Connecting device for liquid leakage detection system

By designing a connection device for a liquid leakage detection system that includes multiple terminals and corresponding openings, the problem that existing connectors cannot meet different wiring requirements is solved, and adaptability to multiple application scenarios is achieved.

CN222654518UActive Publication Date: 2025-03-21SHENZHEN ENVICOOL TECH
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Patent Information

Application Number
CN202420517830.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-15
Publication Date
2025-03-21
Estimated Expiration
2034-03-15

AI Technical Summary

Technical Problem

Existing connectors cannot meet the different wiring requirements of thin film leakage detection electrodes, and cannot adapt to a variety of different application scenarios.

Method used

A connection device for a liquid leakage detection system is designed, including a circuit connector and a housing. A multiple wiring terminal is provided on the circuit connector, and the same number of openings are provided on the housing for inserting different types of lead connectors to realize the connection of multiple wiring requirements.

Benefits of technology

This connection device can meet different wiring needs, adapt to a variety of different application scenarios, and improves the flexibility and applicability of the liquid leakage detection system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a connecting device for a liquid leakage detection system, which comprises a circuit connector and a shell, the circuit connector comprises a circuit board and at least two wiring terminals arranged on the circuit board, the shell is used for accommodating the circuit connector, and the shell is provided with openings with the same number as the wiring terminals. The open holes and the wiring terminals are arranged in a one-to-one correspondence mode, one open hole is used for inserting a first film lead connector or a cable connector to be connected with the wiring terminals, and the other open holes are used for inserting a second film lead connector to be connected with the wiring terminals. Compared with the prior art, the connecting device for the liquid leakage detection system, disclosed by the utility model, can meet different wiring requirements so as to adapt to various different application scenes.
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Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a connecting device for a liquid leakage detection system. Background Art

[0002] For the leakage problem of the pipeline in the liquid cooling server scenario, a leakage detection sensor is usually used for leakage detection. Among them, the leakage detection sensor consists of two parts: a detector and a thin film detection electrode. The length of the thin film detection electrode matches the liquid cooling pipeline. Different pipelines correspond to leakage detection electrodes of different lengths. When installed and used, the thin film leakage detection electrode is wrapped around the outer wall of the liquid cooling plate pipeline. One or both ends of the detection electrode have a thin film lead connector. Multiple detection electrodes are connected through thin film lead connectors and connectors. The detection electrode is finally connected to the detector through the thin film lead connector at the end. The detector detects the signal change of the electrode facing the pipeline side after contacting the leaked coolant through the electrical signal detection to identify whether there is a leakage. For the leakage detection scenario of a single-channel or dual-channel cold plate, the connection between the thin film lead connectors needs to be realized by a 1-to-1 connector. For the leakage detection scenario of four-channel, six-channel or more cold plates, a 1-to-2 or 1-to-4 connector is also required.

[0003] The connectors commonly used at present are generally adapted to cable connectors, but cable connectors cannot meet the different wiring requirements of thin film leakage detection electrodes, nor can they adapt to a variety of different application scenarios.

[0004] Therefore, how to provide a connection device for a liquid leakage detection system that can meet different wiring requirements and adapt to a variety of different application scenarios is a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0005] In view of this, an object of the present invention is to provide a connection device for a liquid leakage detection system, which can meet different wiring requirements and adapt to a variety of different application scenarios.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A connection device for a liquid leakage detection system, comprising:

[0008] A circuit connector, comprising a circuit board, and connection terminals arranged on the circuit board, wherein the number of the connection terminals is at least two;

[0009] A housing for accommodating the circuit connector, the housing being provided with openings having the same number as the connection terminals;

[0010] The openings are arranged in one-to-one correspondence with the connection terminals, one of the openings is used for inserting a first film lead connector or a cable connector to connect to the connection terminal, and the remaining openings are used for inserting a second film lead connector to connect to the connection terminal.

[0011] Optionally, it further comprises waterproof seals, the number of which is the same as the number of the openings, and the waterproof seals are installed in the openings one by one;

[0012] One of the waterproof seals is provided with a through hole for inserting the first film lead connector or the cable connector, and the other waterproof seals are provided with a through hole for inserting the second film lead connector.

[0013] Optionally, the waterproof seal comprises an integrally formed front waterproof protrusion, a rear waterproof protrusion and a waterproof center axis;

[0014] The front waterproof protrusion and the rear waterproof protrusion both protrude from the outer periphery of the waterproof middle axis in radial directions;

[0015] The rear surface of the front waterproof protrusion is sealed with the outer surface of the shell;

[0016] The front surface of the rear waterproof protrusion is sealed with the inner surface of the shell;

[0017] The outer peripheral surface of the waterproof center axis is sealed with the inner surface of the opening of the shell, so that the waterproof seal and the opening form a stepped seal.

[0018] Optionally, the wiring terminal includes a first wiring terminal and a second wiring terminal, the first wiring terminal and the second wiring terminal are electrically connected, and the first wiring terminal and the second wiring terminal have the same structure;

[0019] The first connection terminal is connected to the first film lead connector, and the second connection terminal is connected to the second film lead connector.

[0020] Optionally, the wiring terminal includes a first wiring terminal and a second wiring terminal, the first wiring terminal and the second wiring terminal are electrically connected, and the first wiring terminal and the second wiring terminal have different structures;

[0021] The first connection terminal is connected to the cable connector, and the second connection terminal is connected to the second film lead connector.

[0022] Optionally, the wiring terminal includes a first wiring terminal, a second wiring terminal and a third wiring terminal, the first wiring terminal is electrically connected to the second wiring terminal and the third wiring terminal respectively, and the first wiring terminal, the second wiring terminal and the third wiring terminal have the same structure;

[0023] The first connecting terminal is connected to the first thin film lead connector, and the second connecting terminal and the third connecting terminal are respectively connected to the second thin film lead connector in a one-to-one correspondence.

[0024] Optionally, the wiring terminal includes a first wiring terminal, a second wiring terminal and a third wiring terminal, the first wiring terminal is electrically connected to the second wiring terminal and the third wiring terminal respectively, and the first wiring terminal, the second wiring terminal and the third wiring terminal have different structures;

[0025] The first wiring terminal is connected to the cable connector, and the second wiring terminal and the third wiring terminal are respectively connected to the second film lead connector in a one-to-one correspondence.

[0026] Optionally, the housing includes a bottom shell and an upper cover, and the bottom shell and the upper cover cooperate to form a sealed space for sealing the circuit connector;

[0027] The circuit board and the bottom shell are non-contact detachably fastened.

[0028] Optionally, at least two of the connection terminals are arranged on the same surface of the circuit board and each connection terminal is close to a circumferential side of the circuit board, and / or,

[0029] The height between the connection end of the wiring terminal and the bottom surface of the housing is the same as the height between the opening and the bottom surface of the housing.

[0030] Optionally, at least two fixing seats are provided in the shell, and each fixing seat is provided with a fixing protrusion; the fixing seat and the fixing protrusion form a stepped surface; the stepped surfaces of each fixing seat are on the same surface so that the circuit board is non-contact mounted and fastened to the inner cavity of the shell.

[0031] It can be seen from the above technical scheme that when the liquid cooling pipeline is subjected to leakage detection, the first film lead joint is inserted into one of the openings and connected to its corresponding terminal, and the second film lead joint is inserted into the remaining openings and connected to its corresponding terminal, so as to realize the connection between different film lead joints, or the cable joint is inserted into one of the openings and connected to its corresponding terminal, and the second film lead joint is inserted into the remaining openings and connected to its corresponding terminal, so as to realize the connection between the film lead joint and the cable joint.

[0032] Compared with the prior art, the connection device for the liquid leakage detection system disclosed in the embodiment of the utility model can meet different wiring requirements and thus adapt to various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the exploded structure of a connection device for a liquid leakage detection system provided with two connection terminals disclosed in an embodiment of the utility model;

[0035] Figure 2 It is a schematic diagram of the installation structure of a connection device for a liquid leakage detection system provided with two connection terminals disclosed in an embodiment of the utility model;

[0036] Figure 3 It is a schematic diagram of the exploded structure of a connection device for a liquid leakage detection system provided with three connection terminals disclosed in an embodiment of the utility model;

[0037] Figure 4 This is a schematic diagram of the installation structure of a connection device for a liquid leakage detection system provided with three connection terminals disclosed in an embodiment of the utility model;

[0038] Figure 5 It is a schematic structural diagram of a circuit connector provided with two identical connection terminals disclosed in an embodiment of the utility model;

[0039] Figure 6 It is a schematic structural diagram of a circuit connector provided with two different connection terminals disclosed in an embodiment of the utility model;

[0040] Figure 7 This is a schematic structural diagram of a circuit connector provided with three identical connection terminals disclosed in an embodiment of the utility model;

[0041] Figure 8 This is a schematic structural diagram of a circuit connector with three different connection terminals disclosed in an embodiment of the utility model.

[0042] The names of the components are as follows:

[0043] 100, circuit board; 101, fixing hole; 200, terminal; 201, first terminal; 202, second terminal; 203, third terminal; 300, bottom shell; 301, opening; 302, fixing seat; 303, fixing protrusion; 400, upper cover; 500, waterproof sealing member; 501, through hole; 502, front waterproof protrusion; 503, rear waterproof protrusion; 504, waterproof center axis; 600, first film lead connector; 700, second film lead connector; 800, fixing screw. DETAILED DESCRIPTION

[0044] In view of this, the core of the present invention is to provide a connection device for a liquid leakage detection system, which can meet different wiring requirements to adapt to a variety of different application scenarios.

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] Please refer to Figure 1-Figure 8 ,in, Figure 1 It is a schematic diagram of the exploded structure of a connection device for a liquid leakage detection system provided with two connection terminals disclosed in an embodiment of the utility model; Figure 2 This is a schematic diagram of the installation structure of a connection device for a liquid leakage detection system provided with two connection terminals disclosed in an embodiment of the utility model; Figure 3 It is a schematic diagram of the exploded structure of a connection device for a liquid leakage detection system provided with three connection terminals disclosed in an embodiment of the utility model; Figure 4 This is a schematic diagram of the installation structure of a connection device for a liquid leakage detection system provided with three connection terminals disclosed in an embodiment of the utility model; Figure 5 It is a schematic structural diagram of a circuit connector provided with two identical connection terminals disclosed in an embodiment of the utility model; Figure 6 It is a schematic structural diagram of a circuit connector provided with two different connection terminals disclosed in an embodiment of the utility model; Figure 7 This is a schematic structural diagram of a circuit connector provided with three identical connection terminals disclosed in an embodiment of the utility model; Figure 8 This is a schematic structural diagram of a circuit connector with three different connection terminals disclosed in an embodiment of the utility model.

[0047] Please refer to Figures 1 to 4The connection device for a liquid leakage detection system disclosed in an embodiment of the utility model includes a circuit connector and a shell, wherein the circuit connector includes a circuit board 100 and a wiring terminal 200 arranged on the circuit board 100, and the wiring terminal 200 is at least two. The shell is used to accommodate the circuit connector, and the shell is provided with openings 301 with the same number as the wiring terminal 200. The openings 301 are arranged in a one-to-one correspondence with the wiring terminals 200, and one of the openings 301 is used for inserting a first film lead connector 600 or a cable connector, and the remaining openings 301 are used for inserting a second film lead connector 700.

[0048] When the liquid cooling pipeline is tested for leakage, the first film lead connector 600 is inserted into one of the openings 301 and connected to its corresponding terminal 200, and the second film lead connector 700 is inserted into the remaining openings 301 and connected to its corresponding terminal 200, so as to realize the connection between different film lead connectors, or the cable connector is inserted into one of the openings 301 and connected to its corresponding terminal 200, and the second film lead connector 700 is inserted into the remaining openings 301 and connected to its corresponding terminal 200, so as to realize the connection between the film lead connector and the cable connector.

[0049] Compared with the prior art, the connection device for the liquid leakage detection system disclosed in the embodiment of the utility model can meet different wiring requirements and thus adapt to various application scenarios.

[0050] In order to improve the sealing performance of the circuit connector, the connection device for the leakage detection system disclosed in the embodiment of the utility model further includes a waterproof seal 500, wherein the number of the waterproof seals 500 is the same as the number of the openings 301, and the waterproof seals 500 are installed in the openings 301 one by one.

[0051] It should be noted that one of the waterproof seals 500 is provided with a through hole 501 for inserting the first film lead connector 600 or the cable connector, and the other waterproof seals 500 are provided with a through hole 501 for inserting the second film lead connector 700.

[0052] In this way, the waterproof seal 500 can seal the circuit connector, one end of the first film lead connector 600, one end of the second film lead connector 700 and one end of the cable connector inside the shell, thereby preventing condensation and coolant from affecting the interior thereof, and further enhancing insulation and anti-interference capabilities.

[0053] The embodiment of the present utility model does not limit the specific structure of the waterproof seal 500. As long as the structure meets the use requirements of the present utility model, it is within the protection scope of the present utility model.

[0054] As one possible embodiment, the waterproof seal 500 disclosed in the embodiment of the utility model includes an integrally formed front waterproof protrusion 502 , a rear waterproof protrusion 503 and a waterproof center axis 504 .

[0055] The front waterproof protrusion 502 and the rear waterproof protrusion 503 are both radially protruding from the periphery of the waterproof middle axis 504, the rear surface of the front waterproof protrusion 502 is sealed with the outer surface of the shell, the front surface of the rear waterproof protrusion 503 is sealed with the inner surface of the shell, and the outer surface of the waterproof middle axis 504 is sealed with the inner surface of the opening 301 of the shell, so that the waterproof seal 500 forms a stepped seal with the opening 301. Such an arrangement can further improve the sealing effect of the internal space of the shell.

[0056] It should be explained that the front waterproof protrusion 502 refers to the part placed outside the shell after the waterproof seal 500 is installed in the shell; the rear waterproof protrusion 503 refers to the part placed inside the shell after the waterproof seal 500 is installed in the shell.

[0057] As the first specific embodiment of the utility model, please refer to Figure 5 The wiring terminal 200 disclosed in the embodiment of the utility model includes a first wiring terminal 201 and a second wiring terminal 202, wherein the first wiring terminal 201 and the second wiring terminal 202 are electrically connected, and the first wiring terminal 201 and the second wiring terminal 202 have the same structure.

[0058] Specifically, the first connecting terminal 201 is connected to the first thin film lead connector 600 , and the second connecting terminal 202 is connected to the second thin film lead connector 700 .

[0059] With such configuration, the circuit board 100 can be used as a connection circuit board to achieve connection between different film lead connectors.

[0060] As the second specific embodiment of the present invention, please refer to Figure 6 The wiring terminal 200 disclosed in the embodiment of the present utility model includes a first wiring terminal 201 and a second wiring terminal 202. The first wiring terminal 201 and the second wiring terminal 202 are electrically connected, and the structures of the first wiring terminal 201 and the second wiring terminal 202 are different.

[0061] Specifically, the first wiring terminal 201 is connected to the cable connector, and the second wiring terminal 202 is connected to the second film lead connector 700 .

[0062] With such configuration, the circuit board 100 serves as a circuit adapter board, and can realize the connection between the cable connector and the film lead connector.

[0063] As the third specific embodiment of the present invention, please refer to Figure 7The terminal block 200 disclosed in the embodiment of the utility model includes a first terminal block 201, a second terminal block 202 and a third terminal block 203. The first terminal block 201 is electrically connected to the second terminal block 202 and the third terminal block 203 respectively. The first terminal block 201, the second terminal block 202 and the third terminal block 203 have the same structure.

[0064] Correspondingly, there is one first thin film lead connector 600 and two second thin film lead connectors 700. The first terminal 201 is connected to the first thin film lead connector 600, and the second terminal 202 and the third terminal 203 are respectively connected to the second thin film lead connector 700 in a one-to-one correspondence.

[0065] This arrangement enables connection between three film lead terminals.

[0066] As the fourth specific embodiment of the present invention, please refer to Figure 8 The terminal block 200 disclosed in the embodiment of the utility model includes a first terminal block 201, a second terminal block 202 and a third terminal block 203. The first terminal block 201 is electrically connected to the second terminal block 202 and the third terminal block 203 respectively. The structures of the first terminal block 201, the second terminal block 202 and the third terminal block 203 are different.

[0067] Among them, there is one cable connector and two second film lead connectors 700. The first terminal 201 is connected to the cable connector, and the second terminal 202 and the second terminal 203 are respectively connected to the second film lead connector 700 one by one. In this way, the connection between the two film lead connectors and the cable connector can be realized.

[0068] It should be noted that one end of the cable connector is connected to the film lead connector, and the other end of the cable connector is usually connected to the detector.

[0069] The embodiments of the present invention do not limit the specific structure of the housing, and any structure that meets the use requirements of the present invention is within the protection scope of the present invention.

[0070] As one possible embodiment, the housing disclosed in the embodiment of the utility model includes a bottom shell 300 and an upper cover 400, wherein the bottom shell 300 and the upper cover 400 cooperate to form a sealed space for sealing the circuit connector.

[0071] The embodiment of the utility model does not limit the specific connection method between the circuit board 100 and the bottom shell 300. As long as the structure meets the use requirements of the utility model, it is within the protection scope of the utility model.

[0072] As one possible embodiment, the circuit board 100 and the bottom shell 300 disclosed in the embodiment of the utility model are non-contact detachably fastened.

[0073] As a specific connection method, the circuit board 100 and the bottom shell 300 disclosed in the embodiment of the utility model can be bonded, snap-connected, or screwed.

[0074] When the circuit board 100 and the bottom shell 300 are screwed together, a fixing hole 101 needs to be opened on the circuit board 100 , and the circuit board 100 and the bottom shell 300 are connected by passing the fixing screw 800 through the fixing hole 101 .

[0075] As a further example, please refer to Figure 1 and Figure 3 In the connection device for the liquid leakage detection system disclosed in the embodiment of the utility model, at least two connection terminals are arranged on the same surface of the circuit board 100 and each connection terminal is close to the circumferential side of the circuit board. Such arrangement can save the cost of connecting wires and make the wire layout more regular.

[0076] As a further embodiment, in the connection device for the leakage detection system disclosed in the embodiment of the utility model, the height of the connection end of the terminal block from the bottom surface of the shell is the same as the height of the opening 301 from the bottom surface of the shell. Such an arrangement can further enhance the seismic resistance of the connection device.

[0077] As a further embodiment, the connection device for a liquid leakage detection system disclosed in the embodiment of the utility model has at least two fixing seats 302 disposed in the shell, each fixing seat 302 is provided with a fixing protrusion 303, and the fixing seat 302 and the fixing protrusion 303 form a stepped surface.

[0078] The stepped surfaces of each fixing seat 302 are on the same surface so that the circuit board is fixed to the inner cavity of the housing in a non-contact manner. The above structure allows the wire to be inserted horizontally into the terminal block so that the wire is not subjected to stress.

[0079] The embodiments of the present invention do not limit the specific material of the housing, and any material that meets the use requirements of the present invention is within the protection scope of the present invention.

[0080] As one possible embodiment, the shell disclosed in the embodiment of the utility model is made of flame-retardant lightweight plastic.

[0081] The embodiment of the present invention does not limit the specific material of the waterproof seal 500. As long as the material meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0082] As one possible embodiment, the waterproof seal 500 disclosed in the embodiment of the utility model is made of a flexible or elastic material.

[0083] Specifically, the waterproof sealing member 500 may be flame-retardant rubber, silicone, thermoplastic elastomer, or other materials, which will not be described in detail in the embodiments of the present utility model.

[0084] Finally, it should be noted that, in this article, relational terms such as first and second, etc. 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. Moreover, the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0086] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection device for a liquid leakage detection system, characterized in that: include: A circuit connector, comprising a circuit board, and connection terminals arranged on the circuit board, wherein the number of the connection terminals is at least two; A housing for accommodating the circuit connector, the housing being provided with openings having the same number as the connection terminals; The openings are arranged in one-to-one correspondence with the connection terminals, one of the openings is used for inserting a first film lead connector or a cable connector to connect to the connection terminal, and the remaining openings are used for inserting a second film lead connector to connect to the connection terminal.

2. The connection device for a liquid leakage detection system according to claim 1, characterized in that: It also includes waterproof seals, the number of which is the same as the number of the openings, and the waterproof seals are installed in the openings one by one; One of the waterproof seals is provided with a through hole for inserting the first film lead connector or the cable connector, and the other waterproof seals are provided with a through hole for inserting the second film lead connector.

3. The connection device for a liquid leakage detection system according to claim 2, characterized in that: The waterproof seal comprises an integrally formed front waterproof protrusion, a rear waterproof protrusion and a waterproof middle axis; The front waterproof protrusion and the rear waterproof protrusion both protrude from the outer periphery of the waterproof middle axis in radial directions; The rear surface of the front waterproof protrusion is sealed with the outer surface of the shell; The front surface of the rear waterproof protrusion is sealed with the inner surface of the shell; The outer peripheral surface of the waterproof center axis is sealed with the inner surface of the opening of the shell, so that the waterproof seal and the opening form a stepped seal.

4. The connection device for a liquid leakage detection system according to claim 1, characterized in that: The wiring terminal comprises a first wiring terminal and a second wiring terminal, the first wiring terminal and the second wiring terminal are electrically connected, and the first wiring terminal and the second wiring terminal have the same structure; The first connection terminal is connected to the first film lead connector, and the second connection terminal is connected to the second film lead connector.

5. The connection device for a liquid leakage detection system according to claim 1, characterized in that: The wiring terminal comprises a first wiring terminal and a second wiring terminal, the first wiring terminal and the second wiring terminal are electrically connected, and the first wiring terminal and the second wiring terminal have different structures; The first connection terminal is connected to the cable connector, and the second connection terminal is connected to the second film lead connector.

6. The connection device for a liquid leakage detection system according to claim 1, characterized in that: The wiring terminals include a first wiring terminal, a second wiring terminal and a third wiring terminal, the first wiring terminal is electrically connected to the second wiring terminal and the third wiring terminal respectively, and the first wiring terminal, the second wiring terminal and the third wiring terminal have the same structure; The first connecting terminal is connected to the first thin film lead connector, and the second connecting terminal and the third connecting terminal are respectively connected to the second thin film lead connector in a one-to-one correspondence.

7. The connection device for a liquid leakage detection system according to claim 1, characterized in that: The wiring terminals include a first wiring terminal, a second wiring terminal and a third wiring terminal, the first wiring terminal is electrically connected to the second wiring terminal and the third wiring terminal respectively, and the first wiring terminal, the second wiring terminal and the third wiring terminal have different structures; The first wiring terminal is connected to the cable connector, and the second wiring terminal and the third wiring terminal are respectively connected to the second film lead connector in a one-to-one correspondence.

8. The connection device for a liquid leakage detection system according to claim 1, characterized in that: The housing comprises a bottom shell and an upper cover, wherein the bottom shell and the upper cover cooperate to form a sealed space for sealing the circuit connector; The circuit board and the bottom shell are non-contact detachably fastened.

9. The connection device for a liquid leakage detection system according to claim 1, characterized in that: At least two of the connection terminals are arranged on the same surface of the circuit board and each connection terminal is close to the circumferential side of the circuit board, and / or, The height between the connection end of the wiring terminal and the bottom surface of the housing is the same as the height between the opening and the bottom surface of the housing.

10. The connection device for a liquid leakage detection system according to claim 1, characterized in that: At least two fixing seats are arranged in the shell, and each fixing seat is provided with a fixing protrusion; the fixing seat and the fixing protrusion form a stepped surface; the stepped surface of each fixing seat is on the same surface so that the circuit board is non-contactly mounted and fastened to the inner cavity of the shell.