Leakage protection device with temperature detection function

Abstract

The utility model discloses an earth leakage protection device with a temperature detection function, comprising a temperature acquisition assembly used for acquiring the temperature of an input end in an electrical loop; the temperature acquisition assembly is electrically connected with the circuit board, and the circuit board is used for collecting signals; when a signal acquired by the temperature acquisition assembly exceeds a preset threshold value, the circuit board controls the release to work, thereby realizing disconnection of the moving contact and the static contact. The input end in the electrical loop is detected through the temperature acquisition assembly, the temperature acquisition assembly is sensitive to abnormal high temperature, and the circuit board detects signals and controls the release to act, so that the release disconnects the circuit in time, the leakage protection device is prevented from being burnt down, and property loss and personal safety of a user are protected.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically to a leakage current protection device with temperature detection function. Background Technology

[0002] Residual current devices (RCDs) typically lack temperature detection capabilities. When an RCD experiences poor contact at its input terminal, resulting in high temperatures, it may burn out the RCD or even damage the equipment connected to it. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is how to achieve temperature detection.

[0004] Therefore, a leakage current protection device with temperature detection function includes:

[0005] A temperature acquisition component, wherein the temperature acquisition component is used to acquire the temperature at the input terminal in the electrical circuit;

[0006] The circuit board is electrically connected to the temperature acquisition component, and the circuit board collects signals. When the signal collected by the temperature acquisition component exceeds a preset threshold, the circuit board controls the trip unit to work, thereby disconnecting the moving and stationary contacts.

[0007] The input terminal includes a connection terminal, the connection terminal has a fixing cavity, and the temperature acquisition component extends into the fixing cavity for fixation.

[0008] The connection terminal includes a first connection terminal, a second connection terminal, and a third connection terminal. The first connection terminal has a through hole and is riveted to a terminal block, with the terminal block portion passing through the through hole. The second connection terminal is electrically connected to a contact mechanism. The fixing cavity is located at the third connection terminal.

[0009] The temperature acquisition component includes an acquisition part and a conductive part. The acquisition part extends into the fixed cavity, and the conductive part is electrically connected to the circuit board.

[0010] The fixed cavity is filled with epoxy resin, which surrounds the collecting part and is located between the fixed cavity and the collecting part.

[0011] The second connecting end and the third connecting end are located on both sides of the thickness direction of the first connecting end.

[0012] The number of temperature acquisition components is one, and the temperature acquisition component acquires the temperature of the connection terminal electrically connected to the L pole of the input terminal; or, the number of temperature acquisition components is one, and the temperature acquisition component acquires the temperature of the connection terminal electrically connected to the N pole of the input terminal; or, the number of temperature acquisition components is two, and the temperature acquisition components acquire the temperature of the connection terminal electrically connected to the L pole of the input terminal and the temperature of the connection terminal electrically connected to the N pole of the input terminal, respectively.

[0013] It also includes a base and a limiting member, the limiting member being connected to the base and forming a limiting groove with the base, through which the temperature acquisition component passes.

[0014] One of the base and the limiting member is provided with a fixing post, and the other of the base and the limiting member is provided with a fixing hole that cooperates with the fixing post.

[0015] The base is provided with a guide plate; or, the limiting member is provided with a guide plate.

[0016] The technical solution of this utility model has the following advantages:

[0017] 1. The present invention provides a leakage current protection device with temperature detection function. The temperature acquisition component detects the input terminal in the electrical circuit. The temperature acquisition component is sensitive to abnormally high temperatures. When the circuit board detects the signal, it controls the trip unit to act, so that the circuit is disconnected in time, avoiding the leakage current protection device from burning out, and also protecting the user's property loss and personal safety.

[0018] 2. This utility model provides a leakage current protection device with temperature detection function. Through the setting of the fixing cavity, the temperature acquisition component is fixed and the detection effect is achieved, forming a fit or contact between the temperature acquisition component and the connecting terminal, thus improving the detection accuracy. Alternatively, the temperature acquisition component can be combined with exposed conductive material to form detection through other methods. For example, the temperature acquisition component can be directly bonded and fixed to the exposed conductive material, with the fixation between the two formed by other components inside the leakage current protection device.

[0019] 3. This utility model provides a leakage current protection device with temperature detection function. In this structural arrangement, the first connecting end is located in the middle area, forming a terminal block. This first connecting end can be connected to either an input or output end. The second and third connecting ends are respectively connected to the outer wall of the first connecting end, forming wiring effects in different orientations. This is suitable for special working environments, and the different wiring orientations can meet product performance requirements. The entire connecting terminal is integrally molded, with a simple structure, convenient assembly, and high production efficiency. The terminal block is riveted to the first connecting end to form an electrical connection between them, making processing more convenient. Alternatively, the terminal block can also be welded to the first connecting end for connection and fixation.

[0020] 4. The present invention provides a leakage protection device with temperature detection function. Epoxy resin serves to fix the temperature acquisition component. At the same time, epoxy resin also has thermal conductivity, making the data collected by the temperature acquisition component more accurate.

[0021] 5. The present invention provides a leakage protection device with temperature detection function. Here, the two sides refer to the second connection end and the third connection end being respectively located on the left and right sides of the first connection end, which makes the overall layout better, meets the assembly requirements, and improves the processing quality.

[0022] 6. The present invention provides a leakage protection device with temperature detection function. The temperature acquisition components can be selected in appropriate quantities according to actual needs, as well as the corresponding electrodes for detection, so that the temperature acquisition is more accurate.

[0023] 7. The present invention provides a leakage protection device with temperature detection function. The limiting component cooperates with the base to form a limiting and fixing effect on the temperature acquisition component, so that the wiring is smooth and neat after assembly and will not be scattered.

[0024] 8. This utility model provides a leakage current protection device with temperature detection function. The fixing post and fixing hole cooperate to form a connection and fixation between the base and the limiting member. Here, the fixing post and fixing hole can be an interference fit, which makes it convenient for employees to assemble and improves assembly efficiency. In addition, the fixing effect between the base and the limiting member can also be formed by snap-fit ​​connection or bolt connection.

[0025] 9. The leakage protection device with temperature detection function provided by this utility model has a guide plate that guides the temperature acquisition component, making wiring more convenient. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A partial structural diagram of a leakage current protection device with temperature detection function provided by this utility model;

[0028] Figure 2 A partial cross-sectional view of a leakage current protection device with temperature detection function provided by this utility model;

[0029] Figure 3 A schematic diagram illustrating the structure of the base and the limiting component provided by this utility model;

[0030] Figure 4 Exploded view of the base and limiting component provided by this utility model;

[0031] Figure 5 A partial structural diagram of a leakage current protection device with temperature detection function provided by this utility model from another angle;

[0032] Figure 6 A schematic diagram of the structure of the connection terminal provided by this utility model;

[0033] Figure 7 This is a schematic diagram of the structure of the connecting terminal after riveting provided by this utility model;

[0034] Figure 8 A schematic diagram of the structure of the connection terminal provided by this utility model in conjunction with the first conductor and the temperature acquisition component;

[0035] Figure 9 A schematic diagram of the temperature acquisition component provided by this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 11. Temperature acquisition component; 12. Stationary contact; 13. Moving contact; 14. Circuit board; 16. Locking plate; 17. Operating component; 18. Trip unit; 19. Connecting terminal; 20. Terminal block; 21. First conductor; 22. Base; 23. Limiting component; 24. Limiting groove; 25. Fixing post; 26. Fixing hole; 27. Guide plate; 111. Acquisition part; 112. Conductive part; 191. Fixing cavity; 192. First connecting end; 193. Second connecting end; 194. Third connecting end; 195. Through hole; 196. First flange; 197. Second flange. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0042] Example 1

[0043] This embodiment provides a leakage current protection device with temperature detection function, as shown in the attached figure. Figure 1-9 Shown, including:

[0044] Temperature acquisition component 11 is used to acquire the temperature at the input terminal of the electrical circuit. One end of the input terminal is electrically connected to an external circuit, and the other end cooperates with the moving contact 13 to form an electrical connection. The input terminal portion is located outside the leakage current protection device to form an electrical connection with the external circuit, while the remaining portion is located inside the leakage current protection device to cooperate with the stationary contact 12 to achieve an electrical connection. In this embodiment, the temperature acquisition component 11 is located inside the leakage current protection device to detect the temperature at the input terminal. Here, the temperature acquisition component 11 can be in close contact with the input terminal to acquire a temperature signal, or it can be used in an intermittent manner to achieve a sensing detection effect.

[0045] Circuit board 14 is electrically connected to temperature acquisition component 11. Circuit board 14 collects signals and is located inside the leakage current protection device. When the signal collected by temperature acquisition component 11 exceeds a preset threshold, circuit board 14 controls the trip unit to operate, realizing the disconnection of moving and stationary contacts. The preset threshold can be adjusted by those skilled in the art according to actual needs, and will not be described in detail here. In the prior art, the contact mechanism is housed inside the leakage current protection device. The contact mechanism includes a moving contact frame, a stationary contact 12, and a moving contact 13. The moving contact 13 is mounted on the moving contact frame. Locking plate 16 is rotatably connected to the moving contact frame and is linked with operating component 17. When the leakage current protection device is in the off state, operating component 17 and locking plate 16 are in the unlocked state; operating component 17 moves down, locking operating component 17 and locking plate 16, driving the moving contact frame to move, thereby realizing the connection between moving contact 13 and stationary contact 12. When the temperature exceeds the preset threshold, circuit board 14 controls trip unit 18 to operate. The moving iron core of trip unit 18 pushes locking plate 16, causing locking plate 16 to separate from operating component 17, thus unlocking the circuit. At this time, the moving contact frame resets, realizing the disconnection of moving and stationary contacts and breaking the circuit. The temperature acquisition component 11 detects the input terminal in the electrical circuit. The temperature acquisition component 11 is sensitive to abnormally high temperatures. When circuit board 14 detects the signal, it controls trip unit 18 to operate, causing it to disconnect the circuit in time, preventing the leakage protection device from burning out, and protecting the user's property and personal safety.

[0046] Specifically, as shown in the attached document Figure 1-9As shown, the input terminal includes a connection terminal 19, which has a fixing cavity 191. The temperature acquisition component 11 extends into and is fixed within the fixing cavity 191. The fixing cavity 191 ensures the fixation and detection of the temperature acquisition component 11, creating a fit or contact between the temperature acquisition component 11 and the connection terminal 19, thus improving detection accuracy. The temperature acquisition component 11 is used to detect the temperature of the connection terminal 19. Alternatively, the temperature acquisition component 11 can be used in other ways to cooperate with exposed conductive materials for detection. For example, the temperature acquisition component 11 can be directly bonded and fixed to the exposed conductive material, with the fixation between the two achieved through other components within the leakage current protection device.

[0047] Specifically, as shown in the attached document Figure 6-8 As shown, the connection terminal 19 includes a first connection terminal 192, a second connection terminal 193, and a third connection terminal 194, providing three connection terminals for connection. The first connection terminal 192 is riveted or welded to the terminal block 20 to form part of the input terminal, making processing easier. Alternatively, the terminal block 20 can also be welded to the first connection terminal 192 for fixation. The first connection terminal 192 can also form an electrical connection with other conductive wiring structures. The terminal block 20 is used to connect to an external circuit to form a current input effect.

[0048] The second connecting end 193 and the third connecting end 194 are respectively connected to the outer wall of the first connecting end 192. It should be noted that the connection points of the second connecting end 193 and the first connecting end 192 are not located at the same position as the connection points of the third connecting end 194 and the first connecting end 192. The first connecting end 192, the second connecting end 193, and the third connecting end 194 are integrally formed. Here, the first connecting end 192, the second connecting end 193, and the third connecting end 194 are electrically connected to each other and are all made of conductive metal. The second connecting end 193 is electrically connected to the stationary contact 12. The electrical connection between the second connecting end 193 and the stationary contact 12 can be achieved through a wire or conductive sheet.

[0049] With this structural design, the first connecting end 192 is located in the middle area, forming a terminal structure. Here, the first connecting end 192 can be connected to either an input or output terminal. The second connecting end 193 and the third connecting end 194 are respectively connected to the outer wall of the first connecting end 192, forming wiring effects in different orientations. This is suitable for special working environments, and the wiring in different orientations can meet product performance requirements. The entire connecting terminal 19 is integrally molded, with a simple structure, convenient assembly, and high production efficiency. The terminal block 20 is riveted to the first connecting end 192 to form an electrical connection between them, making processing more convenient. Alternatively, the terminal block 20 can also be welded to the first connecting end 192 for connection and fixation.

[0050] Specifically, the first connecting end 192 is provided with a through hole 195, which extends along the thickness direction of the first connecting end 192. Taking a coordinate axis as an example, the axial direction of the through hole 195 is the Z-axis direction. The terminal 20 passes through the through hole 195 and is then riveted to achieve a riveting and fixing effect between the terminal 20 and the first connecting end 192. After riveting, an electrical connection is formed between the terminal 20 and the first connecting end 192.

[0051] Specifically, as shown in the attached document Figure 6-8 As shown, the second connecting end 193 is provided with a first flange 196, which is located on the side of the second connecting end 193. Here, the first flange 196 is located on both the front and rear sides of the second connecting end 193. During the riveting process, the first flange 196 on the front side flips towards the rear, and the first flange 196 on the rear side flips towards the front, forming a riveting fixation of the first conductor 21. At this time, the first conductor 21 is electrically connected to the second connecting end 193. The first conductor 21 can be a wire or other conductive material. When the first conductor 21 is a wire, the metal part inside the wire forms an electrical connection with the second connecting end 193. The first flange 196, after riveting, forms a connection and fixation of the first conductor 21, simultaneously creating an electrical connection between the second connecting end 193 and the first conductor 21. The other end of the first conductor 21 is electrically connected to the stationary contact 12.

[0052] Specifically, as shown in the attached document Figure 6-8 As shown, the third connecting end 194 is provided with a second flange 197, which is located on the side of the third connecting end 194. Here, the second flange 197 is located on both the front and rear sides of the third connecting end 194. By riveting, the two second flanges 197 surround each other to form a fixing cavity 191. The fixing cavity 191 is used to fix the temperature acquisition component 11. It should be noted that the acquisition part 111 of the temperature acquisition component 11 is located inside the fixing cavity 191, the conductive part 112 of the temperature acquisition component 11 extends to the outside of the fixing cavity 191, and the pins of the temperature acquisition component 11 are used to connect with the circuit board 14 to form a communication of detection signals.

[0053] Specifically, as shown in the attached document Figure 9 As shown, the temperature acquisition component 11 includes an acquisition part 111 and a conductive part 112. The acquisition part 111 extends into the fixed cavity 191, and the conductive part 112 is electrically connected to the circuit board 14.

[0054] Specifically, the fixing cavity 191 is filled with epoxy resin. The second flange 197 is riveted to form the fixing cavity 191, which can be used to fix the temperature acquisition component 11. The epoxy resin surrounds the acquisition part 111, and the epoxy resin is located between the fixing cavity 191 and the acquisition part 111. Here, the temperature acquisition component 11 can collect the temperature of the connection terminal 19, and the circuit board 14 can determine whether the electrical circuit is working properly. The epoxy resin serves to fix the temperature acquisition component 11, and at the same time, the epoxy resin also has a thermal conductivity, making the data collected by the temperature acquisition component 11 more accurate. The circuit board 14 is equipped with a control unit for judging whether the temperature signal is normal and controlling the trip unit operation.

[0055] Specifically, the second connecting end 193 and the third connecting end 194 are located on both sides of the thickness direction of the first connecting end 192. Here, the thickness direction is the Z-axis direction, which means that the second connecting end 193 and the third connecting end 194 are respectively located on the left and right sides of the first connecting end 192, resulting in a better overall layout, meeting assembly requirements, and improving processing quality.

[0056] Specifically, the first connecting end 192 can be circular, square, or hexagonal, etc.

[0057] Specifically, the first connecting end 192, the second connecting end 193, and the third connecting end 194 are integrally formed by stamping. Stamping makes processing more convenient and faster. The connecting terminals 19 are formed by stamping on the same sheet metal and then riveting to create an electrical connection between different connecting ends and different conductive parts.

[0058] Specifically, the connection terminal 19 may also include a fourth connection terminal, a fifth connection terminal, etc., and those skilled in the art can add the corresponding number of connection terminals according to actual needs.

[0059] Specifically, the temperature acquisition component 11 can be a thermistor NTC, a temperature sensor PT100, or a temperature sensor PT1000, etc.

[0060] Specifically, the number of temperature acquisition components 11 is one, which acquires the temperature of the connection terminal 19 electrically connected to the input terminal L. Alternatively, the number of temperature acquisition components 11 is one, which acquires the temperature of the connection terminal 19 electrically connected to the input terminal N. Alternatively, the number of temperature acquisition components 11 is two, which acquire the temperatures of both the connection terminal 19 electrically connected to the input terminal L and the connection terminal 19 electrically connected to the input terminal N, thus achieving a dual detection effect and further improving the accuracy of the detection. The number of temperature acquisition components 11 and the corresponding electrodes to be detected can be selected according to actual needs, making the temperature acquisition more accurate.

[0061] Specifically, as shown in the attached document Figure 3-4 As shown, the system also includes a base 22 and a limiting member 23. A connecting terminal 19 is connected and fixed to the base 22, and the circuit board 14 is located above the base 22. The limiting member 23 is connected to the base 22, forming a limiting groove 24. The temperature acquisition component 11 passes through the limiting groove 24; specifically, the conductive part 112 passes through the limiting groove 24 and extends to connect with the circuit board 14, forming an electrical connection between the temperature acquisition component 11 and the circuit board 14. The cooperation between the limiting member 23 and the base 22 ensures that the conductive part 112 of the temperature acquisition component 11 has a smooth and neat wiring path, preventing scattering. When there are two temperature acquisition components 11, there are also two limiting members 23, forming two limiting grooves 24 with the base 22.

[0062] Specifically, as shown in the attached document Figure 3-4 As shown, one of the base 22 and the limiting member 23 is provided with a fixing post 25, and the other of the base 22 and the limiting member 23 is provided with a fixing hole 26 that mates with the fixing post 25. The mating of the fixing post 25 and the fixing hole 26 forms a connection and fixation between the base 22 and the limiting member 23. Here, the fixing post 25 and the fixing hole 26 can be an interference fit, making it convenient for employees to assemble and improving assembly efficiency. In addition, the fixing effect between the base 22 and the limiting member 23 can also be achieved by a snap-fit ​​connection or a bolt connection. In this embodiment, one limiting member 23 is provided with two fixing posts 25, and the base 22 is provided with four fixing holes 26. The two limiting members 23 respectively mate with the four fixing holes 26 to form a limiting groove 24.

[0063] Specifically, as shown in the attached document Figure 3-4 As shown, the base 22 is provided with a guide plate 27. Alternatively, the limiting member 23 is provided with a guide plate 27. The guide plate 27 provides a guiding effect for the temperature acquisition component 11, making wiring more convenient.

[0064] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A leakage current protection device with temperature detection function, characterized in that, include: Temperature acquisition component (11), the temperature acquisition component (11) is used to acquire the temperature of the input terminal in the electrical circuit; The circuit board (14) is electrically connected to the temperature acquisition component (11), and the circuit board (14) collects signals. When the signal collected by the temperature acquisition component (11) exceeds the preset threshold, the circuit board (14) controls the trip unit (18) to work, so as to realize the disconnection of the moving and stationary contacts (12).

2. The leakage current protection device with temperature detection function according to claim 1, characterized in that, The input terminal includes a connection terminal (19), the connection terminal (19) is provided with a fixing cavity (191), and the temperature acquisition component (11) extends into the fixing cavity (191) for fixing.

3. The leakage current protection device with temperature detection function according to claim 2, characterized in that, The connection terminal (19) includes a first connection terminal (192), a second connection terminal (193), and a third connection terminal (194). The first connection terminal (192) is riveted or welded to the terminal block (20), and the second connection terminal (193) is electrically connected to the contact mechanism. The fixing cavity (191) is disposed at the third connection terminal (194).

4. The leakage current protection device with temperature detection function according to claim 2 or 3, characterized in that, The temperature acquisition component (11) includes an acquisition part (111) and a conductive part (112). The acquisition part (111) extends into the fixed cavity (191), and the conductive part (112) is electrically connected to the circuit board (14).

5. The leakage current protection device with temperature detection function according to claim 4, characterized in that, The fixed cavity (191) is filled with epoxy resin, which surrounds the collecting part (111) and is located between the fixed cavity (191) and the collecting part (111).

6. The leakage current protection device with temperature detection function according to claim 3, characterized in that, The second connecting end (193) and the third connecting end (194) are located on both sides of the thickness direction of the first connecting end (192).

7. The leakage current protection device with temperature detection function according to claim 2, characterized in that, The number of temperature acquisition components (11) is one, and the temperature acquisition component (11) acquires the temperature of the connection terminal (19) electrically connected to the input terminal L pole; or, the number of temperature acquisition components (11) is one, and the temperature acquisition component (11) acquires the temperature of the connection terminal (19) electrically connected to the input terminal N pole; or, the number of temperature acquisition components (11) is two, and the temperature acquisition component (11) acquires the temperature of the connection terminal (19) electrically connected to the input terminal L pole and the temperature of the connection terminal (19) electrically connected to the input terminal N pole, respectively.

8. The leakage current protection device with temperature detection function according to claim 1, characterized in that, It also includes a base (22) and a limiting member (23), the limiting member (23) being connected to the base (22), the limiting member (23) and the base (22) forming a limiting groove (24), and the temperature acquisition component (11) passing through the limiting groove (24).

9. The leakage current protection device with temperature detection function according to claim 8, characterized in that, One of the base (22) and the limiting member (23) is provided with a fixing post (25), and the other of the base (22) and the limiting member (23) is provided with a fixing hole (26) that cooperates with the fixing post (25).

10. The leakage current protection device with temperature detection function according to claim 8, characterized in that, The base (22) is provided with a guide plate (27); or, the limiting member (23) is provided with a guide plate (27).

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