JP2001065913A - Air-conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a flame from propagation to the internal part of an electric accessory box even when a fire occurs to a connection part between the electric accessory box and the power line of on external part and further to prevent the occurrence of substantial seizure to the internal part of an air-conditioner. SOLUTION: This air-conditioner is provided with a heat exchanger at least at an internal part and an electric accessory box containing a control base plate 26 for controlling operation situated at the side of the heat exchanger. In this case, a terminal plate 32 connected to the control base plate 26 and to which an electric cable 36 from an external part is inserted from below for connection is situated at the upper front of the electric accessory box and a terminal service cover is provided to cover the terminal plate 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a built-in electrical box, and more particularly to an arrangement of a terminal board for connecting an external electric cable such as a power cable or a signal line.

[0002]

2. Description of the Related Art In general, a separation type air conditioner composed of an indoor unit and an outdoor unit has a heat exchanger and a blowing device for cooling / heating indoor air in an indoor unit, and further changes a wind direction. Electrical equipment such as a motor for flaps and a control box for controlling the operation of these electrical equipment are also stored at the same time.

[0003] The electrical box of such an air conditioner is provided with a ventilation opening for releasing heat from the internal heat-generating electrical parts, and at the same time, the electrical box is fire-retardant in preparation for ignition from the electrical parts. It was molded from a non-conductive resin material.

[0004]

However, in the conventional electric box constructed as described above, the electric cable drawn from the outside is connected to the control board via a terminal plate provided below the electric box. If dust accumulates on the terminal plate and tracking occurs at high humidity, the flame is likely to propagate around the electrical box and to the flammable casing and front panel.

[0005] The present invention provides an air conditioner that can suppress the propagation of a flame to a flammable member even if a flame is generated against the above-mentioned problem.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, at least an internal heat exchanger,
In an air conditioner having an electrical box arranged on the side of the heat exchanger and containing a control board for operation control, an electrical cable from the outside is connected to the control board at an upper front part of the electrical box. A terminal board to be inserted and connected from below is provided, and a terminal service cover for covering the terminal board is provided.

According to a second aspect of the present invention, in the air conditioner according to the first aspect, a guide is provided on a front surface of the terminal plate to bend while bending the electric cable along a curved surface shape and to guide the electric cable to the terminal plate. It has a cover.

According to a third aspect of the present invention, in the air conditioner according to the second aspect, the electric cable is guided from the rear side of the air conditioner through the lower side of the electrical box to the guide cover. .

According to a fourth aspect of the present invention, in the air conditioner according to the third aspect, the electric box houses the control board inside from the front side, and the guide cover fits therein, and the electric cable. After the terminal service cover is connected to the terminal board.

According to a fifth aspect of the present invention, in the air conditioner according to any one of the first to fourth aspects, the heat exchanger is divided into two parts via an electric expansion valve, and the electric box is connected to the electric box. And at the rear upper portion of the terminal plate and in a shape that can be arranged on the back side of the terminal plate.

According to a sixth aspect of the present invention, in the air conditioner according to any one of the first to fifth aspects, the electrical box is formed of a flame-retardant synthetic resin.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A general home-use separation type air conditioner comprises an indoor unit and an outdoor unit. FIG. 8 is a perspective view of the indoor unit. In this figure, 1
Is a wall-mounted indoor unit, which comprises a main body frame 2 and a front panel 3 attached to the front of the main body frame 2 to form a casing.

The front panel 3 has a suction grill 4 for taking in room air, an outlet 5 for discharging conditioned air that has been cooled / heated inside, and the direction of the discharged conditioned air provided in the outlet 5 in the vertical direction. A horizontal blade 6 to be changed and a number of vertical blades 7 to change the wind direction in the left-right direction are provided. Each of the above components is usually formed of plastic (PS).

FIG. 7 is a front view of a main part showing a state in which the front panel 3 is removed from the indoor unit 1 shown in FIG. 1, 11 is a heat exchanger for cooling / heating the air taken in from the suction grill 4, and 12 is a heat exchanger. The drain pan receives the dew water of the exchanger 11 and is connected to the drain 16 to discharge the drain water generated in the heat exchanger 11 to the outside.

Reference numeral 13 denotes a cross flow fan which discharges air cooled / heated by the heat exchanger 11 from an air outlet, and is driven by a motor 14.

Reference numeral 15 denotes an electrical box, which is provided on the right side of the heat exchanger 11 in the main body frame 2. Heat exchanger 11
Is divided into two blocks in the shape of a square when viewed from the side.

Reference numeral 17 denotes a refrigerant pipe connected to the heat exchanger 11, which is wound integrally with a drain hose 16 with a decorative tape, guided outside from the rear of the main body frame 2, and connected to an outdoor unit. Reference numeral 18 denotes a power cord, which is connected to a control board in the electrical box 15.

In the indoor unit 1 having such a configuration, when the cross flow fan 13 is rotated, the air in the room is guided into the unit 1 from the suction grill 4 and the temperature is adjusted (cooled or heated) by the heat exchanger 11. ), And is discharged from the outlet 5.

Next, the structure of the electrical box of the present invention will be described with reference to FIGS. FIG. 1 shows the electrical box 15 shown in FIG.
It is sectional drawing at the time of cutting in the -A direction. FIG. 2 is a cross-sectional view taken along the line BB shown in FIG.

In FIG. 2, the electrical component box 15 is made of a self-extinguishing and non-dropping flame-retardant synthetic resin (equivalent to 5 VL in UL standard), and has a substrate housing portion 23 having a depth at the center. A terminal plate mounting portion 22, a front guide cover 24, and a front terminal service cover 25 are provided at the top.

The board storage section 23 can vertically store the control board 26, has a box shape having an opening on the front side where the guide cover 24 fits, and has the end face shape of the motor 14 on the side face on the heat exchanger 11 side. Together, a C-shaped recess is formed.

Substrate holding grooves for inserting and holding the control board 26 are formed in the front and rear directions inside the upper wall 34 and the lower wall of the board storage portion 23 so that the control board 26 can be inserted and removed from the front side. .

The terminal plate mounting part 22 is provided at the upper front part of the substrate storage part 23 and is formed integrally with the substrate storage part 23.
This is a box body that internally holds a terminal plate 32 for connecting the control board 26 and the electric cable. A rear wall 33 is formed at the rear of the terminal plate mounting portion 22, and is orthogonal to the upper wall 34 of the board storage portion 23. I have.

Inside the terminal plate mounting portion 22, a rectangular parallelepiped terminal plate 32 is provided with its lower portion inclined forward and the terminal plate mounting portion 2 is formed.
2 is screwed and fixed to a mounting base inside the terminal board 3.
The upper terminal of 2 is wired and connected to the control board 26, and the lower part is formed with an insertion hole 35 for inserting and connecting an electric cable. An electric cable 36 guided from outside the machine is inserted into the insertion hole 35, is sandwiched by a cable fixture (not shown) provided at the back of the insertion hole 35, and is electrically connected to a terminal on the upper side. A protrusion 37 is formed at the center of the terminal plate 32. The electric cable 36 can be detached by pressing the protrusion 37 and pulling the electric cable 36.

FIG. 3 is a front view of the electrical box showing a state where the guide cover is attached. 3, the guide cover 24 covers the front surface as a lid of the electrical component box 15, and the terminal plate 32
Looking down at the bottom.

The lower part of the guide cover 24 has a structure for guiding an external electric cable 36 below the terminal plate 32. The lower left portion of the guide cover 24 is formed one step lower than the lower right portion, and the electric cable 36 is guided along the curved shape to the terminal plate 32 to facilitate wiring.

Holes 27 are formed at both upper and lower ends of the electrical box 15, and the electrical box 15 is screwed and fixed to the main body frame 2 using these three screw holes 27.
Three claw-shaped engaging portions 28 protruding forward are formed on the upper edge and the left edge, and one square hole 29 for fixing the lid is formed on the right edge. The guide cover 24 is fixed to the board storage portion 23 and the terminal plate attachment portion 22 using the square holes 29 and the engagement portions 28. Further, two square holes 29 are formed on the left edge, and one screw hole 31 is formed on the lower part, and the terminal service cover 25 is fixed to the electrical box 15 using these. Reference numeral 30 denotes the control board 26 of the board storage section 23 and the motor 14.
This is a signal line for connecting electrical components such as a sensor and a temperature sensor.

FIG. 4 shows the case where the terminal service cover 25 is
FIG. 5 is a front view showing a state where the terminal service cover 25 is attached to the terminal service cover 25 in a state shown in FIG. 3. The terminal service cover 25 is detachably attached with screws so as to cover the lower portion of the terminal plate 32 and the front surface of the lower left portion 45 of the guide cover 24.

By attaching the terminal service cover 25, the electric cable 36 is locked so as not to move, and by removing the terminal service cover 25, the electric cable 36 can be connected to the terminal plate 32 without opening the front of the electrical box 15. Insertion and removal and inspection can be performed easily.

FIG. 5 shows the guide cover 24.
(A) is a front view, (b) is a DD sectional view of (a),
(C) is a right side view. The guide cover 24 has a rectangular shape from the front as shown in the figure, and the right edge between the upper part 41 and the lower part 42 is connected as shown in FIG.
A U-shaped notch 43 connected by 4 is provided. The lower part 42 is formed in two steps on the left and right, and the lower left part 45 is one step lower than the lower right part 46 and the upper part 41. Substrate holding grooves are formed vertically inside the lower right part 46 and the connecting part 44 to fix the front edge of the control substrate 26.

When the guide cover 24 is assembled to the electrical box 15, the notch 43 is located at the front of the projection 37 and the insertion hole 35 of the terminal plate 32, and the electric cable 36 is passed through the front of the lower left 45. It serves as a guide so that it is bent along the lower left 45 and wired. The lower left portion 45 isolates the inside of the electric box 15 from the electric cable 36, thereby serving as a cover so as not to damage the components inside the electric box 15 when attaching and detaching the electric cable 36.

The electric cable 36 is, as shown in FIG.
From outside the machine, it is guided to the front surface of the guide cover 24 through the rear opening 21 of the main body frame 2 and below the electrical box 15.
The terminal board 32 passes through the front surface of the lower left 45 of the guide cover 24.
Is connected to the terminal plate 32 from below.

In FIG. 5, reference numeral 47 denotes the control board 26.
Is a hole provided so that a changeover switch connected to the switch can be operated from the front side, and a knob of the changeover switch is operated at the time of installing the unit or at the time of service through this hole. In addition,
Reference numeral 48 denotes an insert for fixing the guide cover 24 to the electrical box 15, which is inserted into a square hole 29 formed in the electrical box 15.

FIGS. 6A and 6B show the terminal service cover, wherein FIG. 6A is a front view and FIG. 6B is a right side view. The terminal service cover 25 is a rectangular plate as shown in the figure. Two insertion pieces 48 are formed on the left side, and one screw hole 52 is formed at the lower part. The insertion piece 48 and the screw hole 52 are used to fix to the electrical component box 15.

In FIG. 1, the heat exchanger of the present air conditioner is divided into two upper and lower blocks via an electromagnetic expansion valve S. As shown in FIG. 1, this electromagnetic expansion valve S is located at the rear upper portion of the terminal plate
Since the electromagnetic expansion valve S is arranged on the rear side of the heat exchanger 2, the electromagnetic expansion valve S is easily installed near the heat exchanger 11 and is a suitable place where water is hardly applied. The easy mounting of the electric expansion valve S facilitates the design and manufacture of an air conditioner having a dehumidifying function.

As described above, the terminal board 32 for cable connection to which a voltage of 100 V is applied is housed in a small box (terminal board mounting portion) made of self-extinguishing and non-dropping flame-retardant synthetic resin, and Provided on the upper front side of the large box (substrate storage section) holding the control board 26, even if the terminal plate 32 generates abnormal heat for some reason, this heat is trapped in the box body of the substrate storage section 23. Even if heat is trapped inside the terminal plate mounting portion 22 and a flame is generated, the flame does not propagate to the inside of the electrical box 15 because the fire source is at the top. Further, the lower left portion 45 of the guide cover 24 is lowered backward, and the portion through which the electric cable 36 passes and the control board 26 on which the electric control components are mounted can be separated and wired. The electric cable 36 is connected to the lower part of the terminal plate 32 without being damaged by touching the terminal plate 32, thereby reducing the accumulation of dust on the terminal plate 32 having a function of attracting dust in the air.
Can be prevented from overheating due to electric leakage.

Also, when the terminal service cover 25 is removed at the time of service inspection or the like, the lower part of the terminal plate 32 and the wired electric cable 36 appear, so that the connection of the electric cable 36 is confirmed and the electric cable 36 is removed. Of the control board 26 by the guide cover 24.
Is covered, so that hands and tools, etc.
Work can be done safely without touching the electrical control parts placed on the

Further, the upper part of the rear part of the terminal plate mounting part 22 is provided.
In addition, since a component storage space is formed on the rear side of the terminal plate 32, electric components such as an electric expansion valve can be easily disposed, and design and manufacture of an air conditioner having a dehumidifying function can be facilitated. . In addition, it is possible to commonly use the indoor unit with or without the electric components such as the electric expansion valve in the indoor unit, and the unit can be shared and the manufacturing cost can be reduced.

Although the present invention has been described based on one embodiment, the present invention is not limited to this. In the present embodiment, the terminal plate mounting portion 22 and the board housing portion 23 are formed by an integrated electrical box 15, but they may be formed by separate boxes, respectively.
May be housed in a box and disposed above the board housing unit 23.

Although the present embodiment has been described as a separate type air conditioner, it may be an integrated type air conditioner.

[0041]

According to the first aspect of the present invention, an electric cable is provided by providing a cable connection terminal plate provided at a front upper portion of a box holding the control board and connected to the control board by an electric cable. However, even if it is overheated for some reason, it is unlikely that heat will be trapped, and even if heat is trapped and a flame occurs, the flame will not propagate inside the electrical box, and within the reach of the flame Since there is nothing to burn, it does not substantially lead to burning inside the air conditioner. In addition, by providing the terminal service cover, the electric cable can be connected to the terminal plate without opening the cover of the electric box even though the terminal box is provided in the electric box part. It is possible to prevent the accumulation of dust on the terminal board connection portion.

According to the second and third aspects of the present invention, the guide cover does not damage the control component by touching the control board or the electrical control component on the control board during the connection work of the electric cable, and the guide cover does not damage the control board. By connecting the electric cable with a connection terminal at the bottom, it reduces the accumulation of dust on the terminal plate used in air conditioners that have the function of attracting dust in the air. Overheating can be prevented.

According to the fourth aspect of the present invention, the terminal box has a structure in which the terminal service cover and the guide cover for guiding the electric cable to the terminal plate are fitted in the electric box after the electric box incorporates the terminal board for cable connection together with the control board. Therefore, it is compact and suitable for indoor units of wall-mounted air conditioners.

According to the fifth aspect of the present invention, a storage space is formed above the rear part of the electrical box where water is unlikely to splash near the heat exchanger, which is a suitable place for disposing the electric expansion valve. By arranging the electric expansion valve here, the design and manufacture of the air conditioner having a dehumidifying function is facilitated, and the unit with and without the electric expansion valve can be commonly used. In addition, the manufacturing cost can be reduced.

Further, according to the invention of claim 6, a terminal service cover and a guide cover for guiding an electric cable to the terminal plate are provided, and the electric box thus formed is self-extinguishing and non-dropping flame-retardant. The electrical equipment box of the air conditioner having a flameproof effect is made more practically completed by being made of synthetic resin.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electrical box in one embodiment of the present invention.

FIG. 2 is a side sectional view showing a positional relationship between an indoor unit and an electrical box in the front-rear direction in one embodiment of the present invention.

FIG. 3 is a front view of the electrical box showing a state where the guide cover of the present invention is attached.

FIG. 4 is a front view of the electrical component box of the present invention with a guide cover and a terminal service cover attached thereto.

FIGS. 5A and 5B are diagrams showing a guide cover of the electrical box of the present invention, wherein FIG. 5A is a plan view, FIG. 5B is a left side view, and FIG.

FIGS. 6A and 6B are diagrams showing a terminal service cover of the electrical box of the present invention, wherein FIG. 6A is a plan view and FIG. 6B is a right side view.

FIG. 7 is a main part front view showing a state where a front panel is removed from the indoor unit shown in FIG. 1;

FIG. 8 is a perspective view showing an indoor unit of the separation type air conditioner.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 indoor unit 2 main body frame 3 front panel 11 heat exchanger 15 electrical box 21 rear opening of main body frame 22 terminal board mounting section 23 board storage section 24 guide cover 25 terminal service cover 26 control board 30 conductor section 32 terminal board 36 electricity Cable 45 Lower left of guide cover

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takashi Kawanabe 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Takeshi Yuki 2-5-2, Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Kozo Ninomiya 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3L051 BG06 BH07 BJ03

Claims (6)

[Claims] 1. An air conditioner having at least a heat exchanger therein and an electric box arranged on a side of the heat exchanger and accommodating a control board for operation control. An air conditioner, comprising: a terminal board connected to a control board and to which an external electric cable is inserted and connected from below, and a terminal service cover for covering the terminal board is provided. 2. A guide cover provided on a front surface of said terminal plate and locking and guiding said electric cable to said terminal plate while bending said electric cable along a curved surface shape.
The air conditioner according to item 1. 3. The air conditioner according to claim 2, wherein the electric cable is guided from the rear side of the air conditioner to the guide cover through a lower side of the electrical box. 4. The electric box has a structure in which the guide cover fits after the control board is housed inside from the front side, and a structure in which the terminal service cover fits after connecting the electric cable to a terminal plate. The air conditioner according to claim 3, comprising: 5. The heat exchanger is divided into two parts via a motor-operated expansion valve, and the electrical box has a shape that allows the motor-operated expansion valve to be arranged at the upper rear part of the electrical box and at the rear side of the terminal plate. The air conditioner according to any one of claims 1 to 4, wherein the air conditioner is configured as follows. 6. The air conditioner according to claim 1, wherein said electrical box is formed of a flame-retardant synthetic resin.