JPH04216605A - Forced-air-cooling structure for reactor - Google Patents

Abstract

PURPOSE:To enable the title compact reactor accompanied by low noise to be manufactured by a method wherein, in order to cool the reactor used for semiconductor device, etc., with forced air, the title forced-air-cooling structure capable of effectively using a cooling air by a compact blower is adopted. CONSTITUTION:A cylindrical ventilating guide 13 is arranged along the outer periphery of the coil part of a reactor 3 while a gap 14 is made between the guide 13 and the outermost coil part 5c. Through these procedures, the cooling air can be blown from an air inlet 9 by a blower 2 so that the outer periphery of the coil part 5 may be evenly cooled down.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind cooling structure for a reactor used in semiconductor devices and the like.

0002

[Prior Art] Dry static induction devices such as reactors and transformers are sometimes installed together with other devices in devices such as semiconductor devices.
Forced air cooling is sometimes used to reduce weight and size.

FIG. 3 is a partial cross-sectional side view of a conventional wind cooling structure of this type of reactor. In the figure (1)
indicates a housing such as a cubicle, and this housing (1)
A blower (2) is installed above the housing (1) for forced cooling. Further, a reactor (3) is provided within the casing (1). This reactor (3)
has an iron core part (4) extending vertically in the center, and a three-layer coil part (5) around the iron core part (4).
have. And between the iron core part (4) and the coil part (5a) of the first layer from the inside, and the coil part (5a) of each layer,
Gaps (6a), (6b), and (6c) are formed between (5b) and (5c) for cooling the iron core portion (4) and coil portion (5), respectively. Furthermore, a wind shielding plate (7) extending to the inner wall of the housing (1) is provided on the outer periphery of the outermost coil part (5c), and the outermost coil part (5c) and the wind shielding plate (7) are connected to each other. A gap (8) is formed therebetween. There is a wind inlet (9) on the lower side of the housing (1).
), and cooling air (10) is introduced into the housing (1) from this air inlet (9). In addition, (11), (12)
indicate the spaces above and below the housing (1) divided by the wind shielding plate (7).

In the device configured as described above, when the blower (2) is operated, the cooling air (10) is passed through the air inlet (
Air is sucked from 9) and guided to gaps (6a), (6b), (6c) for cooling the iron core part (4) and the coil parts (5a), (5b), (5c) of each layer,
It is also guided to the gap (8) between the wind shield plate (7) and the outer periphery of the coil part (5). And like this, each gap (6a),
Cooling air (10a) guided by (6b), (6c), (8)
), (10b), (10c), and (10d) cool the iron core (4) and coil portion (5) of the reactor (3), thereby reducing the iron core part due to iron loss and copper loss of the reactor (3). (4), the heat generated from the coil part (5) is transferred to the blower (
2) and is discharged to the outside.

[0005]

[Problems to be Solved by the Invention] In the above conventional cooling structure, the outer periphery of the coil portion (5) is cooled by passing through the gap (8) between the outermost coil portion (5c) and the wind shield plate (7). It is done by wind (10d), but the coil part (5)
The upper and lower parts of the outer windshield plate (7) are expanded spaces (11) and (1).
2), the problem is that the cooling air (10d) passing around the outer periphery of the coil part (5) does not reach the wind speed required for cooling, and the outermost layer of the coil part (5c) cannot be sufficiently cooled. there were. Therefore, it is necessary to take measures such as increasing the capacity of the blower (2) to increase the amount of cooling air, or increasing the cross-sectional area of the reactor coil to suppress the amount of heat generated. As the amount of cooling air increases, problems arise such as an increase in noise or an increase in the size of the entire device.

[0006] This invention was made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a wind cooling structure that can effectively utilize cooling air, thereby downsizing the blower and obtaining a low-noise and compact reactor. The purpose is to make it possible.

[0007]

[Means for Solving the Problems] In the wind cooling structure for a reactor according to the present invention, a cylindrical ventilation guide is provided along the outer periphery of the coil portion, and a wind shielding plate is provided between the ventilation guide and the inner wall of the casing. A ventilation path is formed between the coil portion and the ventilation guide.

[0008]

[Operation] According to the present invention, sufficient cooling air necessary for cooling is guided to the outer circumference of the coil by the cylindrical ventilation guide provided along the outer circumference of the coil, thereby cooling the outermost coil. Enough done. Moreover, by eliminating air leakage between the wind shield plate and the ventilation guide, effective use of cooling air can be achieved.

[0009]

[Embodiment] Hereinafter, an embodiment will be explained based on the drawings.

FIG. 1 is a partial sectional view showing a wind cooling structure for a reactor according to an embodiment of the present invention in a side view, and FIG. 2 is a partial sectional view showing the same structure in a plan view.

In this embodiment, the basic structure of the device, which includes a blower (2), a reactor (3), a wind shield plate (7), etc., is the same as the conventional device shown in FIG. Therefore, the explanation of the configuration and operation common to the apparatus of FIG. 3 will be omitted, and the following will focus on the points unique to this embodiment.

[0012] In this embodiment, the reactor (3)
The coil part (5c) is placed around the outermost layer of the coil part (5c).
) is provided with a cylindrical ventilation guide (13). The outer wall of this ventilation guide (13) is covered with a wind shield plate (7).
), and there is also a gap (14) between the inner wall of the ventilation guide (13) and the outer wall of the outermost coil part (5c).
is formed.

According to this embodiment, the cooling air sucked in from the air inlet (9) flows through the iron core (4) and the first layer coil (
5a) and the coil parts of each layer (5a), (5b), (
5c) gaps (6a) formed between each other,
(6b) and (6c), as well as the gap (14) inside the cylindrical ventilation guide (13) provided along the outer periphery of the coil part (5).
The coil part (5) is cooled by the cooling air (10e) passing through the coil part (5).
) The outer periphery is also cooled evenly.

Although the above embodiment describes the case of cooling a reactor, the present invention is applicable to other dry static induction equipment such as a transformer installed together with other equipment in a semiconductor device or the like. It can be applied to cooling, and in that case as well, the same effects as above can be achieved.

[0015]

[Effects of the Invention] As described above, according to the present invention, a cylindrical ventilation guide is provided along the outer periphery of the coil portion, and a wind shield plate is provided between the ventilation guide and the inner wall of the casing.
By effectively utilizing the cooling air, the reactor can be cooled with a small amount of cooling air, making it possible to downsize the blower and the reactor and reduce noise.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a wind cooling structure of a reactor according to an embodiment of the present invention when viewed from the side.

[Fig. 2] A partial sectional view showing the above structure of the same example in a plan view.

[Figure 3] Partial cross-sectional view showing the wind cooling structure of a conventional reactor as seen from the side

[Explanation of symbols]

(1) Housing (3) Reactor (5) Coil section (7) Wind shielding board (13) Ventilation guide (14) Gap (ventilation path) In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In a reactor disposed in a housing such as a cubicle, a cylindrical ventilation guide is provided along the outer periphery of the coil part, and a wind shield plate is provided between the ventilation guide and the inner wall of the housing, A wind cooling structure for a reactor, characterized in that a ventilation passage is formed between a coil portion and the ventilation guide.