Current transformer easy to dissipate heat
By setting up an annular and cylindrical outer shell to form a cooling cavity in the current transformer, and utilizing different cooling media, flow guides, and heat dissipation fins, the problem of insufficient heat dissipation performance of the current transformer is solved, achieving stable operation and efficient heat dissipation in different environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIAYANG ELECTRONIC TECHNOLOGY CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-05
AI Technical Summary
Existing current transformers have limited heat dissipation performance during use, which can easily lead to unstable operation and failure, especially in environments with unstable temperatures.
A current transformer with easy heat dissipation was designed. A closed cooling cavity was formed by setting an annular outer shell and a cylindrical outer shell at both ends of the transformer body. Different types of cooling media, such as antifreeze, cooling air and cooling water, were used to select the appropriate medium for cooling or heat preservation according to the ambient temperature. The heat dissipation efficiency was improved by combining annular guide strips and heat dissipation fins.
It achieves automatic adjustment of heat dissipation performance according to ambient temperature, ensuring stable operation of the current transformer in different environments, reducing energy consumption, and improving heat dissipation effect and operational stability.
Smart Images
Figure CN224203923U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current transformer technology, and in particular to a current transformer that is easy to dissipate heat. Background Technology
[0002] In existing technologies, current transformers tend to generate heat during actual use, and current current transformers rely on natural heat dissipation. This limits the heat dissipation performance of the transformers, especially in environments with unstable temperatures. Consequently, the heat dissipation performance of the transformers cannot adapt to the external environment, leading to unstable operation and susceptibility to failure.
[0003] Therefore, there is an urgent need to design a current transformer whose heat dissipation performance can be adaptively adjusted according to actual needs. Utility Model Content
[0004] To address the aforementioned technical shortcomings, this invention provides a current transformer with heat dissipation capabilities. It allows for the selection of appropriate cooling media based on actual conditions to modify the heat dissipation performance of the current transformer and adapt to different external environments.
[0005] This utility model discloses a current transformer with easy heat dissipation, including a transformer body, an annular outer shell disposed on the outer sidewalls of both ends of the transformer body, and a cylindrical outer shell disposed on the inner sidewall of the transformer body. There are gaps between the annular outer shell and the sidewalls of the transformer body, and there are gaps between the cylindrical outer shell and the inner sidewall of the transformer body. The annular outer shell and the cylindrical outer shell are connected as an integral structure. The outer edge of the annular outer shell extends towards the edge of the sidewall of the transformer body and is connected as an integral structure. The annular outer shell, the cylindrical outer shell and the transformer body form a closed cooling cavity. A cooling medium inlet pipe is disposed on one side of the annular outer shell, and a cooling medium outlet pipe is disposed on the other side of the annular outer shell. Both the cooling medium inlet pipe and the cooling medium outlet pipe are connected to the cooling cavity.
[0006] At least two layers of annular guide strips with different diameters are provided between the annular outer shell and the side wall of the current transformer body on the same side. The annular guide strips are sealed to the side wall of the current transformer body and the annular outer shell. Each annular guide strip has a notch, and the notches of two adjacent annular guide strips are located at both ends of the same diameter direction of the current transformer body. The cooling medium inlet pipe and the cooling medium outlet pipe are located on the outer periphery of the annular outer shell, and the cooling medium outlet pipe and the cooling medium inlet pipe are located on the annular outer shell outside the outermost annular guide strip on the same side. The notches of the cooling medium outlet pipe and the cooling medium inlet pipe and the outermost annular guide strip on the same side are located at both ends of the same diameter direction of the current transformer body.
[0007] The size of the notches on the annular guide strips on the same side of the transformer body increases gradually from the outside to the inside.
[0008] The transformer body includes an iron core, a coil, and an inner housing. The iron core is disposed inside the inner housing, and the coil is wound around the iron core. Both ends of the coil extend outward from the outer side wall of the outer housing. Several heat dissipation fins are arranged in a ring at intervals on the inner side of the two end side walls of the inner housing. Sealant is injected into the inner housing to fill the gaps between the heat dissipation fins.
[0009] The present invention provides a heat-dissipating current transformer in which a cooling cavity is formed between the outer casing and the transformer body for the flow of a cooling medium. By using different types of cooling media, the heat dissipation performance of the current transformer can be changed, thereby adapting to different external environments and maintaining stable performance. Attached Figure Description
[0010] Figure 1 This is a front view of the structure of this utility model;
[0011] Figure 2 for Figure 1 Schematic diagram of AA section;
[0012] Figure 3 This is a side view of the structure of this utility model;
[0013] Figure 4 for Figure 3 Schematic diagram of the BB cross section;
[0014] Figure 5 for Figure 3 A schematic diagram of the CC section;
[0015] Figure 6 This is a three-dimensional structural view of the present invention. Detailed Implementation
[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0017] Example 1:
[0018] like Figures 1-6As shown, this utility model discloses a current transformer with easy heat dissipation, including a transformer body 3. An annular outer shell 1 is provided on the outer sidewalls of both ends of the transformer body 3, and a cylindrical outer shell 2 is provided on the inner sidewall of the inner sidewall of the transformer body 3. There are gaps between the annular outer shell 1 and the sidewalls of the transformer body 3, and there are gaps between the cylindrical outer shell 2 and the inner sidewall of the transformer body 3. The annular outer shell 1 and the cylindrical outer shell 2 are connected as an integral structure. The outer edge of the annular outer shell 1 extends towards the edge of the sidewall of the transformer body 3 and is connected as an integral structure. The annular outer shell 1, the cylindrical outer shell 2 and the transformer body 3 form a closed cooling cavity 5. A cooling medium inlet pipe 6 is provided on one side of the annular outer shell 1, and a cooling medium outlet pipe 7 is provided on the other side of the annular outer shell 1. The cooling medium inlet pipe 6 and the cooling medium outlet pipe 7 are both connected to the cooling cavity 5.
[0019] An annular outer casing 1 is provided on both end sidewalls of the current transformer body 3, and a cylindrical outer casing 2 is provided on the inner side of its inner sidewall, forming an integral structure. Simultaneously, the outer edge of the annular outer casing extends towards both end sidewalls of the current transformer body 3, forming a sealed cooling chamber 5. A cooling medium outlet pipe 7 and a cooling medium inlet pipe 6 are respectively provided on the annular outer casing 1 at both ends of the current transformer body 3. In actual use, if the ambient temperature is relatively low, the current transformer can be used directly, and even antifreeze can be injected into the cooling chamber 5 to provide some insulation. Of course, shut-off valves can be installed on the cooling medium inlet pipe 6 and the cooling medium outlet pipe 7 to retain the medium inside the cooling chamber 5. If the ambient temperature is relatively high, a fan or airflow duct can be connected to the cooling medium inlet pipe 6 to supply cooling air into the cooling chamber 5 to dissipate heat from the current transformer body 3. When the ambient temperature exceeds the normal operating temperature, circulating cooling water can be supplied to the cooling chamber 5 through the cooling medium inlet pipe 6 and the cooling medium outlet pipe 7. The temperature of the cooling water can be controlled and adjusted according to actual needs to achieve stable heat dissipation and cooling of the transformer body 3, ensuring that the transformer body 3 can operate normally and stably under high temperature conditions.
[0020] Therefore, the above scheme can select different media to cool or insulate the transformer body 3 according to actual needs, so as to ensure the normal and stable operation of the transformer and reduce unnecessary energy consumption.
[0021] Two layers of annular guide strips 8 with different diameters are provided between the annular outer shell 1 and the side wall of the current transformer body 3 on the same side. The annular guide strips 8 are sealed to the side wall of the current transformer body 3 and the annular outer shell 1. Each annular guide strip 8 is provided with a notch 9, and the notches 9 of two adjacent annular guide strips 8 are located at both ends of the same diameter direction of the current transformer body 3. The cooling medium inlet pipe 6 and the cooling medium outlet pipe 7 are located on the periphery of the annular outer shell 1, and the cooling medium outlet pipe 7 and the cooling medium inlet pipe 6 are located on the annular outer shell 1 on the same side, outside the outermost annular guide strip 8. The notches 9 of the cooling medium outlet pipe 7 and the cooling medium inlet pipe 6 and the outermost annular guide strip 8 on the same side are located at both ends of the same diameter direction of the current transformer body 3.
[0022] Since the cooling cavities 5 at both ends of the transformer body 3 are annular structures, and the two ends of the cooling cavities 5 are connected by a central annular channel, they ultimately form the cooling cavities 5. The cooling medium inlet pipe 6 and the cooling medium outlet pipe 7 are respectively located on the cooling cavities 5 at both ends of the transformer body 3. To allow the cooling medium to flow through the entire cooling cavities 5, annular guide strips 8 are provided inside the cooling cavities 5 at both ends of the transformer body 3. In this embodiment, two annular guide strips 8 are provided at both ends of the transformer body 3, and the notches 9 of the annular guide strips 8 are located at both ends in the same diameter direction. When the medium enters the cooling chamber 5 from the cooling medium inlet pipe 6, it first flows to the outside of the outermost annular guide strip 8. At this time, the cooling medium flows from both sides of the outermost annular guide strip 8 to its notch 9, enters between the two annular guide strips 8 through the notch 9, and flows from both sides between the two annular guide strips 8. Finally, it enters the internal region through the notch 9 of the inner annular guide strip 8, and finally flows from the inner wall of the transformer body 3 and the cylindrical outer shell 2 into the cooling chamber 5 at the other end of the transformer body 3. The reverse flow flows from the center of the transformer body 3 outward to the cooling medium outlet pipe 7 for output. During the above flow process, the cooling medium achieves full coverage of the cooling chamber 5, which effectively improves the heat dissipation and cooling of the transformer body 3, ensuring the stable operation of the transformer and uniform heat dissipation and cooling.
[0023] The size of the notches 9 on the annular guide strips 8 on the same side of the transformer body 3 increases progressively from the outside to the inside. Since the radius of the inner annular guide strip 8 is smaller, and its entire circumference is connected to the cylindrical outer shell 2, the notches 9 of the inner annular guide strip 8 are larger in order to allow the cooling medium to flow evenly and stably between the cylindrical outer shell 2 and the inner wall of the transformer body 3. This allows more cooling medium to quickly enter the interior of the inner annular guide strip 8, ensuring the amount of cooling medium inside while effectively reducing the flow rate of the cooling medium at this location. This allows the cooling cutoff to fully cover the interior area of the inner annular guide strip 8, ensuring more uniform and comprehensive cooling and improving the cooling effect on the transformer body 3.
[0024] The transformer body 3 includes an iron core 32, a coil 33, and an inner housing 31. The iron core 32 is disposed inside the inner housing 31. The coil 33 is wound around the iron core 32, and both ends of the coil 33 extend outward from the outer side wall of the outer housing. Several heat dissipation fins 34 are arranged in a ring at intervals on the inner side of the side walls at both ends of the inner housing 31. Sealant is injected into the inner housing 31 to fill the gaps between the heat dissipation fins 34.
[0025] In existing technologies, the transformer body 3 is generally composed of an iron core 32, a coil 33, and an inner shell 31, with sealant injected inside the inner shell 31. However, in this configuration, the contact area between the sealant and the outer shell is relatively small. Since sealant often has relatively poor heat dissipation, several heat dissipation fins 34 are provided inside the inner shell 31 to increase the contact area between the sealant, the heat dissipation fins 34, and the inner shell 31. This allows the heat from the sealant to be better transferred to the inner shell 31, ensuring that the cooling medium dissipates heat effectively. This significantly improves the heat dissipation performance of the transformer body 3 and its internal iron core 32 and coil 33, resulting in better heat dissipation.
[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. 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 with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0027] In the description of this application, it should be noted that, unless otherwise expressly 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A heat-dissipating current transformer, comprising a transformer body, characterized in that: An annular outer shell is provided on the outer sidewalls at both ends of the current transformer body, and a cylindrical outer shell is provided on the inner sidewall of the current transformer body. There are gaps between the annular outer shell and the sidewalls of the current transformer body, and there are gaps between the cylindrical outer shell and the inner sidewall of the current transformer body. The annular outer shell and the cylindrical outer shell are connected as an integral structure. The outer edge of the annular outer shell extends towards the edge of the sidewall of the current transformer body and is connected as an integral structure. The annular outer shell, the cylindrical outer shell and the current transformer body form a closed cooling cavity. A cooling medium inlet pipe is provided on one side of the annular outer shell, and a cooling medium outlet pipe is provided on the other side of the annular outer shell. Both the cooling medium inlet pipe and the cooling medium outlet pipe are connected to the cooling cavity.
2. The heat-dissipating current transformer according to claim 1, characterized in that: At least two layers of annular guide strips with different diameters are provided between the annular outer shell and the side wall of the current transformer body on the same side. The annular guide strips are sealed to the side wall of the current transformer body and the annular outer shell. Each annular guide strip has a notch, and the notches of two adjacent annular guide strips are located at both ends of the same diameter direction of the current transformer body. The cooling medium inlet pipe and the cooling medium outlet pipe are located on the outer periphery of the annular outer shell, and the cooling medium outlet pipe and the cooling medium inlet pipe are located on the annular outer shell outside the outermost annular guide strip on the same side. The notches of the cooling medium outlet pipe and the cooling medium inlet pipe and the outermost annular guide strip on the same side are located at both ends of the same diameter direction of the current transformer body.
3. The heat-dissipating current transformer according to claim 2, characterized in that: The size of the notches on the annular guide strips on the same side of the transformer body increases gradually from the outside to the inside.
4. A heat-dissipating current transformer according to claim 1, 2, or 3, characterized in that: The transformer body includes an iron core, a coil, and an inner housing. The iron core is disposed inside the inner housing, and the coil is wound around the iron core. Both ends of the coil extend outward from the outer side wall of the outer housing. Several heat dissipation fins are arranged in a ring at intervals on the inner side of the two end side walls of the inner housing. Sealant is injected into the inner housing to fill the gaps between the heat dissipation fins.