CN214255718U - Reverse connection preventing circuit, system and electronic equipment - Google Patents
Reverse connection preventing circuit, system and electronic equipment Download PDFInfo
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- CN214255718U CN214255718U CN202120380819.0U CN202120380819U CN214255718U CN 214255718 U CN214255718 U CN 214255718U CN 202120380819 U CN202120380819 U CN 202120380819U CN 214255718 U CN214255718 U CN 214255718U
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Abstract
The invention provides an anti-reverse connection circuit, a system and electronic equipment, wherein the anti-reverse connection circuit comprises a first diode group, a second diode group and a load, the first diode group and the second diode group are respectively connected with the load, and the first diode group and the second diode group are both used for being electrically connected with an input power supply; when the input power supply is connected positively, the first diode group, the second diode group and the load are conducted through the first loop, so that the input power supply supplies power to the load through the first loop; when the input power supply is reversely connected, the first diode group, the second diode group and the load are conducted through the second loop, so that the input power supply supplies power to the load through the second loop. The reverse connection preventing circuit, the system and the electronic equipment provided by the invention have the advantages that even if the reverse connection condition occurs, the power can be normally supplied to the load, and the reverse connection preventing effect is better.
Description
Technical Field
The invention relates to the technical field of reverse connection prevention, in particular to a reverse connection prevention circuit, a reverse connection prevention system and electronic equipment.
Background
In application circuits of various home appliances, devices and the like, coordination work between two Printed Circuit Boards (PCB) often occurs, wherein a working power supply on one Board needs to be taken from the other Board, the power supply is usually direct current, the direct current has a positive pole and a negative pole, the transmission often faces the possibility of the positive pole and the negative pole being connected in reverse, and the situation often damages the power supply or the load on the Board.
The existing mode of solving the problem of reverse connection mostly adopts wiring terminals to prevent fool, the connection wire is matched with the terminal to prevent fool, and the positive pole and the negative pole are provided with the connection wires with different colors, so that the mode can reduce the probability of reverse connection to a certain extent, but can not completely stop, and the cost and the material types can be increased. In another mode, an anti-reverse connection protection circuit is designed on a supplied power board, but basically, the power source or the load can only be guaranteed not to be burnt, and the rework difficulty is high for a product with complex installation.
In summary, the problem of poor effect of the reverse connection preventing circuit exists in the prior art.
Disclosure of Invention
The invention aims to provide an anti-reverse connection circuit, an anti-reverse connection system and electronic equipment, and aims to solve the problem that the effect of the anti-reverse connection circuit in the prior art is poor.
In order to solve the above problem, in a first aspect, an embodiment of the present application provides an anti-reverse-connection circuit, where the anti-reverse-connection circuit includes a first diode group, a second diode group, and a load, the first diode group and the second diode group are respectively connected to the load, and both the first diode group and the second diode group are used for being electrically connected to an input power supply; when the input power supply is connected positively, the first diode group, the second diode group and the load are conducted through a first loop, so that the input power supply supplies power to the load through the first loop; when the input power supply is reversely connected, the first diode group, the second diode group and the load are conducted through a second loop, so that the input power supply supplies power to the load through the second loop.
In the reverse connection preventing circuit provided by the application, when the input power supply is connected positively, the input power supply can supply power for the load through the first loop, and when the input power supply is connected reversely, the input power supply can supply power for the load through the second loop, so that no matter the input power supply is connected positively or reversely, the corresponding loops can supply power for the load, and the purpose of reverse connection prevention is achieved. Moreover, through the reverse connection preventing circuit, even if reverse connection is carried out during installation, rework is not needed, and the effect is better.
Optionally, the reverse connection prevention circuit further includes a filter capacitor, and the filter capacitor is connected in parallel with the load.
Optionally, the filter capacitor comprises a ceramic chip capacitor.
Optionally, the first diode group comprises a first diode and a second diode, an anode of the first diode is connected with a cathode of the second diode, a cathode of the first diode is connected with the first end of the load, an anode of the second diode is connected with the second end of the load, and an anode of the input power supply is connected between the anode of the first diode and the cathode of the second diode;
the second diode group comprises a third diode and a fourth diode, wherein the anode of the third diode is connected with the cathode of the fourth diode, the cathode of the third diode is connected with the first end of the load, the anode of the fourth diode is connected with the second end of the load, and the cathode of the input power supply is connected between the anode of the third diode and the cathode of the fourth diode.
Optionally, the reverse connection preventing circuit further includes a positive power line and a negative power line, the positive power line is electrically connected to the first end of the load, the cathodes of the first diode and the third diode, respectively, and the negative power line is electrically connected to the second end of the load, the anodes of the second diode and the fourth diode, respectively.
Optionally, the reverse connection prevention circuit further comprises an electrolytic capacitor, and the electrolytic capacitor is connected with the load in parallel.
In a second aspect, the present application further provides an anti-reverse connection system, which includes a first PCB and the above anti-reverse connection circuit, wherein the anti-reverse connection circuit is integrated on the first PCB.
Optionally, the reverse connection prevention system further comprises an input power supply, and the input power supply is connected with the reverse connection prevention circuit.
Optionally, the reverse connection prevention system further includes a second circuit board, and the input power supply is integrated on the second circuit board.
In a third aspect, the present application further provides an electronic device, which includes the above anti-reverse connection circuit.
Drawings
Fig. 1 is a schematic diagram of a module when two PCB boards are connected in the prior art.
Fig. 2 is a schematic diagram of a module in a prior art when two PCBs are connected in reverse.
Fig. 3 is a circuit schematic diagram of an anti-reverse connection circuit provided in an embodiment of the present application.
Description of the labeling:
100-a reverse-connection prevention circuit; 110-a first diode group; 120-a second diode group; 130-load; d1 — first diode; d2 — second diode; d3 — third diode; d4 — fourth diode; c1-filter capacitance; e1-electrolytic capacitor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As described in the background art, the direct current has a positive and a negative component, and when the connection is performed, the reverse connection may occur when the circuit connection is performed, and thus the circuit failure occurs.
For example, referring to fig. 1, fig. 1 shows a connection between two PCB boards, wherein the PCB board 1 is used as a power supply board, the PCB board 2 is used as a load board, and the PCB board 1 supplies power to the PCB board 2 in a normal operating state. It is understood that the PCB board 1 provides dc power to the PCB board 2, and thus has a positive and negative division.
As shown in the figure, PCB board 1 is provided with the power just with power negative port, also is provided with the power just with power negative port on PCB board 2, and when normally connecting, the positive port of power of PCB board 1 is connected with PCB board 2's the positive port of power, and PCB board 1's the negative port of power is connected with PCB board 2's the negative port of power. However, in practical applications, referring to fig. 2, a situation of reverse connection may occur when connecting, that is, the positive power port of the PCB 1 and the negative power port of the PCB 2 are connected, and thus the power on the PCB 1 may be damaged or the load on the PCB 2 may be damaged.
The existing mode of solving the problem of reverse connection mostly adopts wiring terminals to prevent fool, the connection wire is matched with the terminal to prevent fool, and the positive pole and the negative pole are provided with the connection wires with different colors, so that the mode can reduce the probability of reverse connection to a certain extent, but can not completely stop, and the cost and the material types can be increased. In another mode, an anti-reverse connection protection circuit is designed on a supplied power board, but basically, the power source or the load can only be guaranteed not to be burnt, and the rework difficulty is high for a product with complex installation. For example, the reverse connection preventing circuit 100 is often used with a diode, however, the diode is only used to achieve non-conduction when reverse connection is performed, and will not cause damage to the power supply or the load, and the whole circuit needs to be reworked and reconnected. Because the direct connection of two PCB boards generally adopts the welding mode, therefore the rework degree of difficulty is great, prevents that the effect of reverse connection circuit is not good.
In view of this, the present application provides an anti-reverse connection circuit, which can normally conduct a load regardless of a forward connection or a reverse connection, and has a better effect of reverse connection without rework even if the reverse connection is performed.
The following is an exemplary description of the anti-reverse connection circuit provided in the present application:
referring to fig. 3, as an implementation manner, the reverse connection preventing circuit 100 includes a first diode group 110, a second diode group 120 and a load 130, wherein the first diode group 110 and the second diode group 120 are respectively connected to the load 130, and the first diode group 110 and the second diode group 120 are both used for being electrically connected to an input power source. When the input power is connected positively, the first diode group 110, the second diode group 120 and the load 130 are conducted through the first loop, so that the input power supplies power to the load 130 through the first loop; when the input power is reversely connected, the first diode set 110, the second diode set 120 and the load 130 are conducted through the second loop, so that the input power supplies power to the load 130 through the second loop.
With the reverse connection prevention circuit 100 provided by the present application, under the condition of a positive connection, an input power supply can supply power to the load 130 through the first loop; in the reverse connection condition, the input power can supply power to the load 130 through the second loop, so that the effect of normally supplying power to the load 130 can be achieved no matter whether the connection mode is a positive connection mode or a reverse connection mode. And when the reverse connection condition occurs, rework is not needed, so that the reverse connection prevention effect is better.
As an implementation manner, the first diode group 110 includes a first diode D1 and a second diode D2, an anode of the first diode D1 is connected to a cathode of the second diode D2, a cathode of the first diode D1 is connected to a first end of the load 130, an anode of the second diode D2 is connected to a second end of the load 130, and an anode of the input power is connected between an anode of the first diode D1 and a cathode of the second diode D2.
The second diode group 120 includes a third diode D3 and a fourth diode D4, an anode of the third diode D3 is connected to a cathode of the fourth diode D4, a cathode of the third diode D3 is connected to a first terminal of the load 130, an anode of the fourth diode D4 is connected to a second terminal of the load 130, and a cathode of the input power is connected between an anode of the third diode D3 and a cathode of the fourth diode D4.
On the basis, the first loop may be composed of the first diode D1 and the fourth diode D4, and the second loop may be composed of the second diode D2 and the third diode D3.
In one implementation, the reverse connection preventing circuit 100 further includes a positive power line and a negative power line, the positive power line is electrically connected to the first end of the load 130, the cathodes of the first diode D1 and the third diode D3, respectively, and the negative power line is electrically connected to the second end of the load 130, the anodes of the second diode D2 and the fourth diode D4, respectively.
On the basis, when the input power is connected in the positive direction, the first diode D1 and the fourth diode D4 form a first loop, wherein the current of the input power flows through the first diode D1, the load 130 and the fourth diode D4 in sequence and finally returns to the negative pole of the input power, and at the moment, the second diode D2 and the third diode D3 are reversely cut off. When the input power is reversely connected, the second diode D2 and the third diode D3 form a second loop, wherein the current of the input power flows through the second diode D2, the load 130 and the third diode D3 in sequence and finally returns to the negative electrode of the input power, and at this time, the first diode D1 and the fourth diode D4 are reversely cut off.
It can be seen that whether the diodes are connected in the forward direction or in the reverse direction, two diodes always work in the forward conducting state, and the other two diodes work in the reverse blocking state, so as to normally supply power to the load 130.
It should be noted that the load 130 described herein may be an electric device, an electric appliance, or a related circuit, or an energy storage device, and the like, which is not limited in this application. Meanwhile, it should be noted that the positions of the positive power line and the negative power line may also be interchanged, that is, the negative power line is electrically connected to the first end of the load 130, the cathode of the first diode D1, and the cathode of the third diode D3, and the positive power line is electrically connected to the second end of the load 130, the anode of the second diode D2, and the anode of the fourth diode D4, which is not limited herein.
In addition, in order to implement the filtering function, the anti-reverse connection circuit 100 further includes a filter capacitor C1, and the filter capacitor C1 is connected in parallel with the load 130, as an implementation manner, the filter capacitor C1 may be a ceramic chip capacitor and is used for filtering high-frequency noise. Meanwhile, in order to filter low-frequency noise at the same time, the reverse connection preventing circuit 100 provided by the application further comprises an electrolytic capacitor E1, the electrolytic capacitor E1 is connected with the load 130 in parallel, and the electrolytic capacitor E1 can play a role in storing energy and filtering low-frequency interference.
In summary, the reverse connection prevention circuit 100 provided by the present application can realize that the input power supplies power to the load 130 normally no matter in the case of forward connection or reverse connection, so that even if the reverse connection occurs, the normal operation of the circuit is not affected, rework is not needed, and the reverse connection prevention effect is better.
Based on the above implementation manner, the present application further provides an anti-reverse connection system, which includes a first PCB and the above anti-reverse connection circuit 100, where the anti-reverse connection circuit 100 is integrated on the first PCB. Of course, in a possible implementation manner, the load 130 may also be provided independently, and is not limited herein.
In addition, the reverse connection prevention system further includes an input power source connected to the reverse connection prevention circuit 100, the input power source being capable of supplying a direct current to the load 130.
In a possible implementation manner, the reverse connection prevention system further comprises a second circuit board, and the input power supply is integrated on the second circuit board.
The first circuit board and the second circuit board are installed at different positions according to different functions and actions, and the first circuit board and the second circuit board are connected and matched through a power line, a signal line and the like to complete control over electric products or equipment. Because of the limitation of cost, safety regulations, installation structures and other conditions, the two circuit boards cannot simultaneously introduce alternating current for voltage reduction under many conditions, and the required control power supply is generated through rectification. Therefore, the second circuit board generally introduces ac high voltage power to be stepped down by a switching power supply or a linear transformer, rectifies the ac high voltage power to generate a required dc control power for the second circuit board to use, and simultaneously supplies the generated dc control power to the first circuit board. By arranging the reverse connection preventing circuit 100, the second circuit board can be ensured to normally supply power to the first circuit board.
Optionally, the present application further provides an electronic device, which includes the reverse connection prevention circuit 100 described above. The electronic device may be an air conditioner or other devices, which is not limited in this application.
In summary, the present application provides an anti-reverse connection circuit 100, a system and an electronic device, the anti-reverse connection circuit 100 includes a first diode set 110, a second diode set 120 and a load 130, the first diode set 110 and the second diode set 120 are respectively connected to the load 130, and the first diode set 110 and the second diode set 120 are both used for electrically connecting to an input power supply; when the input power is connected positively, the first diode group 110, the second diode group 120 and the load 130 are conducted through the first loop, so that the input power supplies power to the load 130 through the first loop; when the input power is reversely connected, the first diode set 110, the second diode set 120 and the load 130 are conducted through the second loop, so that the input power supplies power to the load 130 through the second loop. In the reverse connection prevention circuit 100 provided by the application, when the input power supply is connected in the positive direction, the input power supply can supply power to the load 130 through the first loop, and when the input power supply is connected in the reverse direction, the input power supply can supply power to the load 130 through the second loop, so that no matter the input power supply is connected in the positive direction or the reverse direction, the corresponding loop can supply power to the load 130, and the purpose of reverse connection prevention is achieved. Moreover, through the reverse connection preventing circuit 100, even if reverse connection is carried out during installation, rework is not needed, and the effect is better.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An anti-reverse connection circuit is characterized in that the anti-reverse connection circuit (100) comprises a first diode group (110), a second diode group (120) and a load (130), wherein the first diode group (110) and the second diode group (120) are respectively connected with the load (130), and the first diode group (110) and the second diode group (120) are both used for being electrically connected with an input power supply; wherein,
when the input power supply is connected positively, the first diode group (110), the second diode group (120) and the load (130) are conducted through a first loop, so that the input power supply supplies power to the load (130) through the first loop;
when the input power source is reversely connected, the first diode group (110), the second diode group (120) and the load (130) are conducted through a second loop, so that the input power source supplies power to the load (130) through the second loop.
2. The anti-reverse connection circuit (100) according to claim 1, wherein the anti-reverse connection circuit (100) further comprises a filter capacitor (C1), the filter capacitor (C1) being connected in parallel with the load (130).
3. The anti-reverse connection circuit (100) according to claim 2, wherein the filter capacitor (C1) comprises a ceramic tile capacitor.
4. The reverse-connection prevention circuit (100) of claim 1, wherein the first diode group (110) comprises a first diode (D1) and a second diode (D2), an anode of the first diode (D1) is connected with a cathode of the second diode (D2), a cathode of the first diode (D1) is connected with a first end of the load (130), an anode of the second diode (D2) is connected with a second end of the load (130), and an anode of the input power source is connected between an anode of the first diode (D1) and a cathode of the second diode (D2);
the second diode group (120) includes a third diode (D3) and a fourth diode (D4), an anode of the third diode (D3) is connected to a cathode of the fourth diode (D4), a cathode of the third diode (D3) is connected to a first end of the load (130), an anode of the fourth diode (D4) is connected to a second end of the load (130), and a cathode of the input power source is connected between an anode of the third diode (D3) and a cathode of the fourth diode (D4).
5. The anti-reverse connection circuit (100) according to claim 4, wherein the anti-reverse connection circuit (100) further comprises a positive power line and a negative power line, the positive power line being electrically connected with the first terminal of the load (130), the first diode (D1) and the cathode of the third diode (D3), respectively, and the negative power line being electrically connected with the second terminal of the load (130), the anode of the second diode (D2) and the fourth diode (D4), respectively.
6. Anti-reverse connection circuit (100) according to claim 1, characterized in that said anti-reverse connection circuit (100) further comprises an electrolytic capacitor (E1), said electrolytic capacitor (E1) being connected in parallel with said load (130).
7. An anti-reverse connection system, characterized in that the anti-reverse connection system comprises a first PCB and an anti-reverse connection circuit (100) according to any one of claims 1 to 6, the anti-reverse connection circuit (100) being integrated with the first PCB.
8. The reverse-connection prevention system according to claim 7, further comprising an input power supply connected with the reverse-connection prevention circuit (100).
9. The reverse connection prevention system of claim 8 further comprising a second circuit board, the input power source being integrated with the second circuit board.
10. An electronic device, characterized in that it comprises a reverse-connection prevention circuit (100) according to claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120380819.0U CN214255718U (en) | 2021-02-19 | 2021-02-19 | Reverse connection preventing circuit, system and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120380819.0U CN214255718U (en) | 2021-02-19 | 2021-02-19 | Reverse connection preventing circuit, system and electronic equipment |
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| Publication Number | Publication Date |
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| CN214255718U true CN214255718U (en) | 2021-09-21 |
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| CN202120380819.0U Active CN214255718U (en) | 2021-02-19 | 2021-02-19 | Reverse connection preventing circuit, system and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002612A (en) * | 2021-10-26 | 2022-02-01 | 珠海格力电器股份有限公司 | Reverse connection detection circuit and method and power supply system |
| WO2024140842A1 (en) * | 2022-12-29 | 2024-07-04 | 长春捷翼汽车科技股份有限公司 | Relay state detection circuit, and vehicle |
-
2021
- 2021-02-19 CN CN202120380819.0U patent/CN214255718U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002612A (en) * | 2021-10-26 | 2022-02-01 | 珠海格力电器股份有限公司 | Reverse connection detection circuit and method and power supply system |
| WO2024140842A1 (en) * | 2022-12-29 | 2024-07-04 | 长春捷翼汽车科技股份有限公司 | Relay state detection circuit, and vehicle |
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