External integrated transformer radiator
By designing an external integrated transformer radiator, the heat absorption chamber and heat dissipation channel in the heat dissipation jacket form a circulating heat dissipation pipeline, the problem of insufficient heat dissipation of the oil-immersed transformer is solved, and the transformer heat dissipation performance is improved and the failure rate is reduced.
Patent Information
- Application Number
- CN202421242019.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Oil-immersed transformers lack heat dissipation under high load and high ambient temperature conditions, resulting in reduced performance of insulation materials, increasing the possibility of spontaneous combustion and power outage protection, and existing solutions such as replacing larger-sized transformers are expensive and impractical.
An external integrated transformer radiator is designed, including a strip-shaped heat dissipation jacket, which is equipped with a heat absorption chamber and a heat dissipation channel. The two are filled with thermally conductive liquid to form a circulating heat dissipation pipeline. The jacket and the heat dissipation pipe outside the transformer are connected through a slot and thermally conductive silicone.
Without changing the transformer structure, the device significantly improves the heat dissipation performance of the transformer, reduces the failure rate, reduces the power outage time and replacement cost.
Smart Images
Figure CN222546078U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of transformers, in particular to an external integrated transformer radiator. Background Art
[0002] The existing transformer heat dissipation methods are mainly divided into two types:
[0003] 1. Dry-type transformer, heat dissipation is achieved through insulating epoxy resin.
[0004] 2. Oil-immersed transformer, heat is brought to the transformer fins for heat dissipation through transformer oil.
[0005] However, oil-immersed transformers have the following disadvantages:
[0006] 1. As the power consumption increases, the transformer load increases and the transformer temperature rises higher and higher.
[0007] 2. The heat dissipation of the transformer is greatly affected by the ambient temperature. For example, in Guangzhou, the outdoor temperature reaches 40 degrees Celsius, and the power consumption of air conditioning surges and forms a continuous peak in power consumption. If the transformer runs for a long time under this condition, its temperature will exceed the safe temperature for a long time, the performance of the insulation material will decrease, and the possibility of spontaneous combustion or power-off protection will increase, affecting industrial and residential electricity consumption.
[0008] In order to solve the above problems, a larger transformer can be replaced, but the design life of the transformer is generally 20 years and the cost is high. Replacing an undamaged transformer simply because the heat dissipation problem cannot be solved, on the one hand, the workload of disassembly and assembly is large, and the replacement process requires regional power outages, which has a great impact on residents' electricity consumption. On the other hand, there are many transformers in the area, and the cost of replacing all of them is extremely high, which wastes resources. Therefore, there is a need for an auxiliary heat dissipation device that improves the heat dissipation performance of the transformer without changing the installed transformer. Utility Model Content
[0009] Aiming at the defects in the prior art, the heat dissipation performance of the transformer is improved and the failure rate caused by excessive temperature is reduced. The utility model provides an external integrated transformer radiator, including a strip-shaped heat dissipation jacket; one side of the heat dissipation jacket is provided with a card slot adapted to the heat dissipation pipe outside the transformer, and the card slot is closely attached to the outer surface of the heat dissipation pipe, so that the heat dissipation jacket is connected to the heat dissipation pipe; the heat dissipation jacket is provided with a heat absorption cavity extending along the length direction of the heat dissipation jacket, and the heat absorption cavity is close to the card slot; the heat dissipation jacket is also provided with a heat dissipation channel extending along the length direction of the heat dissipation jacket, and the heat dissipation channel is close to the outer surface of the heat dissipation jacket; the upper end and the lower end of the heat dissipation channel are respectively connected with the upper end and the lower end of the heat absorption cavity in a one-to-one correspondence, and the heat dissipation channel and the heat absorption cavity are filled with heat-conducting liquid, and the heat-conducting liquid flows into the upper end of the heat dissipation channel after absorbing heat in the heat absorption cavity, and flows downward through the heat dissipation channel and then enters the lower end of the heat absorption cavity, so that the heat dissipation channel and the heat absorption cavity form a circulating heat dissipation pipeline.
[0010] The beneficial effects of this device are:
[0011] 1. The card slot of the heat dissipation jacket is directly stuck on the outside of the heat dissipation pipe outside the transformer, without making any changes to the structure of the transformer itself, avoiding the high cost of disassembling and assembling the transformer. At the same time, the heat dissipation jacket is easy to install, the power outage time will not be very long, and the impact on residents' electricity consumption is very small.
[0012] 2. The heat dissipation jacket absorbs the heat of the heat dissipation pipe outside the transformer and performs secondary heat dissipation, which reduces the temperature of the heat dissipation pipe, thereby improving the heat dissipation speed and heat dissipation performance of the transformer oil, which is beneficial to reducing the failure rate of the transformer.
[0013] Preferably, the cross-sectional shape of the heat dissipation jacket and the cross-sectional shape of the heat absorption chamber are both concave, and the heat absorption chamber is wrapped in the card slot. Thermal conductive silicone is provided between the card slot and the heat dissipation pipe of the transformer. The heat absorption chamber covers the heat dissipation pipe as much as possible, increases the heat absorption area, and improves the heat transfer efficiency.
[0014] Preferably, the width of the side of the slot is greater than the width of the heat dissipation pipe; the heat dissipation jacket includes bolts that penetrate the two sides of the slot horizontally, and the bolts are adjacent to the heat dissipation pipe. There are four bolts, two of which are located at the upper and lower parts of the heat dissipation jacket, and the other two are located in the middle of the heat dissipation jacket. The four bolts penetrate the opening side of the slot horizontally, thereby blocking the heat dissipation pipe in the slot. Even if the thermal conductive silicone ages and loses adhesion, the heat dissipation jacket will not fall off, and there is no problem of parts falling off.
[0015] Preferably, the heat dissipation channel is distributed in the heat dissipation jacket in a spiral extending manner. The heat dissipation area of the spiral heat dissipation channel is larger than that of the linear heat dissipation channel, and the heat transfer efficiency is higher.
[0016] Preferably, a vacuum chamber is provided inside the heat dissipation jacket between the heat dissipation channel and the heat absorption chamber. The vacuum chamber hinders heat transfer between the heat dissipation channel and the heat absorption chamber, increases the temperature difference between the heat dissipation channel and the heat absorption chamber, and is conducive to accelerating the flow speed of the heat transfer liquid, thereby improving the heat dissipation efficiency.
[0017] Preferably, the projection shape of the heat dissipation channel on the end surface of the heat dissipation jacket is an ellipse, and the outer surface of the heat dissipation jacket is provided with an arc surface adapted to the heat dissipation channel. The wall thickness between the heat dissipation channel and the outer surface of the heat dissipation jacket does not exceed 2 mm, and half of the heat dissipation channel is thin-walled, thereby improving the heat exchange efficiency with the outside world.
[0018] Preferably, the heat dissipation jacket is made of copper, and an anti-rust layer is provided on the outer surface of the heat dissipation jacket. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.
[0020] Figure 1 Schematic diagram of a transformer with a heat dissipation pipe in this embodiment;
[0021] Figure 2 for Figure 1 Schematic diagram of the heat dissipation pipe after being externally connected to the heat dissipation jacket;
[0022] Figure 3 for Figure 1 A schematic diagram of a heat dissipation pipe and a heat dissipation jacket;
[0023] Figure 4 for Figure 3 Schematic diagram of the middle heat absorption cavity and heat dissipation channel after being divided into three sections;
[0024] Figure 5 for Figure 3 Right view of;
[0025] Figure 6 for Figure 5 Schematic diagram of the internal structure of the upper end of the middle heat dissipation jacket;
[0026] Figure 7 is a schematic diagram of the heat dissipation jacket in this embodiment;
[0027] Figure 8 for Figure 7 Left view of .
[0028] In the attached drawings, there are heat dissipation pipe 1, heat dissipation jacket 2, card slot 3, thermal conductive silica gel 4, bolt 5, heat absorption cavity 6, heat dissipation channel 7 and vacuum cavity 8. DETAILED DESCRIPTION
[0029] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.
[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.
[0031] like Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, this embodiment provides an external integrated transformer heat sink, including a strip-shaped heat dissipation jacket 2. One side of the heat dissipation jacket 2 is provided with a card slot 3 adapted to the heat dissipation pipe 1 outside the transformer, and the card slot 3 is closely attached to the outer surface of the heat dissipation pipe 1, thereby connecting the heat dissipation jacket 2 to the heat dissipation pipe 1. The heat dissipation jacket 2 in this embodiment is suitable for the arc-shaped heat dissipation pipe 1, and the corresponding card slot 3 is also arc-shaped. In order to improve the heat conduction efficiency, a thermal conductive silicone 4 is provided between the card slot 3 and the heat dissipation pipe 1 of the transformer. Increase the heat absorption area and improve the heat transfer efficiency. In addition, the width of the side of the card slot 3 is greater than the width of the heat dissipation pipe 1. The heat dissipation jacket 2 includes bolts 5 that pass through the two sides of the card slot 3 horizontally, and the bolts 5 are adjacent to the heat dissipation pipe 1. There are four bolts 5, two of which are respectively located at the upper and lower parts of the heat dissipation jacket 2, and the other two bolts 5 are located in the middle of the heat dissipation jacket 2. Four bolts 5 are horizontally passed through one side of the opening of the slot 3, thereby blocking the heat dissipation pipe 1 in the slot 3. Even if the thermal conductive silicone 4 ages and loses adhesion, the heat dissipation jacket 2 will not fall off, and there is no problem of parts falling.
[0032] In this embodiment, the heat dissipation jacket 2 is made of copper, and the outer surface of the heat dissipation jacket 2 is provided with an anti-rust layer. It can be exposed outdoors for a long time without being corroded, and has a long service life. The heat dissipation jacket 2 absorbs the heat of the heat dissipation pipe 1 outside the transformer and then performs secondary heat dissipation, which reduces the temperature of the heat dissipation pipe 1, thereby improving the heat dissipation speed and heat dissipation performance of the transformer oil, which is beneficial to reducing the failure rate of the transformer.
[0033] In order to make the heat dissipation speed of the heat dissipation jacket 2 faster, the internal structure of the heat dissipation jacket 2 is improved as follows in this embodiment:
[0034] Regarding heat absorption, Figure 3 and Figure 6As shown, a heat absorption cavity 6 extending along the length direction of the heat dissipation jacket 2 is provided inside the heat dissipation jacket 2, and the heat absorption cavity 6 is close to the card slot 3. The cross-sectional shape of the heat dissipation jacket 2 and the cross-sectional shape of the heat absorption cavity 6 are both concave, and the heat absorption cavity 6 is wrapped in the card slot 3, and the wall thickness between the heat absorption cavity 6 and the card slot 3 does not exceed 2 mm, forming a thin-walled heat absorption structure.
[0035] Regarding heat dissipation, Figure 3 and Figure 6 As shown, the interior of the heat dissipation jacket 2 is also provided with a heat dissipation channel 7 extending along the length direction of the heat dissipation jacket 2, and the heat dissipation channel 7 is close to the outer surface of the heat dissipation jacket 2. Specifically, the projection shape of the heat dissipation channel 7 on the end face of the heat dissipation jacket 2 is an ellipse, and the outer surface of the heat dissipation jacket 2 is provided with an arc surface adapted to the heat dissipation channel 7. The wall thickness between the heat dissipation channel 7 and the outer surface of the heat dissipation jacket 2 does not exceed 2 mm, and half of the heat dissipation channel 7 is thin-walled, which improves the heat exchange efficiency with the outside world. Furthermore, the heat dissipation channel 7 is distributed in the interior of the heat dissipation jacket 2 in a spiral extension manner. The spiral heat dissipation channel 7 has a larger heat dissipation area than the linear heat dissipation channel 7 and a higher heat transfer efficiency.
[0036] The upper end and the lower end of the heat dissipation channel 7 are respectively connected to the upper end and the lower end of the heat absorption chamber 6 in a one-to-one correspondence, and the heat dissipation channel 7 and the heat absorption chamber 6 are both filled with heat-conducting liquid. After absorbing heat in the heat absorption chamber 6, the heat-conducting liquid flows into the upper end of the heat dissipation channel 7, flows downward through the heat dissipation channel 7 and then enters the lower end of the heat absorption chamber 6, thereby forming a circulating heat dissipation pipe 1 with the heat absorption channel 7 and the heat absorption chamber 6.
[0037] The heat dissipation principle of the heat dissipation jacket 2 in this embodiment is as follows:
[0038] After the heat absorption chamber 6 absorbs the heat of the heat dissipation tube 1, the heat transfer liquid in the heat absorption chamber 6 heats up and flows upward. The reason for the upward flow is that the transformer oil in the heat dissipation tube 1 flows from top to bottom. The lower it goes, the lower the temperature of the transformer oil. Therefore, the temperature of the transformer oil in the upper part of the heat dissipation tube 1 is higher than that of the transformer oil in the lower part of the heat dissipation tube 1, forming a temperature difference. Inside the transformer, the heated transformer oil moves upward and enters from the upper end of the heat dissipation tube 1. After the heat is dissipated by the heat dissipation tube 1, the temperature of the transformer oil decreases. The transformer oil in the heat dissipation tube 1 flows downward and enters the transformer from the lower end of the heat dissipation tube 1, and the cycle continues.
[0039] The heat absorption chamber 6 is wrapped around the outside of the heat dissipation tube 1, and the heat conduction liquid in the heat absorption chamber 6 also has a temperature difference. Similarly, the temperature of the heat conduction liquid in the upper part of the heat absorption chamber 6 is higher than the temperature of the heat conduction liquid in the lower part of the heat absorption chamber 6, which also forms a temperature difference. The heat conduction liquid flows upward and enters the heat dissipation channel 7 from the upper end of the heat absorption chamber 6, and the heat conduction liquid in the heat dissipation channel 7 flows downward and enters the heat absorption chamber 6 from the lower end of the heat dissipation channel 7, thereby forming a circulation between the heat dissipation channel 7 and the heat absorption chamber 6.
[0040] The main factor affecting the circulation speed of the heat transfer liquid is the temperature difference. For this reason, a vacuum chamber 8 is provided inside the heat dissipation jacket 2 between the heat dissipation channel 7 and the heat absorption chamber 6. The vacuum chamber 8 hinders the heat transfer between the heat dissipation channel 7 and the heat absorption chamber 6, increases the temperature difference between the heat dissipation channel 7 and the heat absorption chamber 6, and is conducive to accelerating the flow speed of the heat transfer liquid, thereby improving the heat dissipation efficiency.
[0041] like Figure 4 As shown, the factors affecting the circulation speed of the heat-conducting liquid include the length of the heat dissipation channel 7 and the heat absorption chamber 6. The longer the length, the greater the flow resistance. For this reason, the heat dissipation channel 7 in this embodiment can be divided into three sections of independent heat dissipation channels 7 that do not affect each other: upper, middle, and lower. Correspondingly, the heat absorption chamber 6 is also divided into three sections of independent heat absorption chambers 6 that do not affect each other: upper, middle, and lower. The three sections of independent heat dissipation channels 7 are connected to the three sections of independent heat absorption chambers 6 in a one-to-one correspondence. Each independent heat dissipation channel 7 and the corresponding independent heat absorption chamber 6 are filled with heat-conducting liquid. The heat-conducting liquid circulates, the flow path is shorter, and the heat dissipation speed is faster, so that the heat dissipation efficiency of the entire heat dissipation jacket 2 is higher, and the heat dissipation performance of the transformer is correspondingly higher.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
Claims
1. An external integrated transformer radiator, characterized in that: It comprises a strip-shaped heat dissipation jacket; one side of the heat dissipation jacket is provided with a card slot adapted to the heat dissipation pipe outside the transformer, and the heat dissipation jacket is closely attached to the outer surface of the heat dissipation pipe through the card slot, thereby connecting the heat dissipation jacket with the heat dissipation pipe; The heat dissipation jacket is provided with a heat absorption cavity extending along the length direction of the heat dissipation jacket, and the heat absorption cavity is close to the card slot; the heat dissipation jacket is also provided with a heat dissipation channel extending along the length direction of the heat dissipation jacket, and the heat dissipation channel is close to the outer surface of the heat dissipation jacket; the upper end and the lower end of the heat dissipation channel are respectively connected with the upper end and the lower end of the heat absorption cavity in a one-to-one correspondence, and the heat dissipation channel and the heat absorption cavity are filled with heat-conducting liquid. After absorbing heat in the heat absorption cavity, the heat-conducting liquid flows into the upper end of the heat dissipation channel, and flows downward through the heat dissipation channel and then enters the lower end of the heat absorption cavity, so that the heat dissipation channel and the heat absorption cavity form a circulating heat dissipation pipeline.
2. The external integrated transformer heat sink according to claim 1, characterized in that: The cross-sectional shape of the heat dissipation jacket and the cross-sectional shape of the heat absorption cavity are both concave, and the heat absorption cavity is wrapped in the card slot.
3. The external integrated transformer heat sink according to claim 1, characterized in that: Heat-conducting silica gel is arranged between the card slot and the heat dissipation pipe of the transformer.
4. The external integrated transformer heat sink according to claim 1, characterized in that: The width of the side surface of the slot is greater than the width of the heat dissipation pipe; the heat dissipation jacket comprises bolts which penetrate the two side surfaces of the slot transversely, and the bolts are adjacent to the heat dissipation pipe.
5. The external integrated transformer heat sink according to claim 4, characterized in that: There are four bolts, two of which are located at the upper part and the lower part of the heat dissipation jacket respectively, and the other two bolts are located at the middle part of the heat dissipation jacket.
6. The external integrated transformer heat sink according to claim 1, characterized in that: The heat dissipation channels are distributed inside the heat dissipation jacket in a spiral extending manner.
7. The external integrated transformer heat sink according to claim 6, characterized in that: The heat dissipation jacket has a vacuum chamber located between the heat dissipation channel and the heat absorption chamber.
8. The external integrated transformer heat sink according to claim 6, characterized in that: The projection shape of the heat dissipation channel on the end surface of the heat dissipation jacket is an ellipse, and the outer surface of the heat dissipation jacket is provided with an arc surface adapted to the heat dissipation channel.
9. The external integrated transformer heat sink according to claim 1, characterized in that: The material of the heat dissipation jacket is copper.
10. The external integrated transformer heat sink according to claim 9, characterized in that: The outer surface of the heat dissipation jacket is provided with an anti-rust layer.