Indoor unit

Abstract

To provide an indoor unit capable of inhibiting detachment of an inlet panel from a casing.SOLUTION: An indoor unit includes: a casing having an arm accommodation part recessed from a front surface toward a rear side; an arm having an arm body inserted into the arm accommodation part from the front side and a shaft part projecting in the width direction from a rear end of the arm body; and an inlet panel fixed to a front end of the arm body and covering the front surface of the casing. The arm accommodation part includes: an upper side guide part and a lower side guide part enabling guiding from an opening of the arm accommodation part toward the rear side so as to sandwich the shaft part from the upper and lower sides; a bearing part provided on the rear end side of the upper and lower side guide parts and capable of holding the shaft part rotatably about an axial line extending in the width direction; and a step part provided between the upper side guide part and the bearing part and having a step surface facing the rear side. The arm includes a stopper restricting rotation of the shaft part by abutting on the step surface when the shaft part is rotated while the shaft part is located on the forward side of the bearing part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an indoor unit. [Background technology]

[0002] For example, Patent Document 1 discloses an indoor unit in which a rotating arm (arm) connected to an intake grille (inlet panel) can be attached to or detached from the front panel (casing) of the indoor unit. The inlet panel is connected to one end of the arm of this indoor unit, and a shaft formed in the casing is fitted into a hole formed on the other end of the arm via a first notch. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-159508 Summary of the Invention [Problem to be solved by the invention]

[0004] During maintenance of the indoor unit, the arm and shaft may become disengaged when the inlet panel is opened or closed. The inlet panel may then be closed with the arm and shaft disengaged. As a result, the inlet panel, which is connected to the arm, may become disengaged from the casing along with the arm.

[0005] The present disclosure has been made to solve the above-mentioned problem, and has an object to provide an indoor unit that can prevent the inlet panel from becoming detached from the casing. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the indoor unit according to the present disclosure comprises a casing having a front surface and an arm housing portion recessed from the front surface toward the rear, an arm having an arm body inserted into the arm housing portion from the front and a shaft portion protruding from the rear end of the arm body in the width direction of the casing, and an inlet panel fixed to the front end of the arm body and covering the front surface of the casing, wherein the arm housing portion is configured to sandwich the shaft portion from above and below and to be able to guide it rearward from an opening of the arm housing portion. the arm further comprises an upper guide portion and a lower guide portion disposed between the upper guide portion and the lower guide portion, a bearing portion provided at the rear end side of the upper guide portion and the lower guide portion and having a bearing surface formed in a concave curved shape that can hold the shaft portion rotatably around an axis extending in the width direction of the casing, and a step portion provided between the upper guide portion and the bearing portion and having a step surface facing rearward, and the arm further comprises a stopper that abuts against the step surface to limit the rotation of the shaft portion when the shaft portion rotates in a state where it is positioned forward of the bearing portion. The lower guide portion has a main body portion that extends in a direction away from the opening of the arm accommodating portion and has a guide surface that can guide the shaft portion rearward, a bend portion that extends from the main body portion so as to move rearward as it extends upward and is elastically deformable, and a protruding portion that has a convexly curved protruding surface that protrudes upward from the bend portion and forms a narrow portion between the protruding surface and the step portion that is smaller than the dimension of the shaft portion in a direction perpendicular to the axis, and when the shaft portion is sandwiched between the step portion in the narrow portion and the lower guide portion and its rotation is restricted by the stopper, the bend portion elastically deforms to bend downward, thereby guiding the shaft portion to the bearing portion. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an indoor unit that can prevent the inlet panel from becoming detached from the casing. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of an indoor unit according to an embodiment of the present disclosure. [Figure 2] FIG. 10 is a diagram illustrating an arm housing portion according to an embodiment of the present disclosure as viewed from the front side. [Figure 3] FIG. 3 is a partial cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 1A and 1B illustrate an arm holder according to an embodiment of the present disclosure. [Figure 5] 1 illustrates an arm according to an embodiment of the present disclosure. FIG. [Figure 6] FIG. 10 illustrates a state in which the arm is in a closed position according to an embodiment of the present disclosure. [Figure 7] FIG. 10 illustrates an embodiment of the present disclosure in which the arm is in an open position. [Figure 8] 10A and 10B are diagrams illustrating a state in which the shaft portion according to the embodiment of the present disclosure is sandwiched from the front side between the connection surface and the protruding surface in the narrow portion. [Figure 9] 10A and 10B are diagrams illustrating a state in which a bent portion is bent downward by a stopper according to an embodiment of the present disclosure. [Figure 10] 10A and 10B are diagrams illustrating the interaction between the shaft and the protrusion when the arm is removed forward from the arm housing portion with the arm in the open position according to the embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an indoor unit according to an embodiment of the present disclosure will be described with reference to the drawings.

[0010] (indoor unit) The indoor unit is installed indoors and conditions the air inside the room by exchanging heat between the refrigerant and the outdoor unit installed outside the room. The indoor unit and the outdoor unit make up the air conditioning system.

[0011] As shown in FIG. 1, the indoor unit 100 includes a casing 1, a fan 2, a heat exchanger 3, a filter section 4, a control section 5, a bolt 7, an arm 8, and an inlet panel 9.

[0012] (Casing) The casing 1 is made up of multiple panels and is installed on a wall W inside a room. The casing 1 forms the outer shell of the indoor unit 100. The casing 1 defines an internal space for accommodating various devices and for circulating air within the room. The casing 1 has a back panel 10, a bottom panel 20, a top panel 30, a pair of side panels 40, a front panel 50, a connecting panel 70, and a flap 73.

[0013] The rear panel 10 is a panel that is fixed to a wall W inside a room via a mounting plate or the like (not shown). The rear panel 10 extends along the wall W and has a rear surface 11 that faces the wall W. In this embodiment, the direction in which the rear surface 11 of the rear panel 10 faces the wall W is referred to as the "installation direction Di." Therefore, the installation direction Di is a direction perpendicular to the wall W.

[0014] Of the two sides of the installation direction Di, the side facing away from the wall W is referred to as the "front side Dif," and the opposite side is referred to as the "rear side Dib." The rear surface 11 has a rectangular shape with its longitudinal direction parallel to the wall W in the horizontal direction when viewed from the front side Dif (front).

[0015] The bottom panel 20 is connected to the lower edge of the rear panel 10 and extends in a direction intersecting the wall surface W. In this embodiment, the bottom panel 20 extends horizontally and is integrally connected to the rear panel 10 so as to stand upright from the rear panel 10. The bottom panel 20 extends horizontally and has a bottom surface 21 facing the lower DVD. The bottom surface 21 extends in a direction perpendicular to the direction in which the rear panel 11 extends.

[0016] The top panel 30 is connected to the upper edge of the rear panel 10, which is opposite to the lower edge, and extends in a direction intersecting the wall surface W. In this embodiment, the top panel 30 extends horizontally and is integrally connected to the rear panel 10 so as to stand upright from the rear panel 10.

[0017] That is, the top panel 30 extends above the bottom panel 20 in a direction parallel to the direction in which the bottom panel 20 extends. The bottom panel 20 and the top panel 30 face each other at a distance from each other.

[0018] The top panel 30 extends horizontally and has a top surface 31 facing upward. The top surface 31 extends in a direction perpendicular to the direction in which the back surface 11 extends. In this embodiment, the edge (side) of the front side Dif of the top surface 31 is the front edge 1a of the casing 1. The front edge 1a is located at the uppermost position of the casing 1.

[0019] In this embodiment, the direction in which the bottom panel 20 and the top panel 30 face each other is referred to as the "vertical direction Dv." Of both sides of the vertical direction Dv, one side that faces the top panel 30 from the bottom panel 20 is simply referred to as the "upper side Dvu," and the other opposite side Dwl is simply referred to as the "lower side Dvd." Therefore, the vertical direction Dv coincides with the direction of gravity.

[0020] In this embodiment, the bottom surface 21 of the bottom panel 20 has a rectangular shape with its longitudinal direction parallel to the wall surface W in the horizontal direction when viewed from the lower side Dvd (below). The top surface 31 of the top panel 30 in this embodiment has a rectangular shape with its longitudinal direction parallel to the wall surface W in the horizontal direction when viewed from the upper side Dvu (above).

[0021] The top panel 30 is formed with a plurality of air inlets 32 for drawing in indoor air. That is, the top panel 30 has a plurality of air inlets 32. The plurality of air inlets 32 are arranged at equal intervals in the horizontal direction. Each air inlet 32 ​​penetrates the top panel 30 in the up-down direction Dv. When viewed from the upper side Dvu, each air inlet 32 ​​has a rectangular shape (oblong shape).

[0022] The side panels 40 are panels that connect the longitudinally extending edges of the rear panel 10, bottom panel 20, and top panel 30. In this embodiment, the direction that coincides with this longitudinal direction is referred to as the "width direction Dw." Therefore, the width direction Dw is a direction perpendicular to both the installation direction Di and the up-down direction Dv.

[0023] Of the two sides in the width direction Dw, when looking at the rear panel 10 from the front side Dif so that the top panel 30, rear panel 10, and bottom panel 20 are lined up from the upper side Dvu, the right side will be simply referred to as "one side Dwr," and the opposite side will be simply referred to as "the other side Dwl."

[0024] One of the pair of side panels 40 connects the edges of one side Dwr of the back panel 10, the bottom panel 20, and the top panel 30, and has a side surface 41 facing the one side Dwr.

[0025] The other of the pair of side panels 40 connects the edges of the other side Dwl of the back panel 10, the bottom panel 20, and the top panel 30, and has a side surface 41 facing the other side Dwl.

[0026] Therefore, the pair of side panels 40 are arranged to sandwich the back panel 10, bottom panel 20, and top panel 30 in the width direction Dw. Each side surface 41 extends in a direction perpendicular to the directions in which the back surface 11, bottom surface 21, and top surface 31 extend.

[0027] The front panel 50 is disposed on the forward side Dif of the rear panel 10, and connects the edges of the forward sides Dif of the top panel 30 and the pair of side panels 40 together. The front panel 50 extends in parallel with the direction in which the rear panel 10 extends. The front panel 50 extends in a direction along the wall surface W, and has a front surface 51 facing the forward side Dif.

[0028] The front panel 50 is formed with a pair of front openings 53 and a pair of arm housing portions 52. That is, the front panel 50 has a pair of front openings 53 and a pair of arm housing portions 52. The pair of front openings 53 are arranged adjacent to each other in the width direction Dw. When viewed from the front side Dif, each of the front openings 53 has a rectangular shape with the width direction Dw as the longitudinal direction.

[0029] The pair of arm accommodating sections 52 are arranged in the width direction Dw. One of the pair of arm accommodating sections 52 is arranged on one side Dwr of the front opening 53 arranged on one side Dwr of a pair of front openings 53 adjacent to each other in the width direction Dw.

[0030] The other of the pair of arm accommodating sections 52 is arranged on the other side Dwl of the pair of front openings 53 adjacent to each other in the width direction Dw with respect to the front opening 53 arranged on the other side Dwl. The detailed configuration of the arm accommodating sections 52 will be described later.

[0031] The connection panel 70 is positioned on the lower Dvd side of the front panel 50, and connects the edges of the front Dif sides of the bottom panel 20 and the pair of side panels 40, and the edges of the lower Dvd sides of the front panel 50 to each other.

[0032] The connection panel 70 has a curved surface 71 that curves from the edge of the front side Dif of the bottom panel 20 toward the edge of the lower side Dvd of the front panel 50 and faces the front side Dif.

[0033] The connection panel 70 is formed with an air outlet 72 for blowing out air sucked in through the air inlet 32 ​​of the top panel 30. That is, the connection panel 70 has the air outlet 72. When viewed from the front side Dif or the lower side Dvd, the air outlet 72 is formed in a rectangular shape with the width direction Dw as the longitudinal direction. In this embodiment, the air outlet 72 widens to follow the curvature of the curved surface 71.

[0034] The flap 73 is provided at the air outlet 72 of the connection panel 70 and redirects the direction of air blown out from the air outlet 72. The flap 73 is capable of transitioning from a state in which it covers the air outlet 72 from the front side Dif to a state in which it does not cover the air outlet 72.

[0035] The flap 73 is, for example, provided on the connection panel 70 and supported by a rotation shaft (not shown) centered on the rotation axis (not shown) extending in the width direction Dw so as to be rotatable about the rotation axis. The amount of rotation of the flap 73 is controlled, for example, based on an input signal input from the outside.

[0036] As described above, the elements constituting the casing 1 form a space for accommodating various devices and for circulating indoor air. For ease of explanation, in this embodiment, this space will be referred to as an "accommodation space R."

[0037] (fan) The fan 2 is a cross-flow fan that can introduce indoor air into the casing 1. The fan 2 extends in the width direction Dw within the accommodation space R. The fan 2 is held by the rear panel 10 so as to be rotatable about a rotation axis (not shown) that extends in the width direction Dw.

[0038] The fan 2 rotates within the accommodation space R, drawing in air through the air inlet 32 ​​of the top panel 30 and blowing the drawn-in air out through the air outlet 72 of the connection panel 70. The rotation speed of the fan 2 is controlled, for example, based on an input signal input from the outside.

[0039] (heat exchanger) The heat exchanger 3 exchanges heat between the air introduced into the accommodation space R by the fan 2 and the refrigerant. That is, the heat exchanger 3 cools or heats the air introduced into the accommodation space R. The heat exchanger 3 is composed of a heat transfer tube through which the refrigerant flows, and a plurality of fins through which the heat transfer tube is inserted in the width direction Dw. The heat exchanger 3 is provided, for example, in the accommodation space R so as to surround the fan 2 from the upper side Dvu.

[0040] (filter section) The filter unit 4 removes impurities such as dust contained in the air drawn in through the air inlet 32 ​​of the top panel 30. The filter unit 4 is disposed on the upper side Dvu of the heat exchanger 3 within the accommodation space R. In other words, the filter unit 4 is disposed between the casing 1 and the heat exchanger 3. Therefore, the filter unit 4 supplies the heat exchanger 3 with air from which impurities such as dust have been removed.

[0041] (Control unit) The control unit 5 is a device that controls the amount of rotation of the flap 73 and the rotation of the fan 2. The control unit 5 is connected to the flap 73 and the fan 2 by wire or wirelessly. The control unit 5 is provided in the accommodation space R, and is arranged on one side Dwr of the fan 2, the heat exchanger 3, and the filter unit 4.

[0042] For example, when the indoor unit 100 is equipped with a sensor (not shown) provided in the casing 1, the control unit 5 generates an input signal based on sensing information acquired by the sensor. The control unit 5 transmits the generated input signal to the flap 73 and the fan 2.

[0043] Here, we will explain the configuration of the pair of arm housing portions 52 that the front panel 50 has. When the front panel 50 is viewed from the front side Dif, the pair of arm housing portions 52 are arranged in a symmetrical relationship.

[0044] The following describes the arm housing portion 52 arranged on one side Dwr of the pair of arm housing portions 52 of the front panel 50. A description of the arm housing portion 52 arranged on the other side will be omitted.

[0045] (Arm storage section) The arm accommodating portion 52 is a recess that opens to the front surface 51 of the front panel 50 and is recessed toward the upper side Dvu as it extends toward the rear side Dib. As shown in FIGS. 2 to 4, the arm accommodating portion 52 has a holder support portion 520, a first engagement portion 521, a side wall portion 524, and an arm holder 6.

[0046] The arm housing portion 52 includes an opening 50a in the front surface 51. In this embodiment, the opening 50a has a rectangular shape when viewed from the front side Dif. The longitudinal direction of the opening 50a coincides with the up-down direction Dv.

[0047] (Holder support part) The holder support part 520 extends from the edge of the lower side Dvd of the opening 50a toward the rear side Dib and then toward the upper side Dvu. The holder support part 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 connected to the edge of the lower side Dvd of the opening 50a of the front surface 51, and is a surface that is inclined relative to the front surface 51 so as to face the upper side Dvu.

[0048] The fastening surface 520b is connected to the edge of the rear side Dib of the base end surface 520a and extends upward from the edge toward the upper side Dvu. Therefore, the fastening surface 520b faces the front side Dif.

[0049] A fastening hole 520e that opens to the fastening surface 520b and is recessed from the fastening surface 520b toward the rear side Dib is formed in the holder support portion 520. The fastening hole 520e has a thread that allows the bolt 7 to be fastened.

[0050] The upper surface 520c is connected to the edge of the upper side Dvu of the fastening surface 520b and is a surface that spreads out horizontally from that edge. The support surface 520d is connected to the edge of the rear side Dib of the upper surface 520c and is a surface that is inclined so as to face the front side Dif with respect to the upper surface 520c. In this embodiment, the support surface 520d is formed so as to be inclined at an angle of, for example, 40 to 50 degrees with respect to an imaginary horizontal plane (the direction in which the upper surface 520c spreads).

[0051] (first engagement part) The first engagement portion 521 extends from the edge of the rear side Dib of the holder support portion 520 toward the upper side Dvu. In this embodiment, the first engagement portion 521 is formed of a flexible material. The first engagement portion 521 has a first base portion 522 and a first claw portion 523. The first base portion 522 is a flat plate-shaped member that extends upward from the edge of the rear side Dib of the holder support portion 520.

[0052] Therefore, the first base portion 522 extends above the support surface 520d in a direction intersecting the direction in which the support surface 520d extends. The first base portion 522 is connected to the edge of the support surface 520d on the rear side Dib and has a front surface 522a that extends upward from the edge toward the upper side Dvu. The front surface 522a faces the front side Dif and is connected to the support surface 520d.

[0053] The first claw portion 523 is a flat plate-shaped member extending toward the front side Dif from an edge of the upper side Dvu of the first base portion 522 toward the upper side Dvu. Therefore, the first claw portion 523 extends above the support surface 520d in a direction intersecting the direction in which the support surface 520d widens.

[0054] In this embodiment, the first claw portion 523 has a first surface 523a that extends in a direction perpendicular to the direction in which the support surface 520d extends and is connected to the front surface 522a, and a holding surface 523b that faces the side opposite to the first surface 523a.

[0055] (Side wall) The side wall portion 524 extends so as to connect the edge of the other side Dwl of the opening 50a, the holder support portion 520, and the first engagement portion 521. The side wall portion 524 in this embodiment is formed of a flexible material.

[0056] The side wall portion 524 extends in a direction perpendicular to the width direction Dw, and has a side wall surface 524a that faces the one side Dwr on the other side Dwl relative to the holder support portion 520 and the first engagement portion 521.

[0057] (Arm holder) The arm holder 6 is a member that is inserted from the front surface 51 side through the opening 50a and is detachably fixed to the holder support part 520 to become one with the holder support part 520. As shown in FIGS. 1 and 4, the arm holder 6 has a holder main body 60, a second engagement part 61, and a fixing part 62.

[0058] (Holder body) The holder main body 60 is a member that is placed on the support surface 520d when inserted into the arm accommodating section 52, and corresponds to the main body portion of the arm holder 6. Here, the direction in which the holder main body 60 is inserted into the arm accommodating section 52 is referred to as the "insertion direction Ds."

[0059] The insertion direction Ds is a direction that coincides with the extension direction of the holder support part 520. Of both sides of the insertion direction Ds, one side that is away from the front surface 51 is referred to as the "rear side Dsb," and the opposite side (the direction that is closer to the front surface 51) is referred to as the "front side Dsf."

[0060] The holder main body 60 has a first holder surface 600a facing one side Dwr, a second holder surface 600b facing the other side Dwl 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 and facing the front side Dsf. When the holder main body 60 is inserted into the arm accommodating section 52, the second holder surface 600b faces and comes into contact with the side wall surface 524a of the side wall portion 524.

[0061] The configuration of each element of the arm holder 6 (the holder main body 60, the second engagement portion 61, and the fixing portion 62) when the holder main body 60 is placed on the support surface 520d of the holder support portion 520 will be described below.

[0062] The holder main body 60 has a lower guide portion 602, a bearing portion 603, an upper guide portion 601, a step portion 604, and a connecting portion 605. The lower guide portion 602 is a flat plate-shaped member placed on the support surface 520d. The lower guide portion 602 extends in a direction perpendicular to the width direction Dw. The lower guide portion 602 has a main body portion 600, a bent portion 620, and a protruding portion 621.

[0063] The main body 600 is a plate-shaped member that extends in the installation direction Di and the up-down direction Dv. The main body 600 has a placement surface 602a that faces the support surface 520d and is placed on the support surface 520d, a lower guide surface 602b (guide surface) that faces the opposite side to the placement surface 602a and extends in a direction away from the opening 50a, and an upper end surface 602c that faces the upper side Dvu on the rear side Dib of the lower guide surface 602b.

[0064] The bend portion 620 extends from the main body portion 600 between the lower guide surface 602b and the upper end surface 602c of the main body portion 600 in the installation direction Di, toward the upward side Dvu and toward the rearward side Dib. The dimension of the bend portion 620 in the width direction Dw is the same as the dimension of the main body portion 600 in the width direction Dw. The bend portion 620 in this embodiment is formed of a flexible material.

[0065] The bend portion 620 has a first bend surface 620a that is curved and faces the upward side Dvu, a second bend surface 620b that is connected to the first bend surface 620a and faces the backward side Dib, and a third bend surface 620c that is connected to the second bend surface 620b and forms a curved surface that faces the downward side Dvd.

[0066] The first bend surface 620a is connected to the lower guide surface 602b of the main body 600 from the rear side Dsb. The second bend surface 620b is a flat surface that connects the rear end edge of the first bend surface 620a and the rear end edge of the third bend surface 620c in the up-down direction Dv. The third bend surface 620c is connected to the second bend surface 620b from the front side Dif and is formed to extend along the first bend surface 620a. A gap S is formed between the third bend surface 620c and the upper end surface 602c of the main body 600 in the up-down direction Dv.

[0067] The protruding portion 621 has a protruding surface 621a that forms a convex shape protruding toward the upper side Dvu by protruding toward the upper side Dvu from the first bend surface 620a of the bend portion 620. The protruding surface 621a has an apex that is located at the uppermost side Dvu when viewed from one side Dwr.

[0068] The protruding portion 621 protrudes from a first bend surface 620a of the bend portion 620 on the other side Dwl when the bend portion 620 is bisected in the width direction Dw toward the upper side Dvu integrally with the bend portion 620. Therefore, when viewed from the one side Dwr, the protruding surface 621a and the first bend surface 620a have different heights.

[0069] The bearing portion 603 is integrally connected from the upper side Dvu to the upper end surface 602c of the main body portion 600 in the lower guide portion 602. The bearing portion 603 is a plate-shaped member that extends in the installation direction Di and the up-down direction Dv. The dimension of the bearing portion 603 in the width direction Dw is the same as the dimension of the main body portion 600 in the width direction Dw.

[0070] The bearing portion 603 has a front end surface 603a that is connected to the upper end surface 602c of the main body portion 600 from the upper side Dvu and faces the forward side Dif, a bearing surface 603b that is connected to the edge of the upper side Dvu on the front end surface 603a from the upper side Dvu and is recessed from this front end surface 603a toward the rear side Dib, and a lower end surface 603c that is connected to the edge of the upper side Dvu on the bearing surface 603b from the front side Dif and faces the downward side Dvd.

[0071] The front end surface 603a and the lower end surface 603c are flat. The bearing surface 603b is a concave curved surface. Specifically, the bearing surface 603b is a semi-cylindrical inner peripheral surface that is concave toward the rear side Dib when viewed from one side Dwr. The bearing surface 603b is located on the upper side Dvu of the opening 50a. The dimensions 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 the dimension of the upper end surface 602c in the width direction Dw.

[0072] Here, the first holder surface 600a in the holder main body 60 is formed by connecting the surfaces facing one side Dwr of the main body 600 and bend portion 620 of the lower guide portion 602, and the bearing portion 603 with each other.

[0073] The upper guide portion 601 is disposed above the lower guide portion 602 (Dvu) and in front of the bearing portion 603 (Dif). The upper guide portion 601 extends in a direction away from the opening 50a and has an upper guide surface 601a facing the lower guide surface 602b. The dimension of the upper guide portion 601 in the width direction Dw is larger than the dimensions of the lower guide portion 602 and the bearing portion 603 in the width direction Dw. The dimension of the upper guide surface 601a in the width direction Dw is larger than the dimensions of the lower guide surface 602b, the upper end surface 602c, the bearing surface 603b, and the lower end surface 603c.

[0074] The step 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 in the installation direction Di. In this embodiment, the step portion 604 has a step surface 604a facing the rear side Dib, and a connection surface 604b connected to the step surface 604a and facing the downward side Dvd.

[0075] The step surface 604a widens so as to rise from the edge of the front side Dif toward one side Dwr on the first holder surface 600a of the bearing portion 603. The connection surface 604b is flat and widens in a direction perpendicular to the step 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.

[0076] Here, the dimension of the connecting surface 604b in the width direction Dw is the same as the dimension of the upper guide surface 601a in the width direction Dw. The difference between the dimension of the connecting surface 604b in the width direction Dw and the dimension of the lower end surface 603c of the bearing portion 603 in the width direction Dw is equal to the dimension of the step portion 604 in the width direction Dw.

[0077] The connecting portion 605 is a plate-like member that interconnects the lower guide portion 602, the bearing portion 603, the upper guide portion 601, and the stepped portion 604, and extends in the installation direction Di and the up-down direction Dv. The connecting portion 605 interconnects a lower guide surface 602b of the main body 600 of the lower guide portion 602, a bearing surface 603b and a lower end surface 603c of the bearing portion 603, an upper guide surface 601a of the upper guide portion 601, and a connecting surface 604b of the stepped portion 604, and has an abutment surface 605a that faces one side Dwr on the other side Dwl relative to the lower guide surface 602b, the bearing surface 603b, the lower end surface 603c, the upper guide surface 601a, and the connecting surface 604b.

[0078] In this embodiment, the abutment surface 605a is not connected to the first bend surface 620a, the second bend surface 620b, and the third bend surface 620c of the bend 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.

[0079] Therefore, in the bend portion 620, the connection point with the main body portion 600 is a fixed end, and the end extending from the main body portion 600 is a free end. The edge of the front side Dsf on the abutment surface 605a connects the edge of the front side Dsf on the lower guide surface 602b and the edge of the front side Dsf on the upper guide surface 601a in the vertical direction Dv.

[0080] Here, the second holder surface 600b is formed by connecting together the surfaces of the main body 600 and bent portion 620 of the lower guide portion 602, the bearing portion 603, the upper guide portion 601, and the connecting portion 605 that face the other side Dwl. Also, the third holder surface 600c is formed by connecting together the surfaces of the lower guide portion 602, the upper guide portion 601, and the connecting portion 605 that face the forward side Dif.

[0081] In this embodiment, the lower guide surface 602b of the lower guide portion 602, the bearing surface 603b and 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 fixing portion 62, and the abutment surface 605a of the connection portion 605 form a groove-shaped arm insertion portion 606 that is recessed from the first holder surface 600a in the holder main body 60 toward the other side Dwl and opens to the third holder surface 600c.

[0082] (Second engagement part) The second engagement portion 61 is a member that extends integrally from the main body portion 600 of the lower guide portion 602 in the holder main body 60 toward the back side Dsb, and is engageable with the first engagement portion 521. The second engagement portion 61 has a second base portion 610 and a second claw portion 611.

[0083] The second base portion 610 is a flat plate-shaped member extending from the main body portion 600 of the lower guide portion 602 toward the rear side Dsb. The second base portion 610 has an opposing surface 610a that faces the support surface 520d. The opposing surface 610a extends parallel to the direction in which the support surface 520d extends.

[0084] The second claw portion 611 is a flat plate-shaped member extending from an edge of the far side Dsb of the second base portion 610 toward the downward side Dvd and toward the rear side Dib. In this embodiment, the second claw portion 611 has a receiving surface 611b that extends in a direction perpendicular to the direction in which the opposing surface 610a extends and is connected to the opposing surface 610a, and a second surface 611a that faces the side opposite to the receiving surface 611b.

[0085] Therefore, the receiving surface 611b and the second surface 611a of the second claw portion 611 extend parallel to the direction in which the first surface 523a and the clamping surface 523b of the first claw portion 523 in the first engagement portion 521 extend. The receiving surface 611b and the second surface 611a of the second claw portion 611 are arranged to overlap with the first surface 523a and the clamping surface 523b when viewed from the insertion direction Ds.

[0086] Here, we will explain the relationship between the first engagement portion 521 and the second engagement portion 61 when the holder main body 60 is inserted into the arm accommodating portion 52. When the holder main body 60 is inserted into the arm accommodating portion 52 toward the back side Dsb, the second surface 611a of the second claw portion 611 comes into contact with the first surface 523a of the first claw portion 523.

[0087] When the holder body 60 is further inserted toward the rear side Dsb from the position where the first surface 523a and the second surface 611a contact each other, the first surface 523a of the first claw portion 523 receives pressure from the second surface 611a of the second claw portion 611. At this time, because the first engagement portion 521 is flexible, the first claw portion 523 and the first base portion 522 connected to the first claw portion 523 bend toward the rear side Dsb.

[0088] The bending of the first claw portion 523 and the first base portion 522 toward the rear side Dsb allows the second surface 611a of the second claw portion 611 to climb over the edge of the first surface 523a of the first claw portion 523 and move toward the rear side Dsb beyond the holding surface 523b of the first claw portion 523. In other words, the second claw portion 611 climbs over the first claw portion 523 from the front side Dsf toward the rear side Dsb.

[0089] Because the first engagement portion 521 is flexible, as soon as the second claw portion 611 passes over the first claw portion 523, the bending of the first claw portion 523 and the first base portion 522 toward the rear side Dsb is eliminated, and the first claw portion 523 and the first base portion 522 return to their original positions.

[0090] When the first claw portion 523 and the first base portion 522 return to their original positions and are inserted into the rear side Dsb of the holder main body 60, the clamping surface 523b of the first claw portion 523 and the receiving 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 shown in Figure 4).

[0091] At this time, due to the weight of the holder body 60, a pulling force is applied to the second engagement portion 61 (second claw portion 611 and second base portion 610) toward the front side Dsf, but the receiving surface 611b of the second claw portion 611 is pressed down by the clamping surface 523b of the first claw portion 523, and receives a force from this clamping surface 523b toward the rear side Dsb.

[0092] The force acting on the clamping surface 523b from the receiving surface 611b, which is based on the weight of the holder main body 60, and the force acting on the receiving surface 611b from the clamping surface 523b, which is based on the flexible material of the first engaging portion 521, are balanced, so that the main body 600 is brought to rest on the support surface 520d. The engagement between the first engaging portion 521 and the second engaging portion 61 is completed by the series of actions described above.

[0093] (Fixed part) The fixing portion 62 is a member that extends integrally from the main body portion 600 of the lower guide portion 602 in the holder main body 60, and is fixed to the holder support portion 520. The fixing portion 62 is fixed to the holder support portion 520, thereby positioning the main body portion 600 on the support surface 520d.

[0094] The fixing portion 62 extends from the main body 600 toward the front side Dsf and has a fixing surface 62a that is flush with the front surface 51 inside the opening 50a. The fixing portion 62 has a recessed groove 62b that opens to the fixing surface 62a and is recessed from the fixing surface 62a toward the rear side Dib.

[0095] Furthermore, the fixing portion 62 is formed with a fixing portion fastening hole 62d that opens to a groove bottom surface 62c of the recessed groove 62b and penetrates the fixing portion 62 from the groove bottom surface 62c toward the rear side Dib. The fixing portion fastening hole 62d has a thread that can fasten a bolt 7.

[0096] That is, in this embodiment, the fixing portion 62 is countersunk so that the head of the bolt 7 does not protrude forward Dif beyond the fixing surface 62a. The fixing portion fastening hole 62d of the fixing portion 62 is formed to have the same dimensions as the fastening hole 520e of the holder support portion 520, and overlaps with the fastening hole 520e so as to be continuous with it in the installation direction Di.

[0097] The fixing portion 62 is fixed to the holder support portion 520 by fastening the bolt 7 into the fixing portion fastening hole 62d and the fastening hole 520e continuing from the front side Dif. That is, the bolt 7 is attached to the holder support portion 520 from the front side Dif, thereby fixing the fixing portion 62 to the holder support portion 520. In other words, the bolt 7 is attached to the casing 1 from the front side Dif, thereby fixing the arm holder 6 to the casing 1.

[0098] (arm) The arm 8 is inserted into the arm accommodating portion 52 from the front surface 51 side, and one end thereof is held rotatably about an axis O extending in the width direction Dw by an arm insertion portion 606 formed in the holder body 60 of the arm holder 6. As shown in FIGS.

[0099] (shaft) The shaft portion 81 has a cylindrical portion 82 that has a cylindrical shape and extends in the width direction Dw centered on the axis O, and a D-cut portion 83 that extends integrally from the end face of the cylindrical portion 82 facing the axis O direction and has a shape in which a portion of the cylindrical outer surface 81a centered on the axis O is cut out.

[0100] The cylindrical portion 82 has a first end face 82a facing the one side Dwr, a second end face 82b facing the other side Dwl, and a first outer peripheral surface 82c connecting the first end face 82a and the second end face 82b to each other. The first end face 82a is circular and corresponds to the end face 81b of the one side Dwr of the cylindrical portion 82. The second end face 82b is D-shaped when viewed from the other side Dwl and corresponds to the end face 81b of the other side Dwl of the cylindrical portion 82. The first outer peripheral surface 82c corresponds to the outer peripheral surface 81a of the cylindrical portion 82 and is cylindrical.

[0101] The D-cut portion 83 has a cut surface 83a that is connected to the second end face 82b of the cylindrical portion 82 and extends in a direction perpendicular to the second end face 82b, a third end face 83b that is connected to the cut surface 83a and faces the other side Dwl, and a second outer peripheral surface 83c that connects the first outer peripheral surface 82c, the cut surface 83a, and the third end face 83b to each other.

[0102] The cut surface 83a is a flat surface that extends upward from the second end surface 82b 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.

[0103] When viewed from the other side Dwl, the second end face 82b and the third end face 83b form a perfect circle of the same size and shape as the first end face 82a. The second outer peripheral surface 83c corresponds to the outer peripheral surface 81a of the D-cut portion 83 and has a cylindrical surface shape. Hereinafter, for convenience of explanation, the first outer peripheral surface 82c and the second outer peripheral surface 83c may be referred to simply as the "outer peripheral surface 81a" without being distinguished from each other.

[0104] The shaft portion 81 is inserted into the arm accommodating portion 52 from the front surface 51 side while extending in the width direction Dw, and then inserted into the arm insertion portion 606 formed in the holder body 60 of the arm holder 6. The shaft portion 81 inserted into the arm insertion portion 606 is held by the bearing surface 603b of the bearing portion 603 so as to be rotatable about the axis O. When the shaft portion 81 is held by the bearing surface 603b, the axis O coincides with the center line (cylinder center line) of the bearing surface 603b, which is the inner peripheral surface of a cylinder.

[0105] Here, a description will be given of the state when the shaft portion 81 is inserted into the arm insertion portion 606. When the shaft portion 81 is inserted between the upper guide portion 601 and the lower guide portion 602 of the arm insertion portion 606, the outer peripheral surface 81a of the shaft portion 81 comes into contact with the upper guide surface 601a or the lower guide surface 602b, respectively. The third end surface 83b of the D-cut portion 83 comes into contact with the abutment surface 605a of the connection portion 605.

[0106] When a force toward the upper side Dvu or the rear side Dib is applied to the shaft portion 81, the outer surface 81a slides against the upper guide surface 601a or the lower guide surface 602b, and the third end surface 83b of the D-cut portion 83 slides against the abutment surface 605a, and the entire shaft portion 81 is guided in the direction in which the upper guide surface 601a and the lower guide surface 602b extend, i.e., toward the rear side Dsb.

[0107] The outer surface 81a of the shaft portion 81 guided to the rear side Dsb slides against the protruding surface 621a of the protruding portion 621 and the connecting surface 604b of the step portion 604 following the upper guide surface 601a, and approaches the narrow portion N formed between the protruding surface 621a and the connecting surface 604b from the front side Dsf, and abuts against each of the protruding surface 621a and the connecting surface 604b in this narrow portion N.

[0108] That is, the shaft portion 81 is sandwiched between the protruding surface 621a and the connecting surface 604b at the narrow portion N. The narrow portion N in this embodiment is a region between the protruding surface 621a and the connecting surface 604b, which is smaller than the dimension of the shaft portion 81 in the direction perpendicular to the axis O.

[0109] Here, when a force is further applied that moves the shaft portion 81 toward the rear side Dib, the protruding surface 621a that abuts against the shaft portion 81 at the narrow portion N receives a force from the shaft portion 81 in the normal direction to the tangent of the protruding surface 621a. At the same time, of the force received from the shaft portion 81 in this normal direction, a vertical component of the force that is directed toward the downward side Dvd acts via the protruding portion 621 on the bent portion 620 that is integrally connected to the protruding portion 621. As a result, the bent portion 620 elastically deforms so as to bend toward the downward side Dvd.

[0110] As a result, the distance between the protruding surface 621a and the connecting surface 604b in the narrow portion N becomes larger than the dimension in the direction perpendicular to the axis O of the shaft portion 81, and the shaft portion 81 moves over the peak of the protruding surface 621a when viewed from one side Dwr toward the rear side Dsb, climbing over this peak, and is guided further rearward than this peak to the rear side Dib.

[0111] The shaft portion 81, which has been guided to the rear side Dib of the apex of the protruding surface 621a, is held by the bearing surface 603b of the bearing portion 603 so as to be rotatable about the axis O. At the same time, the elastic deformation of the bent portion 620 is released, and the bent portion 620 returns to its original state.

[0112] (Arm body) The arm body 80 is a member that is connected to the shaft portion 81 and rotates around the axis O as the shaft portion 81 rotates. Specifically, one end of the arm body 80 is fixed integrally with the cylindrical portion 82 so as to cover part of the first outer peripheral surface 82c of the cylindrical portion 82 of the shaft portion 81 from the outer periphery side. In other words, the arm body 80 rotates around the axis O integrally with the shaft portion 81.

[0113] The arm body 80 is inserted into the arm accommodating section 52 when the shaft portion 81 is positioned about the axis O. When viewed from one side Dwr, the arm body 80 forms a U-shape tilted toward the front side Dif. When assembling the indoor unit 100, the shaft portion 81 is inserted into the arm accommodating section 52 together with the arm body 80 in a fixed state. Therefore, the shaft portion 81 and the arm body 80 are not inserted into the arm accommodating section 52 separately.

[0114] (Stopper) The stopper 84 is a plate-shaped member provided on the arm main body 80. When the shaft portion 81 rotates while being positioned at a position Dif forward of the bearing portion 603, the stopper 84 comes into contact with a step surface 604a of the step portion 604, thereby restricting the rotation of the shaft portion 81.

[0115] (inlet panel) The inlet panel 9 is a panel that can transition between a state in which it covers the front surface 51 of the front panel 50 from the front side Dif and a state in which it does not cover the front surface 51 as the arm 8 rotates around the axis O. The inlet panel 9 is connected to the other end of the arm main body 80. By covering the front surface 51 of the front panel 50 from the front side Dif, the inlet panel 9 closes the front surface opening 53 that opens on the front surface 51 and the opening 50a of the arm accommodating section 52.

[0116] Here, we will explain the state of the inlet panel 9 when the arm 8 rotates. As shown in Figure 6, before the arm 8 rotates, the inlet panel 9 connected to the other end of the arm 8 is positioned so as to overlap the front surface 51 of the front panel 50, and is in a position covering the opening 50a of the arm housing section 52.

[0117] 7, when the arm 8 rotates around the axis O, the inlet panel 9 connected to the other end of the arm 8 moves from a position covering the opening 50a to the forward side Dif and the upper side Dvu, transitioning to a position that opens the front surface 51. In this embodiment, the former position (FIG. 6) is referred to as the "closed position," and the latter position (FIG. 7) is referred to as the "open position."

[0118] In this embodiment, the leading edge 9a is the edge of the upper side Dvu of the inlet panel 9. As shown in Fig. 6, the leading edge 9a of the inlet panel 9 is located below the leading edge 1a of the casing 1 when the inlet panel 9 is located in the closed position.

[0119] Here, we will explain the state of the stopper 84 when the shaft 81 rotates while being positioned on the forward side Dif of the bearing 603. When the arm 8 is positioned in the closed position, the stopper 84 protrudes toward the upper side Dvu from the end of the upper side Dvu of the arm main body 80 as viewed from one side Dwr.

[0120] In this case, the stopper 84 has a stopper surface 84a that faces the step surface 604a of the step portion 604 in the installation direction Di. The stopper 84 in this embodiment has a triangular shape with one vertex located on the upper side Dvu above the arm main body 80 when viewed from one side Dwr when the arm 8 is in the closed position.

[0121] For example, in the process of opening and closing the inlet panel 9 during maintenance of the indoor unit 100, i.e., in the process of the arm 8 transitioning between the closed position and the open position, a force that urges the arm body 80 toward the front side Dif (a force that pulls it toward the front side Dif) may act via the inlet panel 9. When the arm 8 is in the open position, if a force that urges the arm body 80 toward the front side Dif acts, the shaft portion 81 that is integral with the arm body 80 is also pulled toward the front side Dif.

[0122] As a result, the protruding surface 621a receives a force from the shaft portion 81 in the normal direction to the tangent of the portion in contact with the outer peripheral surface 81a of the shaft portion 81. At the same time, of the force received in this normal direction, a vertical component of the force directed toward the lower side Dvd acts via the protruding portion 621 on the bent portion 620 that is integrally connected to the protruding portion 621. As a result, a force pushing toward the lower side Dvd acts from the shaft portion 81 on the protruding portion 621.

[0123] When a force pushing the lower Dvd acts on the protruding portion 621 from the shaft portion 81, the bent portion 620 integral with the protruding portion 621 elastically deforms so as to bend toward the lower Dvd. As a result, for example, as shown in FIG. 8, the shaft portion 81 may climb over the top of the protruding surface 621a in the direction toward the forward side Dif. At this time, the stopper surface 84a abuts against the lower edge 604e of the lower Dvd at the step surface 604a. Therefore, for example, when the shaft portion 81 is positioned between the bent portion 620 and the step portion 604 at the narrow portion N, the rotation of the shaft portion 81 may be restricted by the stopper 84.

[0124] Here, when the arm 8 transitions from the open position to the closed position, the counterclockwise rotation of the shaft 81 as viewed from one side Dwr applies a pressing force to the lower edge 604e of the step surface 604a of the step portion 604. Meanwhile, the stopper 84 receives a reaction force against this pressing force from the lower edge 604e, and a force component of this reaction force that is oriented toward the downward side Dvd is transmitted to the shaft 81 that is integral with the arm main body 80 via the arm main body 80 that is connected to the stopper 84, and at the same time, acts from the shaft 81 to the protrusion 621.

[0125] As a result, as shown in Figure 9, the bend portion 620 integral with the protrusion 621 elastically deforms so as to bend downward Dvd, and the distance between the connection surface 604b and the protrusion surface 621a in the narrow portion N becomes larger than the dimension of the shaft portion 81 in the direction perpendicular to the width direction Dw.

[0126] As a result of the bent portion 620 being bent downward Dvd, the shaft portion 81 is guided again to the bearing surface 603b of the bearing portion 603, as shown in Fig. 6. Therefore, for example, even if the shaft portion 81 comes off the bearing portion 603 toward the front side Dif when the arm 8 is in the open position and moves toward the front side Dif so as to straddle the apex of the protruding surface 621a, the stopper 84 can guide the shaft portion 81 back to the bearing portion 603 in the process of the arm 8 transitioning to the closed position. In other words, even if the shaft portion 81 moves to the front side Dif beyond the bearing portion 603 when the inlet panel 9 is opened, the shaft portion 81 can be re-inserted into the bearing portion 603 by closing the inlet panel 9.

[0127] 10, when the arm 8 is positioned in the open position and is removed forward from the arm housing portion 52, the cut surface 83a of the D-cut portion 83 faces the protruding surface 621a of the protruding portion 621. At this time, the first outer peripheral surface 82c of the cylindrical portion 82 is in sliding contact with the first bend surface 620a of the bent portion 620, and the cut surface 83a of the D-cut portion 83 is not in sliding contact with the protruding surface 621a of the protruding portion 621. The dimension of the cut surface 83a in the width direction Dw is larger than the dimension of the protruding portion 621 in the width direction Dw and smaller than the dimension of the bent portion 620 in the width direction Dw.

[0128] (Action and effect) When the arm 8 rotates around the axis O in conjunction with opening and closing the inlet panel 9 for maintenance of the indoor unit 100, for example, the shaft portion 81 may climb over the top of the protruding surface 621a toward the forward side Dif, straddling this top.

[0129] According to the indoor unit 100 of this embodiment, even if the shaft portion 81 attempts to rotate when it is positioned at Dif forward of the bearing portion 603, the stopper 84 abuts against the step surface 604a of the step portion 604. As a result, the step surface 604a prevents the shaft portion 81 from rotating any further from the position where the stopper 84 abuts against the step surface 604a.

[0130] That is, when the shaft 81 of the arm 8 comes off the bearing surface 603b as the arm 8 turns to open or close the inlet panel 9, it is possible to restrict the turning of the arm 8. This makes it possible to prevent the inlet panel 9 from being closed in a state where the fitting between the shaft 81 of the arm 8 and the bearing surface 603b of the bearing 603 is released, and as a result, it is possible to prevent the inlet panel 9 from coming off the casing 1.

[0131] Furthermore, according to the indoor unit 100 of the embodiment, when the shaft 81 attempts to rotate further at a position where the stopper 84 abuts against the step surface 604a, a force is applied from the stopper 84 to the step surface 604a, and at the same time, a reaction force against the force acts from the step surface 604a on the stopper 84. This reaction force is transmitted through the arm main body 80 and the shaft 81, which are integral with the stopper 84, and the shaft 81 is pushed into the downward side Dvd on the protruding surface 621a in the narrow portion N.

[0132] More specifically, a force acts to revolve the arm main body 80 and the shaft portion 81 toward the rear side Dib around the lower edge 604e, which is the contact portion between the stopper 84 and the step surface 604a. As a result, the bent portion 620 integrated with the protrusion 621 elastically deforms so as to bend downward, and the distance between the connection surface 604b of the step portion 604 and the protrusion surface 621a of the protrusion 621 at the narrow portion N becomes larger than the dimension of the shaft portion 81 in the direction perpendicular to the width direction Dw.

[0133] At the same time, a force toward the rear side Dib is applied to the shaft portion 81, so that the shaft portion 81 is guided to the bearing surface 603b of the bearing portion 603. Therefore, even if the shaft portion 81 comes off the bearing surface 603b, the shaft portion 81 can be returned to the bearing portion 603 by closing the inlet panel 9.

[0134] Furthermore, according to the indoor unit 100 of the embodiment, when the arm 8 is removed forward from the arm housing portion 52 with the inlet panel 9 in the open position, the cut surface 83a of the D-cut portion 83 faces the protruding surface 621a of the protruding portion 621. As a result, when the arm 8 is removed forward from the arm housing portion 52 Dif, the outer peripheral surface 81a of the shaft portion 81 does not ride up onto the protruding surface 621a.

[0135] That is, it is possible to reduce the force with which shaft portion 81 is sandwiched between protruding surface 621a and lower end surface 603c of bearing portion 603, and the force with which shaft portion 81 is sandwiched between protruding portion 621 and connecting surface 604b of stepped portion 604. Therefore, inlet panel 9 can be smoothly removed from casing 1.

[0136] Furthermore, according to the indoor unit 100 of this embodiment, when the arm 8 is removed forward from the arm housing portion 52 with the inlet panel 9 in the open position, the D-cut portion 83 of the shaft portion 81 does not come into sliding contact with the protruding surface 621a. In other words, the shaft portion 81 is not affected by the protruding portion 621. This allows the inlet panel 9 to be removed from the casing 1 more smoothly.

[0137] [Other embodiments] Although the embodiments of the present disclosure have been described above in detail with reference to the drawings, the specific configurations are not limited to those of the embodiments, and additions, omissions, substitutions, and other modifications of the configurations are possible within the scope of the gist of the present disclosure. Furthermore, the present disclosure is not limited to the embodiments, but is limited only by the claims.

[0138] In the embodiment, the first engagement portion 521 is formed of a flexible material, but the present invention is not limited to this configuration. For example, the first engagement portion 521 may not be formed of a flexible material, and the second engagement portion 61 may be formed of a flexible material instead of the first engagement portion 521. Furthermore, both the first engagement portion 521 and the second engagement portion 61 may be formed of a flexible material.

[0139] In addition, in the embodiment, the arm accommodating section 52 has the arm holder 6 in which the arm insertion section 606 is formed, but this configuration is not limited to this. For example, the arm accommodating section 52 may not have the arm holder 6, and the arm insertion section 606 may be formed directly on the casing 1.

[0140] [Note] The indoor unit described in the embodiment can be understood, for example, as follows.

[0141] (1) The indoor unit 100 according to the first aspect comprises a casing 1 having a front surface 51 and an arm housing portion 52 recessed from the front surface 51 toward the rear, an arm 8 having an arm main body 80 inserted from the front into the arm housing portion 52 and a shaft portion 81 protruding from the rear end of the arm main body 80 in the width direction Dw of the casing 1, and an inlet panel 9 fixed to the front end of the arm main body 80 and covering the front surface 51 of the casing 1, and the arm housing portion 52 has an upper guide portion 601 and a lower guide portion 602 that are arranged to be able to guide the shaft portion 81 toward the rear from an opening 50a of the arm housing portion 52 so as to sandwich the shaft portion 81 from above and below. The arm 8 has a guide portion 602, a bearing portion 603 provided at the rear end side of the upper guide portion 601 and the lower guide portion 602 and having a bearing surface 603b with a concave curved shape that can hold the shaft portion 81 rotatably around an axis O extending in the width direction Dw of the casing 1, and a step portion 604 provided between the upper guide portion 601 and the bearing portion 603 and having a step surface 604a facing the rear side Dib, and the arm 8 further has a stopper 84 that abuts against the step surface 604a to limit the rotation of the shaft portion 81 when the shaft portion 81 rotates while positioned forward of the bearing portion 603.

[0142] As a result, even if the shaft 81 attempts to rotate when positioned at Dif forward of the bearing 603, the stopper 84 abuts against the stepped surface 604a, and the shaft 81 is restricted from rotating any further from the position where the stopper 84 abuts against the stepped surface 604a. Therefore, even if the shaft 81 of the arm 8 comes off the bearing surface 603b as the arm 8 rotates in conjunction with opening or closing the inlet panel 9, the rotation of the arm 8 can be restricted. In other words, it is possible to prevent the inlet panel 9 from being closed in a state where the shaft 81 of the arm 8 and the bearing surface 603b of the bearing 603 are no longer fitted together.

[0143] (2) The indoor unit 100 according to a second aspect is the indoor unit 100 of (1), wherein the lower guide portion 602 includes a main body portion 600 that extends in a direction away from the opening 50a of the arm housing portion 52 and has a guide surface that can guide the shaft portion 81 rearward, a bent portion 620 that extends from the main body portion 600 so as to face rearward as it extends upward and is elastically deformable, and a protruding surface 621a that protrudes upward from the bent portion 620 and has a convex curved shape. By doing so, the bend portion 620 has a protrusion 621 that forms a narrow portion N between the protrusion surface 621a and the step portion 604, the narrow portion N being smaller than the dimension of the shaft portion 81 in a direction perpendicular to the axis O, and when the shaft portion 81 is sandwiched between the step portion 604 and the lower guide portion 602 in the narrow portion N and its rotation is restricted by the stopper 84, the bend portion 620 may guide the shaft portion 81 to the bearing portion 603 by elastically deforming so as to bend downward.

[0144] As a result, when the shaft 81 attempts to rotate further at a position where the stopper 84 abuts against the stepped surface 604a, a force is applied from the stepped surface 604a to the stopper 84. This force is transmitted through the arm main body 80 and the shaft 81, which are integral with the stopper 84, and the shaft 81 is pushed downward on the protruding surface 621a in the narrow portion N, causing the bent portion 620 to bend downward and the shaft 81 to be guided into the bearing portion 603. This restricts the rotation of the arm 8 and allows the shaft 81 to return to the bearing portion 603.

[0145] (3) The indoor unit 100 according to a third aspect is the indoor unit 100 of (2), wherein the arm 8 is rotatable about the axis O between a closed position in which the inlet panel 9 is arranged so as to overlap the front surface 51 of the casing 1 and covers the opening 50a of the arm accommodating portion 52, and an open position in which the inlet panel 9 moves forward and upward from the closed position to open the front surface 51 of the casing 1, and the shaft portion 81 extends integrally from a columnar portion 82 that forms a columnar shape centered on the axis O and an end surface 81b of the columnar portion 82 that faces the direction of the axis O. and a D-cut portion 83 having a shape in which a portion of the cylindrical outer peripheral surface 81a is cut out, both of which are centered on the axis O, and the D-cut portion 83 has a cut surface 83a that faces the protruding surface 621a of the protruding portion 621 when the arm 8 is removed forward from the arm accommodating portion 52 with the inlet panel 9 positioned in the open position, and the dimension of the cut surface 83a in the width direction Dw may be larger than the dimension of the protruding portion 621 in the width direction Dw and smaller than the dimension of the bend portion 620 in the width direction Dw.

[0146] As a result, when the arm 8 is removed forward from the arm housing portion 52 with the inlet panel 9 in the open position, the cut surface 83a of the D-cut portion 83 faces the protruding surface 621a of the protruding portion 621. Therefore, when the inlet panel 9 is removed from the casing 1, the outer circumferential surface 81a of the cylindrical portion 82 does not ride up onto the protruding surface 621a.

[0147] (4) The indoor unit 100 according to a fourth aspect is the indoor unit 100 of (3), wherein the outer peripheral surface 81a of the cylindrical portion 82 slides against the bend portion 620 when the arm 8 is removed forward from the arm accommodating portion 52 with the inlet panel 9 positioned in the open position, and the cut surface 83a of the D-cut portion 83 does not have to slide against the protrusion 621 when the arm 8 is removed forward from the arm accommodating portion 52 with the inlet panel 9 positioned in the open position.

[0148] As a result, when the arm 8 is removed forward from the arm housing portion 52 with the inlet panel 9 in the open position, the shaft portion 81 is not affected by the protrusion 621. [Explanation of symbols]

[0149] DESCRIPTION OF SYMBOLS 1...Casing 1a, 9a...Front edge 2...Fan 3...Heat exchanger 4...Filter section 5...Control section 6...Arm holder 7...Bolt 8...Arm 9...Inlet panel 10...Rear panel 11...Rear side 20...Bottom panel 21...Bottom surface 30...Top panel 31...Top surface 32...Intake port 40...Side panel 41...Side surface 50...Front panel 50a...Opening 51...Front surface 52...Arm accommodating section 53...Front opening 60...Holder body 61...Second engagement section 62...Fixing section 62a...Fixing surface 62b...Groove 62c...Groove bottom surface 62d...Fixing section fastening hole 70...Connection panel 71...Curved surface 72...Outlet 73...Flap 80...Arm body 81...Shaft section 81a...Outer surface 81b...End surface 82...Cylindrical section 82a...first end surface 82b...second end surface 82c...first outer peripheral surface 83...D-cut portion 83a...cut surface 83b...third end surface 83c...second outer peripheral 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...front surface 523...first claw portion 523a...first surface 523b...holding 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...placing surface 602b...lower guide surface 602c...upper end surface 603...bearing portion 603a...front end surface 603b...bearing surface 603c...lower end surface 604...step portion 604a...step surface 604b...connecting surface 604e...lower end edge 605...connecting portion 605a...butting surface 606...arm insertion portion 610...second base portion 610a...opposing surface 611...second claw portion 611a...second surface 611b...receiving surface 620...bending portion 620a...first bend surface 620b...second bend surface 620c...third bend surface 621...protruding portion 621a...protruding surface Di...installation direction Dif...front side Dib...rear side Ds...insertion direction Dsf...front side Dsb...back side Dv...vertical direction Dvu...upper side Dvd...lower side Dw...width direction Dwr...one side Dwl...other side N...narrow area O...axis R...storage space S...gap W...wall

Claims

1. a casing having a front surface and an arm accommodating portion recessed rearward from the front surface; an arm having an arm body inserted into the arm housing portion from the front and a shaft portion protruding from a rear end of the arm body in a width direction of the casing; an inlet panel fixed to a front end of the arm body and covering a front surface of the casing; Equipped with The arm accommodating portion is an upper guide portion and a lower guide portion that are provided so as to sandwich the shaft portion from above and below and be capable of guiding the shaft portion rearward from the opening of the arm accommodating portion; a bearing portion provided at a rear end of the upper guide portion and the lower guide portion, the bearing portion having a bearing surface formed in a concave curved shape that can hold the shaft portion rotatably about an axis extending in the width direction of the casing; a step portion provided between the upper guide portion and the bearing portion and having a step surface facing rearward; and the arm further includes a stopper that, when the shaft portion rotates in a state where the shaft portion is positioned forward of the bearing portion, abuts against the step surface to limit the rotation of the shaft portion, The lower guide portion is a main body portion extending in a direction away from the opening of the arm accommodating portion and having a guide surface capable of guiding the shaft portion rearward; a bend portion extending from the main body portion so as to extend rearward as it extends upward, and the bend portion is elastically deformable; a protruding portion having a protruding surface that protrudes upward from the bend portion and has a convex curved shape, thereby forming a narrow portion between the protruding surface and the step portion, the narrow portion having a dimension smaller than that of the shaft portion in a direction perpendicular to the axis; and The bend portion of the indoor unit guides the shaft portion to the bearing portion by elastically deforming downward when the shaft portion is sandwiched between the step portion and the lower guide portion in the narrow portion and its rotation is restricted by the stopper.

2. The arm a closed position in which the inlet panel is disposed so as to overlap the front surface of the casing and covers the opening of the arm accommodating portion; an open position in which the inlet panel moves forward and upward from the closed position to open the front surface of the casing; and is rotatable about the axis between the shaft portion has a cylindrical portion that forms a cylindrical shape centered on the axis line, and a D-cut portion that extends integrally from an end face of the cylindrical portion facing the axial direction and that forms a shape in which a part of the outer circumferential surface of the cylindrical shape centered on the axis line is cut out, the D-cut portion has a cut surface that faces the protruding surface of the protruding portion when the arm is removed forward from the arm accommodating portion with the inlet panel positioned at the open position, The indoor unit according to claim 1 , wherein a dimension of the cut surface in the width direction is larger than a dimension of the protruding portion in the width direction and smaller than a dimension of the bent portion in the width direction.

3. an outer peripheral surface of the cylindrical portion comes into sliding contact with the bent portion when the arm is removed forward from the arm accommodating portion with the inlet panel positioned at the open position; The indoor unit according to claim 2 , wherein the cut surface of the D-cut portion does not come into sliding contact with the protrusion when the arm is removed forward from the arm accommodating portion with the inlet panel positioned in the open position.

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