JP7400129B2 - Air conditioner indoor unit - Google Patents

Description

Embodiments of the present invention relate to an indoor unit of an air conditioner.

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

The temperature of the indoor space to be air-conditioned is adjusted to the optimum temperature by the airflow (hereinafter referred to as blowout air) blown out from the air outlet. In order to comfortably air-condition the indoor space, it is preferable to blow the blown air more strongly in a desired direction. For example, a structure in which a movable louver is installed at the outlet to change the direction of the air outlet is known, but as the inclination angle of the louver increases, the opening area of the outlet becomes narrower, and the volume of the outlet air decreases. tends to decline.

International Publication No. 2019/078067

The problem to be solved by the present invention is to provide an indoor unit that can suppress a decrease in the volume of the blown air and blow out the blown air in a desired direction.

According to the embodiment, the indoor unit of the air conditioner includes a heat exchanger, a control section, a housing, a fan, an outlet unit, and an attachment. A lead wire is connected to the control section. The housing accommodates the heat exchanger and the control unit, and has an opening facing the heat exchanger. The fan generates a flow of air that has undergone heat exchange with the heat exchanger. The air outlet unit includes a first inlet into which the airflow generated by the fan flows, a first air outlet that blows out the airflow into an indoor space, and a first airflow outlet from the first inlet to the first airflow outlet. and a first air path through which the airflow passes. The attachment is removably interposed between the housing and the air outlet unit so that the axial direction of the first air outlet is inclined with respect to the axial direction of the opening. The attachment has a main body and a cover. The main body portion includes a second inlet that communicates with the opening, a second outlet that communicates with the first inlet, and changes the direction of the airflow that has flowed in from the second inlet. and a second air path leading to the second air outlet. The cover portion is disposed apart from the second air path, forms a wiring space in which the lead wire is wired, and covers the wiring space. The casing has a wiring port for connecting the lead wire wired in the wiring space to the control unit. The cover portion covers the wiring opening as well as the wiring space.

FIG. 1 is a schematic perspective view of an indoor unit according to an embodiment. FIG. 2 is a schematic front view of an indoor unit according to an embodiment, viewed from the front. FIG. 2 is a schematic side view of an indoor unit according to an embodiment, viewed from the right side. 1 is a perspective view schematically showing a state in which an indoor unit according to an embodiment is disassembled into its main components; FIG. FIG. 3 is a schematic cross-sectional view of the indoor unit taken along line A5-A5 in FIGS. 1 and 2. FIG.

One 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. This indoor unit 1 is connected to an outdoor unit including a compressor for compressing refrigerant, an outdoor heat exchanger, and the like through refrigerant piping. The indoor unit 1, the outdoor unit, refrigerant piping, and the like constitute an air conditioner equipped with a refrigeration cycle. An air conditioner can switch between cooling operation and heating operation, for example. However, the air conditioner may be capable of only performing cooling operation or heating operation.

In this embodiment, the X direction, Y direction, and Z direction are defined as shown in FIG. These X direction, Y direction, and Z direction are orthogonal to each other. In the following description, as an example, the X direction is defined as the right, the opposite direction is defined as the left, the Y direction is defined as the front, the opposite direction is defined as the back, the Z direction is defined as the top, and the opposite direction is defined as the bottom. According to this, FIG. 2 is a schematic front view of the indoor unit 1 seen from the front. FIG. 3 is a schematic side view of the indoor unit 1 seen from the right side. FIG. 4 is a perspective view schematically showing a state in which the indoor unit 1 is disassembled into its main components. FIG. 5 is a schematic cross-sectional view of the indoor unit 1 taken along line A5-A5 in FIGS. 1 and 2.

As shown in FIGS. 1 to 5, the indoor unit 1 includes a housing 2, an attachment 3, and an air outlet unit 4. The attachment 3 is detachably interposed between the housing 2 and the outlet unit 4.

The housing 2 includes a front plate 20, a front cover 21 disposed above the front plate 20, a back plate 22 facing the front plate 20 and the front cover 21, and 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 it may be installed in multiple stages stacked in the Z direction by connecting the back plate 22 to a frame placed along a pillar or wall of a building, for example. may be done. Further, the plurality of indoor units 1 may be arranged in the X direction, or may be installed at positions separated from each other in the Z direction or the X direction.

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

As mainly shown in FIGS. 4 and 5, the housing 2 has an opening 29 at the front. The opening 29 is formed between the front plate 20 and the front cover 21 so as to face a heat exchanger 6, which will be described later, in the Y direction. The opening 29 is open parallel to the XZ plane. Further, the front cover 21 has a notch 21a having an edge curved at a predetermined curvature. The cutout 21a is an opening (wiring port) that is continuous with the opening 29, and is arranged so that a part of the space above the partition plate 71 (space S1 for accommodating the control unit 8), which will be described later, can be exposed to the front. ing.

A frame 300 for removably attaching an attachment 3 to the housing 2, which will be described later, is attached to the front of the opening 29. The front cover 21 is attached to a first frame 310 of the frame 300 with screws 211. At this time, the screw-fastening locations of the first frame 310 overlap with the rear side (back side) of the front cover 21. Further, at this time, the claws 318 and 319 provided on the first frame 310 are hooked on the locking portion 20a of the front plate 20 of the housing 2 and the locking portion (not shown) of the partition plate 71. Thereby, by removing the screws 211, the front cover 21 can be attached to and detached from other parts of the housing 2 (details will be described later).

As shown in FIG. 5, a heat exchanger 6 is arranged inside the housing 2. The heat exchanger 6 includes a plurality of heat exchanger tubes 60 extending in the X direction and a plurality of fins 61 connected to the heat exchanger tubes 60. As shown in FIG. 5, the plurality of fins 61 have an elongated shape in the Z direction and are lined up at intervals in the X direction.

As shown in FIGS. 3 and 5, the back plate 22 is provided with connection ports 62 and 63 for refrigerant piping for connection to the outdoor unit, and a suction port 27 facing the heat exchanger 6. For example, the connection port 62 is connected to an inlet of a flow path formed by each heat transfer tube 60, and the connection port 63 is connected to an outlet of the flow path. Further, an expansion valve (not shown) is connected to the heat exchanger 6 and functions to adjust the pressure inside the heat exchanger 6.

A drain pan 64 is arranged below the heat exchanger 6 to receive condensed water generated in the heat exchanger 6. The condensed water accumulated in the drain pan 64 is discharged to the outside of the housing 2 through the drain pipe 65.

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 back 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 66 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 a single plate into an L-shape, or may be separate plates. A space S1 for accommodating the control unit 8 is formed by the mounting plate 70, the partition plate 71, the front cover 21, and the top plate 26.

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 control unit 8 includes a remote controller installed outside the indoor unit 1, a communication line and a power line for communicating with the outdoor unit, other indoor units, etc., and a fan motor 90 of the fan 9 and the drive of the louver 5, which will be described later. Lead wires 11a and 11b of a motor etc. are connected.

As mainly shown in FIGS. 4 and 5, the air outlet unit 4 is a component for blowing out the airflow that has been heat exchanged by the heat exchanger 6 in the indoor unit 1 into the indoor space, and is located at the frontmost part of the indoor unit 1. corresponds to the section. The air outlet unit 4 includes a first inlet 4a through which the airflow flows, a first outlet 4b which blows out the airflow that has flowed in from the first inlet 4a into the indoor space, and a first airflow outlet 4a through which the airflow flows into the room. It has a first air path 4c through which airflow passes up to the first air outlet 4b. The temperature of the indoor space is adjusted to the optimum temperature by the air (airflow) blown out from the first outlet 4b of the outlet unit 4.

The outlet unit 4 includes a cylindrical cover (hereinafter referred to as an outlet cover) 40 that tapers from the first inlet 4a side to the first outlet 4b side. The air outlet cover 40 covers the outer circumferential surfaces of a first cylindrical member 92 and a second cylindrical member 72, which will be described later, and covers the constituent members of the air outlet unit 4 (a rectifying plate 94, a first cylindrical member 92, and the like, which will be described later). second cylindrical member 72, etc.), and improves the design of the exterior. As shown in FIGS. 1 and 2, the outlet cover 40 is attached to a plate-shaped panel portion 44 of a first cylindrical member 92, which will be described later, with screws 41. In the example shown in FIG. 1, a recess 42 is provided on the outer circumferential surface of the outlet cover 40, and a screw 41 is passed through a through hole formed in the end surface of the recess 42 on the panel portion 44 side.

The air outlet unit 4 further includes a louver 5 provided at the first air outlet 4b. In the example shown in FIG. 1, the louver 5 is composed of four rotatable wind direction plates 51, 52, 53, and 54. The number of wind direction plates is not limited to four, and the louver 5 may be configured with three or less or five or more wind direction plates. The wind direction plates 51, 52, 53, and 54 adjust the inclination of the airflow blown out from the first outlet 4b.

The air outlet unit 4 has a built-in fan 9. As shown in FIG. 5, the fan 9 is arranged inside the air outlet cover 40. The fan 9 exchanges heat with the heat exchanger 6 to generate a flow of temperature-controlled air. The fan 9 is, for example, an axial fan, and includes a fan motor 90 and a plurality of blades 91 that are rotated by the fan motor 90 around an axis AS. However, the fan is not an axial fan like the illustrated example, but may be any other type of fan such as a sirocco fan.

The axis AS, that is, the rotation center axis of the fan motor 90, is inclined at a predetermined angle (inclination angle θ1) with respect to the XY plane (reference line AB shown by a broken line in FIG. 5). The inclination angle θ1 is the angle between the axis AS and the reference line AB. In the example shown in FIG. 5, the XY plane is a plane parallel to the horizontal plane, and the reference line AB is an arbitrary virtual line on the XY plane, which is in the axial direction of the central axis of the opening 29 of the housing 2. They are parallel imaginary lines. The inclination angle θ1 may be set to an angle suitable for adjusting the temperature of the indoor space to a desired temperature by the airflow blown out from the first air outlet 4b. The inclination angle θ1 is within a range of about 10° to 50°, and in the example shown in FIG. 5, the inclination angle θ1 is set to 40°. Assuming that the XY plane is a horizontal plane, the axis AS, or simply the outlet unit 4, is arranged at an angle of 40 degrees downward with respect to the horizontal plane. Therefore, in the outlet unit 4, the temperature-controlled airflow passes through the first air path 4c in this direction.

The fan 9 is arranged inside a first cylindrical member 92 coaxial with the axis AS. The first cylindrical member 92 has an opening that defines the first inlet 4a inside the outlet cover 40, and a cylindrical portion that defines the upstream portion of the first air path 4c. At least a portion of the outer peripheral surface of the first cylindrical member 92 is covered with a heat insulating material 93.

The second cylindrical member 72 has a cylindrical portion that defines the downstream portion of the first air passage 4c, and has an opening that defines the first air outlet 4b. It is arranged coaxially with the axis AS. At least a portion of the outer peripheral surface 72a of the second cylindrical member 72 is covered with a heat insulating material 73. In the example shown in FIG. 5, the centers of the first cylindrical member 92 and the second cylindrical member 72, in other words, the first inlet 4a, the first air passage 4c, and the first outlet 4b are Both exist on the axis AS (each central axis line coincides with the axis AS).

A current plate 94 is arranged between the first cylindrical member 92 and the second cylindrical member 72. The baffle plate 94 is supported by the first cylindrical member 92, and straightens the disturbed airflow immediately after being generated by the fan 9 so as to be substantially parallel to the axis AS. The current 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 72, and the current plate 94 are included in the constituent members of the air outlet unit 4.

As mainly shown in FIGS. 4 and 5, the louver 5 is disposed at the end of the second cylindrical member 72, specifically at the first air outlet 4b. The wind direction plates 51, 52, 53, and 54 of the louver 5 are rotated by a louver drive mechanism (hereinafter referred to as a louver drive mechanism) 74 including, for example, a drive motor. However, the wind direction plates 51, 52, 53, and 54 may be manually rotatable.

A louver drive mechanism 74 is provided on the outer peripheral surface 72a of the second cylindrical member 72. The louver drive mechanism 74 includes a gear etc. for changing the angle of the wind direction plates 51, 52, 53, 54 by the driving force of a drive motor (not shown), and moves the wind direction plates 51, 52, 53, 54 at a predetermined inclination. Rotate it.

The louver 5, the second cylindrical member 72, the heat insulating material 73, and the louver drive mechanism 74 constitute the rotation unit 7. The rotation unit 7 is a portion of the outlet unit 4 that can rotate relative to the first cylindrical member 92 about the axis AS, and is held by the first cylindrical member 92 by the holding mechanism 10.

Specifically, the holding mechanism 10 connects the second cylindrical member 72 to the first cylindrical member 92 so that the two can rotate. The holding mechanism 10 includes, for example, an annular gear provided on the first inlet 4a side of the second cylindrical member 72, and the second cylindrical member 72 is moved by sending this gear in the circumferential direction around the axis AS using a motor. The cylindrical member 72 is rotated relative to the first cylindrical member 92. However, the second cylindrical member 72 may be manually rotatable. In this case, for example, the second cylindrical member 72 can be rotated relative to the first cylindrical member 92 by arranging three gears at equal intervals in the circumferential direction around the axis AS and meshing the gears. You can support it.

The control unit 8 controls the rotation speed of the fan 9 based on information inputted from the outside, the intake temperature of outside air, the blowout temperature of the airflow, etc. detected by a temperature sensor included in the indoor unit 1 . Further, the control unit 8 controls the operation of the holding mechanism 10 and the louvers 5 based on wind direction setting information input from the outside. By rotating the rotating unit 7 using the holding mechanism 10 and changing the angles of the wind direction plates 51, 52, 53, and 54 of the louver 5, air can be blown in various directions.

In addition to changing the air blowing direction as described above, in this embodiment, the attachment 3 is interposed between the housing 2 and the air outlet unit 4, so that the air blowing direction (airflow direction) can be changed. . The structure of the attachment 3 will be explained below.

As shown in FIGS. 1 to 5, the attachment 3 is a component interposed between the casing 2 and the air outlet unit 4 in the indoor unit 1, and corresponds to an intermediate portion of the indoor unit 1. Thereby, the attachment 3 changes the direction of the airflow of the air heat-exchanged by the heat exchanger 6 in the housing 2 and guides it to the outlet unit 4 .

The attachment 3 has a second inlet 3a that communicates with the opening 29 of the housing 2, a second outlet 3b that communicates with the first inlet 4a of the outlet unit 4, and a second inlet 3a that communicates with the opening 29 of the housing 2. It has a second air path 3c that changes the direction of the inflowing airflow and guides it to the second air outlet 3b.

Like the opening 29, the second inlet 3a opens parallel to the XZ plane and communicates with the opening 29. On the other hand, the second air outlet 3b opens to the second inlet 3a, which is inclined forward with respect to the XZ plane, in other words, inclined downward with respect to the XY plane. are doing. In this embodiment, as shown in FIG. 5, the second air outlet 3b is inclined at a predetermined inclination angle θ2 with respect to the XZ plane. The inclination angle θ2 coincides with the inclination angle θ1 of the axis AS (rotation center axis of the fan motor 90) with respect to the XY plane (reference line AB shown by a broken line in FIG. 5). As described above, the inclination angle θ1 is set within a range of approximately 10° to 50°, and in the example shown in FIG. 5, it is set to 40°, and the inclination angle θ2 is also set accordingly. That is, the second air outlet 3b tilts the airflow guided by the second air path 3c downward by an inclination angle θ1 with respect to the XY plane (reference line AB), and It is made to flow into the inlet 4a.

The centers of the first inlet 4a and the first outlet 4b both exist on the axis AS, and their central axes coincide with the axis AS. Therefore, the attachment 3 is interposed between the housing 2 and the air outlet unit 4 such that the axial direction of the first air outlet 4b is inclined with respect to the axial direction (reference line AB) of the opening 29 of the housing 2. are doing.

Further, as shown in FIGS. 1 to 5, the attachment 3 includes a main body portion 31 and a cover portion 32. As shown in FIGS. The main body portion 31 and the cover portion 32 are formed by processing a nonflammable material, for example, a metal plate such as iron. However, the material is not limited to this.

As mainly shown in FIGS. 4 and 5, the main body part 31 is a main body part that contributes to changing the direction of airflow in the attachment 3, and includes a second inlet 3a, a second outlet 3b, and a second air outlet. It is configured to include a path 3c. The main body portion 31 has first to sixth main body wall portions 31a to 31f, and these main body wall portions 31a to 31f provide a second inlet 3a, a second outlet 3b, and a second air path 3c. form.

The first body wall portion 31a and the second body wall portion 31b are portions parallel to the XY plane, that is, surface portions extending parallel to the top plate 26 and bottom plate 25 of the housing 2. The third main body wall 31c and the fourth main body wall 31d are portions parallel to the YZ plane, that is, surface portions extending parallel to the side plates 23 and 24 of the housing 2. The first main body wall 31a and the second main body wall 31b, the third main body wall 31c and the fourth main body wall 31d are continuous at approximately right angles, and the sides along the Y direction Sections 31g and 31h are formed.

The fifth main body wall 31e is a surface portion that extends continuously from the first main body wall 31a, the third main body wall 31c, and the fourth main body wall 31d. The fifth main body wall 31e is inclined downward with respect to the first main body wall 31a. In this embodiment, the fifth main body wall 31e is inclined at a predetermined inclination angle θ3 with respect to the first main body wall 31a. The inclination angle θ3 matches the inclination angle θ2 of the second outlet 3b with respect to the XZ plane (that is, the second inlet 3a), in other words, the inclination angle θ1 of the axis AS with respect to the XY plane. As described above, the inclination angles θ1 and θ2 are set within a range of approximately 10° to 50°, and in the example shown in FIG. 5, 40°, and the inclination angle θ3 is also set accordingly. Further, the fifth main body wall 31e is continuous with the third main body wall 31c and the fourth main body wall 31d, respectively, at a substantially right angle, and has an inclination angle θ3 with respect to the first main body wall 31a. An inclined side portion 31i is formed.

The sixth main body wall portion 31f is a surface portion that extends continuously from the second main body wall portion 31b, the third main body wall portion 31c, and the fourth main body wall portion 31d. The sixth main body wall portion 31f is inclined forward with respect to the XZ plane. In this embodiment, the sixth main body wall 31f is inclined at a predetermined inclination angle θ2 with respect to the XZ plane, that is, the second inlet 3a. Further, the sixth main body wall 31f is continuous with the third main body wall 31c and the fourth main body wall 31d, respectively, at a substantially right angle, and is inclined at an inclination angle θ2 with respect to the second inlet 3a. A side portion 31j is formed.

As a result, the opening defined by each end of the first body wall 31a, the second body wall 31b, the third body wall 31c, and the fourth body wall 31d is It forms the second inlet 3a. The opening defined by each end of the third main body wall 31c, the fourth main body wall 31d, the fifth main body wall 31e, and the sixth main body wall 31f is defined by the second It forms the air outlet 3b. Further, the sixth main body wall portion 31f is parallel to the second air outlet 3b. The space defined by the first to sixth main body walls 31a to 31f forms a second air path 3c. Therefore, the second air path 3c guides the airflow that has entered the second inlet 3a along the reference line AB, and then changes the direction along the axis AS and guides it to the second outlet 3b. .

A heat insulating material 33 is arranged in the internal space of the main body part 31, that is, in the second air passage 3c. As shown in FIGS. 4 and 5, the heat insulating material 33 is arranged along the inner walls of the first to sixth main body wall portions 31a to 31f. Thereby, heat transfer between the internal space of the main body part 31 (second air path 3c) and its vicinity, for example, the internal space of the cover part 32 (wiring space 34 described later) is suppressed. At each end of the third main body wall 31c, the fourth main body wall 31d, and the fifth main body wall 31e, a receiving portion 31k for the heat insulating material 33 is provided so as to protrude into the second air outlet 3b. is provided.

The cover part 32 is a part that forms a wiring space 34 for wiring the lead wires 11a and 11b in the attachment 3. The cover part 32 is arranged apart from the second air path 3c and covers the wiring space 34. Lead wires 11a and 11b are wired in the wiring space 34 to connect the control unit 8 with the fan motor 90 of the fan 9, the drive motor of the louver 5, and the like. That is, the lead wires 11a and 11b can be wired without passing through the second air path 3c and without being exposed to the airflow (cold airflow or warm airflow) guided by the second airflow path 3c. The number of lead wires 11a and 11b to be wired is not particularly limited.

The cover portion 32 has first to sixth cover wall portions 32a to 32f, and a wiring space 34 is formed by these cover wall portions 32a to 32f.

The first cover wall portion 32a is a portion parallel to the XY plane, that is, a surface portion extending parallel to the first main body wall portion 31a and the top plate 26 of the housing 2. The second cover wall portion 32b is a portion parallel to the XZ plane, that is, a surface portion extending parallel to the second inlet 3a and the front cover 21 of the casing 2. The third cover wall 32c and the fourth cover wall 32d are parts parallel to the YZ plane, that is, the third main body wall 31c, the fourth main body wall 31d, and the side plate of the housing 2. This is a surface portion extending parallel to 23 and 24. The first cover wall portion 32a, the third cover wall portion 32c, and the fourth cover wall portion 32d are each continuous at a substantially right angle, and form a side portion 32g along the Y direction.

The fifth cover wall portion 32e is a surface portion that extends continuously from the first cover wall portion 32a, the third cover wall portion 32c, and the fourth cover wall portion 32d. The fifth cover wall 32e is inclined downward with respect to the first cover wall 32a. In this embodiment, the fifth cover wall portion 32e is inclined at a predetermined inclination angle θ4 with respect to the first cover wall portion 32a. The inclination angle θ4 matches the inclination angle θ3, that is, both the inclination angles θ1 and θ2. As mentioned above, the inclination angles θ1, θ2, and θ3 are set within the range of about 10° to 50°, and in the example shown in FIG. 5, 40°, and the inclination angle θ4 is also set accordingly. . That is, the fifth cover wall portion 32e is a surface portion that extends parallel to the fifth main body wall portion 31e. Further, the fifth cover wall portion 32e is continuous with the third cover wall portion 32c and the fourth cover wall portion 32d, respectively, at a substantially right angle, and has an inclination angle of θ3 with respect to the first cover wall portion 31a. An inclined side portion 32h is formed.

The sixth cover wall portion 32f is a surface portion that extends continuously from the third cover wall portion 32c, the fourth cover wall portion 32d, and the fifth cover wall portion 32e. The sixth cover wall 32f is inclined downward with respect to the fifth cover wall 32e. In this embodiment, the sixth cover wall portion 32f is inclined at a predetermined inclination angle θ2 with respect to the XZ plane, that is, the second inlet 3a. That is, the sixth cover wall portion 32f is a surface portion that extends parallel to the sixth main body wall portion 31f and the second air outlet 3b. Further, the sixth cover wall 32f is continuous with the third cover wall 32c, the fourth cover wall 32d, and the fifth cover wall 32e at a substantially right angle, and is connected to the second inlet 3a. A side portion 32i is formed which is inclined at an inclination angle θ2 relative to the other side. The sixth cover wall portion 32f has a notch 32j having an edge curved with a curvature along the outer periphery of the outlet cover 40. The lead wires 11a and 11b are drawn out into the wiring space 34 from the notch 32j.

The cover part 32 is arranged such that the first cover wall part 32a faces the first main body wall part 31a, and the fifth cover wall part 32e faces the fifth main body wall part 31e, with a predetermined interval between them. It is arranged at the upper part of the main body part 31. In this state, the lower part of the third cover wall 32c is covered with the third main body wall 31c, and the lower part of the fourth cover wall 32d is covered with the fourth main body wall 31d. There is. Thereby, the first cover wall 32a, the third cover wall 32c, the fourth cover wall 32d, the fifth cover wall 32e, and the sixth cover wall 32f, and the A space formed between the first main body wall 31a and the fifth cover wall 32e forms a wiring space 34 separated from the second air path 3c. In other words, the cover portion 32 has a structure that is entirely open at the bottom and rear, and forms a space portion opened at the front by the notch 32j. The first main body wall 31a and the fifth main body wall 31e serve as partition walls that separate the second air passage 3c from the wiring space 34. The lead wires 11a and 11b drawn out from the notch 32j are wired in the wiring space 34 so as to run over the first main body wall 31a and the fifth main body wall 31e.

An air outlet unit 4 is attached to the attachment 3 so as to communicate the second air outlet 3b with the first inlet 4a. For example, in a state where the claw portion 43 provided on the outlet unit 4 is hooked on the fifth main body wall portion 31e of the main body portion 31 and the locking portion 31l of the receiving portion 31k, the sixth cover wall of the cover portion 32 It is fixed to the portion 32f with a screw 45 (see FIGS. 1 and 2). The claw portion 43 is provided on a panel portion 44 that extends from the periphery of the first inlet 4 a of the first cylindrical member 92 . The panel portion 44 and the sixth cover wall portion 32f have holes 44a and 32k into which screws 45 are screwed. The hole 44a is formed at the edge of the panel portion 44, which is curved with a curvature along the edge of the notch 32j of the sixth cover wall portion 32f.

In this embodiment, the attachment 3 is detachably attached to the housing 2 via an attachment frame 300. The frame 300 includes a first frame 310 and a second frame 320. In FIG. 5, the first frame 310 and the second frame 320 are separated, but these frames 310 and 320 may be integrated in advance by, for example, welding.

The first frame 310 is a member that constitutes the rear part of the frame 300, and includes a frame 311 arranged to surround the opening 29 of the casing 2, and four parts that stand up forward from the edge of the frame 311. It has two standing parts 312 and a fixing part 313 provided at the top of the frame part 311. The frame portion 311 is a portion parallel to the XZ plane, and is a surface portion that extends parallel to the front plate 20 and the front cover 21. The upright portion 312 is a portion parallel to the XY plane or the YZ plane, and is a surface portion that extends parallel to the bottom plate 25, the top plate 26, and the side plates 23 and 24. The fixing portion 313 is a portion parallel to the XZ plane and a surface portion extending parallel to the front cover 21. The fixing part 313 protrudes upward from the upper part of the frame part 311 so as to have a curved edge along the edge of the notch 21a of the front cover 21. The fixed part 313 has a wiring port 314 for wiring the lead wires 11a and 11b. The wiring port 314 is a through hole formed at a position that can communicate with the notch 21a. A ring member 330 is provided around the wiring port 314 to suppress flapping of the lead wires 11a and 11b wired to the wiring port 314. The ring member 330 appropriately narrows the diameter of the wiring port 314 in accordance with the outer diameter of the lead wires 11a and 11b or the outer diameter of a plurality of bundles. Note that the number of wiring ports 314 is not particularly limited, and may be one, three or more. In the example shown in FIG. 4, two wiring ports 314 are provided, and the lead wire 11a and the lead wire 11b can be separated into separate wiring ports 314 and wired.

The second frame 320 is a member that constitutes the front part of the frame 300, and is integrated with the first frame 310 by being inserted inside the four upright parts 312 of the first frame 310. has been done. The second frame 320 is provided with a heat insulating material 321 and a sealing material 322. The heat insulating material 321 is arranged along the inner side of the second frame 320. The sealing material 322 is placed in front of the heat insulating material 321, which is placed near the continuous portion of the second main body wall 31b and the sixth main body wall 31f, and is designed to make the second air passage 3c airtight. ing.

The attachment 3 is attached to a first frame 310 of the frame 300. Specifically, the main body portion 31 is attached to the frame portion 311 and the cover portion 32 is attached to the fixed portion 313. For example, the main body 31 includes peripheral edges of the second inlet 3a in the first main body wall 31a, the second main body wall 31b, the third main body wall 31c, and the fourth main body wall 31d. is positioned so as to cover the upright portion 312, and is fixed with screws 35. The first to fourth main body wall portions 31a to 31d and the upright portion 312 have holes 36, 315 into which the screws 35 are screwed. Although FIGS. 1, 3, and 4 show a state in which only one hole is screwed, all or some of the other holes 36, 315 are also screwed. Further, the cover section 32 is positioned such that the second cover wall section 32b overlaps the front side of the fixing section 313, and is fixed with screws 37. The second cover wall portion 32b and the fixing portion 313 have holes 38, 316 into which the screws 37 are screwed. As a result, the main body 31 and the cover 32 are assembled together, and the attachment 3 (the main body 31, the cover 32) and the frame 300 (the first frame 310, the second frame 320) are assembled together. It is now assembled into one piece.

As mainly shown in FIGS. 4 and 5, the attachment 3 and the frame 300 are attached to the housing 2. For example, the attachment 3 and the frame 300 are positioned so as to cover the opening 29 of the housing 2 and are fixed with screws 211. At this time, the fixing part 313 is positioned on the back side (back side) of the front cover 21 so as to cover the notch 21a. The fixing portion 313 and the front cover 21 have holes 317 and 21b into which the screws 211 are screwed. The hole 317 of the fixing part 313 is overlapped with the rear side (back side) of the hole 21b of the front cover 21. Furthermore, when screwed in this manner, the claws 318 and 319 provided on the first frame 310 engage the locking portion 20a of the front plate 20 of the housing 2 and the locking portion of the partition plate 71 (not shown). ). Thereby, the attachment 3 and the frame 300 are temporarily fixed to the housing 2, and workability is improved.

When attached to the housing 2 together with the frame 300, the attachment 3 has the second inflow port 3a communicating with the opening 29, and the wiring space 34 is a space for accommodating the control unit 8 through the wiring port 314. It will be in a state where it communicates with S1. At this time, the cover portion 32 is positioned so as to cover the wiring space 34, the wiring port 314, and the notch 21a. In other words, the cover part 32 is assembled to the main body part 31 so that it can be separated from the main body part 31 and open the wiring space 34, the wiring port 314, and the notch 21a to the outside.

In this way, according to the indoor unit 1 of the present embodiment, the attachment 3 is interposed between the housing 2 and the air outlet unit 4, so that the airflow blown out from the first air outlet 4b of the air outlet unit 4 is improved. The direction of the can be changed using the attachment 3.

In the attachment 3, the second air outlet 3b that communicates with the first inlet 4a of the air outlet unit 4 is tilted forward with respect to the second inlet 3a that communicates with the opening 29 of the housing 2. Then, it is inclined downward by an inclination angle θ1 with respect to the XY plane (reference line AB shown by a broken line in FIG. 5). Therefore, the second air outlet 3b directs the airflow guided by the second air path 3c downward at an inclination angle θ1 with respect to the XY plane (reference line AB) and directs it to the first inlet 4a. can be allowed to flow in.

In this embodiment, the direction of the airflow blown out from the first air outlet 4b can be changed according to the angles of the wind direction plates 51, 52, 53, and 54 of the louver 5, as in the conventional case. However, as the inclination angle of the wind direction plates 51, 52, 53, and 54 increases, the opening area of the first air outlet 4b becomes narrower, and the volume of the airflow (blowout air) tends to decrease. On the other hand, in this embodiment, in addition to being able to change the direction of the airflow by the inclination of the wind direction plates 51, 52, 53, and 54, the direction of the airflow can also be changed by the attachment 3 as described above. According to the second air passage 3c of the attachment 3, after guiding the airflow that has flowed into the second inlet 3a along the reference line AB, the direction is changed along the axis AS and the airflow is directed to the second air outlet 3b. can lead you to. That is, the second air passage 3c itself heading toward the second air outlet 3b can be tilted downward by the inclination angle θ1 with respect to the reference line AB. For this reason, the airflow whose direction is tilted flows into the first inlet 4a from the second outlet 3b, passes through the first air passage 4c with the same direction, and is blown out from the first outlet 4b. can be done. Therefore, it becomes possible to change the direction of airflow without narrowing the opening area of the first air outlet 4b using the wind direction plates 51, 52, 53, and 54. Thereby, the airflow can be blown more strongly in a desired direction without reducing the volume of the temperature-controlled airflow (blowout air) blown out from the first air outlet 4b. As a result, it becomes easier to adjust the temperature of the indoor space to be air-conditioned to the optimum temperature.

Furthermore, in this embodiment, since the fan 9 is built into the air outlet unit 4, the structure of the attachment 3 can be simplified and the fan 9 can be placed close to the first air outlet 4b. Therefore, the blown air can be blown more strongly in the desired direction without reducing the volume of the blown air.

For example, when air-conditioning an indoor space with many users, such as a station premises where an unspecified number of passengers come and go, in order to prevent accidental operation, the indoor space should be placed in a high place that cannot be touched by these users. Unit 1 may be installed. According to the present embodiment, even when the indoor unit 1 is installed at a high place, the blowing air can be blown more strongly toward users such as passengers (blowing down) without reducing the air volume. )Is possible. Therefore, the temperature of spaces such as station premises can be efficiently adjusted to a comfortable state.

Further, the attachment 3 includes a main body part 31 that contributes to changing the direction of airflow, and a cover part 32 that forms a wiring space 34 for wiring the lead wires 11a and 11b. The cover part 32 is arranged apart from the second air path 3c and covers the wiring space 34. Therefore, the lead wires 11a and 11b can be wired into the wiring space 34 covered by the cover portion 32 without passing through the second air path 3c. Therefore, the lead wires 11a and 11b can be wired without being exposed to the airflow (cold airflow or warm airflow) guided by the second air path 3c. Thereby, for example, it is easy to maintain the atmosphere of the lead wires 11a, 11b appropriately, and damage to the lead wires 11a, 11b can be suppressed.

In addition, each area where the lead wires 11a and 11b are wired, specifically, the wiring space 34, the wiring port 314, and the notch 21a, are all covered by the cover part 32 and are not visible from the outside. It is said that Therefore, the lead wires 11a and 11b are not exposed to the outside during normal times, so that the lead wires 11a and 11b can be protected and the design of the exterior of the indoor unit 1 can be improved.
Although the present embodiment has been described with respect to the case where the inclination angle θ3 of the fifth main body wall portion 31e and the inclination angle θ4 of the fifth cover portion 32e are the same, the present invention is not limited to this. The inclination angles θ3 and θ4 may be made to be different from each other as appropriate, taking into consideration the design, the volume of the wiring space 34, the thickness and shape of the heat insulating material 33, the state of airflow formation, and the like. Moreover, instead of providing an inclination angle by bending, it may be formed into an arc shape by bending.

The cover part 32 can be removed from the main body part 31 by removing the screws 45 and 37. That is, it is possible to remove only the cover portion 32 from the indoor unit 1. Further, by removing the cover portion 32, the front cover 21 of the housing 2 can be removed from the indoor unit 1. Therefore, by removing the cover part 32 and the front cover 21, the space S1 for accommodating the control part 8 can be opened to the outside, to the front in this embodiment. Therefore, the space S1 can be easily accessed from the front during work such as installation and maintenance of the indoor unit 1, and it is possible to improve work efficiency in setting, repairing, replacing, etc. the control board 80 and various electronic components 81. can. Moreover, after installation or maintenance, the front cover 21 and the cover part 32 can be easily attached by tightening the screws in the reverse order of the removal procedure.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

In this embodiment, the attachment 3 is configured and arranged so that the temperature-controlled airflow (blowout air) is blown downward from the first air outlet 4b, and more specifically from the second air outlet 3b. There is. The direction in which the air is blown out, that is, the direction in which the second air path 3c guides the airflow, is not limited to the downward direction, but may be any direction (direction) such as upward, horizontal (left and right), and the like.

Further, in this embodiment, the fan 9 and the rectifying plate 94 are arranged in the air outlet unit 4, but these are arranged in the second air passage 3c of the main body part 31 of the attachment 3 or in the housing 2, for example. You can leave it there.

Furthermore, in this embodiment, the main body 31 of the attachment 3 is configured as a separate part (separate unit) from the air outlet unit 4, but these are the same part (same unit) and have an integrated structure. Good too.

1... Indoor unit, 2... Housing, 3... Attachment, 3a... Second inlet, 3b... Second outlet, 3c... Second air path, 4... Outlet unit, 4a... First flow Inlet, 4b...first air outlet, 4c...first air path, 5...louver, 6...heat exchanger, 7...rotation unit, 72...second cylindrical member, 74...louver drive mechanism, 8... Control unit, 9... Fan, 10... Holding mechanism, 11a, 11b... Lead wire, 21... Front cover, 21a... Notch, 29... Opening, 211... Screw, 31... Main body part, 31a... First main body wall part , 31b...Second main body wall, 31c...Third main body wall, 31d...Fourth main body wall, 31e...Fifth main body wall, 31f...Sixth main body wall, 31g, 31h, 31i, 31j...side part, 31k...receiving part, 31l...locking part, 32...cover part, 32a...first cover wall part, 32b...second cover wall part, 32c...third cover wall part, 32d... Fourth cover wall part, 32e... Fifth cover wall part, 32f... Sixth cover wall part, 32g, 32h, 32i... Side part, 32j... Notch, 32k... Hole, 34... Wiring space, 40... Air outlet cover, 71... Partition plate, 80... Control board, 81... Electronic component, 90... Fan motor, 300... Frame body, 310... First frame body, 311... Frame part, 312... Standing part, 313 ...fixing part, 314...wiring port, 320...second frame, 330...ring member, AS...shaft, AB...reference line, S1...space (accommodating space for control unit), θ1, θ2, θ3, θ4... Tilt angle.

Claims (3)

a heat exchanger;
a control unit to which lead wires are connected;
a casing that houses the heat exchanger and the control unit and has an opening facing the heat exchanger;
a fan that generates an airflow of the air heat exchanged in the heat exchanger;
a first inlet into which the airflow generated by the fan flows; a first outlet which blows out the airflow into an indoor space; and a first outlet through which the airflow passes from the first inlet to the first outlet. an air outlet unit having a first air path;
an attachment detachably interposed between the housing and the air outlet unit so that the axial direction of the first air outlet is inclined with respect to the axial direction of the opening ;
The attachment is
a second inlet that communicates with the opening; a second outlet that communicates with the first inlet; and a second outlet that changes the direction of the airflow that has flowed in from the second inlet. a main body portion including a second air path leading to the
a cover part disposed apart from the second air path and forming a wiring space in which the lead wire is wired, and covering the wiring space;
The casing has a wiring port for connecting the lead wire wired in the wiring space to the control unit,
The cover part covers the wiring opening as well as the wiring space.
Indoor unit of air conditioner. The indoor unit of an air conditioner according to claim 1 , wherein the cover part is assembled to the main body part so that it can be separated from the main body part and open the wiring space to the outside. The indoor unit of an air conditioner according to claim 1 or 2, wherein the fan is built in the air outlet unit.

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