JP2007085649A - Assembly for electrical component box, and its attachment structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly for an electrical component box, and its attachment structure capable of preventing falling of a component from the electrical component box during a fire, and capable of preventing penetration of fire into the electrical component box interior. <P>SOLUTION: The assembly 2 for the electrical component box 21 is provided with the electrical component box 21, a heat dissipation member 22, and a falling preventing member 23. The electrical component box 21 houses the electrical component 40. The electrical component box 21 is made of resin. The heat dissipation member 22 is fixed to an outer surface of the electrical component box 21. The heat dissipation member 22 is a member for dissipating heat generated from the electrical component 40 to an exterior of the electrical component box 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an assembly of electrical component boxes and a mounting structure thereof.

In the conventional outdoor unit, as described in Patent Document 1, an electrical component box is built in the outdoor unit. The electrical component box is held by the lower cover. The lower cover is attached to the upper part of the partition plate that partitions the periphery of the compressor. The lower cover is inserted into a notch formed in the upper part of the partition plate. The front flange and the lower flange provided on the lower cover are superposed on the periphery of the notch.
No. 2002-5477

  Conventionally, when a fire occurs in the vicinity of an outdoor unit and the fire spreads to the outdoor unit, parts such as heat radiation fins and a lower cover may fall due to melting of the resin electrical component box. When parts such as the heat radiation fins and the lower cover fall off from the electrical component box, the fire may enter into the electrical component box and the printed circuit board inside the electrical component box may be directly burned by the fire. When the printed circuit board is directly baked with fire in this way, in the subsequent investigation, it is impossible to distinguish whether the ignition source is the printed circuit board or the outside of the outdoor unit, and there is a problem that the ignition source cannot be specified. .

  SUMMARY OF THE INVENTION An object of the present invention is to provide an assembly of an electrical component box and its mounting structure that can prevent parts from falling from the electrical component box in the event of a fire and prevent fire from entering the electrical component box. There is.

The assembly of the electrical component box of the first invention includes an electrical component box, a heat radiating member, and a drop-off preventing member. The electrical component box stores electrical components. The electrical component box is made of resin. The heat dissipation member is fixed to the outer surface of the electrical component box. The heat dissipation member is a member for releasing heat generated from the electrical component to the outside of the electrical component box. The drop-off prevention member prevents the heat dissipation member from dropping off.
Here, the assembly of the electrical component box is equipped with a dropout prevention member that prevents the heat dissipation member attached to the electrical component box from falling off, so that the heat dissipation member is prevented from falling off in the event of a fire. It is possible to prevent the fire from getting around.

The assembly of the electrical component box according to the second aspect of the present invention is the assembly of the electrical component box according to the first aspect of the present invention, wherein the dropout prevention member further isolates the heat radiating member from the fire. Fire is generated outside the electrical component box.
Here, the drop-off prevention member can not only prevent the heat-dissipation member from falling off, but can further isolate the heat-dissipation member from the fire generated outside the electrical component box.

The assembly of the electrical component box of the third invention is the assembly of the electrical component box of the first invention or the second invention, and the drop-off preventing member has a flange portion. The flange portion protrudes outward from the surface of the dropout prevention member.
Here, since the drop-off prevention member has a flange portion that protrudes outward from the surface, it is possible to prevent the fire generated outside the electrical component box from entering the heat dissipation member.

The assembly of the electrical component box of the fourth invention is the assembly of the electrical component box of the third invention, and the flange portion is formed by bending the end portion of the drop-off preventing member outward.
Here, since the flange portion is formed by bending the end portion of the drop-off preventing member outward, the flange portion can be easily integrally formed with the drop-off preventing member.
An electrical component box assembly according to a fifth aspect of the present invention is the electrical component box assembly according to the first aspect of the present invention, and the drop-off prevention member has an opening. The opening penetrates from the first surface to the second surface. The first surface faces the heat radiating member. The second surface is opposite to the first surface.
Here, since the drop-off prevention member has an opening penetrating from the first surface facing the heat radiating member to the second surface opposite to the first surface, it is possible to improve the flow of wind through the heat radiating member. .

An electrical component box assembly according to a sixth aspect of the present invention is the electrical component box assembly according to any one of the first to fifth aspects, wherein the electrical component includes a heat generating component. The heat generating component is mounted on the printed board.
Here, even when the electrical component includes a heat generating component mounted on the printed circuit board, heat generated from the heat generating component can be released to the outside of the electrical component box by the heat radiating member.
The assembly of the electrical component box according to the seventh aspect of the present invention is the assembly of the electrical component box according to the sixth aspect of the present invention, and the heat radiating member is in close contact with the heat generating component.
Here, since the heat radiating member is in close contact with the heat generating component, heat is directly conducted from the heat generating component to the heat radiating member, and the heat radiating performance is improved.

The mounting structure of the electrical component box assembly of the eighth invention is a mounting structure for mounting the electrical component box assembly of the first invention to the outdoor unit of the air conditioner. The outdoor unit includes a fan motor base to which a fan motor is attached and a partition plate that partitions the periphery of the compressor. The electrical component box assembly is attached to the outdoor unit such that the drop-off prevention member is supported by the fan motor base and the partition plate, respectively.
Here, since the drop-off prevention member is supported by the fan motor base and the partition plate, it is possible to prevent the drop-off prevention member from falling during a fire.

  The mounting structure of the electrical component box assembly of the ninth invention is a mounting structure for mounting the electrical component box assembly of the first invention to the outdoor unit of the air conditioner. The outdoor unit includes a bell mouth that covers the periphery of the fan. The drop-off prevention member has a flange portion. The flange portion protrudes outward from the surface of the dropout prevention member. The electrical component box assembly is attached to the outdoor unit such that the flange portion is disposed in the vicinity of the periphery of the opening edge of the bell mouth.

  Here, since the flange portion of the drop-off prevention member is arranged in the vicinity of the periphery of the bell mouth opening edge, it is possible to prevent the fire generated outside the electrical component box from flowing into the heat dissipation member from the bell mouth opening edge. Is possible.

According to the first aspect of the present invention, it is possible to prevent the heat radiating member from falling off in the event of a fire, and to prevent fire from entering the electrical component box.
According to the second invention, the heat dissipation member can be isolated from the fire generated outside the electrical component box.
According to the third aspect of the present invention, it is possible to prevent the fire generated outside the electrical component box from entering the heat radiating member.

According to the fourth invention, the flange portion can be easily formed integrally with the drop-off preventing member.
According to 5th invention, the flow of the wind which passes along a thermal radiation member can be improved.
According to the sixth aspect of the invention, the heat generated from the heat generating component can be released to the outside of the electrical component box by the heat radiating member.
According to the seventh aspect, the heat dissipation performance is improved.

According to the eighth aspect, it is possible to prevent the dropout prevention member from falling during a fire.
According to the ninth aspect of the present invention, it is possible to prevent fire generated outside the electrical component box from entering the heat radiating member from the edge of the bell mouth opening.

Next, the assembly of the electrical component box of the present invention and the mounting structure thereof will be described with reference to the drawings.
<Configuration of outdoor unit 1>
An electrical component box assembly 2, which is an assembly of electrical component boxes 21, is attached to the outdoor unit 1 of the air conditioner shown in FIG. 1.

The outdoor unit 1 includes an electrical component box assembly 2, an outdoor heat exchanger 3, a fan 4, a compressor 5, a fan motor base 6, and a partition plate 7 as main components.
The outdoor heat exchanger 3 performs heat exchange between the refrigerant and the outdoor air.
The fan 4 generates an air flow for supplying outdoor air to the outdoor heat exchanger 3. The fan 4 includes a fan motor 8 and a propeller fan 9 that is rotationally driven by the fan motor 8. The propeller fan 9 is made of resin.

A bell mouth 10 is disposed around the propeller fan 9.
The compressor 5 compresses the refrigerant.
The fan motor base 6 is a base to which the fan motor 8 of the fan 4 is attached.
The partition plate 7 partitions the periphery of the compressor 5 to spatially separate the compressor 5 from the heat exchange portion including the outdoor heat exchanger 3 and the fan 4.

<Configuration of electrical component box assembly 2>
As shown in FIGS. 2 to 7, the electrical component box assembly 2 includes an electrical component box 21, a heat sink 22, a drop-off preventing member 23, and a lid 24.
The electrical component box 21 is made of resin and stores the electrical component 40.
The electrical component 40 accommodated in the electrical component box 21 includes a printed circuit board 41 and a heat generating component 42 attached to the printed circuit board 41 as shown in FIG. The heat generating component 42 is an electronic component that generates heat during operation, and is, for example, a power transistor for power control.

The heat sink 22 is a heat radiating member that is fixed to the outside of the bottom surface of the electrical component box 21 and releases heat generated from the electrical component 40 to the outside of the electrical component box 21.
As shown in FIG. 5, the heat sink 22 includes a pedestal portion 22 a and a plurality of heat radiation fins 22 b provided at equal intervals on the lower surface of the pedestal portion 22 a. The heat sink 22 is attached to the bottom surface of the electrical component box 21 such that the heat radiation fins 22 b face in a direction perpendicular to the bottom surface of the electrical component box 21.

The heat sink 22 is made of a metal material such as an aluminum alloy having good thermal conductivity. The heat sink 22 has a pedestal portion 22 a fixed to the outside of the bottom surface of the electrical component box 21 by engagement or screwing.
As shown in FIG. 6, an opening 21 a is formed in the vicinity of the heat generating component 42 on the bottom surface of the electrical component box 21. The base portion 22a of the heat sink 22 is in close contact with the heat generating component 42 through the opening 21a. Thereby, the heat generated from the heat generating component 42 can be released to the outside of the electrical component box 21 by the heat sink 22.

As shown in FIG. 4, the drop-off prevention member 23 includes a first portion 23a and a second portion 23b. The drop-off prevention member 23 is fixed to the electrical component box 21 by a known fixing method such as screwing in a state where the first portion 23a and the second portion 23b are combined.
The drop prevention member 23 not only prevents the heat sink 22 from falling off, but also isolates the heat sink 22 from the fire generated outside the electrical component box 21. In other words, the drop prevention member 23 serves as a heat shield. To do. Specifically, as shown in FIG. 3, the drop-off prevention member 23 covers the heat sink 22 from below, so that a fire generated in the vicinity of the outdoor unit 1 spreads to the resin portion of the fan 4 such as the propeller fan 9. Even in this case, the drop-off prevention member 23 can isolate the heat sink 22 from the fire attached to the resin portion such as the propeller fan 9 of the fan 4.

As shown in FIGS. 3 and 7, the dropout prevention member 23 has a flange portion 25 that protrudes outward from the surface of the dropout prevention member 23. Thereby, it is possible to prevent the fire generated outside the electrical component box 21 from flowing into the heat sink 22.
The flange portion 25 is formed by bending the end portion of the dropout prevention member 23 outward. Thereby, the flange part 25 can be easily integrally formed with the drop-off preventing member 23. In this case, it is preferable that the drop-off preventing member 23 and the flange portion 25 are manufactured from a thin metal plate because they are easy to process and have excellent shape.

As shown in FIGS. 4 and 6, the dropout prevention member 23 has a plurality of slits 28 penetrating from an inner surface 26 facing the heat sink 22 to an outer surface 27 opposite to the inner surface 26. Thereby, it is possible to improve the flow of air through the heat sink 22 (air flow F1 in FIG. 6).
The lid 24 covers the upper part of the electrical component box 21. The lid 24 is made of a thin metal plate, and protects the electrical component 40 inside the electrical component box 21 from fire generated outside the electrical component box 21.

<Mounting structure of electrical component box assembly 2>
As shown in FIG. 2, the electrical component box assembly 2 is attached to the outdoor unit 1 such that the drop-off prevention member 23 is supported by the fan motor base 6 and the partition plate 7, respectively. Specifically, a first flange portion 29 extending horizontally from the upper end edge of the drop-off prevention member 23 is placed on the horizontal portion 6a at the top of the fan motor base 6, and a triangular second flange portion at the bottom of the drop-off prevention member 23. 30 is placed on the horizontal edge 7b of the notch 7a formed in the upper part of the partition plate 7. As a result, even when the electrical component box 21 melts in the event of a fire and the fixed state between the drop-off prevention member 23 and the electrical component box 21 cannot be maintained, the drop-off prevention member 23 is prevented from falling and is placed inside the electrical component box 21. It is possible to prevent the fire from wrapping around.

  Further, as shown in FIG. 6, the electrical component box assembly 2 is attached to the outdoor unit 1 so that the flange portion 25 of the drop-off prevention member 23 is disposed in the vicinity of the periphery of the opening edge 10 a of the bell mouth 10. ing. Thereby, the air flow path 31 intricately formed by the opening edge 10a and the flange portion 25 is formed. This prevents fire generated outside the electrical component box 21 from flowing into the heat sink 22 from the opening edge 10 a of the bell mouth 10.

<Features>
(1)
Since the electrical component box assembly 2 of the embodiment includes the drop-off prevention member 23 that prevents the heat sink 22 fixed to the electrical component box 21 from falling off, the heat sink 22 is prevented from falling off in the event of a fire. It is possible to prevent fire from entering the inside of the product box 21.

(2)
In the electrical component box assembly 2 of the embodiment, the dropout prevention member 23 can be isolated not only from the heatsink 22 from falling off but also from the fire generated outside the electrical component box 21.
(3)
In the electrical component box assembly 2 of the embodiment, the drop-off prevention member 23 has the flange portion 25 protruding outward from the surface thereof, so that the fire generated outside the electrical component box 21 is prevented from flowing into the heat sink 22. It is possible.

(4)
In the electrical component box assembly 2 of the embodiment, since the flange portion 25 is formed by bending the end portion of the dropout prevention member 23 outward, the flange portion 25 is easily integrally formed with the dropout prevention member 23. Is possible.
(5)
In the electrical component box assembly 2 of the embodiment, the drop-off prevention member 23 has the slit 28 penetrating from the inner surface 26 facing the heat sink 22 to the outer surface 27 opposite to the inner surface 26, so that the wind flow through the heat sink 22 is prevented. It is possible to improve.

(6)
In the electrical component box assembly 2 of the embodiment, even when the electrical component 40 includes the heat generating component 42 mounted on the printed circuit board 41, the heat generated from the heat generating component 42 is released to the outside of the electrical component box 21 by the heat sink 22. Is possible.
(7)
In the electrical component box assembly 2 of the embodiment, since the heat sink 22 is in close contact with the heat generating component 42, heat is directly conducted from the heat generating component 42 to the heat sink 22, and heat dissipation performance is improved.

(8)
In the mounting structure of the electrical component box assembly 2 according to the embodiment, the drop-off prevention member 23 is supported by the fan motor base 6 and the partition plate 7, so that the drop-off prevention member 23 is prevented from falling during a fire. Is possible.
(9)
In the mounting structure of the electrical component box assembly 2 of the embodiment, the flange portion 25 of the drop-off preventing member 23 is disposed in the vicinity of the periphery of the opening edge 10a of the bell mouth 10, so that the fire generated outside the electrical component box 21 Can be prevented from entering the heat sink 22 from the opening edge 10a of the bell mouth 10.

<Modification>
In the above embodiment, the heat sink 22 is attached to the bottom surface of the electrical component box 21 such that the heat radiating fins 22b are perpendicular to the bottom surface of the electrical component box 21, but the present invention is not limited to this. The mounting structure of the electrical component box assembly 2 of the present invention can be applied even when the radiating fins are mounted in the horizontal direction (that is, parallel to the bottom surface of the electrical component box 21). is there.

  The electrical component box assembly and the mounting structure thereof according to the present invention are applied to all devices incorporating the electrical component box assembly, and are particularly suitable for the electrical component box assembly mounting structure in an outdoor unit of an air conditioner. Applied.

The block diagram of the outdoor unit of the air conditioner to which the electrical component box assembly of this invention was attached. The disassembled perspective view which shows the attachment structure of the electrical component box assembly of FIG. The front view which shows the attachment structure of the electrical component box assembly of FIG. FIG. 3 is an exploded perspective view of the dropout prevention member of FIG. 2. The perspective view of the heat sink of FIG. The figure which shows the flow of the air of the heat sink vicinity of FIG. The enlarged view of the heat sink periphery part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Electrical component box assembly 3 Outdoor heat exchanger 4 Fan 5 Compressor 6 Fan motor stand 7 Partition plate 21 Electrical component box 22 Heat sink 23 Fall-off prevention member 25 Flange part 28 Slit

Claims (9)

A resin-made electrical component box (21) for housing the electrical component (40);
A heat radiating member (22) fixed to the outer surface of the electrical component box (21) and for releasing heat generated from the electrical component box (40) to the outside of the electrical component box (21);
A drop-off prevention member (23) for preventing the heat dissipation member (22) from dropping off;
Comprising
Assembly (2) of electrical component box (21). The drop-off prevention member (23) further isolates the heat dissipation member (22) from the fire generated outside the electrical component box (21).
The assembly (2) of the electrical component box (21) according to claim 1. The drop-off prevention member (23) has a flange portion (25) protruding outward from the surface of the drop-off prevention member (23).
The assembly (2) of the electrical component box (21) according to claim 1 or 2. The flange portion (25) is formed by bending the end portion of the drop-off prevention member (23) outward.
The assembly (2) of the electrical component box (21) according to claim 3. The drop-off prevention member (23) has an opening (28) penetrating from a first surface facing the heat dissipation member (22) to a second surface opposite to the first surface.
The assembly (2) of the electrical component box (21) according to claim 1. The electrical component (40) includes a heat generating component (42) mounted on a printed circuit board (41).
The assembly (2) of the electrical component box (21) according to any one of claims 1 to 5. The heat dissipation member (22) is in close contact with the heat generating component (42).
The assembly (2) of the electrical component box (21) according to claim 6. An attachment structure for attaching the assembly (2) of the electrical component box (21) according to claim 1 to an outdoor unit (1) of an air conditioner,
The outdoor unit (1)
A fan motor base (6) to which the fan motor (8) is attached;
A partition plate (7) for partitioning the periphery of the compressor (5);
With
The assembly (2) of the electrical component box (21) includes the outdoor unit (23) such that the drop-off prevention member (23) is supported by the fan motor base (6) and the partition plate (7), respectively. Attached to 1),
Mounting structure of assembly (2) of electrical component box (21). An attachment structure for attaching the assembly (2) of the electrical component box (21) according to claim 1 to an outdoor unit (1) of an air conditioner,
The outdoor unit (1) includes a bell mouth (10) covering the periphery of the fan (4),
The drop-off prevention member (23) has a flange portion (25) protruding outward from the surface of the drop-off prevention member (23),
The assembly (2) of the electrical component box (21) includes the outdoor unit (1) such that the flange portion (25) is disposed in the vicinity of the periphery of the opening edge (10a) of the bell mouth (10). Attached to the
Mounting structure of assembly (2) of electrical component box (21).

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