AU2022271507A1 - Indoor unit - Google Patents

Abstract

OF THE DISCLOSURE An indoor unit of the present disclosure includes a casing having arm accommodation portions recessed backward from a front surface, arms each having arm main body inserted to the arm accommodation portion from the front and shaft portion protruding in a width direction from back end of the arm main body, and an inlet panel which is fixed to front ends of the arm main bodies and covering the front surface of the casing. The arm accommodation portions each have upper and lower guide portions configured to guide the shaft portion backward through an opening of the arm accommodation portion in a manner of being sandwiched therebetween from above and below, a bearing portion that is provided on a back end side thereof and is able to hold the shaft portion to be rotatable about an axis extending in the width direction, and a stepped portion that is provided between the upper guide portion and the bearing portion and has a stepped surface directed to a backward side. The arms each further have a stopper that abuts the stepped surface so as to restrict turning of the shaft portion when the shaft portion turns in a state in which the shaft portion is positioned in front of the bearing portion. 1/10 -- r -- -- -- - C> LI~0Jl ~C> -' 0 Iflh1it' ~~cj ---- ----------- -------c 00 C ) 00 00 cO co 'Im Q:

Description

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Q: INDOOR UNIT BACKGROUND OF THE INVENTION

[0001] This application claims priority from Japanese Patent Application 2021-189843 filed on 24 November 2021, the contents of which are to be taken as incorporated herein by this reference.

Field of the Invention

[0002] The present disclosure relates to an indoor unit.

Description of Related Art

[0003] The discussion of the background to the invention herein is intended to facilitate an understanding of the invention. However, it should be appreciated that the discussion is not an acknowledgement or admission that any aspect of the discussion was part of the common general knowledge as at the priority date of the application.

[0004] For example, Japanese Unexamined Patent Application, First Publication No.

H8-159508 discloses an indoor unit in which turning arms (arms) connected to a suction

grill (inlet panel) can be attached and detached with respect to a front surface-side panel

(casing) of the indoor unit. The inlet panel is connected one ends of the arms of this

indoor unit, and shafts formed in the casing are fitted into holes formed on the other end

side of the arms via first cutouts.

SUMMARY OF THE INVENTION

[0005] Incidentally, during maintenance or the like of an indoor unit, fitting between

arms and shafts may be disengaged due to opening and closing of an inlet panel. At this

time, the inlet panel may be closed in a state in which fitting between the arms and the

shafts is disengaged. As a result, the inlet panel connected to the arms may come off from a casing together with the arms.

[0006] The present disclosure has been made in order to resolve the foregoing

problems, and it is therefore desirable to provide an indoor unit in which coming-off of

an inlet panel from a casing can be curbed.

[0007] In order to resolve the foregoing problems, an indoor unit according to the

present disclosure includes a casing having a front surface and arm accommodation

portions recessed backward from the front surface, arms each having arm main body

inserted to the arm accommodation portion from the front and shaft portion protruding in

a width direction of the casing from back end of the arm main body, and an inlet panel

is fixed to front ends of the arm main bodies and covering the front surface of the casing.

The arm accommodation portions each have an upper guide portion and a lower guide

portion configured to guide the shaft portion backward through an opening of the arm

accommodation portion in a manner of being sandwiched therebetween from above and

below, a bearing portion that is provided on a back end side of the upper guide portion

and the lower guide portion and has a bearing surface having a recessed curved surface

shape capable of holding the shaft portion to be rotatable about an axis extending in the

width direction of the casing, and a stepped portion that is provided between the upper

guide portion and the bearing portion and has a stepped surface directed to a backward

side. The arms each further have a stopper that abuts the stepped surface so as to

restrict turning of the shaft portion when the shaft portion turns in a state in which the

shaft portion is positioned in front of the bearing portion.

[0008] According to the present disclosure, it is possible to provide an indoor unit in

which coming-off of an inlet panel from a casing can be curbed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a perspective view illustrating a schematic constitution of an indoor

unit according to an embodiment of the present disclosure.

FIG. 2 is a view illustrating a situation when an arm accommodation portion

according to the embodiment of the present disclosure is viewed from a forward side.

FIG. 3 is a partial cross-sectional view in a direction along line III-III in FIG. 2.

FIG. 4 is a view illustrating an arm holder according to the embodiment of the

present disclosure.

FIG. 5 is a view illustrating an arm according to the embodiment of the present

disclosure.

FIG. 6 is a view illustrating a state in which the arm according to the

embodiment of the present disclosure is positioned at a closed position.

FIG. 7 is a view illustrating a state in which the arm according to the

embodiment of the present disclosure is positioned at an open position.

FIG. 8 is a view illustrating a state in which a shaft portion according to the

embodiment of the present disclosure is sandwiched between a connection surface and a

protrusion surface in a narrow portion from the forward side.

FIG. 9 is a view illustrating a state when a bending portion is bent toward the

downward side due to a stopper according to the embodiment of the present disclosure.

FIG. 10 is a view illustrating a situation of involvement between the shaft

portion and a protrusion portion when the arm comes out forward from the arm

accommodation portion in a state in which the arm according to the embodiment of the

present disclosure is positioned at the open position.

DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an indoor unit according to an embodiment of the present disclosure

will be described based on the drawings.

[0011] (Indoorunit)

An indoor unit is an apparatus which is provided indoors and performs indoor

air conditioning through heat exchange between a refrigerant dealing with an outdoor

unit provided outdoors and indoor air. An air conditioning apparatus is constituted of

an indoor unit and an outdoor unit.

[0012] As illustrated in FIG. 1, an indoor unit 100 includes a casing 1, a fan 2, a heat

exchanger 3, a filter part 4, a control unit 5, a bolt 7, an arm 8, and an inlet panel 9.

[0013] (Casing)

The casing 1 is constituted of a plurality of panels and installed on an indoor

wallsurfaceW. The casing 1 forms an outer shell of the indoor unit 100. Thecasing1

accommodates various equipment and defines a space for circulating indoor air on an

inner side. The casing 1 has a back surface panel 10, a bottom panel 20, a top surface

panel 30, a pair of side surface panels 40, a front panel 50, a connection panel 70, and a

flap 73.

[0014] The back surface panel 10 is a panel fixed to the indoor wall surface W with a

mounting plate or the like (not illustrated) therebetween. The back surface panel 10 has

a back surface 11 spreading along the wall surface W and facing the wall surface W. In

the present embodiment, a direction in which the back surface 11 of the back surface

panel 10 and the wall surface W face each other will be referred to as "an installation

direction Di". Therefore, the installation direction Di is a direction perpendicular to the

wall surface W.

[0015] One side, of both sides in the installation direction Di, in a direction away from

the wall surface W will be referred to as "a foreside Dif", and a side opposite thereto will

be referred to as "a backside Dib". The back surface 11 has an oblong shape having a

direction parallel to the wall surface W, of a horizontal direction when viewed from the

foreside Dif (front), as a longitudinal direction.

[0016] The bottom panel 20 is connected to a lower edge of the back surface panel 10

and spreading in a direction intersecting the wall surface W. The bottom panel 20

according to the present embodiment spreads in the horizontal direction and is integrally

connected to the back surface panel 10 in a manner of standing upright from the back

surface panel 10. The bottom panel 20 has a bottom surface 21 spreading in the

horizontal direction and facing below. The bottom surface 21 spreads in a direction

perpendicular to a spreading direction of the back surface 11.

[0017] The top surface panel 30 is a panel connected to an upper edge that is aside

opposite to the lower edge of the back surface panel 10 and spreading in a direction

intersecting the wall surface W. The top surface panel 30 according to the present

embodiment spreads in the horizontal direction and is integrally connected to the back

surface panel 10 in a manner of standing upright from the back surface panel 10.

[0018] That is, the top surface panel 30 spreads parallel to a spreading direction of the

bottom panel 20 on the upward side of the bottom panel 20. The bottom panel 20 and

the top surface panel 30 face each other at positions separated from each other.

[0019] The top surface panel 30 has a head step 31 spreading in the horizontal direction

and directed to the upward side. The head step 31 spreads in a direction perpendicular

to the spreading direction of the back surface 11. In the present embodiment, an end

edge (side) on the head step 31 on the foreside Dif becomes a top edge la of the casing 1.

The top edge la is positioned on the furthest upward side in the casing 1.

[0020] In the present embodiment, a direction in which the bottom panel 20 and the top

surface panel 30 face each other will be referred to as "a vertical direction Dv". One

side, of both sides in the vertical direction Dv, in a direction directed to the top surface

panel 30 from the bottom panel 20 will be simply referred to as "an upside Dvu", and the

other side Dwl on a side opposite thereto will be simply referred to as "a downside Dvd".

Therefore, the vertical direction Dv matches with the direction of gravity.

[0021] The bottom surface 21 of the bottom panel 20 according to the present

embodiment has an oblong shape having a direction parallel to the wall surface W, of the

horizontal direction when viewed from the downside Dvd (below), as the longitudinal

direction. The head dtep 31 of the top surface panel 30 according to the present

embodiment has an oblong shape having a direction parallel to the wall surface W, of the

horizontal direction when viewed from the upside Dvu (above), as the longitudinal

direction.

[0022] A plurality of suctioning ports 32 for suctioning indoor air are formed in the top

surface panel 30. That is, the top surface panel 30 has the plurality of suctioning ports

32. The plurality of suctioning ports 32 are arranged at equal intervals in the horizontal

direction. Each of the suctioning ports 32 penetrates the top surface panel 30 in the

vertical direction Dv. Each of the suctioning ports 32 has a rectangular shape (oblong

shape) when viewed from the upside Dvu.

[0023] The side surface panels 40 is a panel connecting the end edges of the back

surface panel 10, the bottom panel 20, and the top surface panel 30 extending in the

longitudinal direction to each other. In the present embodiment, a direction that

matches with this longitudinal direction will be referred to as "a width direction Dw".

Therefore, the width direction Dw is a direction perpendicular to both the installation

direction Di and the vertical direction Dv.

[0024] The right side, of both sides in the width direction Dw, when the back surface

panel 10 is viewed from the foreside Dif such that the top surface panel 30, the back

surface panel 10, and the bottom panel 20 are arranged from the upside Dvu will be

simply referred to as "one side Dwr", and a side opposite thereto will be simply referred

to as "the other side Dwl".

[0025] One side surface panel 40 of the pair of side surface panels 40 has a side surface

41 connecting the end edges of the back surface panel 10, the bottom panel 20, and the

top surface panel 30 on the one side Dwr to each other and directed to the one side Dwr.

[0026] The other side surface panel 40 of the pair of side surface panels 40 has another

side surface 41 connecting the end edges of the back surface panel 10, the bottom panel

20, and the top surface panel 30 on the other side Dwl to each other and directed to the

other side Dwl.

[0027] Therefore, the pair of side surface panels 40 are disposed such that the back

surface panel 10, the bottom panel 20, and the top surface panel 30 are sandwiched

therebetween in the width direction Dw. Each of the side surfaces 41 spreads in a

direction perpendicular to any of the directions in which the back surface 11, the bottom

surface 21, and the head step 31 respectively spread.

[0028] The front panel 50 is disposed on the foreside Dif of the back surface panel 10

and connects the end edges of the top surface panel 30 and the pair of side surface panels

40 on the foreside Dif to each other. The front panel 50 spreads parallel to a spreading

direction of the back surface panel 10. The front panel 50 has a front surface 51

spreading in a direction along the wall surface W and directed to the foreside Dif.

[0029] A pair of main openings 53 and a pair of arm accommodation portions 52 are

formed in the front panel 50. That is, the front panel 50 has the pair of main openings

53 and the pair of arm accommodation portions 52. The pair of main openings 53 are disposed in a manner of being adjacent to each other in the width direction Dw. Eachof the main openings 53 when viewed from the foreside Dif has an oblong shape having the width direction Dw as the longitudinal direction.

[0030] The pair of arm accommodation portions 52 are arranged in the width direction

Dw. One arm accommodation portion 52 of the pair of arm accommodation portions 52

is disposed on the one side Dwr of the main opening 53, of the pair of main openings 53

adjacent to each other in the width direction Dw, disposed on the one side Dwr.

[0031] The other arm accommodation portion 52 of the pair of arm accommodation

portions 52 is disposed on the other side Dwl of the main opening 53, of the pair of main

openings 53 adjacent to each other in the width direction Dw, disposed on the other side

Dwl. The detailed constitution of the arm accommodation portions 52 will be described

below.

[0032] The connection panel 70 is a panel disposed on the downside Dvd of the front

panel 50 and connecting the end edges of the bottom panel 20 and the pair of side surface

panels 40 on the foreside Dif and the end edge of the front panel 50 on the downside Dvd

to each other.

[0033] The connection panel 70 has a curved surface 71 having a curved surface shape

directed to the foreside Dif as it goes toward the end edge of the front panel 50 on the

downside Dvd from the end edge of the bottom panel 20 on the foreside Dif.

[0034] A discharge port 72 for discharging air which has been suctioned through the

suctioning ports 32 of the top surface panel 30 is formed in the connection panel 70.

That is, the connection panel 70 has the discharge port 72. The discharge port 72 when

viewed from the foreside Dif or the downside Dvd is formed to have a rectangular shape

(oblong shape) having the width direction Dw as the longitudinal direction. The

discharge port 72 according to the present embodiment spreads along the curve of the curved surface 71.

[0035] The flap 73 is provided in the discharge port 72 of the connection panel 70 and

changes a direction of air discharged through the discharge port 72. The flap 73 can

shift between a state of covering the discharge port 72 from the foreside Dif and a state of

not covering the discharge port 72.

[0036] For example, the flap 73 is provided in the connection panel 70 and supported

by a turning shaft (not illustrated) about a turning axis (not illustrated) extending in the

width direction Dw in a manner of being able to turn around the turning axis. For

example, a turning amount of the flap 73 is controlled on the basis of an input signal

input from the outside.

[0037] As described above, a space for accommodating various equipment and

circulating indoor air is formed by each of the elements constituting the casing 1. For

the sake of convenience of description, in the present embodiment, this space will be

referred to as "an accommodation space R".

[0038] (Fan)

The fan 2 is a cross-flow fan which can introduce indoor air into the casing 1.

The fan 2 extends in the width direction Dw inside the accommodation space R. The

fan 2 is held by the back surface panel 10 about a rotation shaft (not illustrated)

extending in the width direction Dw in a manner of being able to rotate around the

rotation shaft.

[0039] The fan 2 rotates inside the accommodation space R so as to suction air through

the suctioning ports 32 of the top surface panel 30 and discharge suctioned air through

the discharge port 72 of the connection panel 70. For example, a rotation frequency of

the fan 2 is controlled on the basis of an input signal input from the outside.

[0040] (Heat exchanger)

The heat exchanger 3 performs heat exchange between air introduced into the

accommodation space R by the fan 2 and a refrigerant. That is, the heat exchanger 3

cools or warms air introduced into the accommodation space R. The heat exchanger 3

is constituted of a heat transfer pipe in which the refrigerant circulates, a plurality of fins

through which this heat transfer pipe is inserted in the width direction Dw, and the like.

For example, the heat exchanger 3 is provided in a manner of surrounding the fan 2 from

the upside Dvu inside the accommodation space R.

[0041] (Filter part)

The filter part 4 filters impurities such as dust included in air suctioned through

the suctioning ports 32 of the top surface panel 30. The filter part 4 is disposed on the

upside Dvu of the heat exchanger 3 inside the accommodation space R. That is, the

filter part 4 is disposed between the casing 1 and the heat exchanger 3. Therefore, the

filter portion 4 supplies air from which impurities such as dust have been eliminated to

the heat exchanger 3.

[0042] (Control unit)

The control unit 5 is a device for controlling the turning amount of the flap 73,

rotation of the fan 2, and the like. The control unit 5 is connected to the flap 73 and the

fan 2 by wire or radio. The control unit 5 is provided inside the accommodation space

R and disposed on the one side Dwr of the fan 2, the heat exchanger 3, and the filter part

4.

[0043] For example, when the indoor unit 100 includes a sensor (not illustrated)

provided in the casing 1, the control unit 5 generates an input signal on the basis of

detected information acquired by the sensor. The control unit 5 transmits a generated

input signal to the flap 73 or the fan 2.

[0044] Here, a constitution of the pair of arm accommodation portions 52 provided in

the front panel 50 will be described. When the front panel 50 is viewed from the

foreside Dif, the pair of arm accommodation portions 52 are disposed with a relationship

of bilateral symmetry therebetween.

[0045] Hereinafter, the arm accommodation portion 52, of the pair of arm

accommodation portions 52 provided in the front panel 50, disposed on the one side Dwr

will be described. Description of the arm accommodation portion 52 disposed on the

other side will be omitted.

[0046] (Arm accommodation portion)

The arm accommodation portion 52 is a recessed part opening on the front

surface 51 of the front panel 50 and recessed toward the upside Dvu as it goes toward the

backside Dib. As illustrated in FIGS. 2 to 4, the arm accommodation portion 52 has a

holder support portion 520, a first engagement portion 521, a side wall portion 524, and

an arm holder 6.

[0047] The arm accommodation portion 52 includes an opening 50a on the front surface

51. The opening 50a according to the present embodiment has a rectangular shape

(oblong shape) when viewed from the foreside Dif. The longitudinal direction of the

opening 50a matches with the vertical direction Dv.

[0048] (Holder support portion)

The holder support portion 520 extends to the upside Dvu as it goes toward the

backside Dib from the end edge of the opening 50a on the downside Dvd. The holder

support portion 520 has a base end surface 520a, a fastening surface 520b, an upper

surface 520c, and a support surface 520d. The base end surface 520a is a surface

connected to the end edge of the opening 50a on the front surface 51 on the downside

Dvd and inclined in a manner of being directed to the upside Dvu with respect to the front surface 51.

[0049] The fastening surface 520b is a surface connected to the end edge on the base

end surface 520a on the backside Dib and spreading in a manner of rising toward the

upside Dvu from the end edge. Therefore, the fastening surface 520b is directed to the

foreside Dif.

[0050] A fastening hole 520e opening on the fastening surface 520b and recessed

toward the backside Dib from this fastening surface 520b is formed in the holder support

portion 520. The fastening hole 520e has a screw thread allowing the bolt 7 to be

fastened thereto.

[0051] The upper surface 520c is a surface connected to the end edge on the fastening

surface 520b on the upside Dvu and spreads in the horizontal direction from the end

edge. The support surface 520d is a surface connected to the end edge on the upper

surface 520c on the backside Dib and inclined in a manner of being directed to the

foreside Dif with respect to the upper surface 520c. The support surface 520d according

to the present embodiment is formed to be inclined, for example by 400 to 50°, with

respect to a virtual horizontal plane (spreading direction of the upper surface 520c).

[0052] (First engagement portion)

The first engagement portion 521 extends toward the upside Dvu from the end

edge of the holder support portion 520 on the backside Dib. The first engagement

portion 521 according to the present embodiment is formed of a material having

flexibility. The first engagement portion 521 has a first base portion 522 and a first

claw portion 523. The first base portion 522 is a member having a flat plate shape

extending upward from the end edge of the holder support portion 520 on the backside

Dib.

[0053] Therefore, the first base portion 522 extends in a direction intersecting a

spreading direction of the support surface 520d above the support surface 520d. The

first base portion 522 has a forward surface 522a connected to the end edge on the

support surface 520d on the backside Dib and spreading in a manner of rising toward the

upside Dvu from the end edge. The forward surface 522a is directed to the foreside Dif

and connected to the support surface 520d.

[0054] The first claw portion 523 is a member having a flat plate shape extending to the

foreside Dif as it goes toward the upside Dvu from the end edge of the first base portion

522 on the upside Dvu. Therefore, the first claw portion 523 extends in a direction

intersecting the spreading direction of the support surface 520d above the support surface

520d.

[0055] The first claw portion 523 according to the present embodiment has a first

surface 523a spreading in a direction perpendicular to the spreading direction of the

support surface 520d and connected to the forward surface 522a, and a restraint surface

523b directed to a side opposite to the first surface 523a.

[0056] (Side wall portion)

The side wall portion 524 spreads in a manner of connecting the end edge of the

opening 50a on the other side Dwl, the holder support portion 520, and the first

engagement portion 521 to each other. The side wall portion 524 according to the

present embodiment is formed of a material having flexibility.

[0057] The side wall portion 524 has a side wall surface 524a spreading in a direction

perpendicular to the width direction Dw and directed to the one side Dwr on the other

side Dwl of the holder support portion 520 and the first engagement portion 521.

[0058] (Arm holder)

The arm holder 6 is a member inserted through the opening 50a from the front surface 51 side and integrated with the holder support portion 520 by being fixed to the holder support portion 520 in an attachable/detachable manner. As illustrated in FIGS.

1 and 4, the arm holder 6 has a holder main body 60, a second engagement portion 61,

and a fixed portion 62.

[0059] (Holder main body)

The holder main body 60 is a member placed on the support surface 520d when

it is inserted into the arm accommodation portion 52. The holder main body 60

corresponds to a main body part in the arm holder 6. Here, a direction in which the

holder main body 60 is inserted into the arm accommodation portion 52 will be referred

to as "an insertion direction Ds".

[0060] The insertion direction Ds is a direction that matches with a direction in which

the holder support portion 520 extends. One side, of both sides in the insertion

direction Ds, in a direction away from the front surface 51 will be referred to as "a

backward side Dsb", and a side opposite thereto (direction approaching the front surface

51) will be referred to as "a forward side Dsf'.

[0061] The holder main body 60 has a first holder surface 600a directed to the one side

Dwr, a second holder surface 600b directed to the other side Dwl that is a side opposite to

the first holder surface 600a, and a third holder surface 600c connecting the first holder

surface 600a and the second holder surface 600b to each other and directed to the

forward side Dsf. When the holder main body 60 is inserted into the arm

accommodation portion 52, the second holder surface 600b faces the side wall surface

524a of the side wall portion 524 and comes into contact therewith.

[0062] Hereinafter, a constitution of each of the elements (the holder main body 60, the

second engagement portion 61, and the fixed portion 62) provided in the arm holder 6

when the holder main body 60 is placed on the support surface 520d of the holder support portion 520 will be described.

[0063] The holder main body 60 has a lower guide portion 602, a bearing portion 603,

an upper guide portion 601, a stepped portion 604, and a connection portion 605. The

lower guide portion 602 is a flat-plate member placed on the support surface 520d. The

lower guide portion 602 spreads in a direction perpendicular to the width direction Dw.

The lower guide portion 602 has a main body portion 600, a bending portion 620, and a

protrusion portion 621.

[0064] The main body portion 600 is a member having a plate shape spreading the

installation direction Di and the vertical direction Dv. The main body portion 600 has a

placement surface 602a facing the support surface 520d and placed on the support

surface 520d, a lower guide surface 602b (guide surface) directed to a side opposite to

the placement surface 602a and extending in a direction away from the opening 50a, and

an upper end surface 602c directed to the upside Dvu on the backside Dib of the lower

guide surface 602b.

[0065] The bending portion 620 extends from the main body portion 600 in a manner of

being directed to the backside Dib as it goes to the upside Dvu between the lower guide

surface 602b and the upper end surface 602c of the main body portion 600 in the

installation direction Di. A measurement of the bending portion 620 in the width

direction Dw is the same as a measurement of the main body portion 600 in the width

direction Dw. The bending portion 620 according to the present embodiment is formed

of a material having flexibility.

[0066] The bending portion 620 has a first bending surface 620a having a curved

surface shape directed to the upside Dvu, a second bending surface 620b connected to the

first bending surface 620a and directed to the backside Dib, and a third bending surface

620c having a curved surface shape connected to the second bending surface 620b and directed to the downside Dvd.

[0067] The first bending surface 620a is connected to the lower guide surface 602b of

the main body portion 600 from the backward side Dsb. The second bending surface

620b is a flat surface connecting the end edge on the first bending surface 620a on the

backside Dib and the end edge on the third bending surface 620c on the backside Dib to

each other in the vertical direction Dv. The third bending surface 620c is connected to

the second bending surface 620b from the foreside Dif and formed along the first

bending surface 620a. A gap S is formed between the third bending surface 620c and

the upper end surface 602c of the main body portion 600 in the vertical direction Dv.

[0068] The protrusion portion 621 has a protrusion surface 621a having a projecting

surface shape protruding toward the upside Dvu from the first bending surface 620a of

the bending portion 620 so as to protrude toward the upside Dvu. The protrusion

surface 621a has an apex portion positioned at the top on the upside Dvu when viewed

from the one side Dwr.

[0069] The protrusion portion 621 integrally protrudes toward the upside Dvu with the

bending portion 620 from the first bending surface 620a of the bending portion 620 on

the other side Dwl when the bending portion 620 is bisected in the width direction Dw.

Therefore, when viewed from the one side Dwr, the protrusion surface 621a and the first

bending surface 620a have different heights.

[0070] The bearing portion 603 is integrally connected to the upper end surface 602c of

the main body portion 600 in the lower guide portion 602 from the upside Dvu. The

bearing portion 603 is a member having a plate shape spreading in the installation

direction Di and the vertical direction Dv. A measurement of the bearing portion 603 in

the width direction Dw is the same as the measurement of the main body portion 600 in

the width direction Dw.

[0071] The bearing portion 603 has a front end surface 603a connected to the upper end

surface 602c of the main body portion 600 from the upside Dvu and directed to the

foreside Dif, a bearing surface 603b connected to the end edge on the front end surface

603a on the upside Dvu from the upside Dvu and recessed toward the backside Dib from

this front end surface 603a, and a lower end surface 603c connected to the end edge on

the bearing surface 603b on the upside Dvu from the foreside Dif and directed to the

downside Dvd.

[0072] The front end surface 603a and the lower end surface 603c each have a flat

surface shape. The bearing surface 603b has a recessed curved surface shape.

Specifically, the bearing surface 603b is an inner circumferential surface of a half

cylinder recessed toward the backside Dib when viewed from the one side Dwr. The

bearing surface 603b is positioned on the upside Dvu of the opening 50a.

Measurements of the front end surface 603a, the bearing surface 603b, and the lower end

surface 603c in the width direction Dw are the same as a measurement of the upper end

surface 602c in the width direction Dw.

[0073] Here, respective surfaces of the main body portion 600 and the bending portion

620 of the lower guide portion 602, and the bearing portion 603 directed to the one side

Dwr are connected to each other, thereby constituting the foregoing first holder surface

600a in the holder main body 60.

[0074] The upper guide portion 601 is disposed on the upside Dvu of the lower guide

portion 602 and the foreside Dif of the bearing portion 603. The upper guide portion

601 has an upper guide surface 601a extending in a direction away from the opening 50a

and facing the lower guide surface 602b. A measurement of the upper guide portion

601 in the width direction Dw is larger than the measurements of the lower guide portion

602 and the bearing portion 603 in the width direction Dw. A measurement of the upper guide surface 601a in the width direction Dw is larger than those of the lower guide surface 602b, the upper end surface 602c, the bearing surface 603b, and the lower end surface 603c.

[0075] The stepped portion 604 is provided between the bearing portion 603 and the

upper guide portion 601 and connects the bearing portion 603 and the upper guide

portion 601 to each other in the installation direction Di. The stepped portion 604

according to the present embodiment has a stepped surface 604a directed to the backside

Dib, and a connection surface 604b connected to the stepped surface 604a and directed to

the downside Dvd.

[0076] The stepped surface 604a spreads in a manner of rising toward the one side Dwr

from the end edge of the first holder surface 600a of the bearing portion 603 on the

foreside Dif. The connection surface 604b has a flat surface shape spreading in a

direction perpendicular to the stepped surface 604a and connects the lower end surface

603c of the bearing portion 603 and the upper guide surface 601a of the upper guide

portion 601 to each other.

[0077] Here, a measurement of the connection surface 604b in the width direction Dw

is the same as the measurement of the upper guide surface 601a in the width direction

Dw. A difference between the measurement of the connection surface 604b in the width

direction Dw and a measurement of the lower end surface 603c of the bearing portion

603 in the width direction Dw is equivalent to a measurement of the stepped portion 604

in the width direction Dw.

[0078] The connection portion 605 is a member having a plate shape connecting the

lower guide portion 602, the bearing portion 603, the upper guide portion 601, and the

stepped portion 604 to each other and spreading in the installation direction Di and the

vertical direction Dv. The connection portion 605 has an abutment surface 605a connecting the lower guide surface 602b of the main body portion 600 in the lower guide portion 602, the bearing surface 603b and the lower end surface 603c of the bearing portion 603, the upper guide surface 601a of the upper guide portion 601, and the connection surface 604b of the stepped portion 604 to each other and directed to the one side Dwr on the other side Dwl of the lower guide surface 602b, the bearing surface

603b, the lower end surface 603c, the upper guide surface 601a, and the connection

surface 604b.

[0079] The abutment surface 605a according to the present embodiment is not

connected to the first bending surface 620a, the second bending surface 620b, and the

third bending surface 620c of the bending portion 620; the protrusion surface 621a of the

protrusion portion 621; the upper end surface 602c of the main body portion 600; and the

front end surface 603a of the bearing portion 603.

[0080] Therefore, in the bending portion 620, a part connected to the main body portion

600 becomes a fixed end, and a tip extending from the main body portion 600 becomes a

free end. The end edge on the abutment surface 605a on the forward side Dsf connects

the end edge on the lower guide surface 602b on the forward side Dsf and the end edge

on the upper guide surface 601a on the forward side Dsf to each other in the vertical

direction Dv.

[0081] Here, respective surfaces of the main body portion 600 and the bending portion

620 of the lower guide portion 602, the bearing portion 603, the upper guide portion 601,

and the connection portion 605 directed to the other side Dwl are connected to each

other, thereby constituting the foregoing second holder surface 600b. In addition,

respective surfaces of the lower guide portion 602, the upper guide portion 601, and the

connection portion 605 directed to the foreside Dif are connected to each other, thereby

constituting the foregoing third holder surface 600c.

[0082] In the present embodiment, an arm insertion portion 606 having a groove shape

recessed toward the other side Dwl from the first holder surface 600a in the holder main

body 60 and opening on the third holder surface 600c is constituted of the lower guide

surface 602b of the lower guide portion 602, the bearing surface 603b and the lower end

surface 603c of the bearing portion 603, the upper guide surface 601a of the upper guide

portion 601, the connection surface 604b of the fixed portion 62, and the abutment

surface 605a of the connection portion 605.

[0083] (Second engagement portion)

The second engagement portion 61 is a member integrally formed on the main

body portion 600 of the holder main body portion 60 so as to be protruded therefrom to

the backward side Dsb from the main body portion 600 and able to be interlocked with

the first engagement portion 521. The second engagement portion 61 has a second base

portion 610 and a second claw portion 611.

[0084] The second base portion 610 is a member having a flat plate shape extending

toward the backward side Dsb from the main body portion 600 of the lower guide portion

602. The second base portion 610 has a facing surface 610a facing the support surface

520d. The facing surface 610a spreads parallel to the spreading direction of the support

surface 520d.

[0085] The second claw portion 611 is a member having a flat plate shape extending to

the backside Dib as it goes toward the downside Dvd from the end edge of the second

base portion 610 on the backward side Dsb. The second claw portion 611 according to

the present embodiment has a reception surface 611b spreading in a direction

perpendicular to a spreading direction of the facing surface 610a and connected to the

facing surface 610a, and a second surface 611a directed to a side opposite to the

reception surface 61lb.

[0086] Therefore, the reception surface 611b and the second surface 611aof the second

claw portion 611 spread parallel to spreading directions of the first surface 523a and the

restraint surface 523b of the first claw portion 523 in the first engagement portion 521.

The reception surface 611b and the second surface 611a of the second claw portion 611

are disposed at positions overlapping the first surface 523a and the restraint surface 523b

when viewed in the insertion direction Ds.

[0087] Here, a form related to involvement between the first engagement portion 521

and the second engagement portion 61 when the holder main body 60 is inserted into the

arm accommodation portion 52 will be described. When the holder main body 60 is

inserted toward the backward side Dsb in the arm accommodation portion 52, the second

surface 611a of the second claw portion 611 comes into contact with the first surface

523a of the first claw portion 523.

[0088] When the holder main body 60 is further inserted toward the backward side Dsb

from a position where the first surface 523a and the second surface 611a come into

contact with each other, the first surface 523a of the first claw portion 523 receives a

pressure from the second surface 611aof the second claw portion 611. Atthistime,

since the first engagement portion 521 has flexibility, the first claw portion 523 and the

first base portion 522 connected to the first claw portion 523 are bent toward the

backward side Dsb.

[0089] Due to bending of the first claw portion 523 and the first base portion 522

toward the backward side Dsb, the second surface 611a of the second claw portion 611

can go over the end edge on the first surface 523a of the first claw portion 523 and moves

to the backward side Dsb beyond the restraint surface 523b of the first claw portion 523.

That is, the second claw portion 611 goes over the first claw portion 523 from the

forward side Dsf toward the backward side Dsb.

[0090] Since the first engagement portion 521 has flexibility, at the same time as the

second claw portion 611 goes over the first claw portion 523, bending of the first claw

portion 523 and the first base portion 522 toward the backward side Dsb is released, and

the first claw portion 523 and the first base portion 522 return to original positions.

[0091] When the first claw portion 523 and the first base portion 522 return to the

original positions and insertion of the holder main body 60 to the backward side Dsb

ends, the restraint surface 523b of the first claw portion 523 and the reception surface

61lb of the second claw portion 611 face each other in the insertion direction Ds and

come into contact with each other (the state in FIG. 4).

[0092] At this time, due to a dead weight of the holder main body 60, a tensile force is

applied to the second engagement portion 61 (the second claw portion 611 and the

second base portion 610) toward the forward side Dsf, but the reception surface 611b of

the second claw portion 611 is pressed by the restraint surface 523b of the first claw

portion 523 so as to receive a force toward the backward side Dsb from this restraint

surface 523b.

[0093] Due to a balance between a force applied to the restraint surface 523b from the

reception surface 611b on the basis of the dead weight of the holder main body 60 and a

force applied to the reception surface 611b from the restraint surface 523b on the basis of

a material constituting the first engagement portion 521 having flexibility, the main body

portion 600 stands still on the support surface 520d. Through a series of the foregoing

operation, engagement between the first engagement portion 521 and the second

engagement portion 61 is completed.

[0094] (Fixed portion)

The fixed portion 62 is a member integrally formed on the main body portion

600 of the lower guide portion 602 in the holder main body 60 so as to be protruded from the main body portion 600 and fixed to the holder support portion 520. The fixed portion 62 itself is fixed to the holder support portion 520 so that the main body portion

600 is subjected to positioning on the support surface 520d.

[0095] The fixed portion 62 has a fixed surface 62a extending from the main body

portion 600 toward the forward side Dsf and being flush with the front surface 51 on the

inner side of the opening 50a. A recessed groove 62b opening on the fixed surface 62a

and recessed toward the backside Dib from this fixed surface 62a is formed in the fixed

portion 62.

[0096] Further, a fixed portion fastening hole 62d opening on a groove bottom surface

62c of this recessed groove 62b and penetrating the fixed portion 62 toward the backside

Dib from this groove bottom surface 62c is formed in the fixed portion 62. The fixed

portion fastening hole 62d has a screw thread allowing the bolt 7 to be fastened thereto.

[0097] That is, the fixed portion 62 according to the present embodiment is subjected to

spot-facing treatment such that a head portion of the bolt 7 does not protrude to the

foreside Dif beyond the fixed surface 62a. This fixed portion fastening hole 62d

provided in the fixed portion 62 is formed to have the same measurement as the fastening

hole 520e provided in the holder support portion 520 and overlaps this fastening hole

520e in a manner of being connected thereto in the installation direction Di.

[0098] Due to the bolt 7 fastened to the fixed portion fastening hole 62d and the

fastening hole 520e connected to each other from the foreside Dif, the fixed portion 62 is

fixed to the holder support portion 520. That is, the bolt 7 is attached to the holder

support portion 520 from the foreside Dif so that the fixed portion 62 is fixed to the

holder support portion 520. In other words, since the bolt 7 is attached to the casing 1

from the foreside Dif, the arm holder 6 is fixed to the casing 1.

[0099] (Arm)

The arm 8 is inserted into the arm accommodation portion 52 from the front

surface 51 side, and one end thereof is held by the arm insertion portion 606 formed in

the holder main body 60 of the arm holder 6 in a manner of being able to turn around an

axis 0 extending in the width direction Dw. As illustrated in FIGS. 1, 5, and 6, the arm

8 has a shaft portion 81, an arm main body 80, and a stopper 84.

[0100] (Shaftportion)

The shaft portion 81 has a columnar portion 82 having a columnar shape

extending in the width direction Dw about the axis 0, and a D-cut portion 83 integrally

extending from an end surface directed in the axis 0 direction of the columnar portion 82

and having a shape formed by cutting out a part of an outer circumferential surface 81a

having a columnar shape about the axis 0.

[0101] The columnar portion 82 has a first end surface 82a directed to the one side Dwr,

a second end surface 82b directed to the other side Dwl, and a first outer circumferential

surface 82c connecting the first end surface 82a and the second end surface 82b to each

other between these. The first end surface 82a has a perfect circular shape and

corresponds to an end surface 81b of the columnar portion 82 on the one side Dwr. The

second end surface 82b has a D-shape when viewed from the other side Dwl and

corresponds to the end surface 81b of the columnar portion 82 on the other side Dwl.

The first outer circumferential surface 82c corresponds to the outer circumferential

surface 81a of the columnar portion 82 and has a cylindrical surface shape.

[0102] The D-cut portion 83 has a cut surface 83a connected to the second end surface

82b of the columnar portion 82 and spreading in a direction perpendicular to this second

end surface 82b, a third end surface 83b connected to the cut surface 83a and directed to

the other side Dwl, and a second outer circumferential surface 83c connecting the first outer circumferential surface 82c, the cut surface 83a, and the third end surface 83b to each other.

[0103] The cut surface 83a is a flat surface spreading from the second end surface 82b

in a manner of rising toward the one side Dwr. The third end surface 83b has a D-shape

when viewed from the other side Dwl and corresponds to the end surface 81b of the D

cut portion 83 on the other side Dwl.

[0104] When viewed from the other side Dwl, a perfect circle having the same size and

shape as the first end surface 82a is formed by the second end surface 82b and the third

end surface 83b. The second outer circumferential surface 83c corresponds to the outer

circumferential surface 81a of the D-cut portion 83 and has a cylindrical surface shape.

Hereinafter, for the sake of convenience of description, the first outer circumferential

surface 82c and the second outer circumferential surface 83c may be simply referred to

as "an outer circumferential surface 81a" without being distinguished from each other.

[0105] The shaft portion 81 is inserted into the arm accommodation portion 52 from the

front surface 51 side in a state of extending in the width direction Dw and then is inserted

into the arm insertion portion 606 formed in the holder main body 60 of the arm holder 6.

The shaft portion 81 which has been inserted into the arm insertion portion 606 is held by

the bearing surface 603b of the bearing portion 603 in a manner of being able to turn

around the axis 0. The axis 0 when the shaft portion 81 is held by the bearing surface

603b coincides with a centerline of the bearing surface 603b (a centerline of the cylinder)

serving as an inner circumferential surface of the cylinder.

[0106] Here, a form when the shaft portion 81 is inserted into the arm insertion portion

606 will be described. When the shaft portion 81 is inserted between the upper guide

portion 601 and the lower guide portion 602 in the arm insertion portion 606, the outer

circumferential surface 81a of the shaft portion 81 individually comes into contact with the upper guide surface 601a or the lower guide surface 602b. The third end surface

83b of the D-cut portion 83 abuts the abutment surface 605a of the connection portion

605.

[0107] When a force causing the shaft portion 81 to be directed to the upside Dvu or the

backside Dib is applied thereto, the outer circumferential surface 81a comes into sliding

contact with the upper guide surface 601a or the lower guide surface 602b, while the

third end surface 83b of the D-cut portion 83 comes into sliding contact with the

abutment surface 605a, the shaft portion 81 in its entirety is guided in a direction in

which the upper guide surface 601a and the lower guide surface 602b extend, that is, to

the backward side Dsb.

[0108] The outer circumferential surface 81a of the shaft portion 81 which has been

guided to the backward side Dsb approaches a narrow portion N formed between the

protrusion surface 621a and the connection surface 604b from the forward side Dsf and

abuts each of the protrusion surface 621a and the connection surface 604b in this narrow

portion N while coming into sliding contact with the protrusion surface 621a of the

protrusion portion 621 and the connection surface 604b of the stepped portion 604

following the upper guide surface 601a.

[0109] That is, the shaft portion 81 is in a state of being sandwiched between the

protrusion surface 621a and the connection surface 604b in the narrow portion N. The

narrow portion N according to the present embodiment is a region smaller than a

measurement of the shaft portion 81 in a direction orthogonal to the axis 0 in a region

between the protrusion surface 621a and the connection surface 604b.

[0110] Here, when a force causing the shaft portion 81 to be directed to the backside

Dib is further applied thereto, the protrusion surface 621a abutting the shaft portion 81 in

the narrow portion N receives a force from the shaft portion 81 in a normal direction of a tangential line of the protrusion surface 621a. At the same time, a force, of this force received from the shaft portion 81 in the normal direction, having a component in a perpendicular direction toward the downside Dvd acts on the bending portion 620 integrally connected to the protrusion portion 621 with this protrusion portion 621 therebetween. As a result, the bending portion 620 is elastically deformed in a manner of being bent toward the downside Dvd.

[0111] Accordingly, a distance between the protrusion surface 621a and the connection

surface 604b in the narrow portion N becomes larger than the measurement of the shaft

portion 81 in a direction perpendicular to the axis 0 direction, and the shaft portion 81

goes over this apex portion toward the backside Dib in a manner of straddling the apex

portion of the protrusion surface 621a when viewed from the one side Dwr and is guided

to the backside Dib beyond this apex portion.

[0112] The shaft portion 81 which has been guided to the backside Dib beyond the apex

portion of the protrusion surface 621a is held by the bearing surface 603b of the bearing

portion 603 in a manner of being able to turn around the axis 0. At the same time,

elastic deformation of the bending portion 620 is released, and the bending portion 620

returns to the original state.

[0113] (Armmainbody)

The arm main body 80 is a member connected to the shaft portion 81 and

turning about the axis 0 in response to turning of the shaft portion 81. Specifically, one

end of the arm main body 80 is integrally fixed with the columnar portion 82 such that a

part on the first outer circumferential surface 82c of the columnar portion 82 in the shaft

portion 81 is covered from an outer circumferential side. Namely, the arm main body

80 integrally turns around the axis 0 with the shaft portion 81.

[0114] The arm main body 80 is inserted into the arm accommodation portion 52 when

the shaft portion 81 is at a position about the axis 0. The arm main body 80 has a U

shape inclined to the foreside Dif when viewed from the one side Dwr. When the

indoor unit 100 is assembled, the shaft portion 81 is inserted into the arm accommodation

portion 52 together with this arm main body 80 in a state in which the arm main body 80

is fixed. Therefore, the shaft portion 81 and the arm main body 80 are not separately

inserted into the arm accommodation portion 52.

[0115] (Stopper)

The stopper 84 is a member having a plate shape provided in the arm main body

80. The stopper 84 abuts the stepped surface 604a of the stepped portion 604 so as to

restrict turning of the shaft portion 81 when the shaft portion 81 turns in a state in which

the shaft portion 81 is positioned on the foreside Dif of the bearing portion 603.

[0116] (Inletpanel)

The inlet panel 9 is a panel capable of shifting between a state of covering the

front surface 51 of the front panel 50 from the foreside Dif and a state of not covering the

front surface 51 in response to turning of the arms 8 around the axis 0. The inlet panel

9 is connected to the other end of each of the arm main bodies 80. The inlet panel 9

covers the front surface 51 of the front panel 50 from the foreside Dif so as to close the

main openings 53 opening on the front surface 51, and the openings 50a of the arm

accommodation portions 52.

[0117] Here, a form of the inlet panel 9 when the arms 8 turn will be described. As

illustrated in FIG. 6, before the arms 8 turn, the inlet panel 9 connected to the other end

of each of the arms 8 is disposed in a manner of overlapping the front surface 51 of the

front panel 50 at a position covering the openings 50a of the arm accommodation

portions 52.

[0118] On the other hand, as illustrated in FIG. 7, when the arms 8 turn around the axis

0, the inlet panel 9 connected to the other end of each of the arms 8 moves to the

foreside Dif and the upside Dvu from the position covering the openings 50a and shifts to

the position where the front surface 51 is opened. In the present embodiment, the

former position (FIG. 6) will be referred to as "a closed position", and the latter position

(FIG. 7) will be referred to as "an open position".

[0119] In the present embodiment, the end edge of the inlet panel 9 on the upside Dvu

becomes a top edge 9a. As illustrated in FIG. 6, the top edge 9a of the inlet panel 9 is

positioned below the top edge la of the casing 1 when the inlet panel 9 is positioned at

the closed position.

[0120] Here, a form exhibited by the stopper 84 when the shaft portion 81 turns in a

state in which the shaft portion 81 is positioned on the foreside Dif of the bearing portion

603 will be described. When the arm 8 is positioned at the closed position, the stopper

84 protrudes to the upside Dvu from an end portion of the arm main body 80 on the

upside Dvu when viewed from the one side Dwr.

[0121] At this time, the stopper 84 has a stopper surface 84a facing the stepped surface

604a of the stepped portion 604 in the installation direction Di. When the arm 8 is

positioned at the closed position, the stopper 84 according to the present embodiment has

a triangular shape of which one vertex is positioned on the upside Dvu of the arm main

body 80 when viewed from the one side Dwr.

[0122] For example, in a process of opening and closing the inlet panel 9, that is, in a

process in which the arm 8 shifts between the closed position and the open position

during maintenance or the like of the indoor unit 100, a force causing the arm main body

80 to be directed to the foreside Dif (a tensile force to the foreside Dif) may act via the

inlet panel 9. When the arm 8 is at the open position, if a force causing the arm main body 80 to be directed to the foreside Dif acts, the shaft portion 81 integrated with the arm main body 80 is also pulled to the foreside Dif.

[0123] Accordingly, the protrusion surface 621a receives a force from the shaft portion

81 in the normal direction of the tangential line of a part which comes into contact with

the outer circumferential surface 81a of the shaft portion 81. At the same time, a force,

of this force received in the normal direction, having a component in the perpendicular

direction toward the downside Dvd acts on the bending portion 620 integrally connected

to the protrusion portion 621 with this protrusion portion 621 therebetween. As a result,

a thrust force to the downside Dvd acts on the protrusion portion 621 from the shaft

portion 81.

[0124] When a thrust force to the downside Dvd acts on the protrusion portion 621

from the shaft portion 81, the bending portion 620 integrated with the protrusion portion

621 is elastically deformed in a manner of being bent to the downside Dvd. As a result,

for example, as illustrated in FIG. 8, the shaft portion 81 may go over the apex portion of

the protrusion surface 621a in a direction directed to the foreside Dif. Atthistime,the

stopper surface 84a abuts a lower end edge 604e on the stepped surface 604a on the

downside Dvd. Therefore, for example, turning may be restricted by the stopper 84 in a

state in which the shaft portion 81 is positioned between the bending portion 620 and the

stepped portion 604 in the narrow portion N.

[0125] Here, when the arm 8 shifts from the open position to the closed position, a

pressurizing force is applied to the lower end edge 604e on the stepped surface 604a in

the stepped portion 604 in response to counterclockwise turning of the shaft portion 81

when viewed from the one side Dwr. On the other hand, the stopper 84 receives a

reaction force against this pressurizing force from the lower end edge 604e, and a force

having a component in a direction directed in the downside Dvd included in this reaction force acts on the protrusion portion 621 from the shaft portion 81 at the same time as it is transferred to the shaft portion 81 integrated with the arm main body 80 via the arm main body 80 connected to the stopper 84.

[0126] Accordingly, as illustrated in FIG. 9, the bending portion 620 integrated with the

protrusion portion 621 is elastically deformed in a manner of being bent to the downside

Dvd so that the distance between the connection surface 604b and the protrusion surface

621a in the narrow portion N becomes larger than the measurement of the shaft portion

81 in a direction perpendicular to the width direction Dw.

[0127] Asa result of bending of the bending portion 620 to the downside Dvd, as

illustrated in FIG. 6, the shaft portion 81 is guided to the bearing surface 603b of the

bearing portion 603 again. Therefore, for example, when the arm 8 is positioned at the

open position, even if the shaft portion 81 has come off from the bearing portion 603 to

the foreside Dif and has gone over the apex portion toward the foreside Dif in a manner

of straddling this apex portion of the protrusion surface 621a, the shaft portion 81 can be

guided to the bearing portion 603 again by the stopper 84 in the process in which the arm

8 shifts to the closed position. In other words, when the inlet panel 9 is opened, even if

the shaft portion 81 has moved to the foreside Dif of the bearing portion 603, the shaft

portion 81 can be stored in the bearing portion 603 again by closing the inlet panel 9.

[0128] Here, as illustrated in FIG. 10, the cut surface 83a of the D-cut portion 83 faces

the protrusion surface 621a of the protrusion portion 621 when the arm 8 comes out

forward from the arm accommodation portion 52 in a state in which the arm 8 is

positioned at the open position. At this time, the first outer circumferential surface 82c

of the columnar portion 82 comes into sliding contact with the first bending surface 620a

of the bending portion 620, and the cut surface 83a of the D-cut portion 83 does not come

into sliding contact with the protrusion surface 621a of the protrusion portion 621. A measurement of the cut surface 83a in the width direction Dw is larger than a measurement of the protrusion portion 621 in the width direction Dw and is smaller than the measurement of the bending portion 620 in the width direction Dw.

[0129] (Operational effects)

When the arm 8 turns around the axis 0 in response to opening and closing of

the inlet panel 9 for maintenance of the indoor unit 100, for example, the shaft portion 81

may go over the apex portion of the protrusion surface 621a toward the foreside Dif in a

manner of straddling this apex portion.

[0130] According to the indoor unit 100 of the embodiment, even if the shaft portion 81

tends to turn when it is positioned on the foreside Dif of the bearing portion 603, the

stopper 84 abuts the stepped surface 604a of the stepped portion 604. Accordingly, any

further turning of the shaft portion 81 from the position where the stopper 84 abuts the

stepped surface 604a is restricted by the stepped surface 604a.

[0131] Namely, when the shaft portion 81 of the arm 8 has come off from the bearing

surface 603b in response to turning of the arm 8 due to opening and closing of the inlet

panel 9, turning of the arm 8 can be regulated. Therefore, a situation in which the inlet

panel 9 is closed in a state in which fitting between the shaft portion 81 of the arm 8 and

the bearing surface 603b of the bearing portion 603 is disengaged can be avoided. As a

result, coming-off of the inlet panel 9 from the casing 1 can be curbed.

[0132] In addition, according to the indoor unit 100 of the embodiment, when the shaft

portion 81 tends to further turn at a position where the stopper 84 abuts the stepped

surface 604a, a force is applied from the stopper 84 to the stepped surface 604a. At the

same time, a reaction force against the force acts on the stopper 84 from the stepped

surface 604a. The shaft portion 81 is thrust to the downside Dvd on the protrusion

surface 621a in the narrow portion N due to this reaction force transferred to the arm main body 80 and the shaft portion 81 integrated with the stopper 84.

[0133] More specifically, a force causing the arm main body 80 and the shaft portion 81

to revolve acts about the lower end edge 604e that is a contact part between the stopper

84 and the stepped surface 604a such that these are directed to the backside Dib.

Accordingly, since the bending portion 620 integrated with the protrusion portion 621 is

elastically deformed in a manner of being bent downward, the distance between the

connection surface 604b of the stepped portion 604 and the protrusion surface 621a of

the protrusion portion 621 in the narrow portion N becomes larger than the measurement

of the shaft portion 81 in a direction perpendicular to the width direction Dw.

[0134] At the same time, since a force is applied to the backside Dib in the shaft portion

81, the shaft portion 81 is guided to the bearing surface 603b of the bearing portion 603.

Therefore, even if the shaft portion 81 has come off from the bearing surface 603b, the

shaft portion 81 can be returned to the bearing portion 603 by closing the inlet panel 9.

[0135] In addition, according to the indoor unit 100 of the embodiment, when the arm 8

comes out forward from the arm accommodation portion 52 in a state in which the inlet

panel 9 is positioned at the open position, the cut surface 83a of the D-cut portion 83

faces the protrusion surface 621a of the protrusion portion 621. Accordingly, when the

arm 8 comes out from the arm accommodation portion 52 toward the foreside Dif, the

outer circumferential surface 81a of the shaft portion 81 does not go over the protrusion

surface 621a.

[0136] That is, it is possible to reduce the magnitude of a force causing the protrusion

surface 621a and the lower end surface 603c of the bearing portion 603 to sandwich the

shaft portion 81 therebetween and a force causing the protrusion portion 621 and the

connection surface 604b of the stepped portion 604 to sandwich the shaft portion 81

therebetween. Therefore, the inlet panel 9 can smoothly come out from the casing 1.

[0137] In addition, according to the indoor unit 100 of the embodiment, when the arm 8

comes out forward from the arm accommodation portion 52 in a state in which the inlet

panel 9 is positioned at the open position, the D-cut portion 83 of the shaft portion 81

does not come into sliding contact with the protrusion surface 621a. Namely,theshaft

portion 81 does not receive an influence from the protrusion portion 621. Therefore,the

inlet panel 9 can more smoothly come out from the casing 1.

[0138] <Other embodiments>

Hereinabove, an embodiment of the present disclosure has been described in

detail with reference to the drawings. However, specific constitutions are not limited to

the constitutions of the embodiment, and addition, omission, replacement, and other

changes of the constitutions can be made within a range not departing from the gist of the

present disclosure. In addition, the present disclosure is not limited by the embodiment

and is limited by only the claims.

[0139] In the embodiment, a constitution in which the first engagement portion 521 is

formed of a material having flexibility has been described, but it is not limited to this

constitution. For example, the first engagement portion 521 may not be formed of a

material having flexibility, and the second engagement portion 61, in place of the first

engagement portion 521, maybe formed of a material having flexibility. Inaddition,

both the first engagement portion 521 and the second engagement portion 61 may be

formed of a material having flexibility.

[0140] In addition, in the embodiment, the arm accommodation portion 52 has the arm

holder 6 in which the arm insertion portion 606 is formed, but it is not limited to this

constitution. For example, a constitution in which the arm accommodation portion 52

has no arm holder 6 and the arm insertion portion 606 is directly formed in the casing 1

may be adopted.

[0141] <Appendix>

The indoor unit according to the embodiment is ascertained as follows, for

example.

[0142] (1) The indoor unit 100 according to a first aspect includes the casing 1 having

the front surface 51 and the arm accommodation portions 52 recessed backward from the

front surface 51, the arms 8 each having the arm main body 80 inserted to the arm

accommodation portion 52 from the front and the shaft portion 81 protruding in the width

direction Dw of the casing 1 from back end of the arm main body 80, and the inlet panel

9 that is fixed to front ends of the arm main bodies 80 and covering the front surface 51

of the casing 1. The arm accommodation portions 52 each have the upper guide portion

601 and the lower guide portion 602 configured to guide the shaft portion 81 backward

through the opening 50a of the arm accommodation portion 52 in a manner of being

sandwiched therebetween from above and below, the bearing portion 603 that is provided

on the back end side of the upper guide portion 601 and the lower guide portion 602 and

has the bearing surface 603b having a recessed curved surface shape capable of holding

the shaft portion 81 to be rotatable about the axis 0 extending in the width direction Dw

of the casing 1, and the stepped portion 604 that is provided between the upper guide

portion 601 and the bearing portion 603 and has the stepped surface 604a directed to the

backside Dib. The arms 8 each further have the stopper 84 that abuts the stepped

surface 604a so as to restrict turning of the shaft portion 81 when the shaft portion 81

turns in a state in which the shaft portion 81 is positioned in front of the bearing portion

603.

[0143] Accordingly, even if the shaft portion 81 tends to turn when it is positioned on

the foreside Dif of the bearing portion 603, since the stopper 84 abuts the stepped surface

604a, any further turning of the shaft portion 81 from the position where the stopper 84 abuts the stepped surface 604a is restricted. Therefore, when the shaft portion 81 of the arm 8 has come off from the bearing surface 603b in response to turning of the arm 8 due to opening and closing of the inlet panel 9, turning of the arm 8 can be regulated.

Namely, a situation in which the inlet panel 9 is closed in a state in which fitting between

the shaft portion 81 of the arm 8 and the bearing surface 603b of the bearing portion 603

is disengaged can be avoided.

[0144] (2) The indoor unit 100 according to a second aspect is the indoor unit 100

according to (1), in which the lower guide portion 602 may have the main body portion

600 having the guide surface extending in a direction in which the guide surface is

separated from the opening 50a of the arm accommodation portion 52 and formed so as

to guide the shaft portion 81 backward, the bending portion 620 that extends from the

main body portion 600 in a manner of being directed backward as the bending portion

620 goes upward and is allowed to be elastically deformed, and the protrusion portion

621 having the protrusion surface 621a having a projecting curved surface shape

protruding upward from the bending portion 620 so as to form the narrow portion N

smaller than the measurement of the shaft portion 81 in a direction orthogonal to the axis

O between the protrusion surface 621a and the stepped portion 604. Thebending

portion 620 may be elastically deformed in a manner of being is bent downward so as to

guide the shaft portion 81 to the bearing portion 603 when turning of the shaft portion 81

is restricted by the stopper 84 in a state of being sandwiched between the stepped portion

604 and the lower guide portion 602 in the narrow portion N.

[0145] Accordingly, when the shaft portion 81 tends to further turn at a position where

the stopper 84 abuts the stepped surface 604a, a force acts on the stopper 84 from the

stepped surface 604a. Since the shaft portion 81 is thrust downward on the protrusion

surface 621a in the narrow portion N due to the force transferred to the arm main body 80 and the shaft portion 81 integrated with the stopper 84, the bending portion 620 is bent downward and the shaft portion 81 is guided to the bearing portion 603. Therefore, turning of the arm 8 can be regulated and the shaft portion 81 can return to the bearing portion 603.

[0146] (3) The indoor unit 100 according to a third aspect is the indoor unit 100

according to (2), in which the range of movement of the arms 8 around the axis 0 may be

set between the closed position where the inlet panel 9 is disposed in a manner of

overlapping the front surface 51 of the casing 1 and the openings 50a of the arm

accommodation portions 52 are covered and the open position where the inlet panel 9 is

disposed forward and upward from the front surface of the casing and the front surface

51 of the casing 1 is exposed. The shaft portion 81 may have the columnar portion 82

having a columnar shape about the axis 0 and the D-cut portion 83 that integrally

extends from the end surface 81b of the columnar portion 82 directed in the axis 0

direction and has a cutout shape in a part of the outer circumferential surface 81a of the

columnar shape about the axis 0. The D-cut portion 83 may have the cut surface 83a

facing the protrusion surface 621a of the protrusion portion 621 when the arm 8 comes

out forward from the arm accommodation portion 52 in a state in which the inlet panel 9

is positioned at the open position. The measurement of the cut surface 83a in the width

direction Dw may be larger than the measurement of the protrusion portion 621 in the

width direction Dw and is smaller than the measurement of the bending portion 620 in

the width direction Dw.

[0147] Accordingly, when the arm 8 comes out forward from the arm accommodation

portion 52 in a state in which the inlet panel 9 is positioned at the open position, the cut

surface 83a of the D-cut portion 83 faces the protrusion surface 621a of the protrusion

portion621. Therefore, the outer circumferential surface 81a of the columnar portion

82 does not go over the protrusion surface 621a when the inlet panel 9 comes out from

the casing 1.

[0148] (4) The indoor unit 100 according to a fourth aspect is the indoor unit 100

according to (3), in which the outer circumferential surface 81a of the columnar portion

82 may come into sliding contact with the bending portion 620 when the arm 8 comes

out forward from the arm accommodation portion 52 in a state in which the inlet panel 9

is positioned at the open position. The cut surface 83a of the D-cut portion 83 may not

come into sliding contact with the protrusion portion 621 when the arm 8 comes out

forward from the arm accommodation portion 52 in a state in which the inlet panel 9 is

positioned at the open position.

[0149] Accordingly, when the arm 8 comes out forward from the arm accommodation

portion 52 in a state in which the inlet panel 9 is positioned at the open position, the shaft

portion 81 does not receive an influence from the protrusion portion 621.

EXPLANATION OF REFERENCES

[0150] 1 Casing

la, 9a Front edge

2 Fan

3 Heat exchanger

4 Filter portion

5 Control unit

6 Arm holder

7 Bolt

8 Arm

9 Inlet panel

10 Back surface panel

11 Back surface

20 Bottom panel

21 Bottom surface

30 Top surface panel

31 Top surface

32 Suctioning ports

40 Side surface panel

41 Side surface

50 Front panel

50a Opening

51 Front surface

52 Arm accommodation portion

53 Main openings

60 Holder main body

61 Second engagement portion

62 Fixed portion

62a Fixed surface

62b Recessed groove

62c Groove bottom surface

62d Fixed portion fastening hole

70 Connection panel

71 Curved surface

72 Discharge port

73 Flap

80 Arm main body

81 Shaft portion

81a Outer circumferential surface

81b End surface

82 Columnar portion

82a First end surface

82b Second end surface

82c First outer circumferential surface

83 D-cut portion

83a Cut surface

83b Third end surface

83c Second outer circumferential surface

84 Stopper

84a Stopper surface

100 Indoor unit

520 Holder support portion

520a Base end surface

520b Fastening surface

520c Upper surface

520d Support surface

520e Fastening hole

521 First engagement portion

522 First base portion

522a Forward surface

523 First claw portion

523a First surface

523b Restraint surface

524 Side wall portion

524a Side wall surface

600 Main body portion

600a First holder surface

600b Second holder surface

600c Third holder surface

601 Upper guide portion

601a Upper guide surface

602 Lower guide portion

602a Placement surface

602b Lower guide surface

602c Upper end surface

603 Bearing portion

603a Front end surface

603b Bearing surface

603c Lower end surface

604 Stepped portion

604a Stepped surface

604b Connection surface

604e Lower end edge

605 Connection portion

605a Abutment surface

606 Arm insertion portion

610 Second base portion

610a facing surface

611 Second claw portion

611a Second surface

611b Reception surface

620 Bending portion

620a First bending surface

620b Second bending surface

620c Third bending surface

621 Protrusion portion

621a Protrusion surface

Di Installation direction

Dif Foreside

Dib Backside

Ds Insertion direction

Dsf Forward side

Dsb Backward side

Dv Vertical direction

Dvu Upside

Dvd Downside

Dw Width direction

Dwr One side

Dwl The other side

N Narrow portion

O Axis

R Accommodation space

S Gap

W Wall surface

Claims (4)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. An indoor unit comprising:

a casing having a front surface and arm accommodation portions recessed

backward from the front surface;

arms each having arm main body inserted to the arm accommodation portion

from the front and shaft portion protruding in a width direction of the casing from back

end of the arm main body; and

an inlet panel which is fixed to front ends of the arm main bodies and covering

the front surface of the casing,

wherein the arm accommodation portions each have:

an upper guide portion and a lower guide portion configured to guide

the shaft portion backward through an opening of the arm accommodation portion in a

manner of being sandwiched therebetween from above and below;

a bearing portion that is provided on a back end side of the upper guide

portion and the lower guide portion and has a bearing surface having a recessed curved

surface shape capable of holding the shaft portion to be rotatable about an axis extending

in the width direction of the casing; and

a stepped portion that is provided between the upper guide portion and

the bearing portion and has a stepped surface directed to a backward side, and

wherein the arms each further have a stopper that abuts the stepped surface so as

to restrict turning of the shaft portion when the shaft portion turns in a state in which the

shaft portion is positioned in front of the bearing portion.

2. The indoor unit according to claim 1,

wherein the lower guide portion has

a main body portion having a guide surface extending in a direction in

which the guide surface is separated from the opening of the arm accommodation portion

and formed so as to guide the shaft portion backward,

a bending portion that extends from the main body portion in a manner

of being directed backward as the bending portion goes upward and is allowed to be

elastically deformed, and

a protrusion portion having a protrusion surface having a projecting

curved surface shape protruding upward from the bending portion so as to form a narrow

portion smaller than a measurement of the shaft portion in a direction orthogonal to the

axis between the protrusion surface and the stepped portion, and

wherein the bending portion is elastically deformed in a manner of being bent

downward so as to guide the shaft portion to the bearing portion when turning of the

shaft portion is restricted by the stopper in a state of being sandwiched between the

stepped portion and the lower guide portion in the narrow portion.

3. The indoor unit according to claim 2,

wherein the range movement of the arms around the axis is set between a closed

position where the inlet panel is disposed in a manner of overlapping the front surface of

the casing and the openings of the arm accommodation portions are covered, and an open

position where the inlet panel is disposed forward and upward from the front surface of

the casing and the front surface of the casing is exposed,

wherein the shaft portion has a columnar portion having a columnar shape about

the axis and a D-cut portion that integrally extends from an end surface of the columnar portion directed in a direction of the axis and has a cutout shape in a part of an outer circumferential surface of the columnar shape about the axis, wherein the D-cut portion has a cut surface facing the protrusion surface of the protrusion portion when the arm comes out forward from the arm accommodation portion in a state in which the inlet panel is positioned at the open position, and wherein a measurement of the cut surface in the width direction is larger than a measurement of the protrusion portion in the width direction and is smaller than a measurement of the bending portion in the width direction.

4. The indoor unit according to claim 3,

wherein the outer circumferential surface of the columnar portion comes into

sliding contact with the bending portion when the arm comes out forward from the arm

accommodation portion in a state in which the inlet panel is positioned at the open

position, and

wherein the cut surface of the D-cut portion does not come into sliding contact

with the protrusion portion when the arm comes out forward from the arm

accommodation portion in a state in which the inlet panel is positioned at the open

position.