WO2007126072A1

WO2007126072A1 - Indoor unit of air conditioning system

Info

Publication number: WO2007126072A1
Application number: PCT/JP2007/059231
Authority: WO
Inventors: Akihisa Sudo; Masaya Seito; Nobusuke Shirakawa
Original assignee: Toshiba Carrier Corporation
Priority date: 2006-04-28
Filing date: 2007-04-27
Publication date: 2007-11-08
Also published as: CN101484759B; JPWO2007126072A1; JP4582818B2; AU2007244221B2; AU2007244221A1; EP2017544B1; EP2017544A4; CN101484759A; EP2017544A1

Abstract

An electric component box (13), a heat exchanger (7), a drain pan (10) and an air blower (6) are stored in an indoor unit main body (2) having an open lower side. The opened section on the lower side of the indoor unit main body (2) is covered with a decorative panel (3). The drain pan (10) is provided with a first insert fitting (24) for attaching and fixing the drain pan (10) to the indoor unit main body (2), and a second insert fitting (25) for attaching and fixing the electric component box (13) to the drain pan (10). The first insert fitting (24) and the second insert fitting (25) are integrally formed with the drain pan (10) in a status where the fittings are electrically brought into contact with each other.

Description

Specification

Indoor unit of air conditioner

Technical field

TECHNICAL FIELD [0001] The present invention relates to an indoor unit of a ceiling-embedded air conditioner, for example, and more particularly to an improvement of a ground structure for reducing a noise terminal voltage for an electrical component box.

Background art

[0002] An indoor unit of a general ceiling-embedded air conditioner is composed of a sheet metal casing processed from a thin metal plate that is open at substantially the entire lower surface, and a heat insulating material incorporated into the inner surface of the casing. Is done. Inside the indoor unit body, a heat exchanger, a blower, a drain pan, etc. are arranged.

[0003] A cosmetic panel molded with a synthetic resin material and finished beautifully is attached to the lower part of the drain pan. An air outlet and a suction opening are opened in the decorative panel. A louver that determines the direction of the blown air of heat exchange air is attached to the air outlet, and a filter that is supported by an intake grill is fitted into the air inlet.

[0004] Between the drain pan and the decorative panel, an electrical component box that houses electronic components and the like for electrically controlling the indoor unit is disposed. The drain pan is formed of, for example, a polystyrene foam material, and the electric component box is made of a sheet metal obtained by processing a metal thin plate. Therefore, the electrical component box cannot be attached to the drain pan as it is.

[0005] For example, Japanese Patent Application Laid-Open No. 2001-235176 describes one in which insert metal fittings made of sheet metal are embedded and integrally formed when foaming a drain pan. A part of the insert fitting also protrudes the drain pan force, and a screw hole is provided in the protruding portion. In addition, an insert connecting portion is provided in the electrical component box, and a technique is disclosed in which screws are inserted and fixed to these.

Disclosure of the invention

[0006] By the way, the electrical component box is made of a metal material and accommodates electrical components, and therefore measures for reducing the noise terminal voltage are required. Japanese Patent Application Laid-Open No. 2001-235176 does not have a description relating to the reduction of noise terminal voltage. The middle part is interposed between the drain pan and the decorative panel, and the other end is pulled out of the indoor unit and grounded to form the ground wiring for reducing the noise terminal voltage. The assembling work is performed with the indoor unit reversed from the ceiling-mounted state. In other words, the casing, which is the indoor unit main body, is placed on the work table with the upper surface facing downward and the lower surface opening facing upward, and the blower, heat exchanger, drain pan, and electrical component box are sequentially inserted from the opening to the inside. And install the makeup panel.

[0007] In making the ground wiring, an electrical component box is already attached. Therefore, one end of the lead wire must be connected to the electrical component box by inserting a hand through the opening. At this time, it is necessary to avoid the already installed fan, heat exchanger and drain pan, and insert the lead wire and work tool between them, which is extremely troublesome. It is also possible to connect one end of the lead wire to the electrical component box in advance and insert the electrical component box into the case for attachment. However, in this state, the lead wire hangs down from the electrical component box, and there is a risk that it will force the blower or heat exchanger. It is necessary to route the middle part of the lead wire to a predetermined part, and in any case, it is extremely troublesome work.

Accordingly, the present invention provides an indoor unit for an air conditioner that eliminates the need for ground wiring work for reducing the noise terminal voltage during assembly of the indoor unit and can improve the assembly workability. As a goal!

[0009] In order to satisfy the above object, the indoor unit of the air conditioning apparatus of the present invention accommodates an electrical component box, a heat exchanger, a drain pan, and a blower inside an indoor unit body whose bottom surface is open, Close the opening on the bottom surface of the unit body, and install and fix the electrical component box to the drain pan on the first insert fitting and drain pan for mounting and fixing the drain pan to the indoor unit body. A second insert metal fitting is provided, and the first insert metal fitting and the second insert metal fitting are formed integrally with the drain pan in a state of being in electrical contact with each other.

Brief Description of Drawings

FIG. 1 shows a chamber of a ceiling-embedded air conditioner according to an embodiment of the present invention. It is a perspective view of an inner unit.

FIG. 2 is an exploded perspective view of the indoor unit main body according to the embodiment.

FIG. 3 is a longitudinal sectional view of the indoor unit main body according to the embodiment.

FIG. 4 is a plan view of the indoor unit body with the drain pan according to the embodiment attached.

FIG. 5 is a plan view of the main unit of the indoor unit in a state where a bell mouth is further attached according to the same embodiment.

FIG. 6 is a plan view of the indoor unit main body in a state where an electric component box is further attached according to the embodiment.

FIG. 7 is a partial perspective view of the indoor unit main body in a state where the electrical component box according to the embodiment is attached.

FIG. 8 is a partial plan view of the electrical component box according to the embodiment.

FIG. 9 is a partial perspective view of the electrical component box according to the embodiment.

FIG. 10 is a partial perspective view of the bell mouth according to the embodiment during normal use.

FIG. 11 is a partial perspective view of the bell mouth according to the embodiment at the time of slit cutting.

FIG. 12 is a partial perspective view of the bell mouth according to the embodiment when the control electrical component box is attached.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Note that components and components not labeled in the text are not shown. Also, in order to avoid complications in the figure, components and components are intentionally labeled. FIG. 1 is a perspective view showing a lower surface side force of the indoor unit 1 of the ceiling-embedded air conditioner according to the embodiment of the present invention, FIG. 2 is an exploded perspective view of the indoor unit body 2, and FIG. FIG. 4 is a cross-sectional view of the indoor unit body 2.

[0012] The indoor unit 1 of the air conditioner is inserted into a mounting opening provided on the ceiling plate with an indoor side force, and is suspended and fixed to a so-called ceiling behind a suspension bolt or the like. The main unit 2 and the bottom of the indoor unit main unit 2 are exposed to the indoor side from the ceiling panel. The makeup panel 3 is made up of.

The indoor unit body 2 is provided with a sheet metal casing 4 that is open at the entire bottom surface and is formed by adding a thin metal plate to the top surface and the side surface. A heat insulating material 5 molded using a polystyrene foam material or the like is attached to the inner peripheral surface of the casing 4, and the indoor unit main body 2 has a heat insulating structure.

[0013] A blower 6 is disposed in the center of the casing 4 and an indoor heat exchanger 7 integrally formed in a square frame shape in plan view is attached so as to surround the blower 6. In some cases, the indoor heat exchanger 7 includes a pair of heat exchanger portions formed in an L shape in plan view. A drain pump 9 is attached to the corner of the indoor unit body 2.

The lower surface opening of the casing 4 is closed by the decorative panel 3. This decorative panel 3 is molded, for example, from a synthetic resin material and is beautifully finished. The decorative panel 3 is exposed to the room from the ceiling panel, and the gap between the two peripheral surfaces of the indoor unit body and the ceiling panel mounting opening. Shield.

The blower 6 includes a fan motor M that is attached and fixed to the upper surface of the casing 4 by an appropriate means, and a fan F that is attached to the rotating shaft of the fan motor M. The fan F is a multi-blade type fan that blows air in the circumferential direction by sucking air from the direction of the rotation axis as it rotates.

[0015] The indoor heat exchanger 7 is disposed to face the circumferential direction that is the blowing direction of the fan F.

The lower end of the indoor heat exchanger 7 is inserted into a rectangular frame-shaped drain pan 10 provided in the casing 4, and can receive drain water generated by the heat exchange action of the indoor heat exchanger 7. The drain pump 9 is attached so as to be immersed in the drain water in the drain pan 10.

A bell mouth 12 is provided between the decorative panel 3 and the blower fan F, and is surrounded by a drain pan 10. The bell mouth 12 has a horn-shaped converging portion 12a having a small diameter on the blower fan F side and a large diameter on the decorative panel 3 side, a flat portion 12b integrally provided on the large diameter side of the converging portion 12a, and one side of the flat portion 12b. It has a slit portion 12c adjacent to the side.

An electrical component box 13 is attached to the flat portion 12 b of the drain pan 12. This electric The air component box 13 includes a box body 14 that accommodates a control board having an open bottom surface and electrical control components mounted therein, and a lid plate 15 that closes the bottom surface opening of the box body 14 so as to be freely opened and closed. . Both the box 14 and the cover plate 15 are made of sheet metal processed from a thin metal plate.

A fan guard 16 is attached to the converging portion 12a of the bell mouth 12 on the large diameter side. By providing this fan guard 16, safety can be ensured without touching the fan F constituting the blower 6 directly even when the decorative panel 3 is removed during maintenance work. It is.

[0017] The decorative panel 3 includes a panel body 3A having a rectangular outer shape, and a rectangular suction port 17 is opened at the center. The suction port 17 is provided in an area shape substantially opposite to the inner surface of the drain pan 10, and a suction grill 18 for supporting the filter is detachably attached.

The suction grill 18 shields the inside of the casing 4 from the suction port 17 while allowing the indoor air to flow through the suction port 17. During maintenance, the filter can be removed together with the suction grille 18, and the filter and the suction grille 18 can be cleaned on the indoor floor.

An air outlet 19 is provided along each side of the suction port 17. Each air outlet 19 has an extremely elongated shape in the longitudinal direction with respect to the width direction, and is provided at four locations. Each air outlet 19 is provided in the gap between the outer surface of the drain pan 10 and the heat insulating material 5 attached to the inner surface of the casing 4, and is itself bent outward.

A louver R of a louver mechanism is attached to each air outlet 19 and guides heat exchange air to a wide area around the decorative panel 3. Rectangular height adjustment openings 20 are provided at the four corners of the panel body 3A, and a decorative corner panel 21 is detachably attached to the height adjustment openings 20.

[0019] On the other hand, the casing 4 is suspended by four suspension bolts depending on the beam force constituting the ceiling. In other words, the hanging bracket 22A that protrudes outward in the horizontal direction is attached to the corner portion of the side surface of the casing 4, and a suspension bolt is inserted into a long hole d provided in the hanging bracket 22A. The nut is screwed on As a result, the suspension fitting 22A is placed on the upper surface of the nut, and is suspended by suspension bolts at the four force points of the casing. In addition, the height of the casing 4 can be adjusted by adjusting the screwing position of the nut to the hanging bolt. This operation is performed by removing the decorative corner panel 21 and inserting a tool into the height adjustment opening 20.

[0020] The hanging bracket 22A is also provided with a bent piece portion protruding in the horizontal direction at the upper end portion of the bracket body 22 formed in a substantially U-shape. The metal fitting body 22 is attached to the casing 4 by means such as spot welding. Further, the lower end of the metal fitting body 22 also has a piece that is bent in the horizontal direction, and this is referred to as an attachment metal fitting 22B.

Therefore, the mounting bracket 22B is integrally formed with the casing 4 together with the suspension bracket 22A. This mounting bracket 22B is for mounting and fixing the decorative panel 3 and the drain pan 10 to the casing 4, and details of these mounting operations will be described later.

[0021] On the lower surface of the drain pan 10, a part of each of the first insert fitting 24 and the second insert fitting 25 is exposed. That is, a part of the first insert fixture 24 and the second insert fitting 25 is supported in the mold of the drain pan 10 and embedded (inserted) in the drain pan 10 together with foam molding.

The first insert fitting 24 is for attaching and fixing the drain pan 10 to the casing 4. The second insert fitting 25 is for attaching the bell mouth 12 and the electrical component box 13 to the drain pan 10. Details of these mounting operations will be described later.

[0022] In the indoor unit 1 of the ceiling-embedded air conditioner configured as described above, the air blower 6 is driven, so that the air in the air passes through the suction grill 18 and the filter 1 Sucked into 7. Then, it is guided by the bell mouth 12 and sucked in from the rotation axis direction of the blower 6 and blown out in the circumferential direction.

The room air blown in the circumferential direction is circulated through the indoor heat exchanger 7 to exchange heat, and is changed into cold air during cooling operation and into warm air during heating operation. This heat exchange air is guided along the gap between the indoor heat exchanger 7 and the heat insulating material 5 and blown into the room through a plurality of air outlets 19 formed in the decorative panel 3. [0023] Therefore, heat exchange air is uniformly blown out from the indoor unit 1 of the air conditioner attached to the ceiling board to the room, and the air conditioning operation to the room is efficiently performed. Next, the assembly structure of the indoor unit body 2 will be described in detail.

4 is a plan view of the casing 4 with the drain pan 10 attached, FIG. 5 is a plan view of the bell mouth 12 attached, FIG. 6 is a plan view of the electrical component box 13 attached, and FIG. 7 is shown in FIG. FIG. 4 is a partial perspective view of the electrical component box 13 and its peripheral part.

[0024] In the metal fitting body 22, the base end portions of the upper hanging metal fitting 22A and the lower mounting metal fitting 22B are formed to have the same width dimension, and are provided to face each other vertically. The force provided to the suspension fitting 22A is a long hole d for allowing the suspension bolt to pass through. A part of the attachment fitting 22B protrudes so as not to face the long hole d.

The decorative panel 3 is attached to the casing 4 by superimposing the corner portion of the decorative panel 3 on the protruding portion of the mounting bracket 22B and threading and fixing the fixing screws through the screw holes provided to each other. Therefore, the protruding portion of the mounting bracket 22 does not hinder the height adjustment work for the suspension bolt of the suspension bracket 22A.

[0025] The first insert fitting 24 and the second insert fitting 25 are each made of a sheet metal obtained by bending a metal thin plate. As described above, the insert fittings 24 and 25 are inserted when the drain pan 10 is foamed and most of the force is embedded in the drain pan 10. A part of the insert metal is exposed from the drain pan 10 as shown by hatching in FIGS. 4 to 6. .

Only the first insert fitting 24 in the lower right corner shown in FIGS. 4 to 6 is different in shape from the first insert fitting 24 in the other corner. The first insert fittings 24 at the other corners except for the first insert fittings 24 have the same shape and dimensions.

[0026] The second insert fitting 25 is attached only to the upper left and right parts of FIGS. 4 to 6, and does not exist in the upper and lower parts of the right side. FIG. 7 shows an enlarged view of only the side on which the second insert fitting 25 is attached.

In any of the first insert fittings 24, the corner portion force of the drain pan 10 also protrudes outward so that a part of the first insert fitting 24 faces the base ends of the suspension fitting 22A and the mounting fitting 22B. Yes. In a state where the protruding portion of the first insert fitting 24 is aligned with the proximal end portion of the mounting bracket 22B, the screw holes provided to each other communicate with each other.

[0027] The first insert metal fitting 24 provided in the drain pan 10 is attached to the attachment metal fitting 22B at the lower end of the casing 4 by threading and fixing the fixing screw to each screw hole. That is, as shown in FIG. 4, the drain pan 10 is attached and fixed to the casing 4.

The first insert fitting 24 in the lower right corner of FIGS. 4 to 6 includes a pair of rectangular exposed portions g that are separated from the drain pan 10 protruding portion force. The other first insert fixture 24 includes a horizontally long exposed portion h in parallel with the protruding portion of the drain pan 10. These exposed portions g and h are provided with holes, which are engaging holes for engaging with the pins that hold the first insert fitting 24 when the drain pan 10 is foam-molded.

The first left and right first insert fittings 24 shown in FIGS. 4 to 6 have a circular exposed portion i adjacent to the horizontally long exposed portion h. The exposed portion i is provided with a fixing screw 26 as shown in FIG. The fixing screw 26 fixes the protrusions provided on the first insert fitting 24 and the second insert fitting 25.

That is, a part of each of the first insert fitting 24 and the second insert fitting 25 protrudes inside the drain pan 10, overlaps each other, and is in close contact with each other. These protruding portions are provided with screw holes communicating with each other, and the fixing screw 26 is inserted and screwed into the screw holes. Therefore, the insert fittings 24, 25- are firmly fixed to each other. The second insert fitting 25 on the upper side shown in FIGS. 4 to 6 and on the right side shown in FIG. 7 is attached at a different angle from the attachment direction of the first insert fitting 24. Further, the second insert fitting 25 on the lower side shown in FIGS. 4 to 6 and on the left side shown in FIG. 7 is attached along the attachment direction of the first insert fitting 24.

[0029] As described above, the two second insert fittings 25 used here are formed in exactly the same size and shape, although their mounting postures with respect to the first insert fitting 24 are different from each other. The exposed portion of the second insert fitting 25 is provided with a plurality of screw holes and a holding hole at the time of insert processing.

As shown in Fig. 5, the bell on the part where the second insert fitting 25 of the drain pan 10 is exposed. When the flat portion 12b of the mouse 12 is combined, the screw hole provided in the bell mouth flat portion 12b communicates with the screw hole of the second insert fitting 25. The bell mouth 12 can be fixedly attached to the drain pan 10 by inserting fixing screws through these screw holes.

In this state, the bell mouth 12 is provided with a through-hole portion 27 that is opposed to the screw hole provided in the second insert fitting 25 and is larger than the diameter of the screw hole. As shown in FIGS. 6 and 7, when the box body 14 of the electrical component box 13 is aligned with the bell mouth flat part 12b, the through hole part 27 faces the screw hole k provided in the box body 14.

Therefore, a fixing screw is passed through and screwed from the screw hole k of the box body 14 into the screw hole of the second insert fitting 25 through the through hole portion 27 of the bell mouth 12. As a result, the box body 14 can be attached to the drain pan 10 via the bell mouth 12. The screw hole k is formed by drawing the bottom portion of the box body 14 in a stepped manner so as to increase the strength of the bottom portion of the box body 14.

[0031] In the vicinity of the screw hole k of the box body 14, an escape protrusion m that protrudes upward is provided. These escape protrusions m are in a position facing the head of the fixing screw that attaches the bell mouse 12 to the second insert fitting 25 in a state of being in close contact with the bell mouth 12 so that the box 14 can be attached. That is, it is a so-called escape for the screw head.

The electrical component box 13 is assembled by housing the control board in the box 14 and attaching the cover plate 15. Thereafter, the indoor unit 2 is formed by attaching the fan guard 16 and attaching the decorative panel 3 to the indoor unit body 2 as described above. This indoor unit 2 can be installed at the installation site and suspended by hanging bolts.

[0032] As described above, the sheet metal electrical component box 13 is attached to the sheet metal second insert metal fitting 25 using the fixing screw, so that they are electrically connected to each other. The first insert fitting 24 and the second insert fitting 25, which are made of sheet metal, are inserted into the drain pan 10, and the protrusions of each other are in contact with each other and are electrically conductive.

Further, the protruding portions of the first insert metal fitting 24 and the second insert metal fitting 25 are closely fixed by a fixing screw 26. Accordingly, the insert fittings 24 and 25 are inserted into the drain pan 10, but are more reliably electrically connected to each other by the fixing screw 26.

[0034] The first insert bracket 24 and the sheet metal mounting bracket 22B are fixed to each other via a fixing screw. And are in electrical conduction with each other. The mounting bracket 22B is formed in the lower part of the metal plate body 22 made of sheet metal, and the suspension bracket 22A is formed on the upper part. Therefore, the mounting bracket 22B and the suspension bracket 22A are in an electrically conductive state.

The metal fitting body 22 provided with the hanging metal fittings 22A and the attachment metal fittings 22B is attached and fixed to the sheet metal casing 4 and is electrically conductive as a whole. The suspension fittings 22A are suspended by metal suspension bolts and are electrically connected to each other. The hanging bolt is provided on a beam or the like constituting the ceiling and is in a grounded state.

[0036] Because of this, by assembling the indoor unit body 2 and attaching the decorative panel 3, the indoor unit 1 is completed as a product, and it is necessary to carry it into the site and suspend it on the suspension bolt. Naturally, a ground path is formed from the electrical component box 13 to the ground via the first and second insert fittings 25, 25, the casing 4, the suspension bolts, and the like.

[0037] Therefore, by adopting the configuration as in the present embodiment, the lead wire for forming the ground wiring for reducing the noise terminal voltage as in the conventional case becomes unnecessary, and the component cost can be reduced. In addition, the work of connecting the lead wires to the electrical component box can be omitted, so that the workability can be improved and the cost can be reduced.

[0038] Since the first insert fitting 24 and the second insert fitting 25 are not integrated but separated, the mounting position can be varied according to the design specifications for the drain pan 10. That is, if a plurality of first insert fittings 24 and second insert fittings 25 are prepared, the present invention can be applied to drain pans having other shapes and structures.

[0039] Next, the box body 14 constituting the electrical component box 13 will be described in detail.

FIG. 8 is a plan view of a part of the box body 14 with the electrical components housed therein omitted, and FIG. 9 is a perspective view showing the electrical components housed inside the box body 14 at the same site.

[0041] The electrical component box 13 has a rectangular shape that is longer in the longitudinal direction than in the width direction. A terminal block base 28 is attached to the bottom of one side of the box body 14. In other words, the terminal block base 28 is mounted in an inclined state from the bottom of the box body 14 to the side edge, and has a double structure with a gap between the bottom of the box body 14 and the terminal block base 28. Yes.

In particular, as shown in FIG. 9, a plurality of terminal blocks 29, a cord fixing tool 30 and the like are mounted on the terminal block base 28, and ground marks 31 are attached to positions between these mounting parts. . Further, a screw insertion hole 32 having a burring hole force is provided in the vicinity of the ground mark 31, and the screw hole k is provided at the bottom of the box body 14 facing this.

A notch 33 is provided at the corner of the box 14 and the mounting position force of the terminal block base 28 extends to the bottom of the box 14. When the box 14 is mounted, if a screw is accidentally dropped when inserting the fixing screw into the screw insertion hole 32 of the terminal block base 28, the screw j may be taken out from the notch 33.

[0044] After the indoor unit body 2 is suspended by the suspension bolts and the necessary height position adjustment work is completed, the suction grill 18 and the filter are removed to expose the electrical component box 13. Further, the cover plate 15 of the electric parts box 13 is removed, and the electric parts and the terminal block 29 etc. accommodated in the box body 14 are exposed.

[0045] At least a power or signal lead wire terminal is attached to the terminal block 29, and the lead wire is electrically connected to the control electrical component. These operations are carried out with the electrical component box 13 looking up, but the terminal block base 28 is mounted obliquely with respect to the bottom of the box body 14 and the workability is improved. Is obtained.

[0046] Next, the bell mouth 12 will be described.

FIGS. 10 to 12 are perspective views of the bell mouth 12-portion during normal use, when the slit portion is cut, and when the control electrical component box is attached, respectively.

[0048] As shown in Fig. 10, the bell mouth 12 is provided with the slit portion 12c having a rectangular cut. If a certain amount of force or force is applied to the slit portion 12c, the force that breaks the bell mouth 12- portion will not break during normal use, and will remain as it is. Therefore, ensure the air volume when used as Bellmouth 12.

[0049] For example, in the case of an optional specification such as increasing the number of indoor units with respect to the outdoor unit, it is necessary to additionally install a control electrical component box 40 provided with a control board. At this time, as shown in FIG. 11, a certain amount of strong force is applied to the slit portion 12c, and the end portion side portion is removed from the slit portion 12c (when the slit portion is cut).

[0050] In this state, a plurality of ribs 35 provided in parallel are exposed at a certain interval on the extension of the flat portion 12b. The tips of these ribs 35 have a narrow gap with the flat part 12b plate surface. By inserting the lead wire 36 into this gap, the lead wire 36 is pressed down by the rib 35. Can be removed.

Then, as shown in FIG. 12, an electrical component box 40 for control stored as an option is prepared, and this is opposed to the rib 35, and the slit portion 12 c after being cut is formed. Fit. Furthermore, the control branch component box 40 is screwed and fixed to the bell mouth 12 using a fixing screw (when the control electric component box is attached).

That is, it is possible to attach the optional control electrical component box 40 without increasing the number of components by a simple operation simply by cutting the slit portion 12c. The rib 35 has a base for the control electrical component box 40 and a guide for the lead wire 36, and can easily meet the optional specifications.

It should be noted that 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 spirit of the invention at the stage of implementation. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

Industrial applicability

[0053] According to the present invention, the wiring work for grounding for reducing the noise terminal voltage at the time of assembling the indoor unit is unnecessary, and the assembling workability can be improved.

Claims

The scope of the claims

[1] An indoor unit main body having an open bottom surface and containing an electrical component box, a heat exchanger, a drain pan, and a blower inside,

A decorative panel that closes the opening on the lower surface of the indoor unit body;

A first insert fitting provided on the drain pan for attaching and fixing the drain pan to the indoor unit body; and a second insert fitting for attaching and fixing the electric component box to the drain pan. Equipped,

The indoor unit of an air conditioner, wherein the first insert fitting and the second insert fitting are electrically connected to each other and are formed integrally with the drain pan.

[2] The air conditioner according to claim 1, wherein a part of each of the first insert fitting and the second insert fitting is overlapped, and the overlapping portion is fixed with a fixing screw. Indoor unit.

[3] The indoor unit for an air conditioner according to any one of claims 1 and 2, wherein a bell mouth is attached and fixed to the second insert fitting.