JP7314402B2 - Air conditioner indoor unit - Google Patents

Description

An embodiment of the present invention relates to an indoor unit of an air conditioner.

Generally, an indoor unit of an air conditioner includes an air inlet, an air outlet, a heat exchanger, and a fan that generates an airflow from the inlet to the outlet via the heat exchanger.

An indoor space to be air-conditioned is adjusted to an optimum temperature by an air current (hereinafter referred to as "outflow air") that is temperature-controlled and blown out from an air outlet. In order to efficiently adjust the temperature of the indoor space, for example, it is preferable that the blown air has a long reaching distance and a large air volume.

WO2017/142026

The problem to be solved by the present invention is to provide an indoor unit of an air conditioner that can efficiently achieve both extension of the reaching distance of blown air and increase in air volume.

An indoor unit of an air conditioner according to one embodiment includes a heat exchanger, a housing, a fan, a tubular member, a wind direction plate , and a drive mechanism . The housing accommodates the heat exchanger and has an opening facing the heat exchanger. The fan generates a current of air heat-exchanged in the heat exchanger. The wind direction plate adjusts the inclination of the airflow blown out from the outlet. The cylindrical member has an airflow outlet for blowing the airflow into the indoor space, forms an air passage through which the airflow passes continuously from the opening side to the air outlet side, and has a pair of narrowed portions that narrow the cross-sectional area of the air passage on the blowout port side from the cross-sectional area on the opening side from both sides of the air passage. At least one of the pair of narrowed portions has a recess recessed from the outer peripheral surface of the cylindrical member so as to protrude into the air passage. The drive mechanism is arranged in the recess.

FIG. 1 is a schematic perspective view of an indoor unit according to one embodiment. 2 is a schematic cross-sectional view of the indoor unit along line II-II in FIG. 1. FIG. 3 is a schematic cross-sectional view of the indoor unit along line III-III in FIG. 1. FIG. FIG. 4 is a schematic perspective view of the indoor unit with the outlet cover removed. FIG. 5 is a schematic perspective view of a rotating unit.

An embodiment will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of an indoor unit 1 according to this embodiment. The indoor unit 1 is connected to an outdoor unit including a compressor for compressing a refrigerant, an outdoor heat exchanger, and the like through refrigerant piping. An air conditioner having a refrigeration cycle is configured by the indoor unit 1, the outdoor unit, refrigerant pipes, and the like. The air conditioner can switch between cooling operation and heating operation, for example. However, the air conditioner may be capable of executing only the cooling operation or the heating operation.

In this embodiment, the X direction, Y direction and Z direction are defined as shown in FIG. These X, Y and Z directions are orthogonal to each other. The Z direction is parallel to the vertical direction. In the following description, the Z direction may be called upward, and the opposite direction may be called downward.

The indoor unit 1 includes a housing 2 and an outlet unit 4 having an outlet 3 at its tip. The housing 2 includes a front plate 20, a front cover 21 arranged above the front plate 20, a rear plate 22 facing the front plate 20 and the front cover 21, a pair of side plates 23 and 24 facing each other, a bottom plate 25, and a top plate 26 facing the bottom plate 25. The indoor unit 1 may be installed alone, or may be installed in a state of being stacked in multiple stages in the Z direction by connecting the rear plate 22 to a frame arranged along the pillars or walls of the building, for example. Also, a plurality of indoor units 1 may be arranged in the X direction, or may be installed at positions separated from each other.

The front plate 20, front cover 21 and rear plate 22 are parallel to the XZ plane defined by the X and Z directions. The side plates 23, 24 are parallel to the YZ plane defined by the Y and Z directions. The bottom plate 25 and top plate 26 are parallel to the XY plane defined by the X and Y directions. In the example shown in FIG. 1, the housing 2 is a flat rectangular parallelepiped whose width in the Y direction is sufficiently smaller than its width in the X and Z directions. However, the shape of the housing 2 is not limited to this example.

The front cover 21 is arranged between the front plate 20 and the top plate 26 in the Z direction. The front cover 21 is attached to the front plate 20 with screws 211 . Further, for example, a pair of claw portions are provided on the rear surface of the front cover 21, and these claw portions are hooked on mounting holes provided in the side plates 23 and 24. As shown in FIG. In such a structure, the front cover 21 can be attached to and detached from other parts of the housing 2 by removing the screws 211 . Note that the structure for making the front cover 21 detachable is not limited to the one illustrated here.

The outlet unit 4 includes a cylindrical cover (hereinafter referred to as outlet cover) 40 that tapers toward the outlet 3 . The air outlet cover 40 covers the outer peripheral surfaces of the first cylindrical member 92 and the second cylindrical member 31, which will be described later, to protect the constituent members of the air outlet unit 4 including the air outlet 3 (such as the rectifying plate 94, the first cylindrical member 92, and the second cylindrical member 31, which will be described later), and improve the appearance design. The outlet cover 40 is attached to the front plate 20 by at least screws 41 . In the example shown in FIG. 1, a recess 42 is provided on the outer peripheral surface of the outlet cover 40, and a screw 41 is passed through a through hole of the end surface of the recess 42 on the housing 2 side. The contour line of the outlet cover 40 has a curved line shape.

The outlet unit 4 further includes a louver 5 provided on the outlet 3 . In the example shown in FIG. 1, the louver 5 is composed of three rotatable wind direction plates 51, 52, 53. As shown in FIG. The number of wind deflectors is not limited to three, and the louver 5 may be composed of two or less or four or more wind deflectors. The wind direction plates 51 , 52 , 53 adjust the inclination of the airflow blown out from the outlet 3 .

2 to 4 show a schematic configuration of the indoor unit 1. FIG. 2 is a cross-sectional view along line II-II in FIG. 1, and FIG. 3 is a cross-sectional view along line III-III in FIG. FIG. 4 is a schematic perspective view of the indoor unit 1 with the outlet cover 40 removed.
As shown in FIGS. 2 and 3, a heat exchanger 6 is arranged inside the housing 2 . The heat exchanger 6 includes a plurality of heat transfer tubes 60 extending in the X direction and a plurality of fins 61 connected to the heat transfer tubes 60 . The plurality of fins 61 has an elongated shape in the Z direction as shown in FIG. 2, and is arranged in a row in the X direction at intervals.

The back plate 22 is provided with connection ports 62 and 63 for refrigerant pipes for connecting to the outdoor unit, and a suction port 27 facing the heat exchanger 6 . For example, the connection port 62 is connected to the inlet of the flow channel formed by each heat transfer tube 60 , and the connection port 63 is connected to the outlet of the flow channel.

A drain pan 64 for receiving condensed water generated in the heat exchanger 6 is arranged below the heat exchanger 6 . Condensed water accumulated in the drain pan 64 is discharged to the outside of the housing 2 through a pipe (not shown).

A mounting plate 70 parallel to the XZ plane is arranged above the heat exchanger 6 . The mounting plate 70 faces the front cover 21 and the rear plate 22 . A partition plate 71 parallel to the XY plane is connected to the lower end of the mounting plate 70 . A heat insulating material 65 is arranged between the partition plate 71 and the heat exchanger 6 . The mounting plate 70 and the partition plate 71 may be integrally formed by bending one plate material into an L shape, or may be separate plate materials. A space S1 for accommodating the controller 8 is formed by the mounting plate 70, the partition plate 71, the front cover 21, and the top plate 26. As shown in FIG.

The control unit 8 includes a control board 80 and various electronic components 81 . The control board 80 is attached to the mounting plate 70 . Each electronic component 81 is mounted on one surface of the control board 80 facing the front cover 21 . The controller 8 is connected with a remote controller installed outside the indoor unit 1, an outdoor unit, a communication line for communicating with other indoor units, and a power line. These communication lines and power lines extend to the outside of the indoor unit 1 through insertion holes provided in the rear plate 22, for example.

The front plate 20 has an opening 29 overlapping the heat exchanger 6 in the Y direction. A fan 9 facing the heat exchanger 6 through the opening 29 is arranged inside the blowout port cover 40 . The fan 9 generates a current of air whose temperature is controlled by heat exchange in the heat exchanger 6 . The fan 9 is, for example, an axial fan, and includes a fan motor 90 and a plurality of blades 91 rotated about an axis AX by the fan motor 90 . In this embodiment, the axis AX is parallel to the Y direction.

The fan 9 is arranged inside a first cylindrical member 92 coaxial with the axis AX. The first tubular member 92 surrounds the opening 29 outside the housing 2 and inside the blowout port cover 40 . At least part of the outer peripheral surface of the first cylindrical member 92 is covered with a heat insulating material 93 .

The louver 5 is arranged at the end of the second cylindrical member 31 coaxial with the axis AX. The wind direction plates 51, 52, 53 of the louver 5 are rotated by a drive mechanism (hereinafter referred to as a louver drive mechanism) 33 including a motor 34, for example. However, the wind direction plates 51, 52, 53 may be manually rotatable.

At least part of the outer peripheral surface 31 a of the second cylindrical member 31 is covered with a heat insulating material 32 . The blowout port 3 corresponds to an opening on the tip side of the second cylindrical member 31 . In the examples shown in FIGS. 2 and 3, the center of the outlet 3 is on the axis AX (the central axis of the outlet 3 and the axis AX are coincident).

As shown in FIGS. 3 and 4 , a louver driving mechanism 33 is provided on the outer peripheral surface 31 a (a recessed portion 310 described later) of the second cylindrical member 31 . The louver drive mechanism 33 includes gears and the like for changing the angles of the wind direction plates 51, 52, 53 by the driving force of the motor 34, and rotates the wind direction plates 51, 52, 53 to predetermined inclinations.

The louver 5 , the second cylindrical member 31 , the heat insulating material 32 , the louver drive mechanism 33 and the motor 34 constitute a rotating unit 30 . The rotating unit 30 is held by the holding mechanism 10 so as to be rotatable about the axis AX.

Specifically, the holding mechanism 10 rotatably connects the second cylindrical member 31 to the first cylindrical member 92 . The holding mechanism 10 includes, for example, an annular gear provided at the end of the second cylindrical member 31 (base end 31b, which will be described later), and the second cylindrical member 31 is rotated with respect to the first cylindrical member 92 by sending the gear in the circumferential direction about the axis AX by the motor 11. The second cylindrical member 31 may be manually rotatable. In this case, the second cylindrical member 31 may be rotatably supported with respect to the first cylindrical member 92 by, for example, arranging three gears at equal intervals in the circumferential direction about the axis AX and engaging the gears.

The first tubular member 92 and the second tubular member 31 constitute an air passage AD. The air passage AD is a passage through which the air heat-exchanged (temperature-controlled) in the heat exchanger 6 becomes an air flow due to the rotation of the fan 9 . A central axis of the air passage AD coincides with the axis AX. A current plate 94 is arranged between the fan 9 and the louver 5 in the air path AD. The straightening plate 94 is supported by the first cylindrical member 92 and straightens the turbulent airflow just after being generated by the fan 9 substantially parallel to the axis AX. The straightening plate 94 has, for example, a honeycomb structure in which a large number of hexagonal openings are arranged, but is not limited to this example. The first cylindrical member 92 , the second cylindrical member 31 , and the straightening plate 94 are included in the constituent members of the outlet unit 4 .

When the fan 9 rotates, an air current is generated that passes through the suction port 27 , the heat exchanger 6 , the rectifying plate 94 and the air outlet 3 in this order. During cooling operation, the heat exchanger 6 functions as an evaporator to cool the air sucked from the suction port 27 . During heating operation, the heat exchanger 6 functions as a condenser to warm the air sucked from the suction port 27 . The temperature-controlled airflow is rectified by the rectifying plate 94 and blown out from the outlet 3 into the indoor space in a direction corresponding to the angles of the airflow direction plates 51 , 52 , 53 of the louver 5 .

The controller 8 controls the number of rotations of the fan 9 based on information input from the outside, the intake temperature and the blowout temperature detected by the temperature sensor provided in the indoor unit 1, and the like. Further, the control unit 8 controls the holding mechanism 10 and the louvers 5 based on the wind direction setting information input from the outside. By rotating the rotating unit 30 with the holding mechanism 10 and changing the angles of the wind direction plates 51, 52, and 53 of the louver 5, it is possible to blow air in various directions.

Next, the structure of the second tubular member 31 that forms the air passage AD together with the first tubular member 92 will be described.
As shown in FIGS. 2 and 3, the first cylindrical member 92 corresponds to the upstream portion of the air passage AD, and constitutes an air passage from the opening 29 of the front plate 20 to the current plate 94 (hereinafter referred to as first air passage AD1). On the other hand, the second cylindrical member 31 corresponds to the downstream portion of the air passage AD, and constitutes an air passage from the current plate 94 to the outlet 3 (hereinafter referred to as a second air passage AD2). The first air passage AD1 and the second air passage AD2 communicate with each other via the rectifying plate 94 . In the second air path AD2, the airflow is deflected in directions according to the angles of the wind direction plates 51, 52, 53 of the louvers 5. FIG.

FIG. 5 is a schematic perspective view of the rotating unit 30. FIG. FIG. 5 shows the louver 5 and the second cylindrical member 31 among the elements included in the rotating unit 30 . In the example shown in FIG. 5, the wind direction plates 51, 52, 53 of the louver 5 are open parallel to the axis AX.

The first air passage AD1 is configured in a straight shape with a substantially constant cross-sectional area on the XZ plane (a plane perpendicular to the axis AX). That is, the cross-sectional area (opening area) of the first air passage AD1 on the opening 29 side and the cross-sectional area on the straightening plate 94 side are substantially the same. On the other hand, the second air passage AD2 is tapered so that the cross-sectional area on the XZ plane narrows (gradually changes) toward the downstream. That is, the cross-sectional area of the second air passage AD2 on the side of the outlet 3 is smaller than the cross-sectional area of the straightening plate 94 side, that is, the cross-sectional area of the first air passage AD1.

Therefore, as shown in FIGS. 2, 3, and 5, the second cylindrical member 31 has a large-diameter portion at the base end portion 31b on the rectifying plate 94 side, and a small-diameter portion at the tip portion 31c on the blowout port 3 side.

The proximal end 31b has a flange 311. As shown in FIG. The flange 311 is located on the large diameter side of the second cylindrical member 31 and forms part of the holding mechanism 10 . A plurality of meshing teeth 312 are formed along the entire periphery of the flange 311 . The plurality of meshing teeth 312 form an annular gear and mesh with meshing teeth (not shown) of the motor 11 .

The tip portion 31 c has a flange 313 . The flange 313 is located on the small diameter side of the second tubular member 31, and extends in the radially expanding direction along the entire circumference of the outer peripheral edge of the distal end portion 31c. The outer diameter dimension of the flange 313 is slightly smaller than the inner diameter dimension of the tip portion 40 a of the outlet cover 40 so as not to hinder the rotation of the second cylindrical member 31 with respect to the first cylindrical member 92 . However, the outer diameter of the flange 313 is set so that there is no noticeable gap between the flange 313 and the tip portion 40a of the outlet cover 40 when the indoor unit 1 is viewed from the front.

In addition, as shown in FIGS. 2, 3 and 5, the second cylindrical member 31 has a narrowed portion 31e that further narrows the cross-sectional area of the second air passage AD2. The narrowed portion 31e is a portion that protrudes into the second air passage AD2 from a part of the inner peripheral surface 31f of the second cylindrical member 31, and narrows the second air passage AD2 by the amount of protrusion. Due to the throttle portion 31e, the cross-sectional area of the second air passage AD2 on the blowout port 3 side is narrower than the cross-sectional area on the rectifying plate 94 side, namely, on the opening 29 side. In this embodiment, the narrowed portions 31e are arranged in a pair at positions symmetrical with respect to the axis AX, and narrow the second air passage AD2 from both sides in the transverse direction (radial direction) in parallel. The axis AX corresponds to the central axis of the cross section of the second air passage AD2 on the XZ plane.

The shape of the pair of narrowed portions 31e is defined by a first side e1, a second side e2, a third side e3, a fourth side e4, a fifth side e5, and a sixth side e6.
The first side e1 is a side portion that linearly connects two points on the circumference defining the contour of the outlet 3 when the indoor unit 1 is viewed from the front. A first side e1 of the pair of narrowed portions 31e is a linear portion of the narrowed portions 31e. The second side e2 is a side portion that is in contact with the inner peripheral surface 31f in parallel with the axis AX from one end of the first side e1. The third side e3 is a side portion that contacts the inner peripheral surface 31f in parallel with the axis AX from the other end of the first side e1, and is parallel to the second side e2. The fourth side e4 is a side portion connecting the ends of the second side e2 and the third side e3 on the side opposite to the continuous ends with the first side e1, and is parallel to the first side e1. The fifth side e5 is a side portion continuous from one end of the fourth side e4 along the inner peripheral surface 31f. The sixth side e6 is a side portion continuous from the other end of the fourth side e4 along the inner peripheral surface 31f.

The first to fourth sides e1 to e4 define a flat surface 315. As shown in FIG. In other words, flat surface 315 includes first to fourth sides e1 to e4. The flat surface 315 is a surface portion that protrudes in a quadrilateral shape toward the second air passage AD2, in other words, a surface portion that recesses the outer peripheral surface 31a of the second cylindrical member 31 in a quadrilateral shape. The flat surface 315 serves as a pair of mounting surfaces 315a, 315b for mounting the wind direction plates 51, 52, 53 thereon. The mounting surfaces 315a and 315b face each other in a direction (the X direction in the example shown in FIG. 5) that intersects the direction in which the wind direction plates 51, 52 and 53 are arranged. For example, the mounting surfaces 315a and 315b are flat surfaces having three mounting holes (not shown) aligned in the arrangement direction of the wind direction plates 51, 52 and 53. As shown in FIG. The shaft portions 54 of the wind direction plates 51, 52, 53 are respectively inserted into the mounting holes. The shaft portions 54 are provided so as to protrude one by one from the wind direction plates 51, 52, 53 to both sides in the X direction.
As described above, the louver driving mechanism 33 is provided on the outer peripheral surface 31a of the second cylindrical member 31, and its position corresponds to the narrowed portion 31e. Specifically, the louver driving mechanism 33 is arranged on the side of the outer peripheral surface 31a of the narrowed portion 31e, that is, in a portion recessed from the outer peripheral surface 31a (hereinafter referred to as a recess 310). In other words, the narrowed portion 31e is configured to have a concave portion 310. As shown in FIG. In the present embodiment, the recessed portion 310 is a portion of the narrowed portion 31e projecting into the second air passage AD2 as seen from the outer peripheral surface 31a side, and corresponds to a portion of the second cylindrical member 31 that substantially coincides with each other.

In the example shown in FIG. 4, the louver drive mechanism 33 is arranged in the recess 310 on the back side of the mounting surface 315b, but the louver drive mechanism 33 may be arranged in the recess 310 on the back side of the mounting surface 315a. It should be noted that only one of the pair of narrowed portions 31e may have the recessed portion 310 . When one recessed portion 310 is omitted, the narrowed portion 31e may be configured such that a portion corresponding to the recessed portion 310 is filled with the base material of the second cylindrical member 31 . As shown in FIG. 3, the heat insulating material 32 is interposed between the recess 310 and the louver driving mechanism 33. As shown in FIG.

A portion of the flange 313 and a front surface 31s of the narrowed portion 31e are provided with projections 314 projecting forward. A front surface 31s of the narrowed portion 31e is a surface portion surrounded by the peripheral edge of the outlet 3 and the first side e1. The projections 314 are arranged in pairs at point-symmetrical positions with respect to the axis AX. However, the number of protrusions 314 is not particularly limited. There may be two, as in the examples shown in FIGS. 1 and 3 to 5, or three or more, or only one. For example, the protrusion may be provided only on one of the pair of narrowed portions 31e.

The protrusion 314 is an input portion to which a force for rotating the second cylindrical member 31 is applied when the second cylindrical member 31 is manually rotated with respect to the first cylindrical member 92, and functions as a handle. When rotating the second cylindrical member 31, the protrusion 314 may be pinched and the second cylindrical member 31 may be rotated by a desired amount in the circumferential direction about the axis AX. In the examples shown in FIGS. 1 and 3 to 5, the protrusion 314 has a form extending linearly in the radial direction of the outlet 3, but is not limited to the form shown. For example, the shape of the protrusion may be columnar (boss). Alternatively, as long as it is possible to rotate the second cylindrical member 31, it may have a recessed form such as a hole or a groove instead of the projection. In this case, the second tubular member 31 is rotated by hooking a finger or a jig on these holes or grooves.

Further, in the present embodiment, at least a portion of the outlet unit 4 that is exposed to the atmosphere (outside air) is made of a crystalline resin. As an example, each member constituting the outlet unit 4, specifically, the outlet cover 40, the wind direction plates 51, 52, 53, the current plate 94, the first cylindrical member 92, and the second cylindrical member 31, are all made of crystalline resin. Examples of crystalline resins that can be applied include polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), but are not limited to these examples. In addition to the members described above, the blades 91 of the fan 9 and the case of the fan motor 90 may also be made of crystalline resin. Alternatively, the substrate of each of these members may be formed of a material other than the crystalline resin, and the substrate may be coated with the crystalline resin.

With the structure of the indoor unit 1 described above, it is possible to extend the reaching distance of the blown air while suppressing the decrease in the air volume of the air current (hereinafter referred to as the blown air) that is temperature-controlled, passes through the air path AD, and is blown out from the outlet 3.

That is, in the present embodiment, the first cylindrical member 92 forming the first air passage AD1 of the air passage AD is configured in a straight shape having a substantially constant cross-sectional area on the XZ plane (a plane perpendicular to the axis AX). On the other hand, the second cylindrical member 31 that constitutes the second air passage AD2 has an intermediate portion 31d with a reduced diameter, and the cross-sectional area in the XZ plane narrows (gradually changes) downstream. Therefore, the cross-sectional area (opening area) of the first air passage AD1 on the side of the opening 29 can be set to a desired size to ensure the air volume of the blown air. At the same time, since the cross-sectional area of the second air passage AD2 communicating with the first air passage AD1 on the side of the outlet 3 can be made smaller than the cross-sectional area of the first air passage AD1, the reaching distance of the blown air can be extended.

In addition, since the second cylindrical member 31 has the narrowed portion 31e that further narrows the cross-sectional area of the tapered second air passage AD2, it is possible to further extend the reaching distance of the blown air. As a result, it is possible to efficiently achieve both extension of the reaching distance of the blown air and an increase in the air volume. Therefore, it is possible to efficiently adjust the temperature of the indoor space to be air-conditioned.

Further, by having the constricted portion 31 e , a recessed portion 310 is formed in the second cylindrical member 31 , and the louver drive mechanism 33 is arranged in the recessed portion 310 . Therefore, the concave portion 310 does not become a dead space, and an appropriate space for arranging the louver driving mechanism 33 can be secured. Thereby, the louver driving mechanism 33 can be arranged without securing an extra space between the outer peripheral surface 31 a of the second cylindrical member 31 and the outlet cover 40 .

Furthermore, since the louver driving mechanism 33 does not protrude into the second air passage AD2, the louver driving mechanism 33 does not hinder the ventilation of the blown air. Therefore, it is possible to prevent the louver driving mechanism 33 from becoming a draft resistance of the blown air and affecting the reaching distance and the air volume.

A protrusion (handle) 314 is provided on a portion of the flange 313, and the handle 314 extends to the drawn portion 31e. Therefore, it is possible to arrange a large handle 314 that is easy to operate without providing a separate dedicated space for arranging the handle 314 . Therefore, the second cylinder member 31 can be smoothly rotated, and the operability can be improved. This makes it possible not only to deflect the inclination by the louver drive mechanism 33, but also to change the circumferential position of the louvers 5 (airflow direction plates 51, 52, 53) around the axis AX, so that the air can be blown out in the optimum direction of the indoor space to be air-conditioned.

In the present embodiment, the outlet cover 40, the wind direction plates 51, 52, 53, the current plate 94, the first tubular member 92, and the second tubular member 31, which constitute the outlet unit 4, are all made of crystalline resin. Since each of these members is made of a crystalline resin such as polypropylene, it is easy to process and can improve mass productivity. In addition, since the crystalline resin has high resistance to oil mist, paint solvent, etc., even in an environment where these components are contained in the atmosphere, the blower outlet unit 4, and thus the indoor unit 1, can be used for a long period of time.

Although several embodiments of the invention have been described above, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

REFERENCE SIGNS LIST 1 indoor unit 2 housing 3 outlet 4 outlet unit 5 louver 6 heat exchanger 8 control section 9 fan 10 holding mechanism 30 rotating unit 31 second cylinder member 31a outer peripheral surface 31b base end 31c tip 31d intermediate section 31e diaphragm 31f inner peripheral surface 31s front surface 310 concave portion 311 flange , 312... meshing tooth, 313... flange, 314... projection (handle), 315... flat surface, 316a, 316b... mounting surface, 32... heat insulating material, 33... louver drive mechanism, 34... motor, 40... outlet cover, 40a... tip end, 51, 52, 53... wind direction plate, 90... fan motor, 91... blade, 92... first cylindrical member, 94... current plate, AD... air passage, AD1 . . . the first air passage, AD2 .

Claims (5)

a heat exchanger;
a housing containing the heat exchanger and having an opening facing the heat exchanger;
a fan for generating a flow of air heat-exchanged in the heat exchanger;
a cylindrical member having an air outlet for blowing the airflow into an indoor space and forming an air passage through which the airflow passes continuously from the opening side to the air outlet side;
a wind direction plate for adjusting the inclination of the airflow blown out from the outlet;
a driving mechanism for rotating the wind direction plate to a predetermined inclination ,
The cylindrical member has a pair of constricted portions that narrow the cross-sectional area of the air passage on the outlet side from the cross-sectional area on the opening side from both sides in the crossing direction of the air passage,
At least one of the pair of throttle portions has a recess recessed from the outer peripheral surface of the cylindrical member so as to protrude into the air passage,
The drive mechanism is arranged in the recess
Air conditioner indoor unit. 2. The indoor unit of the air conditioner according to claim 1, wherein the pair of narrowed portions has linear portions that narrow the cross-sectional area of the air passage on the outlet side of the air passage from both sides in the crossing direction of the air passage. The pair of narrowed portions has a flat mounting surface to which the wind direction plate is mounted,
The indoor unit of the air conditioner according to claim 2, wherein the mounting surface includes the linear portion as one side. A holding mechanism that holds the cylindrical member rotatably about the central axis of the outlet,
2. The indoor unit of the air conditioner according to claim 1, wherein at least one of the pair of throttle sections has an input section to which a force for rotating the cylindrical member is applied. a cover that covers the outer peripheral surface side of the tubular member;
and a rectifying plate that rectifies the airflow,
The indoor unit of the air conditioner according to any one of claims 1 to 4 , wherein the cylindrical member, the wind direction plate, the rectifying plate, and the cover are each made of a crystalline resin at least in portions exposed to the atmosphere.

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