CN218771309U - Single-fire power taking circuit and single-fire power taking system - Google Patents

Abstract

The utility model relates to a single fire electricity-taking circuit and a single fire electricity-taking system, which comprises a first electricity-taking module and a second electricity-taking module; the first power taking module comprises a first terminal and a second terminal, the first terminal is used for being connected with the front end point of the live wire circuit, and the second terminal is used for being connected with the rear end point of the live wire circuit; the second power taking module comprises a third terminal and a fourth terminal, the third terminal is used for being connected with the rear end point of the live wire line, and the fourth terminal is used for being connected with the zero wire line; the first power taking module is used for taking power from the front end point of the live wire line and then supplying power to the first power taking module when the voltage of the live wire line is greater than the voltage of the zero wire line; the second power taking module is used for supplying power to the second power taking module after power is taken from the zero line when the voltage of the zero line is larger than that of the live line. The power taking function of the single live wire power taking circuit does not need to consider the on-off state of the load, and the power taking independence is strong.

Description

Single-fire power taking circuit and single-fire power taking system

Technical Field

The utility model relates to an electric technical field is got to the alternating current circuit, especially relates to a single fire is got electric circuit and single fire and is got electric system.

Background

At present, with the continuous development of the intelligent internet of things technology, the alternating current power taking technology is widely applied to various power utilization occasions.

In the prior art, an ac power taking module is disposed in an ac loop for supplying power to a load, and when the load is turned on, the ac power taking module takes power from the ac loop, and when the load is turned off, the ac loop is also cut off, and the ac power taking module stops taking power from the ac loop.

However, in the ac circuit, when the load is disconnected, the ac power-taking module cannot take power, so that the power-taking function of the ac power-taking module depends on the on-off state of the load, and the power-taking independence is weak.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a single hot-line power-taking circuit and a single hot-line power-taking system with high power-taking independence.

In a first aspect, the present invention provides a single live wire power-taking circuit, which includes a first power-taking module and a second power-taking module; the first power taking module comprises a first terminal and a second terminal, the first terminal is used for being connected with the front end point of the live wire circuit, and the second terminal is used for being connected with the rear end point of the live wire circuit; the second power taking module comprises a third terminal and a fourth terminal, the third terminal is used for being connected with the rear end point of the live line circuit, and the fourth terminal is used for being connected with the zero line circuit; wherein:

the first power taking module is used for being connected with an external first power module, and when the voltage of the live wire line is greater than the voltage of the zero wire line, power is taken from the front end point of the live wire line to supply power to the first power module;

the second electricity taking module is used for being connected with an external second electricity using module, and when the voltage of the zero line is larger than that of the live line, electricity is taken from the zero line and then the second electricity using module is powered.

In one embodiment, the first power taking module further includes a first input end, a second input end, a first output end, and a second output end; the first input end and the second output end are connected to the first terminal in parallel, and the first input end is used for being connected with the input end of the first electric module; the second input end and the first output end are connected to the second wiring end in parallel, and the first output end is used for being connected with the output end of the first electric module;

the second power taking module further comprises a third input end, a fourth input end, a third output end and a fourth output end; the third input end and the fourth output end are connected to the third wiring end in parallel, and the fourth output end is used for being connected with the output end of the second photovoltaic module; the fourth input end and the third output end are connected to the fourth wiring end in parallel, and the fourth output end is used for being connected with the input end of the second photovoltaic module.

In one embodiment, the first power taking module includes a first unidirectional conductive element and a second unidirectional conductive element, where:

the input end of the first unidirectional conduction element is connected with the first input end, and the output end of the first unidirectional conduction element is used for being connected with the input end of the first electric module;

the input end of the second one-way conduction element is connected with the second input end, and the output end of the second one-way conduction element is connected with the second output end.

In one embodiment, the first power taking module further includes a first energy storage capacitor; the first end of the first energy storage capacitor is used for being connected between the output end of the first unidirectional conduction element and the input end of the first electric module, and the second end of the first energy storage capacitor is used for being connected between the output end of the first electric module and the first output end.

In one embodiment, the second power taking module includes a third unidirectional conductive element and a fourth unidirectional conductive element, where:

the input end of the third unidirectional conduction element is connected with the third input end, and the output end of the third unidirectional conduction element is connected with the third output end;

the input end of the fourth unidirectional conducting element is connected with the fourth input end, and the output end of the fourth unidirectional conducting element is used for being connected with the input end of the second photovoltaic module.

In one embodiment, the second power taking module further includes a second energy storage capacitor; the first end of the second energy storage capacitor is used for being connected between the output end of the fourth unidirectional conducting element and the input end of the second photovoltaic module, and the second end of the second energy storage capacitor is used for being connected between the output end of the second photovoltaic module and the fourth output end.

In one embodiment, at least one of the first unidirectional conducting element, the second unidirectional conducting element, the third unidirectional conducting element and the fourth unidirectional conducting element is one of a diode, an MOS switch tube and a regulated switch tube.

In one embodiment, the single live wire power taking circuit further comprises a loop control switch, and the loop control switch is used for being connected to a line between the first terminal and the fourth terminal and controlling connection or disconnection between the live wire line and the zero wire line.

In one embodiment, the loop control switch is a mechanical control switch.

The second aspect, the utility model provides a single fire gets electric system, it includes foretell single fire and gets electric circuit, first electric module and second electric module, wherein:

the first power taking module is connected with the first power taking module of the single live wire power taking circuit, and when the voltage of the live wire line is greater than the voltage of the zero wire line, the first power taking module is used for receiving electric energy obtained by the first power taking module from the live wire line;

the second thermoelectric module is connected with a second power taking module of the single live wire power taking circuit, and when the voltage of the zero line is greater than the voltage of the live wire line, the second thermoelectric module is used for receiving the electric energy acquired by the second power taking module from the zero line.

In above-mentioned single fire gets electric circuit and single fire and gets electric system, when the voltage of live wire line is greater than the voltage of zero line, first get the electric module and get the electricity, when the voltage of zero line is greater than the voltage of live wire line, the second gets the electric module and gets the electricity, promptly, through the cooperation setting of first getting the electric module and second getting the electric module, can realize getting the electricity from forming jointly the interchange return circuit by live wire line and zero line when getting the electricity and dividing the time, need not to consider the on-off state of load, strengthen effectively getting the independence that the electricity function of getting the electric module realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic block diagram of a single live wire power supply circuit according to an embodiment;

FIG. 2 is a waveform diagram of a single hot-line circuit according to an embodiment;

FIG. 3 is a schematic diagram of the forward current flow in a single hot firing circuit according to one embodiment;

FIG. 4 is a schematic diagram of a reverse current flow in a single hot circuit according to one embodiment;

FIG. 5 is a schematic circuit diagram of a single hot-line power supply circuit according to an embodiment;

fig. 6 is a schematic block structure diagram of a single hot-line power taking system according to an embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.

It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

As shown in fig. 1, a single hot power circuit 100 of an embodiment includes a first power module 10 and a second power module 20. The single live wire power-taking circuit 100 is applied to an alternating current loop, and both the first power-taking module 10 and the second power-taking module 20 are used for taking power from the alternating current loop.

Specifically, the first power module 10 includes a first terminal P11 and a second terminal P12, and the second terminal 20 includes a third terminal P21 and a fourth terminal P22. Specifically, the ac loop is a loop formed by a live line L and a null line N. When the single live wire power taking circuit 100 is applied to an alternating current loop, the first terminal P11 is used for being connected with the front end point of the live wire line L, and the second terminal P12 is used for being connected with the rear end point of the live wire line L, so that the first power taking module 10 is connected between the front end point and the rear end point of the live wire line L, and the first power taking module 10 can take power from the live wire line L; the third terminal P21 is used for being connected with the rear end point of the live line L, and the fourth terminal P22 is used for being connected with the zero line N, so that the second power taking module 20 is connected between the rear end point of the live line L and the zero line N, and the second power taking module 20 can have a function of taking power from the zero line N. Wherein:

the first power-taking module 10 is used for being connected with an external first electric module 30. When the voltage of the live line L is greater than the voltage of the neutral line N, a forward current is output from the front end point of the live line L to the single live line circuit 100, and the forward current has a band shown as a positive half band in fig. 2. First, the forward current flows into the first power module 10 from the first terminal P11, so that the first power module 10 has the capability of providing electric energy to the first electric module 30 connected thereto. Then, the forward current flows from the second terminal P12 to the rear end point of the live line L located outside the first power taking module 10. Then, the forward current flowing out from the rear end point of the live line L sequentially flows to the neutral line N through the third terminal P21 and the fourth terminal P22 of the second power taking module 20.

And the second power taking module 20 is used for being connected with an external second photovoltaic module 40. When the voltage of the zero line N is greater than the voltage of the live line L, a reverse current is output from the zero line N to the single live line power circuit 100, and the wave band of the reverse current is shown as the negative half wave band shown in fig. 2. First, the reverse current flows into the second power module 20 from the fourth terminal P22, so that the second power module 20 has the capability of supplying electric energy to the second photovoltaic module 40 connected thereto. Then, the reverse current flows from the third terminal P21 to the rear end point of the live line L outside the second power taking module 20. Then, the reverse current flowing from the rear end point of the live line L flows to the live line L through the second terminal P12 and the first terminal P11 of the first power taking module 10 in sequence.

It should be noted that the first or second electrical module may be directly a load, or may be a power module for supplying power to the load; for example, in some embodiments, the first electrical module 30 is a self-powered power module that can supply power to one of a control panel, a communication device and a monitoring device, and the second electrical module 40 is an LED driving module that drives an LED lamp to emit light.

In the above single live wire power supply circuit, when the voltage of the live wire line L is greater than the voltage of the zero line N (i.e., when the alternating current in fig. 2 is in a positive half-wave), the first power supply module 10 can supply power to the first power supply module 30 after supplying power from the front end point of the live wire line L; when the voltage of the neutral line N is greater than the voltage of the live line L (i.e., the ac power in fig. 2 is in a negative half-wave), the second power taking module 20 can take power from the neutral line N and then supply power to the second power module 40. Through the matching arrangement of the first power taking module 10 and the second power taking module 20, time-sharing power taking in an alternating current loop formed by the live line 10 and the zero line 20 can be realized, the on-off state of a load does not need to be considered during power taking, and the independence of the power taking function of the power taking modules is effectively enhanced.

As shown in fig. 3 to 4, in more detail, the first power-taking module 10 further includes a first input end P13, a second input end P14, a first output end P15, and a second output end P16.

The first input end P13 and the second output end P16 are connected in parallel to the first terminal P11, and the first input end P13 is used for connecting with an input end of the first electrical module 30; the second input P14 and the first output P15 are connected in parallel to the second connection P12, and the first output P13 is used for connecting to an output of the first electrical module 30.

The second power taking module 20 further includes a third input end P23, a fourth input end P24, a third output end P25 and a fourth output end P26.

The third input end P23 and the fourth output end P26 are connected in parallel to the third terminal P21, and the fourth output end P26 is used for being connected with the output end of the second electrical module 40; the fourth input P24 and the third output P25 are connected in parallel to a fourth terminal P22, and the fourth output P26 is used for connecting to an input of the second electrical module 40.

The specific electricity taking process is as follows:

as shown in fig. 3, when the voltage of the live line L is greater than the voltage of the neutral line N, a forward current is input to the first power-taking module 10 from the front end point of the live line L, and flows through the first terminal P11, the first input end P13, the input end of the first electric module 30, the output end of the first electric module 30, the first output end P14, and the second terminal P12 in the first power-taking module 10 in sequence, and then flows out to the rear end point of the live line L; then, the forward current is input to the second power-taking module 20 from the rear end point of the live line L, sequentially flows through the third terminal P21, the third input terminal P23, the third output terminal P24, and the fourth terminal P22 in the second power-taking module 20, and then flows out to the neutral line N. In the above process, since the forward current flows from the first power taking module 10 through the first electric module 30, the first power taking module 10 takes power from the front end of the live line L to supply power to the first electric module 30.

As shown in fig. 4, when the voltage of the zero line N is greater than the voltage of the live line L, a reverse current is input to the second power-taking module 20 from the front end point of the zero line N, sequentially flows through the fourth terminal P22, the fourth input terminal P25, the input terminal of the second dual-purpose module 40, the output terminal of the second dual-purpose module 40, the fourth output terminal P26 and the third terminal P21 in the second power-taking module 20, and then flows out to the rear end point of the live line L; then, the reverse current is input to the first power-taking module 10 from the rear end point of the live line L, sequentially flows through the second terminal P12, the second input terminal P15, the second output terminal P16 and the first terminal P11 in the second power-taking module 20, and then flows out to the front end point of the live line L. In the above process, since the reverse current flows from the second power taking module 20 through the second thermoelectric module 40, the function of the second power taking module 20 taking power from the neutral line N to supply power to the second thermoelectric module 40 is realized.

As shown in fig. 5, in some embodiments, the first power-taking module 10 includes a first unidirectional conducting element D1 and a second unidirectional conducting element D2, where:

the input end of the first unidirectional conducting element D1 is connected to the first input end P13, and the output end of the first unidirectional conducting element D1 is used for connecting to the input end of the first electrical module 30; the input terminal of the second unidirectional conducting element D2 is connected to the second input terminal P15, and the output terminal of the second unidirectional conducting element D2 is connected to the second output terminal P16.

When the voltage of the live line L is greater than the voltage of the neutral line N, a forward current flows into the first terminal P11, and at this time, since the first one-way conduction element D1 is in a conduction state and the second one-way conduction element D2 is in an off state, the forward current input from the first terminal P11 can only be output from the first input terminal P13 to the input terminal of the first one-way conduction element D1, the output terminal of the first one-way conduction element D1 outputs the forward current to the input terminal of the first electrical module 30, and the forward current cannot flow through the second one-way conduction element D2.

When the voltage of the neutral line N is greater than the voltage of the live line L, a reverse current flows from the rear end point of the live line L to the second terminal P12, at this time, the second one-way conduction element D2 is in a conduction state, and the first one-way conduction element D1 is in an off state, so that the reverse current input from the second terminal P12 can only flow from the second input terminal P15 to the input terminal of the second one-way conduction element D2, the output terminal of the second one-way conduction element D2 outputs the reverse current to the front end point of the live line via the first terminal P11, and the reverse current cannot flow from the first one-way conduction element D1.

Preferably, in some embodiments, the first power taking module 10 further includes a first energy storage capacitor C _n1 (ii) a A first energy storage capacitor C _n1 Is arranged to be connected between the output of the first unidirectional conducting element D1 and the input of the first electrical module 30, and a first energy-storage capacitor C _n1 Is adapted to be connected to the output of the first consumer module 30 and to the first outputP14.

When the voltage of the live line L is greater than the voltage of the zero line N, the forward current output from the output end of the first one-way conduction element D1 flows into the first energy storage capacitor C _n1 To the first energy storage capacitor C _n1 And charging is carried out.

In the above embodiments, the first energy storage capacitor C _n1 The first energy storage capacitor C can effectively store the electric energy taken by the first power taking module 10 from the front end point of the live wire line L _n1 The stored electric energy is released to the first electric module 30 for use, which is beneficial to improving the stability of supplying power to the first electric module 30.

As shown in fig. 5, in some embodiments, the second power-taking module 20 includes a third unidirectional conducting element D3 and a fourth unidirectional conducting element D4, where:

the input end of the third unidirectional conducting element D3 is connected to the third input end P23, and the output end of the third unidirectional conducting element D3 is connected to the third output end P24; an input end of the fourth unidirectional conducting element D4 is connected to the fourth input end P24, and an output end of the fourth unidirectional conducting element D4 is used for connecting to an input end of the second photovoltaic module 40.

When the voltage of the live line L is greater than the voltage of the neutral line N, a forward current flows from the rear end point of the live line L to the third terminal P21, and at this time, since the third unidirectional conductive element D3 is in a conductive state and the fourth unidirectional conductive element D4 is in an off state, the forward current input from the third terminal P21 can only be output from the third input terminal P23 to the input terminal of the third unidirectional conductive element D3, the output terminal of the third unidirectional conductive element D3 outputs a positive current to the neutral line through the fourth terminal P22, and the forward current cannot flow through the fourth unidirectional conductive element D4.

When the voltage of the neutral line N is greater than the voltage of the live line L, a reverse current flows into the fourth terminal P22, and at this time, the fourth one-way conduction element D4 is in a conduction state, and the third one-way conduction element D3 is in an off state, so that the reverse current input from the fourth terminal P22 can only flow into the input end of the fourth one-way conduction element D4 from the fourth input end P25, and the output end of the fourth one-way conduction element D4 outputs the reverse current to the input end of the second electrical module 40, and the reverse current cannot flow through the third one-way conduction element D3.

Preferably, in some embodiments, the second power-taking module 20 further includes a second energy-storing capacitor C _n2 (ii) a Second energy storage capacitor C _n2 Is used for being connected between the output end of the fourth unidirectional conducting element D4 and the input end of the second electrical module 40, and a second energy storage capacitor C _n2 For connection between the output of the second electrical module 40 and a fourth output P26.

When the voltage of the zero line N is greater than that of the live line L, the reverse current output from the output end of the fourth one-way conduction element D4 flows into the second energy storage capacitor C _n2 To the second energy-storage capacitor C _n2 And charging is carried out.

In the above embodiment, the second energy storage capacitor C _n2 The second energy storage capacitor C can effectively store the electric energy taken by the second electricity taking module 20 from the front end point of the zero line N _n2 The stored electric energy is released to the second thermoelectric module 40 for use, which is beneficial to improving the stability of supplying power to the second thermoelectric module 40.

It should be noted that the structural forms of the first unidirectional conducting element D1, the second unidirectional conducting element D2, the third unidirectional conducting element D3 and the fourth unidirectional conducting element D4 are not limited, for example, in some embodiments, at least one of the first unidirectional conducting element D1, the second unidirectional conducting element D2, the third unidirectional conducting element D3 and the fourth unidirectional conducting element D4 is a diode structure capable of unidirectional conducting.

Of course, in other embodiments, the structural form of the unidirectional conducting element may also be one of, but not limited to, a MOS switch tube and a voltage stabilizing switch tube (e.g., a TVS tube); when the one-way conduction element is an MOS (metal oxide semiconductor) switching tube, a preset control condition for driving the MOS switching tube to be conducted can be preset in the single live wire power circuit, and when the preset control condition is met, the MOS switching tube is controlled to be conducted; when the one-way conduction element is a voltage stabilizing switch tube, the voltage stabilizing switch tube is conducted when the conduction voltage of the voltage stabilizing switch tube is reached.

As shown in fig. 5, in some embodiments, the single live wire power supply circuit 100 further includes a loop control switch S1, where the loop control switch S1 is configured to be connected to a line between the first terminal P11 and the fourth terminal P22, and control the connection or disconnection between the live wire line L and the neutral wire line N.

It should be noted that the position where the loop control switch S1 is disposed is not limited, for example, in the present embodiment, the loop control switch S1 is disposed in the first power-taking module 10, and specifically, the loop control switch S1 is disposed at the parallel connection point of the first input end P13 and the second output end P16 between the first terminal P11. Of course, it is possible that the loop control switch is provided between the parallel connection point of the first output terminal and the second input terminal and the second terminal, or it is also possible that the loop control switch is provided in the second power-taking module.

In the above embodiment, when the loop control switch S1 controls the conduction between the live line L and the zero line N, the current flows in the ac loop, and at this time, the single live line power-taking circuit 100 can take power from the ac loop, and the power-taking function is started; when the loop control switch S1 controls the disconnection between the live line L and the neutral line N, no current flows in the ac loop, the single live line power-taking circuit 100 cannot take power, and the power-taking function is turned off. Through the setting, can get the demand of electricity according to the reality and carry out adaptability control to single fire electricity circuit 100, be favorable to saving the electric energy better, in addition, when the circuit breaks down, can stop to get the electricity function through loop control switch S1, avoid single fire to get electricity circuit 100 and still continue to get the electricity and cause more serious consequence when breaking down, improve the security that single fire got electricity circuit 100 and use.

The configuration of the loop control switch S1 is not limited, and for example, the loop control switch S1 is a mechanical control switch.

As shown in fig. 1 and 6, the single hot wire power taking system 600 of an embodiment includes the single hot wire power taking circuit 100 of any one of the embodiments, which may include various modifications, and for convenience of description, a specific structure of the single hot wire power taking system 600 is described below by taking one of the embodiments as an example, specifically:

the single hot wire electricity taking system 600 includes a single hot wire electricity taking circuit 100, a first electric module 30 and a second electric module 40, wherein:

the first electric module 30 is connected with the first electric module 10 of the single live wire electric circuit, and when the voltage of the live wire line L is greater than the voltage of the zero wire line N, the first electric module 30 is used for receiving electric energy obtained by the first electric module 10 from the live wire line L;

the second electrical module 40 is connected to the second power module 20 of the single live wire power circuit, and when the voltage of the zero line N is greater than the voltage of the live line L, the second electrical module 40 is configured to receive the electric energy obtained by the second power module 20 from the zero line N.

According to the single live wire power taking system 600, through the arrangement of the single live wire power taking circuit 100, the first power taking module 10 is used for taking power for the first electric module 30, and the second power taking module 20 is used for the second electric module 40, so that time sharing power taking from an alternating current loop can be realized, the on-off state of a load does not need to be considered during power taking, and the independence of realizing the power taking function of the power taking modules is effectively enhanced.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A single-fire electricity taking circuit is characterized by comprising a first electricity taking module and a second electricity taking module; the first power taking module comprises a first terminal and a second terminal, the first terminal is used for being connected with the front end point of the live wire circuit, and the second terminal is used for being connected with the rear end point of the live wire circuit; the second power taking module comprises a third terminal and a fourth terminal, the third terminal is used for being connected with the rear end point of the live line circuit, and the fourth terminal is used for being connected with the zero line circuit; wherein:

the first power supply module is used for being connected with an external first power module, and when the voltage of the live line is larger than the voltage of the zero line, power is supplied to the first power module from the front end point of the live line;

the second electricity taking module is used for being connected with an external second electricity using module, and when the voltage of the zero line is larger than that of the live line, electricity is taken from the zero line and then the second electricity using module is powered.

2. The single live wire power taking circuit of claim 1, wherein the first power taking module further comprises a first input end, a second input end, a first output end and a second output end; the first input end and the second output end are connected to the first terminal in parallel, and the first input end is used for being connected with the input end of the first electric module; the second input end and the first output end are connected to the second wiring end in parallel, and the first output end is used for being connected with the output end of the first electric module;

the second power taking module further comprises a third input end, a fourth input end, a third output end and a fourth output end; the third input end and the fourth output end are connected to the third wiring end in parallel, and the fourth output end is used for being connected with the output end of the second photovoltaic module; the fourth input end and the third output end are connected to the fourth wiring end in parallel, and the fourth output end is used for being connected with the input end of the second photovoltaic module.

3. The single live wire power taking circuit according to claim 2, wherein the first power taking module comprises a first one-way conduction element and a second one-way conduction element, wherein:

the input end of the first unidirectional conduction element is connected with the first input end, and the output end of the first unidirectional conduction element is used for being connected with the input end of the first electric module;

the input end of the second one-way conduction element is connected with the second input end, and the output end of the second one-way conduction element is connected with the second output end.

4. The single live wire power taking circuit according to claim 3, wherein the first power taking module further comprises a first energy storage capacitor; the first end of the first energy storage capacitor is used for being connected between the output end of the first unidirectional conduction element and the input end of the first electric module, and the second end of the first energy storage capacitor is used for being connected between the output end of the first electric module and the first output end.

5. The single live wire power taking circuit according to claim 2, wherein the second power taking module comprises a third unidirectional conduction element and a fourth unidirectional conduction element, wherein:

the input end of the third unidirectional conduction element is connected with the third input end, and the output end of the third unidirectional conduction element is connected with the third output end;

the input end of the fourth unidirectional conducting element is connected with the fourth input end, and the output end of the fourth unidirectional conducting element is used for being connected with the input end of the second electrical-use module.

6. The single live wire electricity taking circuit according to claim 5, wherein the second electricity taking module further comprises a second energy storage capacitor; the first end of the second energy storage capacitor is used for being connected between the output end of the fourth unidirectional conducting element and the input end of the second photovoltaic module, and the second end of the second energy storage capacitor is used for being connected between the output end of the second photovoltaic module and the fourth output end.

7. The single live wire power taking circuit according to claim 3 or 5, wherein at least one of the first unidirectional conducting element, the second unidirectional conducting element, the third unidirectional conducting element and the fourth unidirectional conducting element is one of a diode, an MOS switching tube and a voltage stabilizing switching tube.

8. The single live wire power-taking circuit according to claim 1, further comprising a loop control switch, wherein the loop control switch is connected to a line between the first terminal and the fourth terminal, and is used for controlling connection or disconnection between the live wire line and the zero wire line.

9. The single live wire power taking circuit according to claim 8, wherein the loop control switch is a mechanical control switch.

10. A single live wire electricity taking system, comprising the single live wire electricity taking circuit according to any one of claims 1 to 9, a first electrical module, and a second electrical module, wherein:

the first power taking module is connected with the first power taking module of the single live wire power taking circuit, and when the voltage of the live wire line is greater than the voltage of the zero wire line, the first power taking module is used for receiving electric energy obtained by the first power taking module from the live wire line;

the second thermoelectric module is connected with a second power taking module of the single live wire power taking circuit, and when the voltage of the zero line is greater than the voltage of the live wire line, the second thermoelectric module is used for receiving the electric energy acquired by the second power taking module from the zero line.

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