JP4122396B2 - Air conditioner indoor unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an indoor unit of a ceiling-embedded air conditioner, and relates to a take-out portion structure provided in an outdoor unit main body in order to take out at least piping connected to a heat exchanger from the indoor unit main body to the outside.
[0002]
[Prior art]
When air-conditioning a large space such as a store as an air conditioner indoor unit, it is not the so-called wall-mounted type that is attached to the wall surface, but it can blow air-conditioned air in multiple directions and the pressure received by the residents There is a tendency to use indoor units with a built-in ceiling with little feeling.
In this type of indoor unit, the indoor unit body is composed of a metal plate housing that is integrated by fitting the top plate portion into the side plate portion, and a heat insulating material that is incorporated into the inner surface of the metal plate housing. It is fitted into the ceiling plate opening and fixed to the back of the ceiling.
[0003]
A decorative panel having an air outlet and a suction port is attached to the lower surface of the indoor unit main body and exposed to the room. The indoor unit main body accommodates a heat exchanger and a blower, and piping and wiring connected to the heat exchanger and the blower extend to the outside via a take-out portion provided in the indoor unit main body. .
As shown in FIG. 7A, the side plate portion Sa constituting the metal plate casing S combines two metal plate bodies that are bent in a plan view, and screws the ends of each other. To complete.
[0004]
The reason why the upper half and the lower half are not symmetric with respect to the horizontal central axis M-M in the figure is due to the presence or absence of the extraction portion Z of the piping / wirings. That is, since there is no take-out portion in the upper half portion, the right-angled portion is bent at an angle of 45 ° with priority on aesthetics.
A drain pump that discharges drain water collected in the drain pan to the outside is disposed on the right side of the lower half, and a take-out portion Z for taking out a drain hose connected to the pump is provided.
[0005]
In the lower half, in particular on the left side, a pipe Z connected to the heat exchanger and a take-out part Z for taking out the wiring connected through the electrical component box from the blower are provided. In order for the work in the take-out part Z to be optimal, both corners of the lower half are bent so as to be recessed parts with respect to the vertical plane and the horizontal plane.
If the take-out portion Z is described, as shown in an enlarged view in FIG. 7B, the inclined surface portion inclined obliquely horizontally from the bent portion C bent at an angle θ1 slightly larger than the right angle from the vertical surface. n is formed.
[0006]
It is bent at an angle θ2 larger than 180 ° from the edge of the inclined surface portion n, and an oblique vertical vertical inclined surface portion m is formed from the bent portion A. There is a bent portion B that is bent from the longitudinally inclined surface portion m at an angle θ3 that is slightly larger than a right angle.
Taking the folding method as a reference, the bent portion C is an inner fold that is bent to the inner surface side, and is also a mountain fold in which the bent portion protrudes outward. On the contrary, the bent portion A is an outer fold that is bent to the outer surface side, and is also a valley fold in which the bent portion protrudes inward. The bent portion B is an inner fold that is bent to the inner surface side, and is also a mountain fold in which the bent portion protrudes outward.
[0007]
[Problems to be solved by the invention]
By the way, the drain socket k which connects a drain hose is attached to the extraction part Z of the right side of a figure. Therefore, it is only necessary to provide a mounting hole in the inclined surface portion n, and there is almost no influence on the side plate portion Sa.
On the other hand, the extraction part Z on the left side of the figure is connected to the heat exchanger and connected to the electrical unit box with the wirings q connected to the indoor unit body. The entire part up to the middle part is cut off, and a groove for holding the pipe and the wiring is provided at the edge of the piece.
[0008]
Therefore, in this extraction part Z, the side plate part Sa and the heat insulating material are only about half the width of the other parts, resulting in a weak structure. Furthermore, since the side plate portion Sa is simply formed by bending a thin metal plate, a force for returning to the original flat plate naturally occurs when the side plate portion Sa is cut out to provide an extraction portion.
Since the bent portions C and B are inwardly folded (mountain folds), and the bent portion A between them is outwardly folded (valley fold), as shown by a two-dot chain line, the A portion is outward. As a result, it is deformed so as to become the A ′ portion, and accordingly, the B portion also tends to be deformed so as to come outside and become the B ′ portion.
[0009]
Conventionally, it is considered impossible to restrict the deformation of the side plate portion Sa, and a gap remains between the deformed side plate portion and the heat insulating material. The degree of the gap is not constant and may be slight, but the commercial value is inferior.
The present invention has been made paying attention to the above circumstances, and the purpose thereof is to provide strength without changing the basic configuration of the indoor unit main body when providing at least a pipe outlet in the indoor unit main body. An air conditioner indoor unit that provides sufficient reinforcement and prevents deformation is provided.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, the indoor unit of the air conditioner of the present invention has an indoor unit body composed of a metal plate housing and a heat insulating material incorporated in the inner surface of the ceiling plate opening of the air-conditioned room. The heat exchanger and the air blower mounted on the drain pan are accommodated in the indoor unit main body and fixed to the back of the ceiling. A part is missing and at least a pipe connected to the heat exchanger is held and an extraction part is provided to be taken out. A reinforcing fixture is attached to this extraction part, and the metal plate housing is firmly fixed to the heat insulating material. And restricting partial deformation of the metal plate housing. The reinforcing fixture is a metal fitting formed by bending a metal piece into a substantially U-shape, and inserts and holds one bent piece portion in a hook groove provided in the heat insulating material, and the other bent piece portion. A claw portion is provided at the distal end of the metal plate and inserted into and latched in a rotation-preventing hole provided in the metal plate housing, and is attached and fixed to the metal housing via an attachment.
[0011]
Furthermore, the intermediate piece formed between the bent pieces of the reinforcing fixing metal fitting is located along the end face of the heat insulating material and is sandwiched between the drain pan and the heat insulating material.
By providing means for solving such a problem, when providing at least a pipe outlet in the indoor unit main body, it is deformed with sufficient reinforcement in strength without changing the basic configuration of the indoor unit main body. To prevent.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing an indoor unit 10 of a ceiling-embedded air conditioner according to an embodiment of the present invention from the bottom side, FIG. 2 is an exploded perspective view of an indoor unit body 20, and FIG. It is the perspective view seen in the state where 20 was turned upside down.
The indoor unit 10 of the air conditioner includes an indoor unit main body 20 that is inserted from an indoor side through a mounting opening provided on a ceiling plate of an air-conditioned room and is suspended and fixed to a so-called ceiling behind a suspension bolt or the like. The decorative panel 100 is provided so as to be exposed and attached to the indoor side of the indoor unit body 20.
[0013]
The indoor unit main body 20 includes a metal plate housing (hereinafter referred to as a housing) 21 in which the lower surface opening portion 21a is all open and a metal plate is processed into a sheet metal to combine the top plate portion 21b and the side plate portion 21c.
A plan view of the housing 21 is exactly the same as that shown in FIG. 7, and a heat insulating material 22 made of, for example, a polystyrene foam material is incorporated into the inner surface of the housing 21 to form a heat insulating structure.
[0014]
A blower 23 is disposed in the center of the housing 21, and an indoor heat exchanger 24 including a pair of heat exchanger portions 24 a and 24 b formed in an L shape in plan view so as to surround the blower is accommodated. ing. An indoor heat exchanger formed in a square frame shape in plan view may be used.
The lower surface opening 21 a of the housing 21 is closed by the decorative panel 100. This decorative panel 100 is exposed indoors and shields the gap between the peripheral surface of the housing 21 and the mounting opening provided on the ceiling plate.
[0015]
The blower 23 includes a fan motor 23a attached and fixed to the upper surface portion of the housing 21 by an appropriate means, and a fan 23b attached to the rotation shaft of the fan motor. The blower 23 performs a blowing action of sucking air from the rotation axis direction and blowing it out in the circumferential direction as the fan 23b rotates.
The heat exchanger parts 24 a and 24 b constituting the indoor heat exchanger 24 are located in the blowing direction of the blower 23. The lower end portions of the heat exchanger portions 24a and 24b are inserted into a deformed rectangular frame-shaped drain pan 25 provided in the lower portion of the housing 21 so as to receive drain water generated in the heat exchanger portions. ing.
[0016]
A bell mouth 26 is provided between the suction port 110 of the decorative panel 100 and the blower fan 23 b, and the periphery thereof is surrounded by the drain pan 25. The bell mouth 26 is formed in a tapered shape having a small diameter on the blower fan 23b side and a large diameter on the suction port 110 side.
Furthermore, an electrical component box 27 is provided on a part of the inside of the drain pan 25. A control circuit for controlling electrical components such as the blower 23 is accommodated in the electrical component box 27.
[0017]
The decorative panel 100 is provided with a rectangular suction port 110 that occupies most of the center of the decorative panel 100, and the suction port 110 is provided substantially opposite to the inner surface of the drain pan 25.
A suction grill 111 is detachably attached to the suction port 110 of the decorative panel 100. The suction grill 111 shields the interior of the housing 21 from the suction port while allowing the indoor air to flow through the suction port 110.
[0018]
Further, air outlets 120 to 123 are provided along the sides of the suction port 110. These air outlets 120 to 123 have a rectangular shape whose longitudinal direction is extremely elongated with respect to the width direction, and is provided at four locations.
Each of the air outlets 120 to 123 is opposed to the gap between the outer side surface of the drain pan 25 and the heat insulating material 22 attached to the side surface portion of the housing 21, and is itself bent outward.
[0019]
Louvers connected to the louver mechanism are respectively attached to the air outlets 120 to 123 so as to guide and blow out to a wide area around the decorative panel 100.
Next, the take-out units 30 and 35 provided in the indoor unit body 20 will be described.
Concave portions a and b are formed on the left and right sides of the indoor unit body 20, respectively. A front portion of the left concave portion a shown in FIG. 1 and the right concave portion a shown in FIG. 3 is an extraction portion 30 for the drain hose.
[0020]
Concave portions a and b are formed on the left and right sides of the indoor unit body 20, respectively. A front portion of the left concave portion a shown in FIG. 1 and the right concave portion a shown in FIG. 3 is an extraction portion 30 for the drain hose.
As will be described later, any of the takeout portions 30 is provided in the recessed portions a and b because it is necessary to perform piping connection work. Therefore, the planar view shape is the same as that of the takeout portion Z previously shown in FIGS. It is the same as the planar view shape.
[0021]
A mounting hole (shown only in FIG. 3) 32 is provided through the side plate portion 21c constituting the housing 21 and the inner and outer surfaces of the heat insulating material 22, and the drain socket 31 is fitted and fixed in the mounting hole 32. The
The drain socket 31 protrudes to the outer surface side of the indoor unit body 20 and is connected to a drain hose (not shown) that extends to the outdoors. A drain hose is connected across the protruding portion of the drain socket 31 inside the indoor unit main body 20 and a discharge portion of a drain pump (not shown).
[0022]
The drain pump is disposed so as to be immersed in the drain water collected in the drain pan 25, and when the drain pan water level exceeds a predetermined amount, the drain pump is automatically driven to discharge the drain water. ing.
An extraction portion 35 for piping / wiring is provided in the front portion of the right concave portion b in FIG. In FIG. 2, the extraction part 35 is shown at a substantially front position of the side plate part 21c. In FIG. 3, an extraction portion 35 is shown in the left concave portion b of the heat insulating material 22.
[0023]
The take-out portion 35 includes a groove portion 36 that has been cut out from the side plate portion 21c of the housing 21 and the edge of the heat insulating material 22, and a pressing plate 37 made of a synthetic resin material that is attached to the groove portion.
In the take-out unit 35, the wirings 38 connected to the electrical component box 27 and the pipes 39 connected to the heat exchanger 24 are taken out from the indoor unit main body 20 at different height positions and are substantially parallel to each other. ing. The pipe 39 and the wiring 38 are held and fixed by the pressing plate 37.
[0024]
Furthermore, the groove part 36 which comprises the said extraction part 35, and the reinforcement fixture (reinforcement fixture) 40 attached to this extraction part are explained in full detail.
4 shows a groove portion 36 provided in the heat insulating material 22, FIG. 5 shows a part of the take-out portion 35 in a cross-section, and FIG. 6 shows the take-out portion 35 in an enlarged manner. Installed.
[0025]
The groove portion 36 includes a first vertical side portion d that is vertically cut from the upper end edge of the indoor unit body 20 to a substantially middle portion, and a first portion that is bent in a semicircular shape from the lowest point of the side portion. The curved side e is provided.
Further, there is an inclined side portion f that is inclined obliquely upward from the first bent side portion e, and there is a second bent side portion g that is bent in a semicircular shape from this uppermost point. It consists of the combination of the 2nd perpendicular | vertical edge part h cut perpendicularly | vertically from this 2nd curved edge part g.
[0026]
The first vertical side portion d is formed longer than the second vertical side portion h, and therefore the first bent side portion e is provided at a position deeper than the second bent side portion g. The first bent side e is formed with a radius larger than the radius of the second bent side g.
A pipe 39 connected to the heat exchanger 24 is inserted through the first bent side e as described above with reference to FIG. In other words, the first bent side e is provided at a position where the pipe 39 connected thereto is fitted as it is with the heat exchanger 24 incorporated in the indoor unit body 20.
[0027]
The wiring 38 extending from the electrical component box 27 is inserted into and extracted from the second bent side portion g. Since the wiring 38 is flexible, it is flexible, and even if there is dew on the pipe 39 connected to the heat exchanger 24, it is provided at a position where there is a distance where dew does not adhere.
In the heat insulating material 22 that forms such a groove portion 36, a hooking groove 41 is provided from the upper end surface of the heat insulating material 22 to a predetermined depth at a position spaced apart from the second vertical side portion h to a certain extent. It has been.
[0028]
The reinforcing fixing metal fitting 40 is formed by bending a rectangular metal piece thicker than the housing 21 into a substantially U shape, and the bent piece portions 40a and 40b at both ends and the intermediate portion between these bent piece portions. It consists of one piece 40c.
The tip of one bent piece 40a is bent obliquely, a screw hole 42 is provided in the center of the other bent piece 40b, and the tip is bent at a right angle outwardly with a claw 43. It has become.
[0029]
In the reinforcing fixture 40, one bent piece portion 40a is inserted into the engaging groove 41, and the distal end bent portion bites into the groove bottom portion and is in a fixed state. The other bent piece portion 40 b is in close contact with the end face perpendicular to the second vertical side portion h of the heat insulating material 22, and the intermediate piece portion 20 c is exposed on the end face of the heat insulating material 22.
In other words, the reinforcing fixing bracket 40 bent in a U-shape is inserted between the mating surface of the housing 21 and the heat insulating material 22 constituting the indoor unit body 20 and the engaging groove 41.
[0030]
In this state, the screw hole 42 provided in the piece 40 b of the reinforcing fixture 40 communicates with the hole 45 provided in the housing 21 and having a diameter slightly larger than the diameter of the screw hole 42. Then, the claw portion 43 at the tip of the one portion is inserted and latched in a rotation-preventing hole 46 provided in the housing 21.
Actually, a mounting screw (mounting tool) (not shown) is screwed into the screw hole 42 of the reinforcing fixture 40 through the hole 45, and the housing 21 and the reinforcing fixture 40 are fastened and fixed to each other.
[0031]
Since the claw portion 43 of the reinforcing fixing bracket 40 is inserted and latched in the anti-rotation hole 46, the rotation fixing to the reinforcing fixing bracket 40 is made even if the operator does not fix the connecting fixing bracket 40 with a finger. .
In a state where the housing 21 and the reinforcing fixing metal fitting 40 are fastened and fixed, the connection fixing metal fitting 40 is engaged with the engaging groove 41 of the heat insulating material 22, so that the housing 21 and the heat insulating material 22 are connected via the connection fixing metal fitting 40. The connection is fixed.
[0032]
The intermediate piece 40c formed between the two bent pieces 40a and 40b of the reinforcing fixing bracket 40 is exposed on the end face of the heat insulating material 22 in the state shown in the figure, but is attached to the indoor unit body 20 in the final assembly. By incorporating the drain pan 25, the intermediate piece is sandwiched between the drain pan and the heat insulating material.
In the indoor unit 10 of the ceiling-embedded air conditioner configured as described above, when the blower 23 is driven, indoor air is sucked into the indoor unit main body 20 through the suction grille 111 and the suction port 110, and the heat After heat exchange is performed in the exchanger 24, the air is blown out from the air outlets 120 to 123 to the indoor side.
[0033]
Here, the housing 21 and the heat insulating material 22 are connected and fixed using the connection fixing metal fitting 40, and the housing is reinforced. Therefore, even if the housing side plate portion 21c made of a thin metal plate is largely cut away in order to provide the piping / wiring extraction portion 35, the deformation as described above with reference to FIG. 7B can be reliably prevented.
The connecting and fixing bracket 40 itself has a very simple configuration in which a metal piece is bent into a substantially U shape, and an increase in parts cost is suppressed as much as possible. Since one bent piece portion 40a of the connection fixing metal fitting 40 is inserted into the engaging groove 41 provided in the heat insulating material 22, and the other bent piece portion 40b is simply screwed, the number of man-hours can be increased. It can be suppressed as much as possible.
[0034]
Further, since one bent piece portion 40a of the reinforcing fixing metal fitting 40 is inserted into the engaging groove 41 and the other bent piece portion 40b is interposed between the housing 21 and the heat insulating material 22, it is made of a metal material. However, there is no portion in contact with the heat exchange air (cold air) flowing through the indoor unit main body 20, and there is no fear of dew condensation.
The intermediate piece 40c of the reinforcing fixture 40 is exposed on the end face of the heat insulating material 22 in the attached state, but is finally interposed between the drain pan 25 and the heat insulating material 22. Therefore, it is possible to obtain an even stronger attachment to the connection fixture 40 and to avoid contact with heat exchange air (cold air) and there is no possibility of dew condensation.
[0035]
In the above-described embodiment, the take-out portion 35 that takes out the wiring 38 together with the pipe 39 is configured. However, the present invention is not limited to this, and any take-out portion that takes out the pipe may be used.
[0036]
That is, in the assembly work, the pipe 39 is connected to the heat exchanger 24 and is incorporated into the indoor unit main body 20, and since it is a combination of rigid bodies, the position of the take-out portion 35 needs to be set in advance. is there. On the other hand, since the wirings 38 and the hoses are made of a flexible material, they can be appropriately extended to a desired position.
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0037]
【The invention's effect】
As described above, according to the present invention, when providing an indoor unit main body with at least a pipe take-out portion, it is possible to prevent deformation by providing sufficient reinforcement without changing the basic configuration of the indoor unit main body. The effect which can be done is produced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention from the lower surface side.
FIG. 2 is an exploded perspective view showing the indoor unit main body according to the embodiment.
FIG. 3 is a perspective view of the assembled indoor unit main body according to the embodiment, which is shown upside down with respect to an actual attachment state.
4 is an enlarged perspective view of a pipe / wiring take-out portion according to the embodiment, in which a housing is omitted. FIG.
FIG. 5 is an enlarged perspective view of a pipe / wiring take-out portion according to the embodiment, in which a housing and a connecting fixture are shown in cross section.
FIG. 6 is an enlarged perspective view of a pipe / wiring extraction portion according to the embodiment;
FIG. 7 is a diagram for explaining a state of deformation in a conventional pipe / wiring take-out portion;
[Explanation of symbols]
21c ... side plate part,
21c ... top plate part,
21 ... Housing (metal plate housing),
22 ... heat insulation,
20 ... indoor unit body,
25 ... Drain pan,
24 ... heat exchanger,
23 ... Blower,
39 ... Piping,
38 ... Wiring,
35 ... Take out part,
40. Reinforcing fixture (reinforcing fixture),
41 ... hanging groove.

Claims (2)

An indoor unit body composed of a metal plate casing and a heat insulating material incorporated in the inner surface, fitted into the ceiling plate opening of the air-conditioned room, and fixed to the ceiling,
A heat exchanger housed in the indoor unit main body and placed on the drain pan, and a blower arranged to face the heat exchanger ,
The metal plate housing constituting the indoor unit main body and a part of the edge of the heat insulating material are missing, and at least a pipe connected to the heat exchanger is held out and taken out to the outside,
It is attached to the take-out part, and tightly fixes the metal plate casing to the heat insulating material, and includes a reinforcing fixture that regulates partial deformation of the metal plate casing ,
The reinforcing fixture is a metal piece formed by bending a metal piece into a substantially U shape, and one bent piece portion is inserted and latched in a hook groove provided in the heat insulating material,
The other bent piece portion is provided with a claw portion at the tip, is inserted and latched in a rotation-preventing hole provided in the metal plate housing, and is attached and fixed to the metal housing via a fixture. an indoor unit of an air conditioner, characterized in that that. Intermediate piece that is formed between the bent piece portion mutually of the reinforcing fixing bracket is positioned along the end face of the heat insulating material, and characterized in that it is sandwiched between the drain pan and the heat insulating material according Item 1. An air conditioner indoor unit according to Item 1 .

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