A reverse connection self-correcting circuit and electric equipment

Abstract

The present invention discloses a reverse connection self-correction circuit and an electric device. The circuit includes: a first switch module, whose first input and third input are connected to the second line of the power supply, whose second input and second output are connected to the first line of the power supply, whose first output is connected to the negative terminal of the load, and is used to control its first input or second input to selectively conduct with the first output according to the polarity of the first line and the second line; a second switch module, whose first input and second output are connected to the second line of the power supply, whose second input and third input are connected to the first line of the power supply, and whose first output is connected to the positive terminal of the load, and is used to control its first input or second input to selectively conduct with the first output according to the polarity of the first line and the second line. Through the present invention, automatic correction after reverse connection can be achieved, ensuring that the load can always be used normally.

Description

Technical Field

[0001] The present invention relates to the field of electronic power technology, and in particular to a reverse connection self-correcting circuit and an electric device. Background Art

[0002] When commonly used polarity loads such as semiconductor devices, sensor devices or communication devices are connected to the two wires of the power supply, the polarity matching requirements must be met. When the above polarity loads are reversely connected to the two wires of the power supply, the polarity loads will not work properly, and in serious cases, they may be damaged. For example, in the actual testing and development of wireless communication mesh networks, it is found that when the positive and negative poles of the power lines of communication devices are reversed, it is easy to cause the controller motherboard to not work properly or the communication device to be damaged. The existing anti-reverse connection circuit does not conduct after the reverse connection, which can protect the load, but cannot automatically correct the reverse connection, affecting the normal use of the load.

[0003] With regard to the problem that the reverse connection cannot be automatically corrected in the prior art, thus affecting the normal use of the load, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a reverse connection self-correcting circuit and an electrical device to solve the problem in the prior art that reverse connection correction cannot be performed automatically, thus affecting the normal use of the load.

[0005] In order to solve the above technical problems, the present invention provides a reverse connection self-correction circuit, wherein the circuit comprises:

[0006] a first switch module, wherein the first input terminal and the third input terminal are connected to the second line of the power supply, the second input terminal and the second output terminal are connected to the first line of the power supply, and the first output terminal is connected to the negative terminal of the load, and the first switch module is used to control the first input terminal or the second input terminal thereof to selectively conduct with the first output terminal according to the polarity of the first line and the second line;

[0007] A second switch module, whose first input and second output are connected to the second line of the power supply, whose second input and third input are connected to the first line of the power supply, and whose first output is connected to the positive terminal of the load, is used to control its own first input or second input to selectively conduct with the first output according to the polarity of the first line and the second line.

[0008] Further, the first switch module is specifically used to: when the polarity of the first line is positive and the polarity of the second line is negative, it is powered off, thereby controlling the first input end and the first output end thereof to be connected; when the polarity of the second line is positive and the polarity of the first line is negative, it is powered on, thereby controlling the second input end and the first output end thereof to be connected;

[0009] The second switch module is specifically used to: turn on the power when the polarity of the first line is positive and the polarity of the second line is negative, thereby controlling the second input terminal and the first output terminal to be connected; and turn off the power when the polarity of the second line is positive and the polarity of the first line is negative, thereby controlling the first input terminal and the first output terminal to be connected.

[0010] Further, the first switch module includes a first relay, the first relay includes a first coil, a first armature, a first contact, a second contact and a third contact, the input end of the first coil is connected to the second line of the power supply, the output end is connected to the first line of the power supply through a first unidirectional conductive element, the first contact is connected to the negative terminal D of the load, the second contact is connected to the second line of the power supply, the third contact is connected to the first line of the power supply, and the first armature is used to control the conduction between the first contact and the second contact, or the conduction between the first contact and the third contact;

[0011] The second switch module includes a second relay, which includes a second coil, a second armature, a fourth contact, a fifth contact and a sixth contact. The input end of the second coil is connected to the first line of the power supply through a second unidirectional conductive element, and the output end is connected to the second line of the power supply. The fourth contact is connected to the positive terminal of the load, the fifth contact is connected to the second line of the power supply, and the sixth contact is connected to the first line of the power supply. The second armature is used to control conduction between the fourth contact and the fifth contact, or conduction between the fourth contact and the sixth contact.

[0012] Further, the second contact is a normally closed contact in the first relay, and the fifth contact is a normally closed contact in the second relay.

[0013] Furthermore, the anode of the first unidirectional conductive element is connected to the output end of the first coil, and the cathode of the first unidirectional conductive element is connected to the first line of the power supply; the anode of the second unidirectional conductive element is connected to the first line of the power supply, and the cathode is connected to the input end of the second coil.

[0014] Further, the first switch module further includes: a first resistor, arranged between the second line of the power supply and the input end of the first coil;

[0015] The second switch module further includes: a second resistor, which is arranged between the output end of the second coil and the second line of the power supply.

[0016] Furthermore, the first switch module further includes: a third unidirectional conductive element, a cathode of which is connected between the first resistor and the input end of the first coil, and an anode of which is connected between the output end of the first coil and the first unidirectional conductive element;

[0017] The second switch module further includes: a fourth unidirectional conductive element, an anode of which is connected between the output end of the second coil and the second resistor, and a cathode of which is connected between the second unidirectional conductive element and the input end of the second coil.

[0018] Further, the first unidirectional conducting element, the second unidirectional conducting element, the third unidirectional conducting element and the fourth unidirectional conducting element are diodes.

[0019] The present invention also provides an electrical device, including a load, and the electrical device also includes the above-mentioned reverse connection self-correction circuit.

[0020] Furthermore, the electrical device is a wireless communication device.

[0021] By applying the technical solution of the present invention, a first switch module and a second switch module are set between the power line and the load, and the on and off states of the first switch module and the second switch module are controlled according to the polarities of the first line and the second line, so as to control the positive and negative terminals of the load to be accurately connected with the two lines of the power supply, thereby realizing automatic correction after reverse connection and ensuring that the load can always be used normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural diagram of a reverse connection self-correcting circuit according to an embodiment of the present invention;

[0023] Figure 2 is a structural diagram of a reverse connection self-correcting circuit according to another embodiment of the present invention;

[0024] Figure 3 4 is a conduction timing diagram of a relay and a load according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0027] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] It should be understood that although the terms first, second, etc. may be used to describe the switch modules in the embodiments of the present invention, the switch modules should not be limited to these terms. These terms are only used to distinguish different switch modules. For example, without departing from the scope of the embodiments of the present invention, the first switch module may also be referred to as the second switch module, and similarly, the second switch module may also be referred to as the first switch module.

[0029] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0030] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0031] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] This embodiment provides a reverse connection self-correcting circuit. Figure 1 : is a structural diagram of a reverse connection self-correcting circuit according to an embodiment of the present invention, as shown in FIG. Figure 1 As shown, the circuit includes:

[0034] A first switch module 10, wherein the first input terminal a1 is connected to the second line B of the power supply, the second input terminal b1 is connected to the first line A of the power supply, the third input terminal c1 is connected to the second line B of the power supply, the first output terminal d1 is connected to the negative terminal D of the load, and the second output terminal e1 is connected to the first line A of the power supply. The first switch module 10 is used to switch the on-off state according to the polarity of the first line A and the second line B of the power supply, that is, to switch the conduction state between the third input terminal c1 and the second output terminal e1, and then control the first input terminal a1 or the second input terminal b1 of the first switch module 10 to selectively conduct with the first output terminal d1; the circuit also includes The second switch module 20, the first input terminal a2 of the second switch module 20 is connected to the second line B of the power supply, the second input terminal b2 is connected to the first line A of the power supply, the third input terminal c2 is connected to the first line A of the power supply, the first output terminal d2 is connected to the positive terminal C of the load, and the second output terminal e2 is connected to the second line B of the power supply. The first switch module is used to switch the on-off state according to the polarity of the first line A and the second line B of the power supply, that is, to switch the conduction state between the third input terminal c2 and the second output terminal e2, and then control its own first input terminal a2 or the second input terminal b2 to selectively conduct with the first output terminal d2.

[0035] In a specific implementation, before power-on, the first switch module 10 and the second switch module 20 are both in a power-off state. After power-on for a period of time, the polarity of the first line A and the second line B of the power supply determines the direction of the current in the circuit, thereby determining the on and off states of the first switch module 10 and the second switch module 20, and ultimately determining which line the positive terminal C of the load is connected to and which line the negative terminal D of the load is connected to.

[0036] The reverse connection self-correction circuit of this embodiment, by setting the first switch module 10 and the second switch module 20 between the power line and the load, controls the on and off states of the first switch module 10 and the second switch module 20 according to the polarity of the first line A and the second line B, and further controls the positive and negative terminals D of the load to be accurately connected to the two lines of the power supply, so as to realize automatic correction after reverse connection and ensure that the load can always be used normally.

[0037] Example 2

[0038] This embodiment provides another reverse connection self-correcting circuit. Figure 2 FIG. 1 is a structural diagram of a reverse connection self-correcting circuit according to another embodiment of the present invention. In order to match the two lines of the power supply with the positive and negative terminals D of the load respectively, as shown in FIG. Figure 2As shown, in this embodiment, the first switch module 10 is powered off when the polarity of the first line A of the power supply is positive and the polarity of the second line B is negative, and the third input terminal c1 is disconnected from the second output terminal e1, thereby controlling the first input terminal a1 of the first switch module 10 to be connected to the first output terminal d1. Since the first input terminal a1 of the first switch module 10 is connected to the second line B, and the first output terminal d1 is connected to the negative terminal D of the load, the above scheme ensures that the second line B with a negative polarity is connected to the negative terminal D of the load; the first switch module 10 is powered on when the polarity of the second line B of the power supply is positive and the polarity of the first line A is negative, and the third input terminal c1 is connected to the second output terminal e1, thereby controlling the second input terminal b1 of the first switch module 10 to be connected to the first output terminal d1. Since the second input terminal b1 of the first switch module 10 is connected to the first line A, and the first output terminal d1 is connected to the negative terminal D of the load, the above scheme ensures that the first line A with a negative polarity is connected to the negative terminal D of the load.

[0039] Similarly, the second switch module 20 is powered on when the polarity of the first line A of the power supply is positive and the polarity of the second line B is negative, and the third input terminal c2 and the second output terminal e2 are connected, thereby controlling the second input terminal b2 and the first output terminal d2 to be connected. Since the second input terminal b2 of the second switch module 20 is connected to the first line A and the first output terminal d2 is connected to the positive terminal C of the load, the above scheme ensures that the first line A with a positive polarity is connected to the positive terminal C of the load; the second switch module 20 is powered off when the polarity of the second line B of the power supply is positive and the polarity of the first line A is negative, and the third input terminal c2 and the second output terminal e2 are connected, thereby controlling the first input terminal a2 and the first output terminal d2 to be connected. Since the first input terminal a2 of the second switch module 20 is connected to the second line B and the first output terminal d2 is connected to the positive terminal C of the load, the above scheme ensures that the second line B with a positive polarity is connected to the positive terminal C of the load.

[0040] In order to make the first switch module 10 de-energized when the polarity of the first line A of the power supply is positive and the polarity of the second line B is negative, and energized when the polarity of the second line B of the power supply is positive and the polarity of the first line A is negative, the first switch module 10 specifically includes a first relay KM1, and the first relay KM1 includes a first coil T1, a first armature L1, a first contact 1, a second contact 2 and a third contact 3. The input end of the first coil T1 is connected to the second line B of the power supply, and the output end is connected to the first line A of the power supply through a first unidirectional conductive element D1. The first contact 1 is connected to the negative terminal D of the load, the second contact 2 is connected to the second line B of the power supply, and the third contact 3 is connected to the first line A of the power supply. The first armature L1 is used to control the conduction between the first contact 1 and the second contact 2, or the conduction between the first contact 1 and the third contact 3, wherein the second contact 2 is a normally closed contact, and when the first coil T1 is de-energized, the second contact 2 is conductive with the first contact 1. The anode of the first unidirectional conductive element D1 is connected to the output end of the first coil T1 , and the cathode is connected to the first line A of the power source.

[0041] Similarly, in order to make the second switch module 20 energized when the polarity of the first line A of the power supply is positive and the polarity of the second line B is negative, and de-energized when the polarity of the second line B of the power supply is positive and the polarity of the first line A is negative, the second switch module 20 includes a second relay KM2, and the second relay KM2 includes a second coil T2, a second armature L2, a fourth contact 4, a fifth contact 5 and a sixth contact 6. The input end of the second coil T2 is connected to the first line A of the power supply through the second unidirectional conductive element D2, and the output end is connected to the second line B of the power supply. The fourth contact 4 is connected to the positive terminal C of the load, the fifth contact 5 is connected to the second line B of the power supply, and the sixth contact 6 is connected to the first line A of the power supply. The second armature L2 is used to control the conduction between the fourth contact 4 and the fifth contact 5, or the conduction between the fourth contact 4 and the sixth contact 6. Among them, the fifth contact 5 is a normally closed contact. When the second coil T2 is de-energized, the fifth contact 5 is conductive with the fourth contact 4. An anode of the second unidirectional conductive element D2 is connected to the first line A of the power source, and a cathode thereof is connected to the input end of the second coil T2.

[0042] In order to limit the current in the first switch module 10, the first switch module 10 also includes: a first resistor R1, which is arranged between the second line B of the power supply and the input end of the first coil T1; similarly, in order to limit the current in the second switch module 20, the second switch module 20 also includes a second resistor R2, which is arranged between the output end of the second coil T2 and the second line B of the power supply.

[0043] When the polarity of the first line A of the power supply is positive and the polarity of the second line B is negative, the current output by the first line A of the power supply passes through the second unidirectional conductive element D2, the second coil T2, the second resistor R2, and finally flows through the second line B of the power supply to form a loop. At this time, there is current passing through the second coil T2. Since the current has a magnetic effect, the second coil T2 will attract the second armature L2 to make the sixth contact 6 and the fourth contact 4 conductive. Then the positive pole of the power supply is connected to the positive terminal C of the load through the sixth contact 6 and the fourth contact 4. At this time, the first unidirectional conductive element D1 cannot be forward-conducted, so no current passes through the first coil T1. The contacts of the first relay KM1 are at different points, and the second contact 2 is conductive with the first contact 1. The negative pole of the power supply is connected to the negative terminal D of the polarity load through the second contact 2 and the first contact 1, and the polarity load works normally.

[0044] When the polarity of the first line A of the power supply is negative and the polarity of the second line B is positive, the current output by the second line B of the power supply passes through the first resistor R1, the first coil T1, and the first unidirectional conductive element D1, and finally flows through the first line A of the power supply to form a loop. At this time, there is current passing through the first coil T1. Since the current has a magnetic effect, the first coil T1 will attract the first armature L1 to make the third contact 3 and the first contact 1 conductive, and then the positive pole of the power supply is connected to the negative terminal D of the load through the third contact 3 and the first contact 1. At this time, the second unidirectional conductive element D2 cannot be forwardly conductive, so no current passes through the second coil T2. The contacts of the second relay KM2 are at different points, and the fifth contact 5 is conductive with the fourth contact 4. The negative pole of the power supply is connected to the positive terminal C of the polarity load through the fifth contact 5 and the fourth contact 4, and the polarity load works normally.

[0045] Since a reverse electromotive force is generated when the relay switches from the on-off state to the off state, in order to absorb the generated reverse electromotive force, the first switch module 10 also includes: a third unidirectional conductive element D3, whose cathode is connected between the first resistor R1 and the input end of the first coil T1, and whose anode is connected between the output end of the first coil T1 and the first unidirectional conductive element D1, for absorbing the reverse electromotive force generated by the first relay KM1 to achieve the purpose of freewheeling; the second switch module 20 also includes: a fourth unidirectional conductive element D4, whose anode is connected between the output end of the second coil T2 and the second resistor R2, and whose cathode is connected between the second unidirectional conductive element D2 and the input end of the second coil T2, for absorbing the reverse electromotive force generated by the second relay KM2 to achieve the purpose of freewheeling.

[0046] In the above embodiment, the first unidirectional conducting element D1 , the first unidirectional conducting element D2 , the third unidirectional conducting element D3 and the fourth unidirectional conducting element D4 can all be diodes to achieve unidirectional conduction.

[0047] Example 3

[0048] This patent proposes a reverse connection self-correction circuit, as mentioned above Figure 1 As shown in the figure, the power supply voltage is input by the first line A and the second line B to supply power to the above-mentioned reverse connection self-correction circuit and the load. The reverse connection self-correction circuit includes a first switch module 10, a second switch module 20 and a polarity load (i.e., the load in the above-mentioned embodiment). The current output by the power supply passes through the first switch module 10 and the second switch module 20 and is output to supply power to the polarity load.

[0049] The specific circuit structure of this embodiment is as mentioned above. Figure 2 The specific working principle is as follows:

[0050] The first relay KM1 and the second relay KM2 both have a single set of contacts. When not powered, the second contact 2 is connected to the first contact 1, and the fifth contact 5 is connected to the fourth contact 4. That is, the second contact 2 and the first contact 1 remain in a normally closed state when not powered, and the third contact 3 and the first contact 1 remain in a normally open state when not powered; the fifth contact 5 and the fourth contact 4 remain in a normally closed state when not powered, and the sixth contact 6 and the fourth contact 4 remain in a normally open state when not powered. The polarity load is connected to the first output terminal d2 of the second switch module 20 at one end as the positive pole, and connected to the first output terminal d1 of the first switch module 10 at one end as the negative pole, that is, the positive terminal C of the polarity load should be connected to the positive pole of the power supply, and the negative terminal D should be connected to the power supply ground.

[0051] When the power supply is not powered, that is, there is no voltage between the first line A and the second line B. At this time, the power supply reverse connection self-correction circuit does not work, and there is no voltage across the polarity load.

[0052] At the moment of power-on, there are two situations: the first line A is connected to the positive pole of the power supply, the second line B is connected to the negative pole of the power supply (i.e., grounded), or the first line A is connected to the negative pole of the power supply (i.e., grounded), and the second line B is connected to the positive pole of the power supply. Since the relay relies on the mechanical structure to complete the switching of the contacts, the relay will have an action time, that is, the first relay KM1 and the second relay KM2 do not act at the moment of power-on. That is, the second contact 2 is connected to the first contact 1, and the fifth contact 5 is connected to the fourth contact 4. The positive terminal C and the negative terminal D of the polarity load are both connected to the second line B of the power supply, and the third contact 3 of the first relay KM1 and the sixth contact 6 of the second relay KM2 are in a floating state. At the moment of power-on, there is no risk in the entire circuit, and there will be no damage to the power supply or polarity load due to the relay not being able to switch in time.

[0053] After a period of power-on, when the polarity of the first line A of the power supply is positive (connected to the positive pole of the power supply) and the polarity of the second line B is negative (connected to the power supply ground), the current output by the first line A of the power supply passes through the second unidirectional conductive element D2, the second coil T2, the second resistor R2, and finally flows through the second line B of the power supply to form a loop. At this time, there is current passing through the second coil T2. Since the current has a magnetic effect, the second coil T2 will attract the second armature L2 to make the sixth contact 6 and the fourth contact 4 conductive. Then the positive pole of the power supply is connected to the positive terminal C of the load through the sixth contact 6 and the fourth contact 4. At this time, the first unidirectional conductive element D1 cannot be forward-conducted, so no current passes through the first coil T1. The contacts of the first relay KM1 are at different points, and the second contact 2 is conductive with the first contact 1. The negative pole of the power supply is connected to the negative terminal D of the polarity load through the second contact 2 and the first contact 1, and the polarity load works normally.

[0054] When the polarity of the first line A of the power supply is negative and the polarity of the second line B is positive, the current output by the second line B of the power supply passes through the first resistor R1, the first coil T1, and the first unidirectional conductive element D1, and finally flows through the first line A of the power supply to form a loop. At this time, there is current passing through the first coil T1. Since the current has a magnetic effect, the first coil T1 will attract the first armature L1 to make the third contact 3 and the first contact 1 conductive, and then the positive pole of the power supply is connected to the negative terminal D of the load through the third contact 3 and the first contact 1. At this time, the second unidirectional conductive element D2 cannot be forwardly conductive, so no current passes through the second coil T2. The contacts of the second relay KM2 are at different points, and the fifth contact 5 is conductive with the fourth contact 4. The negative pole of the power supply is connected to the positive terminal C of the polarity load through the fifth contact 5 and the fourth contact 4, and the polarity load works normally.

[0055] Figure 3 : is a conduction timing diagram of a relay and a load according to an embodiment of the present invention, such as Figure 3 As shown, when the first line A of the power supply is connected to the positive pole of the power supply and the second line B is connected to the negative pole of the power supply, the second relay KM2 is energized and the first relay KM1 is energized. The voltage at the C end of the polarity load is connected to the positive pole of the power supply, and the D end of the polarity load is connected to the power ground, and the voltage is zero. When the first line A of the power supply is connected to the negative pole of the power supply and the second line B is connected to the positive pole of the power supply, the first relay KM1 is energized and the second relay KM2 is de-energized. The voltage at the C end of the polarity load is connected to the positive pole of the power supply, and the D end of the polarity load is connected to the power ground, and the voltage is zero.

[0056] After the on / off state of the first relay KM1 or the second relay KM2 is switched, the value of the output voltage is consistent with the voltage provided by the power supply, that is, there is no voltage loss during the switching process. And no matter how the polarity of the power supply A and the second line B changes, the polarity of the C and D ends of the load is always constant, so the circuit can automatically correct the polarity of the power input to ensure the consistency of the output power polarity.

[0057] In this embodiment, the unidirectional conducting elements D3 and D4 play a role of freewheeling, and are respectively used to absorb the reverse electromotive force generated at both ends of the coil when the first relay KM1 and the first relay KM2 are switched to power-off. The first resistor R1 and the second resistor R2 mainly play a role of current limiting, limiting the current in the circuit.

[0058] The reverse connection self-correction circuit of this embodiment can automatically correct the reverse connection of the power line, ensure that the output voltage matches the polarity load, and protect the polarity load to work safely and stably. After the connection mode of the first power line and the second power line is corrected by the circuit, the output voltage of the power supply remains unchanged, that is, the voltage does not decay. In addition, the circuit design of this embodiment is simple, reliable, and stable.

[0059] Example 4

[0060] This embodiment provides an electric device, including a load, and the electric device also includes the above-mentioned reverse connection self-correction circuit, which is used to realize automatic correction after the power line is reversed. In this embodiment, the electric device is a wireless communication device.

[0061] The circuit embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0062] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reverse connection self-correcting circuit, characterized in that: The circuit comprises: A first switch module, wherein the first input terminal and the third input terminal are connected to the second line of the power supply, the second input terminal and the second output terminal are connected to the first line of the power supply, and the first output terminal is connected to the negative terminal of the load, and the first switch module is used to control the first input terminal or the second input terminal thereof to selectively conduct with the first output terminal according to the polarities of the first line and the second line; the first switch module is specifically used to: when the polarity of the first line is positive and the polarity of the second line is negative, power off, thereby controlling the first input terminal thereof to conduct with the first output terminal; when the polarity of the second line is positive and the polarity of the first line is negative, power on, thereby controlling the second input terminal thereof to conduct with the first output terminal; A second switch module, wherein the first input terminal and the second output terminal are connected to the second line of the power supply, the second input terminal and the third input terminal are connected to the first line of the power supply, and the first output terminal is connected to the positive terminal of the load. The second switch module is used to control its own first input terminal or second input terminal to selectively conduct with the first output terminal according to the polarity of the first line and the second line; the second switch module is specifically used to: when the polarity of the first line is positive and the polarity of the second line is negative, power on, thereby controlling its own second input terminal to conduct with the first output terminal; when the polarity of the second line is positive and the polarity of the first line is negative, power off, thereby controlling its own first input terminal to conduct with the first output terminal.

2. The circuit according to claim 1, characterized in that The first switch module includes a first relay, the first relay includes a first coil, a first armature, a first contact, a second contact and a third contact, the input end of the first coil is connected to the second line of the power supply, the output end is connected to the first line of the power supply through a first unidirectional conductive element, the first contact is connected to the negative terminal D of the load, the second contact is connected to the second line of the power supply, the third contact is connected to the first line of the power supply, and the first armature is used to control the conduction between the first contact and the second contact, or the conduction between the first contact and the third contact; The second switch module includes a second relay, which includes a second coil, a second armature, a fourth contact, a fifth contact and a sixth contact. The input end of the second coil is connected to the first line of the power supply through a second unidirectional conductive element, and the output end is connected to the second line of the power supply. The fourth contact is connected to the positive terminal of the load, the fifth contact is connected to the second line of the power supply, and the sixth contact is connected to the first line of the power supply. The second armature is used to control conduction between the fourth contact and the fifth contact, or conduction between the fourth contact and the sixth contact.

3. The circuit according to claim 2, characterized in that The second contact is a normally closed contact in the first relay, and the fifth contact is a normally closed contact in the second relay.

4. The circuit according to claim 2, characterized in that The anode of the first unidirectional conductive element is connected to the output end of the first coil, and the cathode of the first unidirectional conductive element is connected to the first line of the power supply; the anode of the second unidirectional conductive element is connected to the first line of the power supply, and the cathode is connected to the input end of the second coil.

5. The circuit according to claim 4, characterized in that The first switch module further includes: a first resistor, arranged between the second line of the power supply and the input end of the first coil; The second switch module further includes: a second resistor, which is arranged between the output end of the second coil and the second line of the power supply.

6. The circuit according to claim 5, characterized in that The first switch module further includes: a third unidirectional conductive element, a cathode of which is connected between the first resistor and the input end of the first coil, and an anode of which is connected between the output end of the first coil and the first unidirectional conductive element; The second switch module further includes: a fourth unidirectional conductive element, an anode of which is connected between the output end of the second coil and the second resistor, and a cathode of which is connected between the second unidirectional conductive element and the input end of the second coil.

7. The circuit according to claim 6, characterized in that The first unidirectional conducting element, the second unidirectional conducting element, the third unidirectional conducting element, and the fourth unidirectional conducting element are diodes.

8. An electrical device, including a load, characterized in that: The electrical equipment further comprises the reverse connection self-correcting circuit according to any one of claims 1 to 7.

9. The electrical equipment according to claim 8, characterized in that: The power-consuming device is a wireless communication device.

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