Corrugated radiating fin for oil-immersed transformer

Abstract

The utility model belongs to the technical field of transformer radiating fins, in particular to a corrugated radiating fin for an oil-immersed transformer, which comprises a radiating fin with an accommodating space inside, an oil inlet and an oil outlet are arranged on the radiating fin, the accommodating space comprises an oil passing chamber and a refrigerant chamber which are mutually independent, an input port of the oil passing chamber is the oil inlet, and an output port of the refrigerant chamber is the oil outlet. An oil passing chamber and a refrigerant chamber are arranged in the containing space, an output port of the oil passing chamber is an oil outlet, a refrigerant input port and a refrigerant output port are further formed in the cooling fins, and the refrigerant input port and the refrigerant output port are communicated with the refrigerant chamber. The containing space is divided into the oil passing chamber and the refrigerant chamber which are independent, so that the contact area of hot oil and refrigerant is increased; the heat dissipation path of the hot oil is optimized, and when the hot oil passes through the oil passing chamber, the cooling medium in the refrigerant chamber can cool the hot oil, so that the cooling effect of the hot oil is improved, and the stability and the reliability of the heat dissipation system are enhanced.

Description

Technical Field

[0001] This utility model belongs to the technical field of transformer heat sinks, specifically relating to a corrugated heat sink for oil-immersed transformers. Background Technology

[0002] During operation, the energy consumed in the core and windings of an oil-immersed transformer is converted into heat. This heat is carried away by the transformer oil and dissipated into the atmosphere through heat sinks. Maintaining the normal operating temperature of the transformer is crucial for its service life and stable operation. Since the air-side convective heat transfer resistance is the main factor affecting the entire heat dissipation process, traditional oil-immersed transformer cooling systems mainly rely on heat sinks. When the temperature of the transformer oil in the tank rises, its density decreases, generating buoyancy. Therefore, the hot oil moves upward to the top of the tank, flows along the oil outlet pipe into the heat sink, and flows from top to bottom along the storage space within the heat sink, dissipating the heat. It then returns to the tank through the return pipe. Heat sinks are usually designed with a corrugated shape to increase the heat dissipation area. However, in practical applications, due to the dense distribution of heat sinks, uneven heat dissipation often occurs. Especially when using natural convection or fan-driven cooling methods, some heat sinks may be blocked by others, preventing the hot oil from being effectively cooled, thus affecting the overall cooling effect of the transformer. Utility Model Content

[0003] To address the above problems, the purpose of this utility model is to provide a corrugated heat sink for oil-immersed transformers, thereby solving the problems mentioned in the background art.

[0004] This utility model provides a corrugated heat sink for an oil-immersed transformer, including a heat sink with an internal accommodating space. The heat sink is provided with an oil inlet and an oil outlet. The accommodating space includes an independent oil passage chamber and a refrigerant chamber. The oil passage chamber has an inlet as its input port and an outlet as its output port. The heat sink is also provided with a refrigerant inlet and a refrigerant outlet, both of which are connected to the refrigerant chamber.

[0005] Preferably, the oil passage chamber and the refrigerant chamber can be arranged along the length of the heat sink.

[0006] Preferably, the oil passage chamber and the refrigerant chamber can be arranged along the thickness direction of the heat sink.

[0007] Preferably, there are multiple oil passage chambers and refrigerant chambers, and the multiple oil passage chambers and refrigerant chambers are arranged alternately.

[0008] Preferably, the multiple oil passage chambers share a single oil inlet as the input port, and the multiple oil passage chambers share a single oil outlet as the output port.

[0009] Preferably, each of the plurality of refrigerant chambers has a refrigerant inlet and a refrigerant outlet connected thereto.

[0010] The beneficial effects of this utility model are: by dividing the containment space into an independent oil passage chamber and a refrigerant chamber, the contact area between hot oil and refrigerant is increased, the heat dissipation path of hot oil is optimized, and when hot oil passes through the oil passage chamber, the cooling medium in the refrigerant chamber can cool the hot oil, thereby increasing the cooling effect of hot oil and enhancing the stability and reliability of the heat dissipation system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the first cross-sectional structure of the first embodiment of the present invention;

[0013] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0014] Figure 4 This is a schematic diagram of the second cross-sectional structure of the second embodiment of the present invention;

[0015] Figure 5 This is an enlarged structural diagram of point B in this utility model;

[0016] Figure 6 This is an enlarged structural diagram of point C in this utility model.

[0017] Figure 7 This is a structural schematic diagram of the second embodiment of the present invention.

[0018] Figure 8 This is a cross-sectional view of the second embodiment of the present invention;

[0019] Figure 9 This is a schematic diagram of the structure of the third embodiment of the present invention;

[0020] Figure 10 This is a cross-sectional view of the third embodiment of the present invention.

[0021] In the diagram: 1. Storage space; 2. Heat sink; 3. Oil inlet; 4. Oil outlet; 5. Oil passage chamber; 6. Refrigerant chamber; 7. Refrigerant inlet; 8. Refrigerant outlet; 9. Unit body; 10. Oil tank; 11. Oil outlet pipe; 12. Oil return pipe; 13. Housing; 14. Output pipe; 15. Input pipe; 16. Circulation pump; 17. Refrigeration components. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0023] To facilitate understanding of the application of corrugated heat sink 2 in oil-immersed transformers by those skilled in the art, such as Figure 1 As shown, an oil-immersed transformer mainly includes an oil tank 10 for storing the transformer body 9 and an oil outlet pipe 11 and an oil return pipe 12 installed on the oil tank 10. The two ends of the heat sink 2 are connected to the oil outlet pipe 11 and the oil return pipe 12 respectively. When the temperature of the transformer oil in the oil tank 10 rises, its density decreases, generating buoyancy. Therefore, the hot oil will move upward to the top layer of the oil tank 10, flow along the oil outlet pipe 11 into the heat sink 2, and flow from top to bottom along the storage space inside the heat sink 2, dissipating the heat of the hot oil. It then flows back to the oil tank 10 through the oil return pipe 12. This process is repeated to realize the hot oil circulation cooling system. In the above hot oil circulation cooling system, the air on the outer surface of the heat sink 2 carries away the heat through natural convection or forced convection (such as fan drive), thus achieving heat dissipation. The above is an introduction to the existing corrugated heat sink 2 for oil-immersed transformers.

[0024] As can be seen from the above, the existing corrugated heat sink for oil-immersed transformers has the following defects when in use. Since the corrugated heat sink 2 is composed of several heat sinks 2, when using natural convection or fan-driven heat dissipation, one or more heat sinks 2 may block other heat sinks 2, thereby preventing the hot oil in the corrugated heat sink 2 from being effectively cooled. Based on the above problems, the present invention adopts the following improvement method to solve them.

[0025] like Figure 1-10 As shown, a corrugated heat sink for an oil-immersed transformer differs from existing technologies in that the storage space of the heat sink 2 is divided into an independent oil passage chamber 5 and a refrigerant chamber 6. The oil passage chamber 5 uses an oil inlet 3 as the input port for hot oil, which is connected to the oil outlet pipe 11. The oil passage chamber 5 uses an oil outlet 4 as the output port for hot oil, which is connected to the return oil pipe 12. When the hot oil enters the oil passage chamber 5 through the oil outlet pipe 11 and the oil inlet 3, it flows from top to bottom and finally flows back to the oil tank 10 along the oil outlet 4 and the return oil pipe 12. During the flow of the hot oil, it comes into contact with the refrigerant chamber 6 to achieve heat exchange, thereby achieving effective heat dissipation of the hot oil. Compared with the existing technologies such as natural convection and fan drive (not shown in the figure), the heat dissipation effect of this technical solution is better and can overcome the problem of poor heat dissipation caused by the large number and dense distribution of heat sinks 2.

[0026] The refrigerant compartment 6 is also equipped with a refrigerant inlet 7 and a refrigerant outlet 8. To further enhance the heat dissipation effect of the hot oil, the refrigerant inlet 7 and the refrigerant outlet 8 are connected to a refrigerant supply device. The refrigerant supply device mainly includes a housing 13 for storing refrigerant, an outlet pipe 14 for connecting the housing 13 to each refrigerant compartment 6 and for inputting refrigerant into the refrigerant compartment 6, an inlet pipe 15 for returning the refrigerant in the refrigerant compartment 6 to the housing 13, and a circulation pump 16 and a refrigeration assembly 17 installed on the outlet pipe 14. Under the action of the refrigerant, the refrigerant enters the refrigerant chamber 6 through the refrigerant inlet 7 and the outlet pipe 14, and flows back out to the housing 13 through the refrigerant outlet 8 and the inlet pipe 15. It is then cooled again by the refrigeration component 17. The cooled refrigerant then enters the refrigerant chamber 6 through the refrigerant inlet 7. The circulation of the refrigerant achieves effective heat dissipation of the hot oil. The refrigeration component 17 can adopt the principle of fan cooling or air conditioning cooling, which is common in daily life and will not be described in detail here. As long as it can achieve the cooling of the refrigerant, it is acceptable.

[0027] Furthermore, such as Figure 4-6 As shown, the heat sink 2 is a rectangular body with an internal accommodating space 1. In the first embodiment of this utility model, multiple frames are arranged in the accommodating space 1, and the sealed space enclosed by the multiple frames is the refrigerant chamber 6. The multiple frames are arranged at equal intervals along the length direction of the heat sink 2. The space between two adjacent frames is the oil passage chamber 5. The shape of the frames is not limited and can be rectangular, circular, etc. In order to improve the efficiency of hot oil heat dissipation, the frames are preferably rectangular with a shape similar to that of the heat sink 2. The oil passage chamber 5 and the refrigerant chamber 6 are both arranged along the length direction of the heat sink 2. There can be multiple oil passage chambers 5 and refrigerant chambers 6. The multiple oil passage chambers 5 and refrigerant chambers 6 are arranged alternately, which can make the hot oil passing through the heat sink 2 come into contact with the refrigerant chamber 6, thereby improving the efficiency of hot oil heat dissipation.

[0028] Furthermore, such as Figure 7-8 As shown, this is the second embodiment of the present invention. In the storage space, a refrigerant chamber 6 and an oil passage chamber 5 are formed by setting a partition. The two ends of the partition are connected to the inner top wall and the inner bottom wall of the heat sink 2, respectively. The oil passage chamber 5 and the refrigerant chamber 6 can also be arranged along the thickness direction of the heat sink 2. Compared with the first embodiment, this embodiment can increase the area of ​​the oil passage chamber 5 and the refrigerant chamber 6, thereby increasing the contact area between the hot oil and the refrigerant and improving the efficiency of the hot oil cooling. The heat sink 2 can be set with different sizes. For the heat sink 2 with a larger thickness, multiple partitions can be set to form multiple equidistant and independent spaces. The multiple independent spaces are, in sequence, oil passage chamber 5-1, refrigerant chamber 6-1, oil passage chamber 5-2, refrigerant chamber 6-2, ... The multiple oil passage chambers 5 and refrigerant chambers 6 are arranged alternately so that the hot oil passing through each oil passage chamber 5 can contact the refrigerant chamber 6 in the refrigerant chamber 6.

[0029] like Figure 9-10As shown, this is the third embodiment of the present invention. For the heat sink 2 with a relatively narrow thickness, the partition can be set to one, and the number of oil passage chamber 5 and refrigerant chamber 6 can both be set to one. The thickness of oil passage chamber 5 and refrigerant chamber 6 is half the thickness of heat sink 2. Compared with a larger number of oil passage chambers 5 and refrigerant chambers 6, the structure of a single oil passage chamber 5 and refrigerant chamber 6 is simpler and easier for those skilled in the art to design and implement.

[0030] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the protection scope of this utility model.

Claims

1. A corrugated heat sink for an oil-immersed transformer, comprising a heat sink (2) having an internal receiving space (1), wherein the heat sink (2) is provided with an oil inlet (3) and an oil outlet (4), characterized in that: The accommodating space (1) includes an independent oil passage chamber (5) and a refrigerant chamber (6). The oil passage chamber (5) has an oil inlet (3) and an oil outlet (4). The heat sink (2) is also provided with a refrigerant inlet (7) and a refrigerant outlet (8). Both the refrigerant inlet (7) and the refrigerant outlet (8) are connected to the refrigerant chamber (6).

2. The corrugated heat sink for an oil-immersed transformer according to claim 1, characterized in that: The oil passage (5) and refrigerant passage (6) can be arranged along the length of the heat sink (2).

3. The corrugated heat sink for an oil-immersed transformer according to claim 1, characterized in that: The oil passage (5) and refrigerant passage (6) can be arranged along the thickness direction of the heat sink (2).

4. A corrugated heat sink for an oil-immersed transformer according to any one of claims 1-3, characterized in that: There are multiple oil passage chambers (5) and refrigerant chambers (6), and the multiple oil passage chambers (5) and refrigerant chambers (6) are arranged alternately.

5. A corrugated heat sink for an oil-immersed transformer according to claim 4, characterized in that: Multiple oil passage chambers (5) share an oil inlet (3) as an input port, and multiple oil passage chambers (5) share an oil outlet (4) as an output port.

6. The corrugated heat sink for an oil-immersed transformer according to claim 4, characterized in that: Each of the refrigerant chambers (6) has a refrigerant inlet (7) and a refrigerant outlet (8) connected to it.

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