TVS overvoltage protection device

Abstract

The utility model discloses a TVS (Transient Voltage Suppressor) overvoltage protection device, which belongs to the technical field of diodes and comprises a packaging upper cover and a packaging bottom cover which are arranged outside a TVS tube, the packaging upper cover and the packaging bottom cover are mutually plugged and then sealed by glue, a through mounting groove is arranged at the bottom of the packaging bottom cover, and the TVS tube is arranged in the through mounting groove. A second heat conduction copper plate is installed in the penetrating installation groove, the upper end of the second heat conduction copper plate is attached to the bottom of the TVS tube, the bottom of the second heat conduction copper plate is fixedly connected with second heat dissipation fins penetrating through the penetrating installation groove, a heat dissipation assembly is installed in the packaging upper cover, and an adjusting assembly is installed on the heat dissipation assembly. The adjusting assembly adjusts the height of the heat dissipation assembly, heat is transmitted to the first heat conduction copper plate through heat conduction silicone grease arranged in the heat dissipation assembly, the heat is transmitted to the first heat dissipation fins through the multiple heat conduction copper pipes, the heat is diffused outwards through the first heat dissipation fins, and therefore sufficient heat dissipation can be conducted on the TVS tube.

Description

Technical Field

[0001] The utility model belongs to the technical field of diodes, and specifically relates to a TVS overvoltage protection device. Background Technique

[0002] The TVS overvoltage protection device is also called a transient suppression diode. As an effective protection device, it effectively suppresses transient interference. The TVS is a diode with special functions made of silicon semiconductor materials. When the two ends of the TVS tube are subjected to an instantaneous high-energy impact, it can quickly turn on, absorb the surge current at the same time, and clamp the voltage between its two ends at a predetermined value, thereby ensuring that the subsequent precision electronic components are not damaged by the transient high-energy impact.

[0003] At present, in the prior art, Chinese utility model patent CN220963325U discloses a TVS overvoltage protection device, including a packaging shell. A sunken groove is provided at the inner bottom of the packaging shell, and a copper block is embedded at the inner bottom of the sunken groove. A copper heat sink is attached to the copper block. Both ends of the copper heat sink extend out of the packaging shell, and both ends of the copper heat sink are bent to the top of the packaging shell. For this TVS overvoltage protection device, using the lead frame as the heat transfer path, part of the heat generated by the chip when the TVS tube works is conducted through the copper heat sink at the bottom of the lead frame. The copper heat sink makes full use of the large heat capacity and surface area, and dissipates the absorbed heat into the external air through various heat exchange paths on the surface. Another part of the heat is conducted to the copper block at the bottom through the copper heat sink for auxiliary heat dissipation, effectively improving the heat dissipation efficiency, reducing the temperature of the working environment of the TVS tube, and increasing the service life.

[0004] Although the above-mentioned prior art can dissipate heat when the TVS tube works, it can only dissipate heat from the bottom of the TCS tube, which will result in poor heat dissipation effect, and the heat dissipation component cannot be adjusted according to the height of the TCS tube, and the application range is not wide enough. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] In order to solve the problems raised in the above background technique that only the bottom of the TCS tube can be cooled, which will result in poor heat dissipation effect, the heat dissipation component cannot be adjusted according to the height of the TCS tube, and the application range is not wide enough, the utility model adopts the following technical solutions.

[0007] A TVS overvoltage protection device includes a packaging upper cover and a packaging bottom cover installed outside the TVS tube. After the packaging upper cover and the packaging bottom cover are inserted into each other, they are sealed with glue. A through mounting groove is provided at the bottom of the packaging bottom cover, and a second heat-conducting copper plate is installed inside the through mounting groove. The upper end of the second heat-conducting copper plate is attached to the bottom of the TVS tube, and the bottom of the second heat-conducting copper plate is fixedly connected to a second heat dissipation fin passing through the through mounting groove. A heat dissipation component is installed inside the packaging upper cover, and an adjustment component is installed on the heat dissipation component. The adjustment component adjusts the height of the heat dissipation component.

[0008] Preferably, a limiting flange is fixedly connected to the inner wall of the packaging bottom cover near the bottom. The second heat-conducting copper plate is placed above the limiting flange, and heat-conducting silicone grease is applied between the second heat-conducting copper plate and the bottom of the TVS tube.

[0009] Preferably, insertion cylinders are fixedly connected to both sides of the inner top of the packaging upper cover, and insertion positioning columns are fixedly connected to both sides of the upper end of the packaging bottom cover. The TVS tube is installed at the upper end of the packaging bottom cover, and the insertion positioning columns are inserted into the inside of the insertion cylinders.

[0010] Preferably, the heat dissipation component includes a heat-conducting copper tube, a first heat-conducting copper plate, and a first heat dissipation fin. A plurality of heat-conducting copper tubes are provided on the inner wall of the packaging upper cover. The outer walls of the plurality of heat-conducting copper tubes near the bottom are fixedly connected to a first heat-conducting copper plate, and the first heat-conducting copper plate contacts the upper end of the TVS tube. Both ends of each heat-conducting copper tube pass through the outer wall of the packaging upper cover, and both ends of the plurality of heat-conducting copper tubes are fixedly connected to a first heat dissipation fin.

[0011] Preferably, heat-conducting silicone grease is applied between the first heat-conducting copper plate and the TVS tube.

[0012] Preferably, the adjustment component includes a through groove, a sliding groove, and a sliding plate. A plurality of through grooves are provided on both sides of the packaging upper cover. Sliding grooves are provided on both the upper and lower sides inside each through groove, and a sliding plate is slidably connected inside each sliding groove. Both ends of each heat-conducting copper tube pass through the sliding plates on both sides.

[0013] Preferably, inner grooves passing through the pins of the TVS tube are provided on both sides of the upper end of the packaging bottom cover.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The heat-conducting silicone grease in the heat dissipation component transfers heat to the first heat-conducting copper plate, and then transfers the heat to the first heat dissipation fin through a plurality of heat-conducting copper tubes. The heat is diffused outward through the first heat dissipation fin, so that the TVS tube can be fully dissipated.

[0016] 2. By sliding the sliding plate in the adjustment component in the sliding groove, when the encapsulation upper cover is buckled above the encapsulation bottom cover, the first heat-conducting copper plate and the heat-conducting copper tube move upward in the sliding groove through the sliding plate, so that the first heat-conducting copper plate can always be kept in contact with the TVS, making the installation more convenient, with better heat dissipation effect. Moreover, the height of the heat-conducting copper tube and the first heat-conducting copper plate can be adjusted according to the actual situation. And due to the setting of the sliding plate, glue will not leak out during glue encapsulation, and the positions of the heat-conducting copper tube and the first heat-conducting copper plate can be fixed through glue encapsulation.

[0017] 3. The heat generated is diffused outward through the second heat-conducting copper plate by the second heat-dissipating fins, so that the heat at the bottom of the TVS can be dissipated, and the heat dissipation effect can be better in cooperation with the heat-dissipating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a TVS overvoltage protection device in the present invention;

[0019] Figure 2 is a schematic structural diagram of the installation of the encapsulation upper cover and the encapsulation bottom cover in the present invention;

[0020] Figure 3 is a schematic structural diagram of the installation of the heat-conducting copper tube and the first heat-conducting copper plate in the present invention;

[0021] Figure 4 In the present invention Figure 3 is an enlarged structural diagram at position A;

[0022] Figure 5 is a schematic structural diagram of the second heat-conducting copper plate in the present invention.

[0023] The corresponding relationship between the labels in the drawings and the component names is as follows:

[0024] 100. Encapsulation upper cover; 101. Insertion cylinder; 102. Sliding plate; 103. Heat-conducting copper tube; 104. First heat-conducting copper plate; 105. First heat-dissipating fin; 106. Through groove; 107. Sliding groove;

[0025] 200. Encapsulation bottom cover; 201. Through installation groove; 202. Insertion positioning post; 203. Second heat-conducting copper plate; 204. Second heat-dissipating fin; 205. Inner groove; 206. Limiting flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings of the specification.

[0027] In the following description, numerous specific details are set forth to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0028] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments. The present utility model provides the following embodiments.

[0029] As Figure 1 shown, it is a schematic structural diagram of a TVS overvoltage protection device according to a preferred embodiment of the present utility model. The TVS overvoltage protection device of this embodiment includes a packaging upper cover 100 and a packaging bottom cover 200 installed outside the TVS tube. After the packaging upper cover 100 and the packaging bottom cover 200 are inserted into each other, they are sealed with glue. In this embodiment, the TVS tube is encapsulated inside the packaging upper cover 100 and the packaging bottom cover 200 through the cooperation of the packaging upper cover 100, the packaging bottom cover 200, and the glue.

[0030] As Figure 2 shown, it is a schematic structural diagram of the installation of the packaging upper cover and the packaging bottom cover in this embodiment. On both sides of the inner top of the packaging upper cover 100, there are fixedly connected insertion cylinders 101. On both sides of the upper end of the packaging bottom cover 200, there are fixedly connected insertion positioning columns 202. The TVS tube is installed on the upper end of the packaging bottom cover 200, and the insertion positioning columns 202 are inserted into the inside of the insertion cylinders 101. In this embodiment, the two-sided insertion positioning columns 202 can assist in positioning the TVS tube, and the insertion of the insertion positioning columns 202 and the insertion cylinders 101 can limit the packaging upper cover 100 and the packaging bottom cover 200, enabling better cooperation with the glue for encapsulation.

[0031] As Figure 3 and Figure 4 shown, it is a schematic structural diagram of the installation of the heat-conducting copper tube and the first heat-conducting copper plate in this embodiment and Figure 3Schematic diagram of the enlarged structure at position A in the figure. A plurality of heat-conducting copper tubes 103 are provided on the inner wall of the encapsulation upper cover 100. A first heat-conducting copper plate 104 is fixedly connected to the outer wall of the plurality of heat-conducting copper tubes 103 near the bottom. The first heat-conducting copper plate 104 contacts the upper end of the TVS tube. Thermal grease is applied between the first heat-conducting copper plate 104 and the TVS tube. Both ends of each heat-conducting copper tube 103 penetrate through the outer wall of the encapsulation upper cover 100. First heat-dissipating fins 105 are fixedly connected to both ends of the plurality of heat-conducting copper tubes 103. In this embodiment, heat is transferred to the first heat-conducting copper plate 104 through the thermal grease, and then the heat is transferred to the first heat-dissipating fins 105 through the plurality of heat-conducting copper tubes 103. The heat is diffused outward through the first heat-dissipating fins 105, so that the TVS tube can be fully cooled.

[0032] It should be noted that the above-mentioned heat-conducting copper tubes 103, first heat-conducting copper plates 104 and first heat-dissipating fins 105 are heat-dissipating components in this embodiment. The heat-dissipating components include but are not limited to heat-conducting copper tubes 103, first heat-conducting copper plates 104 and first heat-dissipating fins 105. As long as the components that can diffuse the heat of the TVS tube outward can be applied to this embodiment.

[0033] As Figure 3 and Figure 4 shown, in order to be able to adjust the heights of the first heat-conducting copper plate 104 and the heat-conducting copper tube 103 according to the internally installed TVS tube so that they can fit the upper end of the TVS tube. In this embodiment, a plurality of through grooves 106 are provided on both sides of the encapsulation upper cover 100. Sliding grooves 107 are provided on both the upper and lower sides inside each through groove 106. A sliding plate 102 is slidably connected inside each sliding groove 107. Both ends of each heat-conducting copper tube 103 pass through the sliding plates 102 on both sides. In this embodiment, by sliding the sliding plate 102 inside the sliding groove 107, when the encapsulation upper cover 100 is buckled above the encapsulation bottom cover 200, the first heat-conducting copper plate 104 and the heat-conducting copper tube 103 move upward inside the sliding groove 107 through the sliding plate 102, so that the first heat-conducting copper plate 104 can always fit the TVS, making the installation more convenient, having a better heat-dissipating effect, and being able to adjust the heights of the heat-conducting copper tube 103 and the first heat-conducting copper plate 104 according to the actual situation. And through the setting of the sliding plate 102, it will not leak out when encapsulated with glue. The positions of the heat-conducting copper tube 103 and the first heat-conducting copper plate 104 can be fixed through the glue encapsulation.

[0034] It should be noted that the above-mentioned through grooves 106, sliding grooves 107 and sliding plates 102 are adjustment components in this embodiment. The adjustment components include but are not limited to through grooves 106, sliding grooves 107 and sliding plates 102. As long as the components that can make the heat-conducting copper tubes 103, first heat-conducting copper plates 104 and first heat-dissipating fins 105 move upward or downward can be applied to this embodiment.

[0035] As Figure 2 Shown in FIGS. 4 and 5, these are the schematic diagrams of the mounting structure of the encapsulation upper cover and the encapsulation bottom cover and the schematic diagram of the second heat-conducting copper plate in this embodiment. Inner grooves 205 for passing through the pins of the TVS tube are provided on both sides of the upper end of the encapsulation bottom cover 200. A through mounting groove 201 is provided at the bottom of the encapsulation bottom cover 200. A limiting flange 206 is fixedly connected to the inner wall of the encapsulation bottom cover 200 near the bottom. Above the limiting flange 206, there is a second heat-conducting copper plate 203. The upper end of the second heat-conducting copper plate 203 is in contact with the bottom of the TVS tube. A second heat-dissipating fin 204 passing through the through mounting groove 201 is fixedly connected to the bottom of the second heat-conducting copper plate 203. Thermal grease is applied between the upper end of the second heat-conducting copper plate 203 and the bottom of the TVS tube. In this embodiment, the heat is diffused outward through the second heat-dissipating fin 204 by the second heat-conducting copper plate 203, so that the heat at the bottom of the TVS can be dissipated, and the heat dissipation effect can be better in cooperation with the heat dissipation component.

[0036] The above content further elaborates on the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope determined by the claims submitted for the present utility model.

Claims

1. A TVS overvoltage protection device, comprising a packaging upper cover (100) and a packaging bottom cover (200) installed outside the TVS tube. The packaging upper cover (100) and the packaging bottom cover (200) are inserted into each other and sealed with glue. It is characterized in that, The bottom of the encapsulation bottom cover (200) is provided with a through mounting groove (201). A second heat-conducting copper plate (203) is installed inside the through mounting groove (201). The upper end of the second heat-conducting copper plate (203) is in contact with the bottom of the TVS tube. The bottom of the second heat-conducting copper plate (203) is fixedly connected to a second heat dissipation fin (204) passing through the through mounting groove (201). A heat dissipation component is installed inside the encapsulation upper cover (100), and an adjustment component is installed on the heat dissipation component. The adjustment component adjusts the height of the heat dissipation component.

2. The TVS overvoltage protection device according to claim 1, characterized in that, The inner wall of the encapsulation bottom cover (200) near the bottom is fixedly connected with a limiting flange (206). The second heat-conducting copper plate (203) is placed above the limiting flange (206), and heat-conducting silicone grease is applied between the second heat-conducting copper plate (203) and the bottom of the TVS tube.

3. The TVS overvoltage protection device according to claim 2, characterized in that, On both sides of the inner top of the encapsulation upper cover (100), there are fixedly connected plug-in cylinders (101). On both sides of the upper end of the encapsulation bottom cover (200), there are fixedly connected plug-in positioning columns (202). The TVS tube is installed at the upper end of the encapsulation bottom cover (200), and the plug-in positioning columns (202) are inserted into the inside of the plug-in cylinders (101).

4. The TVS overvoltage protection device according to claim 3, characterized in that, The heat dissipation component includes heat-conducting copper tubes (103), a first heat-conducting copper plate (104), and first heat dissipation fins (105). A plurality of heat-conducting copper tubes (103) are provided on the inner wall of the encapsulation upper cover (100). The outer walls of the plurality of heat-conducting copper tubes (103) near the bottom are fixedly connected with a first heat-conducting copper plate (104). The first heat-conducting copper plate (104) contacts the upper end of the TVS tube. Both ends of each heat-conducting copper tube (103) pass through the outer wall of the encapsulation upper cover (100), and both ends of the plurality of heat-conducting copper tubes (103) are fixedly connected with first heat dissipation fins (105).

5. The TVS overvoltage protection device according to claim 4, characterized in that, Heat-conducting silicone grease is applied between the first heat-conducting copper plate (104) and the TVS tube.

6. The TVS overvoltage protection device according to claim 5, characterized in that, The adjustment component includes a through groove (106), a sliding groove (107), and a sliding plate (102). On both sides of the encapsulation upper cover (100), there are provided a plurality of through grooves (106). On the upper and lower sides of the inside of each through groove (106), there are provided sliding grooves (107). A sliding plate (102) is slidably connected inside each sliding groove (107). Both ends of each heat-conducting copper tube (103) pass through the sliding plates (102) on both sides.

7. The TVS overvoltage protection device according to claim 6, wherein, On both sides of the upper end of the encapsulation bottom cover (200), there are provided inner grooves (205) for passing through the pins of the TVS tube.

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