JP2006343083A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of preventing intrusion of chips, which are generated in fastening a screw when an electric component storing portion is fixed to a main body, into a control board and an electric component, and improving reliability of the electric component. <P>SOLUTION: In this air conditioner comprising the main body 1 comprising a suction opening 12 and a blow out opening 13, a blower 8 placed in opposition to the suction opening 12, and the electric component storing portion 9, the electric component storing portion 9 is fixed to the main body 1 by means of the fixing screw 28, and provided with a chip receiving portion 27B positioned at a lower portion of the fixing screw 28 in assembling to receive the chips generated when the fixing screw 28 is fastened in assembling. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner that is a built-in type that is attached to the back of a ceiling, and is an indoor unit that communicates with, for example, a blowout opening provided in a ceiling plate via a duct.

When air-conditioning a wide space such as a store, a built-in type installed on the back of the ceiling is more advantageous than a so-called wall-mounted type that is attached to a wall surface as an indoor unit of an air conditioner. In other words, this type of indoor unit communicates with a plurality of outlets provided in the ceiling plate through ducts, and can uniformly blow heat exchange air over the entire room, providing comfortable air conditioning, and is also wall-mounted. There is no feeling of oppression that the resident receives like.
In the built-in type air conditioner indoor unit, it is desired that the height of the indoor unit main body is made as small as possible to reduce the space required for installation so that the indoor unit can be installed even in a narrow space behind the ceiling. .
[Patent Document 1] discloses an air conditioner in which an electric component box is accommodated in a main body and the main body is miniaturized.
Japanese Utility Model Publication No. 2-77509

  In the air conditioner as described above [Patent Document 1], a screw is used when the electric component box is attached and fixed to the main body, and chips generated by tightening and fixing the screw enter the electric component box. However, the internal control board and electrical components may be adversely affected.

  The present invention has been made by paying attention to the above circumstances, and the purpose of the present invention is to apply the chips generated by tightening the screws to the control board and the electrical components when the electrical component housing portion is fixed to the main body. An object of the present invention is to provide an air conditioner that can prevent intrusion and improve the reliability of electrical components.

  In order to solve the above-described problems and achieve the object, an air conditioner of the present invention includes an air body including a main body having a suction port and a blow-out port, a blower accommodated facing the suction port, and an electrical component housing unit. In the harmony device, the electrical component housing portion includes a chip receiving portion that is fixed to the main body with a screw, is positioned below the screw at the time of assembly, and receives chip generated by tightening the screw at the time of assembly.

  According to the present invention, it is possible to prevent the chips generated by tightening screws when the electric component housing portion is fixed to the main body from entering the control board and the electric component and to improve the reliability of the electric component. Play.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view for explaining the installation state of a built-in type air conditioner indoor unit according to an embodiment of the present invention, FIG. 2 is a schematic longitudinal sectional view of the air conditioner indoor unit, and FIG. FIG. 4 is a cross-sectional perspective view showing an electrical component housing portion, and FIG. 4 is an exploded perspective view showing a part of the indoor unit.

The main body 1 that is a housing is formed in a thin rectangular box shape in which the dimension in the longitudinal direction X in the longitudinal section of FIG. 2 is a direction that is perpendicular to the longitudinal direction X, compared to the width direction Y. The bottom surface is composed of bottom plates 1a and 1b, the top surface is composed of a top plate 1c, both side surfaces are composed of side plates 1d and 1d, and the back surface is composed of a back plate 1e. Each surface portion is formed by sheet metal processing of a thin metal plate.
A pair of attachments 2 are provided on both side surfaces of the main body 1, and a suspension rod 4 suspended from a beam member 3 provided on the ceiling back T is inserted into each of the attachments 2, and Installation fixed. That is, the main body 1 is provided on the ceiling back T between the beam member 3 and the ceiling plate 5.

  A partition plate 6 is provided between the side plates 1 d and 1 d in the width direction Y of the main body 1 at a substantially half length position in the longitudinal direction X in the main body 1. The inside of the main body 1 is divided by a partition plate 6, and the one chamber is called a machine chamber 7 </ b> A, and the blower 8 and the electrical component housing portion 9 are arranged. The other chamber is called a heat exchange chamber 7B, and a heat exchanger 10 and a drain pan 11 are arranged.

  A suction port 12 is opened on the lower surface of the machine room 7A, and a blowout port 13 is opened on the front side (left side in FIG. 2) of the heat exchange chamber 7B. A dust collection filter 22 that covers the opening is attached to the suction port 12. In a state where the main body 1 is attached and fixed to the ceiling T, a suction duct 14 is connected to the suction port 12, and a plurality of outlet ducts 15 are connected to the outlet 13.

  The suction duct 14 is connected to a decorative grill 17 attached to an attachment port 16 that opens to the ceiling board 5. Depending on the dimension between the beam member 3 and the ceiling plate 5, the suction port 12 provided in the main body 1 may directly face the mounting port 16 of the ceiling plate 5. At this time, naturally, the suction duct 14 is omitted and the decorative grill 17 is attached to the attachment port 16.

  The blowout duct 15 normally communicates with a plurality of indoor blowout openings (not shown) provided on the ceiling board 5. That is, the heat exchange air led out from the main body 1 is diverted by the blowout duct 15 and blown into the room from a plurality of indoor blowout openings at the same time, so that uniform air conditioning can be performed regardless of the indoor part.

  The blower 8 disposed in the machine room 7A is provided with a fan motor 18 in the central portion in the axial direction, and this fan motor 18 is a biaxial motor with a rotating shaft protruding from both sides. Each rotary shaft is connected to a fan (so-called multi-blade fan) 19 of a type that sucks air from the axial direction and blows it in the circumferential direction as it rotates, and each fan 19 is surrounded by a fan casing 20. The

  A suction port 20 a for sucking air is opened on both side surfaces of the fan casing 20, a blow-off port body portion 20 b is formed at the end of the partition plate 6, and a blow-out is made to the communication port 21 opened in the partition plate 6. The mouth part 20b is connected. Therefore, the communication port 21 can directly guide the air blown from the outlet body portion 18a of the fan casing 18 to the heat exchange chamber 7B side as the fan 8 is energized and the fan 17 is driven.

  The electrical component accommodating portion 9 disposed in the machine room 7A accommodates electrical components such as a control board 23 and a terminal block 24 which will be described later.

The heat exchanger 10 disposed in the heat exchange chamber 7B has end plates (not shown) disposed on both side ends thereof, and a plurality of aluminum fins 10a are arranged in parallel with a predetermined gap between the end plates. This is a fin-tube heat exchanger in which a plurality of heat transfer tubes 10b are penetrated through both end plates and aluminum fins 10a. The heat exchanger 10 is placed on the drain pan 11 in a posture in which the vertical direction is inclined obliquely.
This is because the vertical dimension of the heat exchanger 10 is set to a sufficient length because it is necessary to reduce the vertical dimension of the main body 1 as much as possible in view of the fact that the main body 1 is installed on the ceiling T. Can not do it. On the other hand, the heat exchange area of the heat exchanger 10 must be ensured as much as possible to improve the heat exchange efficiency. Therefore, by adopting a posture in which the heat exchanger 10 is inclined obliquely, the vertical dimension can be suppressed and the heat exchanger 10 can be accommodated in the thin main body 1 and a sufficient heat exchange area can be secured.

  The drain pan 11 is a molded product obtained by foaming a foamable synthetic resin material such as expanded polystyrene, and the upper surface side thereof is coated with a synthetic resin material such as acrylonitrile, butadiene, styrene resin (ABS resin). In the state where the dimensions in the longitudinal direction X and the width direction Y of the drain pan 11 are formed substantially the same as the dimensions in the longitudinal direction X and the width direction Y of the heat exchange chamber 7B, and the drain pan 11 is attached to the heat exchange chamber 7B. The drain pan 11 is fitted over the entire surface of the heat exchange chamber 7B with almost no gap.

  The lower surface of the main body 1 is covered with the first lower surface plate 1a except for the suction port 11 provided in the machine chamber 7A, and the entire lower surface of the heat exchange chamber 7B is covered with the second lower surface plate 1b. These first and second lower surface plates 1a and 1b are detachably attached to the main body 1 via attachment screws.

Next, the electrical component housing portion 9 disposed in the machine room 7A will be described with reference to FIGS. Note that FIG. 3 shows the installation state upside down.
The electrical component housing portion 9 is disposed on one end side in the axial direction of the blower 8 so as to face the suction port 20 a provided in the fan casing 20.

  The electrical component housing portion 9 includes a sheet metal box 9A and a lid 9B that is detachably attached to the box 9A. Here, the upper surface portion of the electrical component housing portion 9 is 9a, the bottom surface portion is 9b, the side surface portion on the fan casing 20 side is 9c, and the side surface portion on the side plate 1d side of the main body 1 is 9d. Further, the side surface portion 9c is provided with an inclined surface portion 9e that is inclined so that the distance from the side surface portion 9d decreases from the bottom surface portion 9b toward the upper surface portion 9a. And the box 9A has an opening part from this inclined surface part 9e to the upper surface part 9a, and the cover body 9B is attached so that this opening part may be plugged up.

  A terminal block fixing plate 26 is provided in the box 9A in the X direction. The terminal block fixing plate 26 includes a lower horizontal portion 26a provided substantially parallel to the bottom surface portion 9b at a height position substantially half of the box 9A, an inclined portion 26b provided with an acute angle with the lower horizontal portion 26a, It is a plate material that is provided facing the upper surface portion 9a and is composed of an upper horizontal portion 26c that forms a part of the upper surface portion 9a, and the inside of the box 9A is partitioned into two chambers by this terminal block fixing plate 26, One chamber is referred to as an electric component installation portion 27A, and the control board 23 and the terminal block 24 described above are arranged. The other chamber is called a chip receiving portion 27 </ b> B, so that chips generated by tightening and fixing the fixing screw 28 during assembly work described later do not fall on the control board 23 located below the fixing screw 28.

In the electrical component installation portion 27A, the control board 23 is attached on the bottom face portion 9b, and the terminal block 24 is attached to the inclined portion 26b of the terminal block fixing plate 26 of the control board 23.
The wiring from the outdoor unit (not shown) or the operation unit (not shown) and the wiring in the main body 1 are connected via the terminal block 24.

  A fixing piece 25 for fixing the box body 9A is provided on the upper portion (end portion on the suction port 12 side) of the side plate 1d of the main body 1. The fixing piece 25 is provided with a hole 25a for a fixing screw 28. ing. On the other hand, the box body 9 </ b> A is provided with a hole 25 b corresponding to the hole 25 a of the fixing piece 25 in the upper horizontal portion 26 c of the terminal block fixing plate 26. The main body 1 and the box 9A are fixed by inserting and fixing the fixing screws 28 into the holes 25a and 25b.

The lid 9B is provided with a hole 29b at a position corresponding to the hole 29a provided at the upper horizontal portion 26c of the terminal block fixing plate 26, and a slit 31 at a position corresponding to the locking piece 30 provided at the side surface portion 9c. Is provided.
The lid body 9B is attached to the box body 9A by inserting the locking piece 30 into the slit 31 and inserting the fixing screws 29 into the holes 29a and 29b and tightening and fixing.

In order to attach the electrical component housing 9 configured in this way to the machine room 7A when the main body is assembled, the work is performed with the main body 1 turned upside down from the actual mounting state. That is, the top plate 1c is on the lower surface side, and the lower surface plate 1a and the suction port 12 are on the upper surface side.
First, the box 9A is disposed in a space between the fan casing 20 and the side plate 1d of the main body 1, and then the upper surface portion 9a and the fixed piece 25 are brought into contact with each other. In this state, since the hole 25a of the fixing piece 25 faces the hole 25b provided in the upper surface portion 9a, the fixing screw 28 is inserted into these holes 25a and 25b to be fastened and fixed.
When the fixing screw 28 is fastened and fixed, chips are generated from the fixing piece 25 and the box 9A as the fixing screw 28 advances. However, since the above-described chip receiving portion 27B is provided below the hole 25b, the chip does not fall on the control substrate 23, and it is possible to prevent malfunction or short-circuit due to adhesion of the chip. .

When performing maintenance work such as maintenance / inspection of the electrical component housing portion 9, the lower surface plate 1a of the main body 1 is removed, and the lid body 9B is further removed from the box body 9A to expose the interior of the electrical component installation portion 27A.
At this time, since the terminal block 24 is attached to the inclined portion 26b of the terminal block fixing plate 26, the state of the terminal block 24 can be confirmed even from below, and the terminals of various wirings can be easily attached and detached.

  Further, since the fixing piece 25 for fixing the box 9A to the main body 1 is provided at the end of the main body side plate 1d on the suction port 12 side, the fixing screw 28 can be easily removed from below, so that the box The body 9A can be easily attached and detached.

When the maintenance work is completed, when the box 9A is mounted in the main body 1, the control board 23 is positioned on the upper surface side and the fixing screw 28 is positioned on the lower surface side. Even in this case, the chips do not adhere to the control board 23.
Further, since the inclined surface portion 9c of the electric component housing portion 9 guides air to the fan casing suction port 20a, even if the electric component housing portion 9 is arranged in the machine room 7B, the air blowing efficiency is not lowered. By storing the component accommodating part 9 in the main body 1, the space required for installation of the air conditioner indoor unit can be reduced.

  Further, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

The figure explaining the attachment state of the air conditioner indoor unit based on one embodiment of this invention. Sectional drawing of the outline of the air conditioner indoor unit based on the embodiment. The cross-sectional perspective view which shows the electrical component accommodating part based on the embodiment. The figure which decomposed | disassembled some indoor units based on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12 ... Suction inlet, 13 ... Outlet, 1 ... Main body, 8 ... Blower, 9 ... Electrical component accommodating part, 9A ... Box, 9B ... Lid, 27A ... Electrical component installation part, 27B ... Chip receiving part, 23 ... Control board, 24 ... Terminal block, 26 ... Terminal block fixing plate

Claims (2)

  An air conditioner comprising: a main body provided with a suction port and a blowout port; and a blower and an electric component housing portion that are housed in the main body so as to face the suction port, wherein the electric component housing portion is screwed into the main body. An air conditioner comprising: a chip receiving portion that is fixed at the bottom of the screw and that is positioned below the screw during assembly and that receives chip generated by tightening the screw. The air conditioner according to claim 1, wherein the chip receiving portion is provided on a terminal block fixing plate attached to the electric component housing portion.

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