JP7068609B2 - Ceiling embedded air conditioner - Google Patents

Description

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

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

As an example, in the invention described in Patent Document 1, a blower fan formed by a U-shaped heat exchanger in the main body unit, a fan casing in the center of the heat exchanger, and a sirocco fan surrounded by the fan casing. Is provided. The decorative panel has an air outlet in the center and a suction port along the three sides below 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 from the outlet in one direction. By surrounding the blower fan with a heat exchanger, the distance between the blower 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 not biased, making the heat exchanger effective. It can be used to increase the heat exchange capacity.

Japanese Unexamined Patent Publication No. 2000-213767

By the way, as an example for blowing out harmonious air in various directions, the air blowing portion of the decorative panel is orthogonal to the virtual plane on the back surface side of the decorative panel parallel to the bottom surface of the main body unit to which the decorative panel is attached. When a rotating unit that rotates about an axis is provided, a rotating portion is provided in the ventilation path of the harmonized air. In the rotating part, the circular duct on the rotating side is connected to the air duct with a square cross section on the air fan side, but because of the irregular connection, the air duct is partially blocked by the circular duct and the air passage. There is a problem that the ventilation area of the air is reduced.

Therefore, an object of the present invention is in a ceiling-embedded air conditioner having a rotating unit that rotates about an axis orthogonal to a virtual plane on the back surface side of the decorative panel parallel to the bottom surface of the main body unit to which the decorative panel is attached. The purpose is to prevent the ventilation area from shrinking at the rotating part in the ventilation path of the conditioned air.

In order to solve the above-mentioned problems, the present invention includes a box-shaped main body unit including a blower and a heat exchanger inside and arranged behind the ceiling of the air conditioning room, and the main body unit along the ceiling surface of the air conditioning room. In a ceiling-embedded air conditioner equipped with a decorative panel attached to the bottom surface of the above-mentioned decorative panel and provided with an air suction part and an air outlet part.
The air blowing unit has a rotating unit that rotates about an axis orthogonal to the virtual plane on the back surface side of the decorative panel parallel to the bottom surface of the main body unit and blows out harmonized air from the blower in a predetermined direction. A rotating ring driven by a motor is attached to the above rotating unit.
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, and the partition plate unit has a duct cover covering the opening including the rotating ring. The duct cover is provided with a duct having a rectangular cross section that serves as a ventilation path for the harmonized air, and the rotating ring is in contact with at least two adjacent apexes of the duct without reducing the ventilation area of the duct. It is characterized by rotating.

Preferably, the rotating ring rotates along the circumscribed circle of the duct.

Further, in the present invention, as a preferred embodiment, an annular guide groove is formed on the back surface of the duct cover along the circumscribed circle of the duct, and the rotating ring is arranged in the guide groove. Is also included.

According to the present invention, the ventilation area is not reduced at the rotating portion in the ventilation passage of the conditioned air. Further, the connecting portion (connecting portion) between the duct and the rotating ring can be miniaturized.

Explanatory drawing which shows the installation state of the ceiling-embedded type air conditioner by this invention. The perspective view which shows the said ceiling-embedded type air conditioner. An exploded perspective view of the ceiling-embedded air conditioner. FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. FIG. 4 is a schematic cross-sectional view taken along the line CC of FIG. FIG. 2 is a schematic cross-sectional view taken along the line BB of FIG. Schematic cross-sectional view taken along the DD line of FIG. FIG. 2 is a perspective sectional view taken along the line BB of FIG. The bottom side perspective view of the main body unit provided in the said ceiling-embedded air conditioner. (A) A perspective view showing the decorative panel and the frame separately, and (b) a perspective view showing the packing state of the decorative panel. Bottom view of the decorative panel when the operation is stopped as seen from the air conditioning room side. Bottom view of the decorative panel during operation as seen from the air conditioning room side. FIG. 12 is a perspective view. 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 blowout unit attached to the partition plate unit. The perspective view which shows the rotating unit attached to the said partition plate unit. (A) An exploded perspective view showing a frame supporting the partition plate unit, and (b) a perspective view showing a state in which the frame is arranged on the back surface of the decorative panel. External perspective view showing the fan unit and the movable blowout portion. An exploded perspective view showing a partition plate unit including a driving means of the rotating unit. A perspective view showing a rotating unit to which a rotating ring is attached. Top view showing a rotating ring. An exploded perspective view showing a motor unit. Top view showing a part of a divider unit including an opening to which a rotating ring is mounted. The perspective view which shows the stable seat for preventing lateral backlash of a rotating ring. Sectional drawing which shows the state which a stable seat is attached. The perspective view which shows the projecting piece for preventing the vertical rattling of a rotating ring. The perspective view which shows the back side of the duct cover. A cross-sectional view illustrating the function of lateral backlash of a rotating ring due to a protrusion. Bottom view showing a rotating ring. Sectional drawing showing the outer flange of the rotating ring to which the seal was attached. A perspective view showing an improved fan unit. The plan view which shows the said fan unit.

Hereinafter, some embodiments for carrying out the present invention will be described in detail as examples based on the accompanying drawings. The present invention is not limited to this.

In the air conditioner according to the present invention, the outdoor unit installed outdoors (not shown) and the indoor unit 1 attached to the ceiling T1 of the air conditioning chamber R are connected by a gas pipe and a liquid pipe (neither is shown) to form a refrigerant circuit. To form.

With reference to FIGS. 1 to 3, the indoor unit 1 according to this embodiment has a box-shaped main body unit 10 embedded in the ceiling back T2 and the main body unit 10 arranged on the air conditioning chamber R side of the ceiling T1. It is a ceiling-embedded air conditioner having a decorative panel 70 attached to the bottom surface 101 of the above, and in particular, an omnidirectional air-conditioning machine that blows out conditioned air over a wide range.

With reference to FIG. 3, the main body unit 10 has a rectangular top plate 111 formed of sheet metal and a box-shaped outer body 11 formed of side plates 112 and 113 extending downward from the four sides of the top plate 111. .. The side plate on the long side of the top plate 111 is used as the side plate 112, and the side plate on the short side is used as the side plate 113. Two mounting brackets 12 are fixed to the two side plates 113 facing each other.

The main body unit 10 is installed in the attic T2 by suspending the mounting bracket 12 with a plurality of hanging bolts (not shown) fixed to the attic T2.

The decorative panel 70 is erected on the main body unit 10 side from the panel portion 71 forming the main body of the rectangular decorative panel 70 larger than the top plate 111 and the back surface 70R of the panel portion 71, and the box-shaped outer body 11 is opened. It has a side wall portion 72 that is sized and attached to the bottom surface (bottom surface 101 of the main body unit 10).

The panel portion 71 includes an air suction portion 73 having a square opening on the one side 70b side existing at the rear of the long sides facing each other, and an air blowing portion on the other side 70a side existing in front of the long side facing the one side 70b. It is equipped with 74.

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

As shown in FIG. 10A, the side wall portion 72 includes an air suction portion 73 and an air blowout portion formed in a square shape along each side (long sides 70a, 70b, short sides 70c, 70d) of the panel portion 71. It has 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 sides of the panel portion 71), and has a panel portion 71 (decorative panel). It is integrally screwed to the back surface of 70).

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

According to this, as shown in FIG. 10B, it is possible to prevent damage due to an impact such as when the decorative panel 70 is dropped by pressing the beam 722 with a projecting piece on the packing material side when packing the decorative panel 70. Become. Further, by providing the beam 722, the structure can withstand a load applied in a direction parallel to the panel surface 70S of the decorative panel 70.

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

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

A thin heat insulating sheet (not shown) may be provided on the inner surfaces of the side plates 112 and 113 of the outer body 11 without providing the heat insulating material 13. The center of the heat insulating material 13 is opened, and 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 body 11.

≪Heat exchanger≫
The heat exchanger 20 is a fin tube type formed by a plurality of strip-shaped aluminum fins 23 arranged in parallel and a plurality of heat transfer tubes 22 penetrating the aluminum fins 23, and two heat exchanges separated from each other. It is provided with two heat exchange units, a front heat exchange unit (first heat exchange unit) 20L on the left side in FIG. 4 and a rear heat exchange unit (second heat exchange unit) 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 unit 20L and the rear heat exchange unit 20R may be arranged in parallel with each other so as to be substantially perpendicular to the top plate 111, but it is preferable because the height dimension is kept low and the heat exchange area is increased. As shown in FIG. 4, they are combined in an inverted C shape in which the distance (distance) on the upper end side is wider (longer) than the distance (distance) on the lower end side. It should be noted that the spacing (distance) on the upper end side may be narrower (shorter) than the spacing (distance) on the lower end side instead of the inverted C shape.

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 and 21, respectively. As a result, the space inside the heat exchanger 20 becomes a blower chamber F whose left and right ends are closed by connecting plates 21 and 21. The bottom surface of the heat exchanger 20 (the surface between the front end heat exchange portion 20L and the lower end of the rear heat exchange portion 20R) is closed by the drain pan 40 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 closed by the connecting plates 21 and 21, all the air sucked from the air suction section 73 becomes the front heat exchange section 20L. Since it passes through the rear heat exchange section 20R, there is no wasteful air flow and the heat exchange capacity is further enhanced.

Further, at a distance between the heat exchanger 20 and the outer cylinder 11, a first air suction chamber S1 is provided between the outer cylinder 11 and the rear heat exchange portion 20R, and the outer cylinder 11 and the front heat exchange portion 20L are provided. A second air suction chamber S2 is provided between them. 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 the air guide L described later.

≪Blower fan≫
The fan unit 30 is arranged in the blower chamber F provided inside the heat exchanger 20. The fan unit 30 has a sirocco fan type blower fan 31, a fan motor 36, a fan mounting base 311 (see FIG. 3) that supports the blower fan 31 and fixes them to the top plate 111, and a fan motor 36 fixed to the top plate 111. The motor mount 361 (see FIG. 3) is provided.

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

The number of 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. In addition, each blower fan 31 has the same structure.

In the fan unit 30, after the fan motor 36 is fixed to the top plate 111 by the motor mounting base 361, two blower fans 31 are connected to each other by a rotating shaft 35 at both ends of the fan motor 36. Both ends of the rotating shaft 35 are fixed to the top plate 111 via a bearing plate (not shown) made of, for example, an L-shaped metal fitting. 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 accommodating portion 342 that accommodates the impeller 32, and a tubular blower portion 343 that is formed so as to extend downward from the accommodating portion 342 continuously below the lower end of the heat exchanger 20. A fan suction port 344 for taking in air into the impeller 32 is circularly opened on the side surface of the accommodating portion 342.

The fan casing 34 may be formed by being divided into upper and lower parts on a surface parallel to the axis of the impeller 32 so that the impeller 32 can be accommodated therein, or left and right on a surface perpendicular to the axis of the impeller 32. It may be divided and formed. Inside the fan casing 34, the accommodating portion 342 and the blowing portion 343 continuously serve as a blowing passage 33 for the blown air H.

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

≪Drain pan≫
At the lower end of the heat exchanger 20, a drain pan 40 for receiving the drain water generated by the heat exchanger 20 is provided. 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 is also a partition plate that separates the blower chamber F and the air guide path L described later. The drain pan 40 is provided with ventilation holes 43 into which the cylindrical blower portion 343 of the fan unit 30 is fitted (for four blower fans 31 in this embodiment).

As described above, in the heat exchanger 20, the front heat exchange section 20L and the rear heat exchange section 20R are arranged in an inverted C shape, and the bottom surface is narrower than the top surface, so that the drain pan 40 becomes smaller by that amount. The area occupied by the drain pan 40 in the main body unit 10 becomes smaller, the ventilation resistance due to the drain pan 40 also decreases, and the ventilation area around the drain pan 40 expands 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 by the heat exchanger 20. Since the dew condensation water generated on the outer surface side of the fan casing 34 during the cooling operation is received by the drain pan 40, it is preferable to perform waterproof treatment around the ventilation hole 43.

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

≪Cosmetic panel≫
The configuration of the decorative panel 70 will be described with reference to FIGS. 11 to 13. The decorative panel 70 is provided with an air blowing portion 74 on one long side 70a side and an air suction portion 73 on the other long side 70b side, of which the air blowing portion 74 is the panel portion 71. Is formed as a raised portion 740 in which a part of the above is raised in a trapezoidal shape in cross section toward the air conditioning chamber R side along the long side 70a.

According to this embodiment, the raised portion 740 is an oval shape which is a rounded rectangle composed of two parallel lines of equal length and two semicircles, and the side surface (peripheral surface) exhibits an inclined surface. The air blowout portion 74 has a fixed blowout portion 75 in the central portion of the raised portion 740, and has movable blowout portions 77L and 77R on both the left and right sides. When it is not necessary to distinguish between the movable outlets 77L and 77R, the movable outlet 77 is collectively referred to as the movable outlet 77.

With reference to FIG. 16, the movable blowout portion 77L rotates in a predetermined angle range about an axis orthogonal to the virtual plane on the back surface 70R side of the decorative panel 70 parallel to the bottom surface 101 of the main body unit 10. It has a truncated cone-shaped rotating unit 78L. Similarly, the movable blowout portion 77R is also a truncated cone-shaped rotating unit 78R that rotates in a predetermined angle range about an axis orthogonal to the virtual plane on the back surface 70R side of the decorative panel 70 parallel to the bottom surface 101 of the main body unit 10. have. The virtual plane on the back surface 70R side of the decorative panel 70 is also parallel to the ceiling surface T1 of the air conditioning chamber R.

Semicircles are formed at both ends of the raised portion 740 by a part of these rotating units 78L and 78R. When it is not necessary 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 blowout portion 75 and the top surface (bottom surface) 781 of the rotating unit 78 are always present on the same plane even when the rotating unit 78 is rotated. The design has been improved.

The fixed outlet portion 75 has a trapezoidal cross section, and a first air outlet 754 is opened toward the long side 70a on the side surface on the front long side (specific side) 70a, and the first air outlet 754 is opened. The left and right wind direction plates 752 (see FIG. 15) are provided inside, and the upper and lower wind direction plates 753 are provided on the opening surface of the first air outlet 754.

The movable outlet portion 77 has a second air outlet 783 on a part of the side surface of the rotary unit 78, and the second air outlet 783 is provided with a vertical wind direction plate 782. Since the wind direction in the left-right direction can be changed by the rotation of the rotation unit 78, the left-right wind direction plate is not required for the movable blowout portion 77. 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 surface it has.

The air blowing direction of the fixed blowing portion 75 is the long side 70a direction, whereas the movable blowing portion 77 is the first position where the second air outlet 783 faces the long side 70a and the short side 70c, 70d side. It rotates between the two positions and blows out the harmonized air sent from the blower fan 31 in this rotation range in a predetermined direction.

As shown in FIG. 11, when the movable outlet portion 77 is in the first position, the first air outlet 754 and the second air outlet 783 are linearly arranged. In this case, it is preferable to provide dummy flaps 791 and 791 on both sides of the first air outlet 754 in order to give 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.

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

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 is a side surface of a cone, a feeling of continuity with the first air outlet 754 can be obtained from the appearance. That is, even if the movable blowout portion 77 is rotated, the basic shape (oval raised shape) of the air blowout portion 74 is maintained.

According to this embodiment, the first air outlet 754 of the fixed outlet portion 75 and the second air outlet 783 of the movable outlet portion 77 are raised in a trapezoidal shape with a part of the panel portion 71 facing the air conditioning chamber R side. It is formed on the side surface of the raised portion 740, whereby the conditioned air is blown out from the first air outlet 754 and the second air outlet 783 in the substantially horizontal direction along the panel surface 70S of the decorative panel 70. Therefore, the conditioned air can be spread farther.

Further, the conditioned air is simultaneously blown out from the first air outlet 754 and the second air outlet 783, but the air flow blown out from the first air outlet 754 and the air blown out from the second air outlet 783. Boundaries are unlikely to occur between the air and the air, and the inside of the air conditioning chamber R can be evenly harmonized.

Unlike the above embodiment, the first air outlet 754 and the second air outlet 783 may be opened in a vertical surface orthogonal to the panel surface (or ceiling surface) of the decorative panel 70.

Further, in the above embodiment, the fixed blowout portion 75 and the left and right movable blowout portions 77 are housed in the oval raised portion 740, but the movable blowout portion 77 is a decorative panel 70 parallel to the bottom surface 101 of the main body unit 10. As long as it is rotatable about an axis orthogonal to the virtual plane on the back surface 70R side of the above, the movable outlet portion 77 may be simply arranged on both sides of the fixed outlet portion 75 regardless of the appearance. , Such an aspect is also included in the present invention.

The partition plate unit 50 shown in FIG. 14 is attached to the back surface 70R side of the decorative panel 70. With reference to FIGS. 4 and 9 above, the partition plate unit 50 has four ventilation holes 43 (43a to ...) formed in the drain pan 40 on the upper surface side (the surface side facing the drain pan 40). 43d; see FIG. 9), each of which is provided with four ducts 51 (51a to 51d) that are fitted to each other and communicate with the blower portion 343 of the fan unit 30.

In this embodiment, the ventilation holes 43 (43a to 43d) are square holes, and the ducts 51 (51a to 51d) fitted therein are square cylinders (square cylinders), and these ducts 51 (51a to 51d). ) Extends to the back surface 70R of the decorative panel 70 as a square cylinder.

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. It fits.

The ducts 51a and 51b are ducts for the fixed outlet portion 75, and as shown in FIG. 15, the lower surface side of the partition plate unit 50 has a center having one chamber 751a assigned across the ducts 51a and 51b. The blowout unit 751 is attached.

Left and right wind direction plates 752 are provided in the chamber 751a. Further, a first air outlet 754 is formed on the front surface 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 and right wind direction plates 752 is arranged on the back surface of the chamber 751a, and a motor for driving the up and down wind direction plates 754 is arranged beside the first air outlet 754.

The outer ducts 51c and 51d are ducts for the movable outlet portion 77, and as shown in FIG. 16, a rotary unit 78L included in the left movable outlet portion 77L is rotatably attached to the lower end of the left duct 51c. Further, a rotary unit 78R included in the movable blowout portion 77R on the right side is rotatably mounted on the lower end of the duct 51d on the right side.

Both the rotating units 78L and 78R are driven by a motor. The motor that drives the rotary unit 78 is arranged in the motor cover 512 shown beside the ducts 51c and 51d on the outside in FIG.

In this embodiment, the rotating units 78L and 78R can each rotate from the first position to a position of 90 ° or more, for example, 100 ° as the second position, but when rotated to such a position, the blowout unit is blown out. There is a possibility that a short circuit phenomenon may occur in which air is sucked into the air suction unit 73 without going to the air conditioning chamber R.

In order to prevent this, a wall 711 is provided between the rotating unit 78 and the air suction portion 73 with reference to FIGS. 11 to 13.

In this embodiment, the wall 711 has a portion of the panel portion 71 around the rotating unit 78 directed from the short side 70c, 70d side between the rotating units 78L, 78R and the air suction portion 73, and the top surface of the rotating unit 78. It is formed in a slope shape that rises 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 has a slope shape.

According to this, the short circuit phenomenon when the rotating unit 78 is rotated to near the maximum rotation position by the wall 711 is prevented, and the blown air flow reaches 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 airflow guide surface that allows the blown air to reach farther by providing the slope surface 712.

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

As described above, the decorative panel 70 is attached to the main body unit 10 by fitting the side wall portion 72 into the bottom opening of the main body unit 10 and screwing. In this embodiment, the air suction portion 73 is arranged on the first air suction chamber S1 side, and at the time of this assembly, as shown by the arrow in FIG. 6, the bottom surface 40R of the drain pan 40 (see FIGS. 3 and 9). An air guide L is formed between the decorative panel 70 and the back surface 70R to guide a part of the air sucked from the air suction portion 73 to the second air suction chamber S2.

In this air passage L, the air toward the second air suction chamber S2 passes between the ducts 51 and 51, but in order to secure a larger amount of ventilation, as shown in FIG. 9, between the ducts 51 and 51. A recess 46 for expanding the cross-sectional area of the ventilation passage L is formed on the bottom surface 40R of the drain pan 40 corresponding to the above.

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 is fixed to the side surface of the raised portion 740. By forming the first air outlet 754 of the outlet portion 75 and the second air outlet 783 of the movable outlet portion 77, a larger vertical width guide path L is secured between the drain pan 40 and the decorative panel 70. be able to.

Further, with reference to FIGS. 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 when viewed from the inside of the air conditioning chamber R. As a result, the air suction portion 73 is positioned closer to the air guide L, and a part of the air sucked from the air suction unit 73 is moved to the second air suction chamber S2 side through the air passage L. It will be easier to go.

≪Assembly≫
Next, the assembly of the indoor unit 1 will be described. In the main body unit 10, first, the top plate 111 side of the outer body 11 is placed on the assembly table, and the heat insulating material 13 is fitted inside the outer body 11. Then, the gas connecting pipe and the liquid connecting pipe (both not shown) of the assembled heat exchanger 20 (heat exchanger in which the front heat exchange portion 20L and the rear heat exchange portion 20R are connected by the connecting 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 attachment (not shown). After that, the assembled fan unit 30 is arranged in the blower 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 on the drain sheet 42 side of the drain pan 40 is fitted to the bottom surface of the outer body 11 so as to be aligned with 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 body unit 10 and the decorative panel 70 assembled as described above are individually packed and transported to the installation site. The main body unit 10 is installed in the attic T2 by suspending it with a plurality of hanging bolts previously embedded in the attic T2.

Then, the decorative panel 70 is attached from the air conditioning chamber R side. At this time, the duct 51 of the partition plate unit 50 is connected to the ventilation portion 343 of the fan casing 34 via 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 supply line, and the signal line to the outdoor unit.

≪Driving≫
When the indoor unit 1 is stopped, as shown in FIG. 11, the rotary units 78L and 78R of the movable outlets 77L and 77R have their second air outlets 783 as the initial positions of the first air of the fixed outlet 75. It faces the same direction as the outlet 754 (long side 70a side) (first position), and both the first air outlet 754 and the second air outlet 783 are closed by the vertical wind direction plates 782 and 753.

Then, the compressor and fan motor of the outdoor unit (neither of them is shown) and the fan motor 36 of the indoor unit 1 start operation according to the command of the remote controller (not shown) by the user or the command of the air conditioning system.

In the indoor unit 1, the blower fan 31 is rotated by the operation of the fan motor 36. Due to the rotation of the blower fan 31, the air in the blower portion 343 of the blower fan 31 is blown out, so that the inside of the blower chamber F becomes a negative pressure, and the air suction portion 73 provided in the decorative panel 70 into the air conditioning chamber R. Air K is sucked in.

With reference to FIG. 6, the air K sucked from the air suction unit 73 flows into the first air suction chamber S1 and also flows into the second air suction chamber S2 through the air guide L. The air in the first air suction chamber S1 passes through the rear heat exchange unit 20R, exchanges heat with the refrigerant, and enters the blower chamber F. Similarly, the air in the second air suction chamber S2 passes through the front heat exchange unit 20L, is heat exchanged with the refrigerant, and enters the blower chamber F.

The air harmonized in this way is sent out from the blower portion 343 of the fan casing 34 to the fixed blowout portion 75 and the movable blowout portion 77 of the decorative panel 70 via the duct 51 by the rotation of the blower fan 31.

The conditioned air sent out to the fixed outlet portion 75 is blown out from the first air outlet 754 in the direction guided by the left and right wind direction plates 752 and the vertical wind direction plate 753. Further, the conditioned air sent out to the movable blowing portion 77 is blown out in the rotation direction of the rotating unit 78 and in the direction guided by the vertical wind direction plate 782.

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

≪Support structure of partition plate unit≫
As described above, the indoor unit 1 according to this embodiment includes the partition plate unit 50 shown in FIG. 14 on the back surface 70R of the decorative panel 70. The partition plate unit 50 is attached to the air blowing portion 74 of the decorative panel 70, but is large and heavy because the fixed blowing portion 75, the movable blowing portion 77, and the like are provided.

The frame 721 described with reference to FIG. 10 is provided on the back surface of the decorative panel 70 for the purpose of preventing damage due to an impact such as when dropped. Here, as shown in FIG. 17, the back surface 70R side of the decorative panel 70 is provided. A frame 760 that supports the partition plate unit 50 is provided.

As shown in FIG. 17A, the frame 760 has a long side frame 761,762 arranged along the long sides 70a and 70b of the decorative panel 70 as a main frame, and both ends of the long side frame 761,762. The space is provided with short side frames 763 and 764 arranged along the short sides 70c and 70d of the decorative panel 70, respectively.

Two beams 765 and 766 are bridged between the short side frame 763 and the short side frame 764. It is preferable that the long side frame 761,762, the short side frame 763,764 and the beam 765,766 are all made of sheet metal.

As shown in FIG. 17B, a partition plate unit 50 is attached to the decorative panel 70 so that its fixed blowing portion 75 and movable blowing portion 77 project toward the air conditioning chamber R side to form an air blowing portion 74. The opening 74a is formed along the long side 70a of the decorative panel 70.

The beams 765 and 766 are arranged on the long side side of the opening 74a where the air blowing portion 74 is provided, and the partition plate unit 50 is supported by the beams 765 and 766 on the back surface 70R side of the decorative panel 70.

The partition plate unit 50 has a frame 760 so that the leading edge 50a, the right side edge 50b, and the left side edge 50c are surrounded by the front long side frame 761 and the left and right short side frames 763 and 764. It is mounted on the back 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.

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

≪Composition of movable outlet≫
As shown in FIG. 18, the fan unit 30 and the rotating unit 78 (78L, 78R) are connected so that air can flow through the partition plate unit 50, but as shown in the exploded perspective view of FIG. 19, the partition plate is connected. The unit 50 is provided with a driving means 600 for rotating the rotating unit 78. The drive means 600 is provided in each of the rotary units 78L and 78R, but the configuration is the same.

With reference to FIGS. 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.

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

Further, on the outer periphery of the cylindrical portion 611, flanges 614 are formed concentrically toward the outer side in the radial direction. Hereinafter, this flange 614 is referred to as an outer flange. Inside the cylindrical portion 611, a vent hole 612 leading to a duct 51 (51c, 51d) for a movable blowout 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 rotation and reverse rotation, a pinion gear 652 attached to an output shaft 651a thereof, and a mount 653 for attachment. The pinion gear 652 is attached to a predetermined portion of the duct cover 630 described later so as to mesh with the rack teeth 613 of the rotating ring 610.

With reference to FIGS. 19 and 23, circular openings 520 into which rotating rings 610 are fitted are formed on both sides of the partition plate unit 50. Flange 521 is formed concentrically on the inner circumference of the opening 520 toward the inside in the radial direction. Hereinafter, this flange 521 is referred to as an inner flange.

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

After the rotary ring 610 is fitted into the opening 520, a duct cover 630 is covered to hold the rotary ring 610. The duct cover 630 is screwed to the partition plate unit 50.

As described above, the duct cover 630 is formed with ducts 51 (51c, 51d) connected to the ventilation holes 43 formed in the drain pan 40. Further, the duct cover 630 is formed with a pedestal portion 631 to which the motor unit 650 is attached.

As shown in FIG. 27, an annular guide groove 635 into which the cylindrical portion 611 of the rotating ring 610 is fitted is formed on the back surface 630R of the duct cover 630. Further, the circular portion surrounded by the guide groove 635 on the back surface 630R of the duct cover 630 has a height slightly lower than the edge 630a of the duct cover 630 in FIG. 27 (a height slightly higher than the edge 630a in the cross-sectional view of FIG. 28). ) Is the inner bottom surface 633.

The duct 51 (51c, 51d) has a square shape, but its ventilation area (cross-sectional area) is gradually expanded from the upper surface of the duct cover 630 toward the inner bottom surface 633, and the apex (corner portion) is formed on the inner bottom surface 633. It extends to a size in contact with the annular guide groove 635, and the rotating ring 610 rotates along the circumscribed circle of the duct 51 on the inner bottom surface 633 side.

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

The rotating ring 610 does not have to be in contact with the four vertices of the duct 51. For example, the rotating ring 610 is a large circle in contact with two adjacent vertices of the duct 51 on the inner bottom surface 633 side, and the ventilation of the duct 51 is ventilated. It may be rotated without reducing the area (without blocking any part of the duct).

With reference to FIG. 19 again, according to this embodiment, the duct cover 630 is further covered with the exterior cover 640. The exterior cover 640 is one size 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 in the opening 520 by the motor 651. It is necessary to prevent the rotating ring 610 from rattling during this rotation. There are two types of rattling: horizontal (radial) rattling and vertical (axial) rattling.

First, in order to prevent rattling in the lateral direction (radial direction), the stabilizing seat 523 shown in FIG. 24 is used. The stable 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, and an elastically deformable mounting leg having a slit at the bottom of the seat portion 524. 526 is provided. The side wall portion 525 is formed with an arc surface 525a along the outer peripheral edge 614a of the outer flange 614.

The stable seat 523 is preferably formed of a low-friction resin such as polyacetal (POM), and is provided at four locations on the outer peripheral side base of the inner flange 521 at intervals of 90 ° as shown in FIG. 23 in this example. As another example, it may be provided at three locations at 120 ° intervals. Further, when the length of the stabilizing seat 523 (the length along the circumferential direction of the inner flange 521) is long, it may be arranged at two places.

The stabilizing 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 stabilizing seat 523, an engaging hole is formed in the inner flange 521 as shown in FIG. A 522 may be bored and the mounting leg 526 may be elastically deformed and pushed into the engaging hole 522.

As described above, by providing the stabilizing seats 523 in contact with the outer peripheral edge 614a of the outer flange 614 at a plurality of locations on the inner flange 521 side, it is possible to prevent the rotating 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. 26, a projecting piece 616 is provided inside the cylindrical body 611 of the rotating ring 610. As described above, since the ventilation holes 612 formed in the cylindrical portion 611 have a quadrangular shape, there is an inner wall 617 forming each side of the quadrangle in the cylindrical portion 611. The projectile 616 is erected on the inner wall 617.

The position of the projecting piece 616 is a position where it can come into contact with the inner bottom surface 633 on the back surface 630R of the duct cover 630 shown in FIG. 27. In this example, the inner bottom surface 633 is arranged along three sides of the rectangular opening of the duct 51, whereas as shown in FIG. 21, the projecting pieces 616 are arranged at four positions at 90 ° intervals. It is provided.

According to this, regardless of the rotation position of the rotating ring 610, since the three projecting pieces 616 are always on the inner surface 633, the projecting pieces 616 do not come off from the inner bottom surface 633, but the sliding friction resistance is increased. In order to make it smaller, it is preferable that the contact area per projecting piece 616 with respect to the inner bottom surface 633 is as small as possible.

Further, as shown in FIG. 28, the protruding height of the projecting piece 616 is set to the height at which the tip of the projecting piece 616 comes into contact with the inner bottom surface 633 when the rotating ring 610 is covered with the duct cover 630.

In this way, by providing the projecting piece 616 that abuts on the inner bottom surface 633 on the back surface 630R of the duct cover 630 inside the cylindrical body 611 of the rotating ring 610, the rotating ring 610 is loosened in the vertical direction (axial direction). Can be prevented.

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

Therefore, in this example, as shown in FIGS. 29 and 30, a sealing material 618 is provided on the inner surface (the surface side facing the inner flange 521) of the outer flange 614. The sealing material 618 may have appropriate elasticity and heat insulating properties, but since it is rubbed against the inner flange 521 as the rotating ring 610 rotates, as a low friction fiber, for example, a fiber made of polyacetal (often short). A tape or sheet in which hair (fiber) is planted on a tape-shaped or sheet-shaped base material is preferably used.

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 condensation does not occur. In addition, the sliding friction resistance associated with the rotation of the rotating ring 610 can be reduced.

As shown in FIG. 29, bosses 619 used for connecting the rotating unit 78 are provided at a plurality of locations on the back surface 610R side of the rotating ring 610.

≪Fan unit configuration≫
In the fan unit 30 described with reference to FIG. 3, the blower fan 31 is fixed to the top plate 111 of the outer body 11 via the fan mounting base 311 provided on the fan casing 34, and the fan motor 36 is also used. Is also fixed to the top plate 111 of the outer body 11 via the motor mounting base 361. Therefore, a large number of parts are used, and high accuracy is required for positioning the blower fan 31 and the fan motor 36.

31 and 32 are fan units 30A improved in this respect. Also in the present 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 change.

In the fan unit 30A, the fan casing 34 of the blower fan 31 is divided into two parts, a casing lower portion 371 made of a synthetic resin material and a casing upper portion 372. The fan motor 36 is attached to the lower casing 371. The base 373 is integrally formed.

The bearing portion that supports the blower fan 31 of the lower casing 371 and the bearing portion that supports the fan motor 36 of the motor mount 373 (both not shown) are cored in advance when the motor mount 373 is integrally molded with the lower casing 371. It has been put out. The upper casing 372 may be fastened to the lower casing 371 with a locking tool 374 such as a snap lock.

According to the fan unit 30A, the blower fan 31 and the fan motor 36 are connected in advance, the upper part 372 of the casing is opened, the blower fan 31 is housed in the lower part 371 of the casing, and the fan motor 36 is set in the motor mount 373. This is sufficient, and the position (centering) of the blower fan 31 and the fan motor 36 can be easily performed.

Further, the outer body 11 does not need to be fixed 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 lower casing 371 is fixed to the top plate 111. All you have to do is do it.

Further, since the fan unit 30A is unitized in the smallest unit, the number of units to be used may be selected according to the blown air volume required for the air conditioner, the size of the air blown portion, and the like, and the air volume can be increased. There is no need to design a dedicated fan unit (blower) for each different model. According to the fan unit 30A, the air volume can be adjusted individually, so that 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: Insulation material 20: Heat exchanger 20L: Front heat exchange part 20R: Rear heat exchange part 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: Cask lower part 372: Casket upper part 373: Motor mount 40: Drain pan 43: Ventilation hole 45: Gutter 50: Partition plate unit 51 (51a to 51d): Duct 520: Opening 521: Inner flange 523: Stabilizing seat 600: Drive means 610: Rotating ring 611: Cylindrical part 612: Vent hole 613: Rack Tooth 614: Outer flange 616: Projection piece 618: Sealing 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 blowout part 740: Raised part 75; Fixed blowout part 751: Central blowout unit 754: 1st air outlet 77 (77L, 77R): Movable outlet 78 (78L, 78R): Rotating unit 783: 2nd air outlet R: Air conditioning room T1: Ceiling T2: Behind the ceiling F: Blower room S1, S2: Air suction chamber L: Air duct

Claims (3)

It is equipped with a box-shaped main unit that includes a blower and heat exchanger and is placed behind the ceiling of the air-conditioning room, and a decorative panel that is attached to the bottom of the main body unit along the ceiling surface of the air-conditioning room. In a ceiling-embedded air conditioner in which an air suction part and an air blow part are provided on the panel,
The air blowing unit has a rotating unit that rotates about an axis orthogonal to the virtual plane on the back surface side of the decorative panel parallel to the bottom surface of the main body unit and blows out harmonized air from the blower in a predetermined direction. A rotating ring driven by a motor is attached to the above rotating unit.
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, and the partition plate unit has a duct cover that covers the opening including the rotating ring.
The duct cover is provided with a duct having a rectangular cross section that serves as a ventilation path for the conditioned air, and the rotating ring is in contact with at least two adjacent apexes of the duct without reducing the ventilation area of the duct. A ceiling-embedded air conditioner characterized by rotating. The ceiling-embedded air conditioner according to claim 1, wherein the rotating ring rotates along the circumscribed circle of the duct. The ceiling according to claim 2, wherein an annular guide groove is formed on the back surface of the duct cover along the circumscribed circle of the duct, and the rotating ring is arranged in the guide groove. Embedded air conditioner.

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