EP4187164A1

EP4187164A1 - Indoor unit

Info

Publication number: EP4187164A1
Application number: EP22208591.2A
Authority: EP
Inventors: Shion HISAMATSU; Azusa Kanamori; Keisuke Mitoma; Tomomitsu Yamaguchi; Yuji Mori; Yusuke Doi
Original assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Current assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date: 2021-11-24
Filing date: 2022-11-21
Publication date: 2023-05-31
Anticipated expiration: 2042-11-21
Also published as: JP7752518B2; AU2022271507B2; EP4187164C0; EP4187164B1; JP2023076860A; AU2022271507A1; ES3027362T3

Abstract

An indoor unit of the present disclosure includes a casing (1) having arm accommodation portions (52) recessed backward from a front surface (51), arms (8) each having arm main body (80) inserted to the arm accommodation portion (52) from the front and shaft portion (81) protruding in a width direction from back end of the arm main body (80), and an inlet panel (9) which 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 upper and lower guide portions configured to guide the shaft portion (81) backward through an opening of the arm accommodation portion (52) 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 (81) 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 (8) each further have a stopper (84) that abuts the stepped surface 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.

Description

BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure relates to an indoor unit.

Description of Related Art

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

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.
The present disclosure has been made in order to resolve the foregoing problems, and an object thereof is to provide an indoor unit in which coming-off of an inlet panel from a casing can be curbed.
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.
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

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

Hereinafter, an indoor unit according to an embodiment of the present disclosure will be described based on the drawings.

(Indoor unit)

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.
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.

(Casing)

The casing 1 is constituted of a plurality of panels and installed on an indoor wall surface W. The casing 1 forms an outer shell of the indoor unit 100. The casing 1 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.
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.
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.
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.
The top surface panel 30 is a panel connected to an upper edge that is a side 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.
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.
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 1a of the casing 1. The top edge 1a is positioned on the furthest upward side in the casing 1.
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.
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.
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.
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.
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".
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.
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.
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.
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.
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. Each of the main openings 53 when viewed from the foreside Dif has an oblong shape having the width direction Dw as the longitudinal direction.
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.
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.
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.
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.
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.
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.
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.
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".

(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.
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.

(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.

(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.

(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.
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.
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.
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.

(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.
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.

(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.
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.
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.
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 40° to 50°, with respect to a virtual horizontal plane (spreading direction of the upper surface 520c).

(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.
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.
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.
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.

(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.
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.

(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.

(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".
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'.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.

(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.
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.
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 611b.
Therefore, the reception surface 611b and the second surface 611a of 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.
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.
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 611a of the second claw portion 611. At this time, 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.
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.
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.
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 611b 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).
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.
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.

(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.
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.
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.
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.
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.

(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 O 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.

(Shaft portion)

The shaft portion 81 has a columnar portion 82 having a columnar shape extending in the width direction Dw about the axis O, and a D-cut portion 83 integrally extending from an end surface directed in the axis O 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 O.
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.
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.
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.
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.
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 O. The axis O 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.
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.
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.
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.
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 O in a region between the protrusion surface 621a and the connection surface 604b.
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.
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 O 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.
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 O. At the same time, elastic deformation of the bending portion 620 is released, and the bending portion 620 returns to the original state.

(Arm main body)

The arm main body 80 is a member connected to the shaft portion 81 and turning about the axis O 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 O with the shaft portion 81.
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 O. 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.

(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.

(Inlet panel)

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 O. 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.
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.
On the other hand, as illustrated in FIG. 7, when the arms 8 turn around the axis O, 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".
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 1a of the casing 1 when the inlet panel 9 is positioned at the closed position.
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.
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.
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.
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.
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. At this time, 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.
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.
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.
As a 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.
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.

(Operational effects)

When the arm 8 turns around the axis O 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.
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.
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.
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.
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.
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.
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.
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.
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, the shaft 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.

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.
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, may be formed of a material having flexibility. In addition, both the first engagement portion 521 and the second engagement portion 61 may be formed of a material having flexibility.
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.

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

(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 O 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.
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.
(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. The bending 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.
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.
(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 O 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 O and the D-cut portion 83 that integrally extends from the end surface 81b of the columnar portion 82 directed in the axis O direction and has a cutout shape in a part of the outer circumferential surface 81a of the columnar shape about the axis O. 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.
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 portion 621. 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.
(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.
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

1 Casing
1a, 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

An indoor unit comprising:
a casing (1) having a front surface (51) and arm accommodation portions (52) recessed backward from the front surface (51);

arms (8) each having arm main body (80) inserted to the arm accommodation portion (52) from the front and shaft portion (81) protruding in a width direction of the casing (1) from back end of the arm main body (80); and

an inlet panel (9) which is fixed to front ends of the arm main bodies (80) and covering the front surface (51) of the casing (1),

wherein the arm accommodation portions (52) each have:
an upper guide portion (601) and a lower guide portion (602) configured to guide the shaft portion (81) backward through an opening (50a) of the arm accommodation portion (52) in a manner of being sandwiched therebetween from above and below;

a bearing portion (603) that is provided on a back end side of the upper guide portion (601) and the lower guide portion (602) and has a bearing surface (603b) having a recessed curved surface shape capable of holding the shaft portion (81) to be rotatable about an axis (O) extending in the width direction of the casing (1); and

a stepped portion (604) that is provided between the upper guide portion (601) and the bearing portion (603) and has a stepped surface (604a) directed to a backward side, and

wherein the arms (8) each further have a 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).
The indoor unit according to claim 1,
wherein the lower guide portion (602) has
a main body portion (600) having a 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,

a 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

a protrusion portion (621) having a protrusion surface (621a) having a projecting curved surface shape protruding upward from the bending portion (620) so as to form a narrow portion (N) smaller than a measurement of the shaft portion (81) in a direction orthogonal to the axis (O) between the protrusion surface (621a) and the stepped portion (604), and

wherein the bending portion (620) is elastically deformed in a manner of being 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).
The indoor unit according to claim 2,
wherein the range movement of the arms (8) around the axis (O) is set between a closed position where the inlet panel (9) is disposed in a manner of overlapping the front surface of the casing (1) and the openings (50a) of the arm accommodation portions (52) are covered, and an open position where the inlet panel (9) is disposed forward and upward from the front surface of the casing (1) and the front surface of the casing (1) is exposed,

wherein the shaft portion (81) has a columnar portion (82) having a columnar shape about the axis (O) and a D-cut portion (83) that integrally extends from an end surface of the columnar portion (82) directed in a direction of the axis (O) and has a cutout shape in a part of an outer circumferential surface of the columnar shape about the axis (O),

wherein the D-cut portion (83) has a cut surface 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, and

wherein a measurement of the cut surface (83a) in the width direction is larger than a measurement of the protrusion portion (621) in the width direction and is smaller than a measurement of the bending portion (620) in the width direction.
The indoor unit according to claim 3,
wherein the outer circumferential surface of the columnar portion (82) comes 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, and

wherein the cut surface of the D-cut portion (83) does 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.