CN101484759B - Indoor unit of air conditioning system - Google Patents

Abstract

An indoor unit body (2) of an air conditioning apparatus having an openable lower surface contains an electrical parts box (13), a heat exchanger (7), a drain pan (10), and an air blower (3) inside. A dress panel (3) closes the opening section of the lower surface of the indoor unit body (2). The drain pan (10) has first insert metal parts (24) for fixing the drain pan (10) to the indoor unit body (2) and second insert metal parts (25) for attaching and fixing the electrical parts box (13) to the drain pan (10). The first insert metal parts (24) and the second insert metal parts (25) are electrically connected and integrally formed with the drain pan (10).

Description

Indoor unit of air conditioning unit

technical field

The present invention relates to an indoor unit such as a ceiling-embedded air conditioner, and particularly to an improvement of a grounding structure for an electrical component box for reducing noise terminal voltage.

Background technique

In the indoor unit of a general ceiling-mounted air conditioner, the main body of the indoor unit is composed of a shell made of sheet metal whose lower portion is substantially open on the entire surface, and a heat insulator attached to the inner surface of the shell. processing to form. Inside the main body of the indoor unit, a heat exchanger, a blower, a drain pan, and the like are provided.

A decorative panel formed by synthetic resin material and beautified and finished is installed on the lower part of the drain pan, and an air outlet and a suction port are arranged on the above-mentioned decorative panel. A louver to limit the blowing direction of the heat exchange air is attached to the air outlet, and a filter supported by a suction grill is embedded in the air inlet.

An electrical component box accommodating electronic components and the like for electrically controlling the indoor unit is provided between the drain pan and the decorative panel. The drain pan is formed of, for example, a foamed styrene material, and the electrical component box is a sheet metal product obtained by processing a thin metal plate. Therefore, the electrical component box cannot be installed directly on the drain pan.

For example, JP-A-2001-235176 describes a technique of embedding sheet metal insert fittings and forming them integrally during foam molding of a drain pan. A part of the insertion fitting protrudes from the drain pan, and a threaded hole is provided in the protruding portion. In addition, the technique of providing an insertion connection part in an electrical component box, and inserting a screw into these components and fixing them is also disclosed.

However, since the above-mentioned electrical component box is made of metal and accommodates electrical components, it is necessary to take countermeasures to reduce the noise terminal voltage. In Japanese Patent Laid-Open No. 2001-235176, there is no record about the reduction of the noise terminal voltage. Generally, one end of the wire is connected to the electrical component box, and the middle part is located between the drain pan and the decorative panel. The other end is led out of the indoor unit and grounded to form a grounding wiring for reducing noise terminal voltage.

In addition, the assembling work of the indoor unit is carried out by placing the indoor unit in a state opposite to that mounted on the ceiling. That is, put the casing as the main body of the indoor unit on the workbench with the upper surface down and the lower opening on the upper side, insert and install the air blower, heat exchanger, drain pan, and electrical component box from the opening to the inside in sequence, Finally, install the trim panels.

Since the electrical component box is already installed when the above-mentioned ground wiring is formed, it is necessary to insert a hand through the opening to connect one end of the lead wire to the electrical component box. At this time, it is necessary to avoid the installed air blower, heat exchanger, and drain pan, and it is extremely troublesome to insert wires and work tools between them for operation.

Alternatively, one end of the wire may be connected to the electrical component box in advance, and then the electrical component box may be inserted into the housing. However, in this state, there is a concern that the lead wires hang down from the electrical component box and become entangled with the air blower, the heat exchanger, etc., and thus it takes effort. It is necessary to lead and wind the midway portion of the wire at a predetermined position, and any of these is an extremely troublesome operation.

Contents of the invention

Therefore, an object of the present invention is to provide an indoor unit of an air conditioner, which eliminates the need for grounding wiring work for reducing the noise terminal voltage when the indoor unit is assembled, and improves assembly workability.

In order to achieve the above object, the indoor unit of the ceiling embedded air conditioner of the present invention accommodates an electrical component box, a heat exchanger, a drain pan, and a blower inside the indoor unit main body that is open below, and covers the underside of the indoor unit main body through a decorative panel. The opening part of the drain pan is provided with a first insertion fitting for installing and fixing the drain pan relative to the main body of the indoor unit and a second insertion fitting for installing and fixing the electrical component box relative to the drain pan. The fitting and the second plug-in fitting are integrally formed on the drain pan in electrical contact with each other.

Description of drawings

FIG. 1 is a perspective view of an indoor unit of a ceiling-mounted air conditioner according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the indoor unit main body of the embodiment.

Fig. 3 is a longitudinal sectional view of the indoor unit main body of this embodiment.

Fig. 4 is a plan view of the indoor unit main body in the state where the drain pan is attached according to the embodiment.

Fig. 5 is a plan view of the indoor unit main body in the state where the bell mouth is further installed in this embodiment.

Fig. 6 is a plan view of the indoor unit main body in a state in which 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 the state where the electrical component box is attached according to the embodiment.

Fig. 8 is a partial plan view of the electrical component box of this embodiment.

Fig. 9 is a partial perspective view of the electrical component box of the embodiment.

Fig. 10 is a partial perspective view of the horn mouth in this embodiment when it is in normal use.

Fig. 11 is a partial perspective view of the bell mouth in this embodiment when the slit portion is cut off.

Fig. 12 is a partial perspective view of the bell mouth control electrical component box of the embodiment when it is installed.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings. (Constituent members and structural parts that are not given reference numerals in the text description are not shown. In addition, in order to avoid the complexity of the drawings, there are cases where the structural members and structural parts are not given signs.)

1 is a perspective view showing an indoor unit 1 of a ceiling-mounted air conditioner according to an embodiment of the present invention from below. FIG. 2 is an exploded perspective view of an indoor unit body 2. FIG.

An indoor unit 1 of an air conditioner includes: an indoor unit main body 2 inserted into an installation opening provided on a ceiling plate from the indoor side, and hung and fixed on a so-called backside of the ceiling via suspension bolts or the like; and a decorative panel 3 installed in the indoor The lower part of the unit main body 2 is exposed to the indoor side from the ceiling board.

The indoor unit main body 2 has an entire lower surface open, and has a casing 4 made of a sheet metal formed by processing a thin metal plate on the upper surface and side surfaces. A heat insulator 5 formed of foamed styrene material or the like is attached to the inner peripheral surface of the housing 4, whereby the indoor unit main body 2 forms a heat insulating structure.

A blower 6 is disposed at the center of the inside of the housing 4, and an integrally formed indoor heat exchanger 7 having a square frame shape in plan view is attached to surround the blower 6. As shown in FIG. As the indoor heat exchanger 7, a heat exchanger including a pair of heat exchanger parts formed in an "L" shape in plan view may be used. A drain pump 9 is attached to a corner of the indoor unit main body 2 .

The lower surface opening of the housing 4 is covered by the decorative panel 3 . The decorative panel 3 may be molded of synthetic resin material and beautified and finished, and is exposed to the room from the ceiling to cover the gap between the peripheral surface of the indoor unit main body 2 and the installation opening of the ceiling.

The above-mentioned air blower 6 includes a fan motor M mounted and fixed on the upper surface of the housing 4 in an appropriate manner, and a fan F mounted on the rotation shaft of the fan motor M. As shown in FIG. The above-mentioned fan F is a multi-blade fan that takes in air from the direction of the rotation axis and blows it out in the circumferential direction as it rotates.

The said indoor heat exchanger 7 is arrange|positioned so that it may oppose the blowing direction of the fan F (namely, the circumferential direction). The lower end of the indoor heat exchanger 7 is inserted into the square frame-shaped drain pan 10 provided in the casing 4 to receive the condensed water generated when the indoor heat exchanger 7 performs heat exchange. The above-mentioned drain pump 9 is installed so as to be immersed in the condensed water in the drain pan 10 .

Between the decoration panel 3 and the blower fan F, a bell mouth 12 is set, and its periphery is surrounded by a drain pan 10 . The bell mouth 12 is provided with: a horn-shaped converging portion 12a with 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 an adjacent flat portion 12b on the side of the flat portion 12b. The slit portion 12c is provided.

An electrical component box 13 is attached to the flat portion 12 b of the bell mouth 12 . The electrical component box 13 includes a box body 14 having an open bottom and accommodating a control board containing electrical components for control therein, and a cover plate 15 that covers the bottom opening of the box body 14 so as to be openable and closable. Both the box body 14 and the cover plate 15 are sheet metal products obtained by processing thin metal plates.

A fan guard 16 is attached to the large diameter side of the converging portion 12 a of the bell mouth 12 . By providing the fan guard 16 , even when the decorative panel 3 is removed for maintenance, the hand does not directly touch the fan F constituting the blower 6 , thereby ensuring safety.

The above-mentioned decorative panel 3 includes a panel main body 3A having a rectangular outer shape, and a rectangular suction port 17 is opened in the center. The suction port 17 is provided in an area shape substantially facing the inner surface of the drain pan 10, and a suction grill 18 supporting a filter is detachably attached.

The above-mentioned suction grille 18 can keep the indoor air at the suction port 17 circulating, and at the same time can cover the inside of the casing 4 from the suction port 17 . During maintenance, the suction grill 18 and the filter can be disassembled at the same time, so that the filter and the suction grill 18 can be cleaned on the indoor floor.

The air outlet 19 is arranged along each edge of the above-mentioned suction port 17 . With respect to the width direction, each air outlet 19 is formed in a very elongated shape in the length direction and provided at four positions. Each air outlet 19 faces the gap setting between the heat insulator 5 installed on the outer surface of the drain pan 10 and the inner surface of the housing 4, and is formed by bending outwards itself.

The louvers R of the louver mechanism are installed on each air outlet 19 to guide the heat exchange air to blow out to a large area around the decorative panel 3 . Rectangular height-adjusting openings 20 are respectively provided at four corners of the panel main body 3A, and decorative gussets 21 are detachably attached to these height-adjusting openings 20 .

On the other hand, the housing 4 is suspended by four suspension bolts suspended from beams constituting the rear surface of the ceiling. Specifically, a hanger 22A protruding outward in the horizontal direction is installed on the corner of the side surface of the housing 4, the hanger bolt is inserted through the deep hole d provided on the hanger 22A, and the nut is screwed into the inserted hole d. part of the underside.

In this way, the hanger 22A is placed on the nut, and the housing 4 is suspended by the suspension bolts at four positions. In addition, the suspension height of the casing 4 can be adjusted by adjusting the threaded position of the nut relative to the suspension bolt. This work is performed by removing the decorative gusset 21 and inserting a tool into the height adjustment opening 20 .

The hanger 22A is constituted by a curved piece protruding in the horizontal direction on the upper end portion of the attachment body 22 formed in a substantially U-shape. The accessory body 22 is mounted on the housing 4 by spot welding or the like. Moreover, the lower end part of the fitting main body 22 also has the piece part bent in the horizontal direction, and this is called the fitting 22B for attachment.

Therefore, the attachment fitting 22B is formed integrally with the housing 4 together with the hanger 22A. The installation fitting 22B is used to install and fix the above-mentioned decorative panel 3 and the above-mentioned drain pan 10 on the casing 4 , and their installation operations will be described in detail later.

A part of each of the first insertion fitting 24 and the second insertion fitting 25 is exposed under the drain pan 10 . That is, a part of the first insert fitting 24 and the second insert fitting 25 are supported in the molding die of the drain pan 10 and embedded (inserted) in the drain pan 10 at the same time as foam molding.

The above-mentioned first insertion fitting 24 is used to install and fix the drain pan 10 in the housing 4 . The above-mentioned second insertion fitting 25 is used to install the bell mouth 12 and the electrical component box 13 in the drain pan 10 . Their installation work will be described in detail later.

In the indoor unit 1 of the ceiling-mounted air conditioner having such a structure, by driving the blower 6 , indoor air is sucked into the suction port 17 through the suction grill 18 and the filter. Thereafter, it is guided by the bell mouth 12, sucked in from the direction of the rotation axis of the air blower 6, and blows out in the circumferential direction.

The indoor air blown out in the circumferential direction circulates in the indoor heat exchanger 7 for heat exchange, becomes cold air during the cooling operation, and becomes warm air during the heating operation. The heat-exchanged air is guided along the gap between the indoor heat exchanger 7 and the heat insulator 5 and blown into the room through a plurality of air outlets 19 formed on the decorative panel 3 .

Therefore, heat-exchanged air is uniformly blown into the room from the air-conditioning indoor unit 1 of the air-conditioning apparatus mounted on the ceiling plate, and the air-conditioning effect on the room can be effectively exhibited.

Next, the assembly structure of the indoor unit main body 2 will be described in detail.

Fig. 4 is the plan view of the state that drain pan 10 is installed on the housing 4, and Fig. 5 is the plan view that further installs bell mouth 12, and Fig. 6 is the plan view that further installs electrical components box 13, and Fig. 7 is the plan view shown in Fig. 6 A partial perspective view of the electrical component box 13 and its periphery.

In the attachment main body 22 described above, the respective base ends of the upper hanger 22A and the lower attachment attachment 22B are formed to have the same width dimension and are provided to face each other up and down. The hanger 22A is provided with a deep hole d for insertion of a suspension bolt, and a part of the fitting 22B for attachment protrudes so as not to face the deep hole d.

The panel main body 3 is attached to the case 4 by overlapping the corners of the decorative panel 3 with the protruding portions of the attachment fitting 22B, and inserting and tightening fixing screws into the mutually provided screw holes. Therefore, the protruding portion of the mounting bracket 22 does not become an obstacle to the height adjustment operation of the hanger 22A with respect to the suspension bolt.

The first insertion fitting 24 and the second insertion fitting 25 are sheet metal products obtained by bending a thin metal plate. As mentioned above, during the foam molding of the drain pan 10, the insert fittings 24, 25 are inserted and most of them are embedded in the drain pan 10, and a part is shown by hatching in FIGS. 4-6 . Exposed from the drain pan 10.

Only the first insertion fitting 24 in the lower right corner shown in FIGS. 4 to 6 differs in shape and size from the first insertion fittings 24 in other corners. Except for the first insertion fitting 24, the shapes and sizes of the first insertion fittings 24 at other corners are the same as each other.

The second insertion fitting 25 is attached only to the left upper and lower parts shown in FIGS. 4 to 6 , and does not exist on the right upper and lower parts. FIG. 7 only shows an enlarged view of the side on which the second plug-in fitting 25 is mounted.

Optional first insertion fittings 24 also protrude outward from the corners of the drain pan 10 so as to partially face the base end portions of the hanger 22A and the attachment fitting 22B. In a state where the protruding portion of the first insertion fitting 24 corresponds to the base end portion of the attachment fitting 22B, the screw holes provided with each other communicate.

The first insertion fitting 24 provided on the drain pan 10 is attached to the attachment fitting 22B at the lower end of the housing 4 by inserting and tightening the fixing screws into the respective threaded holes. That is, as shown in FIG. 4 , the drain pan 10 is installed and fixed on the casing 4 .

The first insertion fitting 24 at the lower right corner of FIGS. 4 to 6 is provided with a pair of rectangular exposed portions g separated from the protruding portion of the drain pan 10 . The other first plug-in fitting 24 is provided with a rectangular exposed portion h parallel to the protruding portion of the drain pan 10 . These exposed portions g, h are provided with holes for engaging with pins holding the first insert fitting 24 during foam molding of the drain pan 10 .

The first insertion fitting 24 on the upper and lower left sides shown in FIGS. 4 to 6 has a circular exposed portion i adjacent to the rectangular exposed portion h. As shown in FIG. 7 , fixing screws 26 are provided on the exposed portion i. The fixing screws 26 are used to fix the protrusions provided on the first insertion fitting 24 and the second insertion fitting 25 to each other.

That is, in the inside of the drain pan 10 , a part of each of the first insertion fitting 24 and the second insertion fitting 25 protrudes, overlaps each other, and is in close contact with each other. Screw holes communicating with each other are provided on these protruding parts, and the above-mentioned fixing screws 26 are inserted and screwed there. Therefore, a part of each insertion fitting 24, 25 can be firmly fixed mutually.

The second insertion fitting 25 is mounted on the upper side shown in FIGS. 4 to 6 and on the right side shown in FIG. 7 so as to change the angle with respect to the installation direction of the first insertion fitting 24 . In addition, the second insertion fitting 25 is installed on the lower side shown in FIGS. 4 to 6 and on the left side shown in FIG. 7 along the installation direction of the first insertion fitting 24 .

In this way, the two second insertion fittings 25 used here are formed with the same size and shape although their installation postures relative to the first insertion fitting 24 are different from each other. Moreover, the exposed part of the 2nd insertion metal fitting 25 is provided with the several screw hole and the hole for holding|maintenance at the time of insertion processing.

As shown in Figure 5, if the flat part 12b of the bell mouth 12 is made to correspond to the exposed part of the second insertion fitting 25 of the drain pan 10, the threaded hole provided on the flat part 12b of the bell mouth and the second insertion fitting 25 will correspond to each other. The threaded holes are connected. The bell mouth 12 can be installed and fixed on the drain pan 10 by inserting and screwing fixing screws into these threaded holes.

In this state, the bell mouth 12 is provided with a through-hole portion 27 that faces the screw hole provided in the second insertion fitting 25 and is larger in diameter than the screw hole. As shown in Figures 6 and 7, if the casing 14 of the electrical component box 13 is corresponding to the position of the flat part 12b of the bell mouth, the above-mentioned through-hole portion 27 is opposite to the threaded hole k provided on the casing 14.

Therefore, from the threaded hole k of the box body 14 , through the through-hole portion 27 of the bell mouth 12 , the fixing screw is inserted and screwed into the threaded hole of the second insertion fitting 25 . Thereby, the case body 14 can be attached to the drain pan 10 via the bell mouth 12 . In addition, the threaded hole k is formed by shrinking the bottom of the box body 14 into a stepped shape, so that the strength of the bottom of the box body 14 can be increased.

In the vicinity of the threaded hole k of the case 14, an escape protrusion m protruding upward is provided. These escaping protrusions m are at positions facing the heads of fixing screws for attaching the bell mouth 12 to the second insertion fitting 25 in a state of being in close contact with the bell mouth 12 for mounting the case 14 . That is, it can play the role of what is called a screw head avoidance.

The electrical component box 13 is assembled by accommodating a control substrate in the box body 14 and attaching the cover plate 15 . Subsequently, the fan guard 16 is installed, and the decorative panel 3 is installed on the indoor unit main body 2 as described above, thereby forming the indoor unit 2 . The indoor unit 2 can be moved into the assembly site and hung by hanging bolts.

As described above, since the electric component box 13 made of sheet metal is attached to the second insert fitting 25 made of sheet metal with fixing screws, they are in a state of being electrically connected to each other. The first insertion fitting 27 and the second insertion fitting 25 , both of which are made of sheet metal, are inserted into the drain pan 10 , and their protrusions are in contact with each other to be in electrical conduction.

In addition, the protrusions of the first insertion fitting 24 and the second insertion fitting 25 are closely fixed to each other by fixing screws 26 . Therefore, each insertion fitting 24 , 25 is inserted into the drain pan 10 , and is in a more reliable electrical conduction state with each other through the fixing screw 26 .

The first insertion metal fitting 24 and the sheet metal mounting metal fitting 22B are mounted and fixed via fixing screws and are electrically connected to each other. Since the attachment fitting 22B is formed on the lower portion of the fitting body 22 made of sheet metal, and the hanger 22A is formed on the upper portion thereof, the attachment fitting 22B and the hanger 22A are electrically connected.

The attachment main body 22 including these hanger 22A and attachment attachment 22B is attached and fixed to the sheet metal case 4, and the whole is in a state of electrical conduction. The hanger 22A is hung by a metal hanger bolt and is electrically connected to each other. The above-mentioned suspension bolts are installed on beams or the like constituting the ceiling panel and are in a grounded state.

Therefore, by assembling the indoor unit main body 2 and installing the decorative panel 3, the indoor unit 1 is completed as a product. If it is carried into the site and hung on the suspension bolts, it must be formed from the electrical parts box 13 via the first and second insertions. Grounding path for accessories 24, 25, housing 4 and suspension bolts etc. to be grounded.

Therefore, by adopting a structure such as this embodiment, there is no need for a lead wire for forming a grounding wiring for reducing the noise terminal voltage in the past, so that the component cost can be reduced, and the work of connecting the lead wire to the electrical component box can be omitted, thereby It is possible to improve operability and contribute to cost reduction.

In addition, since the first insertion fitting 24 and the second insertion fitting 25 are not integrally formed but are formed separately, the mounting position can be changed according to the design of the drain pan 10 . That is, if a plurality of first insertion fittings 24 and second insertion fittings 25 are prepared, it can also be applied to drain pans of other shapes and structures.

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

8 is a plan view of a part of the housing 14 omitting the electrical components accommodated therein, and FIG. 9 is a perspective view showing electronic components accommodated therein at the same portion of the housing 14 .

The electrical component box 13 is formed in a rectangle whose longitudinal direction is longer than the width direction. A terminal board base 28 is installed at the bottom of one side of the box body 14 . Specifically, the terminal board base 28 is installed obliquely from the bottom of the box body 14 to the side end, and there is a gap between the bottom of the box body 14 and the terminal board base 28 to form a double-layer structure.

In particular, as shown in FIG. 9 , a plurality of terminal boards 29 and cable fixing tools 30 are mounted on the terminal board base 28 , and ground marks 31 are added to positions between these mounting members. In addition, a screw insertion hole 32 constituted by a burring is provided near the grounding mark 31, and the above-mentioned threaded hole k is provided at the bottom of the case 14 facing it.

Cutouts 33 are provided at the corners of the above-mentioned case 14 and from the mounting position of the terminal board base 28 to the bottom of the case 14 . When installing the case 14 , if the fixing screw is inserted into the screw insertion hole 32 of the terminal board base 28 and the screw falls off accidentally, the screw j can be taken out from the notch 33 .

After the indoor unit main body 2 is hung on the suspension bolts, the necessary height position adjustment work is completed, and the suction grille 18 and the filter are removed to expose the electrical component box 13 . Furthermore, the cover plate 15 of the electrical component box 13 is removed, and the electrical components accommodated in the box body 14, the terminal board 29, etc. are exposed.

At least, the above-mentioned terminal board 29 is equipped with electric power or signal wire terminals, and the work of electrically connecting the wires to the control electrical components is performed. Although these operations are performed with the electric component box 13 looking up, by attaching the terminal board base 28 obliquely to the bottom of the box body 14, the operations can be easily performed and workability can be improved.

Next, the bell mouth 12 will be described.

10 to 12 are partial perspective views of the bell mouth 12 during normal use, when the slit is disconnected, and when the electrical component box for control is installed.

As shown in FIG. 10, the above-mentioned slit portion 12c having a rectangular cutting depth is provided in the above-mentioned bell mouth 12. As shown in FIG. If a certain amount of strong force is applied to the slit portion 12c, a part of the bell mouth 12 will break, but it will not break and remain as it is normally. Therefore, the bell mouth 12 can ensure the air volume during use.

For example, when an option specification such as increasing the number of indoor units to the outdoor unit is selected, it is necessary to additionally install the control electrical component box 40 including the control board. At this time, as shown in FIG. 11 , a certain amount of strong force is applied to the slit portion 12 c to remove the end portion side from the slit portion 12 c (when the slit portion is broken).

In this state, a plurality of ribs 35 arranged in parallel at certain intervals on the extension line of the flat portion 12b are exposed. There is a narrow gap between the front end portion of these ribs 35 and the plate surface of the flat portion 12b, and by inserting the conductive wire 36 into this gap, the conductive wire 36 can be pressed in through the rib 35.

As shown in FIG. 12 , a control electrical component box 40 stored as an option is prepared, and is fitted into the cut slit portion 12 c while facing the upper side of the rib 35 . Furthermore, the control branch electrical component box 40 is fixed to the bell mouth 12 by bolting using the fixing screws (when the control electrical component box is installed).

That is, the optional control electrical component box 40 can be mounted by simply cutting the slit portion 12c without increasing the number of components. The rib 35 is provided with a base for the control component box 40 and a guide portion for the lead wire 36, and can easily cope with an optional specification.

In addition, the present invention is not limited to the above-described embodiments, and the constituent elements can be modified and realized in the implementation stage within a range not departing from the gist thereof. Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-mentioned embodiments.

Industrial Applicability

According to the present invention, it becomes unnecessary to carry out the grounding wiring work for reducing the noise terminal voltage at the time of assembling the indoor unit, and it is possible to improve the assembling workability.

Claims (3)

1. the indoor unit of a ceiling-embedded air conditioner is characterized in that, possesses:

The indoor unit main body, lower aperture, and accommodate electric part box, heat exchanger, drain pan and pressure fan in inside;

Decoration panel covers the peristome below this indoor unit main body;

First inserts accessory, is arranged on the above-mentioned drain pan, is used for installing and fixing above-mentioned drain pan with respect to above-mentioned indoor unit main body; And

Second inserts accessory, is used for installing and fixing above-mentioned electric part box with respect to above-mentioned drain pan;

The above-mentioned first insertion accessory and above-mentioned second inserts accessory and is electrically connected to each other, and integrally formed with above-mentioned drain pan.

2. the indoor unit of ceiling-embedded air conditioner according to claim 1 is characterized in that,

Above-mentioned first inserts accessory and above-mentioned second inserts accessory part coincidence separately, and this coincidence position is fixed by hold-down screw.

3. the indoor unit of ceiling-embedded air conditioner according to claim 1 and 2 is characterized in that,

On the above-mentioned second insertion accessory, be mounted with horn mouth.

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