JP2013214624A - Cooling device of electric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cooling device of an electric device which prevents the deterioration of heat exchange capacity of the cooling device.SOLUTION: A cooling device includes: a first duct 9 having an air intake port 12 taking in outer air and an outer air introduction port 14 introducing the outer air into a room; a second duct 6 that is provided at a position higher than an electric apparatus provided in the room and has an exhaust port 13 used for exhausting air of an indoor space 20 to the outdoor; a cooler 2 absorbing heat from a cooling medium of the electric apparatus using the air introduced into the room and having an exhaust part exhausting the heated air to the second duct 6 side; and an air intake hood 7 which is integrally formed with the second duct 6 and is formed so as to protrude from the second duct 6 toward the exhaust part, the air intake hood 7 where a tip is positioned at a lower position than an end part of the cooler 2 that is formed at the exhaust part side and enclosing the end part.

Description

  The present invention relates to a cooling apparatus for an electric device installed indoors.

  Gas-insulated transformers that use flame-retardant and superior insulating properties such as SF6 gas as an insulating cooling medium can improve safety and be downsized compared to conventional oil-filled transformers. It is often installed indoors, such as in the basement of a building. However, since the gas insulation transformer has inferior cooling characteristics compared to conventional oil-filled transformers, for example, a method of forcibly circulating and cooling the insulation cooling medium using a cooling device equipped with a heat exchanger is generally used. Applied (for example, Patent Document 1 below).

JP-A-2-288121

  However, the conventional cooling device represented by the above-mentioned Patent Document 1 absorbs heat stored in the insulating cooling medium in the gas-insulated transformer by the blower and the heat exchanger in the cooling device, and heats the heated air indoors. It is a structure that discharges the machine. And this heated air is discharged | emitted out of the room through the duct provided in the indoor ceiling, for example. Therefore, when a plurality of gas-insulated transformers are installed in the same room, the air discharged from the cooling device for one gas-insulated transformer is sucked into the cooling device for the other gas-insulated transformer. There is a problem in that the heat exchange capacity of the apparatus is reduced and the load on the cooling device is increased, leading to a reduction in life.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the cooling device of the electric equipment which can prevent the fall of the heat exchange capability of a cooling device.

  In order to solve the above-described problems and achieve the object, the present invention provides a first duct having an intake port for taking in outside air and an outside air introduction port for introducing the outside air into the room, and an electric device provided in the room And a second duct having an exhaust port for exhausting the air in the indoor space to the outside, and the air introduced into the room using the air introduced into the room to absorb heat from the cooling medium of the electric equipment, A cooler having an exhaust part that discharges to the second duct side, and is formed integrally with the second duct, and is formed in a protruding shape from the second duct toward the exhaust part; An intake hood that is positioned below an end portion of the cooler formed on the exhaust portion side and surrounds the end portion.

  According to this invention, since the high-temperature air discharged from the exhaust part of the cooler is introduced into the second duct by the intake hood, it can be prevented that the heat exchange capacity of the cooling device is lowered. There is an effect.

FIG. 1 is a diagram schematically illustrating a cooling device for electric equipment and peripheral equipment according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA shown in FIG. FIG. 3 is an external perspective view of the intake hood and the cooler. 4 is a cross-sectional view taken along the line BB shown in FIG. FIG. 5 is a diagram illustrating an example in which the position of the first duct is changed. FIG. 6 is a diagram illustrating an example in which the position of the intake port is changed.

  Hereinafter, embodiments of a cooling apparatus for an electric device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram schematically showing a cooling device for electrical equipment and its peripheral equipment according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. 3 is an external perspective view of the intake hood 7 and the cooler 2, FIG. 4 is a cross-sectional view taken along the line BB shown in FIG. 3, and FIG. 5 shows the position of the first duct 9. FIG. 6 is a diagram illustrating an example in which the position of the intake port 12 is changed.

  In FIG. 1, the cooling apparatus for an electric device according to the present embodiment mainly discharges the cooler 2 that cools the transformer 1 that is the electric device and the indoor air 20 provided in the indoor ceiling. The second duct 6 to be performed, the intake hood 7 provided in the second duct 6, the first duct 9 for introducing outside air, and the sound absorbing material 11 provided on the inlet 12 side of the first duct 9. And an exhaust blower 10 provided inside the second duct 6, and a sound absorbing material 15 provided on the outdoor side of the blower 10.

  The first duct 9 is provided, for example, below the floor 16 in the room, and supplies the outside air taken in from the air inlet 12 into the room, for example, through an outside air inlet 14 provided near the cooler 2. To do. In FIG. 1, two sets of the transformer 1 and the cooler 2 are provided as an example, and two outside air inlets 14 are provided so as to correspond to these sets.

  In the prior art represented by the above-mentioned Patent Document 1, the transformer 1 is entirely surrounded by a storage box as a countermeasure for cooling a relatively low-voltage transformer or its noise. In some cases, a cooling structure is used in which the air taken in is passed through the heat dissipating fins of the transformer 1 and the heated air is discharged to the outside through a duct connected to the storage box. Unlike the cooling structure described above, the cooling apparatus for electrical equipment according to the present embodiment is used for the transformer 1 because the transformer 1 is not surrounded by a storage box in consideration of maintainability of the transformer 1. The transformer 1 is cooled by circulating a cooling medium between the transformer 1 and the cooler 2.

  This will be specifically described below. In the transformer 1, SF6 gas or insulating oil having flame resistance and excellent insulating properties is used as a cooling medium, and heat generated by the reactor (not shown) of the transformer 1 is absorbed by the cooling medium, This cooling medium circulates between the transformer 1 and the cooler 2 through the pipe 3 a and the pipe 3 b provided between the transformer 1 and the cooler 2.

  The cooler 2 is formed in a rectangular parallelepiped shape, for example, the suction part 2d is provided on the floor 16 side, and the end part 2a on the exhaust part 2e side is disposed on the second duct 6 side. Further, a blower 5 for sending air introduced into the room through the outside air inlet 14 into the cooler 2 is provided inside the cooler 2 on the suction part 2d side, and a heat exchanger is provided inside the cooler 2. 2f is provided.

  Further, the cooler 2 is arranged so that the vertical center position of the cooler 2 is higher than the vertical center position of the transformer 1 by the support member 4a and the support member 4b in order to promote circulation of the cooling medium. ing. A space is provided between the suction portion 2d of the cooler 2 and the floor 16, but by securing such a space, for example, a work space for maintaining the blower 5 and the like of the cooler 2 is secured. And maintainability can be improved. The shapes of the support member 4a and the support member 4b are not limited to the shapes shown in FIG. 1, and the cooler 2 can be held above the transformer 1 so as to promote the circulation of the cooling medium. Any structure can be used.

  The cooling medium heated by the transformer 1 and having a reduced specific gravity is introduced into the cooler 2 via the pipe 3a, and the cooling medium introduced into the cooler 2 flows through the heat exchanger 2f inside the cooler 2. The heat exchange takes place at Since the cooled cooling medium has a higher specific gravity, it is returned again to the transformer 1 through the pipe 3b. In addition, air that has reached a high temperature due to heat deprived from the cooling medium is exhausted from the exhaust section 2 e of the cooler 2.

  An intake hood 7 is formed in the second duct 6 toward the exhaust part 2 e side of the cooler 2. 2 to 4, the intake hood 7 is formed integrally with the second duct 6, for example, and protrudes from the lower surface of the second duct 6 toward the exhaust part 2 e of the cooler 2, The tip 7a is located below the end 2a on the exhaust part 2e side of the cooler 2, and the side surface 7b is formed so as to surround the end 2a. That is, the intake hood 7 is formed such that the end 2 a on the exhaust portion 2 e side of the cooler 2 is positioned above the tip 7 a of the intake hood 7. By adopting such a configuration, the high-temperature air discharged from the exhaust part 2e of the cooler 2 rebounds on the surface of the second duct 6 and is sucked into the cooler 2 that cools the other transformer 1. Can be suppressed.

  The position of the tip 7a of the intake hood 7 may be any position as long as it is below the end 2a of the cooler 2 on the exhaust part 2e side, but that position is the end of the cooler 2 on the exhaust part 2e side. When the cooling unit 2 is located extremely lower than the part 2a, the maintainability of the cooling unit 2 may be deteriorated, for example, the cooling unit 2 may interfere with the intake hood 7 when the cooling unit 2 is removed. As such a countermeasure, the intake hood 7 shown in FIG. 1 is formed such that the tip 7a becomes wider from the second duct 6 side toward the cooler 2 side.

  Inside the intake hood 7, a support member that supports the end 2 a on the exhaust part 2 e side of the cooler 2 in order to assist the mechanical strength of the support member 4 a and the support member 4 b against the vertical vibration of the cooler 2. For example, two 8 are provided. The support member 8 has, for example, a quadrangular prism shape extending horizontally inside the pair of side surfaces 7 b of the intake hood 7, and the member end surface 8 a is installed on the side surface 7 b of the intake hood 7. An L-shaped member 2c is attached to the cooler 2 in the vicinity of the end portion 2a of the side surface 2b, and the U-bolt (see FIG. The L-shaped member 2c is fixed to the support member 8 by inserting a fastening member such as (not shown). By fixing the exhaust unit 2e side of the cooler 2 to the intake hood 7 in this way, the vertical vibration of the cooler 2 can be suppressed without disturbing the exhaust of the cooler 2. The air discharged from the exhaust section 2e of the cooler 2 is sucked by the blower 10 that is disposed in the second duct 6 and generates a negative pressure, flows through the intake hood 7 and the second duct 6, and is discharged from the exhaust port 13. Discharged from.

  A plurality of coolers 2 are installed in the indoor space 20 shown in FIG. 1, but according to the cooling device of the present embodiment, each cooler is provided by the intake hood 7 provided on the upper side of each cooler 2. Since the high-temperature air discharged from 2 is respectively sucked, the air discharged from one cooler 2 is not sucked into the other cooler 2. Therefore, the heat exchange capability of the cooler 2 is not lowered, and an increase in the load of the cooler 2 can be suppressed. Moreover, in FIG. 1, since the exhaust port 13 of the 2nd duct 6 is provided above the inlet port 12, even when the air blower 10 has stopped, the air discharged | emitted from the cooler 2 is natural convection. To the exhaust port 13. Therefore, even when the blower 10 is stopped, it is possible to suppress a decrease in the heat exchange capability of the cooler 2.

  The sound absorbing material 15 is provided, for example, on the exhaust port 13 side of the blower 10, and when provided at this position, not only the sound generated by the blower 10 but also the sound generated on the indoor space 20 side (for example, excitation of the transformer 1). Sound and noise by the blower 5 can also be suppressed. Note that the position of the sound absorbing material 15 is not limited to this. For example, when the sound absorbing material 15 is provided on the indoor side of the blower 10, it is possible to suppress the sound generated in the indoor space 20. . Further, by providing the sound absorbing material 11 in the vicinity of the air inlet 12 of the first duct 9, it is possible to suppress the sound of the indoor space 20 that leaks out of the air inlet 12.

  FIG. 1 shows a configuration example in the case where the first duct 9 is provided on the lower side of the floor 16, but the cooling device for the electric equipment according to the present embodiment is as shown in FIG. 5. A similar effect can be obtained by the first duct 9 a provided on the upper side of the floor 16. Further, when configured in this manner, the degree of freedom of the position where the intake port 12a and the outside air introduction port 14a are provided increases, so that the outside air introduced into the indoor space 20 can be effectively guided to the cooler 2, and the cooling medium Can be cooled more effectively.

  In addition, FIG. 1 shows a configuration example when the air inlet 12 is provided on the lower side of the floor 16, but the cooling device for the electrical equipment according to the present embodiment is as shown in FIG. By providing the air inlet 12b and the first duct 9b on the wall surface of the room and further increasing the air volume of the blower 10, the same effect as described above can be obtained even when the air inlet 12 cannot be disposed near the floor surface. it can. Further, in this configuration, since the degree of freedom in handling the first duct 9b is increased, for example, the outside air inlet 14b can be provided in the vicinity of the cooler 2, and the cooling medium can be cooled more effectively. Is possible.

  In the present embodiment, as an example, two sets of the transformer 1 and the cooler 2 are provided, two intake hoods 7 are formed in the second duct 6, and two outside air introductions are further introduced into the first duct 9. Since the opening 14 is provided, the plurality of transformers 1 can be cooled by effectively using the second duct 6 and the first duct 9. Therefore, the introduction cost of the whole cooling device can be reduced as compared with a structure in which each transformer 1 is covered with a storage box as in the prior art.

  Further, a temperature sensor 18 may be provided inside the intake hood 7, and the blower 10 may be configured to drive the fan of the blower 10 when the temperature detected by the temperature sensor 18 exceeds a predetermined temperature. Good. If comprised in this way, it is possible to suppress the power consumption of the air blower 10 compared with the case where the air blower 10 is always operated.

  In the present embodiment, the transformer 1 is used as an example of an electric device that generates heat. However, the electric device is not limited to the transformer 1 as long as the cooling medium is used. Further, the position of the suction part 2d of the cooler 2 does not necessarily have to be a position facing the floor 16 as long as the air introduced into the room through the outside air introduction port 14 can be sucked. 2 may be the surface (side surface 2b) on the transformer 1 side. Moreover, in this Embodiment, although the cooler 2 carrying the heat exchanger 2f is used, the cooler 2 is not limited to a heat exchange system, A forced air cooling system may be used. In addition, the shape of the cooler 2 is not limited to a rectangular parallelepiped shape, and may be any structure that can take in air from the lower side of the indoor space 20 and discharge the heat-exchanged air to the second duct 6 side. Shall.

  As described above, the cooling device for an electrical device according to the present embodiment has the intake ports (12, 12a, 12b) for taking in the outside air and the outside air introduction ports (14, 14a, 14b) for introducing the outside air into the room. And a first duct (9, 9a, 9b) having an air outlet, and an exhaust port 13 that is provided above an electric device (for example, the transformer 1) provided in the room and exhausts air in the indoor space 20 to the outside. A cooler 2 having a second duct 6 having an exhaust section 2e that absorbs heat from the cooling medium of the electrical equipment using air introduced into the room and discharges the warmed air to the second duct 6 side; 2 is formed integrally with the duct 6, protrudes from the second duct 6 toward the exhaust part 2 e, and has a tip 7 a below the end 2 a of the cooler 2 formed on the exhaust part 2 e side. On the side and surrounding the end 2a And de 7. Thus comprises, the high temperature air discharged from the exhaust portion 2e of the cooler 2 is introduced into the second duct 6 by the intake hood 7. Therefore, it is possible to suppress the high-temperature air from rebounding on the surface of the second duct 6 and being sucked into the other cooler 2. As a result, the heat exchange capacity of the cooler 2 is not reduced, and an increase in the load of the cooler 2 can be suppressed. Further, compared to the case where the cooler 2 is directly connected to the second duct 6, the mounting position of the cooler 2 is not restricted, and the mounting work is facilitated, and the introduction cost and the maintenance cost are suppressed. Is possible.

  In addition, since the intake hood 7 of the present embodiment is provided with a support member 8 that is installed inside the intake hood 7 and supports the end 2a of the cooler 2, the exhaust portion 2e side of the cooler 2 is disposed on the exhaust hood 7 side. It can be fixed to the intake hood 7.

  In addition, since the intake hood 7 of the present embodiment is formed so as to widen from the second duct 6 side toward the cooler 2 side, the intake hood 7 is attached to the intake hood 7 when the cooler 2 is attached or detached. Interference can be suppressed and maintainability of the cooler 2 can be improved.

  Further, the cooler 2 according to the present embodiment is configured such that the suction part 2d for sucking air introduced into the room is located below the cooler 2 and the exhaust part 2e is located above the cooler 2. Since the outside air introduction port 14 is disposed in the vicinity of the suction portion 2d, air having a relatively low temperature in the indoor space 20 can be introduced into the cooler 2, and the transformer 1 is effective. Cooling is possible.

  Further, since at least one of the inside of the first duct 9 and the inside of the second duct 6 of the present embodiment is provided with a sound absorbing material (sound absorbing material 11 and sound absorbing material 15), the sound is emitted outside. Noise can be suppressed.

  In addition, the second duct 6 of the present embodiment is provided with a blower 10 that generates negative pressure, and the sound absorbing material 15 provided in the second duct 6 is provided on the exhaust port 13 side of the blower 10. Therefore, it is possible to suppress wind noise caused by the fan of the blower 10 emitted outside the room.

  Further, a temperature sensor 18 is provided inside the intake hood 7 of the present embodiment, and the blower 10 turns off the fan of the blower 10 when the temperature detected by the temperature sensor 18 exceeds a predetermined temperature. Since it was made to drive, it is possible to suppress the electric power consumption of the air blower 10 compared with the case where the air blower 10 is always operated.

  Note that the electrical device cooling apparatus according to the embodiment of the present invention shows an example of the content of the present invention, and can be combined with another known technique. Of course, it is possible to change and configure such as omitting a part without departing from the scope.

  As described above, the present invention can be applied to a cooling device for electrical equipment, and is particularly useful as an invention that can prevent a decrease in heat exchange capability of the cooling device.

1 Transformer (electric equipment)
2 cooler 2a end 2b, 7b side face 2c L-shaped member 2d suction part 2e exhaust part 2f heat exchanger 3a, 3b piping 4a, 4b support member 5, 10 blower 6 second duct 7 intake hood 7a tip 8 support member 8a Member end face 9, 9a, 9b First duct 11, 15 Sound absorbing material 12, 12a, 12b Inlet 13 Exhaust outlet 14, 14a, 14b Outside air inlet 16 Floor 17 Ceiling 18 Temperature sensor 20 Indoor space

Claims (7)

A first duct having an intake port for taking in outside air and an outside air introduction port for introducing the outside air into the room;
A second duct having an exhaust port that is provided above an electrical device provided in the room and exhausts air in the indoor space to the outside;
A cooler having an exhaust section that absorbs heat from the cooling medium of the electrical equipment using air introduced into the room and discharges the warmed air to the second duct side;
Formed integrally with the second duct, projecting from the second duct toward the exhaust part, and having a tip lower than the end of the cooler formed on the exhaust part side And an intake hood surrounding the end,
A cooling apparatus for electric equipment, comprising:   The cooling device for an electric device according to claim 1, wherein the intake hood is provided with a support member that is installed inside the intake hood and supports an end of the cooler.   3. The cooling device for an electric device according to claim 1, wherein the intake hood is formed so as to expand toward the cooler side from the second duct side. 4. The cooler is arranged such that a suction part for sucking air introduced into the room is located below the cooler, and the exhaust part is located above the cooler,
The apparatus for cooling an electric device according to any one of claims 1 to 3, wherein the outside air introduction port is provided in the vicinity of the suction portion.   5. The cooling of an electrical device according to claim 1, wherein a sound absorbing material is provided in at least one of the inside of the first duct and the inside of the second duct. apparatus. The second duct is provided with a blower that generates negative pressure,
The cooling device for an electric device according to claim 1, wherein the sound absorbing material provided in the second duct is provided on the exhaust port side of the blower. A temperature sensor is provided inside the intake hood,
The cooling device for an electric device according to any one of claims 1 to 6, wherein the blower drives a fan of the blower when the temperature detected by the temperature sensor exceeds a predetermined temperature. .

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