Control circuit, control method and electronic equipment

Abstract

The invention provides a control circuit, a control method and electronic equipment, and belongs to the technical field of circuits. The control circuit comprises a first branch and a second branch. The first branch comprises a first normally open switch and a first control coil which are coupled in series. The second branch comprises a second normally open switch and a second control coil which are coupled in series; wherein the first control coil is configured to control the opening or closing of the second normally open switch, and the second control coil is configured to control the opening or closing of the first normally open switch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit, and particularly relates to a control circuit, a control method and an electronic device. BACKGROUND

[0002] With the continuous development of science and technology, various electric devices have been widely used by people. The control circuit between the power grid and the electric device usually adopts an alternating current contactor and an intermediate relay. The intermediate relay in the control circuit cannot effectively control the alternating current contactor, which causes a security risk in the power consumption of the electric device.

[0003] Therefore, designing a control circuit to improve the power consumption safety of the electric device becomes a technical problem to be solved. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a control circuit, a control method and an electronic device to improve the power consumption safety of the electric device.

[0005] An embodiment of the first aspect of the present application provides a control circuit, the control circuit comprising a first branch and a second branch. The first branch comprises a first normally open switch and a first control coil coupled in series; the second branch comprises a second normally open switch and a second control coil coupled in series; wherein the first control coil is configured to control the opening or closing of the second normally open switch, and the second control coil is configured to control the opening or closing of the first normally open switch.

[0006] In the technical solution of the embodiment of the present application, the first control coil included in the first branch controls the opening or closing of the second normally open switch in the second branch, and the second control coil included in the second branch controls the opening or closing of the first normally open switch in the first branch, forming the interlocking of the first branch and the second branch, so that stable and reliable control of the electric device can be achieved.

[0007] In some embodiments, the first branch is coupled with a driving unit, and the driving unit is configured to provide a driving current to the first control coil to control the closing of the second normally open switch. By providing the driving current to the first control coil by the driving unit to control the closing of the second normally open switch, the starting process of the control circuit is simple and easy to implement.

[0008] In some embodiments, the first branch includes a control switch, the control switch is coupled in series with the first control coil and in parallel with the first normally-open switch, and is configured to, when closed, cause the drive current to flow through the first control coil. By providing the control switch in the first branch, the control circuit can be used to start working. The control switch is coupled in parallel with the first normally-open switch, so that after the first branch and the second branch are both turned on, the control switch does not affect the interlocking of the first branch and the second branch, thereby improving the reliability of the control circuit.

[0009] In some embodiments, the control circuit further includes a third normally-open switch, the third normally-open switch is coupled between the power supply and the electrical device, and is configured to be controlled to open or close by the second control coil. By controlling the opening or closing of the third normally-open switch coupled between the power supply and the electrical device by the second control coil, the control circuit can control the electrical device to stop working, and has a start-up delay effect during the start-up process of the control circuit, thereby reducing the probability of failure of the electrical device caused by premature power-on.

[0010] Embodiments of the second aspect of the application provide a control method applied to a control circuit, the control circuit including a first branch and a second branch, the first branch including a first normally-open switch and a first control coil coupled in series, and the second branch including a second normally-open switch and a second control coil coupled in series; wherein the first control coil is configured to control the opening or closing of the second normally-open switch, and the second control coil is configured to control the opening or closing of the first normally-open switch. The control method includes: coupling the first branch and the second branch with a power supply; providing a drive current to the first control coil to cause the first normally-open switch and the second normally-open switch to both close, and the loop formed by the first branch and the power supply and the loop formed by the second branch and the power supply to both be in communication.

[0011] In the technical solution of the embodiments of the application, by providing a drive current to the first control coil to control the loop formed by the first branch and the power supply and the loop formed by the second branch and the power supply to both be in communication, the start-up process of the control circuit is simple and easy to implement.

[0012] In some embodiments, the control method further includes: controlling any one of the first branch or the second branch to be uncoupled with the power supply to cause the first normally-open switch and the second normally-open switch to both open, and the loop formed by the first branch and the power supply and the loop formed by the second branch and the power supply to both be uncoupled. By controlling any one of the first branch or the second branch to be uncoupled with the power supply to cause the first normally-open switch and the second normally-open switch to both open, and the loop formed by the first branch and the power supply and the loop formed by the second branch and the power supply to both be uncoupled, the coupling between the control circuit and the power supply can be quickly cut off when the power supply is abnormal, thereby improving the safety of the control circuit.

[0013] In some embodiments, the control circuit further comprises a third normally open switch coupled between the power supply and the electrical device and configured to be controlled to be opened or closed by the second control coil, wherein, in response to the first branch and the power supply forming a loop and the second branch and the power supply forming a loop both being in communication, the third normally open switch is closed to couple the power supply and the electrical device, and the control method further comprises: controlling any one of the first branch or the second branch to be decoupled from the power supply, so that the third normally open switch is opened and the power supply and the electrical device are decoupled. By controlling any one of the first branch or the second branch to be decoupled from the power supply, the third normally open switch is opened, so that the coupling between the electrical device and the power supply can be quickly cut off in the event of power supply abnormality, thereby improving the electrical safety of the electrical device.

[0014] In some embodiments, the control of the coupling of the first branch and the second branch to the power supply comprises: controlling the coupling of the first branch and the second branch to the same power supply. The control of the coupling of the first branch and the second branch to the same power supply has a simple circuit structure and is easy to implement.

[0015] In some embodiments, the control of the coupling of the first branch and the second branch to the power supply comprises: controlling the coupling of the first branch and the second branch to different power supplies respectively, wherein the first branch is coupled to a backup power supply. The control of the coupling of the first branch and the second branch to different power supplies respectively and the coupling of the first branch to the backup power supply improves the stability of the control circuit under the condition of meeting the power supply demand.

[0016] Embodiments of the third aspect of the present application provide an electronic device comprising the control circuit in the foregoing embodiments or performing the control method in the foregoing embodiments.

[0017] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings, like reference numerals refer to same or similar functionalities throughout the several views. The drawings are not necessarily to scale. It is to be understood that the drawings only depict several embodiments in accordance with the present disclosure and should not be considered as limiting the scope of the present application.

[0019] Figure 1 A schematic diagram of a control circuit according to some embodiments of the present application;

[0020] Figure 2 A schematic diagram of another control circuit according to some embodiments of the present application;

[0021] Figure 3 schematic diagram of another control circuit for some embodiments of the present application;

[0022] Figure 4 flow chart of a control method for some embodiments of the present application;

[0023] Figure 5 flow chart of another control method for some embodiments of the present application.

[0024] Legend of reference signs:

[0025] 1000, control circuit;

[0026] 100, first branch; 110, first normally open switch; 120, first control coil; 130, control switch; 200, second branch; 210, second normally open switch; 220, second control coil; 310, third normally open switch; 320, power supply; 330, power consuming device. DETAILED DESCRIPTION

[0027] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0030] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are an "or" relationship.

[0032] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0033] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0034] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] With the continuous development of science and technology, various electric devices have been widely used by people. The control circuit between the power supply and the electric device includes an AC contactor and an intermediate relay for controlling the state of the AC contactor. The above control circuit has simple structure and single function, but has safety hazards. For example, when the power supply is abnormal, it is necessary to disconnect the electrical connection between the power supply and the electric device. Since the AC contactor and the intermediate relay cannot be interlocked, after the AC contactor is powered off, the normally open switch in the intermediate relay cannot be disconnected, which will cause the electrical connection between the AC contactor and the electric device to be unable to be disconnected, and after the power supply is repaired, the electric device will be directly powered on without restarting, which will cause a certain degree of damage to the electric device.

[0036] Based on this, the embodiment of the present application discloses a control circuit, by adopting the first control coil included in the first branch to control the opening or closing of the second normally open switch in the second branch, the second control coil included in the second branch controls the opening or closing of the first normally open switch in the first branch, forming the interlocking of the first branch and the second branch, so as to realize the stable and reliable control of the electric equipment.

[0037] The control circuit disclosed by the embodiment of the present application can be used in the control of the electric equipment including mobile phones, tablet computers, vehicle-mounted devices, augmented reality (AR) devices, virtual reality (VR) devices, ultra-mobile personal computers (UMPC), netbooks, servers, etc., but is not limited to this.

[0038] The embodiment of the present application provides a control circuit, Figure 1 A schematic diagram of a control circuit of some embodiments of the present application, Figure 2 A schematic diagram of another control circuit of some embodiments of the present application, Figure 3 A schematic diagram of another control circuit of some embodiments of the present application, as Figures 1 to 3 The control circuit 1000 includes a first branch 100 and a second branch 200. The first branch 100 includes a first normally open switch 110 and a first control coil 120 coupled in series; the second branch 200 includes a second normally open switch 210 and a second control coil 220 coupled in series; wherein the first control coil 120 is configured to control the opening or closing of the second normally open switch 210, and the second control coil 220 is configured to control the opening or closing of the first normally open switch 110.

[0039] In the example, the positions of the first normally open switch 110 and the first control coil 120 in the first branch 100 are not limited, as long as they are coupled in series. Similarly, the positions of the second normally open switch 210 and the second control coil 220 in the second branch 200 are not limited, as long as they are coupled in series.

[0040] In the example, the process of the control coil controlling the opening or closing of the normally open switch can be: when there is no current flowing through the control coil, the control coil controls the normally open switch to open; when there is current flowing through the control coil, the suction force generated by the control coil controls the normally open switch to close.

[0041] In an example, before the control circuit 1000 starts to work, the first normally open switch 110 and the second normally open switch 210 are both in the open state. At this time, the control circuit 1000 can be started to work, and the specific process can be: providing a driving current to the first control coil 120, the first control coil 120 has current flowing therethrough, the suction force generated by the first control coil 120 causes the second normally open switch 210 to close, and the second normally open switch 210 and the second branch 200 where the second control coil 220 is located are in the conductive state. The second branch 200 is in the conductive state, and the second control coil 220 has current flowing therethrough, the suction force generated by the second control coil 220 causes the first normally open switch 110 to close, and the first normally open switch 110 and the first branch 100 where the first control coil 120 is located are in the conductive state.

[0042] In an example, during the working process of the control circuit 1000, the first normally open switch 110 and the second normally open switch 210 are both in the closed state. In one embodiment, the first branch 100 is switched from the conductive state to the open state, the first control coil 120 has no current flowing therethrough, and the first control coil 120 controls the second normally open switch 210 to open; the second normally open switch 210 is opened, and the second branch 200 is switched from the conductive state to the open state, the second control coil 220 has no current flowing therethrough, and the second control coil 220 controls the first normally open switch 110 to open. In another embodiment, the second branch 200 is switched from the conductive state to the open state, the second control coil 220 has no current flowing therethrough, and the second control coil 220 controls the first normally open switch 110 to open; the first normally open switch 110 is opened, and the first branch 100 is switched from the conductive state to the open state, the first control coil 120 has no current flowing therethrough, and the first control coil 120 controls the second normally open switch 210 to open.

[0043] In the embodiments of the present application, the first control coil 120 included in the first branch 100 controls the opening or closing of the second normally open switch 210 in the second branch 200, and the second control coil 220 included in the second branch 200 controls the opening or closing of the first normally open switch 110 in the first branch 100, forming the interlocking of the first branch 100 and the second branch 200, so as to realize the stable and reliable control of the electric equipment 330.

[0044] According to some embodiments of the present application, the first branch 100 is coupled with a driving unit, and the driving unit is configured to provide a driving current to the first control coil 120 to control the closing of the second normally open switch 210.

[0045] In one embodiment, the driving unit can be a power supply 320 (such as a power supply) of the control circuit 1000. Figure 3As shown), the first branch 100 is coupled to the power supply 320. When the loop formed by the control coil in the first branch 100 and the power supply 320 is connected, the power supply 320 can provide a driving current to the first control coil 120. The suction force generated by the first control coil 120 causes the second normally open switch 210 to close.

[0046] In another embodiment, the driving power source may be a current source coupled in series with the first control coil 120 . The current source may provide a driving current to the first control coil 120 . The suction force generated by the first control coil 120 closes the second normally open switch 210 .

[0047] In the embodiment of the present application, a driving unit is used to provide a driving current to the first control coil 120 to control the closing of the second normally open switch 210, so that the startup process of the control circuit 1000 is simple and easy to implement.

[0048] According to some embodiments of the present application, Figure 2 As shown, the first branch 100 includes a control switch 130 , which is coupled in series with the first control coil 120 and in parallel with the first normally-open switch 110 , and is configured to allow a driving current to flow through the first control coil 120 when closed.

[0049] In an example, the control switch 130 may be any switch such as a dip switch, a touch switch, or the like.

[0050] In this example, when the control switch 130 is closed, the control switch 130 and the first control coil 120 are in a conductive state. A driving current flows through the first control coil 120, and the current flows through the first control coil 120. The suction force generated by the first control coil 120 closes the second normally-open switch 210. Accordingly, the second branch 200, where the second normally-open switch 210 and the second control coil 220 are located, is in a conductive state. Current flows through the second control coil 220, and the suction force generated by the second control coil 220 closes the first normally-open switch 110. Consequently, the first branch 100, where the first normally-open switch 110 and the first control coil 120 are located, is in a conductive state. After both the first branch 100 and the second branch 200 are conductive, the control switch 130 can be opened.

[0051] In the embodiment of the present application, a control switch 130 is provided in the first branch 100 to drive the control circuit 1000 to start operation. The control switch 130 is coupled in parallel with the first normally-open switch 110, so that after both the first branch 100 and the second branch 200 are turned on, the control switch 130 does not affect the interlocking of the first branch 100 and the second branch 200, thereby improving the reliability of the control circuit 1000.

[0052] According to some embodiments of the present application, as shown in Figure 3 The control circuit 1000 further includes a third normally open switch 310 coupled between the power supply 320 and the electrical device 330 and configured to be controlled to open or close by the second control coil 220.

[0053] In an example, the power supply 320 can be a direct current power supply or an alternating current power supply.

[0054] In an example, the electrical device 330 can be a household electrical device (e.g., a television, a washing machine, a refrigerator, a computer, etc.) or an electrical device used in industrial production (e.g., a cooling fan, a heater, a chemical conversion device, etc.), which is not specifically limited in the embodiments of the present disclosure.

[0055] In an example, before the control circuit 1000 is started, the first normally open switch 110, the second normally open switch 210, and the third normally open switch 310 are all in an open state. The specific process of starting the control circuit 1000 to work can be: providing a driving current to the first control coil 120, the current flows through the first control coil 120, the suction force generated by the first control coil 120 makes the second normally open switch 210 close, and the second normally open switch 210 and the second control coil 220 located in the second branch 200 are in a conduction state. The second control coil 220 has current flowing through it when the second branch 200 is in a conduction state, the suction force generated by the second control coil 220 makes the first normally open switch 110 and the third normally open switch 310 close, the first normally open switch 110 closes, and the first branch 100 in which the first normally open switch 110 and the first control coil 120 are located is in a conduction state, and the third normally open switch 310 closes, and the power supply 320 and the electrical device 330 are in a conduction state.

[0056] In an example, during the working process of the control circuit 1000, the first normally open switch 110, the second normally open switch 210 and the third normally open switch 310 are all in the closed state. In one embodiment, the first branch 100 is switched from the conducting state to the disconnected state, no current flows through the first control coil 120, and the first control coil 120 controls the second normally open switch 210 to be disconnected. The second normally open switch 210 is disconnected, and the second branch 200 is switched from the conducting state to the disconnected state, no current flows through the second control coil 220, the second control coil 220 controls the first normally open switch 110 and the third normally open switch 310 to be disconnected, and the third normally open switch 310 is disconnected, so that the coupling between the power supply 320 and the electrical equipment 330 is disconnected. In another embodiment, the second branch 200 is switched from the conducting state to the disconnected state, no current flows through the second control coil 220, the second control coil 220 controls the first normally open switch 110 and the third normally open switch 310 to be disconnected, and the third normally open switch 310 is disconnected, so that the coupling between the power supply 320 and the electrical equipment 330 is disconnected. The first normally open switch 110 is disconnected, the first branch 100 is switched from the conducting state to the disconnected state, no current flows through the first control coil 120, and the first control coil 120 controls the second normally open switch 210 to be disconnected.

[0057] In the embodiments of the present application, the second control coil 220 controls the disconnection or closure of the third normally open switch 310 coupled between the power supply 320 and the electrical equipment 330, the control circuit 1000 can control the electrical equipment 330 to stop working, and has a start-up delay effect during the start-up process of the control circuit 1000, thereby reducing the probability of failure of the electrical equipment 330 caused by premature power-on.

[0058] According to another aspect of the present application, a control method is provided, which is applied to a control circuit, the control circuit comprising a first branch and a second branch, the first branch comprising a first normally open switch and a first control coil coupled in series, and the second branch comprising a second normally open switch and a second control coil coupled in series; wherein the first control coil is configured to control the disconnection or closure of the second normally open switch, and the second control coil is configured to control the disconnection or closure of the first normally open switch.

[0059] Figure 4 A flowchart of a control method for some embodiments of the present application. As shown in FIG. 4, the control method comprises: step S410, coupling the first branch and the second branch with the power supply; and step S420, providing a driving current to the first control coil to make the first normally open switch and the second normally open switch both closed, and the loop composed of the first branch and the power supply and the loop composed of the second branch and the power supply both communicated. Figure 4

[0060] In step S410, the first branch and the second branch are coupled with the power supply.​

[0061] In an example, the power supply can be an alternating current power supply, or a direct current power supply with a preset voltage value, or both. Figure 3 The power supply 320 is shown in FIG. 1.

[0062] In one embodiment, the first branch and the second branch can be coupled with the same power supply. In another embodiment, the first branch and the second branch can be coupled with different power supplies respectively. The first branch and the second branch can be the first branch 100 and the second branch 200 shown in FIG. 1. Figure 1

[0063] In step S420, a driving current is provided to the first control coil to make the first normally open switch and the second normally open switch both closed, and the first branch and the second branch both communicate with the loop formed by the power supply.

[0064] In an example, the driving current can be provided to the first control coil by the power supply, or by an external driving unit. When the driving current is provided to the first control coil, the current flows through the first control coil, and the suction force generated by the first control coil makes the second normally open switch closed, and the second branch communicates with the loop formed by the power supply. The current flows through the second control coil, and the suction force generated by the second control coil makes the first normally open switch closed, and the first branch communicates with the loop formed by the power supply. The first control coil can be the first control coil 120 shown in FIG. 1, and the first normally open switch and the second normally open switch can be the first normally open switch 110 and the second normally open switch 210 shown in FIG. 1. Figure 1 Figure 1

[0065] In the embodiments of the present application, the driving current is provided to the first control coil to control the first branch and the second branch to communicate with the loop formed by the power supply, so that the starting process of the control circuit is simple and easy to implement.

[0066] According to some embodiments of the present application, the control method further includes: controlling any one of the first branch or the second branch to be decoupled from the power supply, so that the first normally open switch and the second normally open switch are both opened, and the first branch and the second branch are both disconnected from the loop formed by the power supply.

[0067] ​​​In one embodiment, during normal operation, the first and second normally open switches are both closed. The first branch is decoupled from the power supply, and the loop formed by the first branch and the power supply is switched from a connected state to a disconnected state. At this time, no current flows through the first control coil, and the first control coil controls the second normally open switch to open. When the second normally open switch opens, the loop formed by the second branch and the power supply is switched from a connected state to a disconnected state, and no current flows through the second control coil. The second control coil controls the first normally open switch to open. Figure 1 The first and second normally open switches can be the first normally open switch 110 and the second normally open switch 210 as shown in FIG. 1B, and the power supply can be the power supply 320 as shown in FIG. 1C. Figure 1 The first and second normally open switches can be the first normally open switch 110 and the second normally open switch 210 as shown in FIG. 1B, and the power supply can be the power supply 320 as shown in FIG. 1C. Figure 3 The first and second normally open switches can be the first normally open switch 110 and the second normally open switch 210 as shown in FIG. 1B, and the power supply can be the power supply 320 as shown in FIG. 1C.

[0068] In another embodiment, the second branch is decoupled from the power supply, and the loop formed by the second branch and the power supply is switched from a connected state to a disconnected state. At this time, no current flows through the second control coil, and the second control coil controls the first normally open switch to open. When the first normally open switch opens, the loop formed by the first branch and the power supply is switched from a connected state to a disconnected state, and no current flows through the first control coil. The first control coil controls the second normally open switch to open.

[0069] In the embodiments of the present application, by controlling any one of the first branch or the second branch to be decoupled from the power supply, the first and second normally open switches are both opened, and the loops formed by the first branch and the power supply and by the second branch and the power supply are both disconnected. Thus, when the power supply is abnormal, the coupling between the control circuit and the power supply can be quickly disconnected, and the safety of the control circuit is improved.

[0070] According to some embodiments of the present application, the control circuit further includes a third normally open switch coupled between the power supply and the electrical device and configured to be controlled by the second control coil to open or close. In response to the loops formed by the first branch and the power supply and by the second branch and the power supply both being connected, the third normally open switch is closed to couple the power supply and the electrical device. The control method further includes controlling any one of the first branch or the second branch to be decoupled from the power supply, so that the third normally open switch is opened and the power supply and the electrical device are decoupled.

[0071] In an example, the first control coil is supplied with a driving current, the first control coil is electrified, the suction force generated by the first control coil makes the second normally open switch close, accordingly, the second branch is in communication with the loop formed by the power supply, the second control coil is electrified, the suction force generated by the second control coil makes the first normally open switch and the third normally open switch close, accordingly, the first branch is in communication with the loop formed by the power supply, and the third normally open switch couples the power supply and the electrical equipment. The third normally open switch can be the third normally open switch 310 as shown in Figure 3 The power supply and the electrical equipment can be the power supply 320 and the electrical equipment 330 as shown in Figure 3

[0072] In an embodiment, the first branch is controlled to be decoupled from the power supply, the loop formed by the first branch and the power supply is switched from the communication state to the disconnected state, at this time, no current flows through the first control coil, and the first control coil controls the second normally open switch to be open. The second normally open switch is open, the loop formed by the second branch and the power supply is switched from the communication state to the disconnected state, no current flows through the second control coil, the second control coil controls the first normally open switch and the third normally open switch to be open, and the third normally open switch is open to decouple the power supply from the electrical equipment.

[0073] In another embodiment, the second branch is controlled to be decoupled from the power supply, the loop formed by the second branch and the power supply is switched from the communication state to the disconnected state, at this time, no current flows through the second control coil, the second control coil controls the first normally open switch and the third normally open switch to be open, and the third normally open switch is open to decouple the power supply from the electrical equipment. The first normally open switch is open, the loop formed by the first branch and the power supply is switched from the communication state to the disconnected state, no current flows through the first control coil, and the first control coil controls the second normally open switch to be open.

[0074] In the embodiments of the present application, any one of the first branch or the second branch is controlled to be decoupled from the power supply to make the third normally open switch open, so that the coupling between the electrical equipment and the power supply can be quickly cut off when the power supply is abnormal, and the electrical safety of the electrical equipment is improved.

[0075] According to some embodiments of the present application, the control of the coupling of the first branch and the second branch to the power supply includes: controlling the coupling of the first branch and the second branch to the same power supply.

[0076] In an example, the power supply can be an alternating current power supply or a direct current power supply with a preset voltage value.

[0077] In the embodiments of the present application, the first branch and the second branch are controlled to be coupled to the same power supply, and the circuit structure is simple and easy to implement.

[0078] ​According to some embodiments of the present application, the controlling the first branch and the second branch to be coupled with the power supply includes: controlling the first branch and the second branch to be coupled with different power supplies respectively, wherein the first branch is coupled with a backup power supply.

[0079] In an example, the backup power supply can be a fire power supply or a backup battery. The backup power supply is more stable than the rest of the power supplies such as an alternating current power supply.

[0080] In an example, the second branch can be coupled with an alternating current power supply or a direct current power supply with a preset voltage value to meet the actual power supply demand of the control circuit. For example, Figure 3 As shown in the example, the first branch is coupled with a backup power supply, and the second branch is coupled with an alternating current power supply.

[0081] In the embodiments of the present application, the first branch and the second branch are controlled to be coupled with different power supplies respectively, and the first branch is coupled with a backup power supply. In the case of meeting the power supply demand, the stability of the control circuit is improved.

[0082] According to another aspect of the present application, an electronic device is also provided, which includes the control circuit in the foregoing embodiments or performs the control method in the foregoing embodiments.

[0083] In an example, the electronic device includes but is not limited to a mobile phone, a tablet computer, a vehicle-mounted device, an AR device, a VR device, a UMPC, a netbook, a server, etc., and the present application is not limited thereto.

[0084] It should be understood that although each step in the flowchart involved in each of the above embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each of the above embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0085] The technical solutions of the present application will be further described below through some specific embodiments.

[0086] For example, Figures 1 to 3As shown, the control circuit 1000 includes a first normally open switch 110, a first control coil 120, a second normally open switch 210, a second control coil 220, and a third normally open switch 310. The first branch 100 includes the first normally open switch 110 and the first control coil 120 coupled in series; the second branch 200 includes the second normally open switch 210 and the second control coil 220 coupled in series; the third normally open switch 310 is coupled between the power supply 320 and the electrical device 330; wherein the first control coil 120 is configured to control the opening or closing of the second normally open switch 210, and the second control coil 220 is configured to control the opening or closing of the first normally open switch 110 and the third normally open switch 310.

[0087] In one embodiment, the first branch 100 is coupled with a driving unit, and the driving unit is configured to provide a driving current to the first control coil 120 to control the closing of the second normally open switch 210.

[0088] In another embodiment, the first branch 100 includes a control switch 130 coupled in series with the first control coil 120 and in parallel with the first normally open switch 110, and configured to flow the driving current through the first control coil 120 when closed.

[0089] Figure 5 A flowchart of another control method for some embodiments of the present application. As shown, Figure 5 the control method includes:

[0090] Step S510, coupling the first branch and the second branch with different power supplies respectively, wherein the first branch is coupled with a backup power supply.

[0091] Step S520, providing a driving current to the first control coil to close the first normally open switch, the second normally open switch, and the third normally open switch, and to make the first branch and the second branch communicate with the loops formed by the power supplies.

[0092] Step S530, controlling any one of the first branch or the second branch to be uncoupled with the power supply to open the first normally open switch, the second normally open switch, and the third normally open switch, and to make the first branch and the second branch uncoupled with the loops formed by the power supplies, and to uncouple the power supply and the electrical device.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A control circuit, characterized by Comprise: a first branch comprising a first normally open switch and a first control coil coupled in series; a second branch comprising a second normally open switch and a second control coil coupled in series; wherein the first control coil is configured to control opening or closing of the second normally open switch, and the second control coil is configured to control opening or closing of the first normally open switch.

2. The control circuit of claim 1, wherein, The first branch is coupled with a driving unit configured to provide a driving current to the first control coil to control closing of the second normally open switch.

3. The control circuit of claim 2, wherein, The first branch comprises a control switch coupled in series with the first control coil and in parallel with the first normally open switch, and configured to, when closed, cause the driving current to flow through the first control coil.

4. The control circuit according to any one of claims 1 to 3, characterized in that, The control circuit further comprises a third normally open switch coupled between a power supply and an electrical device, and configured to be controlled by the second control coil to open or close.

5. A control method characterized by, The control method applied to a control circuit, the control circuit comprising: a first branch comprising a first normally open switch and a first control coil coupled in series; a second branch comprising a second normally open switch and a second control coil coupled in series; wherein the first control coil is configured to control opening or closing of the second normally open switch, and the second control coil is configured to control opening or closing of the first normally open switch, the control method comprising: controlling the first branch and the second branch to be coupled with a power supply; and providing a driving current to the first control coil to cause the first normally open switch and the second normally open switch to be both closed, and a loop composed of the first branch and the power supply and a loop composed of the second branch and the power supply to be both communicated.

6. The control method according to claim 5, characterized by The method further comprises: controlling any one of the first branch or the second branch to be decoupled with the power supply to cause the first normally open switch and the second normally open switch to be both opened, and the loop composed of the first branch and the power supply and the loop composed of the second branch and the power supply to be both disconnected.

7. The method of claim 5, wherein, The control circuit further comprises a third normally open switch coupled between the power supply and an electrical device, configured to be controlled by the second control coil to open or close, wherein, in response to the loop composed of the first branch and the power supply and the loop composed of the second branch and the power supply being both communicated, the third normally open switch is closed to couple the power supply with the electrical device, the method further comprises: controlling any one of the first branch or the second branch to be decoupled with the power supply to cause the third normally open switch to be opened, and the power supply to be decoupled with the electrical device.

8. The method according to any one of claims 5 to 7, characterized in that, The controlling the first branch and the second branch to be coupled with a power supply comprises: controlling the first branch and the second branch to be coupled with the same power supply.

9. The method according to any one of claims 5 to 7, characterized in that, The controlling the first branch and the second branch to be coupled with a power supply comprises: Controlling the first branch and the second branch to be coupled with different power supply respectively, wherein the first branch is coupled with a backup power supply.

10. An electronic device, comprising: The control circuit according to any one of claims 1 to 4 or the control method according to any one of claims 5 to 9.

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