CN220692830U - Switch - Google Patents

Abstract

Embodiments of the present utility model provide a switch, wherein the switch includes: the device comprises a detection circuit, a control circuit and a circuit taking circuit; the detection circuit is used for detecting the working mode of the switch; the working modes comprise a first mode and a second mode; the control circuit is respectively connected with the detection circuit and the electricity taking circuit and is used for controlling the electricity taking circuit to take electricity according to the corresponding electricity taking mode according to the working mode of the switch; the power taking mode comprises a first power taking mode and a second power taking mode; the power taking circuit is connected with the live wire end and/or the zero wire end of the switch and is used for supplying power to the switch after taking power according to a power taking mode corresponding to the working mode of the switch. The embodiments of the utility model solve the problem that the single zero fire general switch in the related technology can not provide rich functional circuits, so that the utilization rate is lower.

Description

Switch

Technical Field

The utility model relates to the field of intelligent switches, in particular to a switch.

Background

The intelligent switch is used as a ring with highest use frequency and most critical control in the home, and is an essential basic product in the intelligent home. The intelligent switch is internally provided with a microcontroller module, so that the microcontroller module needs to be continuously powered when the intelligent switch is turned on and off in order to ensure the normal work of the microcontroller module. The intelligent switch on the market at present is divided into a single live wire switch, a zero live wire switch and a single zero live wire universal switch.

The conventional single-zero-fire universal switch supplies power to the microcontroller and other circuits inside the switch by carrying a battery, and on one hand, the battery needs to be replaced regularly due to limited electric quantity of the battery, and on the other hand, the internal power consumption of the switch cannot be too high, otherwise, the battery needs to be replaced more frequently, so that some functional circuits with higher power consumption, for example, a power metering circuit for measuring the load electric parameters, have to be abandoned by the single-zero-fire universal switch.

From the above, the single zero fire universal switch cannot provide abundant functional circuits yet, resulting in lower utilization rate.

Disclosure of Invention

The embodiment of the utility model provides a switch, which can solve the problem that a single zero fire general switch in the related technology cannot provide rich functional circuits, so that the utilization rate is low. The technical scheme is as follows:

according to one aspect of an embodiment of the present utility model, a switch includes: the device comprises a detection circuit, a control circuit and a circuit taking circuit; the detection circuit is used for detecting the working mode of the switch; the working modes comprise a first mode and a second mode; the control circuit is respectively connected with the detection circuit and the electricity taking circuit and is used for controlling the electricity taking circuit to take electricity according to the corresponding electricity taking mode according to the working mode of the switch; the power taking mode comprises a first power taking mode and a second power taking mode; the power taking circuit is connected with the live wire end and/or the zero wire end of the switch and is used for supplying power to the switch after taking power according to a power taking mode corresponding to the working mode of the switch.

In an exemplary embodiment, the detection circuit includes a voltage input module, an isolation module, and a detection signal output module; the voltage input module is used for transmitting a high-voltage signal to the isolation module under the condition that a zero line of the switch is connected with the zero line; or under the condition that the zero line end of the switch is not connected with the zero line, stopping transmitting the high-voltage signal to the isolation module; the isolation module is used for generating a first low-voltage signal or a second low-voltage signal according to whether the voltage input module outputs the high-voltage signal or not, and transmitting the first low-voltage signal or the second low-voltage signal to the detection signal output module; the detection signal output module is used for generating a corresponding detection signal according to the first low-voltage signal or the second low-voltage signal, and transmitting the detection signal to the control circuit, so that the control circuit determines the working mode of the switch according to the detection signal.

In an exemplary embodiment, the isolation module includes an optocoupler unit; if the input end of the optical coupling unit receives the high-voltage signal output by the voltage input module, the output end of the optical coupling unit is conducted to generate the first low-voltage signal; and if the input end of the optical coupler unit does not receive the high-voltage signal output by the voltage input module, the output end of the optical coupler unit is disconnected, and the second low-voltage signal is generated.

In an exemplary embodiment, the detection signal output module includes a switching element and a current limiting element; the control end of the switching element is used for receiving the first low-voltage signal or the second low-voltage signal output by the isolation module, so that the input end and the output end of the switching element are turned on or off according to the first low-voltage signal or the second low-voltage signal; one end of the current limiting element is connected with the output end of the switching element, and the other end of the current limiting element is connected with the power supply end and is used for outputting the corresponding detection signal under the condition that the switching element is turned on or turned off.

In an exemplary embodiment, the power extraction circuit includes a first power extraction circuit and a second power extraction circuit; if the working mode of the switch is the first mode, the first power taking circuit takes power from the live wire end of the switch according to the first power taking mode corresponding to the first mode, so that the switch enters a first power consumption mode; if the working mode of the switch is the second mode, the second power taking circuit takes power from the live wire end and the zero wire end of the switch according to the second power taking mode corresponding to the second mode, so that the switch enters a second power consumption mode; the power consumption in the second power consumption mode is higher than the power consumption in the first power consumption mode.

In an exemplary embodiment, the first power extraction circuit includes a first conversion element and a first switching element, wherein an input voltage of the first power extraction circuit is converted into a first voltage by the first conversion element and the switch is supplied with power via the first switching element.

In an exemplary embodiment, the second power supply circuit includes a second conversion element and a second switching element, wherein an input voltage of the second power supply circuit is converted into a second voltage by the second conversion element and the switch is supplied with power via the second switching element.

In an exemplary embodiment, the switch further includes a relay control circuit connected to the control circuit, the relay control circuit including a relay, the relay being turned on under control of the control circuit, a load connected to the switch being operated by conduction control of the relay.

In an exemplary embodiment, the switch further includes a functional circuit connected to the power extraction circuit; the power taking circuit outputs a first voltage to the functional circuit under the condition of the first power taking mode; or under the condition of the second power-taking mode, outputting a second voltage to the functional circuit; the first voltage is lower than the second voltage.

In an exemplary embodiment, the functional circuit includes at least one of: a power metering circuit for measuring an electrical parameter of a load connected to the switch; the indication circuit is used for carrying out mode indication according to the working mode of the switch; and the communication circuit is used for communication among all circuits in the switch.

The technical scheme provided by the utility model has the beneficial effects that:

in the above technical scheme, the switch includes detection circuitry, control circuit and gets the circuit, in this switch, detect the operating mode of switch through detection circuitry for control circuit gets the circuit and adopts corresponding electricity mode to get electricity according to the operating mode control of switch: when the working mode of the switch is a first mode, the power taking circuit takes power from the live wire end of the switch according to a first power taking mode, and the switch is allowed to run with low power consumption at the moment, namely the power consumption of the functional circuit in the switch is reduced, such as the power metering circuit is closed; when the working mode of the switch is the second mode, the power taking circuit takes power from the live wire end and the zero wire end of the switch according to the second power taking mode, and the switch is allowed to run with high power consumption, such as starting the power metering circuit, so that the power supply in a battery mode is avoided, the battery does not need to be replaced regularly, and the switch also needs to discard some functional circuits with higher power consumption, thereby effectively solving the problems that the single-zero fire universal switch in the related art cannot provide rich functional circuits yet, and the utilization rate is lower.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments of the present utility model will be briefly described below.

FIG. 1 is a prior art power block diagram of an intelligent switch;

FIG. 2 is a schematic diagram of a switch according to various embodiments of the present utility model;

FIG. 3 is a schematic diagram of a detection circuit according to an exemplary embodiment;

FIG. 4 is a schematic diagram of another detection circuit shown in accordance with an exemplary embodiment;

FIG. 5 is a schematic diagram of a circuit fetch circuit shown according to an example embodiment;

FIG. 6 is another schematic structural view of a switch according to an exemplary embodiment;

fig. 7 is a schematic diagram of a switch according to an exemplary embodiment.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

The following is an introduction and explanation of several terms involved in this application:

single fire switch: refers to a switch that can operate by connecting only a live wire and a load wire.

Zero fire switch: refers to a switch that can operate only by connecting a live wire, a load wire and a neutral wire at the same time.

Single zero fire universal switch: refers to a switch that can operate by connecting only the live wire, or both live and neutral wires.

As previously described, the intelligent switches are classified as single live wire switches, zero live wire switches, and single zero live wire universal switches.

The single-zero fire universal switch can be simultaneously adapted to a single-fire wiring mode and a zero-fire wiring mode, and a battery is used for supplying power to a microcontroller and a functional circuit inside the switch.

As shown in figure 1, the single zero fire universal switch consists of a relay, a relay control circuit, a battery power supply circuit, an MCU (micro controller) and the like. The MCU is independently powered by the battery through a battery power supply circuit, and the MCU controls the on and off of the relay through a relay control circuit, so that intelligent control of the switch is realized.

On the one hand, the capacity of the battery is limited, and the battery needs to be replaced periodically, on the other hand, the power consumption of the switch cannot be too high, otherwise the battery needs to be replaced more frequently, so that in order to reduce the replacement frequency, the single-zero-fire universal switch has to discard some functional circuits with high power consumption.

To avoid using battery powered, the inventors propose that the switch can be powered in a single fire switch and a zero fire switch power mode, but the inventors also realized that the power mode still has the following drawbacks:

the single-fire switch realizes electricity taking by forming a loop between a live wire end of the switch and a load, and for a small-power load such as a bulb, a phenomenon of 'ghost fire' (when the intelligent switch controls a low-power energy-saving lamp or an LED lamp to turn off, the working power consumption of an internal microcontroller flows through the lamp, so that the lamp is flickering or slightly bright) can occur, and unnecessary power consumption is generated.

The zero fire switch does not have the phenomenon of 'ghost fire', but the zero fire switch can work only by being connected with a live wire and a zero wire, and most of house switches are single fire switches, so that the zero fire switch cannot be adapted to all house conditions, and the universality is poor.

Therefore, the switch provided by the utility model can solve the problems.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

Switch in an exemplary embodiment, as shown in fig. 2, a switch 20 is shown that includes a detection circuit 210, a control circuit 220, and a fetch circuit 230.

The detection circuit 210 is configured to detect an operation mode of the switch 20, where the operation mode includes a first mode and a second mode. Specifically, the first mode refers to a live wire mode, and the live wire mode is that a switch is connected to a circuit only through a live wire; the second mode refers to a zero fire mode, wherein the zero fire mode is that a zero line and a fire line of a switch are simultaneously connected into a circuit.

The control circuit 220 is connected to the detection circuit 210 and the power taking circuit 230, respectively, and is used for controlling the power taking circuit 230 to take power according to the corresponding power taking mode according to the operation mode of the switch 20. The power taking mode comprises a first power taking mode and a second power taking mode. Specifically, the first power taking mode refers to that a power taking circuit takes power from a live wire end of a switch; the second power-taking mode refers to that the power-taking circuit takes power from the live wire end and the null wire end of the switch.

The power taking circuit 230 is connected to the live wire end and/or the neutral wire end of the switch 20, and is configured to supply power to the switch 20 after taking power according to a power taking mode corresponding to an operation mode of the switch 20, as shown in fig. 2, and the power taking circuit 230 supplies power to the control circuit 210 and the detection circuit 230 in the switch 20 after taking power. In one possible implementation, after power is supplied, the switch 20 may enter a first power consumption mode, i.e., power consumption of circuits inside the switch is reduced; a second power consumption mode may also be entered, i.e. allowing the circuits inside the switch to have a larger power consumption. In this case, the power consumption of the internal circuits of the switch in the second power consumption mode is higher than that of the internal circuits in the first power consumption mode.

For example, if the operation mode of the switch 20 is the first mode, the corresponding power-taking mode is the first power-taking mode, and at this time, the power-taking circuit takes power from the live wire end of the switch according to the first power-taking mode and supplies power to the switch 20, so that the switch enters the first power consumption mode, thereby avoiding the occurrence of the "ghost fire" phenomenon.

Based on the circuit, different power taking modes of the switch are realized, namely when the working mode of the switch is a first mode, the power taking circuit takes power from the live wire end of the switch according to the first power taking mode, and the switch is allowed to enter a first power consumption mode at the moment, namely the power consumption of the functional circuit in the switch is reduced, such as the power metering circuit is closed; when the working mode of the switch is the second mode, the power taking circuit takes power from the live wire end and the zero wire end of the switch according to the second power taking mode, and the switch is allowed to enter the second power consumption mode, such as starting the power metering circuit, so that power supply in a battery mode is avoided, the battery does not need to be replaced regularly, and the switch also needs to discard some functional circuits with higher power consumption, so that the problem that the single-zero-fire universal switch in the related technology cannot provide rich functional circuits yet and the utilization rate is lower is effectively solved.

In one exemplary embodiment, as shown in fig. 3, the detection circuit 210 includes a voltage input module 211, an isolation module 212, and a detection signal output module 213.

The voltage input module 211 is configured to transmit a high voltage signal to the isolation module when the zero line of the switch is connected to the zero line; or under the condition that the zero line end of the switch is not connected with the zero line, stopping transmitting the high-voltage signal to the isolation module.

The isolation module 212 is configured to generate a first low voltage signal or a second low voltage signal according to whether the voltage input module outputs the high voltage signal, and transmit the first low voltage signal or the second low voltage signal to the detection signal output module.

The detection signal output module 213 is configured to generate a corresponding detection signal according to the first low voltage signal or the second low voltage signal, and transmit the detection signal to the control circuit, so that the control circuit determines the working mode of the switch according to the detection signal.

In one possible implementation, as shown in fig. 4, the isolation module 212 includes an optocoupler unit 2121. If the input end of the optocoupler 2121 receives the high voltage signal output by the voltage input module 211, the output end of the optocoupler 2121 is turned on to generate a first low voltage signal. If the input end of the optocoupler 2121 does not receive the high voltage signal output by the voltage input module 211, the output end of the optocoupler is disconnected, and a second low voltage signal is generated.

In one possible implementation, as shown in fig. 5, the detection signal output module 213 includes a switching element 2131 and a current limiting element 2132. The control terminal of the switching element 2131 is configured to receive the first low voltage signal or the second low voltage signal output by the isolation module 212, so that the input terminal and the output terminal of the switching element 2131 are turned on or off according to the first low voltage signal or the second low voltage signal; one end of the current limiting element 2132 is connected to the output terminal of the switching element 2131, and the other end is connected to the power source terminal, and outputs a corresponding detection signal when the switching element 2132 is turned on or off.

The optocoupler 2121 includes an optocoupler, the switching element 2131 includes a MOS transistor, and the current limiting element 2132 includes a plurality of resistors.

In a first example, the optocoupler unit 2121 includes an optocoupler U1, the switching element 2131 includes a MOS transistor Q1, and the current limiting element 2132 includes a resistor R1 and a resistor R2.

Specifically, a first input end a and a second input end K of the photoelectric coupler U1 are respectively connected with a live wire end L and a zero wire end N of the switch, a first output end E of the photoelectric coupler U1 is connected with a low level, a second output end C of the photoelectric coupler U1 is respectively connected with one end of a resistor R1, one end of a capacitor C1 and a gate g of a MOS tube Q1, the other end of the resistor R1 is connected with one end of a resistor R2, the other end of the capacitor C1 is grounded to GND, a drain d of the MOS tube Q1 is connected with the other end of the resistor R2, a source s of the MOS tube Q1 is grounded to GND, and a connection point of the resistor R1 and the resistor R2 is connected with a power supply end VCC3.

When the zero line end N of the switch 20 is not connected to the zero line, the input ends a and K of the photo coupler U1 are not input with high voltage signals, the output ends C and E are in an off state, a first low voltage signal is generated and transmitted to the gate g of the MOS transistor Q1, and at this time, the voltage between the gate g and the source s of the MOS transistor Q1 is pulled up to 3.3V by the input of the power supply end VCC3, and since 3.3V is greater than the on voltage (0.7V) of the MOS transistor Q1, the drain d and the source s of the MOS transistor Q1 are turned on, and accordingly, the detection signal n_det is pulled down to 0V.

At this time, the control circuit detects that the detection signal n_det is at a low level, and determines the operation mode of the switch to be the first mode.

When the zero line terminal N of the switch 20 is connected to the zero line, the high voltage signal input between the live line L and the zero line N is 220V of the grid voltage, the input terminals a and K of the photoelectric coupler U1 detect the high voltage signal, so that the output terminals C and E are in a conducting state, a second low voltage signal is generated and transmitted to the gate g of the MOS transistor Q1, at this time, the gate g of the MOS transistor Q1 is pulled down to 0V due to the connection of the second low voltage signal, the voltage between the gate g and the source s is smaller than the conducting voltage of the MOS transistor Q1, so that the drain d and the source s of the MOS transistor Q1 are turned off, and accordingly, the detection signal n_det is pulled up to 3.3V.

At this time, the control circuit detects that the detection signal n_det is at a high level, and determines that the operation mode of the switch is the second mode.

In a second example, the optocoupler unit 2121 includes a photo coupler U4, the switching element 2131 includes a MOS transistor Q3, and the current limiting element 2132 includes a resistor R14, a resistor R15, a resistor R16, and a resistor R17.

Specifically, a first input end a and a second input end K of the photoelectric coupler U4 are respectively connected with a live wire end L and a zero wire end N of the switch, a first output end E of the photoelectric coupler U4 is respectively connected with a gate g of the MOS transistor Q3 and one end of the resistor R17, a second output end C of the photoelectric coupler U4 is connected with the power supply end VCC3, meanwhile, a source s of the MOS transistor Q3 is connected with the other end of the resistor R17 and then is connected to the ground end GND low level, a drain d of the MOS transistor Q3 is connected to the power supply end VCC3 through the resistor R14, one end is connected with a drain d of the MOS transistor Q3 through the resistor R15 after the resistor R16 and the capacitor C6 are connected in parallel, and the other end is connected with the control circuit.

When the zero line end N of the switch 20 is not connected to the zero line, the photo coupler U4 does not output a high voltage signal, and the MOS transistor Q3 is turned off, and the voltage v_det=3.3V/(r16/(r16+r15+r14)) of the detection signal output by the detection signal output module.

When the zero line terminal N of the switch 20 is connected to the zero line, the high voltage signal output by the photo coupler U4 is a sine wave, and then the MOS transistor Q3 is turned on and off at a frequency of 50Hz, and when the duty ratio is D, the voltage v_det=3.3v/(r16/(r16+r15+r14)) of the detection signal output by the detection signal output module is D.

At this time, the control circuit can judge the working mode of the switch according to the difference of the voltage V_DET of the detection signal, so as to control the power taking circuit to take power according to the power taking mode corresponding to the working mode of the switch to supply power to the switch.

Based on the circuit, on one hand, the high-voltage power input by the live wire end and the zero wire end of the optocoupler isolating switch and the high-voltage power input by the inside of the switch are utilized, so that the circuit has higher reliability and meets the safety requirement; on the other hand, the detection signal is output at a high level when the zero line is connected and is output at a low level when the zero line is not connected, so that the judgment logic of the control circuit is simple, and the use of the control circuit is greatly facilitated.

Referring to fig. 6, in an exemplary embodiment, the power-taking circuit includes a first power-taking circuit and a second power-taking circuit.

The first power taking circuit is a single-fire power taking circuit and takes power according to a first power taking mode; the second power taking circuit is a zero-fire power taking circuit and takes power according to a second power taking mode.

Specifically, if the working mode of the switch is a first mode, the first power taking circuit takes power from the live wire end of the switch according to a first power taking mode corresponding to the first mode, so that the switch enters a first power consumption mode.

In one possible implementation, the first power extraction circuit includes a first conversion element and a first switching element, wherein an input voltage of the first power extraction circuit is converted into a first voltage by the first conversion element and the first switching element supplies power to the switch.

And if the working mode of the switch is the second mode, the second power taking circuit takes power from the live wire end and the zero wire end of the switch according to a second power taking mode corresponding to the second mode, so that the switch enters a second power consumption mode.

In one possible implementation, the second power taking circuit includes a second conversion element and a second switching element, wherein an input voltage of the second power taking circuit is converted into a second voltage by the second conversion element, and the switch is supplied with power via the second switching element.

Based on the circuit, the switch is realized to work in different power consumption operation modes, so that rich functional circuits can be deployed in the switch, namely, when power is taken from a live wire end of the switch, the switch is allowed to enter a first power consumption mode, and the power consumption of the functional circuits in the switch is reduced, such as the power metering circuit is closed; when power is taken from the live wire end and the zero wire end of the switch, the switch is allowed to enter a second power consumption mode, such as starting a power metering circuit, so that the switch is prevented from discarding some functional circuits with higher power consumption, the utilization rate of the switch is effectively improved, and the application scene of the switch is enriched.

Referring to fig. 7, in an exemplary embodiment, the switch 20 further includes a relay control circuit 240 connected to the control circuit 220, the relay control circuit including a relay, the relay being turned on under the control of the control circuit 220, and a load connected to the switch being operated by the conduction control of the relay.

In an exemplary embodiment, the switch 20 further includes a functional circuit connected to the power-taking circuit 230, wherein the power-taking circuit 230 outputs a first voltage to the functional circuit in the case of the first power-taking mode; or under the condition of the second power-taking mode, outputting a second voltage to the functional circuit; the first voltage is lower than the second voltage. In other words, when the switch 120 is powered by the first voltage, the switch enters the first power consumption mode, so as to avoid the occurrence of a "ghost fire" phenomenon; when the switch 120 is powered by the second voltage, the switch enters a second power consumption mode, so that more abundant functional circuits can be deployed in the switch to improve the utilization rate of the switch.

With continued reference to fig. 7, the functional circuits include, but are not limited to, one or more of a power metering circuit, an indication circuit, and a communication circuit.

Wherein the power metering circuit 250 is used to measure an electrical parameter of a load connected to the switch 20. The electrical parameters include, but are not limited to: current, voltage, power, etc.

An indication circuit 260 for performing a mode indication according to the operation mode of the switch 20. For example, the indication circuit 260 includes an indication lamp, and the indication lamp is turned on when the operation mode of the switch 20 is the first mode, and turned off when the operation mode of the switch 20 is the second mode. Of course, in other embodiments, the indication circuit 260 may include indication lights with different colors, and may further include a buzzer, a key, etc., which are not limited herein.

The communication circuit 220 is used for communication between all circuits in the switch 20. Of course, in other embodiments, the communication circuit 220 may also be integrated into the control circuit, which is not limited herein.

Based on the above one or more functional circuits, when the working mode of the switch 20 is the first mode, the switch 20 is powered from the live wire end of the switch 20 through the first power-taking circuit, and at this time, the power consumption of each functional circuit in the switch 20 needs to be reduced, for example, the communication module reduces the radio frequency emission power and the communication frequency, turns off the metering function of the power metering circuit and reduces the brightness of the indicator lamp, so as to achieve the purpose of reducing the power consumption and avoid the phenomenon of "grimacing fire".

When the working mode of the switch 20 is the second mode, the switch 20 is powered from the live wire end and the zero wire end of the switch 20 through the second power taking circuit, and each functional circuit in the switch 20 can work in the highest performance state because the problem of 'ghost fire' is not needed to be considered, for example, the communication module transmits radio frequency signals in full power and keeps communication, the power metering circuit is started to be responsible for measuring the function and reporting power consumption data, and the indicator lamp is lightened with the maximum brightness, so that the switch 20 is ensured to enter the second power consumption mode.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.

The foregoing is only a partial embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. The switch is characterized by comprising a detection circuit, a control circuit and a power taking circuit; wherein,

the detection circuit is used for detecting the working mode of the switch; the working modes comprise a first mode and a second mode;

the control circuit is respectively connected with the detection circuit and the electricity taking circuit and is used for controlling the electricity taking circuit to take electricity according to the corresponding electricity taking mode according to the working mode of the switch; the power taking mode comprises a first power taking mode and a second power taking mode;

the power taking circuit is connected with the live wire end and/or the zero wire end of the switch and is used for supplying power to the switch after taking power according to a power taking mode corresponding to the working mode of the switch.

2. The switch of claim 1, wherein the detection circuit comprises a voltage input module, an isolation module, a detection signal output module; wherein,

the voltage input module is used for transmitting a high-voltage signal to the isolation module under the condition that a zero line of the switch is accessed to the zero line; or under the condition that the zero line end of the switch is not connected with the zero line, stopping transmitting the high-voltage signal to the isolation module;

the isolation module is used for generating a first low-voltage signal or a second low-voltage signal according to whether the voltage input module outputs the high-voltage signal or not, and transmitting the first low-voltage signal or the second low-voltage signal to the detection signal output module;

the detection signal output module is used for generating a corresponding detection signal according to the first low-voltage signal or the second low-voltage signal, and transmitting the detection signal to the control circuit, so that the control circuit determines the working mode of the switch according to the detection signal.

3. The switch of claim 2, wherein the isolation module comprises an optocoupler unit; wherein,

if the input end of the optical coupling unit receives the high-voltage signal output by the voltage input module, the output end of the optical coupling unit is conducted to generate the first low-voltage signal;

and if the input end of the optical coupler unit does not receive the high-voltage signal output by the voltage input module, the output end of the optical coupler unit is disconnected, and the second low-voltage signal is generated.

4. The switch of claim 2, wherein the detection signal output module comprises a switching element and a current limiting element; wherein,

the control end of the switching element is used for receiving the first low-voltage signal or the second low-voltage signal output by the isolation module, so that the input end and the output end of the switching element are turned on or off according to the first low-voltage signal or the second low-voltage signal;

one end of the current limiting element is connected with the output end of the switching element, and the other end of the current limiting element is connected with the power supply end and is used for outputting the corresponding detection signal under the condition that the switching element is turned on or turned off.

5. The switch of claim 1, wherein the power extraction circuit comprises a first power extraction circuit and a second power extraction circuit;

if the working mode of the switch is the first mode, the first power taking circuit takes power from the live wire end of the switch according to the first power taking mode corresponding to the first mode, so that the switch enters a first power consumption mode;

if the working mode of the switch is the second mode, the second power taking circuit takes power from the live wire end and the zero wire end of the switch according to the second power taking mode corresponding to the second mode, so that the switch enters a second power consumption mode; the power consumption in the second power consumption mode is higher than the power consumption in the first power consumption mode.

6. The switch of claim 5, wherein the first power extraction circuit includes a first conversion element and a first switching element, wherein an input voltage of the first power extraction circuit is converted to a first voltage by the first conversion element and the switch is powered via the first switching element.

7. The switch of claim 5, wherein the second power extraction circuit includes a second conversion element and a second switching element, wherein an input voltage of the second power extraction circuit is converted to a second voltage by the second conversion element and the switch is supplied with power via the second switching element.

8. A switch as claimed in any one of claims 1 to 7, further comprising a relay control circuit connected to the control circuit, the relay control circuit comprising a relay which is turned on under the control of the control circuit, the load connected to the switch being controlled to operate by the conduction of the relay.

9. The switch of any one of claims 1 to 7, further comprising a functional circuit connected to the power take-off circuit; wherein,

the power taking circuit outputs a first voltage to the functional circuit under the condition of the first power taking mode; or under the condition of the second power-taking mode, outputting a second voltage to the functional circuit; the first voltage is lower than the second voltage.

10. The switch of claim 9, wherein the functional circuitry comprises at least one of:

a power metering circuit for measuring an electrical parameter of a load connected to the switch;

the indication circuit is used for carrying out mode indication according to the working mode of the switch;

and the communication circuit is used for communication among all circuits in the switch.