JP2019211102A - Ceiling embedded air conditioner - Google Patents

Abstract

To provide a blower fan and a fan motor which are easily assembled in a body unit.SOLUTION: In a ceiling embedded air conditioner, a fan casing 34 for a blower fan 31 is formed integrally with a motor fitting base 373 for a fan motor 36 to form a fan unit. The ceiling embedded air conditioner includes multiple fan units in accordance with a blowout air volume and/or a size of an air outlet part.SELECTED DRAWING: Figure 31

Description

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

  In a ceiling-embedded air conditioner, an outdoor unit installed outdoors and an indoor unit installed behind the ceiling of an 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 body unit embedded in the back of the ceiling, and a decorative panel that is disposed on the ceiling air conditioning room side and is attached to the main body unit.

  As an example, in the invention described in Patent Document 1, a U-shaped heat exchanger in the main unit, a fan casing in the center of the heat exchanger, and a blower fan formed by a sirocco fan surrounded by the fan casing Is provided. In the decorative panel, a suction port is formed in the center along three sides below the blower outlet and the heat exchanger.

  And it becomes possible to heat-exchange the air suck | inhaled from the suction inlet with a refrigerant | coolant with a heat exchanger, and to blow off from a blower outlet toward one direction. Surrounding the blower fan with a heat exchanger makes the distance between the blower fan and the surface of the heat exchanger almost constant, and the air speed and volume of air passing through the heat exchanger are less biased and the heat exchanger is effective It can be used to increase the heat exchange capacity.

JP 2000-2137767 A

  By the way, the blower fan (sirocco fan) and the fan motor are coaxially connected and fixed to, for example, the top plate of the main unit. Conventionally, the blower fan has a fan mounting base provided on the fan casing. The fan motor is also fixed to the top plate via the motor mounting base.

  In this way, since the blower fan and the fan motor are fixed to the top plate through separate mounting bases, high accuracy is required for the positioning (centering) of the blower fan and the fan motor. There is a problem.

  Accordingly, an object of the present invention is to provide a blower fan and a fan motor that can be easily incorporated into a main unit in a ceiling-embedded air conditioner.

In order to solve the above-described problems, the present invention includes a box-shaped main body unit that includes a blower and a heat exchanger inside and is disposed behind the ceiling of the air conditioning room, and the main body unit extends along the ceiling surface of the air conditioning room. In the ceiling-embedded air conditioner that includes a decorative panel attached to the bottom surface of the ceiling panel, and the decorative panel is provided with an air suction portion and an air blowing portion.
The blower includes a fan motor, a motor mounting base that supports the fan motor, a sirocco fan driven by the fan motor, and a fan casing in which the sirocco fan is housed, and the motor mounting base and the fan casing. It is characterized by having a plurality of integrally formed fan units.

  Preferably, the fan casing is divided into a casing lower part and a casing upper part, and the motor mount is integrally formed in the casing lower part.

  Moreover, the aspect provided with the mounting base with respect to the said main body unit in any one of the said casing lower part and a casing upper part is also contained in this invention.

  In a mode in which a plurality of air outlets are provided in the air outlet, the fan unit is assigned to each of the air outlets.

  According to the present invention, the fan motor can be positioned (centered) only by setting the fan motor on the motor mounting base, so that it can be easily incorporated into the main unit. Further, the number of fan units to be used may be selected according to the amount of blown air required for the air conditioner, and there is no need to design a dedicated blower for each model having a different amount of blown air.

Explanatory drawing which shows the installation state of the ceiling-embedded air conditioner by this invention. The perspective view which shows the said ceiling embedded type air conditioner. The disassembled perspective view of the said ceiling embedded type air conditioner. FIG. 3 is a schematic sectional view taken along line AA in FIG. 2. FIG. 5 is a schematic cross-sectional view taken along the line CC in FIG. 4. FIG. 3 is a schematic sectional view taken along line BB in FIG. 2. FIG. 5 is a schematic cross-sectional view along the line DD in FIG. 4. FIG. 3 is a perspective sectional view taken along line BB in FIG. 2. The bottom side perspective view of the main-body unit with which the said ceiling-embedded air conditioner is provided. (A) The perspective view which isolate | separates and shows a decorative panel and a flame | frame, (b) The perspective view which shows the packing state of a decorative panel. The bottom view which looked at the decorative panel at the time of a shutdown from the air-conditioning room side. The bottom view which looked at the decorative panel at the time of driving | operation from the air-conditioning room side. The perspective view of FIG. The perspective view which shows the partition plate unit attached to the back surface side of a decorative panel. The perspective view which shows the center 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) The disassembled perspective view which shows the frame which supports a partition plate unit, (b) The perspective view which shows the state which has arrange | positioned the frame on the back surface of the decorative panel. The external appearance perspective view which shows a fan unit and a movable blowing part. The disassembled perspective view which shows the partition plate unit containing the drive means of a rotation unit. The perspective view which shows the rotation unit to which the rotation ring was attached. The top view which shows a rotation ring. The exploded perspective view which shows a motor unit. The top view which shows a part of partition plate unit containing the opening part by which a rotation ring is mounted | worn. The perspective view which shows the stable seat for prevention of the horizontal play of a rotation ring. Sectional drawing which shows the state in which the stable seat was attached. The perspective view which shows the protrusion piece for the vertical backlash of a rotation ring. The perspective view which shows the back surface side of a duct cover. Sectional drawing explaining the function with the horizontal play of the rotation ring by a protrusion. The bottom view which shows a rotation ring. Sectional drawing which shows the outer flange of the rotation ring to which the seal was attached. The perspective view which shows the improved fan unit. The top view which shows the said fan unit.

  Hereinafter, some modes for carrying out the present invention will be described in detail as examples based on the accompanying drawings. Note that 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 the air conditioning room R are connected by a gas pipe and a liquid pipe (both not shown), and a refrigerant circuit. Form.

  With reference to FIG. 1 thru | or FIG. 3, the indoor unit 1 which concerns on this embodiment is arrange | positioned in the air-conditioning room R side of the box-type main body 10 embed | buried under the ceiling back T2, and the main body unit 10 The ceiling-embedded air conditioner having a decorative panel 70 attached to the bottom surface 101, and in particular, is an omnidirectional blowing-type ceiling-embedded air conditioner that blows conditioned air over a wide range.

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

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

  The decorative panel 70 is a panel portion 71 that forms the main body of the rectangular decorative panel 70 that is larger than the top plate 111, and the box-shaped outer cylinder 11 that is erected from the back surface 70 </ b> R of the panel portion 71 toward the main body unit 10. The side wall portion 72 is attached to the bottom surface (the bottom surface 101 of the main body unit 10) in accordance with the size.

  The panel portion 71 includes an air suction portion 73 that is squarely opened on the one side 70b side that exists on the rear side of the long sides facing each other, and an air blowing portion on the other side 70a side that exists on the front side of the long side that faces the one side 70b. 74 is provided.

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

  As shown in FIG. 10 (a), the side wall 72 includes an air suction portion 73 and an air outlet formed in a square shape along each side (long side 70a, 70b, short side 70c, 70d) of the panel portion 71. A frame 721 having a size surrounding the portion 74 and a beam 722 spanned between the short sides of the frame 721 (sides on the short sides 70c and 70d side of the panel portion 71). 70) is integrally screwed to the back surface.

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

  According to this, as shown in FIG. 10 (b), when the decorative panel 70 is packed, the beam 722 is pressed by the projecting piece on the packing material side, so that it is possible to prevent damage due to an impact such as dropping. Become. Further, by providing the beam 722, a structure that can withstand a load applied in a direction parallel to the panel surface 70S of the decorative panel 70 is obtained.

  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 part 73 and the air blowing part 74.

≪Outer trunk≫
Next, components housed in the main unit 10 will be described with reference to FIGS. On the inner surface of the top plate 111 of the outer cylinder 11, a heat insulating material 13 formed of a thick polystyrene foam is provided.

  The inner surface of the side plates 112 and 113 of the outer body 11 may be provided with a thin heat insulating sheet (not shown) 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 that houses electrical components (not shown) that controls 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. 4 includes two heat exchanging units, a left front heat exchanging unit (first heat exchanging unit) 20L in FIG. 4 and a right rear heat exchanging unit (second heat exchanging unit) 20R in FIG. .

  The front heat exchange unit 20L and the rear heat exchange unit 20R are attached to the top plate 111 so as to face each other. The front heat exchanging part 20L and the rear heat exchanging part 20R may be arranged substantially parallel to each other so as to be substantially perpendicular to the top plate 111. However, in order to keep the height dimension low and increase the heat exchange area, it is preferable. As shown in FIG. 4, the distance (distance) on the upper end side is combined in an inverted C shape that is wider (longer) than the distance (distance) on the lower end side. Instead of the inverted C shape, the upper end side interval (distance) may be narrower (shorter) than the lower end side interval (distance).

  In any case, the left and right ends of the front heat exchanging portion 20L and the rear heat exchanging portion 20R are connected by the connecting plates 21 and 21, respectively. Thereby, the space inside the heat exchanger 20 becomes the blower chamber F in which both left and right ends are closed by the connecting plates 21 and 21. The bottom surface of the heat exchanger 20 (the surface between the lower ends of the front heat exchange unit 20L and the rear heat exchange unit 20R) is closed by a drain pan 40 described later.

  Thus, since the left and right ends of the front heat exchange part 20L and the rear heat exchange part 20R are blocked by the connecting plates 21, 21, all the air sucked from the air suction part 73 is exchanged with the front heat exchange part 20L. Since it passes through the rear heat exchanging section 20R, there is no useless air flow and the heat exchanging capacity is further enhanced.

  In addition, a first air suction chamber S1 is provided between the outer cylinder 11 and the rear heat exchange part 20R in the interval between the heat exchanger 20 and the outer cylinder 11, and between the outer cylinder 11 and the front heat exchange part 20L. A second air suction chamber S2 is provided therebetween. The first air suction chamber S1 is disposed immediately above the air suction portion 73, and the second air suction chamber S2 communicates with the air suction portion 73 via an air guide path L described later.

≪Blower fan≫
The fan unit 30 is disposed in a blower 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 mounting base 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 mount 361 (see FIG. 3).

  The blower fan 31 includes a cylindrical impeller (sirocco fan) 32 having a plurality of blades, a spiral fan casing 34 that houses the impeller 32, and a rotating shaft 35 that is 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 capability. In this embodiment, four fans are arranged side by side on the same axis. In addition, each ventilation fan 31 has the same structure.

  In the fan unit 30, the fan motor 36 is fixed to the top plate 111 with the motor mounting base 361, and then two blower fans 31 are connected to each other at both ends of the fan motor 36 by the rotation shaft 35. 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 bracket. Further, a fan fixing portion 341 (see FIG. 4) is also provided on the upper portion of the fan casing 34, and this is fixed to the top plate 111 with screws.

  The fan casing 34 includes a housing portion 342 that houses the impeller 32, and a cylindrical air blowing portion 343 that is continuously extended from the housing portion 342 and extends below 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 the side surface of the housing portion 342.

  The fan casing 34 may be formed by dividing it vertically into a plane parallel to the axis of the impeller 32 so that the impeller 32 can be accommodated therein, or left and right on a plane perpendicular to the axis of the impeller 32. You may divide and form. In addition, in the fan casing 34, the accommodating part 342 and the ventilation part 343 become the ventilation path 33 of the blowing air H continuously.

  As described above, in this embodiment, since the fan unit 30 is disposed 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 blower chamber The inside of F becomes negative pressure, and the air from the air suction part 73 enters the blower chamber F through the front heat exchange part 20L and the rear heat exchange part 20R, and is sucked into the fan suction port 344 and around the impeller 32 The discharged air is blown out in one direction along the air blowing path 33 in the fan casing 34 and blown out from the air blowing portion 74 to the air conditioning room R.

≪Drainpan≫
A drain pan 40 that receives drain water generated in the heat exchanger 20 is provided at the lower end of the heat exchanger 20. The drain pan 40 is formed by integrally molding a heat insulating member 41 made of styrene foam 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 partitions the blower chamber F and the air guide path L described later. The drain pan 40 is provided with ventilation holes 43 for the number of the blower fans 31 (four in this embodiment) into which the blower 343 having the cylindrical shape of the fan unit 30 is fitted.

  As described above, the heat exchanger 20 has the front heat exchanging part 20L and the rear heat exchanging part 20R arranged in an inverted C shape, and the bottom surface is narrower than the upper surface. The area occupied by the drain pan 40 in the main body unit 10 is reduced, the ventilation resistance by the drain pan 40 is reduced, the ventilation area around the drain pan 40 is expanded, and the ventilation efficiency is improved.

  On the drain sheet 42 side of the drain pan 40, a flange 45 is provided for receiving drain water generated by the heat exchanger 20. In addition, 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 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, a float switch for controlling on / off of the drain pump, and the like.

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

  According to this embodiment, the raised portion 740 is an oval that is a rounded rectangle composed of two parallel lines of equal length and two semicircles, and the side surface (circumferential surface) has an inclined surface. The air blowing part 74 has a fixed blowing part 75 at the center of the raised part 740, and has movable blowing parts 77L and 77R on both the left and right sides. When there is no need to distinguish between the movable blowing portions 77L and 77R, the movable blowing portions 77 are collectively referred to as a movable blowing portion 77.

  Referring also to FIG. 16, the movable blowing portion 77 </ b> L rotates within a predetermined angle range about an axis perpendicular to the virtual plane on the back surface 70 </ b> R side of the decorative panel 70 parallel to the bottom surface 101 of the main body unit 10. A frustoconical rotation unit 78L is provided. Similarly, the movable blowout portion 77R is a truncated cone-shaped rotation unit 78R that rotates within a predetermined angle range about an axis that is orthogonal to a virtual 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 back surface 70R side 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 a part of the rotating units 78L and 78R. When there is no need to distinguish between the rotary units 78L and 78R, the rotary units 78L and 78R are collectively referred to as the rotary unit 78.

  As can be seen from the perspective view of FIG. 13, the top surface (bottom surface) 751 of the fixed outlet 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 is improved.

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

  The movable air outlet 77 has a second air outlet 783 in a part of the side surface of the rotary unit 78, and a vertical air direction plate 782 is provided at the second air outlet 783. Since the wind direction in the left-right direction is changed by the rotation of the rotation unit 78, the left and right wind direction plates are not necessary for the movable blowing 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 these air outlets 754 and 783 a sense of design uniformity. It is opened along the side surface.

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

  As shown in FIG. 11, when the movable outlet 77 is in the first position, the first air outlet 754 and the second air outlet 783 are arranged in a straight line. In this case, it is preferable to provide dummy flaps 791 and 791 on both sides of the first air outlet 754 so that the first air outlet 754 and the second air outlet 783 are continuous. The dummy flap 791 is also disposed 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 blowing portion 77L is in the first position and the right movable blowing portion 77R is in the second position facing the short side 70d. As described above, since the movable blowing unit 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. .

  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 continuity with the first air outlet 754 is obtained in appearance. That is, even if the movable blowing part 77 is rotated, the basic shape (oval raised shape) of the air blowing part 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 are raised in a trapezoidal cross section with a part of the panel portion 71 facing the air conditioning room R side. It is formed in the side surface of the raised part 740 made to do, and, thereby, conditioned air is blown off from the 1st air blower outlet 754 and the 2nd air blower 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.

  In addition, conditioned air is blown out simultaneously 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. It is difficult for a boundary to form between the air flow and the air conditioning room R can be harmonized uniformly.

  In addition, unlike the said embodiment, the 1st air blower outlet 754 and the 2nd air blower outlet 783 may be opened in the vertical surface orthogonal to the panel surface (or ceiling surface) of the decorative panel 70. FIG.

  Further, in the above embodiment, the fixed blowing portion 75 and the left and right movable blowing portions 77 are housed in the oval raised portion 740, but the movable blowing portion 77 is parallel to the bottom surface 101 of the main unit 10. As long as it can be rotated around an axis orthogonal to the virtual plane on the back surface 70R side, a mode in which the movable blowing portions 77 are simply arranged on both sides of the fixed blowing portion 75 may be used without being restricted by the appearance. Such an embodiment is also included in the present invention.

  A partition plate unit 50 shown in FIG. 14 is attached to the back surface 70 </ b> R side of the decorative panel 70. Referring to FIGS. 4 and 9 together, the partition plate unit 50 has four ventilation holes 43 (43a to 43a) formed in the drain pan 40 on the upper surface side (the surface side facing the drain pan 40). 43d (see FIG. 9), and four ducts 51 (51a to 51d) that are respectively fitted to the air blowing portion 343 of the fan unit 30 are provided.

  In this embodiment, the ventilation hole 43 (43a-43d) is a square hole, and the duct 51 (51a-51d) fitted to this is a rectangular tube shape (square tube shape), These ducts 51 (51a-51d). ) Extends to the back 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 ducts 51c and 51d arranged on the outer side are fitted into the corresponding ventilation holes 43a and 43b, respectively. Match.

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

  A left and right wind direction plate 752 is provided in the chamber 751a. Moreover, the 1st air blower outlet 754 is formed in the front side of the center blowing unit 751, and the up-down wind direction board 753 is provided in it.

  Although not shown, a motor for driving the left and right airflow direction plates 752 is disposed on the back surface of the chamber 751a, and a motor for driving the vertical airflow direction plates 754 is disposed beside the first air outlet 754.

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

  Both the rotation units 78L and 78R are driven by a motor. The motor for driving the rotating unit 78 is disposed in a motor cover 512 shown beside the outer ducts 51c and 51d in FIG.

  In this embodiment, each of the rotation units 78L and 78R can be rotated from the first position to a position of 90 ° or more, for example, 100 °, for example, as the second position. There is a possibility that a short circuit phenomenon occurs in which the air is sucked into the air suction portion 73 without going to the air conditioning room R.

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

  In this embodiment, the wall 711 is a top surface of the rotation unit 78 with a part around the rotation unit 78 of the panel portion 71 facing the rotation units 78L and 78R and the air suction portion 73 from the short sides 70c and 70d side. It is formed in the shape of a slope that rises to the height of 781 or the height of the air suction portion 73. In FIG. 11 thru | or FIG. 13, it has shown that the ridgeline 711a of the wall 711 is slope shape.

  According to this, the short circuit phenomenon when the rotating unit 78 is rotated to the vicinity of 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 far away by providing the slope surface 712.

  According to this embodiment, 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 remaining panel surface 70S except for the slope surface 712 of the wall 711 acts as an air flow guide surface.

  As described above, the decorative panel 70 is attached to the main unit 10 by fitting the side wall 72 into the bottom opening of the main unit 10 and screwing. In this embodiment, the air suction portion 73 is disposed 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) A wind guide path L is formed between the back surface 70R of the decorative panel 70 and leads a 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 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. A recess 46 is formed on the bottom surface 40R of the drain pan 40 corresponding to the above to enlarge the cross-sectional area of the ventilation path L.

  In this indoor unit 1, as shown in FIGS. 4 and 6, the decorative panel 70 is provided with a raised portion 740 including a fixed blowing portion 75 and a movable blowing portion 77, and is 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, a larger air guide path L is secured between the drain pan 40 and the decorative panel 70. be able to.

  4 and 6, the air suction portion 73 is disposed above the raised portion 740 so as to be included in the panel surface 70S of the decorative panel 70 when 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 a part of the air sucked from the air suction portion 73 is moved to the second air suction chamber S2 side through the air guide path L. It becomes easier to face.

≪Assembly≫
Next, assembly of the indoor unit 1 will be described. In the main unit 10, first, the top plate 111 side of the outer body 11 is placed on an assembly table, and the heat insulating material 13 is fitted inside the outer body 11. Then, a gas connection pipe and a liquid connection pipe (both not shown) of the assembled heat exchanger 20 (a heat exchanger in which the front heat exchange part 20L and the rear heat exchange part 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). Thereafter, 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 flange 45 on the drain sheet 42 side of the drain pan 40 is fitted into 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 air blowing part 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 on the ceiling T2 by being suspended by a plurality of suspension bolts previously embedded in the ceiling T2.

  And 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 blower 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 supply line, and the signal line to the outdoor unit.

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

  Then, the compressor and fan motor (not shown) of the outdoor unit and the fan motor 36 of the indoor unit 1 start operation in response to a user's command from a remote controller (not shown) or an air conditioning system command.

  In the indoor unit 1, the blower fan 31 is rotated by the operation of the fan motor 36. The air in the blower section 343 of the blower fan 31 is blown out by the rotation of the blower fan 31, so that the blower chamber F has a negative pressure, and the air suction section 73 provided in the decorative panel 70 has a negative pressure inside the air conditioning room R. Air K is inhaled.

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

  The air thus harmonized is sent from the blower 343 of the fan casing 34 to the fixed blower 75 and the movable blower 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 outlet 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 upper and lower wind direction plates 753. In addition, the conditioned air sent to the movable blowing part 77 is blown out in the direction of rotation of the rotating unit 78 and the direction guided by the up-and-down air direction plate 782.

  Since the rotation units 78L and 78R can be controlled individually, the conditioned air is supplied in multiple directions excluding the direction of the long side 70b on the rear side where the air suction portion 73 is located, as required by the user. Can do.

≪Partition plate unit support structure≫
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 as described above. 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 and the movable blowing portion 77 are provided.

  The frame 721 described with reference to FIG. 10 is provided on the back surface of the decorative panel 70 with the intention of preventing damage due to an impact such as dropping, but here, as shown in FIG. 17, the back surface 70R side of the decorative panel 70 is provided. A frame 760 for supporting the partition unit 50 is provided.

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

  Two beams 765 and 766 are bridged between the short side frame 763 and the short side frame 764. The long side frames 761 and 762, the short side frames 763 and 764, and the beams 765 and 766 are preferably made of sheet metal.

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

  The beams 765 and 766 are respectively arranged on the long side of the opening 74 a 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 70 </ b> R side of the decorative panel 70.

  The partition unit 50 has a frame 760 such that the front edge 50a, the right edge 50b, and the left edge 50c are surrounded by the front long side frame 761 and the left and right short side frames 763, 764. It is mounted on the back surface 70 </ b> R 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 70 </ b> R 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 giving deformation or distortion to the decorative panel 70.

≪Configuration of movable blowout part≫
As shown in FIG. 18, the fan unit 30 and the rotation unit 78 (78L, 78R) are connected through the partition plate unit 50 so that air can flow. As shown in the exploded perspective view of FIG. 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 rotation units 78L and 78R, but the configuration is the same.

  Referring to FIGS. 20 and 21, the driving means 600 includes an annular rotating ring 610 that is integrally connected to the upper portion of the rotating unit 78, and a motor unit 650 that rotates 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 outer arc surface. The rack teeth 613 may be formed over the entire circumference of the cylindrical portion 611, but may be formed in a range that realizes at least the rotation range of the rotation unit 78 (the range between the first position and the second position described above). .

  Further, a flange 614 is formed concentrically on the outer periphery of the cylindrical portion 611 toward the radially outer side. Hereinafter, this flange 614 is referred to as 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 includes a motor (preferably a stepping motor) 651 capable of normal rotation and reverse rotation, a pinion gear 652 attached to the output shaft 651a, 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.

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

  When the rotating ring 610 is fitted into the opening 520, the outer flange 614 is disposed 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 the inner flange 521 function as a kind of thrust bearing that receives the axial load of the rotating body.

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

  As described above, the duct cover 630 is formed with the duct 51 (51c, 51d) connected to the ventilation hole 43 formed in the drain pan 40. The duct cover 630 is formed with a pedestal 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. In addition, the circular portion surrounded by the guide groove 635 on the back surface 630R of the duct cover 630 has a slightly lower height than the edge 630a of the duct cover 630 in FIG. 27 (a slightly higher height than the edge 630a in the sectional view of FIG. 28). ) Of the inner bottom surface 633.

  Although the duct 51 (51c, 51d) has a quadrangular shape, the ventilation area (area of the cross section) gradually increases from the upper surface of the duct cover 630 toward the inner bottom surface 633. The rotation 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 rotary unit 78, the blowing pressure changes at the rotating portion of the rotary unit 78. As described above, the rotary ring 610 is connected to the duct on the inner bottom surface 633 side. By rotating along the circumscribed 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. Moreover, the structure of the connection part (connection part) of the rotating ring 610 and the duct 51 can be reduced in size.

  The rotating ring 610 may not be in contact with the four vertices of the duct 51. For example, the rotating ring 610 has a large circular shape that is in contact with two adjacent vertices of the duct 51 on the inner bottom surface 633 side. You may make it rotate, without reducing an area (without blocking a part of duct).

  Referring again to FIG. 19, according to this embodiment, the duct cover 630 is further covered with the exterior cover 640. The outer 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 in the opening 520 by the motor 651. It is necessary to prevent the rotation ring 610 from rattling during this rotation. The backlash includes a backlash in the horizontal direction (radial direction) and a backlash in the vertical direction (axial direction).

  First, a stabilizing seat 523 shown in FIG. 24 is used to prevent lateral (radial) backlash. The stable seat 523 has a planar 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 that is slit at the bottom of the seat portion 524. 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 stability seats 523 are preferably formed of a low friction resin such as polyacetal (POM), and in this example, as shown in FIG. 23, they are provided at 90 ° intervals at four bases on the outer peripheral side of the inner flange 521. As another example, it may be provided at three positions at intervals of 120 °. Moreover, when the length of the stable seat 523 (the length along the circumferential direction of the inner flange 521) is long, it may be arranged at two places.

  The stable 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 stable seat 523, as shown in FIG. 522 may be formed, and the mounting leg 526 may be pushed into the engagement hole 522 while being elastically deformed.

  Thus, by providing the 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 rotation ring 610 from rattling in the lateral direction (radial direction).

  Next, in order to prevent backlash 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, the vent hole 612 formed in the cylindrical portion 611 has a quadrangular shape, and therefore the inner wall 617 that forms each side of the quadrangle exists in the cylindrical portion 611. The projecting piece 616 is erected on the inner wall 617.

  The position of the projecting piece 616 is a position where it can abut on 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 disposed along three sides of the rectangular opening of the duct 51, whereas, as shown in FIG. 21, the projecting pieces 616 are provided at four positions at intervals of 90 °. Is provided.

  According to this, since the three projecting pieces 616 are always on the inner surface 633 regardless of the rotation position of the rotating ring 610, the projecting pieces 616 do not come off the inner bottom surface 633, but the sliding friction resistance is reduced. In order to make it small, it is preferable that the contact area per protrusion 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 protruding piece 616 is set to a height at which the tip of the protruding piece 616 contacts the inner bottom surface 633 when the duct cover 630 is put on the rotating ring 610.

  Thus, by providing the projecting piece 616 that contacts 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 vertical direction (axial direction) of the rotating ring 610 is loose. Can be prevented.

  As described above, the rotating ring 610 is rotated in the opening 520 of the partition unit 50 by the motor 651, but wind leakage 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 and in particular to prevent condensation during cooling operation.

  Therefore, in this example, as shown in FIGS. 29 and 30, a sealing material 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 properties. However, since the sealing material 618 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 (in many cases, short Preferably, a tape or sheet in which fibers are planted on a tape-like or sheet-like substrate is employed.

  According to this, it is possible to prevent wind leakage by setting the clearance between the inner flange 521 and the outer flange 614 to substantially 0 to 0.5 mm. Moreover, it can be set as the structure which condensation does not generate | occur | produce. Further, the sliding frictional resistance accompanying the rotation of the rotating ring 610 can be reduced.

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

≪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 in the fan casing 34, and the fan motor 36. Also, the motor is fixed to the top plate 111 of the outer body 11 via the motor mounting base 361. Therefore, the number of parts used is large, and high accuracy is required for positioning the blower fan 31 and the fan motor 36.

  31 and 32 show a fan unit 30A in which this point is improved. 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 change.

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

  The bearing part for supporting the blower fan 31 in the casing lower part 371 and the bearing part for supporting the fan motor 36 in the motor mounting base 373 (both not shown) are pre-centered when the motor mounting base 373 is integrally formed in the casing lower part 371. Has been put out. Note that the casing upper portion 372 may be fixed to the casing lower portion 371 by 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 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 mount 373. What is necessary is just to position (centering) the blower fan 31 and the fan motor 36 easily.

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

  Moreover, since this fan unit 30A is unitized by the minimum unit, what is necessary is just to select the number of units to be used according to the blowing air volume requested | required of an air conditioner, the magnitude | size of an air blowing part, etc. There is no need to design a dedicated fan unit (blower) for each different model. According to the fan unit 30A, since the air volume can be individually adjusted, a finer air conditioning operation can be performed.

1: indoor unit 10: main unit 11: outer trunk 111: top plate 112, 113: side plate 12: mounting bracket 13: heat insulating material 20: heat exchanger 20L: front heat exchange unit 20R: rear heat exchange unit 21: connecting plate 30: Fan unit 31: Blower fan 32: Impeller 33: Air passage 34: Fan casing 343: Blower 35: Rotating shaft 36: Fan motor 371: Lower casing 372: Upper casing 373: Motor mount 40: Drain pan 43: Ventilation hole 45: collar part 50: partition plate unit 51 (51a to 51d): duct 520: opening 521: inner flange 523: stability seat 600: driving means 610: rotating ring 611: cylindrical part 612: vent hole 613: rack Teeth 614: Outer flange 616: Protruding piece 618: Sealing material 630: Duct cover 633: Inner Surface 635: Guide groove 70: Decorative panel 70a, 70b: Long side 70c, 70d: Short side 71: Panel portion 71a: Panel body 71b: Side panel 711: Wall 712: Slope surface 72: Side wall portion 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 blowing outlet 77 (77L, 77R): Movable blowing part 78 (78L) 78R): Rotating unit 783: Second air outlet R: Air conditioning room T1: Ceiling T2: Ceiling back F: Blower room S1, S2: Air suction room L: Air duct

Claims (4)

A box-shaped main body unit that includes a blower and a heat exchanger inside and is disposed behind the ceiling of the air conditioning room; and a decorative panel that is attached to the bottom surface of the main body unit along the ceiling surface of the air conditioning room. In the ceiling-embedded air conditioner in which the panel is provided with an air suction part and an air blowing part,
The blower includes a fan motor, a motor mounting base that supports the fan motor, a sirocco fan driven by the fan motor, and a fan casing in which the sirocco fan is housed, and the motor mounting base and the fan casing. A ceiling-embedded air conditioner comprising a plurality of integrally formed fan units.   2. The ceiling-embedded air conditioner according to claim 1, wherein the fan casing is divided into a casing lower part and a casing upper part, and the motor mount is integrally formed in the casing lower part. .   The ceiling-embedded air conditioner according to claim 2, further comprising a mounting base for the main body unit at one of the casing lower part and the casing upper part.   The ceiling filling according to any one of claims 1 to 4, wherein a plurality of air outlets are provided in the air outlet, and the fan unit is assigned to each of the air outlets. Built-in air conditioner.

Images