CN218159856U

CN218159856U - High-voltage-resistant power type heat dissipation resistor

Info

Publication number: CN218159856U
Application number: CN202221987991.3U
Authority: CN
Inventors: 郭幸世; 黎焕章; 周广胜
Original assignee: Xingya Suzhou Electronic Industry Co ltd
Current assignee: Xingya Suzhou Electronic Industry Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-27
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a high voltage resistant power type heat dissipation resistor, including metal casing, set up in insulating casing in the metal casing, parallelly connected set up in a plurality of resistances in the insulating casing and be used for with metal casing connects with right the insulating casing with resistance carries out the metal covering of encapsulation, metal casing has first diapire, the insulating casing have with the corresponding second diapire of first diapire, resistance with be equipped with the heat dissipation layer between the second diapire. The utility model discloses a but high voltage resistant power type heat dissipation resistor high pressure resistant impact, heat dispersion are good.

Description

High-voltage-resistant power type heat dissipation resistor

Technical Field

The utility model relates to a resistance components and parts technical field, specific is a high pressure resistant power type heat dissipation resistor.

Background

The resistor is widely used as an important voltage dividing and current dividing element in a circuit. With the rapid development of the industry, the power requirements of some device circuits on resistors are higher and higher. For example, in a mechanical system for controlling a motor to stop quickly, a high-power resistor is usually used to help the motor convert regenerative electric energy generated by the motor due to the quick stop into heat energy, or the high-power resistor is used to charge and discharge a capacitor of a device to ensure smooth operation of the device.

In the working process of the high-power resistor, due to the fact that the high-power resistor is often subjected to large voltage impact and large generated heat, the high-power resistor is prone to bursting due to the factors, and when the resistor bursts, fragments of the resistor splash or other components in a circuit are adversely affected. For this reason, those skilled in the art are continuously seeking a resistor having high voltage impact resistance and good heat dissipation performance.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a high voltage resistant power type heat dissipation resistor, it can be high voltage resistant impact, heat dispersion is good.

The embodiment of the application discloses: the utility model provides a high voltage resistant power type heat dissipation resistor, include metal casing, set up in insulating casing in the metal casing, parallelly connected set up in a plurality of resistances in the insulating casing and be used for with the metal casing connect with right the insulating casing with the metal lid that the resistance was capsulated, the metal casing has first diapire, the insulating casing have with the corresponding second diapire of first diapire, resistance with be equipped with the heat dissipation layer between the second diapire.

Specifically, the metal shell comprises a plurality of side walls connected to the first bottom wall, and a threaded hole used for being connected with the metal cover is formed in one end, away from the first bottom wall, of each side wall.

Specifically, a plurality of heat dissipation holes are formed in the metal cover.

Specifically, the insulating shell is filled with cement slurry.

Specifically, resistance includes the resistance main part, set up in two metal caps at resistance main part both ends and with the sheetmetal that the metal cap is connected, the sheetmetal at resistance both ends is connected with a current conducting plate respectively, be equipped with on the current conducting plate and run through the metal lid in order to extend to the outer pin piece of metal casing.

Specifically, the metal piece of the resistor and the conductive plate are connected by a bolt and a nut.

Specifically, the lead sheet is bent.

Specifically, a plurality of heat dissipation grooves are formed in the side wall of the metal shell.

The utility model discloses following beneficial effect has at least:

1. the plurality of resistors of the embodiment are arranged in the insulating shell in parallel, the overall power of the high-voltage-resistant power type radiating resistor can be improved, the power of the resistor can reach 700W at most, the insulating shell can improve the high-voltage impact resistance of the resistors, the metal shell and the metal cover are arranged outside the insulating shell, the radiating rate of the resistors can be improved through the metal shell and the metal cover, the risk of cracking of the resistors due to high heat is reduced, even if the resistors burst, the metal shell and the metal cover have good ductility, the metal shell and the metal cover cannot be smashed by the resistors, the full-metal shell formed by the metal shell and the metal cover can keep the fragments of the resistors burst in the first inner cavity, and the splashing of the resistor fragments is avoided.

2. The resistor is arranged in the second inner cavity, and the second bottom wall of the insulating shell is provided with a heat dissipation layer.

3. The connection strength between the resistor and the conductive plate is high.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a high-voltage power-tolerant heat dissipation resistor according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a high voltage power resistant heat dissipation resistor according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a high voltage tolerant power type heat dissipating resistor in an embodiment of the present invention;

fig. 4 is a schematic diagram of the filling of the insulating shell with cement paste in the embodiment of the present invention.

Reference numerals of the above figures: 1. a metal housing; 11. a first bottom wall; 12. a side wall; 121. a threaded hole; 122. a heat sink; 2. an insulating case; 21. a second bottom wall; 3. a resistance; 31. a resistor body; 32. a metal cap; 33. a metal sheet; 4. a metal cover; 5. a conductive plate; 6. a lead sheet; 71. a bolt; 72. and a nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the high voltage power resistant heat dissipation resistor of the present embodiment includes: metal casing 1, insulating casing 2, a plurality of resistances 3 and metal lid 4. The metal shell 1 has a first inner cavity, and the insulating shell 2 is disposed in the first inner cavity of the metal shell 1. The insulating shell 2 is provided with a second inner cavity, and a plurality of resistors 3 are arranged in parallel in the insulating shell 2. The metal cover 4 is used for connecting the metal shell 1 to encapsulate the insulating shell 2 in the first inner cavity and the plurality of resistors 3 in the second inner cavity. The first inner cavity of the metal shell 1 is enclosed by a first bottom wall 11 and a plurality of side walls 12 arranged on the first bottom wall 11, the insulating shell 2 has a second bottom wall 21 corresponding to the first bottom wall 11 of the metal shell 1, and a heat dissipation layer is arranged between the plurality of resistors 3 and the second bottom wall 21 of the insulating shell 2, that is, when the plurality of resistors 3 are arranged in the second inner cavity of the insulating shell 2, the resistors 3 are not in contact with the second bottom wall 21 of the insulating shell 2, and can be arranged on the heat dissipation layer therebetween, and the heat dissipation layer can be formed by cement paste or other heat dissipation materials. The metal shell 1 and the metal cover 4 can be made of aluminum. The resistor 3 may be a wire-wound resistor or a film resistor.

By adopting the structure, the high-voltage-resistant power type heat dissipation resistor has the following advantages:

1. the plurality of resistors 3 of the embodiment are arranged in the insulating shell 2 in parallel, the overall power of the high-voltage-resistant power type heat dissipation resistor can be improved, the power of the resistor can reach 700W at most, the insulating shell 2 can improve the high-voltage impact resistance of the resistor 3, the metal shell 1 and the metal cover 4 are arranged outside the insulating shell 2, the heat dissipation rate of the resistor 3 can be improved by the metal shell 1 and the metal cover 4, the risk that the resistor 3 bursts due to high heat is reduced, even if the resistor 3 bursts under extreme conditions, the metal shell 1 and the metal cover 4 have good ductility and cannot be broken by the resistor 3, the broken fragments of the resistor 3 can be kept in the first inner cavity by the full-metal shell formed by the metal shell 1 and the metal cover 4, and the splashing of the broken fragments of the resistor 3 is avoided.

2. The resistor 3 is substantially centered in the second inner cavity by providing a heat dissipation layer between the resistor 3 and the second bottom wall 21 of the insulating housing 2, which further improves the heat dissipation efficiency of the resistor 3.

As shown in fig. 2, in the metal shell 1 of the present embodiment, one end of the side wall 12 away from the first bottom wall 11 is provided with a threaded hole 121 for connecting with the metal cover 4, and correspondingly, the metal cover 4 is provided with a plurality of through holes corresponding to the plurality of threaded holes 121 one to one.

As shown in fig. 1, in order to further improve the overall heat dissipation efficiency of the high voltage resistant power heat dissipation resistor, the metal cover 4 of the present embodiment may further have a plurality of heat dissipation holes.

As shown in fig. 4, in order to further improve the heat dissipation efficiency, the impact resistance, and the insulation performance of the resistor 3, before the metal cover 4 is used to encapsulate the first inner cavity of the metal shell 1, the second inner cavity of the insulation shell 2 is filled with cement slurry. If the cement paste bursts at high temperature, the metal shell 1 and the metal cover 4 can also keep the cement paste fragments, and the cement paste fragments are prevented from splashing.

As shown in fig. 2 and fig. 3, the resistor 3 of the present embodiment includes a resistor main body 31, two metal caps 32 are respectively disposed at two ends of the resistor main body 31, and each metal cap 32 is connected to one metal sheet 33. The same end metal piece 33 of the plurality of resistors 3 is connected to the same conductive plate 5, and the metal piece 33 of the other end common to the plurality of resistors 3 is connected to the other conductive plate 5. Two conductive plates 5 are respectively provided with a pin sheet 6 which penetrates through the metal cover 4 to extend out of the first inner cavity of the metal shell 1, and the two pin sheets 6 are used for being connected with other components such as a circuit board and the like. Preferably, the metal sheet 33 of the resistor 3 is connected with the conductive plate 5 through the bolt 71 and the nut 72, so that the connection strength of the metal sheet 33 and the conductive plate 5 can be improved, and the connection failure of the metal sheet 33 and the conductive plate 5 in a high-temperature environment is avoided; the lead pieces 6 are bent, which is beneficial to improving the strength of the lead pieces 6.

As shown in fig. 1, the plurality of heat dissipation grooves 122 are formed in the side wall 12 of the metal case 1, so that the heat dissipation area of the metal case 1 can be increased, and the heat dissipation efficiency of the resistor 3 can be improved.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be changes in the specific embodiments and the application range, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a high voltage resistant power type heat dissipation resistor, its characterized in that, including metal casing, set up in insulating casing in the metal casing, parallelly connected set up in a plurality of resistances in the insulating casing and be used for with the metal casing connect with right the insulating casing with the metal lid that the resistance capsulated, the metal casing has first diapire, the insulating casing have with the corresponding second diapire of first diapire, resistance with be equipped with the heat dissipation layer between the second diapire.

2. The high voltage power type heat dissipating resistor as claimed in claim 1, wherein the metal case includes a plurality of side walls connected to the first bottom wall, and an end of each side wall remote from the first bottom wall is provided with a threaded hole for connection with the metal cover.

3. The high voltage power tolerant heat dissipating resistor of claim 1, wherein the metal cap has a plurality of heat dissipating holes formed therein.

4. The high voltage power tolerant heat dissipating resistor of claim 1, wherein the insulating casing is potted with a cement paste.

5. The high voltage power resistant heat dissipating resistor as claimed in claim 1, wherein the resistor comprises a resistor body, two metal caps disposed at two ends of the resistor body, and metal sheets connected to the metal caps, the metal sheets at two ends of the resistor are respectively connected to a conductive plate, and the conductive plate is provided with pin sheets penetrating through the metal caps to extend out of the metal housing.

6. The high voltage power tolerant heat dissipating resistor as claimed in claim 5, wherein the metal sheet of the resistor is connected to the conductive plate by a bolt and a nut.

7. The high voltage power resistant heat dissipating resistor of claim 5, wherein the lead sheet is bent.

8. The high voltage tolerant power dissipating heat resistor as claimed in claim 2, wherein the side wall of the metal casing is provided with a plurality of heat dissipating grooves.