JP7161668B2 - Ceiling-mounted air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ceiling-mounted air conditioner, and more particularly to the structure of an indoor unit.

In a ceiling-mounted air conditioner, an outdoor unit installed outdoors and an indoor unit installed above the ceiling of an air-conditioned room are connected by gas pipes and liquid pipes to form a refrigerant circuit. The indoor unit has a box-shaped main unit embedded in the ceiling, and a decorative panel arranged on the ceiling on the side of the air conditioning room and attached to the main unit.

As an example, in the invention described in Patent Document 1, a main unit is provided with a U-shaped heat exchanger, a fan casing in the center of the heat exchanger, and a sirocco fan surrounded by the fan casing. ing. The decorative panel has an air outlet in the center and an air inlet along the three lower sides of the heat exchanger.

Then, the air sucked from the suction port can be heat-exchanged with the refrigerant by the heat exchanger and blown out in one direction from the blow-out port. By surrounding the fan with a heat exchanger, the distance between the fan and the surface of the heat exchanger becomes almost constant, and the air velocity and volume of the air passing through the heat exchanger are less uneven, making the heat exchanger more effective. can be used to increase the heat exchange capacity.

JP-A-2000-213767

By the way, as an example for blowing out conditioned air in various directions, the air blowing portion of the decorative panel is attached to a virtual plane on the back side of the decorative panel that is parallel to the bottom surface of the main unit to which the decorative panel is attached. When a rotating unit that rotates about an orthogonal axis is provided, it is necessary to take measures to prevent looseness during rotation of the rotating unit.

Accordingly, an object of the present invention is to provide a ceiling-mounted air conditioner having a rotating unit that rotates around an axis orthogonal to a virtual plane on the back side of a decorative panel that is parallel to the bottom surface of a main unit to which the decorative panel is attached. In the above, the object is to prevent backlash during rotation of the rotating unit.

In order to solve the above-described problems, the present invention provides a box-shaped main unit that includes an air blower and a heat exchanger and is arranged behind the ceiling of an air-conditioned room, and the main unit along the ceiling surface of the air-conditioned room. A ceiling-embedded air conditioner comprising a decorative panel attached to the bottom surface of the ceiling-embedded air conditioner, wherein the decorative panel is provided with an air intake section and an air outlet section,
The air blowing part has a rotating unit that rotates about an axis orthogonal to a virtual plane on the back side of the decorative panel that is parallel to the bottom surface of the main unit and blows air from the blower in a predetermined direction, A rotating ring driven by a motor is attached to the rotating unit, and a partition plate unit having a circular opening into which the rotating ring is fitted is arranged on the back surface of the decorative panel,
An outer flange is formed on the outer peripheral side of the rotating ring, and an inner flange is formed on the inner peripheral side of the opening, and a thrust bearing is formed by the outer flange and the inner flange. , the inner flange is provided with a plurality of stabilizing seats that are in contact with the outer peripheral edge of the outer flange and suppress radial play of the rotating ring ,
The stabilizing seat has a seat portion on which the outer peripheral edge of the outer flange is placed, a side wall portion rising from one end side of the seat portion, and mounting legs for the inner flange provided at the bottom portion of the seat portion. Further, the side wall portion is characterized in that an arcuate surface is formed along the outer peripheral edge of the outer flange .

Further, in the present invention, the partition plate unit has a duct cover covering the opening including the rotating ring, and the rotating ring is in contact with a predetermined portion of the duct cover so as to move in the axial direction of the rotating ring. Also included is an aspect in which a projecting piece is formed to suppress rattling.

According to the present invention, it is possible to suppress radial play during rotation of the rotating ring. Further, by providing a duct cover covering the opening including the rotating ring, and providing the rotating ring with a projecting piece that abuts on a predetermined portion of the duct cover, it is possible to suppress the rattling of the rotating ring in the axial direction.

FIG. 2 is an explanatory diagram showing an installation state of the ceiling-embedded air conditioner according to the present invention; The perspective view which shows the said ceiling embedded air conditioner. FIG. 2 is an exploded perspective view of the ceiling-embedded air conditioner. 3 is a schematic cross-sectional view taken along line AA of FIG. 2; FIG. 5 is a schematic cross-sectional view taken along line CC of FIG. 4; FIG. 3 is a schematic cross-sectional view taken along line BB of FIG. 2; FIG. 5 is a schematic cross-sectional view taken along line DD of FIG. 4; FIG. FIG. 3 is a perspective cross-sectional view taken along line BB of FIG. 2; FIG. 2 is a bottom side perspective view of a main unit included in the ceiling-embedded air conditioner. (a) A perspective view showing a decorative panel and a frame separated from each other, (b) A perspective view showing a packing state of the decorative panel. The bottom view which looked at the decoration panel at the time of stop of operation from the air conditioning room side. The bottom view which looked at the decoration panel at the time of operation|movement from the air conditioning room side. FIG. 13 is a perspective view of FIG. 12; The perspective view which shows the partition plate unit attached to the back side of a decorative panel. The perspective view which shows the central blowing unit attached to the said partition plate unit. The perspective view which shows the rotation unit attached to the said partition plate unit. (a) An exploded perspective view showing a frame that supports the partition unit, (b) A perspective view showing a state in which the frame is arranged on the back surface of the decorative panel. FIG. 4 is an external perspective view showing a fan unit and a movable blowing part; FIG. 4 is an exploded perspective view showing a partition plate unit including driving means for the rotation unit; The perspective view which shows the rotation unit with which the rotation ring was attached. The top view which shows a rotating ring. FIG. 2 is an exploded perspective view showing a motor unit; FIG. 4 is a plan view showing a portion of the partition unit including openings to which rotating rings are attached; FIG. 4 is a perspective view showing a stabilizer seat for preventing lateral rattle of the rotating ring; Sectional drawing which shows the state to which the stabilizer was attached. FIG. 4 is a perspective view showing a projecting piece for preventing backlash in the vertical direction of the rotating ring; The perspective view which shows the back side of a duct cover. FIG. 5 is a cross-sectional view for explaining the function of lateral rattling of the rotating ring due to the projecting pieces. The bottom view which shows a rotating ring. FIG. 4 is a cross-sectional view showing the outer flange of the rotatable ring with seals installed; FIG. 4 is a perspective view showing an improved fan unit; The top view which shows the said fan unit.

Several modes for carrying out the present invention will be described in detail below as examples based on the accompanying drawings. However, the present invention is not limited to this.

In the air conditioner according to the present invention, an outdoor unit (not shown) installed outdoors and an indoor unit 1 attached to the ceiling T1 of an air conditioning room R are connected by a gas pipe and a liquid pipe (both not shown) to form a refrigerant circuit. to form

Referring to FIGS. 1 to 3, an indoor unit 1 according to this embodiment includes a box-shaped main unit 10 embedded in the ceiling space T2, and a main unit 10 arranged on the air conditioning room R side of the ceiling T1. It is a ceiling-mounted air conditioner having a decorative panel 70 attached to the bottom surface 101 of the ceiling, and is particularly an omnidirectional ceiling-mounted air conditioner that blows conditioned air over a wide range.

Referring to FIG. 3, main unit 10 has a rectangular top plate 111 made of sheet metal, and a box-shaped outer body 11 made up of side plates 112 and 113 extending downward from the four sides of top plate 111 . . A side plate 112 is the side plate on the long side of the top plate 111, and a side plate 113 is the side plate on the short side of the top plate 111. Two mounting brackets 12 are fixed to the two facing side plates 113, respectively.

The main unit 10 is installed in the ceiling space T2 by suspending the mounting bracket 12 from a plurality of suspension bolts (not shown) fixed to the ceiling space T2.

The decorative panel 70 includes a panel portion 71 that forms the main body of the rectangular decorative panel 70 larger than the top plate 111, and a box-shaped outer body 11 that is erected from the rear surface 70R of the panel portion 71 toward the main unit 10 and has an opening. It has a side wall portion 72 attached to the bottom surface (bottom surface 101 of the main unit 10) to match its size.

The panel portion 71 includes an air intake portion 73 having a square opening on one side 70b existing behind the long sides facing the one side 70b, and an air blowing portion on the other side 70a existing in front of the long side facing the one side 70b. It has 74.

In the indoor unit 1 in FIG. 2, the direction of the top plate 111 is the upper side or the upper side, the direction of the air conditioning room R is the bottom side or the lower side, the air blowing portion 74 side is the front side or front side, the air suction portion 73 side is the rear side or rear side, and the left side is the left side. In the following description, the short side 70c side of is referred to as the left side or left side, and the right short side 70d side is referred to as the right side or right side. The same applies to each component.

As shown in FIG. 10A, the side wall portion 72 has an air intake portion 73 and an air blowout portion 73 formed in a square shape along each side (long sides 70a, 70b, short sides 70c, 70d) of the panel portion 71. A frame 721 having a size surrounding the portion 74, and a beam 722 bridged between the short sides of the frame 721 (sides on the short sides 70c and 70d of the panel portion 71). 70) are screwed together.

Both the frame 721 and the beams 722 are made of sheet metal, and the beams 722 are arranged on the partition portion 713 formed between the air intake portion 73 and the air blowout portion 74 of the panel portion 71 .

According to this, as shown in FIG. 10(b), when the decorative panel 70 is packed, by pressing the beam 722 with the projection on the side of the packing material, it is possible to prevent damage due to impact such as dropping. Become. In addition, by providing the beams 722, the structure can withstand the load applied in the direction parallel to the panel surface 70S of the decorative panel 70. FIG.

The beam 722 may be bridged between the long sides 70a and 70b of the frame 721 according to the shape and arrangement of the air suction portion 73, the air blowout portion 74, and the like.

≪Outer body≫
Next, the parts housed in the main unit 10 will be described with reference to FIGS. 3 to 6. FIG. The inner surface of the top plate 111 of the outer body 11 is provided with a heat insulating material 13 formed of thick expanded polystyrene.

The inner surfaces of the side plates 112 and 113 of the outer shell 11 may be provided with a thin heat insulating sheet (not shown) instead of the heat insulating material 13 . The center of the heat insulating material 13 is opened so that a part of the top plate 111 is exposed when viewed from below. The heat exchanger 20 and the fan unit 30 are fixed to this exposed portion of the top plate 111 .

As shown in FIG. 2 , an electrical component box 14 containing electrical components (not shown) for controlling the indoor unit 1 is attached to the outer surface of the right side surface of the outer shell 11 .

≪Heat Exchanger≫
The heat exchanger 20 is a fin tube type formed of a plurality of strip-shaped aluminum fins 23 arranged in parallel and a plurality of heat transfer tubes 22 passing through the aluminum fins 23, and is two heat exchangers separated from each other. As a part, two heat exchange parts are provided: a front heat exchange part (first heat exchange part) 20L on the left side in FIG. 4 and a rear heat exchange part (second heat exchange part) 20R on the right side in FIG. .

The front heat exchange section 20L and the rear heat exchange section 20R are attached to the top plate 111 so as to face each other. The front heat exchange section 20L and the rear heat exchange section 20R may be arranged substantially perpendicular to the top plate 111 and parallel to each other. As shown in FIG. 4, they are combined in an inverted V shape in which the interval (distance) on the upper end side is wider (longer) than the interval (distance) on the lower end side. Instead of the inverted V shape, a V shape in which the interval (distance) on the upper end side is narrower (shorter) than the interval (distance) on the lower end side may be used.

In any case, the left and right ends of the front heat exchange section 20L and the rear heat exchange section 20R are connected by connecting plates 21, 21, respectively. As a result, the space inside the heat exchanger 20 becomes a fan chamber F whose left and right ends are blocked by the connecting plates 21 , 21 . The bottom surface of the heat exchanger 20 (the surface between the lower ends of the front heat exchange section 20L and the rear heat exchange section 20R) is closed by a drain pan 40, which will be described later.

In this way, since the left and right ends of the front heat exchange section 20L and the rear heat exchange section 20R are blocked by the connecting plates 21, 21, all the air sucked from the air suction section 73 is transferred to the front heat exchange section 20L. Since the air passes through the rear heat exchange section 20R, there is no wasteful flow of air, and the heat exchange capacity is further enhanced.

In addition, in the space between the heat exchanger 20 and the outer shell 11, a first air intake chamber S1 is provided between the outer shell 11 and the rear heat exchanging part 20R, and between the outer shell 11 and the front heat exchanging part 20L. A second air suction chamber S2 is provided therebetween. The first air suction chamber S1 is arranged directly above the air suction portion 73, and the second air suction chamber S2 communicates with the air suction portion 73 via an air guide passage L, which will be described later.

≪Blower fan≫
The fan unit 30 is arranged in a fan chamber F provided inside the heat exchanger 20 . The fan unit 30 includes a sirocco fan type blower fan 31 , a fan motor 36 , a fan mount 311 (see FIG. 3 ) for supporting the blower fan 31 and fixing it to the top plate 111 , and fixing the fan motor 36 to the top plate 111 . A motor mounting base 361 (see FIG. 3) is provided.

The blower fan 31 includes a cylindrical impeller (sirocco fan) 32 having a plurality of blades, a spiral fan casing 34 housing the impeller 32, and a rotating shaft 35 connected to the center of the impeller 32. have.

The number of the blower fans 31 is arbitrarily selected according to the required air conditioning capacity, but in this embodiment, four fans are arranged side by side on the same axis. Each blower fan 31 has the same structure.

In the fan unit 30 , the fan motor 36 is fixed to the top plate 111 by the motor mount 361 , and then two blowing fans 31 are connected to each end of the fan motor 36 by the rotary shaft 35 . Both ends of the rotary shaft 35 are fixed to the top plate 111 via bearing plates (not shown) made up of, for example, L-shaped fittings. Further, there is also a fan fixing portion 341 (see FIG. 4) on the upper portion of the fan casing 34, which is fixed to the top plate 111 with screws.

The fan casing 34 has an accommodation portion 342 that accommodates the impeller 32 , and a cylindrical air blowing portion 343 formed continuously from the accommodation portion 342 and extending downward from the lower end of the heat exchanger 20 . A fan suction port 344 for taking air into the impeller 32 is opened in a circular shape on a side surface of the accommodation portion 342 .

The fan casing 34 may be divided vertically on a plane parallel to the axis of the impeller 32 so that the impeller 32 can be accommodated therein, or may be divided horizontally on a plane perpendicular to the axis of the impeller 32 . It may be formed separately. In addition, inside the fan casing 34 , the accommodating portion 342 and the air blowing portion 343 are connected to form the air blowing passage 33 of the blown air H. As shown in FIG.

As described above, in this embodiment, since the fan unit 30 is arranged with the internal space surrounded by the heat exchanger 20 as the blower chamber F, when the impeller 32 of the blower fan 31 rotates, the air blower chamber The pressure inside F becomes negative, and the air from the air suction section 73 passes through the front heat exchange section 20L and the rear heat exchange section 20R, enters the blower chamber F, is sucked into the fan suction port 344, and flows around the impeller 32. The discharged air is blown in one direction along the air passage 33 in the fan casing 34 and is blown out from the air blowing part 74 to the air conditioning room R.

≪Drain pan≫
A drain pan 40 for receiving drain water generated in the heat exchanger 20 is provided at the lower end of the heat exchanger 20 . The drain pan 40 is integrally formed with a heat insulating member 41 made of expanded polystyrene and a resin drain sheet 42 provided on a surface facing the heat exchanger 20 .

The drain pan 40 is formed in a rectangular shape having a size that covers the opening surface on the lower end side of the heat exchanger 20, and also serves as a partition plate that separates the fan chamber F from the air guide path L described later. The drain pan 40 is provided with ventilation holes 43 in which the tubular blowing portions 343 of the fan unit 30 are fitted, corresponding to the number of the blowing fans 31 (four in this embodiment).

As described above, the heat exchanger 20 has the front heat exchange section 20L and the rear heat exchange section 20R arranged in an inverted V shape, and the bottom surface is narrower than the top surface. The area occupied by the drain pan 40 in the main unit 10 is reduced, the ventilation resistance due to the drain pan 40 is reduced, and the ventilation area around the drain pan 40 is expanded to improve the ventilation efficiency.

A gutter portion 45 is provided on the drain sheet 42 side of the drain pan 40 to receive the drain water generated in the heat exchanger 20 . Since the drain pan 40 receives condensed water generated on the outer surface side of the fan casing 34 during cooling operation, it is preferable to perform waterproofing around the ventilation holes 43 .

Although not shown, the drain pan 40 may be provided with a drain pump and a drain hose for draining drain water, and a float switch for turning on/off the drain pump.

≪Decorative panel≫
The configuration of the decorative panel 70 will be described with reference to FIGS. 11 to 13. FIG. The decorative panel 70 has an air blowing portion 74 on one long side 70a and an air suction portion 73 on the other long side 70b. is formed as a protruding portion 740 protruding along the long side 70a toward the air conditioning room R side to have a trapezoidal cross section.

According to this embodiment, the protuberance 740 is an elliptical rounded rectangle consisting of two parallel lines of equal length and two half circles, and has inclined sides (peripheral surfaces). The air blowing portion 74 has a fixed blowing portion 75 at the central portion of the raised portion 740, and has movable blowing portions 77L and 77R on both left and right sides. When it is not necessary to distinguish between the movable blowing portions 77L and 77R, they are collectively referred to as the movable blowing portion 77. As shown in FIG.

Also referring to FIG. 16, the movable blowout portion 77L rotates within a predetermined angular range about an axis orthogonal to a virtual plane on the back surface 70R side of the decorative panel 70 parallel to the bottom surface 101 of the main unit 10. It has a truncated conical rotation unit 78L. Similarly, the movable blowout part 77R is a truncated conical rotating unit 78R that rotates within a predetermined angular range about an axis perpendicular to the imaginary plane on the back surface 70R side of the decorative panel 70 that is parallel to the bottom surface 101 of the main unit 10. have. The virtual plane on the side of the rear surface 70R of the decorative panel 70 is also parallel to the ceiling surface T1 of the air conditioning room R.

Semi-circular portions are formed at both ends of the raised portion 740 by part of the rotating units 78L and 78R. Incidentally, when there is no need to distinguish between the rotating units 78L and 78R, they are collectively referred to as the rotating unit 78.

As can be seen from the perspective view of FIG. 13, the top surface (bottom surface) 751 of the fixed blowing part 75 and the top surface (bottom surface) 781 of the rotating unit 78 are always on the same plane even when the rotating unit 78 is rotated. It is designed to improve designability.

The fixed blow-out portion 75 has a trapezoidal cross-section, and a first air blow-out port 754 is opened toward the long side (specific side) 70 a on the side of the front long side (specific side) 70 a. A horizontal airflow direction plate 752 (see FIG. 15) is provided inside, and a vertical airflow direction plate 753 is provided on the opening surface of the first air outlet 754 .

The movable blowout part 77 has a second air blowout port 783 on a part of the side surface of the rotating unit 78 , and the second air blowout port 783 is provided with a vertical wind direction plate 782 . Since the rotation of the rotating unit 78 changes the direction of the wind in the horizontal direction, the movable blowing part 77 does not need a horizontal wind direction plate. The first air outlet 754 of the fixed outlet 75 and the second air outlet 783 of the movable outlet 77 have the same inclination angle in order to give the air outlets 754 and 783 a sense of design unity. It is open along the side with.

The fixed blowout portion 75 blows air in the direction of the long side 70a, while the movable blowout portion 77 has a second air blowout port 783 at a first position facing the long side 70a and at a second position facing the short sides 70c and 70d. 2 positions, and blows out the conditioned air sent from the blower fan 31 within this rotation range in a predetermined direction.

As shown in FIG. 11, when the movable blowout portion 77 is at the first position, the first air blowout port 754 and the second air blowout port 783 are arranged in a straight line. In this case, it is preferable to provide dummy flaps 791, 791 on both sides of the first air outlet 754 in order to make the appearance that the first air outlet 754 and the second air outlet 783 are continuous. The dummy flap 791 is also arranged on the same inclined surface as the first air outlet 754 and the second air outlet 783 .

12 and 13 show a state in which the left movable blowout portion 77L is at the first position and the right movable blowout portion 77R is at the second position facing the short side 70d. Since the movable blowing part 77 is rotatable, the indoor unit 1 is an omnidirectional (multidirectional) blowing type capable of blowing conditioned air in all directions except for the direction of the rear long side 70b. .

Further, as shown in FIGS. 12 and 13, even if the second air outlet 783 of the movable outlet 77 (77L) is rotated to the second position facing the short side, other than the second air outlet 783 Since the portion has a conical side surface, a sense of continuity with the first air outlet 754 can be obtained in terms of appearance. That is, even if the movable blowout portion 77 is rotated, the basic shape (elliptical raised shape) of the air blowout portion 74 is maintained.

According to this embodiment, the first air outlet 754 of the fixed outlet 75 and the second air outlet 783 of the movable outlet 77 protrude in a trapezoidal cross-sectional shape toward the air conditioning room R at a portion of the panel section 71. As a result, the conditioned air is blown substantially horizontally along the panel surface 70S of the decorative panel 70 from the first air outlet 754 and the second air outlet 783. Therefore, the conditioned air can spread over a longer distance.

Also, the conditioned air is blown out from the first air outlet 754 and the second air outlet 783 at the same time. It is difficult for a boundary to occur with the flow, and the interior of the air-conditioned room R can be evenly harmonized.

Note that, unlike the above embodiment, the first air outlet 754 and the second air outlet 783 may open in a vertical plane perpendicular to the panel surface (or ceiling surface) of the decorative panel 70 .

In addition, in the above-described embodiment, the fixed blow-out portion 75 and the left and right movable blow-out portions 77 are housed in the oval raised portion 740 , but the movable blow-out portion 77 is parallel to the bottom surface 101 of the main unit 10 . As long as it is rotatable about an axis perpendicular to the virtual plane on the back surface 70R side, the movable blowout part 77 may be simply arranged on both sides of the fixed blowout part 75 regardless of the appearance. , such aspects are also included in the present invention.

A partition plate unit 50 shown in FIG. 14 is attached to the rear surface 70R side of the decorative panel 70 . 4 and 9, etc., the partition plate unit 50 has four ventilation holes 43 (43a to 43d; see FIG. 9), and has four ducts 51 (51a to 51d) communicating with the air blowing portion 343 of the fan unit 30. As shown in FIG.

In this embodiment, the ventilation holes 43 (43a to 43d) are square holes, and the ducts 51 (51a to 51d) fitted therein are square tubular (square tubular). ) extends to the rear surface 70R of the decorative panel 70 as a rectangular tube.

Of these, the two inner ducts 51a and 51b are fitted into the corresponding ventilation holes 43a and 43b, respectively, and the two outer ducts 51c and 51d are fitted into the corresponding ventilation holes 43a and 43b, respectively. match.

The ducts 51a and 51b are ducts for the fixed blowout portion 75. As shown in FIG. 15, on the lower surface side of the partition plate unit 50, there is a central chamber 751a allocated across the ducts 51a and 51b. A blowout unit 751 is attached.

A left/right wind direction plate 752 is provided in the chamber 751a. A first air outlet 754 is formed on the front side of the central outlet unit 751, and a vertical wind direction plate 753 is provided therein.

Although not shown, a motor for driving the left/right airflow direction plate 752 is arranged on the rear surface of the chamber 751a, and a motor for driving the up/down direction plate 754 is arranged on the side of the first air outlet 754.

The outer ducts 51c and 51d are ducts for the movable blowout portion 77, and as shown in FIG. 16, a rotation unit 78L provided for the left movable blowout portion 77L is rotatably attached to the lower end of the left duct 51c. A rotation unit 78R included in the right movable blowing part 77R is rotatably attached to the lower end of the right duct 51d.

Both the rotating units 78L and 78R are driven by motors. The motor that drives this rotary unit 78 is located in a motor cover 512 shown beside the outer ducts 51c, 51d in FIG.

In this embodiment, the rotation units 78L and 78R are each rotatable from the first position to a position of 90° or more, for example, 100° as the second position. A short-circuit phenomenon may occur in which the air is sucked into the air suction section 73 instead of going to the air conditioning room R.

In order to prevent this, a wall 711 is provided between the rotating unit 78 and the air suction portion 73, referring to FIGS.

In this embodiment, the wall 711 is configured such that a portion of the panel portion 71 around the rotation unit 78 is directed between the rotation units 78L, 78R and the air suction portion 73 from the short sides 70c, 70d, and the top surface of the rotation unit 78 is formed. It is formed in the shape of a slope that rises up to the height of 781 or the height of the air suction portion 73 . 11 to 13 show that the ridgeline 711a of the wall 711 is sloped.

According to this, the wall 711 prevents the short-circuit phenomenon when the rotation unit 78 is rotated to the vicinity of the maximum rotation position, and the blowing airflow spreads farther along the slope surface 712 of the wall 711. It will be. That is, the wall 711 not only prevents the short-circuit phenomenon, but also functions as an air flow guide surface for spreading the blown air over a longer distance by providing the slope surface 712 .

According to this embodiment, since the air blown out from the first air outlet 754 and the second air outlet 783 flows along the panel surface of the decorative panel 70, the air intake portion 73 of the decorative panel 70 is The remaining panel surface 70S including the slope surface 712 of the wall 711 acts as an airflow guide surface.

As described above, the decorative panel 70 is attached to the main unit 10 by fitting the side wall portion 72 into the bottom opening of the main unit 10 and screwing. In this embodiment, the air suction part 73 is arranged on the side of the first air suction chamber S1, and when assembled, the bottom surface 40R of the drain pan 40 (see FIGS. 3 and 9) and the An air guide path L is formed between the decorative panel 70 and the back surface 70R to guide part of the air sucked from the air suction portion 73 to the second air suction chamber S2.

In this air guide path L, the air heading for the second air suction chamber S2 passes between the ducts 51, 51. In order to secure a larger amount of ventilation, as shown in FIG. The bottom surface 40R of the drain pan 40 corresponding to .

Further, in the indoor unit 1, as shown in FIGS. 4 and 6, the decorative panel 70 is provided with a raised portion 740 including a fixed blowout portion 75 and a movable blowout portion 77, and fixed to the side surface of the raised portion 740. By forming the first air outlet 754 of the outlet 75 and the second air outlet 783 of the movable outlet 77, an air guide passage L with a larger vertical width is secured between the drain pan 40 and the decorative panel 70. be able to.

4 and 6, the air suction portion 73 is arranged above the raised portion 740 and included in the panel surface 70S of the decorative panel 70 as viewed from the inside of the air conditioning room R. As a result, the air suction portion 73 is positioned closer to the air guide path L, and part of the air sucked from the air suction portion 73 is directed through the air guide path L to the second air suction chamber S2 side. easier to get to.

≪Assembly≫
Next, assembly of the indoor unit 1 will be described. For the main unit 10 , first, the top plate 111 side of the outer shell 11 is placed on an assembly table, and the heat insulating material 13 is fitted inside the outer shell 11 . Then, the gas connecting pipe and the liquid connecting pipe (both not shown) of the assembled heat exchanger 20 (the heat exchanger in which the front heat exchange section 20L and the rear heat exchange section 20R are connected by the connection plate 21) are pulled out from the side plate 113. In this state, the heat exchanger 20 is fixed to the top plate 111 via a predetermined fixture (not shown). After that, the assembled fan unit 30 is placed in the fan chamber F in the heat exchanger 20 and fixed to the top plate 111 via the motor mounting base 361 and the fan fixing portion 341 .

Next, the gutter portion 45 of the drain pan 40 on the side of the drain sheet 42 is fitted to the bottom surface of the outer shell 11 so as to match the lower ends of the heat exchange portions 20L and 20R. At this time, the blower portion 343 of the fan casing 34 is fitted into the ventilation hole 43 of the drain pan 40 .

The main unit 10 assembled as described above and the decorative panel 70 are individually packed and transported to the installation site. The main unit 10 is installed in the ceiling space T2 by suspending it with a plurality of hanging bolts embedded in the ceiling space T2.

Then, the decorative panel 70 is attached from the air conditioning room R side. At this time, the duct 51 of the partition plate unit 50 is connected to the blowing section 343 of the fan casing 34 through the ventilation hole 43 of the drain pan 40 . Although not shown, the indoor unit 1 can be operated by connecting the refrigerant pipe, the power line, and the signal line to the outdoor unit.

≪Driving≫
When the indoor unit 1 is stopped, as shown in FIG. The first air outlet 754 and the second air outlet 783 are both closed by up/down wind direction plates 782 and 753 .

Then, the compressor and fan motor (both not shown) of the outdoor unit and the fan motor 36 of the indoor unit 1 start operating according to a command from a remote controller (not shown) by the user or a command from the air conditioning system.

In the indoor unit 1, the blower fan 31 rotates as the fan motor 36 operates. As the blower fan 31 rotates, the air in the blower section 343 of the blower fan 31 is blown out, so that the inside of the blower chamber F becomes negative pressure, and the air suction section 73 provided in the decorative panel 70 causes the inside of the air-conditioned room R to flow. Air K is sucked in.

Referring to FIG. 6, air K sucked from air suction portion 73 flows into first air suction chamber S1, passes through air guide path L, and also flows into second air suction chamber S2. The air in the first air suction chamber S1 enters the blower chamber F after being heat-exchanged with the refrigerant through the rear heat exchange section 20R. Similarly, the air in the second air suction chamber S2 enters the fan chamber F after being heat-exchanged with the refrigerant through the front heat exchange section 20L.

The air conditioned in this manner is sent from the air blowing portion 343 of the fan casing 34 toward the fixed blowing portion 75 and the movable blowing portion 77 of the decorative panel 70 through the duct 51 by the rotation of the blower fan 31 .

The conditioned air sent to the fixed blowout part 75 is blown out from the first air blowout port 754 in the direction guided by the left/right airflow direction plate 752 and the up/down airflow direction plate 753 . Also, the conditioned air delivered to the movable blowing part 77 is blown out in the direction of rotation of the rotating unit 78 and in the direction guided by the vertical airflow direction plate 782 .

Since the rotation of the rotating units 78L and 78R can be individually controlled, the conditioned air can be supplied in multiple directions, excluding the direction of the long side 70b on the rear side where the air suction part 73 is located, according to the user's request. can be done.

≪Support structure of partition unit≫
The indoor unit 1 according to this embodiment includes the partition plate unit 50 shown in FIG. The partition unit 50 is attached to the air blowout portion 74 of the decorative panel 70, but is large and heavy because it is provided with the fixed blowout portion 75, the movable blowout portion 77, and the like.

The frame 721 described with reference to FIG. 10 is provided on the rear surface of the decorative panel 70 for the purpose of preventing damage due to impact such as when dropped, but here, as shown in FIG. A frame 760 for supporting the partition plate unit 50 is provided.

As shown in FIG. 17(a), a frame 760 includes long-side frames 761 and 762 arranged along the long sides 70a and 70b of the decorative panel 70, respectively, and both ends of the long-side frames 761 and 762 as main frames. Short-side frames 763 and 764 are arranged along the short sides 70c and 70d of the decorative panel 70, respectively, between them.

Two beams 765 and 766 span between the short-side frame 763 and the short-side frame 764 . Long side frames 761, 762, short side frames 763, 764 and beams 765, 766 are preferably made of sheet metal.

As shown in FIG. 17(b), the partition plate unit 50 is attached to the decorative panel 70 so that the fixed blow-out portion 75 and the movable blow-out portion 77 protrude toward the air conditioning room R to form an air blow-out portion 74. An opening 74 a is formed along the long side 70 a of the decorative panel 70 .

The beams 765 and 766 are arranged on the long sides of the opening 74a in which the air blowing portion 74 is provided, and the partition unit 50 is supported by the beams 765 and 766 on the rear surface 70R side of the decorative panel 70. As shown in FIG.

The partition plate unit 50 is surrounded by a front long-side frame 761 and left and right short-side frames 763 and 764 at three edges of the front edge 50a, the right edge 50b, and the left edge 50c. It is mounted on the rear surface 70R of the decorative panel 70 in a state of being fitted inside. As a result, the beams 765 and 766 are sandwiched between the partition plate unit 50 and the back surface 70R of the decorative panel 70. As shown in FIG.

According to this, the partition plate unit 50 can be mounted on the rear surface of the decorative panel 70 without deforming or distorting the decorative panel 70 .

≪Composition of the movable outlet≫
As shown in FIG. 18, the fan unit 30 and the rotation unit 78 (78L, 78R) are connected via a partition unit 50 so that air can flow. The unit 50 is provided with driving means 600 for rotating the rotating unit 78 . The driving means 600 is provided in each of the rotating units 78L and 78R, but has the same configuration.

20 and 21, the driving means 600 includes an annular rotating ring 610 integrally connected to the upper portion of the rotating unit 78, and a motor unit 650 for rotating the rotating ring 610. As shown in FIG.

The rotary ring 610 has a cylindrical portion 611, and rack teeth 613 are formed on the outer circumference of the cylindrical portion 611 along the arcuate surface of the outer circumference. The rack teeth 613 may be formed over the entire circumference of the cylindrical portion 611, but may be formed in a range that at least achieves the rotation range of the rotation unit 78 (the range between the first position and the second position described above). .

A flange 614 is concentrically formed radially outward on the outer periphery of the cylindrical portion 611 . Hereinafter, this flange 614 is called an outer flange. Inside the cylindrical portion 611, a vent hole 612 communicating with the duct 51 (51c, 51d) for the movable blowing portion is formed in a square shape.

As shown in FIG. 22, the motor unit 650 has a motor (preferably a stepping motor) 651 capable of forward and reverse rotation, a pinion gear 652 attached to its output shaft 651a, and a mounting mount 653. A pinion gear 652 is attached to a predetermined portion of the duct cover 630 to be described later so as to mesh with the rack teeth 613 of the rotating ring 610 .

19 and 23, on both sides of partition plate unit 50, circular openings 520 into which rotating rings 610 are fitted are formed. A flange 521 is concentrically formed radially inward on the inner periphery of the opening 520 . Hereinafter, this flange 521 is called an inner flange.

When the rotating ring 610 is fitted into the opening 520 , the outer flange 614 is placed on the inner flange 521 , and the outer flange 614 slides on the inner flange 521 as the rotating ring 610 rotates. The outer flange 614 and inner flange 521 function as a kind of thrust bearing that receives the axial load of the rotor.

After the rotating ring 610 is fitted into the opening 520 , a duct cover 630 is put on to hold the rotating ring 610 . The duct cover 630 is screwed to the partition unit 50 .

As described above, the duct cover 630 is formed with the ducts 51 (51c, 51d) connected to the ventilation holes 43 formed in the drain pan 40. As shown in FIG. Further, the duct cover 630 is formed with a base portion 631 for mounting the motor unit 650 thereon.

As shown in FIG. 27, the rear surface 630R of the duct cover 630 is formed with an annular guide groove 635 into which the cylindrical portion 611 of the rotating ring 610 is fitted. Also, the circular portion surrounded by the guide groove 635 on the rear surface 630R of the duct cover 630 has a height slightly lower than the edge 630a of the duct cover 630 in FIG. ) has an inner bottom surface 633 .

The duct 51 (51c, 51d) has a rectangular shape, but its ventilation area (cross-sectional area) gradually expands from the upper surface of the duct cover 630 toward the inner bottom surface 633, and the inner bottom surface 633 has vertices (corners). The rotary ring 610 rotates along the circumscribed circle of the duct 51 on the inner bottom surface 633 side.

In the ventilation passage from the fan unit 30 to the second air outlet 783 of the rotating unit 78, the air pressure changes at the rotating portion of the rotating unit 78. By rotating along the circumscribing circle of 51, the blowing passage is not even partially blocked, so pressure change in the rotating portion of the rotating unit 78 can be reduced. Also, the structure of the connecting portion (connecting portion) between the rotating ring 610 and the duct 51 can be made smaller.

In addition, the rotating ring 610 does not have to be in contact with the four vertices of the duct 51 . It may be rotated without reducing the area (without even partially blocking the duct).

Referring to FIG. 19 again, according to this embodiment, the duct cover 630 is further covered with an exterior cover 640 . This exterior cover 640 is slightly larger than the duct cover 630, but may be omitted in some cases.

When changing the air blowing direction of the rotating unit 78 , the rotating ring 610 is rotated within the opening 520 by the motor 651 . It is necessary to prevent the rotating ring 610 from rattling during this rotation. This backlash includes backlash in the horizontal direction (radial direction) and backlash in the vertical direction (axial direction).

First, in order to prevent rattling in the lateral direction (radial direction), a stabilizer seat 523 shown in FIG. 24 is used. The stabilizing seat 523 has a flat seat portion 524 and a side wall portion 525 that rises substantially vertically from one end of the seat portion 524. The bottom portion of the seat portion 524 is provided with a slit for elastically deformable mounting legs. 526 is provided. The side wall portion 525 is formed with an arcuate surface 525 a along the outer peripheral edge 614 a of the outer flange 614 .

The stabilizing seats 523 are preferably made of low-friction resin such as polyacetal (POM). In this example, as shown in FIG. As another example, they may be provided at three locations at intervals of 120°. Moreover, when the length of the stabilizer seat 523 (the length along the circumferential direction of the inner flange 521) is long, it may be arranged at two locations.

The stabilizer seat 523 is attached to the inner flange 521 along the outer peripheral edge 614a of the outer flange 614 of the rotating ring 610. To attach the stabilizer seat 523, as shown in FIG. 522 is bored, and the mounting leg 526 is pushed into the engaging hole 522 while being elastically deformed.

Thus, by providing a plurality of stable seats 523 in contact with the outer peripheral edge 614a of the outer flange 614 on the inner flange 521 side, it is possible to prevent the rotary ring 610 from rattling in the lateral direction (radial direction).

Next, in order to prevent rattling in the vertical direction (axial direction), as shown in FIG. As described above, since the vent hole 612 formed in the cylindrical portion 611 is square, the cylindrical portion 611 has inner walls 617 forming sides of the square. A projecting piece 616 is erected on this inner wall 617 .

The projecting piece 616 is positioned so as to come into contact with the inner bottom surface 633 on the back surface 630R of the duct cover 630 shown in FIG. In this example, the inner bottom surface 633 is arranged along three sides of the square opening of the duct 51, while the projections 616 are arranged at four locations at 90° intervals as shown in FIG. is provided.

According to this, the three protrusions 616 are always on the inner surface 633 regardless of the rotational position of the rotating ring 610, so that the protrusions 616 do not come off the inner bottom surface 633, but the sliding friction resistance is reduced. In order to reduce the size, it is preferable that the contact area of each projecting piece 616 with respect to the inner bottom surface 633 is as small as possible.

28, the projection height of the projecting piece 616 is such that the tip of the projecting piece 616 comes into contact with the inner bottom surface 633 when the duct cover 630 is put on the rotary ring 610. As shown in FIG.

In this way, by providing the protruding piece 616 inside the cylindrical body 611 of the rotating ring 610 to contact the inner bottom surface 633 on the back surface 630R of the duct cover 630, the vertical (axial) rattling of the rotating ring 610 is prevented. can be prevented.

As described above, the rotating ring 610 is rotated within the opening 520 of the partition plate unit 50 by the motor 651, but air leaks from the gap between the inner flange 521 on the opening 520 side and the outer flange 614 on the rotating ring 610 side. It is necessary to take preventive measures, especially measures to prevent condensation during cooling operation.

Therefore, in this example, as shown in FIGS. 29 and 30, a sealing member 618 is provided on the inner surface of the outer flange 614 (the surface facing the inner flange 521). The sealing material 618 only needs to have appropriate elasticity and heat insulation, but since it rubs against the inner flange 521 as the rotating ring 610 rotates, low-friction fibers such as polyacetal fibers (in many cases, short A tape or sheet obtained by flocking fibers to a tape-like or sheet-like base material is preferably employed.

According to this, the clearance between the inner flange 521 and the outer flange 614 can be substantially set to about 0 to 0.5 mm to prevent wind leakage. In addition, the structure can be such that dew condensation does not occur. Also, the sliding frictional resistance caused by the rotation of the rotating ring 610 can be reduced.

Note that, as shown in FIG. 29, bosses 619 used when connecting the rotating unit 78 are provided at a plurality of locations on the rear surface 610R side of the rotating ring 610 .

<Fan unit configuration>
In the fan unit 30 described above with reference to FIG. is also fixed to the top plate 111 of the outer barrel 11 via the motor mounting base 361 . Therefore, the number of parts used is large, and high accuracy is required for the positioning of the blower fan 31 and the fan motor 36 .

31 and 32 show a fan unit 30A improved in this respect. Also in this embodiment, a sirocco fan is preferably used as the blower fan 31, and the fan motor 36 is also used as it is without any particular modification.

In this fan unit 30A, the fan casing 34 of the blower fan 31 is divided into a casing lower part 371 and a casing upper part 372 both made of synthetic resin material. A base 373 is integrally formed.

The bearing portion for supporting the blower fan 31 in the lower casing portion 371 and the bearing portion for supporting the fan motor 36 in the motor mounting base 373 (both not shown) are preliminarily aligned when the motor mounting base 373 is integrally formed with the lower casing portion 371. being put out. Note that the casing upper portion 372 may be locked to the casing lower portion 371 with a locking member 374 such as a snap lock.

According to this fan unit 30A, the blower fan 31 and the fan motor 36 are connected in advance, the casing upper portion 372 is opened, the blower fan 31 is accommodated in the casing lower portion 371, and the fan motor 36 is set on the motor mounting base 373. Positioning (centering) of the blower fan 31 and the fan motor 36 can be easily performed.

Further, it is not necessary to fix the outer shell 11 to the top plate 111 separately for the blower fan 31 and the fan motor 36, and only the mounting portion (not shown) provided in the casing lower portion 371 is fixed to the top plate 111. Just do it.

Further, since the fan unit 30A is unitized in the minimum unit, the number of units to be used may be selected according to the blowing air volume required for the air conditioner, the size of the air blowing part, etc. There is no need to design a dedicated fan unit (blower) for each different model. According to this fan unit 30A, the air volume can be adjusted individually, so more detailed air conditioning operation is possible.

1: indoor unit 10: main unit 11: outer body 111: top plate 112, 113: side plate 12: mounting bracket 13: heat insulating material 20: heat exchanger 20L: front heat exchange section 20R: rear heat exchange section 21: connecting plate 30: Fan Unit 31: Blower Fan 32: Impeller 33: Blower Path 34: Fan Casing 343: Blower Part 35: Rotating Shaft 36: Fan Motor 371: Lower Casing 372: Upper Casing 373: Motor Mounting Base 40: Drain Pan 43: Ventilation hole 45: gutter 50: partition unit 51 (51a to 51d): duct 520: opening 521: inner flange 523: stable seat 600: driving means 610: rotating ring 611: cylindrical portion 612: ventilation hole 613: rack Teeth 614: Outer flange 616: Protruding piece 618: Seal material 630: Duct cover 633: Inner bottom surface 635: Guide groove 70: Decorative panel 70a, 70b: Long side 70c, 70d: Short side 71: Panel part 71a: Panel body 71b : Side panel 711: Wall 712: Slope surface 72: Side wall part 721, 760: Frame 722, 765, 766: Beam 73: Air suction part 74: Air blowing part 740: Raised part 75: Fixed blowing part 751: Central blowing unit 754: First air outlet 77 (77L, 77R): Movable outlet 78 (78L, 78R): Rotating unit 783: Second air outlet R: Air conditioning room T1: Ceiling T2: Above the ceiling F: Blower room S1, S2: Air suction chamber L: Air guide path

Claims (2)

A box-shaped main unit containing an air blower and a heat exchanger inside and arranged behind the ceiling of the air-conditioned room, and a decorative panel attached to the bottom surface of the main unit along the ceiling surface of the air-conditioned room, In a ceiling-embedded air conditioner in which an air suction part and an air blowing part are provided on a panel,
The air blowing part has a rotating unit that rotates about an axis orthogonal to a virtual plane on the back side of the decorative panel that is parallel to the bottom surface of the main unit and blows air from the blower in a predetermined direction, A rotating ring driven by a motor is attached to the rotating unit, and a partition plate unit having a circular opening into which the rotating ring is fitted is arranged on the back surface of the decorative panel,
An outer flange is formed on the outer peripheral side of the rotating ring, and an inner flange is formed on the inner peripheral side of the opening, and the outer flange and the inner flange form a thrust bearing. , the inner flange is provided with a plurality of stabilizing seats that are in contact with the outer peripheral edge of the outer flange and suppress radial play of the rotating ring ,
The stabilizing seat has a seat portion on which the outer peripheral edge of the outer flange is placed, a side wall portion rising from one end side of the seat portion, and mounting legs for the inner flange provided at the bottom portion of the seat portion. The ceiling-embedded air conditioner , wherein the side wall portion is formed with an arcuate surface along the outer peripheral edge of the outer flange . The partition plate unit has a duct cover that covers the opening including the rotating ring, and the rotating ring has a projecting piece that abuts on a predetermined portion of the duct cover to suppress play in the axial direction of the rotating ring. 2. The ceiling-mounted air conditioner according to claim 1, wherein is formed.

Images