JP5369028B2 - Air conditioner indoor unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the indoor unit of an air conditioner reducing the number of parts constituting a casing, reducing assembly man-hours, facilitating installation work by reducing the weight, reducing the number of heat insulating members arranged on an inner surface of the casing, and improving transport efficiency and productivity. <P>SOLUTION: The indoor unit 1 of the ceiling-embedded type air conditioner includes the casing 2 having a top plate part 2a and a side plate part 2d; a decorative panel 3 attached to a lower end opening of the casing 2 from an indoor side, having a suction port 4 on the center, and having a plurality of blowout ports 5 on the outer periphery; a centrifugal fan 9 and a fan motor 10 rotating the centrifugal fan disposed in the center of the top plate part of the casing; and a heat exchanger 11 installed to surround the outer periphery of the centrifugal fan. The casing 2 having the top plate part 2a, the side plate part 2d, and an inner wall 2b arranged on the inner side of the side plate part 2d and forming a double structure with the side plate part 2d, is constituted by an integrally molded article by a hard synthetic resin. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an indoor unit of a ceiling-embedded air conditioner, and more particularly to a housing structure.

  In general, indoor air conditioners for commercial use tend to have a large presence in the room, and embedded ceiling air conditioners that are relatively easy to install.

The ceiling-embedded air conditioner is embedded in or near the ceiling by being fixed to anchor bolts suspended in the ceiling.
The inlet and outlet of the air conditioner are open toward the interior of the room, and operate as an air conditioner by attaching a decorative panel equipped with a wind direction guide plate and a filter for removing dust (for example, patents) Reference 1).

JP 11-444333 A (first page, FIG. 2)

A casing that is a casing having a top plate and a side plate in an indoor unit of a conventional ceiling-embedded air conditioner described in Patent Document 1 is made of a steel plate in order to ensure a certain degree of strength. In order to fix the indoor unit main body configured with a heat insulating material on the outer surface to the anchor bolt, the indoor unit is bolted using a total of 12 points of 4 hanging brackets and 8 hanging bracket fixing bolts. The main body is fixed to the anchor bolt.
For this reason, the number of work steps for tightening the bolts is large and time-consuming, and since the casing constituting the indoor unit body is made of steel plate, it is heavy and burdens when lifting the indoor unit body during installation, degrading workability. There was a problem.

In addition, in order to insulate the air path of the air conditioner from the outside, heat insulating material such as polystyrene foam is placed on the inner and outer surfaces of the casing, so that the casing is not cooled during cooling operation, so that condensation on the outer casing Is preventing.
Since this heat insulating material is disposed along the inner and outer surfaces of the outer wall of the air conditioner due to its role, for example, when integrally molded with polystyrene foam, it has a bowl-like shape.
For this reason, there exists a problem that the transport efficiency at the time of transporting the shape | molded heat insulating material to an air-conditioner assembly place is bad.
In addition, there is a method of sticking a plate-like heat insulating material for each side of the housing, but there is a problem that the number of parts to be attached increases and the number of assembling steps increases too much.

  The present invention has been made in order to solve the above-described problems. The number of parts constituting the casing is reduced, the number of assembly steps is reduced, the weight is reduced, and the installation work is facilitated. An object of the present invention is to obtain an indoor unit of an air conditioner that can reduce the number of heat insulating materials arranged on the inner surface and can improve transport efficiency and productivity.

An indoor unit of an air conditioner according to the present invention includes a housing having a top plate portion and a side plate portion, a lower end opening of the housing mounted from the indoor side, a suction port in the center, and a plurality of outlets on the outer periphery. A decorative panel, a centrifugal fan installed at the center of the top plate portion of the housing, a fan motor for rotating the centrifugal fan, and a heat exchanger installed so as to surround the outer periphery of the centrifugal fan. In a ceiling-embedded indoor unit of an air conditioner, a double structure in which an air layer of a cavity portion is provided between the top plate portion, the side plate portion, and the side plate portion and between the side plate portions. possess a wall, a forming and a casing constituted by integral molding by a hard synthetic resin, and a fixing portion for anchoring provided to protrude from the side plate portion, it is attached to the anchor fixing portion of the housing And a fall prevention member made of sheet metal .

  In the indoor unit of the air conditioner of the present invention, by arranging the inner wall inside the side plate portion of the housing and making the side wall a double wall structure, by providing heat insulation by the air layer of the cavity, It is only necessary to provide a heat insulating material on the top plate portion, and the heat insulating member inside the housing can be reduced, and there is an effect that transportation efficiency and productivity can be improved.

Sectional drawing which shows the whole structure of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. The front view of the decorative panel of the indoor unit of the air conditioner. Sectional drawing which shows the whole structure of the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing the overall configuration of an indoor unit of an air conditioner according to Embodiment 1 of the present invention, and FIG. 2 is a front view of a decorative panel of the indoor unit of the air conditioner.
In FIG. 1, an indoor unit 1 of a ceiling-embedded air conditioner according to Embodiment 1 of the present invention includes a housing 2 having a top plate portion and a side plate portion embedded in an upper side of a ceiling 50, and this housing. A rectangular flat panel-like decorative panel 3 is provided in the lower end opening of the body 2 from the indoor side.
As shown in FIG. 2, the decorative panel 3 is formed with a suction port 4 so as to be positioned at the center thereof, and four blowout ports 5 are formed on the outer periphery of the suction port 4.

The housing 2 is disposed on the inner side of the top plate portion 2a, the side plate portion 2d, the side plate portion 2d, the anchor fixing portion 2c that is fixed to the anchor bolt 51, and the side plate portion 2d. 2d and an inner wall 2b having a double wall structure, and these are constituted by an integrally molded product made of hard synthetic resin such as glass-filled ABS resin.
The inner wall 2b of the housing 2 is disposed outside the blowing air passage 16, and the side plate portion 2d is disposed outside the inner wall 2b with the air layer interposed therebetween.

A centrifugal fan 9 and a fan motor 10 for rotating the centrifugal fan 9 are installed in the center of the top plate portion 2 a of the housing 2, and a heat exchanger 11 is installed so as to surround the outer periphery of the centrifugal fan 9. . A plate-like heat insulating member 12 is installed on the inner surface of the top plate portion 2 a of the housing 2.
A bell mouth 13 is disposed between the centrifugal fan 9 and the suction port 4, and a suction grill 14 and a filter 15 are attached to the suction port 4.
A blower air passage 16 is formed in the upper part of the blower outlet 5, and a vane 17 for adjusting the blowout air direction is installed in the lower part of the blower outlet 5.
The indoor unit 1 is installed on the ceiling 50 by fixing the anchor bolt 51 suspended from the back of the ceiling 50 to the anchor fixing portion 2 c of the housing 2.

In the indoor unit 1 of the air conditioner configured as described above, after the centrifugal fan 9 rotates, the air passes through the suction port 4 and the bell mouth 13 and is heat-exchanged by the heat exchanger 11, and then the blowout air path The wind direction is adjusted by the vane 17 through 16 and blown out as blown air from the blowout port 5.
Thus, the housing 2 of the indoor unit 1 of the air conditioner of Embodiment 1 includes the top plate portion 2a, the side plate portion 2d, the anchor fixing portion 2c, and the inner wall 2b. Since these are composed of an integrally molded product made of hard synthetic resin, the fixing portion 2c replaces the conventional hanging bracket, so that assembly work becomes unnecessary.
In addition, although the conventional housing is made of steel plate, the housing 2 of this embodiment is composed of an integrally molded product made of hard synthetic resin, so that the weight can be reduced and the indoor unit 1 of the air conditioner can be installed. And the burden on the operator during transportation can be reduced.

Further, since the side surface side of the housing 2 has a double wall structure of the side plate portion 2d and the inner wall 2b disposed inside the side plate portion 2d, a cavity between the side plate portion 2d and the inner wall 2b is formed. Since the air layer in the part 18 serves as a heat insulating material, the temperature of the outer shell of the housing 2 during cooling operation can be suppressed and condensation can be prevented. Therefore, in the conventional air conditioner, the heat insulating material is a top plate portion and a side plate. However, in the first embodiment, as shown in FIG. 1, only the top plate portion 2a is required for the heat insulating member 12 in the first embodiment.
Therefore, there is no need to attach a plurality of sheet-shaped heat insulating materials or plate-shaped heat insulating materials as in the past, and the heat insulating material can be composed of a single sheet of foamed polystyrene, improving transportation efficiency. As a result, the assembly man-hours were reduced and the productivity was improved.

Embodiment 2. FIG.
FIG. 3 is a cross-sectional view showing the overall configuration of the indoor unit of the air conditioner according to Embodiment 2 of the present invention.
The second embodiment improves safety by attaching a sheet metal fall prevention member 19 to the anchor fixing portion 2c so that the housing 2 does not fall in case the anchor fixing portion 2c is damaged. It has been made. The fall prevention member 19 is arranged and fixed so as to straddle the side plate portion 2d and the inner wall 2b and the anchor fixing portion 2c, and prepares for the damage of the anchor fixing portion 2c.

Embodiment 3 FIG.
In Embodiment 3, flame retardant resin (for example, a resin added with a halogen compound or a phosphorus compound having a flame retardant effect) is used to make the housing 2 flame retardant. It is. Therefore, the housing 2 becomes difficult to burn and safety is improved.
Further, a flame retardant paint such as vinyl acetate, a vinyl chloride, an emulsion paint obtained by adding an inorganic pigment to a vinyl chloride, an acrylic pigment, or the like is applied to the surface of the housing 2 integrally molded with resin. It is designed to be flame retardant. Therefore, the housing 2 becomes difficult to burn and safety is improved.

  DESCRIPTION OF SYMBOLS 1 Indoor unit, 2 housing | casing, 2a Top plate part, 2b Inner wall, 2c Anchor fixing part, 2d Side plate part, 3 Decoration panel, 4 Suction inlet, 5 Air outlet, 9 Centrifugal fan, 10 Fan motor, 11 Heat Exchanger, 12 heat insulation member, 13 bell mouth, 14 suction grille, 15 filter, 16 air outlet, 17 vane, 18 cavity, 19 fall prevention member, 50 ceiling, 51 anchor bolt.

Claims (3)

A housing having a top plate portion and a side plate portion, a decorative panel that is mounted from the indoor side to the lower end opening of the housing, has a suction port in the center, and has a plurality of outlets on the outer periphery, and the top plate of the housing In a ceiling-embedded air conditioner indoor unit comprising a centrifugal fan installed in the center of the unit, a fan motor for rotating the centrifugal fan, and a heat exchanger installed so as to surround the outer periphery of the centrifugal fan ,
And the top plate portion, and the side plate portion is disposed inside of the side plate portions, have a, and walls forming a double structure in which an air layer of the cavity between the side plate portions, the hard plastic A housing composed of an integrally molded product, and
An anchor fixing portion provided protruding from the side plate portion;
An air conditioner indoor unit comprising: a sheet metal fall prevention member attached to the anchor fixing portion of the housing . The indoor unit of an air conditioner according to claim 1 , wherein the casing is made of a flame-retardant resin. The indoor unit of an air conditioner according to claim 1 , wherein a flame-retardant paint is applied to the casing.

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