CN219123118U

CN219123118U - Switching circuit and switching device comprising a switching circuit

Info

Publication number: CN219123118U
Application number: CN202223280439.3U
Authority: CN
Inventors: 马科
Original assignee: Zhejiang Yieryi Electric Manufacturing Co ltd
Current assignee: Zhejiang Yieryi Electric Manufacturing Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-02
Anticipated expiration: 2032-12-08

Abstract

The present disclosure provides a switching circuit including a power input module configured to input an external power source; a voltage conversion module configured to convert a voltage input thereto into an operating voltage; a control module configured to generate an on control signal or an off control signal; and a power supply output module configured to output the external power supply in response to the on control signal, and further configured to block the output of the external power supply in response to the off control signal. When the switch circuit is used, the connection method of the input fire wire end and the output fire wire end is not needed to be distinguished. In addition, the disclosure also provides a switching device comprising the switching circuit.

Description

Switching circuit and switching device comprising a switching circuit

Technical Field

The present disclosure relates to the field of electrical appliances, and more particularly, to a switching circuit and a switching device including the same.

Background

A switch box (e.g., 86-type switch box) is a common device that is connected to and powers an appliance (e.g., a lamp) for home or industrial use by an ac input, and thus an output. The switch box is provided with a switch, and a user can control whether the electric appliance works or not by controlling the switch. The terminals of the switch box typically include an input live terminal, an output live terminal, and a neutral terminal. When in use, the live wire and the zero wire in the alternating current are respectively connected to the input live wire end and the zero wire end of the switch box, and the output live wire end and the zero wire end of the switch box are connected to a using electric appliance to form a power supply loop. The input fire wire end of the switch box must be connected with the fire wire, the output fire wire end must be connected with the using electric appliance, otherwise, the switch box cannot work. Therefore, manufacturers often use different colored leads to distinguish between an incoming or outgoing lead end. However, in practical use, the user still has a problem that the input live wire end and the output live wire end cannot be distinguished, and thus the switch box is wrongly connected.

Disclosure of Invention

In order to solve the above problems and disadvantages, the present disclosure provides a switching circuit and a switching device including the same. When the switch circuit or the switch device is used, the connection method of the input fire wire end and the output fire wire end is not needed to be distinguished.

Based on this, according to an embodiment of the present disclosure, there is provided a switching circuit characterized by comprising: a power input module configured to input an external power, the power input module including a first input circuit from a first fire wire end and a second input circuit from a second fire wire end; a voltage conversion module coupled to the power input module, the voltage conversion module configured to convert a voltage input thereto into an operating voltage; a control module coupled to the voltage conversion module to obtain the operating voltage, the control module configured to generate an on control signal or an off control signal; and a power output module coupled to the control module, the power output module configured to cause the first and second terminals to be turned on in response to the turn-on control signal to output the external power source, and further configured to cause the first and second terminals to be turned off in response to the turn-off control signal to prevent the external power source from being output, wherein the first input circuit includes a first diode capable of causing a voltage to be transmitted from the first terminal to the voltage conversion module, the second input circuit includes a second diode capable of causing a voltage to be transmitted from the second terminal to the voltage conversion module, and the external power source is a zero line.

By using the switching circuit of this embodiment, the hot wire in the alternating current can be connected to either one of the first hot wire end and the second hot wire end, and the neutral wire in the alternating current is connected to the neutral wire end, thereby providing an input of an external power supply to the switching circuit. The other ends of the first and second live wire ends and the neutral wire end in the switching circuit are connected to the electric appliance to supply power to the electric appliance. By controlling the control module on the switching circuit, whether the electric appliance is in operation or not can be controlled.

In one embodiment, the switching circuit is configured to input the external power from the first hot terminal and output the external power from the second hot terminal, the switching circuit further configured to input the external power from the second hot terminal and output the external power from the first hot terminal.

In one embodiment, the switching circuit further comprises a filtering module coupled to the power input module and the voltage conversion module.

In one embodiment, the control module includes: a WiFi unit configured to generate at least a first WiFi signal and a second WiFi signal; a key unit configured to generate at least a first key signal and a second key signal; a processing unit coupled to the WiFi unit and the key unit, respectively, the processing unit configured to generate the on control signal in response to the first WiFi signal or the first key signal, and further configured to generate the off control signal in response to the second WiFi signal or the second key signal.

In one embodiment, the power input module further comprises a current regulator configured to regulate a current of the first input circuit or the second input circuit.

In one embodiment, the power input module further comprises a varistor connected in parallel between the first live and neutral terminals or between the second live and neutral terminals and a fuse connected in series in the first or second input circuits, respectively, the varistor and the fuse being configured to protect against surge overvoltage.

In one embodiment, the power input module further comprises a safety capacitor connected in parallel between the first live wire end and the neutral wire end or between the second live wire end and the neutral wire end.

In one embodiment, the power input module further comprises at least one resistor connected in parallel between the first hot wire end and the neutral wire end or between the second hot wire end and the neutral wire end.

In one embodiment, the power output module includes: a semiconductor element including an input terminal and an output terminal, the input terminal coupled to the control module to receive the on control signal or the off control signal; a control element, including a control end, a first end, and a second end, wherein the control end is used for controlling the on-off between the first end and the second end, the control end is coupled to the output end of the semiconductor element, the first end is coupled to the first fire wire end, and the second end is coupled to the second fire wire end.

In one embodiment, the semiconductor element is an optocoupler thyristor or a pure thyristor, and the control element is a thyristor or a relay.

According to another embodiment of the present disclosure, there is provided a switching device comprising a switching circuit of any one of the embodiments described above.

Drawings

The embodiments are shown and described with reference to the drawings. The drawings serve to illustrate the basic principles and thus only show aspects necessary for understanding the basic principles. The figures are not to scale. In the drawings, like reference numerals refer to like features.

FIG. 1 shows a circuit schematic of a switching circuit according to one embodiment of the present disclosure;

fig. 2 shows a schematic diagram of a control module in a switching circuit according to one embodiment of the present disclosure.

Detailed Description

In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the utility model may be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the utility model. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present utility model. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present utility model is defined by the appended claims.

Fig. 1 shows a schematic diagram of a switching circuit according to one embodiment of the present disclosure. The switching circuit 10 includes a power input module 100, a voltage conversion module 102, a control module 104, and a power output module 106.

The power input module 100 is configured to input an external power source that is a single-phase zero line, such as 220V ac or 110V ac. The power input module 100 includes a first input circuit from a first hot terminal L1 and a second input circuit from a second hot terminal L2. Wherein the first input circuit comprises a rectifier diode D1 enabling a voltage transfer from the first hot wire end L1 to the voltage conversion module 102 and the second input circuit comprises a rectifier diode D4 enabling a voltage transfer from the second hot wire end L2 to the voltage conversion module 102. In use, a neutral with ac power may be connected to the neutral terminal N and the first neutral terminal L1 to provide power, and also to the neutral terminal N and the second neutral terminal L2 to provide power.

Optionally, the power input module 100 further comprises a current regulator configured to regulate the current of the first input circuit or the second input circuit. As shown in fig. 1, the resistor R10 is provided on a common branch of the first input circuit and the second input circuit, and thus can limit the current of the first input circuit and the current of the second input circuit, and prevent the current flowing when the surge overvoltage occurs from being excessively large. In other examples, resistors may also be provided on respective branches of the first input circuit or the second input circuit to limit the current of the first input circuit or the second input circuit, respectively. In other examples, the current regulator may be a resistor, or may be other current regulating circuits or components.

Optionally, the power input module 100 further includes a varistor RV1 connected in parallel between the first live terminal L1 and the neutral terminal N and a fuse F1 correspondingly connected in series in the first input circuit. The varistor RV1 and the fuse F1 are configured to protect against surge overvoltage. When surge overvoltage occurs between the first live wire end L1 and the neutral wire end N, the varistor RV1 becomes larger with the voltage across the varistor RV1, and its own resistance becomes smaller, so that the current passing through itself increases. When the current through the varistor RV1 is too high, the fuse F1 blows, thereby protecting the subsequent circuit module. In other examples, the power input module 100 may further include a varistor connected in parallel between the second live terminal L2 and the neutral terminal N and a fuse correspondingly connected in series in the second input circuit.

Optionally, the power input module 100 further includes a safety capacitor CX1 connected in parallel between the first hot terminal L1 and the neutral terminal N. The safety capacitor CX1 can filter out a part of the high-frequency voltage in the circuit, and reduce the conduction of electromagnetic interference in the switching circuit 10. In other examples, the power input module 100 may further include a safety capacitor connected in parallel between the second hot terminal L2 and the neutral terminal N.

Optionally, the power input module 100 further includes a resistor connected in parallel between the first hot terminal L1 and the neutral terminal N. Preferably, when the capacitance of the safety capacitor CX1 is greater than 0.1 microfarads, two resistors (R7 and R8) may be used in parallel between the first live wire end L1 and the neutral wire end N. After the external power supply is powered off, the resistors (R7 and R8) can discharge the electric quantity stored on the safety capacitor CX1. In other examples, the power input module 100 further includes at least one resistor connected in parallel between the second hot terminal L2 and the neutral terminal N.

The voltage conversion module 102 of the switching circuit 10 is coupled to the power input module 100, which is configured to convert a voltage input thereto into an operating voltage such as direct current. It is noted that "coupled" in this disclosure includes direct or indirect connection between chips, circuits, or modules. The voltage conversion module 102 may be an AC to DC chip or circuit.

The control module 104 of the switching circuit 10 is coupled to the voltage conversion module 102 to obtain an operating voltage, which is configured to generate an on control signal or an off control signal. FIG. 2 illustrates a schematic diagram of a control module according to one embodiment of the present disclosure. The control module 104 includes a WiFi unit 1041, a key unit 1042, and a processing unit 1043, wherein the processing unit 1043 is coupled to the WiFi unit 1041 and the key unit 1042, respectively. The WiFi unit 1041 is configured to generate at least a first WiFi signal and a second WiFi signal in response to a remote instruction of a user. The key unit 1042 is configured to generate at least a first key signal and a second key signal in response to a key operation by a user. The processing unit 1043, such as a single chip microcomputer, is configured to generate an on control signal in response to a first WiFi signal or a first key signal, and is further configured to generate an off control signal in response to a second WiFi signal or a second key signal.

The power output module 106 of the switching circuit 10 is coupled to the control module 104 and is configured to cause the first and second fire wire ends L1 and L2 to be turned on in response to the turn-on control signal to output an external power supply, and is further configured to cause the first and second fire wire ends L1 and L2 to be turned off in response to the turn-off control signal to prevent the external power supply from being output. Referring to fig. 1, the power supply output module 106 may include a semiconductor element U6 and a control element TR1. The semiconductor element U6 includes an input terminal and an output terminal, the input terminal of which is coupled to the control module 104 to receive an on control signal or an off control signal. The control element TR1 includes a control end, a first end, and a second end, where the control end is used to control on-off between the first end and the second end. The control terminal of the control element TR1 is coupled to the output terminal of the semiconductor element U6, the first terminal is coupled to the first firing line terminal L1, and the second terminal is coupled to the second firing line terminal L2. In this embodiment, the semiconductor device U6 is an optocoupler thyristor, and the control device TR1 is a thyristor. When the user selects to turn on the switching circuit 10, the control module 104 sends an on control signal such as a low level to the input terminal of the optocoupler thyristor, and the output terminal thereof sends a trigger voltage or current to the control terminal of the thyristor through photoelectric conversion of the optocoupler thyristor. After receiving the trigger voltage or current, the control end (i.e. the gate) of the thyristor conducts the first end and the second end, so that the first fire wire end L1 is connected with the second fire wire end L2. Conversely, when the user selects to turn off the switching circuit 10, the control module 104 sends an off control signal, such as a high level, to the input of the optocoupler, where the diode will not generate a trigger voltage due to the turn-off effect. Therefore, the first end and the second end of the thyristor remain cut-off under the condition that the trigger voltage is not received, so that the first fire wire end L1 is disconnected from the second fire wire end L2. In other examples, the semiconductor element U6 may be a pure thyristor and the control element TR1 may be a relay.

Optionally, the switching circuit 10 further comprises a filtering module 108 coupled to the power input module 100 and the voltage conversion module 102. The filter module 108 may be a pi filter circuit, an LC filter circuit, or other types of filter chips and circuits. The filter module 108 is configured to suppress electromagnetic interference conduction of the switch circuit 10.

With the above-described circuit arrangement, the switching circuit 10 can be configured to input an external power supply from the first wire end L1 and output an external power supply from the second wire end L2, and can also be configured to input an external power supply from the second wire end L2 and output an external power supply from the first wire end L1. In use, a live wire of the alternating current may be connected to either of the first live wire end L1 and the second live wire end L2, and a neutral wire of the alternating current is connected to the neutral wire end N, thereby providing an input of external power to the switching circuit 10. The other ends of the first and second live wire ends L1 and L2 and the neutral wire end N in the switching circuit 10 are connected to the electric consumer to supply power to the electric consumer. By operating the control module 104 on the switching circuit 10, it is possible to control whether the appliance is operating.

In addition, the present disclosure also provides a switching device having the switching circuit 10 described above. Compared with the switch box in the prior art, the switch device does not need to distinguish the connection method of the input live wire end and the output zero wire end. In other words, either one of the first and second fire line ends in the present disclosure may be the input fire line end and the other end may be the output fire line end. Therefore, the switch device is not easy to generate the problem of wiring errors, and is more convenient for users to use.

Although the present utility model has been described herein with reference to particular examples, which are intended to be illustrative only and not to be limiting of the utility model, it will be apparent to those of ordinary skill in the art that changes, additions or deletions may be made to the disclosed embodiments without departing from the spirit and scope of the utility model.

Claims

1. A switching circuit, the switching circuit comprising:

a power input module configured to input an external power, the power input module including a first input circuit from a first fire wire end and a second input circuit from a second fire wire end;

a voltage conversion module coupled to the power input module, the voltage conversion module configured to convert a voltage input thereto into an operating voltage;

a control module coupled to the voltage conversion module to obtain the operating voltage, the control module configured to generate an on control signal or an off control signal; and

a power output module coupled to the control module, the power output module configured to cause the first and second fire wire ends to be turned on in response to the turn-on control signal to output the external power source, and configured to cause the first and second fire wire ends to be turned off in response to the turn-off control signal to prevent the external power source from being output,

wherein the first input circuit comprises a first diode capable of transmitting a voltage from the first live terminal to the voltage conversion module, the second input circuit comprises a second diode capable of transmitting a voltage from the second live terminal to the voltage conversion module, and the external power source is a zero live.

2. The switching circuit of claim 1, wherein the switching circuit is configured to input the external power source from the first hot terminal and output the external power source from the second hot terminal, the switching circuit further configured to input the external power source from the second hot terminal and output the external power source from the first hot terminal.

3. The switching circuit of claim 1, further comprising a filtering module coupled to the power input module and the voltage conversion module.

4. The switching circuit of claim 1, wherein the control module comprises:

a WiFi unit configured to generate at least a first WiFi signal and a second WiFi signal;

a key unit configured to generate at least a first key signal and a second key signal;

a processing unit coupled to the WiFi unit and the key unit, respectively, the processing unit configured to generate the on control signal in response to the first WiFi signal or the first key signal, and further configured to generate the off control signal in response to the second WiFi signal or the second key signal.

5. The switching circuit of claim 1, wherein the power input module further comprises a current regulator configured to regulate a current of the first input circuit or the second input circuit.

6. The switching circuit of claim 1, wherein the power input module further comprises a varistor connected in parallel between the first live and neutral terminals or the second live and neutral terminals and a fuse connected in series in the first or second input circuits, respectively, the varistor and the fuse being configured to protect against surge overvoltages.

7. The switching circuit of claim 1, wherein the power input module further comprises a safety capacitor connected in parallel between the first hot terminal and the neutral terminal or between the second hot terminal and the neutral terminal.

8. The switching circuit of claim 7, wherein the power input module further comprises at least one resistor connected in parallel between the first and second hot terminals or between the second hot terminal and the neutral terminal.

9. The switching circuit of claim 1, wherein the power supply output module comprises:

a semiconductor element including an input terminal and an output terminal, the input terminal coupled to the control module to receive the on control signal or the off control signal;

a control element, including a control end, a first end, and a second end, wherein the control end is used for controlling the on-off between the first end and the second end, the control end is coupled to the output end of the semiconductor element, the first end is coupled to the first fire wire end, and the second end is coupled to the second fire wire end.

10. The switching circuit according to claim 9, wherein the semiconductor element is an optocoupler thyristor, and the control element is a thyristor or a relay.

11. A switching device comprising a switching circuit according to any one of claims 1-10.