AU2018271442B2

AU2018271442B2 - Indoor unit for air conditioner

Info

Publication number: AU2018271442B2
Application number: AU2018271442A
Authority: AU
Inventors: Hirokazu DOI; Daisuke FUKAHORI; Yasuhiro Ohishi
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2017-05-24
Filing date: 2018-04-13
Publication date: 2021-04-01
Anticipated expiration: 2038-04-13
Also published as: JP2018197637A; WO2018216392A1; EP3614064B1; CN110537059A; AU2018271442A1; CN110537059B; ES2887855T3; JP6409908B1; EP3614064A1; EP3614064A4

Abstract

This indoor unit for an air conditioner is provided with: a casing (1); a centrifugal fan (30) which is disposed in the casing (1); a heat exchanger (40) which is disposed in the casing (1) so as to surround two or three sides of the centrifugal fan (30); and a partition part (50) which together with the heat exchanger (40) surrounds the centrifugal fan (30), and which connects one end of the heat exchanger (40) with another end of the heat exchanger (40), and guides blown out air of the centrifugal fan (30) from the side of the one end of the heat exchanger (40) to the side of the other end of the heat exchanger (40). The distance (L) between the centrifugal fan (30) and the partition part (50) is longer at the side of the other end of the heat exchanger (40) than at the side of the one end of the heat exchanger (40).

Description

DESCRIPTION TITLE OF INVENTION: INDOOR UNIT FOR AIR CONDITIONER TECHNICAL FIELD

[0001]

The present invention relates to an indoor unit for

an air conditioner.

BACKGROUND ART

[0002]

A conventional indoor unit for an air conditioner

includes a heat exchanger having a U shape, a partition

with which an opening of the heat exchanger is covered, and

a turbo fan surrounded with the heat exchanger and the

partition and configured to suck in and blow out air in two

directions via the heat exchanger (see,. for example, JP

2015-81692 A (Patent Literature 1).

[0003]

In the indoor unit for an air conditioner, the

partition has a protrusion extending toward the turbo fan.

This configuration achieves equalization of an airflow from

the protrusion toward a first end of the partition and an

airflow from the protrusion toward a second end of the

partition.

CITATION LIST PATENT LITERATURE

[0004] Patent Literature 1: JP 2015-81692 A

SUMMARY OF INVENTION TECHNICAL PROBLEM

[0005] According to the conventional indoor unit for an air conditioner, air is guided in a rotation direction of the turbo fan in a region from the protrusion to the first end of the partition. On the other hand, air is guided in the opposite direction to the rotation direction of the turbo fan in a region from the protrusion to the second end of the partition.

[0006] The conventional indoor unit for an air conditioner accordingly makes unusual noise at a high-pressure spot occurring near an end of the partition. It is an object of the present invention to address one or more shortcomings of the prior art and/or provide a useful alternative.

[0007] Hence, the present invention provides an indoor unit for an air conditioner, the indoor unit being capable of suppressing occurrence of a high-pressure spot near an end of a partition to thereby reduce unusual noise.

SOLUTIONS TO PROBLEM

[0008] An aspect of the present invention provides an indoor unit for an air conditioner, the indoor unit including: a casing; a centrifugal fan disposed in the casing; a heat exchanger disposed in the casing such that the centrifugal fan is surrounded by the heat exchanger on two or three sides; a partition with which the centrifugal fan is surrounded in conjunction with the heat exchanger, the partition being connected to a first end of the heat exchanger and a second end of the heat exchanger and configured to guide air blown out by the centrifugal fan from the first end of the heat exchanger to the second end of the heat exchanger, wherein: a distance between the centrifugal fan and the partition at a position near the second end of the heat exchanger is longer than that at a position near the first end of the heat exchanger, a part having the second end of the heat exchanger extends beyond the first end of the heat exchanger toward a wall of the casing, and the air from the centrifugal fan is blown out through a blow-out port located on a side opposite from the partition with respect to the centrifugal fan.

[0009] According to the configuration described above, the partition guides the air blown out by the centrifugal fan from the first end of the heat exchanger to the second end of the heat exchanger, so that air flowing along the partition flows in a rotation direction of the centrifugal fan. This configuration therefore reduces pressure near an end of the partition. This configuration thus suppresses occurrence of a high-pressure spot near the end of the partition to thereby reduce unusual noise.

[0010]

In addition, the distance between the centrifugal fan

and the partition at the position near the second end of

the heat exchanger is longer than that at the position near

the first end of the heat exchanger. This configuration

therefore achieves reduction in pressure near a downstream

end of the partition. This configuration thus achieves

further reduction in pressure near the downstream end of

the partition, which improves an effect of reducing unusual

noise.

[00111

In the indoor unit for an air conditioner according

to an embodiment,

the distance between the centrifugal fan and the

partition gradually increases from the first end of the

heat exchanger toward the second end of the heat exchanger.

[0012]

According to the embodiment described above, the distance between the centrifugal fan and the partition gradually increases from the first end of the heat exchanger toward the second end of the heat exchanger. This configuration therefore enables suppression of collision between air flowing from the centrifugal fan to the heat exchanger and air flowing along the partition. This configuration thus further improves the effect of reducing unusual noise.

[0013] As is described above, a part having the second end of the heat exchanger extends beyond the first end of the heat exchanger toward a wall of the casing.

[0014] According to the embodiment described above, the part having the second end of the heat exchanger extends beyond the first end of the heat exchanger toward the wall of the casing. This configuration therefore achieves increase in distance between the centrifugal fan and the second end of the heat exchanger. This results in pressure reduction near the second endofthe secondheatexchanger.

[0015] As is described above, the air from the centrifugal fan is blown out through a blow out port located on a side opposite from the partition with respect to the centrifugal fan.

[0016] According to the embodiment described above, air from the centrifugal fan is blown out through the blow-out port located on the side opposite from the partition with respect to the centrifugal fan. The air from the centrifugal fan therefore smoothly flows from the partition to the blow-out port. This configuration thus suppresses occurrence of turbulence of air from the centrifugal fan, at an air flow path from the partition to the blow-out port.

ADVANTAGEOUS EFFECT OF INVENTION

[0017] The present invention thus provides an indoor unit for an air conditioner, the indoor unit being capable of suppressing occurrence of a high-pressure spot near an end of a partition to thereby reduce unusual noise.

BRIEF DESCRIPTION OF DRAWINGS

[0018] FIG. 1 is a perspective view of an indoor unit for an air conditioner according to an embodiment of the present invention.

FIG. 2 is another perspective view of the indoor

unit.

FIG. 3 is a bottom view of the indoor unit.

FIG. 4 is a sectional view taken along line IV-IV in

FIG. 3.

FIG. 5 is a bottom view of the indoor unit from which

a panel, a drain pan, and the like are detached.

FIG. 6 is a bottom view of the indoor unit which is

illustrated in FIG. 5 and to which a flap is attached.

FIG. 7 is a bottom view of the indoor unit from which

the flap is detached.

FIG. 8 is a top view of a partition plate in the

indoor unit.

FIG. 9 is a perspective view of the partition plate.

FIG. 10 is a bottom view of the partition plate.

DESCRIPTION OF EMBODIMENTS

[0019]

A specific description will be given of an indoor

unit for an air conditioner according to the present

invention, based on embodiments illustrated in the

drawings.

[0020]

FIG. 1 is a perspective view of an indoor unit for an air conditioner according to an embodiment of the present invention, the indoor unit being seen obliquely from below.

FIG. 2 is a perspective view of the indoor unit seen

obliquely from above.

[0021]

As illustrated in FIGS. 1 and 2, the indoor unit

according to this embodiment is designed to be embedded in

a ceiling, and includes a casing main body 1, a panel 2

having a quadrilateral shape, the panel 2 being mounted to

a lower side of the casing main body 1, and a grille 3

detachably mounted to the panel 2. The casing main body 1,

the panel 2, and the grille 3 constitute an example of a

casing.

[0022]

The indoor unit also includes a pipe connection part

, a pipe connection part 6, and a drain socket 7 each

protruding from a sidewall of the casing main body 1. In

the casing main body 1, each of the pipe connection parts 5

and 6 is connected to an external refrigerant pipe (not

illustrated). Also in the casing main body 1, the drain

socket 7 is connected to an external drain hose (not

illustrated).

[0023]

The indoor unit also includes an electrical component

8 disposed on the sidewall of the casing main body 1 and juxtaposed with the pipe connection parts 5 and 6 and the drain socket 7.

[0024]

The panel 2 has a blow-out port 10. The blow-out

port 10 is located on one of longitudinally opposite sides

of the grille 3 so as to extend along a shorter side of an

outer edge of the panel 2. The panel 2 also has a flap 20

pivotably mounted thereto and configured to open and close

the blow-out port 10. In FIG. 1, the flap 20 closes the

blow-out port 10.

[0025]

The indoor unit according to this embodiment also

includes hanger fittings 101, 102, 103, and 104 (the hanger

fitting 104 is illustrated in FIG. 5). The hanger fittings

101, 102, 103, and 104 are secured to hanger bolts (not

illustrated) suspended from, for example, a framework in a

roof-space. The indoor unit is thus suspended from a

ceiling.

[0026]

FIG. 3 is a bottom view of the indoor unit. In FIG.

3, the same constituent elements as those illustrated in

FIGS. 1 and 2 are denoted with the same reference signs as

those for the constituent elements illustrated in FIGS. 1

and 2.

[0027]

The flap 20 has a U shape in plan view, and is

configured to control a direction of air blown out through

the blow-out port 10.

[0028]

More specifically, the flap 20 includes a flap main

body 20a extending along a pivot axis 21, a first auxiliary

flap 20b elongated from a first end of the flap main body

a, and a second auxiliary flap 20c elongated from a

second end of the flap main body 20a.

[0029]

The first auxiliary flap 20b is elongated from the

first end of the flap main body 20a so as to extend in a

direction away from the blow-out port 10 in the casing main

body 1. The first auxiliary flap 20b is linked to a

stepping motor 80 with a link mechanism 90.

[0030]

The second auxiliary flap 20c is elongated from the

second end of the flap main body 20a so as to extend in the

direction away from the blow-out port 10 in the casing main

body 1. In other words, the second auxiliary flap 20c and

the first auxiliary flap 20b extend in parallel.

[0031]

The stepping motor 80 is disposed in a space defined

by the casing main body 1, the panel 2, and the grille 3.

The stepping motor 80 and the flap 20 are arranged adjacent to each other in a direction perpendicular to the pivot axis of the flap 20. The stepping motor 80 is located on a side opposite from the blow-out port 10 with respect to the pivot axis 21 in the casing main body 1. The stepping motor 80 generates a driving force for turning the flap 20.

The flap 20 receives the driving force from the stepping

motor 80 through the link mechanism 90 to turn about the

pivot axis 21. The stepping motor 80 may be closer to a

blow-out port 10 side than the pivot axis 21 is in the

casing main body 1.

[0032]

As illustrated in FIG. 3, the casing main body 1 (see

FIGS. 1 and 2) has in its center a suction port la. A

filter 4 (see FIG. 4) is disposed between the suction port

la and the grille 3.

[0033]

It should be noted that the blow-out port 10 in the

casing main body 1 and a first wall 11 (see FIG. 5) of the

casing main body 1 are on the same side.

[0034]

FIG. 4 is a sectional view taken along line IV-IV in

FIG. 3. In FIG. 4, the same constituent elements as those

illustrated in FIGS. 1 to 3 are denoted with the same

reference signs as those for the constituent elements

illustrated in FIGS. 1 to 3.

[0035]

The casing main body 1 houses therein a turbo fan 30.

The turbo fan 30 is driven by a motor 31 to rotate in a

predetermined rotation direction. The predetermined

rotation direction corresponds to a counterclockwise

direction when the turbo fan 30 is seen from below. The

turbo fan 30 is an example of a centrifugal fan.

[0036]

The casing main body 1 also houses therein a bell

mouth 32 at a position between the suction port la and the

turbo fan 30. The turbo fan 30 sucks in indoor air via a

space inside the bell mouth 32.

[0037]

The casing main body 1 also houses therein a heat

exchanger 40 and a partition plate 50 at a position around

the turbo fan 30. Air from the turbo fan 30 is blown out

via the heat exchanger 40 through the blow-out port 10

located opposite the partition plate 50 with respect to the

turbo fan 30. At this time, the partition plate 50 guides

to the heat exchanger 40 the air from the turbo fan 30.

The partition plate 50 is an example of a partition. The

partition may constitute a part of the casing main body 1.

[0038]

The casing main body 1 also houses therein a drain

pan 60 at a position below the heat exchanger 40 and partition plate 50. The drain pan 60 thus receives dew condensation water caused by condensation at each of the heat exchanger 40 and the partition plate 50.

[0039]

The casing main body 1 has an air flow path P for

guiding air from the turbo fan 30 to the blow-out port 10

in the panel 2.

[0040]

FIG. 5 is a bottom view of the indoor unit from which

the panel 2, the drain pan 60, and the like are detached.

[0041]

The casing main body 1 includes a first wall 11

located near the blow-out port 10, a second wall 12

opposite to the first wall 11, a third wall 13 diagonally

opposite to the first wall 11 and the second wall 12, and a

fourth wall 14 diagonally opposite to the first wall 11 and

the second wall 12 and opposite to the third wall 13. Each

of the third wall 13 and the fourth wall 14 has an end near

the blow-out port 10, the end being elongated from the

first wall 11. Each of the third wall 13 and the fourth

wall 14 has an end opposite to the blow-out port 10, the

end being elongated from the second wall 12. The second

wall 12 is an example of a wall of a casing.

[0042]

The second wall 12 includes a third wall 13-side portion 12a and a fourth wall 14-side portion 12b. The fourth wall 14-side portion 12b is closer to the first wall

11 than the third wall 13-side portion 12a is. In the

second wall 12, the fourth wall 14-side portion 12b where

the pipe connection parts 5 and 6 are disposed is recessed

toward the first wall 11. An intermediate portion 12c is

located between the third wall 13-side portion 12a and the

fourth wall 14-side portion 12b, and is tilted relative to

each of the third wall 13-side portion 12a and the fourth

wall 14-side portion 12b.

[0043]

The heat exchanger 40 is disposed between the turbo

fan 30 and the first wall 11, third wall 13, and fourth

wall 14 of the casing main body 1.

[0044]

More specifically, the heat exchanger 40 includes a

first heat exchange part 41, a second heat exchange part

42, and a third heat exchange part 43. The first heat

exchange part 41, the second heat exchange part 42, and the

third heat exchange part 43 are formed integrally. The

first heat exchange part 41, the second heat exchange part

42, and the third heat exchange part 43 may be formed

separately. For example, the first heat exchange part 41,

the second heat exchange part 42, and the third heat

exchange part 43 may be spaced apart from one another.

[0045]

The first heat exchange part 41 is disposed opposite

the first wall 11 of the casing main body 1, and extends

along the first wall 11.

[0046]

The second heat exchange part 42 is disposed opposite

the third wall 13 of the casing main body 1, and extends

from the first wall 11 toward the second wall 12. The

second heat exchange part 42 is located upstream of the

first heat exchange part 41 in a rotation direction R of

the turbo fan 30. The drain pump 70 is disposed between a

distal end, or tip, of the second heat exchange part 42 and

the third wall 13-side portion of the second wall 12.

[0047]

The drain pump 70 sucks in dew condensation water and

the like retained in the drain pan 60, and discharges the

sucked dew condensation water and the like toward the drain

socket 7. In other words, the drain pump 70 is a pump for

discharging, from the casing main body 1, dew condensation

water and the like in the casing main body 1.

[0048]

The third heat exchange part 43 is disposed opposite

the fourth wall 14 of the casing main body 1, and extends

from the first wall 11 toward the second wall 12. The

third heat exchange part 43 is located downstream of the first heat exchange part 41 in the rotation direction R of the turbo fan 30. The distal end of the second heat exchange part 42 is closer to the second wall 12 than a distal end, or tip, of the third heat exchange part 43 is.

In other words, the distal end of the second heat exchange

part 42 is located at a place that is relatively far from

the blow-out port 10, and the distal end of the third heat

exchange part 43 is located at a place that is relatively

close to the blow-out port 10. The distal end of the

second heat exchange part 42 is an example of a second end

of a heat exchanger. The distal end of the third heat

exchange part 43 is an example of a first end of the heat

exchanger.

[0049]

The distal end of the third heat exchange part 43 is

connected to the pipe connection part 5 with a refrigerant

pipe 85. The distal end of the third heat exchange part 43

is connected to the pipe connection part 6 with a

refrigerant pipe 86.

[0050]

The pipe connection parts 5 and 6 respectively

connect the refrigerant pipes 85 and 86 inside the casing

main body 1 to refrigerant pipes outside the casing main

body 1. The pipe connection parts 5 and 6 allow a

refrigerant to flow into the heat exchanger 40.

[0051]

A distance between the second heat exchange part 42

and the third heat exchange part 43 gradually increases

from the blow-out port 10 in a direction away from the

blow-out port 10. Specifically, the heat exchanger 40 has

a U shape in plan view. The distance between the second

heat exchange part 42 and the third heat exchange part 43

may be fixed or may be substantially fixed. The heat

exchanger 40 may have, for example, a V shape or a circular

shape in plan view.

[0052]

The partition plate 50 and the heat exchanger 40

surround the turbo fan 30. The partition plate 50 is

connected to the distal end of the second heat exchange

part 42 and the distal end of the third heat exchange part

43. The partition plate 50 guides air blown out by the

turbo fan 30 from the distal end of the third heat exchange

part 43 to the distal end of the second heat exchange part

42. A distance L between the turbo fan 30 and the

partition plate 50 at a position near the distal end of the

second heat exchange part 42 is longer than that at a

position near the distal end of the third heat exchange

part 43. More specifically, the distance L between the

turbo fan 30 and the partition plate 50 gradually increases

from the distal end of the third heat exchange part 43 toward the distal end of the second heat exchange part 42.

The distance L between the turbo fan 30 and the partition

plate 50 may increase in a stepwise manner.

[00531

FIG. 6 illustrates the indoor unit which is

illustrated in FIG. 5 and to which the flap 20 (diagonally

shaded) is attached. FIG. 7 illustrates the indoor unit

from which the flap 20 is detached. In FIGS. 6 and 7, the

same constituent elements as those illustrated in FIGS. 1

to 5 are denoted with the same reference signs as those for

the constituent elements illustrated in FIGS. 1 to 5.

[0054]

As illustrated in FIG. 6, the flap main body 20a, the

first auxiliary flap 20b, and the second auxiliary flap 20c

are located so as not to overlap the heat exchanger 40 in

plan view. The flap main body 20a extends along the first

wall 11 of the casing main body 1. The first auxiliary

flap 20b extends along the third wall 13 of the casing main

body 1. The second auxiliary flap 20c extends along the

fourth wall 14 of the casing main body 1. Each of the

first and second auxiliary flaps 20b and 20c has a distal

end, or tip, located near the second wall 12 of the casing

main body 1.

[0055]

As illustrated in FIGS. 6 and 7, the blow-out port 10 includes a first blow-out port part 10a having a rectangular shape and extending along the first wall 11 of the casing main body 1, a second blow-out port part lob, and a third blow-out port part 10c. The second blow-out port part lob is elongated from a first end of the first blow-out port part 10a, and extends toward the third wall

13 of the casing main body 1. The second blow-out port

part lob is then bent to extend toward the second wall 12

of the casing main body 1. The third blow-out port part

loc is elongated from a second end of the first blow-out

port part 10a, and extends toward the fourth wall 14 of the

casing main body 1. The third blow-out port part 10c is

then bent to extend toward the second wall 12 of the casing

main body 1.

[0056]

FIG. 8 is a top view of the partition plate 50. FIG.

9 is a perspective view of the partition plate 50 seen

obliquely from above. FIG. 10 is a bottom view of the

partition plate 50.

[0057]

The partition plate 50 includes a partition plate

main body 50a having a curved shape, and a flange 50b

disposed on an upper end of the partition plate main body

a. A distance between an inner peripheral face of the

partition plate main body 50a and an inner peripheral edge of the turbo fan 30 corresponds to the distance L between the turbo fan 30 and the partition plate 50. More specifically, the distance L corresponds to a distance from an intersection A to an intersection B, the intersection A being an intersection of a ray that radially extends from a center of the turbo fan 30 toward the partition plate main body 50a and the outer peripheral edge of the turbo fan 30, the intersection B being an intersection of the ray and the inner peripheral face of the partition plate main body 50a.

The flange 50b extends from an upstream end of the

partition plate main body 50a toward a downstream end of

the partition plate main body 50a. Specifically, the

flange 50b extends by about two-thirds of the length of the

partition plate main body 50a.

[0058]

According to the indoor unit having the configuration

described above, when the turbo fan 30 is driven, then the

turbo fan 30 blows out air, and the air flows from the

distal end of the third heat exchange part 43 toward the

distal end of the second heat exchange part 42 in the

region between the turbo fan 30 and the partition plate 50.

The air from the turbo fan 30 then passes through the heat

exchanger 40, flows through the air flow path P, and

reaches the blow-out port 10 in the panel 2.

[0059]

As described above, the air in the region between the

turbo fan 30 and the partition plate 50 flows in the

rotation direction R of the turbo fan 30. This

configuration therefore achieves reduction in pressure near

the upstream end of the partition plate 50 and pressure

near the downstream end of the partition plate 50. The

indoor unit having the configuration described above thus

suppresses occurrence of a high-pressure spot near the

upstream end of the partition plate 50 and a high-pressure

spot near the downstream end of the partition plate 50 to

thereby reduce unusual noise.

[0060]

In addition, the distance L between the turbo fan 30

and the partition plate 50 at the position near the distal

end of the second heat exchange part 42 is longer than that

at the position near the distal end of the third heat

exchange part 43. This configuration therefore achieves

reduction in pressure near the downstream end of the

partition plate 50. This configuration thus achieves

further reduction in pressure near the downstream end of

the partition plate 50, which further improves the effect

of reducing unusual noise.

[0061]

The distance L between the turbo fan 30 and the

partition plate 50 gradually increases from the distal end of the third heat exchange part 43 toward the distal end of the second heat exchange part 42. This configuration therefore enables suppression of collision between air flowing from the turbo fan 30 to the second heat exchange part 42 and air flowing along the partition plate 50. This configuration thus further improves the effect of reducing unusual noise.

[0062]

A part having the distal end of the second heat

exchange part 42 extends beyond the distal end of the third

heat exchange part 43 toward the second wall 12 of the

casing main body 1. This configuration therefore achieves

increase in distance between the turbo fan 30 and the

distal end of the second heat exchange part 42. This

results in pressure reduction near the distal end of the

second heat exchange part 42.

[0063]

Air from the turbo fan 30 is blown out through the

blow-out port 10 located on a side opposite from the

partition plate 50 with respect to the turbo fan 30. The

air from the turbo fan 30 therefore smoothly flows from the

partition plate 50 to the blow-out port 10. This

configuration thus suppresses occurrence of turbulence of

air from the turbo fan 30, at an air flow path from the

partition plate 50 to the blow-out port 10.

[0064]

In this embodiment, the casing of the indoor unit has

a rectangular parallelepiped shape and is constituted of

the casing main body 1, the panel 2, and the grille 3;

however, the shape of the casing is not limited thereto.

[0065]

Also in this embodiment, the indoor unit is designed

to be embedded in a ceiling; however, the indoor unit is

not limited thereto. Alternatively, the present invention

is also applicable to an indoor unit designed to be

suspended from a ceiling.

[0066]

Also in this embodiment, the indoor unit has the

blow-out port 10 through which air is blown out in one

direction via the heat exchanger 40. Alternatively, the

indoor unit may have blow-out ports through which air is

blown out in two directions or in three directions via the

heat exchanger 40.

[0067]

Also in this embodiment, the casing main body 1

houses therein the heat exchanger 40 such that the turbo

fan 30 is surrounded by the heat exchanger 40 on three

sides. Alternatively, the casing main body 1 may house

therein the heat exchanger such that the turbo fan 30 is

surrounded by the heat exchanger on two sides.

Specifically, the casing main body 1 may house therein a

heat exchanger corresponding to the heat exchanger 40 from

which the second heat exchange part 42 or the third heat

exchange part 43 is removed, that is, a heat exchanger

having an L shape in plan view. In this case, for example,

the heat exchanger may be located between the turbo fan 30

and the first wall 11 and third wall 13 of the casing main

body 1. Alternatively, the heat exchanger may be located

between the turbo fan 30 and the first wall 11 and fourth

wall 14 of the casing main body 1.

[0068]

The foregoing description concerns specific

embodiments of the present invention; however, the present

invention is not limited to the foregoing embodiment, and

various modifications and variations may be made within the

scope of the present invention. For example, an

appropriate combination of the configurations described in

the foregoing embodiment may be regarded as an embodiment

of the present invention.

REFERENCE SIGNS LIST

[0069]

1 casing main body

la suction port

2 panel

3 grille

4 filter

5, 6 pipe connection part

7 drain socket

8 electrical component

10 blow-out port

11 first wall

12 second wall

13 third wall

14 fourth wall

20 flap

20a flap main body

20b first auxiliary flap

20c second auxiliary flap

21 pivot axis

30 turbo fan

31 motor

32 bell mouth

40 heat exchanger

41 first heat exchange part

42 second heat exchange part

43 third heat exchange part

50 partition plate

50a partition plate main body

50b flange

60 drain pan

70 drain pump

80 stepping motor

90 link mechanism

Claims

1. An indoor unit for an air conditioner, comprising: a casing; a centrifugal fan disposed in the casing; a heat exchanger disposed in the casing such that the centrifugal fan is surrounded by the heat exchanger on two or three sides; and a partition with which the centrifugal fan is surrounded in conjunction with the heat exchanger, the partition being connected to a first end of the heat exchanger and a second end of the heat exchanger and configured to guide air blown out by the centrifugal fan from the first end of the heat exchanger to the second end of the heat exchanger, wherein: a distance between the centrifugal fan and the partition at a position near the second end of the heat exchanger is longer than that at a position near the first end of the heat exchanger, a part having the second end of the heat exchanger extends beyond the first end of the heat exchanger toward a wall of the casing, and the air from the centrifugal fan is blown out through a blow-out port located on a side opposite from the partition with respect to the centrifugal fan.

2. The indoor unit for an air conditioner according to claim 1, wherein the distance between the centrifugal fan and the partition gradually increases from the first end of the heat exchanger toward the second end of the heat exchanger.

Fig.1 103 1 1/9

102

20