KR101636384B1 - Radiator for transformer - Google Patents

Abstract

The present invention relates to a radiator for a transformer. The transformer of the present invention includes an upper header pipe 10 connected to the upper portion of the enclosure of the transformer main body, a plurality of heat sinks 20 connected in turn to the upper header pipe 10 to receive the insulating oil, A lower header pipe 10 'for returning the insulating oil, which has flowed out to the outside air, to the inside of the enclosure, and a bridge (not shown) installed in the air flow path 22 formed between the heat radiating plate 20, There is a pin 30. The bridge pin 30 is made of a material having good thermal conductivity. The bridge pin 30 has first and second attachment portions 31 and 32 alternately arranged in contact with the outer surface of the heat sink 20, And a connecting portion 33 for connecting between the two attachment portions 31 and 32. A through hole (35) is formed in the connection part (33) so that air can pass through. According to the present invention, there is an advantage that the temperature difference between the heat sinks 30 is reduced and the heat exchange efficiency is increased.

Description

{Radiator for transformer}

The present invention relates to a heat spreader for a transformer, and more particularly, to a heat spreader for a transformer having a heat radiating bridge for generating heat transfer between heat sinks of a heat radiator and generating turbulent flow of air.

Transformers serve to increase or decrease the voltage, which is an important component of the power system. Such a transformer is very important for the stable supply of electric power. When converting a voltage from a transformer, heat is generated by the magnetism of the current, which causes a temperature rise of the dielectric oil inside the transformer's enclosure. When the temperature of the insulating oil rises, the internal pressure of the transformer rises as well, causing an explosion of the transformer due to overheating and pressure rise, and the insulating oil is deteriorated to cause insulation damage.

To solve these problems, a radiator is installed outside the transformer, and the heat generated in the transformer and transferred by the insulating oil is discharged 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 lower temperature is returned to the inside of the transformer for heat radiation.

Fig. 1 shows a configuration of a transformer generally used. According to the configuration, the outer casing 3 of the transformer main body 1 is constituted by an outer casing 3, and a coil is wound around the core to transform the inner casing 3, and the casing 3 is filled with insulating oil have.

A radiator (5) is connected to one side of the transformer main body (1) to discharge heat generated inside the transformer main body (1) to the outside. The insulating oil in the enclosure 3 flows into the radiator 5 to discharge heat to the outside.

The radiator 5 has an upper header pipe 7 communicating with the inside of the enclosure 3 through an upper portion of the transformer main body 1 and a lower header pipe 7 communicating with the inside of the enclosure 3 through the lower portion of the transformer main body 1, And a lower header pipe 7 'communicating with the lower header pipe 7'. A plurality of heat sinks 9 are provided between the header pipes 7 and 7 '. The heat dissipation plate 9 is formed by combining two panels to form a space through which the insulation 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 '

An insulating oil is supplied from the outer header pipe 7 through the upper header pipe 7 and an insulating oil is supplied into the heat radiating plate 9 from the upper header pipe 7, Lt; / RTI > The insulating oil having passed through the heat sink 9 is transmitted to the inner box 3 again through the lower header pipe 7 'to perform insulation.

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

Since the insulating fluid is sequentially supplied to the respective heat radiating plates 9 according to the position of the heat radiating plate 9 rather than supplying the insulating oil at the same time through the upper header pipe 7, A relatively larger amount of insulating oil is transferred to the heat sink 9 connected to the upstream side of the heat sink 9. This means that a relatively large amount of heat is transferred to the corresponding heat sink 9.

Also, even in one heat sink 9, the insulating oil does not flow all over the flow cross sectional area of the flow passage but flows into a part of the area. For this reason, even in one heat sink 9, a large temperature difference occurs 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 higher in temperature than the other heat sink 9. That is, the surface temperatures of the entire heat sinks 9 are different from each other, and the temperatures of the heat sinks 9 are different depending on their positions. Such unevenness of the temperature has a problem in that heat exchange efficiency with the outside air is lowered.

Korean Patent No. 10-1384568 Korean Patent No. 10-1374979

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art, and to solve the temperature unevenness between the heat sinks used in the heat radiator of the transformer.

Another object of the present invention is to solve the temperature unevenness in the heat sink used in the heat radiator of the transformer.

According to an aspect of the present invention, there is provided a heat spreader for a transformer that transfers heat of insulating oil inside an enclosure of a transformer body to outside air, the heat radiator being connected to the enclosure, A heat pipe connected to the heat radiating plate and flowing heat in the heat radiating plate to discharge the heat insulating oil into the inside of the enclosure; And a connection portion connecting the first attachment portion and the second attachment portion to each other and connecting the first attachment portion and the second attachment portion to each other is provided on the outer surface of the heat sink adjacent to the air flow path formed between the heat sink and the lower header pipe. And a bridge pin for heat-exchanging with the outside air, wherein the bridge pin is connected to the first attachment portion and the second attachment portion Extended surface of a virtual connection are in parallel with each other is inclined with the connection to the first attaching portion and second attaching portion is formed to pass through the ball, the air passes through the connecting portion.

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A through-hole is formed in the first and second attachment portions of the bridge pin so that the outer surface of the heat sink is exposed to air in the air flow path.

The bridge pin has a predetermined width and extends in a height direction of the heat radiating plate, and a plurality of bridge pins having a predetermined width are disposed in one air channel.

The plurality of bridge pins are arranged such that the first attachment portions of the first attachment portions, the second attachment portion of the second attachment portions, and the connection portions of the bridge pieces are aligned in parallel with each other.

The plurality of bridging pins disposed adjacent to each other are arranged such that the connection portions of the adjacent bridging pins are shifted from each other, and the first mounting portions and the second mounting portions are arranged adjacently to each other in a part of a section.

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

In the present invention, bridge pins are provided between the heat sinks constituting the heat radiator. Since the bridge pins are configured to contact the surfaces of the adjacent heat sinks to transmit heat, heat can be transferred between the heat sinks, thereby eliminating temperature variations between the heat sinks. As a result, The effect can be obtained.

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

1 is a schematic perspective view showing the construction of a transformer having a radiator according to a related art.
2 is a perspective view showing a configuration of a preferred embodiment of a radiator according to the present invention;
3 is a side view showing the configuration of an embodiment of the present invention.
4 is a perspective view showing a configuration of a 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 with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

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 intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

5, the heat radiator of the present invention includes an upper header pipe 10, a lower header pipe 10 ', a heat sink 20, and a bridge pin 30. As shown in FIG.

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

The lower header pipe 10 'is connected to the heat radiating plate 20 on the opposite side of the upper header pipe 10. The lower header pipe 10 'functions to return the insulating oil, which has passed through the inside of the heat sink 20 and has released heat, to the enclosure.

The heat dissipation plate 20 is structured such that insulating oil flows in a flow path (not shown) formed therein. The insulating oil flows through the inside of the heat sink 20 and performs heat exchange with the external air contacting the external surface of the heat sink 20. The heat dissipation plate 20 is formed by, for example, joining two plates in a state in which they are spaced apart from each other at a predetermined interval, thereby allowing the insulation oil to flow through the gap.

The heat radiating plate 20 is installed between the upper header pipe 10 and the lower header pipe 10 'to receive the insulating oil and discharge heat to the outside air. A plurality of the heat sinks 20 are disposed at predetermined intervals. The gap becomes the air flow path 22 through which the air flows between the heat sinks 20. Air can be flowed through natural convection through the air flow path (22). Of course, a fan (not shown) may be provided to force air to flow through the air passage 22.

Meanwhile, the air flow path 22 is provided with the bridge pin 30. The primary role of the bridge pin 30 is to perform heat exchange within the air flow path 22. The bridge pin 30 is formed by processing a metal plate, and is elongated in a substantially strip-like shape.

The bridge pin (30) transfers heat between adjacent heat sinks (20). Of course, the bridge pin 30 may also transfer heat between one heat sink 20. Which may vary depending on the temperature distribution on the outer surface of the heat sink 20. [ That is, the heat is transferred from the region where the temperature of one heat sink 20 is high to the region where the temperature is low through the bridge pin 30.

The configuration of the bridge pin 30 is well illustrated in FIG. The air flow path 22 formed between the heat radiating plates 20 is formed to be long in the height direction of the heat radiating plate 20. Therefore, the bridge pin 30 is also made to repeat the same shape in one direction.

The bridge pin (30) has a first attachment portion (31) and a second attachment portion (32) which are in close contact with the surface of the heat sink (20). The first attachment portion 31 and the second attachment portion 32 are alternately arranged in the extending direction of the bridge pin 30. The first attachment portion 31 and the second attachment portion 32 are formed in a virtual So that they do not meet each other. The vertical distance on 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 this embodiment, penetration portions 31 'and 32' are formed in the first attachment portion 31 and the second attachment portion 32, respectively. The penetration portions 31 'and 32' are formed in the first and second attachment portions 31 and 32 so that heat can be easily transmitted to the air from the surface of the heat dissipation plate 20. It is preferable that the areas of the penetrating portions 31 'and 32' are as wide as possible within a range that does not affect the strength of the attaching portions 31 and 32.

A connecting portion (33) is provided between the first attaching portion (31) and the second attaching portion (32). The connecting portion 33 extends obliquely with respect to the direction in which the bridge pin 30 extends. The connection portion 33 connects the first and second attachment portions 31 and 32 to transfer heat between adjacent heat dissipation plates 20. [

A 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 the air flows in the extending direction of the bridge pin 30 by the fan. If air flows in a direction perpendicular to the extending direction of the bridge pin 30, it is not necessarily required. However, even in this case, the air flow in the direction may be required, so that the through hole 35 can be formed in the connecting portion 33. If the area occupied by the through hole 35 is relatively wide at the entire connecting portion 33, the heat transfer between the heat sinks 20 may be relatively less. The formation and the area of the through hole 35 of the connection portion 33 may be varied depending on the use condition of the radiator.

In the illustrated embodiment, the width of the bridge pin 30 is much narrower than the width of the heat sink 20 so that the through hole 35 of the connection portion 33 is two rows and three columns. However, 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 can be varied.

Meanwhile, the bridge pin 30 is inserted and fixed between the heat sinks 20. So that the first and second mounting portions 31 and 32 of the bridge pin 30 are brought into close contact with the adjacent heat sinks 20 so that both end portions of the bridge pin 30 are fixed to the heat sink 20, . The end of the bridge pin 30 may be fixed in various ways. For example, a clip or the like may be used or fixed by welding.

A plurality of the bridge pins 30 may be installed in the air flow path 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 attaching portion 31 has the first attaching portions 31, the connecting portion 33 has the connecting portions 33, and the second attaching portion 32 has the second attaching portions 32 positioned at the same position . Such a state can be seen in FIG.

5, the first attaching portion 31, the second attaching portion 32, and the connecting portion 33 are arranged side by side rather than side by side. 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 , And the connecting portion (33) is located at a different position from that of the adjacent bridge pin (30). Such a structure is advantageous for generating turbulence when air is blown by the fan to the air flow path 22 from the side surface of the radiator.

In the radiator of the present invention, a fan (not shown) for allowing air to flow in the air flow path 22 in a direction perpendicular to the extending direction of the bridge pin 30, A fan can be installed to allow air to flow through the air outlet. That is, a fan attached to the side surface of the radiator to form an air flow in the horizontal direction along the air flow path 22, or a fan for allowing air to flow upward from the lower part of the radiator.

Hereinafter, the use of the radiator for a transformer according to the present invention will be described in detail.

In the radiator heat exchanger, the insulating oil filled in the outer casing of the transformer body is transferred to heat exchange with the outside air, and the heat generated from the transformer body is discharged to the outside. That is, when the temperature of the insulating oil increases due to the heat generated in the transformer body, the density of the insulating oil whose temperature rises is lowered, and is transferred to the upper header pipe 10 from the inside of the enclosure.

The insulating fluid transferred to the upper header pipe 10 is sequentially transmitted to the plurality of heat sinks 20 connected in turn to the upper header pipe 10. In the interior of the heat sink 20, heat is transferred from the top to the bottom of the heat sink 20, and heat is transferred to the surface of the heat sink 20.

The insulating oil delivered from the inside of the heat sink 20 to the lower portion is transmitted to the inside of the enclosure through the lower header pipe 10 '. The insulating oil transmitted to the lower header pipe 10 'transfers heat to the outside air to be in a low temperature state, and receives heat in the inside of the enclosure and flows along the path described above to perform a heat radiating function.

Heat from the insulating oil flowing in the heat sink 20 is transferred to the heat sink 20 and heat is transferred to the external air contacting the outer surface of the heat sink 20. The bridge pin 30 is connected to the heat sink 20, (20) to the air flowing through the air passage (22).

The bridge pin 30 also serves to transfer heat to a region having a relatively low temperature in the heat sink 20. Since the heat is transferred from a high temperature to a low temperature, the heat sink 20 connected to each other by the bridge pin 30 transfers the heat to the low temperature region if the temperature is different. The role of such a bridge pin 30 is to make the temperature of the heat sinks 20 uniform throughout. Of course, although the temperature can not be uniform in all regions of the heat sink 20, the heat is relatively uniformly distributed, so that the heat exchange with the outside air is performed in a relatively large area.

Next, the bridge pin (30) causes turbulence in the flow of air flowing in the air channel (22). The through holes (35) of the bridge pin (30) generate turbulence while passing air, so that heat exchange is more likely to occur.

As shown in FIG. 5, when the bridge 33 is arranged in a staggered arrangement with the bridge pin 30, air flows in a direction perpendicular to the extending direction of the bridge pin 30, .

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

In this way, the bridge pin 30 causes turbulence in the air flowing through the air flow path 22 to heat-exchange well, and the bridge pin 30 contacts the air directly in the air flow path 22, It also plays a role.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: upper header pipe 10 ': lower header pipe
20: heat sink 22: air passage
30: bridge pin 31: first attachment portion
31 ': penetrating part 32: second attachment part
32 ': penetrating part 33: connection part
35: Through ball

Claims (6)

A heat spreader for a transformer, which transfers the heat of insulating oil inside an enclosure of a transformer body to outside air,
An upper header pipe connected to the enclosure and supplied with the insulating oil from the enclosure,
A plurality of heat exchangers connected in series to the upper header pipe to supply heat to the heat exchanger,
A lower header pipe connected to the heat radiating plate to return the heat insulating oil flowing into the heat radiating plate to the inside of the enclosure,
A first connecting portion and a second connecting portion are provided in contact with the outer surface of the heat sink adjacent to each other in the air flow path formed between the heat sinks and a connection portion connecting the first mounting portion and the second mounting portion is provided, Pins,
The bridging pin is formed such that the imaginary extension surfaces of the first attachment portion and the second attachment portion are parallel to each other, the connection portion is inclinedly connected to the first attachment portion and the second attachment portion, and the connection portion is formed with a through- A radiator for a transformer.

delete The radiator as set forth in claim 1, wherein a penetrating portion is formed in the first attachment portion and the second attachment portion of the bridge pin, so that an outer surface of the heat dissipation plate is exposed to the air in the air flow path.
The radiator according to claim 1 or 3, wherein the bridge pin has a predetermined width and extends in the height direction of the heat radiating plate, wherein a plurality of bridge pins having a predetermined width are arranged in one air channel.
The radiator according to claim 4, wherein the plurality of bridge pins are disposed so that the first mounting portions of the first mounting portions, the second mounting portions of the second mounting portions, and the connecting portions of the bridge pins are arranged so as to correspond to each other.
The radiator according to claim 4, wherein the plurality of bridging pins disposed adjacent to each other are arranged such that the connecting portions of the adjacent bridging pins are shifted from each other, and the first mounting portions and the second mounting portions are arranged in parallel with each other.

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