JP2023036210A - Ceiling embedded type indoor unit - Google Patents

Abstract

To provide a ceiling embedded type indoor unit that can be easily manufactured, and has a structure for restraining dripping of water droplets caused by condensation.SOLUTION: A ceiling embedded type indoor unit 10 comprises an indoor unit body 14, and a decorative panel 30 arranged on the side of a lower surface of the indoor unit body 14. The decorative panel 30 comprises a discharge port 34 for discharging air. A plurality of uneven parts 37 are formed in at least one surface of inner wall surfaces 36 of the discharge port. In the uneven parts 37, grooves formed by the uneven parts 37 extend in the vertical direction of the decorative panel 30.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to ceiling-mounted indoor units.

Patent Literature 1 discloses an air conditioner provided with a water drip prevention means that is not particularly conspicuous in appearance and improves appearance quality.
This air conditioner includes a box-shaped indoor unit main body arranged behind the ceiling of the air-conditioned room, and a decorative panel attached to the bottom surface of the indoor unit main body along the ceiling surface of the air-conditioned room. This is a ceiling-mounted air conditioner in which an air suction part and an air blowing part are provided on a panel. The air blowing portion includes a fixed blowing portion and rotating units arranged on both sides thereof, and has a raised portion projecting toward the air conditioning room from the panel surface of the decorative panel, and the raised portion has a plurality of protrusions as a whole. Dot-shaped crimps including portions are formed.

Japanese Patent No. 6730688

The present disclosure provides a ceiling-embedded indoor unit that can be easily manufactured and has a structure that suppresses dripping of water droplets caused by condensation.

The ceiling-embedded indoor unit according to the present disclosure is a ceiling-embedded indoor unit including an indoor unit main body and a decorative panel arranged on the lower surface side of the indoor unit main body, wherein the decorative panel is an air outlet for blowing out air. A plurality of uneven portions are formed on at least one surface of the inner wall surface of the outlet, and the grooves formed by the uneven portions extend in the vertical direction of the decorative panel.

The decorative panel of the ceiling-embedded indoor unit according to the present disclosure can be easily manufactured by removing the upper and lower molds. Furthermore, dripping of condensed water from the decorative panel can be suppressed.

Sectional view showing the internal structure of the ceiling-embedded indoor unit according to Embodiment 1 Perspective view of the ceiling-embedded indoor unit according to Embodiment 1 Fig. 3 is a perspective view of the periphery of the air outlet of the ceiling-embedded indoor unit in Embodiment 1 with the flap opened. Enlarged view of the dotted line part in Fig. 3 Bottom view around the outlet with the flap closed of the ceiling-embedded indoor unit according to Embodiment 1

(Knowledge, etc. on which this disclosure is based)
At the time when the inventors came up with the present disclosure, as a technology for suppressing the dripping of water droplets condensed on the ceiling-embedded indoor unit, a protruding portion protruding from the panel surface of the decorative panel toward the air conditioning room was provided. , there is a technique of forming a dot-like crimp including a plurality of convex portions on the entire raised portion (Patent Document 1). However, the inventors found a problem that when such a decorative panel is formed by a mold with upper and lower openings, it is difficult to remove from the mold because the texture is caught in the mold, making it difficult to manufacture. In order to solve this problem, the subject matter of the present disclosure has been formed.
Therefore, the present disclosure discloses a ceiling-embedded indoor unit that can suppress dripping of water droplets adhering to the decorative panel due to dew condensation or the like, and that facilitates manufacturing of the decorative panel.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters or redundant descriptions of substantially the same configurations may be omitted.
It should be noted that the accompanying drawings and the following description are provided for a thorough understanding of the present disclosure by those skilled in the art and are not intended to limit the claimed subject matter.

(Embodiment 1)
Embodiment 1 will be described below with reference to FIGS. 1 to 5. FIG.
[1-1. composition]
FIG. 1 is a cross-sectional view showing the internal structure of a ceiling-embedded indoor unit 10 of an air conditioner according to Embodiment 1 of the present disclosure. FIG. 2 is a perspective view of the ceiling-embedded indoor unit 10. FIG.
In the following description, up and down, inside and outside are explained based on the ceiling-embedded indoor unit 10 installed on the ceiling. A space into which air after air conditioning is blown out is defined as a room to be air-conditioned.

The ceiling-embedded indoor unit 10 is installed in the ceiling space 13 between the ceiling 11 of the building and the ceiling plate 12 installed below the ceiling 11 . The ceiling-embedded indoor unit 10 includes an indoor unit main body 14 and a decorative panel 30 covering a lower opening of the indoor unit main body 14. - 特許庁
The indoor unit main body 14 includes a substantially box-shaped housing 15 whose bottom surface is substantially entirely open. The indoor unit main body 14 includes a heat insulating member 16 made of polystyrene foam, an indoor heat exchanger 17, a blower 18, a drain pan 19 for receiving drain water from the indoor heat exchanger 17, and the blower 18. and a bell mouth 20 for rectifying the air flowing through.
Hanging fittings 21 are attached to the corners of the outer surface of the housing 15 . The indoor unit main body 14 is installed in a state of being suspended from the ceiling 11 by connecting the hanging metal fittings 21 to the hanging bolts 22 hanging down from the ceiling 11 .

The heat insulating member 16 is provided on the inner surfaces of the side plate 15 a and the top plate 15 b of the housing 15 to prevent condensation from occurring in the housing 15 .
The blower 18 is configured with a fan motor 23 and a centrifugal fan 24 . The fan motor 23 has a rotating shaft 23a extending downward, and the centrifugal fan 24 is fixed to the rotating shaft 23a.
The centrifugal fan 24 includes a disk-shaped main plate 24a fixed to the rotating shaft 23a, an annular shroud 24b arranged substantially coaxially with the main plate 24a below the main plate 24a, and a plurality of shrouds connecting the shroud 24b and the main plate 24a. wing 24c. A plurality of blades 24c are arranged at intervals in the circumferential direction of the main plate 24a.

The indoor heat exchanger 17 is formed by bending a plate-shaped heat exchanger into a substantially rectangular shape in a plan view so as to surround substantially the entire fan 18 from the sides.
The indoor heat exchanger 17 functions as a refrigerant evaporator during cooling operation, and functions as a refrigerant evaporator during heating operation. The indoor heat exchanger 17 exchanges heat between indoor air sucked into the indoor unit main body 14 and the refrigerant, and cools the air in the air-conditioned room during cooling operation and heats the indoor air during heating operation. is configured so that

The drain pan 19 is arranged below the indoor heat exchanger 17 so as to receive drain water generated in the indoor heat exchanger 17 . The drain pan 19 is made of polystyrene foam.
The drain pan 19 is formed in a substantially rectangular plate shape so as to close substantially the entire opening of the lower surface of the housing 15 . The drain pan 19 has a drain pan side suction port 25 (suction passage) through which the air sucked by the blower 18 passes in the central portion in plan view.

The decorative panel 30 is formed in a substantially rectangular plate shape in plan view so as to cover the opening on the lower surface of the indoor unit main body 14 .
A panel-side suction port 31 communicating with the bell mouth 20 is formed in the central portion of the decorative panel 30 . A suction grille 32 covering a panel-side suction port 31 is detachably attached to the decorative panel 30. - 特許庁A filter 33 for removing dust in the air is provided on the indoor unit main body 14 side of the suction grill 32 .

Air outlets 34 are formed outside the panel-side intake port 31 of the decorative panel 30 and along each side of the outer peripheral portion of the decorative panel 30 to send air after air conditioning to the room to be conditioned. That is, the air outlets 34 are provided along each side of the substantially rectangular decorative panel 30 in plan view, and air is blown out in four directions from the air outlets 34 .
Each of the outlets 34 is provided with a flap 35 (FIG. 2) capable of adjusting the blowing direction.

FIG. 3 is a perspective view of the vicinity of the outlet 34 with the flap 35 of the ceiling-embedded indoor unit 10 opened, and FIG. 4 is an enlarged view of the dotted line portion of FIG.
The outlet 34 is formed by being surrounded by an inner wall surface 36 .
Further, the decorative panel 30 has an outer wall surface 38 erected outside the outlet 34 , and an outer bottom surface 40 is formed continuously with the outer wall surface 38 on the outer side of the outer wall surface 38 .

As shown in FIG. 4, of the inner wall surface 36, a downstream inner wall surface (inner wall surface) 36a located on the downstream side of the air blown out from the air outlet 34 (on the side of the outer wall surface 38 of the air outlet 34) has a curved surface. is formed in The downstream inner wall surface 36a is arc-shaped such that the upper edge of the downstream inner wall surface 36a extends vertically and the lower edge of the downstream inner wall surface 36a extends horizontally.
The downstream inner wall surface 36 a has a plurality of uneven portions 37 . Each uneven portion 37 extends linearly in a bottom view of the decorative panel 30, and extends vertically along the downstream inner wall surface 36a. In addition, the concave and convex portions 37 have the same width and are arranged in parallel at regular intervals.
That is, grooves extending in the vertical direction of the decorative panel 30 are formed by the plurality of uneven portions 37 formed on the downstream inner wall surface 36a.

The concave-convex portion 37 has a downstream inner wall surface 36a extending to the lower portion along the horizontal direction, and a rising portion 37a at the lower end of the concave-convex portion 37 rises from the bottom surface of the concave-convex portion 37 at an obtuse angle.
Further, the cross-sectional shape of the uneven portion 37 is substantially arc-shaped.
Therefore, the surface of the downstream inner wall surface 36a, including the uneven portion 37, does not have a hidden portion in the bottom view of the decorative panel 30 excluding the flap 35. As shown in FIG. That is, the downstream inner wall surface 36a has a shape that does not have an undercut.

In the present embodiment, the width of the uneven portion 37 and the interval between the uneven portions 37 are set so that the contact angle between the downstream inner wall surface 36a and water droplets condensed on the downstream inner wall surface 36a is small. .

As shown in FIG. 4 , the outer wall surface 38 is flat and has a plurality of second uneven portions 39 .
Each second concave-convex portion 39 extends linearly in the vertical direction of the decorative panel 30 along the outer wall surface 38 from the upper end of the outer wall surface 38 . The second uneven portions 39 have the same width and are arranged in parallel at equal intervals.
Accordingly, grooves extending in the vertical direction of the decorative panel 30 are formed by the plurality of second uneven portions 39 formed on the outer wall surface 38 .

The cross-sectional shape of the second uneven portion 39 is substantially arc-shaped.
Furthermore, the upper end portion 39 a of the second uneven portion 39 is in contact with the outer bottom surface 40 .
Therefore, the outer wall surface 38, including the second uneven portion 39, does not have a hidden portion in the bottom view of the decorative panel 30. As shown in FIG. That is, the outer wall surface 38 including the second uneven portion 39 has a shape that does not have an undercut.

Further, in the present embodiment, the width of the second uneven portion 39 and the interval between the second uneven portions 39 are set so that the contact angle between the outer wall surface 38 and water droplets condensed on the outer wall surface 38 is small. be done.

FIG. 5 is a plan view of the decorative panel 30 in which the vicinity of the outlet 34 is enlarged with the flap 35 closing the outlet 34. FIG.
As shown in FIG. 5 , when the flap 35 closes the outlet 34 , the uneven portion 37 is covered with the flap 35 over the entire longitudinal region of the flap 35 . In other words, the uneven portion 37 extends from the position of the tip of the flap 35 (dotted line F in FIG. 5) when the flap 35 closes the outlet 34 to one side closer to the center of the ceiling-embedded indoor unit 10. is formed only
As a result, even if water droplets drip from the uneven portion 37, the water droplets adhere to the flap 35, so that dripping of the water droplets into the air-conditioned space can be suppressed.

[1-2. motion]
The operation and action of the ceiling-embedded indoor unit 10 configured as described above will be described.
During operation of the ceiling-embedded indoor unit 10, the rotation of the blower 18 causes the air in the room to be air-conditioned to be sucked from the panel-side suction port 31 (FIG. 1) and sent to the indoor heat exchanger 17 via the bell mouth 20. be done.
This air exchanges heat when passing through the indoor heat exchanger 17, and during the cooling operation of the ceiling-mounted indoor unit 10, the air is deprived of heat and the temperature decreases. Sometimes heat is given and the temperature rises. After the heat exchange, the air is blown out from the outlet 34 to the room to be conditioned.
The air that has passed through the blowout port 34 flows in the direction according to the orientation of the flap 35 . In addition, when the ceiling-embedded indoor unit 10 is stopped, the flap 35 is stationary so as to close the outlet 34 .

When the ceiling-embedded indoor unit 10 performs cooling operation, as described above, the air in the room to be conditioned is cooled by exchanging heat with the indoor heat exchanger 17, and this air is discharged from the outlet 34 again. sent into the room. Therefore, in the indoor heat exchanger 17, air with a high temperature and a large amount of saturated water vapor is cooled, and becomes air with a low temperature and a small amount of saturated water vapor. Therefore, drain water is generated in the indoor heat exchanger 17 . This drain water is received by a drain pan 19 provided below the indoor heat exchanger 17, sucked by a drain pump (not shown), and discharged to the outside.

During cooling operation of the ceiling-embedded indoor unit 10, dew condensation water also occurs on the decorative panel 30. - 特許庁In particular, in the vicinity of the outlet 34 from which air that is colder than the air in the room to be conditioned is blown, dew condensation water tends to occur on the outer wall surface 38 and the downstream inner wall surface 36a on the downstream side of the blown air.
The water droplets of this dew condensation water grow or aggregate, and when they reach a certain size or more, they drop due to their own weight.

In the present disclosure, the downstream inner wall surface 36a at a position where condensed water is likely to occur has a plurality of uneven portions 37 extending in the vertical direction.
Therefore, the condensed water droplets adhering to the downstream inner wall surface 36 a are separated from each other by the uneven portion 37 . As a result, the condensed water droplets are prevented from coming into contact with each other in the horizontal direction and gathering together. Therefore, the droplets of the condensed water are suppressed from becoming large.
Further, the width of the uneven portion 37 and the interval between the uneven portions 37 are set so that the contact angle between the downstream inner wall surface 36a and the water droplets condensed on the downstream inner wall surface 36a is small.
Therefore, the surface area of the water droplets adhering to the downstream inner wall surface 36a is increased, and the evaporation of the water droplets is accelerated.

Further, in the present disclosure, the outer wall surface 38 at a position where dew condensation water is likely to occur has a plurality of second uneven portions 39 extending in the vertical direction.
Therefore, the condensed water droplets adhering to the outer wall surface 38 are separated from each other by the second uneven portion 39 . As a result, the condensed water droplets are prevented from coming into contact with each other in the horizontal direction and gathering together. Therefore, the droplets of the condensed water are suppressed from becoming large.
Further, the width of the second uneven portion 39 and the interval between the second uneven portions 39 are set so that the contact angle between the outer wall surface 38 and water droplets condensed on the outer wall surface 38 is small.
As a result, the surface area of water droplets adhering to the outer wall surface 38 is increased, and evaporation of the water droplets is accelerated.

[1-3. effects, etc.]
As described above, the ceiling-embedded indoor unit 10 according to the present embodiment includes the indoor unit main body 14 and the decorative panel 30 arranged on the lower surface side of the indoor unit main body 14. 10, the decorative panel 30 has a blowout port 34 for blowing out air, and a plurality of uneven portions 37 are formed on at least one surface (downstream side inner wall surface 36a) of an inner wall surface 36 of the blowout port 34. , grooves formed by the concave and convex portions 37 extend in the vertical direction of the decorative panel 30 .
As a result, the downstream inner wall surface 36a can have a structure without an undercut, so that the decorative panel 30 can be easily manufactured with a mold structure in which the upper and lower parts are removed. Furthermore, the decorative panel 30, which can be easily manufactured, prevents the condensation water droplets adhering to the downstream inner wall surface 36a from increasing during the cooling operation of the ceiling-embedded indoor unit 10. It is possible to suppress dripping of water droplets into the harmony chamber. In addition, since evaporation of water droplets adhering to the downstream inner wall surface 36a is promoted by the uneven portion 37, dripping of water droplets into the room to be adjusted can be further suppressed.

As in the present embodiment, the decorative panel 30 includes an outer wall surface 38 standing outside the outlet 34, and the outer wall surface 38 is formed with a plurality of second uneven portions 39. In the portion 39 , grooves formed by the second uneven portion 39 extend in the vertical direction of the decorative panel 30 .
As a result, the outer wall surface 38 including the second concave-convex portion 39 can be formed into a shape that does not have an undercut, so that the decorative panel 30 can be easily manufactured with a mold structure that removes the top and bottom. Furthermore, the decorative panel 30, which can be easily manufactured, suppresses the growth of condensed water droplets adhering to the outer wall surface 38 during the cooling operation of the ceiling-embedded indoor unit 10. It is possible to suppress the dripping of water droplets. In addition, the evaporation of the water droplets adhering to the outer wall surface 38 is promoted by the second concave-convex portion 39, so that dripping of water droplets into the room to be adjusted can be further suppressed.

Further, as in the present embodiment, the decorative panel 30 is provided with a flap 35 that is provided at the air outlet 34 and adjusts the air blowing direction. It may be configured to be covered by flaps 35 .
As a result, when the ceiling-embedded indoor unit 10 is stopped, it is blocked by the flap 35 from the side of the room to be harmonized, making it difficult to see the uneven portion 37 . Therefore, the uneven portion 37 can be made inconspicuous in terms of the appearance design. Therefore, the design of the ceiling-embedded indoor unit 10 is improved.

(Other embodiments)
As described above, Embodiment 1 has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like.
Therefore, other embodiments will be exemplified below.

In Embodiment 1, as an example of the inner wall surface 36 having a plurality of uneven portions, the downstream inner wall surface 36a positioned downstream of the air blown out from the outlet 34 has a plurality of uneven portions 37. explained that there is It is sufficient that the inner wall surface has a plurality of uneven portions formed on at least one surface. For example, the entire surface of the inner wall surface 36 may have an uneven portion. Therefore, the inner wall surface 36 on which the uneven portion is provided is not limited to only one surface of the downstream inner wall surface 36a.

In Embodiment 1, the concave-convex portion 37 and the second concave-convex portion 39 having a substantially arc-shaped cross section are described as examples of the concave-convex portion and the second concave-convex portion provided on the downstream inner wall surface 36a and the outer wall surface 38. . The cross-sectional shapes of the concave-convex portion and the second concave-convex portion provided on the downstream inner wall surface 36a and the outer wall surface 38 may be any shape as long as the downstream inner wall surface 36a and the outer wall surface 38 do not have an undercut. Therefore, the concave-convex portion provided on the downstream inner wall surface 36a and the second concave-convex portion provided on the outer wall surface 38 are not limited to the concave-convex portion 37 and the second concave-convex portion 39 having a substantially arc-shaped cross section.

Note that the above-described embodiment is for illustrating the technology in the present disclosure, and various changes, replacements, additions, omissions, etc. can be made within the scope of the claims or equivalents thereof.

INDUSTRIAL APPLICABILITY The present disclosure is applicable to ceiling-mounted indoor units for air conditioning.

REFERENCE SIGNS LIST 10 ceiling-embedded indoor unit 11 ceiling 12 ceiling plate 13 ceiling space 14 indoor unit body 15 housing 15a side plate 15b top plate 16 heat insulating member 17 indoor heat exchanger 18 blower 19 drain pan 20 bell mouth 21 hanging bracket 22 bolt 23 fan Motor 23a Rotating shaft 24 Centrifugal fan 24a Main plate 24b Shroud 24c Blade 25 Drain pan side suction port 30 Decorative panel 31 Panel side suction port 32 Suction grille 33 Filter 34 Air outlet 35 Flap 36 Inner wall surface 36a Downstream inner wall surface (inner wall surface)
37 uneven portion 37a rising portion 38 outer wall surface 39 second uneven portion 39a upper end portion 40 outer bottom surface

Claims (3)

A ceiling-embedded indoor unit comprising an indoor unit main body and a decorative panel arranged on the lower surface side of the indoor unit main body,
The decorative panel has an outlet for blowing air,
A plurality of uneven portions are formed on at least one surface of the inner wall surface of the outlet,
The ceiling-embedded indoor unit, wherein the concave-convex portion has a groove formed by the concave-convex portion extending in the vertical direction of the decorative panel. The decorative panel has an outer wall surface standing outside the outlet,
A plurality of second uneven portions are formed on the outer wall surface, and in the second uneven portions, grooves formed by the second uneven portions extend in the vertical direction of the decorative panel. The ceiling-embedded indoor unit according to claim 1. The decorative panel includes a flap that is provided at the air outlet and adjusts the air blowing direction,
3. The ceiling-embedded indoor unit according to claim 1, wherein the uneven portion is covered by the flap when the flap closes the outlet.

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