filtering module 120 is connected to the emitter terminal of the first N-type bipolar transistor 110. The filtering module 120 is used to filter the host computer control signal.

[0079] In this embodiment, the filter module 120 is connected between the base and emitter terminals of the first N-type bipolar transistor 110, and the other end of the filter module 120 is grounded. The filter module 120 can introduce high-frequency components of the host computer control signal to the ground terminal, making the host computer control signal reaching the base terminal of the first N-type bipolar transistor 110 more stable. This ensures the normal conduction or cutoff of the first N-type bipolar transistor 110, improving the stability and reliability of the power switch control circuit.

[0080] In some embodiments of this application, the filter module 120 includes a first capacitor 121 and a second capacitor 122. One end of the first capacitor 121 is connected to the base terminal of the first N-type bipolar transistor 110. The other end of the first capacitor 121 is connected to the emitter terminal of the first N-type bipolar transistor 110.

[0081] One end of the second capacitor 122 is connected to the base terminal of the first N-type bipolar transistor 110. The other end of the second capacitor 122 is connected to the emitter terminal of the first N-type bipolar transistor 110.

[0082] In this embodiment, the first capacitor 121 and the second capacitor 122 are connected in parallel between the base and emitter terminals of the first N-type bipolar transistor 110 and are grounded. Through the first capacitor 121 and the second capacitor 122, high-frequency components in the host computer control signal can be introduced to the ground terminal, making the host computer control signal reaching the base terminal of the first N-type bipolar transistor 110 more stable, effectively improving the circuit's anti-interference capability, stability, and signal quality.

[0083] Furthermore, by connecting the first capacitor 121 and the second capacitor 122 in parallel, different capacitor parameters result in different impedances for signals of different frequencies, which can broaden the filtering frequency band and improve the filtering effect. The capacitor parameters of the first capacitor 121 and the second capacitor 122 can be adjusted according to the actual application scenario to match the connection circuit between the host computer and the first N-type bipolar transistor 110.

[0084] Please see Figure 4 In some embodiments of this application, the optocoupler module 20 includes an optocoupler 210. The anode input of the optocoupler 210 is used to acquire a base voltage signal. The cathode input of the optocoupler 210 is connected to the collector terminal of the first N-type bipolar transistor 110.

[0085] The collector terminal of the output side of the optocoupler 210 is connected to the second switch module 30. The emitter terminal of the output side of the optocoupler 210 is grounded.

[0086] In this embodiment, the base voltage signal provides the required voltage +5V to the anode terminal of the input side of the optocoupler 210. The voltage of the base voltage signal can be adjusted according to the actual application scenario, as long as it can provide the required voltage to the component. The anode terminal of the input side of the optocoupler 210 can be understood as the anode terminal of the light-emitting diode on the input side of the optocoupler 210. The cathode terminal of the input side of the optocoupler 210 can be understood as the cathode terminal of the light-emitting diode on the input side of the optocoupler 210. The collector terminal of the output side of the optocoupler 210 can be understood as the collector terminal of the phototransistor on the output side of the optocoupler 210. The emitter terminal of the output side of the optocoupler 210 can be understood as the emitter terminal of the phototransistor on the output side of the optocoupler 210.

[0087] The input-side cathode of the optocoupler 210 is connected to the collector of the first N-type bipolar transistor 110. When the first N-type bipolar transistor 110 is turned on, since its emitter is grounded, a path is formed between the anode and cathode of the LED on the input side of the optocoupler 210. Current flows from +5V and through the LED on the input side of the optocoupler 210 and the collector and emitter of the first N-type bipolar transistor 110 to ground. Furthermore, when the first N-type bipolar transistor 110 is turned on, the LED on the input side of the optocoupler 210 operates normally, generating an optical signal.

[0088] After the phototransistor on the output side of the optocoupler 210 receives the optical signal, the base of the phototransistor generates photogenerated carriers, which makes the collector and emitter of the phototransistor conduct, thereby enabling the second switching module 30 to be grounded through the collector and emitter terminals on the output side of the optocoupler 210.

[0089] When the first N-type bipolar transistor 110 is turned off, a path cannot be formed between the anode and cathode terminals of the light-emitting diode on the input side of the optocoupler 210, and the light-emitting diode on the input side of the optocoupler 210 does not work. Consequently, the phototransistor on the output side of the optocoupler 210 is turned off and does not conduct, thus preventing the second switching module 30 from being grounded through the collector and emitter terminals on the output side of the optocoupler 210.

[0090] The optocoupler 210, through the conversion mechanism between electrical signals, optical signals, and electrical signals, can achieve electrical isolation between the first switch module 10 and the second switch module 30 while transmitting signals, thereby improving the anti-interference capability of the power switch control circuit and playing a safety protection role.

[0091] In some embodiments of this application, the optocoupler module 20 further includes a current limiting module 220. One end of the current limiting module 220 is used to acquire a base voltage signal. The other end of the current limiting module 220 is connected to the anode terminal of the input side of the optocoupler 210. The current limiting module 220 is used to limit the current at the anode terminal of the input side of the optocoupler 210.

[0092] In this embodiment, the current limiting module 220 is connected between the base voltage signal and the input anode of the optocoupler 210 to limit the current input to the anode of the light-emitting diode, thereby preventing damage to the input light-emitting diode of the optocoupler 210 and ensuring the safe and stable operation of the optocoupler module 20.

[0093] Please see Figure 5In some embodiments of this application, the current limiting module 220 includes at least one first resistor 221. One end of the first resistor 221 is used to acquire a base voltage signal. The other end of the first resistor 221 is connected to the anode terminal of the input side of the optocoupler 210.

[0094] In this embodiment, the number of first resistors 221 in the current limiting module 220 can be set according to the actual application scenario, and can be one or more. Through the first resistors 221, the basic voltage signal can be divided, thereby achieving the current limiting function, so that the light-emitting diode on the input side of the optocoupler 210 can light up and operate normally, playing a role in flexibly adjusting the voltage and protecting the circuit components.

[0095] In some embodiments of this application, the current limiting module 220 includes two first resistors 221. The two first resistors 221 are connected in series between the base voltage signal and the anode terminal of the input side of the optocoupler 210.

[0096] Please see Figure 6 In some embodiments of this application, the second switching module 30 includes a second N-type bipolar transistor 310 and a P-type field-effect transistor 320. The base terminal of the second N-type bipolar transistor 310 is connected to the optocoupler module 20 and the power supply. The emitter terminal of the second N-type bipolar transistor 310 is grounded.

[0097] The gate of the P-type field-effect transistor 320 is connected to the collector of the second N-type bipolar transistor 310. The source of the P-type field-effect transistor 320 is connected to the power supply. The drain of the P-type field-effect transistor 320 is connected to the load.

[0098] In this embodiment, the base terminal of the second N-type bipolar transistor 310 is connected to the optocoupler module 20 and the power supply. When the optocoupler module 20 is off, the power supply provides voltage to the base terminal of the second N-type bipolar transistor 310. The emitter terminal of the second N-type bipolar transistor 310 is grounded, meaning the emitter voltage of the second N-type bipolar transistor 310 is zero. The base voltage of the second N-type bipolar transistor 310 is greater than the emitter voltage, satisfying the conduction condition of the second N-type bipolar transistor 310, thus turning on the second N-type bipolar transistor 310.

[0099] Furthermore, when the second N-type bipolar transistor 310 is turned on, the collector and emitter terminals of the second N-type bipolar transistor 310 are connected, causing the gate terminal of the P-type field-effect transistor 320 to be grounded through the collector and emitter terminals of the second N-type bipolar transistor 310, thus lowering the gate terminal voltage of the P-type field-effect transistor 320. The power supply provides voltage to the source terminal of the P-type field-effect transistor 320. Therefore, the gate terminal voltage of the P-type field-effect transistor 320 is less than the source terminal voltage, satisfying the conduction condition of the P-type field-effect transistor 320, causing the P-type field-effect transistor 320 to conduct. When the P-type field-effect transistor 320 is turned on, the source and drain terminals of the P-type field-effect transistor 320 are connected, thereby establishing a power supply line between the power supply and the load, allowing the power supply to supply power to the load.

[0100] Therefore, when the base of the first N-type bipolar transistor 110 does not receive the host computer control signal sent by the host computer, the first N-type bipolar transistor 110 is turned off, and the optocoupler module 20 is turned off, so that the second N-type bipolar transistor 310 and the P-type field-effect transistor 320 are both turned on, controlling the power supply to supply power to the load. This solves the problem that the power supply cannot be controlled to supply power to the load when the host computer control signal sent by the host computer is affected by electromagnetic interference, is occasionally lost, or has poor contact at the connection terminal of the signal harness.

[0101] When the optocoupler module 20 is turned on, the base terminal of the second N-type bipolar transistor 310 is grounded through the phototransistor in the optocoupler module 20, which lowers the base terminal voltage of the second N-type bipolar transistor 310, making it impossible for the second N-type bipolar transistor 310 to meet the conduction condition, thus controlling the second N-type bipolar transistor 310 to be turned off and not conduct.

[0102] Furthermore, when the second N-type bipolar transistor 310 is turned off, its collector terminal is connected to the gate terminal of the P-type field-effect transistor 320, causing the gate terminal of the P-type field-effect transistor 320 to be floating. This prevents the P-type field-effect transistor 320 from being turned on, thus turning it off and preventing it from conducting. With the P-type field-effect transistor 320 off, it is impossible to make contact between its source and drain terminals, thereby disconnecting the power supply line between the power source and the load, and stopping the power supply from supplying power to the load.

[0103] Therefore, when the host computer receives the host computer control signal sent by the host computer at the base terminal of the first N-type bipolar transistor 110, the host computer control signal is a high-level signal, which turns on the first N-type bipolar transistor 110 and controls the optocoupler module 20 to turn on, so that the second N-type bipolar transistor 310 and the P-type field-effect transistor 320 are both turned off, and the power supply stops supplying power to the load. This avoids the consumption of power by components, circuits, or functional modules in the lower-level machine or electrical equipment connected and controlled by the lower-level machine when the electrical equipment is in standby or off state, thereby reducing energy waste and lowering power consumption.

[0104] In some embodiments of this application, the base terminal of the second N-type bipolar transistor 310 is connected to the output collector terminal of the optocoupler 210 and the power supply.

[0105] In this embodiment, the base terminal of the second N-type bipolar transistor 310 is connected to the output collector terminal of the optocoupler 210. When the optocoupler 210 is turned off, the phototransistor on the output side of the optocoupler 210 is not conducting and cannot be grounded. Furthermore, when the optocoupler 210 is turned off, the power supply provides voltage to the base terminal of the second N-type bipolar transistor 310, causing the second N-type bipolar transistor 310 to conduct. Therefore, when the base terminal of the first N-type bipolar transistor 110 does not receive a control signal from the host computer, the first N-type bipolar transistor 110 is turned off, controlling the optocoupler 210 to turn off, causing both the second N-type bipolar transistor 310 and the P-type field-effect transistor 320 to conduct, controlling the power supply to supply power to the load.

[0106] When optocoupler 210 is turned on, the phototransistor on the output side of optocoupler 210 is turned on, causing the base terminal of the second N-type bipolar transistor 310 to be grounded through the phototransistor. This pulls down the base terminal voltage of the second N-type bipolar transistor 310, preventing it from meeting the turn-on condition and causing it to turn off. Therefore, when the base terminal of the first N-type bipolar transistor 110 receives a control signal from the host computer, the first N-type bipolar transistor 110 turns on and controls optocoupler 210 to turn on, causing both the second N-type bipolar transistor 310 and the P-type field-effect transistor 320 to turn off, thus stopping the power supply from supplying power to the load.

[0107] In some embodiments of this application, the second switching module 30 further includes a first current-limiting bias module 330. One end of the first current-limiting bias module 330 is connected to a power supply. The other end of the first current-limiting bias module 330 is connected to the base terminal of the second N-type bipolar transistor 310.

[0108] The first current-limiting bias module 330 is used to limit the base current of the second N-type bipolar transistor 310 and provide a bias voltage to the base of the second N-type bipolar transistor 310.

[0109] In this embodiment, the first current-limiting bias module 330 is connected between the power supply and the base terminal of the second N-type bipolar transistor 310, and also between the power supply and the collector terminal of the output-side phototransistor of the optocoupler 210. The first current-limiting bias module 330 limits the current in the circuit, preventing excessive current from damaging the second N-type bipolar transistor 310 and the optocoupler 210, thus protecting them.

[0110] Furthermore, the first current-limiting bias module 330 can divide the voltage provided by the power supply to provide a base bias voltage for the second N-type bipolar transistor 310 to conduct, so that the second N-type bipolar transistor 310 meets the conduction conditions and can operate normally.

[0111] Please see Figure 7 In some embodiments of this application, the first current-limiting bias module 330 includes at least one second resistor 331. One end of the second resistor 331 is connected to a power supply. The other end of the second resistor 331 is connected to the base terminal of the second N-type bipolar transistor 310.

[0112] In this embodiment, the number of second resistors 331 in the first current-limiting bias module 330 can be set according to the actual application scenario, and can be one or more. The second resistors 331 can divide the voltage provided by the power supply, thereby achieving current limiting and providing bias voltage. By setting the number of second resistors 331, the first current-limiting bias module 330 can flexibly adjust the voltage and protect circuit components.

[0113] In some embodiments of this application, the first current-limiting bias module 330 includes two second resistors 331. The two second resistors 331 are connected in series between the power supply and the base terminal of the second N-type bipolar transistor 310, and are also connected in series between the power supply and the collector terminal of the output-side phototransistor of the optocoupler 210.

[0114] In some embodiments of this application, the second switching module 30 further includes a second current-limiting bias module 340. A first terminal of the second current-limiting bias module 340 is connected to the collector terminal of the second N-type bipolar transistor 310. A second terminal of the second current-limiting bias module 340 is connected to the gate terminal of the P-type field-effect transistor 320. A third terminal of the second current-limiting bias module 340 is connected to the source terminal of the P-type field-effect transistor 320 and a power supply.

[0115] The second current-limiting bias module 340 is used to limit the gate current of the P-type field-effect transistor 320 and provide a bias voltage to the gate of the P-type field-effect transistor 320.

[0116] In this embodiment, when the second N-type bipolar transistor 310 is turned on, the collector and emitter terminals of the second N-type bipolar transistor 310 are connected, so that the gate terminal of the P-type field-effect transistor 320 is grounded through the second terminal and the first terminal of the second current-limiting bias module 340 and the second N-type bipolar transistor 310, thereby lowering the gate terminal voltage of the P-type field-effect transistor 320.

[0117] The power supply provides voltage to the third terminal of the second current-limiting bias module 340 and the source terminal of the P-type field-effect transistor 320. The power supply, the second current-limiting bias module 340, and the second N-type bipolar transistor 310 form a connection line and are grounded through the emitter terminal of the second N-type bipolar transistor 310.

[0118] The power supply, the source and drain terminals of the P-type field-effect transistor 320, and the load form another connection line. The gate voltage of the P-type field-effect transistor 320 is the voltage of the second terminal of the second current-limiting bias module 340. When the second N-type bipolar transistor 310 is turned on, the gate voltage of the P-type field-effect transistor 320 is pulled down, making it lower than the source voltage of the P-type field-effect transistor 320, thus turning it on. When the P-type field-effect transistor 320 is turned on, the source and drain terminals of the P-type field-effect transistor 320 are connected, thereby establishing a power supply line between the power supply and the load, allowing the power supply to supply power to the load.

[0119] Thus, by limiting the gate current of the P-type field-effect transistor 320 and the collector current of the second N-type bipolar transistor 310 in the circuit through the second current-limiting bias module 340, the P-type field-effect transistor 320 and the second N-type bipolar transistor 310 are protected, and excessive current is avoided from damaging the P-type field-effect transistor 320 and the second N-type bipolar transistor 310.

[0120] Furthermore, the voltage at the second terminal of the second current limiting bias module 340 provides a bias voltage to the gate terminal of the P-type field-effect transistor 320, so that the P-type field-effect transistor 320 meets the conduction conditions and can operate normally.

[0121] In some embodiments of this application, the second current-limiting bias module 340 includes a third resistor 341 and a fourth resistor 342. One end of the third resistor 341 is connected to the collector terminal of the second N-type bipolar transistor 310. The other end of the third resistor 341 is connected to the gate terminal of the P-type field-effect transistor 320.

[0122] One end of the fourth resistor 342 is connected to the gate terminal of the P-type field-effect transistor 320. The other end of the fourth resistor 342 is connected to the source terminal of the P-type field-effect transistor 320 and the power supply.

[0123] In this embodiment, the third resistor 341 is connected between the gate of the P-type field-effect transistor 320 and the collector of the second N-type bipolar transistor 310. The fourth resistor 342 is connected between the gate of the P-type field-effect transistor 320 and the power supply. Through the third resistor 341 and the fourth resistor 342, the voltage provided by the power supply can be divided, thereby achieving current limiting and providing bias voltage. The resistance parameters of the third resistor 341 and the fourth resistor 342 can be adjusted according to the actual application scenario, flexibly achieving the functions of current limiting and providing bias voltage, and protecting the P-type field-effect transistor 320 and the second N-type bipolar transistor 310.

[0124] In some embodiments of this application, the second switching module 30 further includes an electrolytic capacitor 350. The positive terminal of the electrolytic capacitor 350 is connected to the drain terminal of the P-type field-effect transistor 320 and the load. The negative terminal of the electrolytic capacitor 350 is grounded.

[0125] In this embodiment, the electrolytic capacitor 350 has the advantages of high capacity and low cost, which can meet the energy storage requirements. When the P-type field-effect transistor 320 is turned on, the electrolytic capacitor 350 is charged through the drain terminal of the P-type field-effect transistor 320. The electrolytic capacitor 350 realizes the function of charging and energy storage. When the P-type field-effect transistor 320 is turned off, the electrolytic capacitor 350 discharges to provide a continuous current to the load, avoiding a sudden voltage drop caused by the power supply stopping, thus protecting the load.

[0126] Furthermore, at the moment the P-type field-effect transistor 320 switches, the electrolytic capacitor 350 can absorb energy through charging, preventing the spike from damaging the load and the P-type field-effect transistor 320, thus protecting the load and the P-type field-effect transistor 320.

[0127] Please see Figure 8In some embodiments of this application, the power supply provides an H18V voltage, which is supplied to one end of the second resistor 331, the other end of the fourth resistor 342, and the source terminal of the P-type field-effect transistor 320. When the P-type field-effect transistor 320 is turned on, the H18V voltage provided by the power supply reaches the load through the P-type field-effect transistor 320, providing an H18V' voltage to the load. The voltage amplitude provided by the power supply can be adjusted according to the actual application scenario.

[0128] This application provides a garment processing device, including a power switch control circuit of any one of the above embodiments.

[0129] 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.

[0130] The number and performance parameters of components such as resistors, capacitors, transistors, and optocouplers in the power switch control circuit provided in this application can be adjusted according to the actual application scenario, as long as they can realize the functions of each module in this application. The amplitude of the power supply connected to each component can also be set according to the actual application scenario, as long as it can provide the required voltage to the component.

[0131] 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.

[0132] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not described in detail or in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. 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.

[0133] The division into 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 coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0134] The units described as separate components may or may not be physically separate. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs. Furthermore, the functional units in the various embodiments of this application 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 units described above can be implemented in hardware or as software functional units.

[0135] 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.

[0136] The embodiments described above are only used to illustrate the technical solutions of this application, and are not intended to limit it. 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; and these 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 power switch control circuit, characterized in that, include: First switch module (10); The optocoupler module (20) is connected to the first switch module (10); The second switch module (30) is connected to the optocoupler module (20). The optocoupler module (20) is used to provide electrical signal isolation between the first switch module (10) and the second switch module (30). The second switch module (30) is also used to connect to the power supply and the load. The first switch module (10) is used to control the optocoupler module (20) to turn off when no control signal from the host computer is received; The second switch module (30) is used to control the power supply to supply power to the load when the optocoupler module (20) is turned off.

2. The power switch control circuit as described in claim 1, characterized in that, The first switch module (10) is also used to control the optocoupler module (20) to turn on when the host computer control signal is received; The second switch module (30) is also used to control the power supply to stop supplying power to the load when the optocoupler module (20) is turned on; The host computer is used to send a host computer control signal to the first switch module (10) when the electrical equipment is in standby or off state.

3. The power switch control circuit as described in claim 1 or claim 2, characterized in that, The first switch module (10) includes: A first N-type bipolar transistor (110) is used, the base terminal of which is connected to the host computer, the emitter terminal of which is grounded, and the collector terminal of which is connected to the input terminal of the optocoupler module (20).

4. The power switch control circuit as described in claim 3, characterized in that, The first switch module (10) further includes: A filtering module (120) is provided, one end of which is connected to the base terminal of the first N-type bipolar transistor (110), and the other end of which is connected to the emitter terminal of the first N-type bipolar transistor (110). The filtering module (120) is used to filter the host computer control signal.

5. The power switch control circuit as described in claim 4, characterized in that, The filtering module (120) includes: A first capacitor (121) is connected at one end to the base terminal of the first N-type bipolar transistor (110), and at the other end to the emitter terminal of the first N-type bipolar transistor (110). The second capacitor (122) has one end connected to the base terminal of the first N-type bipolar transistor (110) and the other end connected to the emitter terminal of the first N-type bipolar transistor (110).

6. The power switch control circuit as described in any one of claims 3 to 5, characterized in that, The optocoupler module (20) includes: An optocoupler (210) is provided, wherein the anode of the optocoupler (210) is used to acquire a base voltage signal, and the cathode of the optocoupler (210) is connected to the collector of the first N-type bipolar transistor (110). The output collector terminal of the optocoupler (210) is connected to the second switch module (30), and the output emitter terminal of the optocoupler (210) is grounded.

7. The power switch control circuit as described in claim 6, characterized in that, The optocoupler module (20) also includes: A current limiting module (220) is provided, one end of which is used to acquire the base voltage signal, and the other end of which is connected to the anode of the input side of the optocoupler (210). The current limiting module (220) is used to limit the current at the anode of the input side of the optocoupler (210).

8. The power switch control circuit as described in claim 7, characterized in that, The current limiting module (220) includes: At least one first resistor (221) is provided, one end of which is used to acquire the base voltage signal, and the other end of which is connected to the anode of the input side of the optocoupler (210).

9. The power switch control circuit as described in any one of claims 1 to 8, characterized in that, The second switch module (30) includes: The second N-type bipolar transistor (310) has its base terminal connected to the optocoupler module (20) and the power supply, and its emitter terminal grounded. A P-type field-effect transistor (320) is provided, wherein the gate terminal of the P-type field-effect transistor (320) is connected to the collector terminal of the second N-type bipolar transistor (310), the source terminal of the P-type field-effect transistor (320) is connected to the power supply, and the drain terminal of the P-type field-effect transistor (320) is connected to the load.

10. The power switch control circuit as described in claim 9, characterized in that, The second switch module (30) also includes: A first current limiting bias module (330) is provided, one end of which is connected to the power supply, and the other end of which is connected to the base terminal of the second N-type bipolar transistor (310). The first current limiting bias module (330) is used to limit the base current of the second N-type bipolar transistor (310) and provide a bias voltage to the base of the second N-type bipolar transistor (310).

11. The power switch control circuit as described in claim 10, characterized in that, The first current limiting bias module (330) includes: At least one second resistor (331) is provided, one end of which is connected to the power supply and the other end of which is connected to the base terminal of the second N-type bipolar transistor (310).

12. The power switch control circuit as described in any one of claims 9 to 11, characterized in that, The second switch module (30) also includes: The second current limiting bias module (340) has its first end connected to the collector terminal of the second N-type bipolar transistor (310), its second end connected to the gate terminal of the P-type field-effect transistor (320), and its third end connected to the source terminal of the P-type field-effect transistor (320) and the power supply. The second current limiting bias module (340) is used to limit the gate current of the P-type field-effect transistor (320) and provide a bias voltage to the gate of the P-type field-effect transistor (320).

13. The power switch control circuit as described in claim 12, characterized in that, The second current limiting bias module (340) includes: A third resistor (341) is connected at one end to the collector terminal of the second N-type bipolar transistor (310), and at the other end to the gate terminal of the P-type field-effect transistor (320). A fourth resistor (342) is provided, one end of which is connected to the gate terminal of the P-type field-effect transistor (320), and the other end of which is connected to the source terminal of the P-type field-effect transistor (320) and the power supply.

14. The power switch control circuit as described in any one of claims 9 to 13, characterized in that, The second switch module (30) also includes: An electrolytic capacitor (350) is provided, with its positive terminal connected to the drain terminal of the P-type field-effect transistor (320) and the load, and its negative terminal grounded.

15. A garment processing device, characterized in that, Includes the power switch control circuit according to any one of claims 1 to 14.

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