A kind of anti-reverse connection device and anti-reverse connection system

Abstract

The present invention provides a reverse connection prevention device and a reverse connection prevention system, wherein the reverse connection prevention device includes a device circuit, a reverse connection prevention unit and a protection unit; the device circuit includes a positive input terminal, a negative input terminal and a common ground output terminal; the reverse connection prevention unit is arranged at the positive input terminal, and the reverse connection prevention unit is used to conduct when the power supply is positively connected and the current flows to the positive input terminal of the device circuit, and to shut down when the power supply is reversely connected; the protection unit is arranged at the common ground output terminal, and the protection unit is used to disconnect when the current flowing through the common ground output terminal is greater than a set value to prevent the device circuit from being damaged. The reverse connection prevention device and the reverse connection prevention system provided by the present invention can realize single-machine reverse connection prevention through the reverse connection prevention unit and the protection unit when a single device is used. When multiple devices are used, if any device is reversely connected, the current can be conducted to the ground through the common ground output terminal. At this time, the power supply is short-circuited, the current is too large, and the protection unit will be disconnected, so that a loop cannot be formed, thereby playing a protective role.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuits, and in particular to an anti-reverse connection device and an anti-reverse connection system. Background Art

[0002] During the use of existing circuits and equipment, it is easy to have a reverse connection of the power supply, that is, the positive input terminal of the circuit is connected to the negative pole of the power supply by mistake, and the negative input terminal of the power supply is connected to the positive pole of the power supply by mistake. In the case of reverse connection of the power supply, once a loop is formed in the circuit, it may cause irreversible damage to various devices in the circuit. Most of the existing anti-reverse connection technologies are to connect an anti-reverse connection diode in series on the power supply circuit, which can play an anti-reverse connection role for single-machine equipment. However, when two or more devices connected to the same ground are used, if the two power supplies are connected one positive and one reverse, the above solution cannot play a protective role. In addition, if the anti-reverse connection diode is connected in series on the negative pole of the power supply, there is a voltage difference between the signal ground of the equipment and the negative pole of the power supply, and it cannot be used on devices connected to the same ground. Summary of the invention

[0003] In view of this, an object of the embodiments of the present invention is to provide an anti-reverse connection device and an anti-reverse connection system to improve the problem that the existing anti-reverse connection device cannot meet the anti-reverse connection requirements.

[0004] The technical solution adopted by the present invention is as follows:

[0005] In the first aspect, the present invention provides an anti-reverse polarity device, which is applied to a circuit in which multiple devices are connected to a common ground, and the anti-reverse polarity device includes a device circuit, an anti-reverse polarity unit and a protection unit; the device circuit includes a positive input terminal, a negative input terminal and a common ground output terminal; the anti-reverse polarity unit is arranged at the positive input terminal, and the anti-reverse polarity unit is used to be turned on when current flows to the positive input terminal of the device circuit, and the anti-reverse polarity unit is also used to be turned off when current flows out of the positive input terminal of the device circuit; the protection unit is arranged at the common ground output terminal, one end of the protection unit is electrically connected to the common ground output terminal, and the other end of the protection unit is grounded; the protection unit is used to be disconnected when the current flowing through the common ground output terminal is greater than a set value to prevent the device circuit from being damaged.

[0006] Furthermore, the anti-reverse connection unit includes a diode, and a cathode of the diode is electrically connected to the positive input terminal of the device circuit.

[0007] Furthermore, the protection unit includes a resettable fuse, and the resettable fuse is used to disconnect when the current flowing through the common ground output terminal is greater than a set value.

[0008] Furthermore, the restorable fuse is also used to restore the connection after the current flowing through the common ground output terminal decreases.

[0009] Furthermore, the negative input terminal and the common output terminal of the device circuit are connected. When the negative input terminal is wrongly connected to the positive pole of the power supply and the positive input terminal is wrongly connected to the negative pole of the power supply, the anti-reverse connection unit resistance current set at the positive input terminal flows in the reverse direction, and the current is grounded through the positive pole of the power supply, the negative input terminal and the common output terminal to prevent damage to the device circuit.

[0010] In a second aspect, the present invention further provides an anti-reverse connection system, the anti-reverse connection system comprising two anti-reverse connection devices as described above, including a first anti-reverse connection device and a second anti-reverse connection device;

[0011] The first anti-reverse connection device comprises a first common ground output terminal and a first protection unit, and the second anti-reverse connection device comprises a second common ground output terminal and a second protection unit;

[0012] The first end of the first protection unit is electrically connected to the first common ground output end; the first end of the second protection unit is electrically connected to the second common ground output end;

[0013] The second end of the first protection unit and the second end of the second protection unit are connected.

[0014] Further, the first anti-reverse connection device includes a first negative input terminal, and the first negative input terminal is electrically connected to the first common ground output terminal;

[0015] The second anti-reverse connection device comprises a second negative input terminal, and the second negative input terminal is electrically connected to the second common ground output terminal;

[0016] The first negative input terminal and the second negative input terminal are used to be connected to the negative electrode of the power supply; the first positive input terminal and the second positive input terminal are used to be connected to the positive electrode of the power supply.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a reverse connection prevention device and a reverse connection prevention system, wherein the reverse connection prevention device comprises a device circuit, a reverse connection prevention unit and a protection unit; the device circuit comprises a positive input terminal, a negative input terminal and a common ground output terminal; the reverse connection prevention unit is arranged at the positive input terminal, the reverse connection prevention unit is used to conduct when the current flows to the positive input terminal of the device circuit, and the reverse connection prevention unit is also used to shut down when the current flows out of the positive input terminal of the device circuit; the protection unit is arranged at the common ground output terminal, one end of the protection unit is electrically connected to the common ground output terminal, and the other end of the protection unit is grounded; the protection unit is used to disconnect when the current flowing through the common ground output terminal is greater than a set value to prevent the device circuit from being damaged. The reverse connection prevention device and the reverse connection prevention system provided by the present invention can realize single-machine reverse connection prevention through the reverse connection prevention unit and the protection unit when a single device is used. When multiple devices are used, if any device is reversely connected, the current can be conducted to the ground through the common ground output terminal. At this time, the power supply is short-circuited, the current is too large, and the protection unit will be disconnected, so that a loop cannot be formed, thereby playing a protective role.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of an anti-reverse connection device provided by the present invention is shown.

[0022] Figure 2 A schematic diagram of an anti-reverse connection system provided by the present invention is shown.

[0023] Icon: 10-anti-reverse polarity system; 100-anti-reverse polarity device; 110-device circuit; 120-anti-reverse polarity unit; 130-protection unit; 200-first anti-reverse polarity device; 210-first device circuit; 220-first anti-reverse polarity unit; 230-first protection unit; 300-second anti-reverse polarity device; 310-second device circuit; 320-second anti-reverse polarity unit; 330-second protection unit. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0028] In the description of the present invention, it should also be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms such as "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. The terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0029] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] During the use of existing circuits or equipment, it is easy for the power supply to be reversed, that is, the positive input terminal of the circuit is connected to the negative pole of the power supply by mistake, and the negative input terminal of the circuit is connected to the positive pole of the power supply by mistake. In the case of reverse power supply, once the circuit forms a loop according to the wrongly connected power supply, the current flows in the reverse direction, which may cause irreversible damage to various devices in the circuit. Most of the existing anti-reverse connection technologies are to connect an anti-reverse connection diode in series on the power supply circuit, which can play an anti-reverse connection role for single-machine equipment. However, when two or more devices connected to the same ground are used, if the two power supplies are connected in one positive and one reverse, the above solution cannot play a protective role. In addition, if the anti-reverse connection diode is connected in series on the negative pole of the power supply, there is a voltage difference between the signal ground of the equipment and the negative pole of the power supply, and it cannot be used on devices connected to the same ground.

[0031] In order to improve the above problems, this embodiment provides an anti-reverse connection device. Figure 1 , Figure 1 A schematic diagram of an anti-reverse connection device provided in this embodiment.

[0032] The reverse connection prevention device 100 provided in this embodiment includes a device circuit 110, a reverse connection prevention unit 120 and a protection unit 130. The device circuit 110 is a working circuit of the reverse connection prevention device 100. For example, the device circuit 110 can be any possible circuit such as a radio frequency circuit, a power supply circuit, a signal conversion circuit, etc., which is not limited in this embodiment. The device circuit 110 includes a positive input terminal, a negative input terminal and a common ground output terminal; the positive input terminal is used to connect to the positive pole of the power supply, the negative input terminal is used to connect to the negative pole of the power supply, and the common ground output terminal is used for grounding.

[0033] During use, improper use may cause power reverse connection, such as the positive input terminal is connected to the negative power terminal by mistake, and the negative input terminal is connected to the positive power terminal by mistake. When the power is reversed, if the current in the device circuit 110 flows in reverse to form a loop, it may cause irreversible damage to various components in the device circuit 110. The anti-reverse connection device 100 provided in this embodiment is provided with an anti-reverse connection unit 120, which is used to prevent power reverse connection.

[0034] The anti-reverse polarity unit 120 is arranged at the positive input terminal of the device circuit 110. The anti-reverse polarity unit 120 is used to be turned on when the current flows to the positive input terminal of the device circuit 110 to maintain the normal operation of the circuit. The anti-reverse polarity unit 120 is also used to be turned off when the current flows out of the positive input terminal of the device circuit 110 to avoid forming a loop and prevent the reverse current from being formed in the device circuit 110 when the power supply is reversed to damage the components.

[0035] The anti-reverse polarity device 100 can be applied to a circuit in which multiple devices are connected to a common ground. Therefore, the anti-reverse polarity device 100 is provided with a common ground output terminal. In order to avoid affecting other devices when the power supply of the anti-reverse polarity device 100 is reversed, in this embodiment, a protection unit 130 is provided at the common ground output terminal. In a possible implementation manner, one end of the protection unit 130 is electrically connected to the common ground output terminal, and the other end of the protection unit 130 is grounded.

[0036] The anti-reverse connection device 100 provided in this embodiment is provided with an anti-reverse connection unit 120 and a protection unit 130. When the power supply of the anti-reverse connection device 100 is reversely connected, the current in the device circuit 110 can be prevented from flowing in reverse to form a loop, thereby avoiding damage to the internal components of the device circuit 110. At the same time, when the current flowing through the common ground output terminal is large, the protection unit 130 is disconnected to prevent damage to the device, and can also avoid the influence of the reverse connection of the power supply of the anti-reverse connection device 100 on other devices.

[0037] In a possible implementation, the anti-reverse connection unit 120 includes a diode, and the diode has unidirectional conductivity, that is, when a forward voltage is applied to the anode and cathode of the diode, the diode is turned on. When a reverse voltage is applied to the anode and cathode, the diode is turned off. In this embodiment, the cathode of the diode is electrically connected to the positive input terminal of the device circuit 110, that is, the diode limits the current to only flow to the positive input terminal of the device circuit 110 through the external power supply. When the power supply is reversed, due to the unidirectional conductivity of the diode, a loop cannot be formed, which can prevent the device circuit 110 from being damaged.

[0038] It should be noted that the anti-reverse connection unit 120 includes but is not limited to a diode, and may also be other switch tubes or any device with an anti-reverse connection function.

[0039] In a possible implementation, the protection unit 130 includes a resettable fuse, which is also called a self-resetting fuse. It is an overcurrent electronic protection element. The traditional fuse overcurrent protection can only protect once and needs to be replaced if it is burned out, while the self-resetting fuse has the dual functions of overcurrent and overheat protection and automatic recovery. When a short circuit or overload occurs in the line, the large current flowing through the self-resetting fuse generates heat to melt the polymer resin, and the volume increases rapidly to form a high resistance state, and the working current decreases rapidly, thereby limiting and protecting the circuit. When the fault is eliminated, the self-resetting fuse cools and crystallizes again, the volume shrinks, and the conductive particles re-form a conductive path. The self-resetting fuse returns to a low resistance state, thereby completing the protection of the circuit without manual replacement.

[0040] In this embodiment, the first end of the restoreable fuse is electrically connected to the common ground output terminal, and the second end of the restoreable fuse is grounded. When the current flowing through the common ground output terminal is greater than a set value, the restoreable fuse is disconnected to prevent damage to the circuit. When the fault is eliminated, the current on the common ground output terminal decreases, and the restoreable fuse is restored to connection.

[0041] In a possible implementation, the negative input terminal of the device circuit 110 is connected to the common ground output terminal. When the negative input terminal is connected to the positive pole of the power supply by mistake, and the positive input terminal is connected to the negative pole of the power supply by mistake, the anti-reverse connection unit 120 provided at the positive input terminal resists the current to flow in reverse, and the current is grounded through the positive pole of the power supply, the negative input terminal and the common ground output terminal to prevent damage to the device circuit 110. After the fault is eliminated and the reverse connection is cancelled, the protection unit 130 returns to the on state, and the device can still work normally.

[0042] The present invention further provides an anti-reverse connection system 10, which includes at least two anti-reverse connection devices provided in the above embodiments. Figure 2In a possible implementation, the anti-reverse polarity system 10 includes a first anti-reverse polarity device 200 and a second anti-reverse polarity device 300. It should be noted that the principles and structures of the first anti-reverse polarity device 200 and the second anti-reverse polarity device 300 are the same as those of the anti-reverse polarity device 100 provided in the above embodiment. Both include a device circuit 110, a protection unit 130 and an anti-reverse polarity unit 120. However, the device circuits 110 of different anti-reverse polarity devices 100 may be the same or different, and this embodiment does not limit this.

[0043] The first reverse connection protection device 200 includes a first device circuit 210 , a first reverse connection protection unit 220 and a first protection unit 230 . The first device circuit 210 includes a first positive input terminal, a first negative input terminal and a first common ground output terminal.

[0044] The first anti-reverse connection unit 220 is arranged at the first positive input terminal. The first anti-reverse connection unit 220 is used to be turned on when the power supply is positively connected and the current flows to the first positive input terminal of the first device circuit 210 to maintain the normal operation of the circuit. The first anti-reverse connection unit 220 is also used to be turned off when the power supply of the first anti-reverse connection device 200 is reversely connected to avoid forming a loop, so as to prevent the reverse current from being formed in the first device circuit 210 when the power supply is reversely connected to damage components.

[0045] The first common ground output terminal is provided with a first protection unit 230. In a possible implementation, one end of the first protection unit 230 is electrically connected to the first common ground output terminal, and the other end of the first protection unit 230 is connected to the second protection unit 330 of the second device circuit 310. The first protection unit 230 is used to disconnect when the current flowing through the first common ground output terminal is greater than a set value, so as to prevent the first device circuit 210 from being damaged.

[0046] The second reverse connection prevention device 300 includes a second device circuit 310 , a second reverse connection prevention unit 320 and a second protection unit 330 . The second device circuit 310 includes a second positive input terminal, a second negative input terminal and a second common ground output terminal.

[0047] The second anti-reverse connection unit 320 is arranged at the second positive input terminal. The second anti-reverse connection unit 320 is used to be turned on when the power supply is positively connected and the current flows to the second positive input terminal of the second device circuit 310 to maintain the normal operation of the circuit. The second anti-reverse connection unit 320 is also used to be turned off when the power supply of the second anti-reverse connection device 300 is reversely connected to avoid forming a loop, so as to prevent the reverse current from being formed in the second device circuit 310 when the power supply is reversely connected to damage components.

[0048] The second common ground output terminal is provided with a second protection unit 330. In a possible implementation, one end of the second protection unit 330 is electrically connected to the second common ground output terminal, and the other end of the second protection unit 330 is connected to the first protection unit 230 of the first device circuit 210. The second protection unit 330 is used to disconnect when the current flowing through the second common ground output terminal is greater than a set value to prevent the second device circuit 310 from being damaged.

[0049] The first anti-reverse connection device 200 includes a first negative input terminal, which is electrically connected to the first common ground output terminal; the second anti-reverse connection device 300 includes a second negative input terminal, which is electrically connected to the second common ground output terminal. In a possible implementation, the second end of the first protection unit 230 and the second end of the second protection unit 330 are connected.

[0050] The reverse connection prevention system 10 provided in this embodiment can realize the reverse connection prevention of a single device or multiple devices. When a single device is used, when the first reverse connection prevention device 200 or the second reverse connection prevention device 300 is reversely connected, under the action of the reverse connection prevention unit 120, a loop cannot be formed, thereby playing a protective role. When multiple devices are used in a common ground, when the first reverse connection prevention device 200 and the second reverse connection prevention device 300 are correctly connected, the two common ground connected devices work normally. If the first reverse connection prevention device 200 and the second reverse connection prevention device 300 are both reversely connected, the two devices do not form a loop, the devices do not work, and are not damaged. If the first anti-reverse polarity device 200 is correctly connected and the second anti-reverse polarity device 300 is reversely connected, the current flow direction of the power supply is, the positive pole of the power supply-the negative pole of the second anti-reverse polarity device 300-the common ground connection line-the negative pole of the first anti-reverse polarity device 200-the negative pole of the power supply (the positive pole of the power supply is connected to the negative pole of the second anti-reverse polarity device 300, and the negative pole of the power supply is connected to the negative pole of the first anti-reverse polarity device 200). The power supply is short-circuited and a large current is generated. The protection unit 130 is disconnected under the action of the current to play a protective role. After the reverse polarity is canceled and the short circuit is removed, the protection unit 130 returns to the on state and the device can still work normally.

[0051] In summary, the present invention provides a reverse connection prevention device and a reverse connection prevention system, wherein the reverse connection prevention device includes a device circuit, a reverse connection prevention unit and a protection unit; the device circuit includes a positive input terminal, a negative input terminal and a common ground output terminal; the reverse connection prevention unit is arranged at the positive input terminal, and the reverse connection prevention unit is used to conduct when the current flows to the positive input terminal of the device circuit, and the reverse connection prevention unit is also used to shut down when the current flows out of the positive input terminal of the device circuit; the protection unit is arranged at the common ground output terminal, one end of the protection unit is electrically connected to the common ground output terminal, and the other end of the protection unit is grounded; the protection unit is used to disconnect when the current flowing through the common ground output terminal is greater than a set value to prevent the device circuit from being damaged. The reverse connection prevention device and the reverse connection prevention system provided by the present invention can realize single-machine reverse connection prevention through the reverse connection prevention unit and the protection unit when a single device is used. When multiple devices are used, if any device is reversely connected, the current can be conducted to the ground through the common ground output terminal. At this time, the power supply is short-circuited, the current is too large, and the protection unit will be disconnected, so that a loop cannot be formed, thereby playing a protective role.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reverse connection prevention system, characterized in that: The anti-reverse connection system includes at least two anti-reverse connection devices, the anti-reverse connection devices are applied to a circuit where multiple devices are connected to a common ground, and the anti-reverse connection devices include a device circuit, an anti-reverse connection unit, and a protection unit; The device circuit includes a positive input terminal, a negative input terminal and a common ground output terminal; The anti-reverse connection unit is arranged at the positive input terminal, and is used to be turned on when the current flows to the positive input terminal of the device circuit, and is also used to be turned off when the current flows out of the positive input terminal of the device circuit; The protection unit is arranged at the common ground output terminal, one end of the protection unit is connected to the common ground output terminal, and the other end of the protection unit is grounded; the protection unit is used to disconnect when the current flowing through the common ground output terminal is greater than a set value, so as to prevent the device circuit from being damaged; When the anti-reverse connection system includes a first anti-reverse connection device and a second anti-reverse connection device; the first anti-reverse connection device includes a first common ground output terminal, a first protection unit and a first anti-reverse connection unit; the first anti-reverse connection unit is arranged at a first positive input terminal of the first anti-reverse connection device; wherein the first common ground output terminal is a common ground output terminal of a device circuit corresponding to the first anti-reverse connection device; the first positive input terminal is a positive input terminal of a device circuit corresponding to the first anti-reverse connection device; the first protection unit is a protection unit corresponding to the first anti-reverse connection device; the first anti-reverse connection unit is an anti-reverse connection unit corresponding to the first anti-reverse connection device; The second anti-reverse connection device comprises a second common ground output terminal, a second protection unit and a second anti-reverse connection unit; the second anti-reverse connection unit is arranged at the second positive input terminal of the second anti-reverse connection device; wherein the second common ground output terminal is the common ground output terminal of the device circuit corresponding to the second anti-reverse connection device; the second positive input terminal is the positive input terminal of the device circuit corresponding to the second anti-reverse connection device; the second protection unit is the protection unit corresponding to the second anti-reverse connection device; the second anti-reverse connection unit is the anti-reverse connection unit corresponding to the second anti-reverse connection device; The first end of the first protection unit is electrically connected to the first common ground output end; the first end of the second protection unit is electrically connected to the second common ground output end; The second end of the first protection unit and the second end of the second protection unit are connected.

2. The anti-reverse connection system according to claim 1, characterized in that: The first anti-reverse connection device comprises a first negative input terminal, and the first negative input terminal is electrically connected to the first common ground output terminal; The second anti-reverse connection device comprises a second negative input terminal, and the second negative input terminal is electrically connected to the second common ground output terminal; The first negative input terminal and the second negative input terminal are used to be connected to the negative electrode of the power supply; the first positive input terminal and the second positive input terminal are used to be connected to the positive electrode of the power supply.

3. The anti-reverse connection system according to claim 1, characterized in that: The anti-reverse connection unit comprises a diode, a cathode of which is electrically connected to the positive input terminal of the device circuit.

4. The anti-reverse connection system according to claim 1, characterized in that: The protection unit comprises a resettable fuse, and the resettable fuse is used to disconnect when the current flowing through the common ground output terminal is greater than a set value.

5. The anti-reverse connection system according to claim 4, characterized in that: The resettable fuse is also used to restore conduction after the current flowing through the common ground output terminal decreases.

6. The anti-reverse connection system according to claim 1, characterized in that: The negative input terminal and the common ground output terminal of the device circuit are connected. When the negative input terminal is wrongly connected to the positive pole of the power supply and the positive input terminal is wrongly connected to the negative pole of the power supply, the anti-reverse connection unit arranged at the positive input terminal prevents the current from flowing in reverse to prevent damage to the device circuit.

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