Heat dissipation structure for mutual inductor
By introducing a heat dissipation device and microsphere expansion wax into the current transformer, the problem of insufficient adaptability of the traditional current transformer heat dissipation structure is solved, and automatic adjustment and enhanced heat dissipation effect under temperature changes are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU HECHANG POWER TECH CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-05-01
AI Technical Summary
The heat dissipation structure of traditional current transformers cannot adapt to temperature changes in different environments, resulting in poor heat dissipation.
A current transformer structure including a heat dissipation device was designed. The structure utilizes the expansion and contraction of microsphere wax when the temperature changes. The wax is connected to the current transformer body through a spring connector to realize the expansion and contraction adjustment of the heat dissipation plate and enhance the heat dissipation effect.
It enables automatic adjustment of heat dissipation based on temperature changes, improving the heat dissipation efficiency and stability of the current transformer in different environments.
Smart Images
Figure CN224190779U_ABST
Abstract
Description
A heat dissipation structure for a current transformer Technical Field
[0001] This utility model relates to the field of current transformer technology, specifically a heat dissipation structure for current transformers. Background Technology
[0002] A current transformer is a power measuring instrument mainly used to convert high current into standardized small current for monitoring, measurement, and protection purposes. It typically consists of an iron core and windings. The iron core is usually rectangular or ring-shaped, which can be used to enhance the current intensity. Its windings are connected in series or parallel with the circuit of the device under test, thereby realizing the measurement of current. Current transformers are widely used in various occasions in power systems, such as transmission lines, substations, and power plants. Current transformers generate heat when they are working, which leads to the development of a current transformer with a heat dissipation structure.
[0003] Traditional current transformers with integrated heat dissipation structures may be unable to adapt to different environments due to their relatively simple structure. Summary of the Invention
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a heat dissipation structure for current transformers, which solves the problems mentioned above.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a heat dissipation structure for a current transformer, comprising a current transformer body, a heat dissipation device, and a base. The bottom of the current transformer body is fixedly connected to the base. The heat dissipation device is embedded in the current transformer body and installed inside the upper end of the heat dissipation device. The heat dissipation device includes a top plate, a heat dissipation plate, and a spring connector. The upper end of the heat dissipation plate is fixedly connected to the top plate of the heat dissipation device. The top plate of the heat dissipation device is fixedly connected to the current transformer body through the spring connector.
[0008] Preferably, the heat sink includes a heat sink body, a heat sink base plate, and microsphere expanding wax. The bottom of the heat sink body and the heat sink base plate are fixedly connected. The lower end of the heat sink base plate is provided with microsphere expanding wax. The microsphere expanding wax melts and expands in volume to push the heat sink.
[0009] Preferably, the upper end of the transformer body is provided with grid-like slots and the inner wall is smooth, so that the heat dissipation device can move flexibly.
[0010] Preferably, a partition is installed on the upper end of the current transformer body. The partition is completely sealed, dividing the current transformer body into a cavity to prevent the liquefied microsphere expanding wax from flowing into the interior of other equipment.
[0011] Preferably, the microsphere expanding wax contains thermally expanding microspheres. When heated, the microspheres expand, increasing their overall volume. When the temperature rises, the spherical material expands due to thermal expansion, and when the temperature drops, it shrinks.
[0012] Preferably, the top plate of the heat dissipation device is fixedly connected to the edge of the grid-like slot of the transformer body through a spring connector, so that the device can be contracted and the stability of the device is increased.
[0013] (III) Beneficial Effects
[0014] This utility model provides a heat dissipation structure for a current transformer. It has the following advantages: by incorporating a heat dissipation device installed inside the upper part of the current transformer body, the microspheres in the heat dissipation device expand in volume after melting wax, thus adjusting the heat dissipation level and facilitating changes in heat dissipation intensity to accommodate different temperatures. Attached Figure Description
[0015] Figure 1 is a schematic diagram of the structure of this utility model;
[0016] Figure 2 is a schematic diagram of the planar structure of this utility model;
[0017] Figure 3 is a schematic diagram of the heat dissipation device in this utility model;
[0018] Figure 4 is a schematic diagram of the base structure in this utility model;
[0019] Figure 5 is a schematic diagram of the planar cross-sectional structure of the heat dissipation device in this utility model.
[0020] In the diagram: Current transformer body-1, heat dissipation device-2, base-3;
[0021] Grid-11, partition-12, heat dissipation device top plate-21, heat dissipation plate-22, spring connector-23, base hole diameter-31, screw-32;
[0022] Heat sink body - 221, heat sink base plate - 222, microsphere expansion wax - 223. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please refer to Figures 1-3. This utility model provides a heat dissipation structure technical solution for a current transformer: A heat dissipation structure for a current transformer includes a current transformer body 1, a heat dissipation device 2, and a base 3. The bottom of the current transformer body 1 and the base 3 are fixedly connected. The heat dissipation device 2 is embedded in the current transformer body 1 and installed inside the upper end of the heat dissipation device 2. The heat dissipation device 2 includes a heat dissipation device top plate 21, a heat dissipation plate 22, and a spring connector 23. The upper end of the heat dissipation plate 22 is fixedly connected to the heat dissipation device top plate 21. The heat dissipation device top plate 21 is fixedly connected to the current transformer body 1 through the spring connector 23.
[0025] Please refer to Figures 4 and 5. The heat sink 22 includes a heat sink body 221, a heat sink base plate 222, and microsphere expansion wax 223. The bottom of the heat sink body 221 and the heat sink base plate 222 are fixedly connected. The microsphere expansion wax 223 is placed at the lower end of the heat sink base plate 222. The microsphere expansion wax 223 is melted and expanded in volume to push the heat sink 22.
[0026] The upper end of the transformer body 1 is provided with grid-like slots 11 and the inner wall is smooth, so that the heat dissipation device 2 can move flexibly.
[0027] A partition plate 12 is installed on the upper end of the transformer body 1. The partition plate is completely sealed, dividing the transformer body 1 into two cavities to prevent the liquefied microsphere expansion wax 223 from flowing into other equipment.
[0028] The microsphere-expanding wax 223 contains thermally expandable microspheres. When heated, the microspheres expand, increasing their overall volume. As the temperature rises, the spherical material expands due to thermal expansion, and as the temperature decreases, it shrinks.
[0029] The top plate 21 of the heat dissipation device is fixedly connected to the edge of the grid-shaped slot 11 of the transformer body 1 through the spring connector 23, so that the equipment can be contracted and the stability of the equipment is increased.
[0030] During use, as the transformer body 1 operates, the temperature gradually rises, and the microspheres of wax 223 with different melting points melt due to the temperature and expand in volume.
[0031] The heat sink 22 is pushed by the heat sink 22 base plate 222. The heat sink 22 passes through the grid-like holes 11 and extends out of the transformer body 1. The shape of the heat sink 2 and the air contact surface follow the airflow to achieve the heat dissipation effect. The higher the temperature, the greater the distance at the heat sink 2.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A heat dissipation structure for a current transformer, comprising a current transformer body (1), a heat dissipation device (2), and a base (3), wherein the bottom of the current transformer body (1) and the base (3) are fixedly connected, and the heat dissipation device (2) is embedded in the current transformer body (1) and installed inside the upper end of the heat dissipation device (2); characterized in that, The heat dissipation device (2) includes a heat dissipation device top plate (21), a heat dissipation plate (22) and a spring connector (23). The upper end of the heat dissipation plate (22) is fixedly connected to the heat dissipation device top plate (21), and the heat dissipation device top plate (21) is fixedly connected to the transformer body (1) through the spring connector (23).
2. The heat dissipation structure for a current transformer according to claim 1, characterized in that: The heat sink (22) includes a heat sink body (221), a heat sink base plate (222), and microsphere expansion wax (223). The bottom of the heat sink body (221) and the heat sink base plate (222) are fixedly connected, and the microsphere expansion wax (223) is placed at the lower end of the heat sink base plate (222).
3. The heat dissipation structure for a current transformer according to claim 1, characterized in that: The upper end of the transformer body (1) is provided with a grid-shaped bar hole (11).
4. The heat dissipation structure for a current transformer according to claim 1, characterized in that: A partition (12) is installed on the upper end of the transformer body (1). The partition is completely sealed, dividing the transformer body (1) into two cavities.
5. A heat dissipation structure for a current transformer according to claim 2, characterized in that: The microsphere expanded wax (223) contains thermally expandable microspheres, which expand when heated, increasing the overall volume.
6. The heat dissipation structure for a current transformer according to claim 1, characterized in that: The top plate (21) of the heat dissipation device is fixedly connected to the edge of the grid-shaped slot (11) of the transformer body (1) through the spring connector (23).