JP3172418B2 - Electrical box of air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric box for mounting an electric terminal board for signals and power supply of an air conditioner.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner of this type, particularly an indoor unit of a floor-standing type air conditioner, an electrical box made of hard resin is attached to one side of the use side heat exchanger in a longitudinal direction. A circuit board and terminal board are mounted inside.

[0003] A terminal board attached to the above-mentioned electrical box includes:
There is a signal terminal board for sending and receiving control signals to and from the outdoor unit, and a power terminal board for sending and receiving power to and from the outdoor unit. In consideration of the space efficiency of the electrical box, these terminal boards were mounted vertically.

[0004]

In this type of air conditioner, when one indoor unit is installed for one outdoor unit, the power supply is first connected to the terminal board for the power supply of the indoor unit. Then, power is supplied to the outdoor unit from a signal terminal board of the indoor unit. In this case, the wiring for signal and power supply between the indoor unit and the outdoor unit is all connected to the signal terminal board of the indoor unit. However, no problem arises.

[0005] However, when a plurality of indoor units are installed for one outdoor unit, the power is first connected to the outdoor units, and the power is distributed to and supplied to each indoor unit. Therefore, when the respective terminal boards are attached to the upper and lower sides as described above, the wiring between the indoor unit and the outdoor unit is divided into upper and lower parts for signals and for the power supply in the electrical box of the indoor unit. The connection must be made, and the connection work becomes extremely complicated.

On the other hand, if the power supply and signal terminal boards are mounted on the left and right sides in the electrical box of the indoor unit, wiring connection becomes extremely easy in any of the above cases. There was a problem that the mold had to be changed, causing a rise in cost.

An object of the present invention is to solve the above-mentioned conventional technical problem, and an object of the present invention is to provide an electric equipment box of an air conditioner which can change the arrangement state of a terminal board at low cost. Things.

[0008]

The electrical box of the present invention is for mounting an electrical terminal board of an air conditioner, and has an attaching portion to which the terminal board is attached in a first arrangement state. It is attached to the main body and this main body detachably,
A terminal board is provided with the terminal board mounted in the second arrangement state.

According to the present invention, it is possible to change the arrangement state of the terminal board simply by attaching the terminal board base to the existing or slightly modified electric box of the existing one. Therefore, it is not necessary to prepare an electrical box for each model of the air conditioner, and the versatility of the electrical box is increased, so that an increase in production cost can be suppressed to a minimum.

According to a second aspect of the present invention, there is provided an electrical component box comprising an engaged portion formed mainly in the above, and an engaging portion formed on the terminal board base and detachably engaged with the engaged portion. The terminal board base is positioned at a predetermined position of the main body in a state where the engaging portion is engaged with the engaged portion, and is screwed to the main body in that state.

According to the second aspect of the present invention, in addition to the above, the terminal board base is attached to the main body only by engaging and screwing.
In particular, by detachably engaging the engaging portion of the terminal board base with the engaged portion of the main body, the terminal board base is positioned at a predetermined position, so that the subsequent screwing work becomes extremely easy,
The assembling workability is further improved.

According to a third aspect of the present invention, in addition to the above, the main body is provided with upper and lower mounting portions for vertically attaching a terminal board at a lower end portion, and an engaged portion between the upper and lower mounting portions. Has an engaging portion at the upper end and left and right attachment portions for attaching terminal boards on the left and right below the engaging portion.

According to the third aspect of the present invention, the engaging portion at the upper end of the terminal board can be engaged with the engaged portion between the upper and lower mounting portions at the lower end of the main body from below. The mounting and dismounting of the board base is further facilitated. In addition, by installing and removing the terminal board base, the terminal board is changed between a state where it is mounted vertically and a state where it is mounted on the left and right, so that it can easily respond to various combinations of indoor units and outdoor units of air conditioners. It becomes.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view of an indoor unit 1 of an air conditioner as an embodiment to which the present invention is applied, FIG. 2 is a front view of an electrical box 2 of the present invention, FIG. 4 and 5 show a side view and a plan view, respectively.

In each of the figures, a use-side heat exchanger 7 is attached to the center of the front surface of a steel plate frame 6 constituting the indoor unit 1 on the left side as viewed from the left. , The electrical component box 2 is vertically mounted between the right side surface 6A of the frame 6.

A cross flow fan 8 is mounted on the left and right above the heat exchanger 7, and the fan 8 is driven to rotate by a motor 8M mounted on the electrical box 2 side. A cross flow fan 9 is also mounted on the left and right below the lower part of the heat exchanger 7, and this fan 9 is also driven to rotate by a motor 9 </ b> M mounted on the electrical box 2 side.

The heat exchanger 7 is connected to a plurality of heat exchange fins 14 arranged at predetermined intervals between the left and right tubesheets 13 and a condensing unit (not shown) on the outdoor unit side, through which refrigerant flows. And a hot water pipe 12 connected to a boiler (not shown) on the outdoor unit side via a variable flow rate valve 10 and through which hot water flows. Each of the pipes 11 and 12 includes a tube sheet 13 and It is provided in a meandering manner through the heat exchange fins 14. In addition, this heat exchanger 7
A temperature sensor 18 and a humidity sensor 19 are attached by a fixture 17 to the right side of the front of the device.

The interior of the electrical box 2 is made of a hard synthetic resin and is vertically long. An operation panel 21 is mounted on the upper end of the electrical box 2, and a circuit board 22 on which control circuit parts are mounted below the operation panel 21. A circuit board 23 to which circuit components are mounted is mounted, and a terminal board 24 for power supply and a terminal board 26 for signal are mounted at the lower end.

A drain pan 27 is provided below the heat exchanger 7 across the left and right. This drain pan 27 has a float switch 2 for detecting the full water due to clogging.
A drain hose 29 is connected to the drain pan 27 and pulled out rearward.

An indoor unit cover 31 is attached to the frame 6 from the front so as to cover up these components. The heat exchanger 7 is provided at the center of the front surface of the cover 31.
A slit-shaped suction port 32 is formed in front of the suction port 32, and a filter 33 is provided between the suction port 32 and the heat exchanger 7.
Is interposed. The filter 33 is held by the cover 31 so that it can be pulled out and inserted upward.

Upper and lower outlets 36, 37 are formed on the front surface of the cover 31 above and below the inlet 32, respectively. The upper and lower outlets 36, 37 are formed in the outlets 36, 37, respectively. Each is movably mounted.
Upper and lower flaps 71 and 72 for adjusting the upper and lower blowing directions are attached to the upper and lower outlets 36 and 37, respectively, and these upper and lower flaps 71 and 72 are driven by flap motors 73 and 74 at the right ends.

With the above configuration, during the cooling operation, the heat exchanger 7
A pressurized refrigerant is supplied to the refrigerant pipe 11 from the condensing unit of the outdoor unit, and the refrigerant pipe 11 exerts a cooling function by an endothermic effect generated by evaporation. During the cooling operation, the motors 8M and 9M are operated, and the cool air exchanged with the heat exchanger 7 is sucked by the upper fan 8 and the lower fan 9 of the heat exchanger 7, and the upper outlet 36 and the lower outlet 37 are drawn.
From the room.

The operation of the compressor of the condensing unit and the operation of the motor 8M are controlled based on the temperature sensing operation of the temperature sensor 18 (control by the control device on the substrate 22 and the control device on the outdoor unit side), whereby the indoor temperature is reduced. Maintain at set temperature.

Next, during the heating operation, hot water is supplied from the boiler of the outdoor unit to the hot water pipe 12 of the heat exchanger 7 to exert a heating effect. During this heating operation, the motors 8M, 9
M is operated, and the warm air exchanged with the heat exchanger 7 is sucked by the upper rear fan 8 and the lower rear fan 9 of the heat exchanger 7 and is blown into the room from the upper outlet 36 and the lower outlet 37. .

The operation of the variable flow rate valve 10 for controlling the amount of hot water supplied to the heat exchanger 7 and the operation of the motors 8M and 9M are controlled by the temperature sensor 1
8 (control by a control device on the substrate 22 or a control device on the outdoor unit side) based on
Maintain the room temperature at the set temperature.

In the dry operation, both the refrigerant and the hot water are supplied to the heat exchanger 7. This dry operation is controlled based on the detection operation of the humidity sensor 19 (control by the control device on the substrate 22 or the control device on the outdoor unit side), thereby maintaining the indoor humidity at the set humidity.

Next, the structure of the electrical box 2 of the present invention will be described with reference to FIGS. The electrical box 2 includes a vertically long main body 5 made of a hard synthetic resin and a terminal board 3. The main body 5 has a side surface 5A on the right side, and the left side of the main body 5 is shaped to escape the motors 8M and 9M. Further, mounting holes 41 to the frame 6 are formed on both sides and a lower end of the upper end.
A panel mounting portion 42 for mounting the first mounting portion 1 is formed.

Further, substrate holding grooves 43 for inserting and holding the substrate 23 are formed vertically inside the side surface 5A, and the substrate 22 is inserted and held on the left side toward the center. Holding grooves 44, 44 are formed vertically. Further, a transformer mounting portion 46 for mounting a transformer (transformer) is formed below the substrate holding groove 43.

The lower end of the main body 5 below the transformer mounting portion 46 becomes narrower, and has an upper mounting portion 47 and a lower mounting portion 48 for vertically mounting the terminal boards 26 and 24 thereon.
Are formed above and below. Holes 51 and 52 for screwing are formed in each of the mounting portions 47 and 48, and a lower end portion 5B of the side surface 5A is located on the right side thereof.

An engaged portion 49 made of a rectangular hole is formed between the upper mounting portion 47 and the lower mounting portion 48, and the terminal board is provided beside the mounting hole 41 at the lower end. A hole 51 for screwing the base 3 is formed. In addition, each of the mounting portions 47 and 48 has an inclined surface having a lower portion on the front side in consideration of space efficiency in the front-rear direction, and the engaged portion 49 is formed on the upper surface of the lower mounting portion 48. ing.

On the other hand, the terminal board base 3 is also formed of the same hard synthetic resin as the main body 5, and has a rectangular base 52, left and right rear projecting walls 53 projecting rearward from the rear surface of the base 52,
54, a front protruding wall 56 protruding forward across the upper edge and the left edge of the base 52 on the left side of the left rear protruding wall 53, and left and right rear protruding walls 53, 54. Base 5
2 and a claw-shaped engaging portion 57 protruding upward from the upper edge.

The terminal boards 26, 2
Left mounting part 58 and right mounting part 5 for mounting 4 on the left and right
9 are formed on the left and right sides, and holes 61 and 62 for screwing are formed in the mounting portions 58 and 59, respectively. A hole 63 for screwing for fixing to the main body 5 is formed at the center of the front surface of the base 52, and a hole 64 for screwing for fixing to the frame 6 is formed at the lower end of the base 52. Has been drilled.

Further, the width between the outer surfaces of the left and right rear projecting walls 53 and 54 is set to be equal to or slightly smaller than the width of the lower mounting portion 48 of the main body 5.
The upper rear end surface of each of the third and fourth portions 54 is formed as an inclined surface 66 along the inclination of the lower mounting portion 48, and a projection 67 projecting rearward is formed below the inclined surface 66.

In the above-described configuration, for example, in the case of a model (conventional) in which one indoor unit 1 is provided for one outdoor unit, the terminal board 26 for signals is provided without mounting the terminal board base 3.
And a power supply terminal board 24 are mounted vertically. That is, hole 5
The terminal board 26 for signal is screwed into the upper mounting portion 47 using the screw 1, and the terminal board 24 for power supply is screwed into the lower mounting portion 48 using the hole 52 below the terminal board 26.

When one indoor unit 1 is installed for one outdoor unit as described above, the power supply is first connected to the terminal board 24 for the power supply of the indoor unit 1, and the outdoor unit is connected to the indoor unit. Power is supplied from the signal terminal board 26 of the machine 1. Therefore, the signal wiring and the power supply wiring between the indoor unit 1 and the outdoor unit are all connected to the signal terminal board 26 of the indoor unit 1, so that the terminal boards 26 and 24 are vertically connected. Even if it is attached, no problem occurs.

Next, for example, in the case of a so-called multi model in which a plurality of indoor units 1 are provided for one outdoor unit, the terminal board 26 is used to connect the signal terminal board 26 and the power supply The terminal board 24 is mounted on the left and right.

When attaching the terminal board base 3 to the main body 5, the engaging portion 57 at the upper end of the terminal board base 3 is engaged with the engaged portion 4 of the main body 5.
9 from below, and after detachably engaging the front edge of the engaged portion 49 as shown in FIGS.
4 is brought into close contact with the front surface of the lower mounting portion 48 of the main body.

At this time, the lower end 5B of the side surface 5A corresponds to the outside of the right rear projecting wall 54 of the terminal board base 3, and the projecting wall 5
The front ends of the upper surfaces of the members 3 and 54 are in contact with the upper surface of the lower mounting portion 48 in front of the engaged portion 49, and the projection 67 is in contact with the lower end of the main body 5. As a result, the terminal board base 3 cannot move up, down, left, right, and rear, and is positioned.

In this positioning state, the holes 63 of the terminal board 3 correspond to the holes 51 of the main body 5, and the terminal board 3 is detachably screwed to the main body 5 from the front using both holes. In this state, the base 52 of the terminal board 3 is in a substantially vertical state.

After fixing the terminal board base 3 to the main body 5 in this manner, the signal terminal board 26 is screwed into the left mounting portion 58 using the hole 61 and the right hole 62 is used. The terminal board 24 for the power supply is screwed into the right mounting part 59.

When a plurality of indoor units 1 are installed for one outdoor unit as described above, the power supply is first connected to the outdoor units, and the power is distributed and supplied to each indoor unit 1 therefrom. Taken. For this reason, the wiring for power supply (two wires) among the wiring for signal and power supply (three wires) between the indoor unit 1 and the outdoor unit.
Is connected to the terminal board 24, and the signal wiring (one line) is connected to the terminal board 26.
And 24 are arranged on the left and right, so that the connection operation is extremely easy.

In the embodiment, the state where the terminal boards are arranged vertically (first arrangement state) and the state where the terminal boards are arranged left and right (second arrangement state) are described as examples. However, the present invention is not limited to this.
The present invention is effective in various arrangement states.

[0043]

As described in detail above, according to the present invention, an existing electrical box or a slightly modified version of an existing electrical box is used as a main body, and the terminal board arrangement state can be changed simply by attaching the terminal board base to this main body. Since it is possible to change, there is no need to prepare an electrical box for each model of the air conditioner, the versatility of the electrical box increases, and a rise in production cost can be minimized. Things.

According to the second aspect of the present invention, in addition to the above, the terminal board base is attached to the main body only by engaging and screwing. In particular, by detachably engaging the engaging portion of the terminal board base with the engaged portion of the main body, the terminal board base is positioned at a predetermined position, so that subsequent screwing work becomes extremely easy, and assembling workability is improved. Is further improved.

Further, according to the third aspect of the present invention, the engaging portion of the upper end of the terminal board can be engaged from below with the engaged portion between the upper and lower mounting portions of the lower end of the main body. In addition, attachment and detachment of the terminal board base is further facilitated. In addition, by installing and removing the terminal board base, the terminal board is changed between a state where it is mounted vertically and a state where it is mounted on the left and right, so that it can easily respond to various combinations of indoor units and outdoor units of air conditioners. It becomes.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an indoor unit of an air conditioner as an embodiment to which the present invention is applied.

FIG. 2 is a front view of the electrical box of the present invention.

FIG. 3 is a front view of a terminal board base.

FIG. 4 is a side view of the terminal board base.

FIG. 5 is a plan view of a terminal board base.

FIG. 6 is an exploded perspective view of a main terminal block of the electrical box.

FIG. 7 is a vertical sectional side view of a lower part of an electrical box.

[Explanation of symbols]

 Reference Signs List 1 indoor unit 2 electrical box 3 terminal board 5 main body 24, 26 terminal board 47 upper mounting section 48 lower mounting section 49 engaged section 57 engaging section 58 left mounting section 59 right mounting section

Claims (3)

(57) [Claims] 1. An electrical box for mounting an electrical terminal board of an air conditioner, comprising: a main body having a mounting portion to which the terminal board is mounted in a first arrangement state; and a detachably mounted main body. ,
An electrical box for an air conditioner, comprising: a terminal board base on which the terminal board is mounted in a second arrangement state. 2. An engaged portion formed on a main body, and an engaging portion formed on a terminal board base and detachably engaged with the engaged section, wherein the terminal board base includes The air conditioner according to claim 1, wherein the joining portion is positioned at a predetermined position of the main body while being engaged with the engaged portion, and is screwed to the main body in that state. Electrical box. 3. A main body comprising an upper and lower mounting portion for vertically mounting a terminal board at a lower end portion, an engaged portion between the upper and lower mounting portions, and a terminal board base having an engaging portion at an upper end portion and a lower portion below the engaging portion. The electrical box for an air conditioner according to claim 2, further comprising left and right attachment portions for attaching terminal boards to left and right.