JPH1019370A - Ceiling cassette type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate maintenance of a component such as an electric heater held inside a case body, by a construction wherein a storage space part formed by bending in a recessed shape like the letter U in a plan view is provided integrally on the lower side of one lateral side of a bellmouth and an electrical component box shaped like the letter U in a plan view is disposed ion the storage space part. SOLUTION: When a blower 21 is driven with execution of a refrigerating cycle operation, air in a room to be air-conditioned is suckled into a case body 20 through a grille and a filter, straightened by a bellmouth, 27 subjected to heat exchange with a refrigerant in a heat exchanger 25 and let out as air- conditioning air into the room to be air-conditioned through outlet 24 formed in the outer peripheral part of a drain pan 23, and others. In this case, the bellmouth 27 is constructed of a bellmouth main body part 27A having a curricular part of which the upper end part is connected to a suction part of the lower 21 and of a storage space part 27B provided integrally with an continuously to the bellmouth main body part 27A for storing an electrical component box 28 and formed virtually in a shape like the letter U of which the opposite side parts are slant obliquely in a plane view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling cassette type air conditioner, and more particularly to an improvement in a bell mouth, an electric component box, and a housing structure.

[0002]

2. Description of the Related Art FIGS. 10 and 11 show a conventional ceiling cassette type air conditioner. In the figure, reference numeral 1 denotes a housing, which has an octagonal shape with four rectangular corners dropped in a plan view, and is open only on the lower surface side.

[0003] A blower 2 is arranged at a substantially central portion in the housing 1, and a bell mouth 3 is connected to a lower surface portion which is an intake port of the blower. In a space along the outer peripheral portion of the blower 2, a rectangular annular heat exchanger 4 partially missing in a plan view is arranged. In other words, the blower 2 includes the heat exchanger 4
Surrounded by

[0004] The heat exchanger 4 is supported by a drain plate 5 fitted into an opening on the lower surface of the housing 1. A plurality of outlets 6 are opened in the drain plate 5 along the inside of each of the vertical and horizontal sides of the housing 1.

A bellmouth mounting plate 7 is fitted into a space between the inner peripheral surface of the drain plate 5 and the outer peripheral surface of the bellmouth 3. The bell mouth 3 is attached and fixed to the bell mouth attachment plate 7 by an appropriate means.

Further, an electric component box 8 is mounted on the bell mouth mounting plate 7 by an appropriate means. The electric component box 8 accommodates electric components necessary for drive control of the blower 2 and electric components for transmitting a detection signal of a room temperature sensor (not shown) to a control unit.

[0007] With such a configuration, the bell mouth mounting plate 7 and the drain pan 5 divide the air inlet side passage and the air outlet side passage of the heat exchanger 4.

On the other hand, an electric heater 9 used as an auxiliary heat source at the time of heating is arranged inside the housing 1. The position of the electric heater 9 is set almost immediately above the electric component box 8.

A decorative panel 10 is provided on the lower opening of the housing 1.
Is inserted into the room to be air-conditioned R from the ceiling plate S.
In the decorative panel 10, a panel outlet 10a having the same shape and area is opened at a position facing the outlet 6.

A panel suction opening 10b having the same shape and area is opened at a position facing the inner peripheral surface of the drain pan 5. This panel suction port 10b has a filter 1
1 is fitted and covered with grill 12.

In addition, there is an air conditioner of this type in which fresh outside air can be introduced into the room to be air-conditioned R if necessary. Specifically, a chamber mounting type in which a chamber is mounted between the housing 1 and the ceiling panel S and an external air duct is connected to the chamber, or a direct external air intake type in which the external air duct is directly mounted on the housing 1.
In this direct outside air intake type, an outside air intake air passage is constituted by dedicated parts. (Not shown)

[0012]

The conventional ceiling cassette type air conditioner is constructed as described above, and has a comfortable air conditioning without any trouble in the air conditioning function.
However, structurally, there are the following problems.

That is, in order to rectify the blown air,
Since the bellmouth mounting plate 7 is required in addition to the bellmouth 3, the cost of parts is increased. In order to secure the suction area of the blower 2, the volume of the electric component box 8 is regulated.

When the electric heater 9 arranged in the housing 1 is to be maintained, after removing the decorative panel 10, it is necessary to remove the electric component box 8, the bell mouth 3, and the bell mouth mounting plate 7 from the three parts. It takes time and effort.

In the case of an air conditioner capable of taking in outside air, of a chamber-mounted type, the height of the housing is increased due to the installation of the chamber, and the ceiling space (between the ceiling plate and the space above the ceiling) is small. Installation is not possible under certain conditions.

Since the chamber is sold separately, the cost of the chamber increases. When installing the air conditioner, an operation of screwing the housing and the chamber is required, which is troublesome.

In the case of the direct outside air intake type, a dedicated part must be attached to the outside air intake air passage. In order to prevent the blast air flow from becoming turbulent due to the wall of the outside air intake air passage, a rectifying-dedicated component must be installed. In the seal of the air suction side passage and the air discharge side passage of the heat exchanger,
There are problems such as the necessity of special parts.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to facilitate maintenance of components housed in a housing, for example, an electric heater, and to provide a suction air. It is an object of the present invention to provide a ceiling cassette type air conditioner in which the ventilation resistance is reduced and a sufficient volume is secured in the electric component box.

A second object is to make the housing easy to take in the outside air by not requiring significant improvement and separate parts in the housing, and to reliably seal the air suction side passage and the air discharge side passage of the heat exchanger. An object of the present invention is to provide a ceiling cassette type air conditioner capable of surely suppressing turbulence of a blowing airflow and improving blowing efficiency.

[0020]

Means for Solving the Problems In order to satisfy the first object, a ceiling cassette type air conditioner according to a first aspect of the present invention is characterized in that: A blower disposed in the section, a heat exchanger disposed along the periphery of the blower, a drain plate provided in a lower portion of the heat exchanger, and a suction port of the blower formed in a lower portion of the blower. And a bell mouth that partitions an air suction side passage and an air outlet side passage of a heat exchanger together with the drain pan, and an outlet formed in an outer peripheral portion of the drain pan, and one side of the bell mouth. A storage space portion integrally provided on the lower surface side and bent and formed in a flat concave shape, and an electric component box arranged in the storage space portion and having a flat concave shape are provided.

According to a second aspect of the present invention, in the blower according to the first aspect, the installation center position is shifted by a predetermined distance from the center of the housing to a side opposite to a side where the electric component box is arranged. It is characterized by being set.

According to a third aspect of the present invention, the electric component box according to the first aspect is characterized in that a side surface of the suction port of the bell mouth is formed as an inclined surface which is inclined so as to gradually expand outward.

In order to satisfy the second object, a ceiling cassette type air conditioner according to a second aspect of the present invention is characterized in that, as a fourth aspect, a housing having an opening on the lower surface side and a blower arranged substantially in the center of the housing. And a heat exchanger arranged along the periphery of the blower, a drain plate provided below the heat exchanger, and a suction port of the blower formed below the blower, and together with the drain plate A bell mouth that partitions an air suction side passage and an air discharge side passage of the heat exchanger,
An outlet formed on an outer peripheral portion of the drain dish, and a foam insulating material attached along an inner peripheral surface of the housing,
An external air intake hole that is opened on a side surface portion of the housing, and an external air intake air passage that is provided in the foam heat insulating material and communicates the external air intake hole and the suction port of the bell mouth. Features.

According to a fifth aspect of the present invention, the heat exchanger according to the fourth aspect is formed in an annular shape in which a part is missing, and an end of the annular heat exchanger is formed on a wall constituting the wind path for taking in outside air. Abutting and restricting outflow of air from inside to outside between the heat exchanger ends.

According to a sixth aspect of the present invention, in the outside air intake air path according to the fourth aspect, a surface facing the heat exchanger is set as an air blowing passage, and a corner angle of the air blowing passage surface is larger than 90 °. It is characterized by being large.

By providing means for solving the above-mentioned problems, the invention according to claims 1 to 3 facilitates maintenance of components housed in the housing, for example, electric heaters, etc. In addition, the ventilation resistance of the intake air is reduced, and a sufficient volume is secured in the electric component box.

According to the fourth to sixth aspects of the present invention, the housing has a structure that facilitates the intake of outside air by not requiring a significant improvement or a separate part, and the air inlet side passage and the air outlet side passage of the heat exchanger. The seal of the air flow is surely suppressed, and the turbulent airflow is reliably suppressed.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a ceiling cassette type air conditioner corresponding to the first invention. And
FIGS. 1 to 3 show a first embodiment, and FIGS. 4 and 5 show a second embodiment.

First, the first embodiment shown in FIGS. 1 to 3 will be described. In the figure, reference numeral 20 denotes a housing. The housing 20 has an octagonal shape with four rectangular corners dropped in plan view, and has a configuration in which side walls are integrally provided along each side. The lower surface of the housing is open.

The blower 2 is mounted on the upper wall 20a of the housing 20.
1 is mounted and fixed by an appropriate means. The axial direction of the fan motor 21a is oriented vertically, and the fan 21b is fitted on a rotating shaft projecting downward.

In particular, as shown in FIGS. 2B and 3B, the center position Ob of the blower 21 is set at a position deviated from the center position Oa of the housing 20. And the above-mentioned housing 2
The heat insulating material 22 shown only in FIG. Installed in contact.

A drain pan 23 having exactly the same outer dimensions as the heat insulating material 22 is placed on the lower side of the heat insulating material 22 and attached in close contact with the inner peripheral surface of the side wall of the housing 20. .

In the drain plate 23, outlets 24 are respectively opened along long sides in the vertical and horizontal directions. Drain plate 2
At a substantially central position of 3, a bell mouth mounting hole 26 is formed, which is partially circular and the remaining portion is straight.

The space between the outlet 24 of the drain plate 23 and the bell mouth mounting hole 26 is formed in a concave cross section, and supports the heat exchanger 25 here. The upper end of the heat exchanger 25 is in contact with the inner peripheral surface of the upper wall of the housing 20, and the heat exchanger 25 is interposed between the housing 20 and the drain plate 23. To be more specific, the heat exchanger 25 is arranged in a space along the outer peripheral portion in the housing 20, has a substantially rectangular shape in plan view, and has some corner portions missing.

A bell mouth 27 is fitted into the bell mouth mounting hole 26 of the drain plate 23. The bell mouth 27 has a circular portion whose upper end is connected to the suction portion of the blower 21 and a portion inclined downward and outward from the circular portion. It comprises a bell mouth main body 27A having a hooking portion, and a storage space 27B integrally provided with the bell mouth main body and accommodating an electric component box 28 described later.

That is, the storage space 27B is
The bell mouth 27 is provided on one lower surface of one side, and is formed in a substantially concave shape in which both sides are obliquely inclined in plan view. The concave inner portion protrudes in the central axis direction of the fan 21b so as to hold the outer peripheral end of the fan 21b, and has a vertical wall surface corresponding to the height of the bell mouth main body 27A.

The electric component box 28 has a substantially concave shape which is exactly the same as the storage space 27B in plan view.
The thickness (height dimension) is the same as the vertical wall surface of the storage space 27B, and is aligned here.

The electric component box 28 is attached and fixed to the storage space 27B by an appropriate means. The inside accommodates electric components necessary for drive control of the blower 21 and electric components for transmitting a detection signal of a room temperature sensor (not shown) to the control unit.

In particular, as shown in FIG. 2B, the position of the electric component box 28 is set so as to be shifted from the center position Oa of the housing 20 in a direction opposite to the center position Ob of the blower 21. Have been.

With such a configuration, the opening on the lower surface side of the bell mouth 27 is formed as a suction port. Then, the bell mouth 27 and the drain plate 23 allow the air suction side passage, which is a position before the heat exchange of the heat exchanger 25, to be performed,
The air outlet side passage, which is the position after the heat exchange, is defined.

On the other hand, an electric heater 29 used as an auxiliary heat source during heating is disposed inside the housing 20. The position of the electric heater 29 is set at substantially the same position as the electric component box 28.

As shown in FIG. 2 only, a decorative panel 30 is fitted into the opening on the lower surface of the housing 20, and is exposed from the ceiling plate S into the room to be air-conditioned. In the decorative panel 30, a panel outlet 30a having the same shape and area is opened at a position facing the outlet 24.

A panel suction port 30b having the same shape and area is opened at a position facing the inner peripheral surface of the drain plate 23. A filter 31 is provided in the panel suction port 30b.
Is fitted, and this filter is covered with a grill 32.

In the ceiling cassette type air conditioner having such a configuration, when the blower 21 is driven together with the refrigeration cycle operation, the air to be conditioned R air flows from the panel suction port 30b of the decorative panel 30 via the grill 32 and the filter 31. It is sucked into the housing 20.

Then, the heat is rectified by the bell mouth 27 and is conducted through the heat exchanger 25 via the blower 21 to exchange heat with the refrigerant guided there. This heat exchange air is blown out to the room to be air-conditioned from the blowout port 24 opened on the outer peripheral portion of the drain plate 23 and the panel blowout port 30a of the decorative panel 30.

The bell mouth 27 has a bell mouth main body 27A in which a bell mouth mounting hole 26 provided in the drain plate 23 and a suction portion of the blower 21 are connected.
Since the shape is inclined from the lower outside to the upper inside, the rectification efficiency of the intake air is good.

With respect to the center position Oa of the housing 20, the blower 21
Since the electric component box 28 is mounted at a position where the center position Ob is shifted and opposite to the blower center position, a larger volume of the electric component box 28 can be secured.

Further, maintenance of the electric heater 29 accommodated in the housing 20 is performed as required. At this time, the decorative panel 30 is removed, and the drain plate 23, the bell mouth 27, and the electric component box 28 are exposed.

Then, the electric component box 28 and the bell mouth 27
Remove. As shown in FIG. 3, the drain plate 23 may be left as it is. Since the electric heater 29 is exposed at the opening on the inner peripheral side of the drain plate 23, the operator can reach out between the blower 21 and the drain plate 23 to remove the electric heater 29.

That is, the bell mouth 27 is attached to the electric component box 2.
Since the heater 8 is attached, the electric heater 29 is exposed only by removing the bell mouth 27 substantially, so that maintenance can be easily performed and workability is good.

FIGS. 4 and 5 show a second embodiment.
As shown in the figure, the electric component box 28A here has only the inclined surface a on the inner surface of the concave shape. The inclined surface a is gradually inclined from the upper part to the lower part and from the inside to the outside.

On the other hand, the bell mouth body 27a of the bell mouth 27 is gradually expanded from the upper part to the lower part from the inside to the outside as described above. Therefore, in the state of FIG. 4 in which the electric component box 28A is attached, the wind is efficiently and smoothly guided to the suction port of the bell mouth by the operation of the blower 21, and the ventilation resistance of the suction air is further reduced. The rectification effect can be improved.

FIGS. 6 to 9 show a ceiling cassette type air conditioner according to a second invention. 6 to 8 show a first embodiment. The basic configuration of the ceiling cassette type air conditioner shown here is the same as that described above.

That is, as shown in FIG. 6, the ceiling cassette type air conditioner has a housing 20, a blower 21 and a heat exchanger 25 arranged in the housing, and a heat exchanger 25 fitted in an opening on the lower surface of the housing. Drain plate 23A supporting exchanger
And a decorative panel 30 attached to the lower surface of the housing and a foamed heat insulating material 22A attached to a part of the inner peripheral surface of the housing. (Bell mouth is omitted.) Here, the housing 20A, the foam insulation 22A, the drain plate 23A, and a part of the heat exchanger 25A, respectively.
Due to the features described below, reference numerals different from those of the present invention are given. Since other components are the same, the same numbers are assigned and new explanations are omitted.

That is, the partial side wall 2 of the housing 20A
At 0b, an outside air intake hole 35 is opened. An outside air duct 36 communicating with the outside air intake hole 35 is attached to the side wall 20b.

An end (not shown) of the outside air duct 36 is
It is connected to the outside air intake opening on the wall of the house so that it can guide the intake of outside air. A shutter mechanism is provided at the outside air intake of the house wall so that opening and closing can be remotely controlled from the room to be air-conditioned.

In the foamed heat insulating material 22A, a guide hole 36 communicating with the outside air intake hole 35 in the side wall of the housing 20 is opened in the side wall 22a. A bulging auxiliary wall 37 is integrally formed on the inner surface of the side wall 22a where the guide hole 36 is provided.

The bulging auxiliary wall 37 is made of the foamed heat insulating material 22A.
Is opened at the lower surface portion, and the upper surface portion is closed by the foam heat insulating material upper surface wall 22b. The space formed by the auxiliary bulging wall 37 from the guide hole 36 is referred to as an outside air intake air passage 38.

The above-mentioned drain dish 23A is provided with a foam heat insulating material 22.
At the same position as the outside air intake air passage 38 formed at A, an outside air intake air passage 39 having the same shape is provided. The air passage 39 is opened at the upper surface and the lower surface of the drain plate 23A.

Accordingly, the outside air intake air passage 38 of the foam insulation 22A and the outside air intake air passage 39 of the drain plate 23A communicate with each other. In particular, as shown in FIGS.
Here, the heat exchanger 25A is composed of a pair of heat exchanger bodies A, A having an L-shape in plan view, and their ends are separated and symmetrically arranged.

The outside air intake air passages 38, 39
The end portions of the heat exchanger bodies A, A on the side are connected to each other by a shielding plate 40. That is, the outside air flowing out of the outside air intake air passages 38 and 39 is shielded by the shield plate 40 so that the pair of heat exchanger bodies A and A
Intrusion into the air outlet side passage between each other is prevented, and all the air is guided to the air inlet side passage.

The ends of the heat exchangers A, A opposite to the ends connected by the shielding plate 40 are connected to each other by a pair of ridges b, provided on a part of the inner peripheral wall of the foamed heat insulating material 22A. b, and here also prevents the outside air that has turned around the heat exchanger bodies A, A from entering the air outlet side passage.

This is a ceiling cassette type air conditioner configured as described above,
When 1 is driven, the air to be conditioned R air is sucked into the housing 20A from the panel suction port 30b of the decorative panel 30 via the grill 32 and the filter 31.

Then, the heat is rectified by a bell mouth (not shown) and is conducted to the heat exchanger 25A via the blower 21 to exchange heat with the refrigerant guided there. The heat exchange air is supplied to an outlet 24 opened on the outer peripheral portion of the drain plate 23A.
The air is blown out from the panel outlet 30a of the decorative panel 30 to the room R to be air-conditioned.

When the shutter of the outside air duct 36 is opened as required, outside air is guided to the outside air intake hole 35 via the outside air duct. Then, the air flows along the air passages 38 and 39 between the foamed heat insulating material 22A and the drain plate 23A. When it comes out of the outside air intake air passage 39 of the drain plate 23A, it mixes with the suction air of the room to be air-conditioned guided through the suction port 30b of the decorative panel 30.

This mixed suction side air is guided to the heat exchanger 25A via the blower 21, exchanges heat, and is blown out from the outlet 24 and the panel outlet 30a to the room R to be air-conditioned. Therefore, the heat exchange air that takes in fresh outside air air-conditions the air-conditioned room R.

Further, the shielding plate 40 is provided with the air passage 3 for taking in outside air.
Seals between the air suction side passage and the air blowout side passage of the heat exchanger 25A with respect to the outside air guided to 8, 39 can be reliably performed, and the heat exchange efficiency can be improved.

The outside air intake hole 35 and the outside air intake air passages 38 and 39 are formed by the existing housing 23A and the foam insulation 2.
It can be obtained only by a partial modification of 2A and drain plate 23A,
No dedicated chamber is required. Therefore, installation work is not required, workability can be greatly improved, and the cost of parts can be reduced.

The embodiment shown in FIGS. 9A to 9C may be adopted as a sealing structure in place of the shielding plate 40. First, the sealing structure shown in FIG. 9A will be described. The bulging auxiliary wall 37A constituting the outside air intake air passages 38, 39 protrudes the inner wall surface to increase the wall thickness. In this state, a pair of heat exchanger bodies A, A
Notches 41, 41 engaging with the ends are provided.

Therefore, similarly to the above-described shield plate 40, the wall surface of the swelling auxiliary wall 37A forms a seal between the air suction side passage and the air discharge side passage of the heat exchanger 25A. No board is required.

In FIG. 9B, the wall of the auxiliary bulging wall 37B is made thicker on the inside and is provided with notches 41, 41 which engage with the pair of heat exchangers A, A end. The seal between the air suction side passage and the air discharge side passage is still the same. However, both sides c, c of the bulging auxiliary wall 37B are cut out in a direction orthogonal to the longitudinal direction of the heat exchanger body A here.

Therefore, even if the blown airflow passing through the heat exchanger 25A collides with the bulging auxiliary wall 37B, the acute angle concave portions d, d are formed as shown in FIG. Since there is no turbulence, blast noise can be reduced.

In FIG. 7C, the wall surface of the bulging auxiliary wall 37C is thickened only on both sides. The inner surfaces are engaged with the pair of heat exchanger bodies A, A, and form a seal between the air suction side passage and the air discharge side passage of the heat exchanger 25A. Also in this case, both side portions c, c of the bulging auxiliary wall 37C are provided in a direction orthogonal to the longitudinal direction of the heat exchanger body.

Therefore, even if the airflow passing through the heat exchanger collides with the bulging auxiliary wall 37C,
Since the acute-angled concave portions d and d as shown in FIG. 3A are not formed, turbulence does not occur and the blowing noise can be reduced.

In FIG. 9D, the shielding plate 40 described above is used.
Are connected between the end portions of the pair of heat exchanger bodies A, A, and the sealing of the air inlet side passage and the air outlet side passage of the heat exchanger 25A remains unchanged.

Here, the inner wall surface of the swelling auxiliary wall 37D is parallel to the shield plate 40 with a small gap, and both sides e, e are formed in a mountain shape larger than 90 °. Makes an outlet passage.

Therefore, the blast air flow is smoothly guided along the air blowing passage, which is the wall surface of the bulging auxiliary wall 37D, so that turbulence does not occur and the blast noise can be reduced.

[0078]

As described above, according to the first aspect of the present invention, a storage space is formed integrally on one lower side of the bell mouth so as to be bent into a flat concave shape. Since the electric component box having the concave shape is arranged, it is possible to obtain an effect of facilitating maintenance of the components housed in the housing, for example, the electric heater.

According to the second aspect of the present invention, since the blower is mounted at a position shifted by a predetermined distance from the center of the housing to a side opposite to the side on which the electric parts box is arranged, The box can secure a sufficient volume.

According to the third aspect of the present invention, the electric component box has a side surface of the suction opening of the bell mouth which is inclined so as to gradually expand outward, so that the ventilation resistance of the suction air is reduced. Blowing efficiency can be improved.

According to the fourth aspect of the present invention, an outside air intake hole is opened in the side surface of the housing, and an outside air intake air passage communicating the outside air intake hole and the suction mouth of the bell mouth is provided in the foamed heat insulating material. This has the effect of simplifying the intake of outside air by eliminating the need for significant improvements and separate components in the housing.

According to the fifth aspect of the present invention, the heat exchanger is formed in an annular shape with a part missing, and an end of the annular heat exchanger is brought into contact with a wall constituting an air passage for taking in outside air, and the heat exchanger end is formed. Since the outflow of air from the inside to the outside between the parts is restricted, and in the invention of claim 6, the outside air intake air passage is set on the surface facing the heat exchanger as an air blowing passage. Since the corner angle of the air outlet passage surface is larger than 90 °, the air inlet side passage and the air outlet side passage of the heat exchanger are securely sealed, and the turbulence of the blown air flow is reliably suppressed to improve the blowing efficiency. Can be improved.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the first invention.
The exploded perspective view of a ceiling cassette type air conditioner.

FIG. 2A is a schematic longitudinal sectional view of the ceiling cassette type air conditioner of the embodiment. (B) is a bottom view with the decorative panel removed.

FIG. 3A is a longitudinal sectional view of the ceiling cassette type air conditioner of the embodiment with a bell mouth and an electric component box removed. (B) is the bottom view.

FIG. 4 is a schematic longitudinal sectional view of a ceiling cassette type air conditioner with a decorative panel removed according to a second embodiment of the present invention.

FIG. 5 is an exemplary perspective view of the electric component box according to the embodiment;

FIG. 6 shows the first embodiment of the second invention.
The exploded perspective view of a ceiling cassette type air conditioner.

FIG. 7 is a schematic longitudinal sectional view of the ceiling cassette type air conditioner of the embodiment.

FIG. 8 is a schematic bottom view of the ceiling cassette type air conditioner of the embodiment with the decorative panel removed.

FIG. 9A is a schematic bottom view of a ceiling cassette type air conditioner with a decorative panel removed according to the second embodiment of the present invention. (B) is a schematic bottom view of the ceiling cassette type air conditioner of the third embodiment of the present invention with a decorative panel removed. (C) is a schematic bottom view of the ceiling cassette type air conditioner of the fourth embodiment of the present invention with a decorative panel removed. (D) is the fifth invention of the present invention.
The bottom view of the outline of the ceiling cassette type air conditioner which removed the decorative panel of embodiment of FIG.

FIG. 10A is a schematic bottom view of a conventional ceiling cassette type air conditioner with a decorative panel removed. (B) is a schematic longitudinal sectional view of the ceiling cassette type air conditioner.

FIG. 11 is a bottom view of a conventional ceiling cassette type air conditioner with a bellmouth mounting plate, a bellmouth, and an electric component box removed.

[Explanation of symbols]

 20, 20A: housing, 21: blower, 25, 25A: heat exchanger, 23, 23A: drain plate, 27: bell mouth, 24: outlet, 27B: storage space, 28, 28A: electric component box, a ... Slope surface (of the electric component box), 22A ... Foam insulation, 35 ... Outlet for taking in outside air, 38,39 ... Air passage for taking in outside air, 37C ... Air blowing passage (bulging auxiliary wall).

Claims (6)

[Claims] 1. A housing having an open lower surface, a blower disposed substantially at the center of the housing, a heat exchanger disposed along the periphery of the blower, and a heat exchanger provided below the heat exchanger. A drain dish, a bell mouth which forms a suction port of the blower below the blower, and separates the air suction side passage and the air discharge side passage of the heat exchanger together with the drain dish, and an outer periphery of the drain dish A ceiling cassette type air conditioner provided with an outlet formed in a portion, a storage space portion integrally provided on one lower surface of the bell mouth and bent and formed in a flat concave shape, A ceiling cassette type air conditioner, comprising: an electric component box arranged in a space portion and having a flat concave shape. 2. The blower according to claim 1, wherein a center position of the blower is set at a position shifted by a predetermined distance from a center of the housing to a side opposite to a side where the electric component box is arranged. A ceiling cassette type air conditioner characterized by that: 3. The ceiling cassette type air conditioner according to claim 1, wherein the side surface of the suction opening of the bell mouth is formed as an inclined surface which is inclined so as to gradually open outward. Machine. 4. A housing having an open lower surface, a blower disposed substantially at the center of the housing, a heat exchanger disposed along the periphery of the blower, and a heat exchanger provided below the heat exchanger. A drain dish, a bell mouth which forms a suction port of the blower below the blower, and separates the air suction side passage and the air discharge side passage of the heat exchanger together with the drain dish, and an outer periphery of the drain dish In a ceiling cassette type air conditioner provided with an outlet formed in a portion and a foam heat insulating material stuck along the inner peripheral surface of the housing, an outside air intake hole opened in a side portion of the housing. A ceiling cassette type air conditioner, comprising: a foam air-insulating material; and an outside air intake air passage communicating between the outside air intake hole and the suction port of the bell mouth. 5. The heat exchanger according to claim 4, wherein the heat exchanger is formed in an annular shape in which a part thereof is missing, and an end of the annular heat exchanger is in contact with a wall constituting the outside air intake air passage. A ceiling cassette type air conditioner characterized by restricting outflow of air from inside to outside between heat exchanger ends. 6. The air passage for taking in outside air according to claim 4,
A ceiling cassette type air conditioner, characterized in that a surface facing the heat exchanger is set as an air outlet passage, and a corner angle of the air outlet passage surface is larger than 90 °.