JPH0443618A - Electromagnetic induction machine - Google Patents

Abstract

PURPOSE:To omit piping connecting a vessel and a heat exchanger, and ensure floor area on the upper part of the vessel sufficient to install the heat exchanger, by constituting a heat dissipating pipe of the heat exchanger installed on the upper part of the vessel, of a first and a second heat dissipating pipes, which are connected with the vessel. CONSTITUTION:In a cooling equipment, cooling medium 6 at the lower end portion of a winding 5 cools the winding 5 and is heated at the upper end portion of the winding 5. Said medium is guided to a lower piping 25A through an outlet piping 8 of the vessel 1 and an inlet piping 22 of a heat exchanger 21, branched into a first heat dissipating pipe 21A, and ascends. Said medium is cooled as the result of heat exchange for the outside air 16 flowing in parallel to said medium, and collected in an upper piping 24. After that, said medium horizontally flows in the upper piping 24, and is branched into a second heat dissipating piping 21B. Then said medium descends and becomes a flow opposite to the outside air 16. While exchanging heat with the outside air 16, the flow is again combined and cooled at a lower piping 25B. The combined flow passes through an outlet piping 23 and an inlet piping 9, descends through a gap formed by a diaphragm 7, and returns the lower end portion of the winding 5. Thereby the heat dissipation area of the heat exchanger 21 can be remarkably increased, and the floor area can be decreased when the height is kept equal compared with the conventional equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to electromagnetic induction equipment, such as a transformer, and particularly to a cooling structure thereof.

[Conventional technology]

A transformer will be explained as a representative example of an electromagnetic induction device. Conventionally, there has been a transformer of this type as shown in FIG. In the figure, (1) is the iron core, and (2) is this iron core (1
), (3) is the iron core (1).

A container for storing the winding (2) and the cooling medium (14), (
4) is a base attached to the lower part of the container, and (5) is a partition wall attached to the side of the container that separates the upward flow and downward flow of the cooling medium (14). (6) is the outlet pipe through which the cooling medium (14) exits from the container (3), and (7) is the container (
(9) is the inlet pipe into which the cooling medium (14) flows into (3), and each has a flange.
The heat exchanger (10) is installed on the top of the heat exchanger (
9) is the upper pipe, (11) is the lower pipe of the heat exchanger (9), and (9a) is the heat radiation pipe. (12) is an inlet pipe through which the cooling medium [14] flows into the heat exchanger (9) attached to the upper pipe (10), and the pipe (8) is connected to the outlet pipe (6) of the container (3). It is connected. (
13) is an outlet pipe through which the cooling medium flows out from the heat exchanger attached to the lower pipe (11). (15) is outside air, and the dashed-dotted arrow indicates the flow direction of outside air (15). The flow of the enclosed cooling medium (14) is indicated by solid arrows in the figure.

Next, the operation will be explained. When a voltage is applied to the transformer and a load is applied, heat is generated from the iron core (1) and winding (2). Since most of the amount of heat generated by a transformer is generated from one normal winding (2), the amount of heat generated from the iron core (1) will be ignored for convenience in explanation.

First, the lower end of the 9th winding (2) (height from the bottom of the container is on)
When the temperature of the cooling medium at The temperature of the cooling medium that cools the wire (2) and is placed at its upper end (height 82 from the bottom of the container) is θ.

becomes. Next, the cooling medium (14) heated to temperature σ2
is led to the inlet pipe (12) of the heat exchanger (height H4 from the bottom of the container) through the outlet pipe (6) of the container, the pipe (8) to the heat exchanger, and then the upper pipe of the heat exchanger. (10)
It is guided through the heat radiation pipe (9a), and while descending through the heat radiation pipe (9a), it exchanges heat with the outside air (15) and is cooled from 9 degrees θ2 to the temperature (θ, ). The cooling medium (I4) cooled to the temperature θ1 passes through the lower pipe (11) (height H5 from the bottom of the container) and the outlet pipe (13) of the heat exchanger.

It is led to the inlet pipe (7) of the container, further descends through the gap formed by the side wall and partition wall (5) in the container (3), and returns to the lower end of the winding (2) in the container (3). . FIG. 6 shows the temperature of the cooling medium thus circulated and its positional relationship in the height direction.

That is, the cooling medium (14) is at point A (temperature θ1. height H
+) along the arrow in the figure to point B (temperature θ2. height H2)
.

It flows in a cycle that circulates around the sides of the quadrilateral formed by point C (temperature θ2, height 84) and point D (and θ1° height 113).

[Problem to be solved by the invention]

Since the conventional transformer is configured as described above, a pipe (8) that connects the container outlet pipe (6) and the heat exchanger inlet pipe (12) is required. In addition, the piping (8) is usually composed of a circular or rectangular tube, and although its outer surface area is small and no heat dissipation effect can be expected, it occupies a large installation floor space in the upper part of the container (3), and the heat exchanger (9) The floor space for installation was reduced. For this reason, a heat exchanger (
In order to obtain 9), it is necessary to increase the height dimension, which has the disadvantage of increasing the size of the transformer as a whole.

This invention was made to solve the above-mentioned problems, and it is possible to omit the piping that connects the container outlet piping and the heat exchanger inlet piping, and to obtain sufficient floor space for installing the heat exchanger on the upper part of the container. The purpose is to provide electromagnetic induction equipment that can

[Means to solve the problem]

The electromagnetic induction device according to the present invention includes a heat exchanger that houses the heating element of the electromagnetic induction device in a container, circulates a cooling medium sealed inside the container, and cools the cooling medium by heat exchange with outside air. The heat exchanger is located in the upper part of the container, and the enclosed cooling medium and the outside air flow through one part of the heat exchanger in parallel flow, and the enclosed cooling medium passes inside the remaining part of the heat exchanger. The heat exchanger is configured so that the medium and the outside air flow in opposite directions.

[Effect]

The heat exchanger installed at the top of the container of the electromagnetic induction equipment of the present invention has a heat exchanger itself that constitutes the flow path for the upward and downward flows of the cooling medium sealed inside the container. Required vessel outlet piping (6) and heat exchanger inlet piping (12)
There is no need for piping (8) constituting a rising flow path for the refrigerant that communicates with the refrigerant. In addition, since the ascending flow path of the electromagnetic induction device of the present invention is constituted by the heat exchanger as described above, its surface area is large, and while the cooling medium rises inside the heat exchanger, the outside air flows in parallel with it. Conventional piping (8
) can be effectively used as floor space for a heat exchanger.

〔Example〕

Hereinafter, a transformer according to an eleventh embodiment of the present invention will be explained based on the drawings. In FIG. 1, the iron core (1).

Winding wire (2), container (3), base (4), partition wall (5),
Outlet piping (6), inlet piping (7), enclosed cooling medium (14)
).

The outside air (15) is similar to that in FIG.

(21) is a heat exchanger placed on the top of the container (3).
2) is its inlet pipe, and (23) is its outlet pipe.

(21a) is a heat dissipation pipe, (24) is an upper pipe that gathers the heat dissipation pipes at the top, and (25) is the same (heat dissipation pipe (21)
This is the lower piping that collects a) at the lower part. (26) is a blocking wall installed in the lower piping, and the enclosed cooling medium (14
) blocks horizontal movement within the lower pipe (25) from the inlet pipe (22) toward the outlet pipe (23). Both the inlet pipe (22) and outlet pipe (23) of the heat exchanger (21) are attached to the lower pipe (25), and these are connected to the outlet pipe (6) and inlet pipe (7) of the container (3), respectively. connected.

A cooling medium (14) is sealed inside the container (3) and the heat exchanger (21).
) will be distributed.

Next, the cooling effect of the transformer in one embodiment of the present invention configured as described above will be explained.

First, as in the conventional case, if the temperature of the cooling medium at the lower end of the winding (2) (height H from the bottom of the container) is 01, then
The cooling medium (14) passes through a passage (not shown) provided in the winding (2), absorbs the amount of heat generated from the ninth winding (2), cools the first winding (2), and cools the first winding (2). The temperature at the point (height 82 from the bottom of the container) is θ2.Then, the cooling medium (14) heated to the temperature θ2 is passed through the outlet pipe (6) of the container and the inlet pipe (3) of the heat exchanger (3). 22) through the lower piping (2
5) (height H3 from the bottom of the container), where it is divided into the heat dissipation pipe (21a) and rises, and the enclosed cooling medium (14
) is cooled from temperature θ2 to temperature θ3 by exchanging heat with the outside air (15) flowing in parallel with the air (
height H4) from the bottom of the container. Inside the lower piping (25), there is a shield plate to prevent the cooling medium from flowing horizontally in the lower piping (25) from the input pipe (22) to the outlet piping (23) of the heat exchanger (21). (26), all of the cooling medium (14) that flows through the inlet pipe (22) and is diverted from the lower pipe (25) passes through the heat dissipation pipe (21a) to the -L section pipe (24). flows. The cooling medium (14) that has flowed into the upper pipe (24) flows horizontally and passes through the blocking plate (
2G) from the position where it passes through the upper pipe (24) opposite to the installed position, the flow is divided into each heat sink (21a) and becomes a downward flow, and it becomes a counterflow to the outside air (15), and the outside air (
15) while exchanging heat with the lower pipe (25) (height H3 from the bottom of the container). At this time, the temperature of the cooling medium (14) is cooled from θ3 to 01. Then, the cooling medium (14) cooled to the temperature θ1 is transferred to the heat exchanger (
21) outlet piping (23), and the inlet piping (7) of the container (3).
), passes through a space formed by the side wall of the container (3) and a partition wall (5) provided in the container, and returns to the lower end of the winding (2) in the container (3). The relationship between the temperature of the cooling medium (14) circulating in this way and the height at that position is determined by the second
As shown in the figure. That is, the cooling medium (14) is at point A (height 1
11. From temperature θ1) to point B (height H) along the arrow in the figure
2. Temperature θ2) Flows to 1 point B' (height Hs, temperature θ2), where it branches into the heat radiation tube (21a) and rises, merges at 1 point C (height H4, temperature θ3), and returns again. Heat dissipation tube (21
a) Divides into the interior and descends to 1 point D (height H3°, temperature θ1)
They form a circular cycle similar to a conventional electromagnetic induction S machine, where they merge again at point A and return to point A.

However, in the case of the electromagnetic induction device according to the present invention (9), the function equivalent to the conventional piping (8) is configured with the heat radiation pipe (21a) of the heat exchanger (21), so the floor area and height of the heat exchanger are the same. If it is closed, the heat radiation area of the heat exchanger can be greatly increased. In other words, when the allowable temperature rise of the equipment is the same, the heat radiation area of the heat exchanger may be the same.1 The electromagnetic induction equipment of the present invention can have a smaller floor space than the conventional product when the height is the same. In addition, if the floor area is the same, the height can be lowered, and a compact electromagnetic induction device can be used.

Next, a transformer according to another embodiment of the present invention will be explained based on FIG. (1) to (6), (14), and (15) are the same products and have the same functions as the conventional example, and their explanation will be omitted. (31) is an inlet pipe for the cooling medium (14) provided at the bottom of the container. (35) is a heat exchanger A provided at the -L section of the container (3), and (40) is a heat exchanger B provided on the side surface of the container (3). (32) is heat exchanger A (
35) is the inlet pipe, (33) is the lower pipe, (34)
(35a) is an upper pipe, and (35a) is a heat dissipation pipe. Heat dissipation tube (35
The lower ends of a) are collected by the lower pipe (33), and the upper ends of the heat radiation pipes (35a) are collected by the upper pipe (34). (36) is the outlet piping to the heat exchanger. (39
) is the inlet pipe of heat exchanger B, and heat exchanger A (35
) is connected to and communicates with the outlet pipe (36). (37
) is the upper pipe of heat exchanger B, (38) is also the lower pipe, (40a) is the heat radiation pipe of heat exchanger B,
The upper end is connected to the upper pipe (37), and the lower end is connected to the lower pipe (38).
).

Next, the effect will be explained. Also in the present invention.

Cooling medium at the lower end of the winding (height HI from the lower end of the container).

The temperature θ1) absorbs the heat generated from the winding through a passage in the winding (2) and reaches the upper end of the winding (height H2 from the lower end of the container, temperature θ2). Next, the outlet piping (6) of the container (3),
The lower pipe (3) passes through the 1 pipe (32) containing heat exchanger A.
3) It flows horizontally (height H3 from the bottom of the container), branches into each heat radiation pipe (35a), and rises. During this time, heat exchange is performed while flowing parallel to the outside air, lowering the temperature from 02 to 03, and the air is merged with the upper pipe (34) (height H from the bottom of the container).
4). Each heat dissipation pipe (4
0a), becomes a downward flow, and while descending inside the heat dissipation pipe (40a), it exchanges heat with the outside air which is an opposite flow, lowering the temperature from 03 to 01, and returns to the lower pipe (38). They merge (height from the bottom of the container, temperature θ1).

After that, the outlet pipe (4], ), the lower inlet pipe of the container (31)
) and return to the lower end of the winding. FIG. 4 shows the relationship between the temperature of the cooling medium (14) circulating in this manner and the height at that position. In the present invention, the heat exchanger (A) provided at the upper part of the container (3) has a cooling medium (14) flowing in parallel with the outside air inside the heat exchanger (A).
It has a function equivalent to 8) and also functions as a heat exchanger. In the heat exchanger (B) (40), the cooling medium (14) flows downward and outside air (15) flows through the heat exchanger (B) (40).
) is the same as the heat exchanger (9) of conventional electromagnetic induction equipment in that it passes a countercurrent flow, but it is placed on the side of the container (3), and its manifold piping is connected to the upper end of heat exchanger A. Outlet piping provided (
36), and its outlet pipe is connected to the inlet pipe (31) at the lower end of the container. For this reason, heat exchanger B (
40) can use a long heat dissipation tube (40a), so it has the advantage of being able to obtain a large heat dissipation area with a small floor area. Another advantage is that the partition wall (5) inside the tank can also be eliminated.

〔Effect of the invention〕

As described above, according to the present invention, all or a part of the heat exchanger is disposed in the upper part of the container, and one of the heat radiation tubes in the heat exchanger is
The heat exchanger is constructed in such a way that the enclosed cooling medium and outside air flow in parallel through the heat dissipation tubes in the heat exchanger, and the enclosed cooling medium and outside air flow in countercurrent flow through the heat dissipation tubes in the remaining portion of the heat exchanger. It is possible to obtain a heat exchanger with a large heat dissipation area without the need for piping to connect the heated container and the piping containing the heat exchanger, which has the effect of making the device more compact and inexpensive.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1(a) is a sectional side view showing a transformer according to an embodiment of the present invention, and FIG. 1(b) is a partial plan view. Fig. 2 is an explanatory diagram showing the circulation of the enclosed cooling medium, Fig. 3 is a cross-sectional side view showing another embodiment of the present invention, and Fig. 4 is an explanatory diagram showing the circulation of the enclosed cooling medium in the configuration of Fig. 3. It is. Figure 5(a) is a cross-sectional side view showing a conventional transformer.
b) is a partial plan view, and FIG. 6 is an explanatory diagram showing the circulation of the enclosed cooling medium in the configuration of FIG. 5.

Claims (3)

[Claims] (1) A heat exchanger that houses the heating element of an electromagnetic device in a container, circulates a cooling medium sealed inside the container, and cools the cooling medium by exchanging heat with the outside air. The heat exchanger is located in the upper part of the container, and the enclosed cooling medium and outside air flow in parallel through one part of the heat dissipation tube in the heat exchanger, and the enclosed cooling medium passes inside the heat dissipation tube in the remaining part of the heat exchanger. An electromagnetic induction device characterized by a heat exchanger configured so that the cooling medium and outside air flow in opposite directions. (2) The heat exchanger is characterized in that the part where the internally sealed cooling medium flows in parallel with the outside air is located at the top of the container, and the part where the internally sealed cooling medium flows in a countercurrent flow with the outside air is located on the side of the container. An electromagnetic induction device according to claim 1. (3) The scope of the patent characterized in that the inlet to the heat exchanger for the cooling medium sealed in the container is communicated with the upper part of the container, and the outlet from the heat exchanger for the cooling medium sealed in the container is communicated with the lower part of the container. Electromagnetic induction equipment as set forth in paragraphs 1 and 2, item 1.