A discharge module and surge protector

Abstract

The utility model relates to electric appliance protection device technical field, especially a kind of discharge module and surge protector, it includes graphite electrode and trigger electrode structure, trigger electrode structure is located at the both sides of graphite electrode, trigger electrode structure includes electrode frame and the elastic electrode on electrode frame, and elastic electrode includes contact part, the both ends of contact part are bent to form support part to the direction of electrode frame, support part is abutted on electrode frame to make contact part protrude from electrode frame to the direction of graphite electrode, and contact part is electrically connected with graphite electrode;By the both ends of contact part are bent to form oblique support part, for supporting make contact part protrude from electrode frame to the direction of graphite multi-gap structure, ensure that contact part and graphite electrode form high reliable contact, avoid bad contact.

Description

Technical Field

[0001] This utility model relates to the field of electrical protection devices, and in particular to a discharge module and a surge protector. Background Technology

[0002] A surge protection device (SPD), also known as a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When a surge current or voltage spike suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and divert the current in a very short time, limiting the instantaneous overvoltage to the voltage range that the equipment or system can withstand, or diverting the powerful lightning current to the ground, protecting the protected equipment or system from the impact, thereby preventing damage to other equipment in the circuit from the surge.

[0003] Most existing surge protectors use a graphite multi-gap structure as the discharge module and set trigger structures on both sides. However, the elastic electrode and the graphite electrode of this type of structure are often in point contact, and there is a failure problem caused by poor contact.

[0004] It should be noted that the information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] To address the technical problem of poor contact leading to failure in existing surge protectors, this invention provides a discharge module comprising a graphite electrode and a trigger electrode structure.

[0006] The trigger electrode structure is located on both sides of the graphite electrode, and the trigger electrode structure includes an electrode frame and an elastic electrode disposed on the electrode frame; The elastic electrode includes a contact portion, the two ends of which are bent toward the electrode frame to form a support portion. The support portion abuts against the electrode frame so that the contact portion protrudes from the electrode frame toward the graphite electrode, and the contact portion is electrically connected to the graphite electrode.

[0007] Furthermore, the heights of the two highest points of the support portion from the upper surface of the electrode frame are equal.

[0008] Furthermore, the electrode frame is provided with an electrode groove, the electrode groove is provided with a protrusion, and through holes are opened from the inside to the outside of both sides of the protrusion. A first limiting part and a second limiting part are formed at the non-empty positions corresponding to the through holes, and the first limiting part and the second limiting part and the through holes form a deformation groove.

[0009] Furthermore, the elastic electrode is located within the electrode groove, with both ends of the elastic electrode passing through the deformation groove and abutting against the first limiting portion and the second limiting portion, respectively. The contact portion is suspended above the protrusion via the support portion. One end of the support portion extends and bends through the deformation groove and abuts against the first limiting portion to form a first end. The other end of the support portion extends into the deformation groove to form a deformation portion and continues to extend and bend outward from the electrode frame to form a second end. The second end abuts against the second limiting portion.

[0010] Furthermore, the included angle α between the support portion and the contact portion is an obtuse angle; the length of the contact portion is not less than one-third of the total length of the graphite electrode contact surface.

[0011] Furthermore, there are multiple graphite electrodes, and an insulating pad is provided between two adjacent graphite electrodes to form a graphite multi-gap structure; the number of elastic electrodes matches the number of graphite electrodes.

[0012] Furthermore, the discharge module also includes a first PCB, which is disposed on the graphite multi-gap structure. The second end of the elastic electrode passes through the first PCB and is electrically connected to the first PCB. A capacitor is provided on the first PCB.

[0013] Furthermore, this utility model also provides a surge protector, comprising the above-mentioned discharge module, wherein the surge protector further comprises: A fixed frame, on which the discharge module is mounted; A temperature-sensitive alloy, wherein the temperature-sensitive alloy is electrically connected to the first electrode; An energy storage tripping mechanism is mounted on the fixed frame and is electrically connected to the temperature-sensing alloy. The electronic alarm mechanism includes two conductive springs mounted on the fixed frame. The energy storage tripping mechanism can compress the two conductive springs to achieve electrical connection.

[0014] Furthermore, the energy storage tripping mechanism includes a spring, a slider, and an elastic element. One end of the spring is electrically connected to the first electrode through the temperature-sensing alloy, and the end of the spring away from the temperature-sensing alloy extends to form a second pin. The slider is movably mounted on the fixed frame and can move and switch between the normal working position and the tripping position. The two ends of the elastic element are respectively connected to the slider and the fixed frame.

[0015] Furthermore, the electronic alarm mechanism includes a second PCB, and the two conductive springs are a first trigger spring and a second trigger spring. The first trigger spring, the second trigger spring, and the remote signaling pin are disposed on the second PCB, and the first trigger spring and the second trigger spring are electrically connected to the remote signaling pin through the second PCB. The slider has an isolation part and a pressing part. The isolation part is placed between the first trigger spring and the second trigger spring, and the pressing part can squeeze the first trigger spring and the second trigger spring into contact. When the slider is in the normal working position, the pressing part squeezes the first trigger spring and the second trigger spring to press each other to form an electrical connection. When the slider is in the tripped position, the first trigger spring and the second trigger spring are separated by the isolation part.

[0016] Based on the above, the discharge module and surge protector provided by this utility model, compared with the prior art, form an oblique support by bending both ends of the contact part away from the graphite multi-gap structure. The oblique support abuts against the electrode frame to support the contact part so that the contact part protrudes from the electrode frame in the direction of the graphite multi-gap structure, ensuring stable contact between the contact part and the graphite multi-gap structure, realizing conduction. In addition, the oblique support part can accumulate elastic potential energy to ensure complete contact between the contact part and the graphite multi-gap structure, avoiding failure caused by poor contact. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the 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 based on these drawings without creative effort. Unless otherwise specified, the positional relationships shown in the drawings in the following description are based on the direction in which the components are drawn in the figures.

[0018] Figure 1 This is a schematic diagram of the structure of a discharge module provided in an embodiment of the present invention; Figure 2 This is an exploded structural diagram of a discharge module provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the trigger electrode structure provided in an embodiment of the present invention; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure at point AA; Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at point BB; Figure 6 for Figure 5 A magnified schematic diagram of the local structure at point N; Figure 7 This is an exploded structural diagram of the surge protector provided in the second embodiment of the present invention; Figure 8 A schematic diagram of the energy storage tripping mechanism and electronic alarm mechanism provided in the second embodiment of this utility model; Figure 9 A schematic diagram showing the state of the energy storage tripping mechanism and the electronic alarm mechanism after tripping, as provided in the second embodiment of this utility model; Figure 10 The circuit diagram of the surge protector provided in the second embodiment of this utility model.

[0019] Figure label: Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "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. They 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 on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof mean "at least comprising."

[0022] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a discharge module provided in an embodiment of the present invention; Figure 2 This is an exploded structural diagram of a discharge module provided in an embodiment of the present invention.

[0023] To address the technical problem of poor contact leading to failure in existing surge protectors, or to achieve at least one or more advantages, this utility model provides a discharge module 100. As shown in the figure, the discharge module 100 includes a graphite electrode 10 and a trigger electrode structure 20.

[0024] The number of graphite electrodes 10 can be N (N>2), and they are made of high-purity graphite material, possessing excellent conductivity, high temperature resistance (able to withstand the instantaneous high temperature during surge discharge), and arc erosion resistance (reducing material loss after discharge). An insulating sheet 11 is provided between two adjacent graphite electrodes 10 to separate adjacent graphite electrodes 10, maintain the gap distance between adjacent graphite electrodes 10, form a multi-gap graphite structure, ensure insulation performance under normal operating conditions, and prevent accidental discharge.

[0025] When the discharge module 100 is under normal voltage, the gaps between the graphite electrodes 10 remain insulated due to the insulating sheet 11, and the discharge module 100 is not conductive, thus not affecting the normal operation of the circuit. When an overvoltage occurs, the voltage exceeds the gap breakdown threshold, and the gaps between adjacent graphite electrodes 10 break down rapidly, forming a conductive path that eliminates the surge current, thereby preventing damage to other equipment in the circuit from overvoltage or surge.

[0026] Preferably, the number of insulating sheets 11 can be N-1, and they are made of high-strength insulating materials with a temperature resistance of ≥400℃, such as ceramics, mica, or high-temperature resistant resins.

[0027] There are two trigger electrode structures 20, which are located on opposite sides of the graphite electrode 10. Specifically, each trigger electrode structure 20 includes an electrode frame 21 and a number of elastic electrodes 22 arranged at intervals on the electrode frame 21.

[0028] When the trigger electrode structure 20 is fixed on both sides of the graphite electrode 10, the elastic electrode 22 is electrically connected to the graphite electrode 10. When an overvoltage occurs, the elastic electrode 22 and the graphite electrode 10 conduct, forcing the gap between adjacent graphite electrodes 10 to be quickly broken down to form a conductive channel, thus eliminating the surge current.

[0029] The electrode frame 21 can be made of a material with high temperature resistance, high flame retardancy, and high insulation, such as PA66 + glass fiber, and is used to fix the elastic electrode 22. The elastic electrode 22 can be made of a material with high elasticity and high conductivity, such as beryllium copper alloy.

[0030] In specific implementation, such as Figures 3-5As shown, electrode slots adapted to the elastic electrode 22 can be formed on the electrode frame 21. The electrode slots are provided with protrusions 211, and through holes are designed on both sides of the protrusions 211 from the inside to the outside. The non-hole positions corresponding to the through holes form a first limiting part 212 and a second limiting part 213. The first limiting part 212 and the second limiting part 213 form a deformation groove 214 with the through holes.

[0031] The elastic electrode 22 includes a contact portion 221. Both ends of the contact portion 221 are bent toward the electrode frame 21 to form support portions 222. When the elastic electrode 22 is placed in the electrode groove, both ends of the elastic electrode 22 pass through the deformation groove 214 and abut against the first limiting portion 212 and the second limiting portion 213, respectively. The contact portion 221 is suspended above the protrusion 211 by the support portion 222, so that the contact portion 221 protrudes from the electrode frame 21 toward the graphite electrode 10.

[0032] Preferably, the height from the highest point of the two support portions 222 to the upper surface of the protrusion 211 is equal, so as to ensure that the protrusion height on both sides of the contact portion 221 is balanced and to avoid the problem of poor contact caused by the reduction of the contact area due to the difference in height on both sides.

[0033] Based on the above, the right end support 222 is bent and abuts against the upper surface of the protrusion 211. After extending along the protrusion 211, it is bent again and inserted into the deformation groove to form the first end 223. The first end 223 abuts against the surface of the first limiting part 212 due to elasticity. After the left end support 222 abuts against the upper surface of the protrusion 211, it extends into the deformation groove to form the deformation part 224. It continues to extend and bend outward from the electrode frame 21 to form the second end 225. The second end 225 abuts against the surface of the second limiting part 213 due to elasticity.

[0034] The cooperation of the first limiting part 212, the protrusion 211, the second limiting part 213, and the deformation groove 214 allows the elastic electrode 22 to pass through while also limiting its movement, thus fixing the elastic electrode 22 relatively on the electrode frame 21. At the same time, the deformation groove 214 provides space for the deformation of the first end 223 and the deformation part 224, allowing the elastic electrode 22 to fit more tightly with the graphite electrode 10.

[0035] When the trigger electrode structure 20 is fixed on both sides of the graphite electrode 10, the contact part 221 abuts against the graphite electrode 10 to achieve electrical connection. At this time, the deformation part 224 and the first end 223 can be deformed under force in the deformation groove 214, and in conjunction with the second limiting part 213, elastic potential energy is accumulated, forcing the contact part 221 to press tightly against the graphite electrode 10, ensuring highly reliable contact and avoiding the problem of failure due to poor contact.

[0036] Preferably, the inner wall of the deformation groove 214 can be sloping to provide a support surface for the deformed second end 225 and prevent it from being over-deformed.

[0037] Preferably, the shape of the contact portion 221 can be the same as the shape of the contact surface of the graphite electrode 10 to ensure the stability of the electrical contact between the graphite electrode 10 and the contact portion 221, such as the elongated shape chosen in this embodiment. In addition, the cross-sectional shape of the elastic electrode 22 can be circular, square, or other shapes, and this invention is not limited to this.

[0038] Preferably, the length of the contact portion 221 is not less than one-third of the total length of the contact surface of the graphite electrode 10 to ensure sufficient contact between the two. Specifically, the contact surface of the graphite electrode 10 is the end face of the graphite electrode 10 that contacts the elastic electrode 22.

[0039] In some preferred embodiments, such as Figure 6 As shown, the height h of the contact portion 221 protruding from the electrode frame 21 can be 0.1-1 mm. Preferably, the height h of the contact portion 221 protruding from the electrode frame 21 is 0.17 mm.

[0040] Furthermore, the angle α between the support portion 222 and the contact portion 221 is an obtuse angle. This facilitates the contact portion 221 fitting snugly against the protrusion 211 of the electrode frame 21 after it is flattened.

[0041] Based on the above, the discharge module 100 also includes a first PCB 30. The first PCB 30 is disposed on the graphite multi-gap structure. The second end 225 leads out of the electrode frame 21, passes through the first PCB 30, and is electrically connected to the first PCB 30. The first PCB 30 can improve the functionality, reliability, and intelligence level of the discharge module 100 through circuit integration and signal processing, such as signal acquisition and status detection, trigger control and coordinated discharge, fault alarm and status feedback, circuit integration and anti-interference optimization, auxiliary protection and lifespan management, etc.

[0042] Furthermore, a capacitor 31 is provided on the first PCB 30. When an overvoltage occurs, the surge energy of the surge voltage conducts through the elastic electrode 22 to the capacitor 31, charging the capacitor 31 first. During the rapid energy storage process of the capacitor 31, the voltage across its terminals increases synchronously with the surge voltage. When the voltage reaches the breakdown threshold of the graphite multi-gap structure, the gaps break down rapidly to form a low-impedance path, eliminating the surge current. Preferably, capacitor 31 can be a high-voltage capacitor.

[0043] Understandably, to ensure the electrical safety distance between capacitors 31, the two trigger electrode structures 20 located on both sides of the graphite electrode 10 can be staggered when arranging the elastic electrodes 22, meaning that each elastic electrode 22 is electrically connected to only one graphite electrode 10. Of course, they can also be arranged side by side, depending on actual needs.

[0044] Furthermore, the discharge module 100 also includes a first electrode 40, a second electrode 50, and a first pin 60. The first electrode 40 and the second electrode 50 are located at the upper and lower ends of the graphite multi-gap structure, respectively, and are connected to the graphite electrode 10 (they are not conductive under normal conditions, but become conductive after surge breakdown, forming an electrical connection). The first electrode 40 and the second electrode 50 can be made of materials with high conductivity, such as copper alloys, and have nickel, tin, or other plating layers formed on their surfaces.

[0045] The first pin 60 is disposed between the graphite electrode 10 and the second electrode 50, and forms an electrical connection with the graphite electrode 10 and the second electrode 50 respectively. The first pin 60 serves as the lead end of the graphite electrode 10, enabling connection to external circuits and reducing contact resistance.

[0046] In another specific embodiment, such as Figures 7-10 As shown, this utility model also provides a surge protector, which includes the above-mentioned discharge module 100. The surge protector also includes a fixed frame 200, a temperature-sensing alloy (conventional technology, not shown in the figure), an energy storage tripping mechanism 300, and an electronic alarm mechanism 400.

[0047] The fixing frame 200 is used to fix the discharge module 100 and to provide a basic mounting position for the energy storage tripping mechanism 300 and the electronic alarm mechanism 400. Preferably, the fixing frame 200 can be made of the same material as the electrode frame 21, which has high temperature resistance, high flame retardancy, and high insulation, such as PA66 + glass fiber, etc., so as to ensure the stability of the overall structure and have good high temperature resistance, high flame retardancy, and high insulation properties.

[0048] The energy storage tripping mechanism 300 is mounted on the fixed frame 200. The energy storage tripping mechanism 300 includes a spring 310, a slider 320, and an elastic element 330. One end of the spring 310 is electrically connected to the first electrode 40 through a temperature-sensitive alloy, and the end of the spring 310 away from the temperature-sensitive alloy extends to form a second pin 340.

[0049] Preferably, the reed 310 can also be made of a material with high elasticity and high electrical performance, such as beryllium copper alloy. Of course, it is understood that the reed 310 and the second pin 340 can be integrated or separate designs, both of which are within the scope of protection of this application.

[0050] The slider 320 is movably mounted on the fixed frame 200 and can move and switch between the normal operating position and the tripped position. The two ends of the elastic element 330 of the slider 320 are respectively connected to the slider 320 and the fixed frame 200.

[0051] In practice, the spring 310 can be welded to the first electrode 40 using a temperature-sensitive alloy to achieve electrical connection between the energy storage tripping mechanism 300 and the discharge module 100. The melting temperature of the temperature-sensitive alloy is set to the critical temperature at which the surge protector fails, for example, 150~230℃. At this time, the spring 310 accumulates elastic potential energy and restricts the slider 320 to the normal operating position.

[0052] When an overvoltage occurs, surge energy is conducted through elastic electrode 22 to capacitor 31, charging capacitor 31 first. During the rapid energy storage process of capacitor 31, the voltage across its terminals increases synchronously with the surge voltage. When the voltage exceeds the gap breakdown threshold, the gap between adjacent graphite electrodes 10 rapidly breaks down, generating heat, causing the temperature-sensing alloy to melt and lose its locking effect on spring 310, releasing spring 310 and slider 320. Slider 320, no longer restricted, moves from the normal operating position to the tripped position under the elastic potential energy of elastic element 330, disconnecting the surge protector from external circuits and preventing overcurrent in downstream equipment or overheating and fire of the surge protector itself.

[0053] By switching the slider 320 between the normal operating position and the tripping position, the surge protector is forcibly disconnected from the external circuit. This reduces the elasticity requirements of the spring 310 and the precision requirements between the parts, effectively reducing production costs.

[0054] The electronic alarm mechanism 400 is mounted on the fixed frame 200 and is linked with the energy storage tripping mechanism 300. In specific implementation, the electronic alarm mechanism 400 includes a second PCB 410 and a first trigger spring 420, a second trigger spring 430, and a remote signaling pin 440 mounted on the second PCB 410. The first trigger spring 420 and the second trigger spring 430 are electrically connected to the remote signaling pin 440 via the second PCB 410. Using a PCB design reduces installation space.

[0055] Specifically, the slider 320 has an isolation part 321 and a pressing part 322 on its lower side. The isolation part 321 is located between the first trigger spring 420 and the second trigger spring 430, and the pressing part 322 is located above the first trigger spring 420 and the second trigger spring 430. When the slider 320 is in the normal operating position, the pressing part 322 can force the first trigger spring 420 and the second trigger spring 430 to press against each other and connect electrically. When the slider 320 is in the tripped position, the isolation part 321 and the pressing part 322 move, the first trigger spring 420 and the second trigger spring 430 are separated by the isolation part 321, the first trigger spring 420 and the second trigger spring 430 are released from the pressure of the pressing part 322, so that the first trigger spring 420 and the second trigger spring 430 are completely separated, and an alarm signal is output.

[0056] In a preferred embodiment, the surge protector further includes a housing 500. A fixing frame 200 is disposed within the housing 500. The housing 500 has an indicator window 510, the indication state of which can be changed by moving a slider 320. Specifically, the slider 320 can be made of a material with high temperature resistance, high flame retardancy, and high insulation, such as PA66 + glass fiber, and pigments can be added during the manufacturing process, or different colored inks can be printed on the surface of the slider 320 to indicate different states. When the slider 320 moves and switches between the normal operating position and the tripped position, the different colors displayed at the indicator window 510 can be changed to achieve status indication.

[0057] In summary, by bending both ends of the contact portion away from the graphite multi-gap structure to form an oblique support portion, the oblique support portion abuts against the electrode frame to support the contact portion so that it protrudes from the electrode frame towards the graphite multi-gap structure, ensuring stable contact between the contact portion and the graphite multi-gap structure, achieving conductivity. Furthermore, the oblique support portion can accumulate elastic potential energy to ensure complete contact between the contact portion and the graphite multi-gap structure, avoiding failure caused by poor contact.

[0058] Although this document uses terms such as electrode frame and elastic electrode frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0059] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this utility model can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A discharge module, characterized in that: include Graphite electrode; A trigger electrode structure is located on both sides of the graphite electrode, and the trigger electrode structure includes an electrode frame and an elastic electrode disposed on the electrode frame; The elastic electrode includes a contact portion, the two ends of which are bent toward the electrode frame to form a support portion. The support portion abuts against the electrode frame so that the contact portion protrudes from the electrode frame toward the graphite electrode, and the contact portion is electrically connected to the graphite electrode.

2. The electrical discharge module of claim 1, wherein: The two highest points of the support portions are at the same height from the upper surface of the electrode frame.

3. The electrical discharge module of claim 1, wherein: The electrode frame is provided with an electrode groove, and the electrode groove is provided with a protrusion. Through holes are opened from the inside to the outside of both sides of the protrusion. A first limiting part and a second limiting part are formed at the non-empty positions corresponding to the through holes. The first limiting part, the second limiting part and the through holes form a deformation groove.

4. The discharge module according to claim 3, characterized in that: The elastic electrode is located in the electrode groove. Both ends of the elastic electrode pass through the deformation groove and abut against the first limiting part and the second limiting part, respectively. The contact part is suspended above the protrusion by the support part. The end of one of the support parts extends and bends through the deformation groove and abuts against the first limiting part to form a first end. The end of the other support part extends into the deformation groove to form a deformation part and continues to extend and bend outward from the electrode frame to form a second end. The second end abuts against the second limiting part.

5. The discharge module according to any one of claims 1-4, characterized in that: The included angle α between the support portion and the contact portion is an obtuse angle; the length of the contact portion is not less than one-third of the total length of the graphite electrode contact surface.

6. The discharge module according to claim 3, characterized in that: The graphite electrodes are multiple in number, and an insulating pad is provided between two adjacent graphite electrodes to form a graphite multi-gap structure; the number of elastic electrodes matches the number of graphite electrodes.

7. The electrical discharge module of claim 6, wherein: The discharge module further includes a first PCB, which is disposed on the graphite multi-gap structure. The second end of the elastic electrode passes through the first PCB and is electrically connected to the first PCB. A capacitor is provided on the first PCB.

8. A surge protector, characterized in that: The surge protector further comprises: a discharge module as described in any one of claims 1-7 A fixed frame, on which the discharge module is mounted; A temperature-sensitive alloy, wherein the temperature-sensitive alloy is electrically connected to the first electrode; An energy storage tripping mechanism is mounted on the fixed frame and is electrically connected to the temperature-sensing alloy. The electronic alarm mechanism includes two conductive springs mounted on the fixed frame. The energy storage tripping mechanism can compress the two conductive springs to achieve electrical connection.

9. The surge protector of claim 8, wherein: The energy storage tripping mechanism includes a spring, a slider, and an elastic element. One end of the spring is electrically connected to the first electrode through the temperature-sensitive alloy. The end of the spring away from the temperature-sensitive alloy extends to form a second pin. The slider is movably mounted on the fixed frame and can move and switch between the normal working position and the tripping position. The two ends of the elastic element are respectively connected to the slider and the fixed frame.

10. The surge protector of claim 9, wherein: The electronic alarm mechanism includes a second PCB, and the two conductive springs are a first trigger spring and a second trigger spring. The first trigger spring, the second trigger spring, and the remote signaling pin are disposed on the second PCB. The first trigger spring and the second trigger spring are electrically connected to the remote signaling pin through the second PCB. The slider has an isolation part and a pressing part. The isolation part is placed between the first trigger spring and the second trigger spring, and the pressing part can squeeze the first trigger spring and the second trigger spring into contact. When the slider is in the normal working position, the pressing part squeezes the first trigger spring and the second trigger spring to press each other to form an electrical connection. When the slider is in the tripped position, the first trigger spring and the second trigger spring are separated by the isolation part.

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