A laminated transformer with an auxiliary heat dissipation structure

Abstract

This utility model relates to the field of transformer heat dissipation technology and discloses a laminated transformer with an auxiliary heat dissipation structure. The transformer body has an auxiliary heat dissipation assembly on its outer wall. The auxiliary heat dissipation assembly includes a heat dissipation block, a flared opening, and auxiliary heat dissipation fins. The heat dissipation block is fixed to the outer wall of the transformer body, and multiple heat dissipation cylinders are provided inside the heat dissipation block. Guide plates are fixed to the inner walls of the heat dissipation cylinders. The flared opening is located at the lower end of the heat dissipation cylinder, and a flow-guiding plate is fixedly connected to its inner wall. The diameter of the flared opening gradually decreases from bottom to top. The auxiliary heat dissipation fins are fixed to the outer wall of the heat dissipation block. The beneficial effect is that, due to the tapered flared opening at the lower end of the heat dissipation cylinder, along with the guide plates and flow-guiding plates, the airflow velocity is greatly increased, forming a spiral flow channel that extends the airflow path and enhances turbulence, accelerating the rise of hot air inside the heat dissipation cylinder and the cooling process of drawing in cold air from the outside. This solves the technical problem of poor heat dissipation in existing transformers.

Description

Technical Field

[0001] This utility model relates to the field of transformer heat dissipation technology, specifically to a laminated transformer with an auxiliary heat dissipation structure. Background Technology

[0002] Laminated transformers are transformers that use multiple layers of thin steel sheets to form the core. Their core feature is that the layered structure effectively reduces iron loss and improves magnetic flux utilization. Because the silicon steel sheets are coated with an insulating layer, the transverse current path can be blocked, thereby significantly reducing energy loss caused by alternating magnetic fields. This structure is widely used in small and medium capacity applications such as distribution transformers and control transformers, and has the advantages of compact structure, mature manufacturing process and reliable operation.

[0003] However, most existing transformers are equipped with arrayed heat sinks around the perimeter to accelerate the dissipation of heat inside the transformer. However, in the absence of natural wind, the heat dissipation effect of the transformer's own heat sinks will be poor. If this heat is not dissipated in time, it will easily affect the use of the transformer. In view of this, we propose a laminated transformer with an auxiliary heat dissipation structure. Utility Model Content

[0004] The purpose of this invention is to provide a laminated transformer with an auxiliary heat dissipation structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a laminated transformer with an auxiliary heat dissipation structure, comprising a transformer body, wherein an auxiliary heat dissipation assembly is provided on the outer wall of the transformer body, the auxiliary heat dissipation assembly comprising:

[0006] A heat sink is fixedly connected to the outer wall of the transformer body. Multiple heat sink cylinders are arranged side by side at intervals inside the heat sink, and guide plates are fixedly connected to the inner wall of the heat sink cylinder.

[0007] The flared opening is located at the lower end of the heat sink and is connected to the heat sink. The diameter of the flared opening gradually decreases from bottom to top. A drainage plate is fixedly connected to the inner wall of the flared opening.

[0008] A secondary heat sink is fixedly connected to the outer wall of the heat sink block.

[0009] Preferably, the auxiliary heat dissipation components are provided in several groups, and the several groups of auxiliary heat dissipation components are equally spaced on the outer wall of the transformer body, with the side walls of every two groups of auxiliary heat dissipation components being in contact with each other.

[0010] Preferably, the heat sink is fixedly connected to the outer wall of the transformer body, the heat sink cylinder is vertically arranged, the guide plate is spirally arranged, the spiral angle range is 15°–25°, and the pitch is 0.6–0.8 times the inner diameter of the heat sink cylinder. The guide plate guides the airflow and increases the contact area between the airflow and the inner wall of the heat sink cylinder.

[0011] Preferably, the draining plate is spirally arranged on the inner wall of the flared opening, and its spiral direction is consistent with that of the guide plate. The spiral angle range is 15°–25°, and the pitch is 0.6–0.8 times the inner diameter of the heat sink.

[0012] Preferably, the flared end has a large diameter end and a small diameter end, the diameter ratio of the large diameter end to the small diameter end is 2:1, and the cone angle is 30°–45°.

[0013] Preferably, the number of auxiliary heat sinks is set to several groups, and the several groups of auxiliary heat sinks are set on the side of the heat sink away from the transformer body. The auxiliary heat sinks increase the contact area between the heat sink and the external environment, thereby improving the heat dissipation effect of the heat sink.

[0014] Preferably, a plug is fixedly connected to the side of the heat sink away from the secondary heat sink, and the plug is inserted into the outer wall of the transformer body and connected to the transformer body.

[0015] Preferably, the inner wall of the heat sink is electroplated with a black aluminum oxide coating.

[0016] Compared with the prior art, this utility model provides a laminated transformer with an auxiliary heat dissipation structure, which has the following beneficial effects:

[0017] 1. This laminated transformer with auxiliary heat dissipation structure, by setting a heat dissipation cylinder in the heat dissipation block and setting a tapered flared mouth at the lower end of the heat dissipation cylinder, greatly increases the airflow velocity. Guide plates are set inside the heat dissipation cylinder and flow guide plates are set inside the flared mouth, forming a spiral flow channel to extend the airflow path and enhance turbulence, accelerating the rise of hot air inside the heat dissipation cylinder and the heat dissipation process of drawing in cold air from the outside into the heat dissipation cylinder. Compared with the existing technology, it can enhance the circulation of hot and cold air, accelerate the heat exchange between the heat dissipation block and the heat dissipation cylinder, and expand the heat dissipation surface area through auxiliary heat dissipation fins, thus solving the technical problem of poor heat dissipation effect of existing transformers.

[0018] 2. This laminated transformer with auxiliary heat dissipation structure increases the heat exchange surface area between the transformer body and the heat sink by setting the plug, providing an additional heat path, reducing thermal contact resistance, and making it easier and faster for the heat from the transformer body to be transferred to the heat sink and then to the air, thus improving the heat dissipation effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0020] Figure 2 This utility model Figure 1 Schematic diagram of the structure of region A in the middle;

[0021] Figure 3 This is a schematic diagram of the heat sink structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the heat sink of this utility model.

[0023] In the diagram: 1. Transformer body; 2. Auxiliary heat dissipation assembly; 201. Heat sink block; 202. Heat sink cylinder; 203. Guide plate; 204. Horn mouth; 205. Current diverting plate; 206. Secondary heat sink; 3. Insert block. Detailed Implementation

[0024] like Figure 1 – Figure 4 As shown, this utility model provides a technical solution: a laminated transformer with an auxiliary heat dissipation structure, including a transformer body 1, and an auxiliary heat dissipation component 2 is provided on the outer wall of the transformer body 1. The auxiliary heat dissipation component 2 includes a heat dissipation block 201, a heat dissipation cylinder 202, a guide plate 203, a flared mouth 204, a current-guiding plate 205, and a secondary heat dissipation plate 206.

[0025] In one embodiment of this utility model, a heat sink 201 is fixedly connected to the outer wall of the transformer body 1. Multiple heat sink cylinders 202 are arranged side-by-side at intervals inside the heat sink 201. The heat sink cylinders 202 are vertically arranged, their height not exceeding the height of the transformer body 1, and their inner diameter is 50mm–150mm. The inner wall is electroplated with a black aluminum oxide coating, the thickness of which is 0.1mm–0.3mm, to enhance radiative heat dissipation efficiency. The electroplating process is a mature existing technology and will not be described in detail here.

[0026] The inner wall of the heat sink 202 is fixedly connected with a guide plate 203, which is usually made of aluminum alloy. The guide plate 203 is spirally arranged and guides the airflow. At the same time, the guide plate 203 increases the contact area between the airflow and the inner wall of the heat sink 202. The spiral design extends the airflow path and can improve the uniformity of heat exchange.

[0027] The flare 204 is located below the heat sink 202 and is connected to the heat sink 202. The diameter of the flare 204 gradually decreases from bottom to top.

[0028] Furthermore, the flare 204 is provided with a large-diameter end and a small-diameter end. The large-diameter end is located on the side of the heat sink 201 near the bottom, and the small-diameter end is connected to the heat sink 202, with airflow flowing from the large-diameter end to the small-diameter end. The diameter ratio of the large-diameter end to the small-diameter end is 2:1, and the specific size is adjusted according to the size specifications of the transformer. The cone angle is 30°–45° to achieve the effect of reducing the pipe diameter and increasing the flow velocity, with a flow velocity increase ratio of approximately 1.5–2 times, enhancing the upward movement of hot air and the intake and circulation of cold air. A guide vane 205 is fixedly connected to the inner wall of the flare 204. The guide vane 205 is spirally arranged on the inner wall of the flare 204 to guide the formation of airflow.

[0029] The auxiliary heat sink 206 is fixedly connected to the outer wall of the heat sink 201. Several sets of auxiliary heat sinks 206 are arranged on the side of the heat sink 201 away from the transformer body 1. The auxiliary heat sinks 206 increase the contact area between the heat sink 201 and the external environment, thereby improving the heat dissipation effect of the heat sink 201.

[0030] In practical applications, four sets of secondary heat sinks 206 are arranged in an array on the outer wall of the heat sink 201. The secondary heat sinks 206 are usually made of aluminum alloy, and their size is set according to actual needs.

[0031] The auxiliary heat dissipation components 2 are arranged in several groups, and the groups of auxiliary heat dissipation components 2 are equally spaced on the outer wall of the transformer body 1, with the side walls of every two groups of auxiliary heat dissipation components 2 in contact with each other.

[0032] The heat emitted by the transformer body 1 is transferred to the heat sink 201 through contact. The inner wall of the heat sink 202 is coated with a black aluminum oxide coating. At the same temperature, the radiant heat per unit area of ​​the black aluminum oxide coating is greatly increased, and heat can be emitted at a greater rate of thermal radiation. The heat accumulated inside the system is reduced. The heat sink 201 heats the air inside the heat sink 202. The heated air flows upward. Therefore, the outside air is drawn in from the large diameter end of the horn 204. Under the action of the guide plate 205, it is accelerated and swirled into the heat sink 202. The hot air spirals upward under the guidance of the guide plate 203 and is discharged from the top opening of the heat sink 202. The heat is radiated through the inner wall of the heat sink 202.

[0033] When the airflow passes through the flared opening 204, due to the principle of fluid continuity, the pipe diameter decreases and the flow velocity increases, thereby increasing the airflow speed and strengthening the circulation of internal hot air rising and external cold air being drawn in. The enhanced airflow circulation speed can remove heat more quickly, accelerate the heat exchange between the heat sink 201 and the air inside the heat sink 202, and increase the air exchange frequency of the entire auxiliary heat dissipation component 2. The secondary heat sink 206 increases the contact area between the heat sink 201 and the external environment, thereby improving the heat dissipation effect of the heat sink 201.

[0034] The airflow entering the horn 204 is guided by the guide plate 205, causing the airflow to enter the heat sink 202 in a spiral shape. Then it flows along the guide plate 203. The guide plate 203 also increases the contact area between the airflow and the inner wall of the heat sink 202. The spiral flow forces the airflow to rotate close to the cylinder wall. Compared with the straight flow, the spiral flow has a longer path and stronger turbulence, and can contact the inner wall of the heat sink 202 over a larger area. The spiral flow has a stronger stirring and mixing ability, improves the uniformity of airflow, and allows for more complete exchange of hot and cold air, removing more heat per unit time and improving heat dissipation efficiency.

[0035] In actual production applications, the helical directions of the flow guide 205 and the guide plate 203 are consistent, and the helical angle range is 15°–25°, usually set to 20°. The pitch of the flow guide 205 and the guide plate 203 is 0.6–0.8 times the inner diameter of the heat sink 202.

[0036] In addition, a plug 3 is fixedly connected to the side of the heat sink 201 away from the auxiliary heat sink 206. The plug 3 is inserted into the outer wall of the transformer body 1. The plug 3 increases the heat exchange surface area between the transformer body 1 and the heat sink 201, provides an additional heat path, reduces thermal contact resistance, and makes it easier and faster for the heat from the body to be transferred to the heat sink 201 and then to the air, thereby improving the heat dissipation effect.

[0037] In some feasible solutions, the insertion depth of the plug 3 is 10mm–30mm to increase the contact area with the transformer body 1 and reduce the thermal resistance of the hot contact.

[0038] The heat sink 201 and the insert 3 are typically made of a material with a thermal conductivity ≥150W / (m·K), such as aluminum alloy or pure copper.

[0039] In this invention, during use, the heat emitted by the transformer body 1 is transferred to the heat sink 201, which heats the air inside the heat sink 202. The heated air flows upward, causing outside air to be drawn into the heat sink 202 through the flare 204. When the airflow passes through the flare 204, the airflow velocity increases, enhancing the circulation of rising internal hot air and being drawn in external cold air. The guide plate 205 guides the airflow entering the flare 204, causing the airflow to enter the heat sink 202 in a spiral shape, and then flow along the guide plate 203. The guide plate 203 also increases the contact area between the airflow and the inner wall of the heat sink 202. The spiral flow has a stronger stirring and mixing ability, improving the uniformity of the airflow and allowing for more complete exchange between hot and cold air.

[0040] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A laminated transformer with an auxiliary heat dissipation structure, comprising a transformer body (1), characterized in that: An auxiliary heat dissipation assembly (2) is provided on the outer wall of the transformer body (1), and the auxiliary heat dissipation assembly (2) includes: Heat sink (201) is fixedly connected to the outer wall of the transformer body (1). Multiple heat sinks (202) are arranged side by side and spaced apart inside the heat sink (201). Guide plates (203) are fixedly connected to the inner wall of the heat sink (202). A flared opening (204) is provided at the lower end of the heat sink (202) and is connected to the heat sink (202). The diameter of the flared opening gradually decreases from bottom to top. A drain plate (205) is fixedly connected to the inner wall of the flared opening (204). A secondary heat sink (206) is fixedly connected to the outer wall of the heat sink (201).

2. A laminated transformer with an auxiliary heat dissipation structure according to claim 1, characterized in that: The auxiliary heat dissipation components (2) are arranged in several groups, and the auxiliary heat dissipation components (2) are arranged at equal intervals on the outer wall of the transformer body (1), with the side walls of every two groups of auxiliary heat dissipation components (2) being in contact with each other.

3. The laminated transformer with auxiliary heat dissipation structure according to claim 1, characterized in that: The heat sink (202) is vertically arranged, and the guide plate (203) is spirally arranged with a spiral angle range of 15°–25° and a pitch of 0.6–0.8 times the inner diameter of the heat sink (202).

4. The laminated transformer with auxiliary heat dissipation structure according to claim 3, characterized in that: The drain plate (205) is spirally arranged on the inner wall of the horn mouth (204), and its spiral direction is consistent with that of the guide plate (203). The spiral angle range is 15°–25°, and the pitch is 0.6–0.8 times the inner diameter of the heat sink (202).

5. A laminated transformer with an auxiliary heat dissipation structure according to claim 1, characterized in that: The flared mouth (204) is provided with a large diameter end and a small diameter end, the diameter ratio of the large diameter end to the small diameter end is 2:1, and the cone angle is 30°–45°.

6. A laminated transformer with an auxiliary heat dissipation structure according to claim 1, characterized in that: The number of the auxiliary heat sinks (206) is set in several groups, and the several groups of auxiliary heat sinks (206) are arranged on the side of the heat sink (201) away from the transformer body (1).

7. A laminated transformer with an auxiliary heat dissipation structure according to claim 1, characterized in that: A plug (3) is fixedly connected to the side of the heat sink (201) away from the auxiliary heat sink (206). The plug (3) is inserted into the outer wall of the transformer body (1) and connected to the transformer body (1).

8. The laminated transformer with auxiliary heat dissipation structure according to claim 1, characterized in that: The inner wall of the heat sink (202) is electroplated with a black aluminum oxide coating.

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