JPH10339472A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce influence against a surrounding portion caused by irregular heat generated from an electrical circuit board having many collected electrical parts or temporary occurrence of fire. SOLUTION: This air conditoiner is constructed such that a case of metallic sheet covering an upper surface, a lower surface, a right surface and a left surface as well as a rear surface is fitted to an electrical circuit board storing part made of resin of an electrical box 101, a resin cover 106 is used at a part of the lower portion of the opening part of the front surface and the central part and the upper part of the opening of time front surface are covered by a metallic sheet cover 107, thereby reducing a catching fire from the electrical circuit board and further influence against the electrical circuit board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall-mounted air conditioner having a heat exchanger, a blower, and an electrical box in a case, and more particularly to a wall-mounted air conditioner installed on a wall in a room.

[0002]

In this type of conventional air conditioner, the electrical box is composed of a case and a cover, and an electrical board is housed inside. An electric component is provided on the electric component board, and electric wires extend from the electric component toward each electric component outside the electric component box.

[0003] Since the electrical box is made of resin for both the case and the lid, there is a risk of fire inside the case caused by incorrect wiring or turning on a non-regular power source during installation or relocation, or a component on the electrical board. In some cases, overheating or short-circuiting of parts caused by defective or deteriorated parts may cause fires in the surroundings, deform the surroundings, and so on.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention relates to a wall-mounted air conditioner having a heat exchanger, a blower, and an electric box in a main body, wherein the electric box is an electric box. A part in which a sheet metal case is fitted around the resin storage part in which the board is stored, a sheet metal lid that covers the central part and upper part of the storage part opening, and a resin that covers the lower part of the storage part opening And a cover made of the same.

Further, the sheet metal cover is provided with an upper claw to be inserted into the case of the electrical box, and the resin cover is provided with a claw for pressing a lower portion of the sheet metal cover. .

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the air conditioner.

[0007]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

A wall-mounted air conditioner according to an embodiment of the present invention is a home air conditioner capable of cooling and heating, and is mounted on an indoor wall as an indoor unit connected to an outdoor unit. .

As shown in FIG. 1, the air conditioner mainly contains a refrigerant heat exchanger 5 into which a refrigerant is introduced, a hot water heat exchanger 6 into which hot water is introduced, and a blower 7 in a case 4. doing.

The case 4 comprises a frame 10 and a grill 11, and a suction port is formed in the front of the grill 11. An outlet is formed on the lower side of the grill 11, and guide blades for guiding the air blowing direction are provided at the outlet.

The frame 10 comprises a top plate 23 located on the upper side, a bottom 25 located on the lower side, and a back plate 27 located on the wall side between the top plate 23 and the bottom 25. These are integrally formed from a synthetic resin.

The top plate portion 23 has a hollow at a portion where the upper end of the refrigerant heat exchanger 5 and the upper end of the hot water heat exchanger 6 are in contact with each other, and the portion is insulated.

The refrigerant heat exchanger 5 is an outdoor unit 3 of an air conditioner.
1 (see FIG. 4), and the refrigerant is introduced through a refrigerant circuit. The hot water heat exchanger 6 is similarly connected to a heat source unit 32, and a hot water circuit Warm water is introduced through.

The blower is a centrifugal blower, and has a motor 18.
Vertical cross flow fan (fan) rotated by
20 and an air guide plate for guiding the wind blown out by the cross flow fan 20. This air guide plate is formed integrally with the back plate 27.

As shown in FIG. 2, the motor 18 is provided inside the case 4 at one end in the longitudinal direction. An electric box is provided between the motor 18 and the end wall of the case. Storage space 33 is formed.

The storage space 33 is provided on the side of the motor 18 so as to cross the depth direction inside the case 4. The electrical box 101 is stored in the storage space 33.

The electrical box 101 is formed in a substantially cylindrical shape, and has two electrical boards 102a, 1
02b (see FIG. 3) is accommodated, and is an electrical board storage section 8 having a large board area.

On the grill 11 side, the electrical equipment box 10
An operation unit support base (resin cover) 106 is attached to a substantially central portion of the upper opening 105 of the first electronic device 1, and the operation unit support base (a resin cover) 106 is bridged as a beam of the upper opening 105 to form an electrical component box 101.
Has been reinforced.

A terminal block support 115 on which the terminal blocks 113 and 114 are placed is formed integrally therewith.
It is designed to be mounted on an oblique surface with the lower part facing you.

An opening 125 is provided in the lower part thereof, and a through-hole is formed to reach the lower end on the rear side of the case. The through-hole is provided through the through-hole from the rear of the case and has the purpose of laying a cable for electrical connection.

On the grill 11 side, the electrical box 10
A door which is large enough to cover the terminal block and the through-hole at the lower part of 1 and is opened by lifting the lower side forward with the upper side as a fulcrum. There is a knob at the lower part on the front side of the door for pinching it with your finger to open the door. The left side of the front side of the door is screwed so that it is fixed to the grill.

The terminal blocks 113 and 114 are connected to the terminals of the electrical box at the upper part, and the lower part thereof is connected to the respective wires of the cables to be connected to these terminals by being inserted into the holes of the terminal blocks.

Below this, a fixing band for fixing the cable is provided to prevent the cable from hanging down and to securely fix the cable.

The fixing band has a structure in which one end is engaged with a flat portion and the multi-end is fixed with a screw.

As shown in FIG. 1, the back plate 27 of the case 4
, A bundle of pipes 118 such as a drain hose, a refrigerant pipe, and a hot water pipe is collectively stored in a space at a lower end thereof.

Here, the refrigerant circuit and the hot water circuit will be described.

FIG. 4 is a circuit diagram of the refrigeration cycle.

In this figure, the indoor unit 3 contains a refrigerant heat exchanger 5, a hot water heat exchanger 6, and a variable flow rate valve 61. The refrigerant heat exchanger 5 has a refrigerant pipe 3 through which the refrigerant flows.
9, the hot water heat exchanger 6 is provided with a hot water pipe 41 through which hot water flows, and the refrigerant heat exchanger 5 is arranged more upstream in the ventilation path than the hot water heat exchanger 6. .

When the refrigerant is circulating in the refrigerant pipe 39, the pressure is reduced by the electric expansion valve 43, so that the refrigerant evaporates in the refrigerant heat exchanger 5 and cools the air. The water temperature of the part is condensed and drained.), And the conditioned room is cooled. When hot water is circulating in the hot water pipe 41, the air is heated by the hot water heat exchanger 6, so that the conditioned room is heated.

When circulating the refrigerant through the refrigerant heat exchanger 5 and simultaneously circulating the hot water through the hot water heat exchanger, once cooled air is heated again, the cooling capacity and the heating capacity are adjusted. The temperature of the air after passing through the indoor heat exchanger 3 can be controlled. The air at this time is dehumidified (removed moisture) according to the cooling capacity at the time of cooling. The outdoor unit 31 houses a compressor 45 for the refrigerant, an outdoor heat exchanger 47, an accumulator 49, and the like.
These are connected by a refrigerant pipe to the refrigerant heat exchanger 5, the electric expansion valve 43, and the like to form a refrigeration cycle (the refrigerant circulates in the direction of the solid line arrow).

A heat source unit 32 is provided outside the room, and includes a heater 53 (for example, a burner), a heat exchanger 55, a pump 57,
A pressure tank 59 and the like are housed, and these are connected together with the hot water heat exchanger 5 by a hot water pipe 41 in an annular shape.
It constitutes a hot water circulation circuit.

According to this, the amount of heat radiated by the hot water heat exchanger 6 can be controlled by changing the amount of heating in the heater 53 and the amount of circulation of hot water by the variable flow rate valve 61. Reference numeral 63 denotes a reserve tank which stores excess hot water in the hot water circulation circuit, and the overflow from the tank 63 is drained as drain. Reference numeral 65 denotes a pressurized water injection device for injecting hot water (water) into the hot water circulation circuit.
Symbols 69 and 71 are piping between units for refrigerant, 73 and 75
Is an inter-unit pipe for hot water, which connects the indoor unit (air conditioner) 3 and the outdoor unit 31.

Next, the operation of the present embodiment will be described.

As shown in FIG. 2, the electrical box has a rectangular shape that is long vertically when viewed from the front, and has a depth at the top and a box-shaped electrical board storage space with a large space for storing two electrical boards. Part.

A case made of sheet metal is fitted so as to cover the outside of the electrical board storage section 8. This sheet metal case is box-shaped, and one of the six surfaces (the front surface) has an opening, and the electrical substrate housing portion 8 is fitted from behind.

At the center of the electrical box, a support base for mounting an operation unit in which operation switches and the like are arranged is bridged as a beam of an opening from the upper portion to the central portion of the electrical box to reinforce the electrical box. Along with the cover (resin cover).

The operation board, the terminal block, and the wiring are connected from the electrical board accommodated in the upper part.

A sheet metal cover 107 is attached to the upper part of the opening of the electrical equipment box except for a part of the lower part thereof, and serves as a lid of the electrical equipment housing part together with the resin cover.

In the event of a temporary fire on the electrical board, a sheet metal cover and a sheet metal case covering the electrical box storage section should prevent fires as much as possible and reduce the effect on the surrounding area. Can be.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the paper of the present invention.

For example, in the above-described embodiment, a description has been given using a wall-mounted air conditioner which is equipped with a refrigerant heat exchanger and a hot water heat exchanger and is capable of cooling and heating, but is not limited thereto. Even with an air conditioner having only the above, the same effects as those of the above-described embodiment can be obtained.

[0042]

As described above, according to the present invention, the influence on the surroundings due to an electric fire is reduced by covering the periphery of the electrical board on which electrical components are concentrated with a sheet metal.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a diagram of the electrical box as viewed from the front.

FIG. 3 is an exploded view showing a main part of the embodiment.

FIG. 4 is a refrigerant circuit diagram of the air conditioner of the present embodiment.

[Explanation of symbols]

 3 Air Conditioner 4 Case 5 Refrigerant Heat Exchanger 6 Hot Water Heat Exchanger 8 Electrical Board Storage Unit 10 Frame 11 Grill 18 Motor 20 Cross Flow Fan 33 Storage Space 37 Indoor Unit 101 Electrical Box 102 Electrical Board 105 Opening (Electric Board Storage Unit) ) 106 Operation section support base (resin cover) 107 Sheet metal cover 113 Terminal block 114 Terminal block 115 Terminal block support base 125 Opening (Cable wire through hole)

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Katsuo Suzuki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A wall-mounted air conditioner including a heat exchanger, a blower, and an electric box in a main body, wherein the electric box is formed of a sheet metal case around a resin-made accommodating portion accommodating an electric board. An air conditioner, comprising: a portion in which the housing is fitted; a sheet metal cover that covers a central portion and an upper portion of the opening of the storage portion; and a resin cover that covers a lower portion of the opening of the storage portion. . 2. The sheet metal cover according to claim 1,
The air conditioner according to claim 1, wherein an upper claw to be inserted into a case of the electrical component box, and the resin cover include a claw for pressing a lower part of the sheet metal cover.