WO2016105085A1

WO2016105085A1 - Radiator for transformer

Info

Publication number: WO2016105085A1
Application number: PCT/KR2015/014097
Authority: WO
Inventors: 팽진기; 정승봉
Original assignee: 주식회사 효성
Priority date: 2014-12-22
Filing date: 2015-12-22
Publication date: 2016-06-30
Also published as: KR20160076403A; KR101636384B1

Abstract

The present invention relates to a radiator for a transformer. The radiator of the present invention comprises: an upper header pipe (10) connected to the upper portion of an enclosure of the transformer body; a plurality of radiating plates (20) connected to the upper header pipe (10) in sequence to receive an insulating oil; a lower header pipe (10') that returns the insulating oil, which has released heat to external air while flowing within the radiating plates (20), into the enclosure; and bridge pins (30) installed in air passages (22) formed between the radiating plates (20) to exchange heat with external air while making contact with the external air. The bridge pins (30) are formed of a material having a high heat transfer rate and include first and second attachment parts (31, 32) installed to make contact with the outer surfaces of the radiating plates (20) and a connecting part (33) that interconnects the first and second attachment parts (31, 32). The connecting part (33) has a through-hole (35) formed therein to allow air to pass through the through-hole. According to the present invention, it is possible to reduce a difference in temperature between the radiating plates (30), thereby enhancing the heat exchange efficiency.

Description

Radiator for transformer

The present invention relates to a radiator for a transformer, and more particularly, to a radiator for a transformer having a heat dissipation bridge that generates heat transfer between the heat sink of the radiator and generates turbulent flow of air.

The transformer acts to raise or lower the voltage and becomes an important component of the power system. Such a transformer is very important for the stable supply of power. When converting a voltage in a transformer, heat is generated by the magnetic action of the current, which causes a rise in the temperature of the insulating oil inside the transformer's enclosure. When the temperature of the insulating oil rises, the internal pressure of the transformer also rises, causing an explosion of the transformer due to overheating and pressure rise, and the insulating oil is deteriorated, resulting in insulation damage.

In order to solve this problem, the radiator is installed outside the transformer to discharge heat generated inside the transformer and transferred to the insulating oil through the radiator. That is, the insulating oil is sent to the radiator to discharge heat to the outside, and the insulating oil having a low temperature is sent to the inside of the transformer to radiate heat.

1 shows a configuration of a transformer that is generally used. According to this, the exterior of the transformer body (1) constitutes an enclosure (3), the inside of the enclosure (3) is coiled around the core to be transformed, and the enclosure (3) is filled with insulating oil have.

The radiator 5 is connected to one side of the outside of the transformer body 1 to dissipate heat generated inside the transformer body 1 to the outside. Insulating oil inside the enclosure 3 flows to the radiator 5 to discharge heat to the outside.

The radiator 5 has an upper header pipe 7 communicating with the interior of the enclosure 3 through the upper portion of the transformer body 1, and the interior of the enclosure 3 through the lower portion of the transformer body 1. There is a lower header pipe 7 'in communication with it. A plurality of heat sinks 9 are provided between these header pipes 7 and 7 '. The heat sink 9 is configured by combining two panels to form a space in which the insulating oil flows. An upper portion of the heat sink 9 is connected to the upper header pipe 7, and a lower portion of the heat sink 9 is connected to the lower header pipe 7 ′ so that insulating oil flows.

Insulating oil is supplied from the enclosure 3 through the upper header pipe 7, and insulating oil is supplied from the upper header pipe 7 to the inside of the heat sink 9 so as to be heated to the outside from the heat sink 9. Is released. The insulating oil passing through the heat sink 9 is transferred to the inner box 3 again through the lower header pipe 7 'to perform an insulating action.

However, the conventional radiator for a transformer as described above has the following problems.

First, the insulating oil is not supplied to each of the heat sinks 9 through the upper header pipe 7 at the same time, and the insulating oil is sequentially supplied according to the position of the heat sink 9 so that the upper header pipes 7 are relatively. Relatively more insulating oil is transferred to the heat sink 9 connected upstream of the heat sink. This means that a relatively large amount of heat is transferred to the corresponding heat sink 9.

In addition, even in one heat sink 9, the insulating oil often flows to a part of the region instead of evenly passing the entire flow cross-sectional area of the flow path. For this reason, even one heat sink 9 causes a lot of temperature difference depending on the position.

Therefore, in the heat exchange with the outside air on the surface of the heat sink 9, a specific region of the heat sink 9 may be relatively high in temperature compared to other heat sinks 9. That is, the surface temperature of all the heat sinks 9 differs, and the temperature of one heat sink 9 also changes with positions. Such nonuniformity of temperature has a problem of lowering heat exchange efficiency with external air.

An object of the present invention is to solve the conventional problems as described above, to solve the temperature irregularity between the heat sinks used in the heat sink of the transformer.

Another object of the present invention is to resolve the temperature irregularity in the heat sink used in the heat sink of the transformer.

According to a feature of the present invention for achieving the above object, the present invention is a transformer radiator for transmitting the heat of the insulating oil inside the enclosure of the transformer body to the outside air, it is connected to the enclosure to supply the insulating oil from the enclosure A plurality of upper header pipes and a plurality of upper header pipes are sequentially connected to the upper header pipes to receive the insulating oil and to exchange heat with external air, and the insulating oil connected to the heat sinks to dissipate heat while flowing inside the heat sink to the inside of the enclosure. A lower header pipe for returning and a first attachment portion and a second attachment portion are installed in contact with an outer surface of an adjacent heat sink in an air flow path formed between the heat sink and a connection portion for connecting between the first attachment portion and the second attachment portion. It includes a bridge pin for heat exchange with the outside air.

The bridge pin has an imaginary extension surface of the first attachment portion and the second attachment portion parallel to each other, and the connection portion is inclinedly connected to the first attachment portion and the second attachment portion, and a passage hole through which air passes is formed in the connection portion. do.

A through part is formed in the first attaching part and the second attaching part of the bridge fin so that the outer surface of the heat sink is exposed to the air in the air passage.

The bridge fin has a predetermined width and extends in the height direction of the heat sink, and a plurality of bridge fins having a predetermined width is disposed in one air passage.

The plurality of bridge pins are arranged side by side so that the first attachment portion, the first attachment portion, the second attachment portion, the second attachment portion, and the connection portion corresponding to each other.

The plurality of bridge pins are arranged in such a way that the connection portions of the adjacent ones are arranged to be offset from each other, and a part of the first attachment portions and the second attachment portions are arranged side by side.

In the radiator for transformer according to the present invention, the following effects can be obtained.

In the present invention, a bridge fin is installed between the heat sinks constituting the heat sink. Since the bridge fins are configured to transfer heat by contacting the surfaces of adjacent heat sinks, heat can be transferred between the heat sinks to resolve temperature irregularities between the heat sinks. You can get the effect.

The bridge fin used in the heat sink of the present invention is thermally connected to the heat sinks in a zigzag manner between adjacent heat sinks, and serves to transfer heat from a high place to a low place. Therefore, even one heat sink can transmit heat at a high temperature to a region having a relatively low temperature, so that heat exchange with outside air can be more smoothly obtained.

1 is a schematic perspective view showing the configuration of a transformer having a radiator according to the prior art;

Figure 2 is a perspective view showing the configuration of a preferred embodiment of the radiator according to the present invention.

Figure 3 is a side view showing the configuration of an embodiment of the present invention.

Figure 4 is a perspective view showing the configuration of the bridge pin constituting an embodiment of the present invention.

5 is an explanatory diagram showing another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiments of the present invention, if it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

2 to 5, the heat sink of the present invention includes an upper header pipe 10, a lower header pipe 10 ′, a heat sink 20, and a bridge fin 30.

The upper header pipe 10 communicates with the inside of the transformer body to transfer the insulating oil having a high temperature to the heat sink 20. The upper header pipe 10 is connected to the upper portion of the enclosure, and is connected to a plurality of heat sinks 20 at regular intervals in the longitudinal direction to transfer the insulating oil.

The lower header pipe 10 ′ is connected to the heat sink 20 opposite to the upper header pipe 10. The lower header pipe 10 'serves to return the insulating oil that has released heat while passing through the heat sink 20 to the enclosure.

The heat sink 20 is configured to allow the insulating oil to flow in the flow path (not shown) formed therein. The insulating oil flows through the inside of the heat sink 20 and exchanges heat with external air contacting the outer surface of the heat sink 20. In the configuration of the heat sink 20, for example, two plates are joined in a state of maintaining a constant interval, so that the gap becomes a flow path so that the insulating oil flows.

The heat dissipation plate 20 is installed between the upper header pipe 10 and the lower header pipe 10 'to receive insulation oil and to release heat to the outside air. The plurality of heat sinks 20 are arranged at predetermined intervals, respectively. The gap is an air flow path 22 through which air flows between the heat sinks 20. Through the air passage 22, air may flow through natural convection. Of course, a fan (not shown) may be installed to force air to flow through the air flow passage 22.

Meanwhile, the bridge pin 30 is installed in the air passage 22. The primary role of the bridge pin 30 is to perform heat exchange in the air passage 22. The bridge pin 30 is made by processing a metal plate and extends in a substantially band shape.

The bridge fins 30 transfer heat between adjacent heat sinks 20. Of course, the bridge fin 30 may also transfer heat between one heat sink 20. This may vary depending on the temperature distribution of the outer surface of the heat sink 20. That is, heat is transferred from the region of high temperature of one heat sink 20 to the region of low temperature through the bridge fin 30.

The configuration of the bridge pin 30 is shown well in FIG. The air flow passage 22 formed between the heat sinks 20 is formed long in the height direction of the heat sinks 20. Therefore, the bridge pin 30 is also made to repeat the same shape long in one direction.

The bridge fin 30 has a first attachment portion 31 and a second attachment portion 32 in close contact with the surface of the heat sink 20. The first attachment portion 31 and the second attachment portion 32 are alternately in the extending direction of the bridge pin 30, and the first attachment portion 31 and the second attachment portion 32 are virtual. The extending surfaces of are parallel to each other and do not meet. The vertical distance in the space between the first attachment portion 31 and the second attachment portion 32 is equal to the width of the air passage 22.

In the drawing of the present embodiment, the first attachment portion 31 and the second attachment portion 32 are formed with through portions 31 'and 32'. The through parts 31 ′ and 32 ′ are formed in the first attaching part 31 and the second attaching part 32 so that heat can be transferred to the air from the surface of the heat sink 20. The area of the through portions 31 ′ and 32 ′ may be as wide as possible without affecting the strength of the

attachment portions

31 and 32.

There is a connecting portion 33 between the first attachment portion 31 and the second attachment portion 32. The connection part 33 extends inclined with respect to the extending direction of the bridge pin 30. The connection part 33 connects the first attachment part 31 and the second attachment part 32 to transfer heat between adjacent heat sinks 20.

The through hole 35 is formed in the connection portion 33. The through hole 35 is not necessarily required. The through hole 35 is necessary when air flows in the extension direction of the bridge pin 30 by a fan. If the air flows in a direction orthogonal to the extension direction of the bridge pin 30 is not necessarily required. However, even in this case, since the air flow in the direction may be necessary, the through hole 35 may be formed in the connection part 33. When the area occupied by the through hole 35 is relatively large in the entire connecting portion 33, heat transfer between the heat sinks 20 may occur relatively less. Formation of the through hole 35 and the area of the connection portion 33 may vary depending on the conditions of use of the radiator.

And, in the illustrated embodiment, the width of the bridge fin 30 is very narrow compared to the width of the heat sink 20 so that the through hole 35 of the connecting portion 33 is two rows and three columns, the bridge The width of the fin 30 may be equal to the overall width of the heat sink 20. However, the width of the bridge pin 30 may be made in various ways.

On the other hand, the bridge fin 30 is sandwiched between the heat sink 20 is fixed. In the bridge fin 30, the first attachment portion 31 and the second attachment portion 32 are brought into close contact with the adjacent heat sink 20, and both ends of the bridge fin 30 are fixed to the heat sink 20 and the like. It is. There may be a variety of methods for fixing the end of the bridge pin 30, for example, it may be fixed using a welding, such as a clip.

In addition, a plurality of bridge fins 30 may be installed in the air flow passages 22 between the heat sinks 20. In this case, as shown in FIG. 4, adjacent bridge pins 30 may be installed side by side. That is, the first attachment portion 31 is located between the first attachment portions 31, the connection portion 33 is connected to the connection portions 33, and the second attachment portion 32 is positioned at the same position with each other. To be placed. This state can be seen in FIG. 3.

Next, in FIG. 5, the first attachment portion 31, the second attachment portion 32, and the connection portion 33 are arranged side by side without being aligned with each other. As can be seen in the right figure of FIG. 5, the first attachment portion 31 and the second attachment portion 32 are partially adjacent to the first attachment portion 31 and the second attachment portion 32, respectively. , The connecting portion 33 is that of the adjacent bridge pin 30 is in a different position. Such a structure is good for generating turbulence when blowing air to the air flow path 22 by the fan from the side of the radiator.

In the radiator of the present invention, a fan (not shown) or an extension direction of the bridge pin 30 to allow air to flow in a direction orthogonal to the extension direction of the bridge pin 30 in the air passage 22. The fan may be installed to allow the air to flow. That is, to install a fan attached to the side of the radiator to form a flow in the horizontal direction along the air flow path 22, or a fan to allow air to flow in the upper direction from the bottom of the radiator.

Hereinafter, the radiator for transformer according to the present invention having the configuration as described above is used in detail.

In the radiator for transformer, the insulating oil filled inside the transformer body is delivered to exchange heat with the outside air to discharge heat generated from the transformer body to the outside. In other words, when the temperature of the insulating oil rises due to heat generated inside the transformer body, the density of the insulating oil is increased while the temperature of the insulating oil rises, and moves upward from the inside of the enclosure, and is transferred to the upper header pipe 10.

The insulating oil transferred to the upper header pipe 10 is sequentially transferred to the plurality of heat sinks 20 connected to the upper header pipe 10 in sequence. In the heat sink 20, heat is transferred to the surface of the heat sink 20 while the insulating oil moves from top to bottom, and heat is transferred to air in contact with the surface of the heat sink 20.

The insulating oil transferred from the inside of the heat sink 20 to the bottom is transferred back to the inside of the enclosure through the lower header pipe 10 ′. The insulating oil delivered to the lower header pipe 10 ′ transfers heat to the outside air, whereby the temperature is lowered, and receives heat from the enclosure and flows along the above-described path to radiate heat.

On the other hand, heat is transferred from the insulating oil flowing inside the heat sink 20 to the heat sink 20, heat is transferred to the outside air in contact with the outer surface of the heat sink 20, the bridge fin 30 is the heat sink The heat received from 20 serves to transfer the air flow path 22 to the flowing air.

In addition, the bridge fin 30 also serves to transfer heat from the heat sink 20 to a relatively low temperature region. Since heat is transmitted from a high place to a low place, the heat sinks 20 connected to each other by the bridge fins 30 are transferred to a low temperature area if the area has a temperature difference. The role of the bridge fin 30 as described above allows the temperature of the heat sinks 20 to be uniform throughout. Of course, the temperature may not be uniform in all areas of the heat sink 20, but serves to distribute the heat relatively evenly so that heat exchange with external air is made in a relatively wide area.

Next, the bridge pin 30 causes turbulence in the flow of air flowing in the air flow passage 22. Passing holes 35 of the bridge pin 30 is to cause heat flow as the air passes through the heat exchange is to occur better.

By arranging the bridge pins 30 alternately as shown in FIG. 5, turbulence occurs in the flow of air when air flows in a direction orthogonal to the extending direction of the bridge pins 30. .

In addition, even when air flows in the extension direction of the bridge pin 30, the connecting portion 33 serves to generate turbulence in the flow of air. As air passes through the passage hole 35 of the connecting portion 33, turbulence is generated.

In this way, the bridge pin 30 is a turbulent flow is formed in the air flowing through the air flow path 22 to facilitate heat exchange, and in direct contact with the air in the air flow path 22 to transfer heat to the outside air It also plays a role.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

In the radiator for transformer that transfers the heat of the insulating oil inside the enclosure of the transformer body to the outside air,

An upper header pipe connected to the enclosure to receive insulating oil from the enclosure,

A plurality of heat sinks connected to the upper header pipe in sequence to receive insulating oil, and to exchange heat with external air;

A lower header pipe connected to the heat sink and returning the insulating oil that discharges heat while flowing inside the heat sink, to the inside of the enclosure;

Bridge pins are provided on the outer surface of adjacent heat sinks in contact with the air flow path between the first heat sinks and the second attaching parts and are connected to each other to connect the first and second attachment parts. Radiator for transformer comprising a.
The method of claim 1, wherein the bridge pin has a virtual extension surface of the first attachment portion and the second attachment portion parallel to each other and the connecting portion is inclinedly connected to the first attachment portion and the second attachment portion, the connection portion is air Radiator for transformers through which the through-holes are formed.
3. The transformer radiator of claim 2, wherein a through part is formed in the first attaching part and the second attaching part of the bridge fin so that the outer surface of the heat sink is exposed to air in the air passage.
The transformer radiator according to any one of claims 1 to 3, wherein the bridge fin has a predetermined width and extends in the height direction of the heat sink, and a plurality of bridge fins having a predetermined width are disposed in one air passage. .
5. The radiator for a transformer according to claim 4, wherein the bridge pins arranged in plurality are arranged side by side so that the first attachment part is arranged between the first attachment parts, the second attachment part is between the second attachment parts, and the connection part is connected to each other.
The transformer radiator according to claim 4, wherein the bridge fins arranged in plurality are arranged so that the connection portions of the adjacent ones are disposed to be offset from each other, and a portion of the first attachment portions and the second attachment portions are arranged side by side.