JP2016191491A - Ceiling embedded air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling embedded air conditioner capable of efficiently blowing air in all directions with a small number of components and man-hours.SOLUTION: First and second guide vanes 7a, 7b are provided inside an air blowout passage 64 of a drain pan 6 so as to be close to short-side walls 64c, 64d respectively; part of blowout air flow of conditioned air is guided toward the short-side wall (lateral) of an air blowout port 32; and then air flow is fed out from a corner part 36 of a decorative panel 3.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a ceiling-embedded air conditioner embedded between a ceiling slab and a ceiling panel. More specifically, the present invention relates to a ceiling-embedded air having a blowout structure that blows air in all directions from a decorative panel. It relates to a harmony machine.

  In a ceiling-embedded air conditioner, a box-shaped casing body is embedded in a space formed between a ceiling slab and a ceiling panel. A square-shaped decorative panel is attached to the bottom surface (surface facing the room) of the casing body, and usually an air inlet is provided at the center and an air outlet is provided around the air inlet. The casing body includes a turbo fan, a heat exchanger disposed so as to surround the outer periphery of the turbo fan, and a drain pan disposed below the heat exchanger (see, for example, Patent Document 1). ).

  However, in the conventional ceiling-embedded air conditioner, the air outlets are arranged at four locations along the four sides of the decorative panel, and the conditioned air that has passed through the heat exchanger is mainly 4 from each side of the decorative panel. The air is blown out in the direction, and air current does not flow in the four corners (corners), so that temperature unevenness is likely to occur at room temperature.

  Therefore, in the ceiling-embedded air conditioner described in Patent Document 1, an air outlet passage is provided over the entire periphery of the drain pan in the housing, and in addition to the air outlets disposed along the four sides of the decorative panel. By providing auxiliary air outlets connecting the adjacent ends of each air outlet at the corner of the decorative panel, the air outlets are octagonal, and a wind direction plate is disposed on each of them. Air can be blown in the direction.

Japanese Patent No. 4052264

  However, according to the prior art of the above-mentioned Patent Document 1, since the air outlet is made into an octagonal ring and a wind direction plate is arranged in each of them, the structure is inevitably complicated, and the number of parts and assembly man-hours are inevitably increased. Increases, which is not preferable in terms of cost.

  The drain pan is usually made of a foamed polystyrene resin material. However, in the above-described conventional technology, the air blowing passage is formed integrally with the foamed polystyrene resin material over the entire periphery of the drain pan. Is weak.

  Therefore, an object of the present invention is to provide a ceiling-embedded air conditioner that can efficiently blow out in all directions with fewer parts and man-hours.

  In order to solve the above-described problems, the present invention includes a casing body embedded in a ceiling and a decorative panel attached to the lower surface of the casing body. The casing body includes a turbo fan and the turbo A heat exchanger disposed so as to surround the outer periphery of the fan, and a drain pan disposed along a lower side of the heat exchanger, wherein the air intake passage leading to the turbo fan is provided in the central portion of the drain pan. The air blowing passage for conditioned air passing through the heat exchanger is provided at four locations along each side of a virtual quadrangle surrounding the air suction passage, and the decorative panel includes the air In the ceiling-embedded air conditioner provided with an air inlet port that communicates with the suction passage and an air outlet port that communicates with the air outlet passage, each of the air outlet passages includes the virtual air outlet. It is formed in a rectangular parallelepiped shape having a pair of long side walls arranged parallel to each side of the square at a predetermined interval, and a pair of short side walls connecting the ends of the long side walls, Each air outlet passage is provided with an airflow guide vane for directing a part of the airflow of the conditioned air toward the short side of the air outlet.

  As a more preferred aspect, the airflow guide vane includes a first airflow guide vane that directs a part of the airflow of the conditioned air toward one short side of the air outlet, and the other short side of the air outlet. A second airflow guide vane directed to the side is provided in each of the air blowing passages.

  The airflow guide vane includes a base plate disposed along the long side wall, and a plurality of guide fins that are vertically provided from the base plate and are disposed in parallel with each other at a predetermined interval. Each of the guide fins is a flat plate in which the upstream base end along the blown air flow is parallel to the air flow direction, and the downstream tip is inclined in an arc shape in the same direction with a predetermined curvature. It is preferable.

  As a more preferable aspect, the width of the base end portion of each guide fin is equal to the width between the long side walls, and the width gradually decreases toward the tip end portion.

  As a more preferable aspect, the base end portion formed in a flat plate shape parallel to the air flow has a length of 1/3 of the length of the air blowing passage, and is circular with respect to the air flow. The tip portion formed in an arc shape has a length that is 2/3 of the passage length of the air blowing passage.

  As another aspect, a locking piece for attaching the airflow guide vane to the long side wall of the air outlet passage is provided at the upper end of the base plate.

  Further, an air guide passage is formed in the corner portion of the decorative panel between adjacent end portions of the adjacent air outlets, and the harmony from each of the adjacent air outlet passages by the airflow guide vanes. A part of the air flow of the air is blown out toward the air guide passage.

  As a more preferred embodiment, each air outlet is provided with a wind direction plate having inclined portions covering half of the air guide passage at both ends, and on one short side wall side of each air outlet passage. A stepping motor that opens and closes the wind direction plate is provided, and of the first and second airflow guide vanes, the second airflow guide vane is one short of the air blowing passage where the stepping motor is provided. It arrange | positions at the side wall side and the said 1st airflow guide vane is arrange | positioned at the other short side wall side of the said air blowing path.

  More preferably, the inclination direction of the guide fins on the first airflow guide vane side and the inclination direction of the guide fins on the second airflow guide vane side are directions away from each other and the first airflow guide vane side is inclined with respect to the virtual horizontal plane. Θ1 <θ2 where θ1 is the inclination angle of each guide fin on the one airflow guide vane side and θ2 is the inclination angle of each guide fin on the second airflow guide vane side with respect to the virtual horizontal plane.

  According to the present invention, according to the present invention, an airflow guide vane is arranged in an air blowing passage formed in a rectangular parallelepiped shape, and a part of the air flowing through the air blowing passage is made short by the airflow guide vane. By forcibly blowing to the side, it is possible to blow in all directions without using a complicated structure.

1 is an external perspective view of a ceiling-embedded air conditioner according to an embodiment of the present invention. Sectional drawing of the principal part of the said ceiling-embedded air conditioner. The disassembled perspective view of the state seen from the bottom face side of the decorative panel. (A) Front view, (b) Plan view, (c) Bottom view, (d) Left side view, and (e) Center longitudinal sectional view of the wind direction plate. The front view which looked at the ceiling embedded type air conditioner in the state where the wind direction board at the time of operation opened from the bottom side (ceiling panel side). The perspective view which expanded the corner | angular part of FIG. The perspective view of the state which removed the decorative panel and looked at the main body casing from the bottom side. The front view which looked at the casing main body from the bottom face side (ceiling panel side). The enlarged front view which looked at the air blowing passage from the bottom face side (ceiling panel side). FIG. 9 is a cross-sectional view taken along line AA in FIG. 8. The perspective view which expanded the inflow side opening part vicinity of the air blowing channel | path of a drain pan. The 1st airflow guide vane, (a) The perspective view seen from the front side, (b) The perspective view seen from the back side, (c) Front view and (d) Bottom view. The second airflow guide vane is (a) a perspective view seen from the front side, (b) a perspective view seen from the back side, (c) a front view and (d) a bottom view. The (a) perspective view and (b) partial sectional view for demonstrating the attachment method to the air blowing path | route to an airflow guide vane.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

  As shown in FIGS. 1 and 2, the ceiling-embedded air conditioner 1 includes a rectangular parallelepiped casing main body 2 housed in a space formed between a ceiling slab and a ceiling panel T, and a casing main body 2. And a decorative panel 3 attached to the bottom surface B of.

  The casing body 2 has a rectangular top plate 21 and four side plates 22a to 22d extending downward from each side of the top plate 21, and the bottom surface B (the bottom surface in FIG. 1) is opened. It consists of a box-shaped container. A heat insulating material 23 made of, for example, polystyrene foam is provided on the inner peripheral surface of the casing body 2.

  At each corner of the casing body 2, there are a total of four hanging brackets 4, which are embedded in the ceiling by locking the hanging brackets 4 to suspension bolts (not shown) suspended from the ceiling. The mold air conditioner 1 is suspended and fixed to the ceiling.

  As shown in FIG. 2, a turbo fan 24 as a blower is disposed almost at the center of the inside of the casing body 2, and a heat exchanger 25 surrounds the turbo fan 24 on the outer periphery of the turbo fan 24. For example, it is arranged in a square frame shape.

  Referring also to FIG. 8, the casing body 2 has one corner portion (a corner portion where the side plate 22 a and the side plate 22 d abut in this example) among the four corner portions in one step from the outside to the inside. A concave portion is formed so as to be recessed, and a pipe lead-out portion P for drawing out the refrigerant pipes 25a and 25b of the heat exchanger 25 to the outside is provided in the concave portion.

  A drain pan 6 is provided on the lower side of the heat exchanger 25 to receive the dew condensation water generated by the heat exchanger 25 during the cooling operation. In this embodiment, the drain pan 6 is made of styrene foam resin, and an air outlet passage for guiding the conditioned air having passed through the heat exchanger 25 to the air outlet 32 of the decorative panel 3 through the drain pan main body 61 having the dew receiving portion 66. 64. On the heat exchanger 25 side of the drain pan body 61, a resin drain sheet 62 is disposed.

  The drain pan 6 is formed in a square frame shape in plan view, and the inside of the square frame is an air suction passage 63 that communicates with the air suction port 31 of the decorative panel 3. A bell mouth 27 for guiding the air sucked from the air suction port 31 to the suction side of the turbo fan 24 is provided in the air suction passage 63.

  Referring also to FIG. 7, an electrical component box 28 is provided on the air inlet 31 side of the bell mouth 27. In this embodiment, the electrical component box 28 is arranged in an L shape on the corner side close to the pipe lead-out portion P.

  In this embodiment, the air outlet passages 64 are provided at four locations in the casing body 2 corresponding to the air outlets 32 of the decorative panel 3, but the basic configuration is substantially the same. One will be described with reference to FIGS.

  The air blowing passage 64 is a pair of long side walls 64a and 64b, which are parallel to each other along the side plates 22a to 22d of the casing body 2 formed in parallel and opposed to each other at a predetermined interval, and the long side wall 64a. , 64b and a rectangular parallelepiped shape surrounded by a pair of short side walls 64c and 64d formed between the end portions of the casing body 2 and penetrates in the vertical direction of the casing body 2 (perpendicular to the paper surface in FIG. 8). . In this embodiment, the air blowing passage 64 is formed integrally with the drain pan 6.

  An opening 64 </ b> B on the outflow side of the air outlet passage 64 communicates with each air outlet 32 of the decorative panel 3. 1 to 3 again, the decorative panel 3 is a rectangular flat frame body, and is screwed to the bottom surface of the casing body 2.

  The decorative panel 3 has an air inlet 31 that is opened in a square shape at the center, and rectangular air outlets 32 are arranged at four locations along the four sides of the air inlet 31. A suction grill 5 is detachably provided at the air suction port 31.

  The suction grill 5 is made of a synthetic resin molded product having a large number of suction holes 51, and a dust filter 52 is held on the back thereof. In this embodiment, the suction grill 5 is attached to the decorative panel 3 through a suction grill frame 37 to which a heat insulating member 38 made of styrene foam is attached.

  The air outlet 32 provided in the decorative panel 3 penetrates the decorative panel 3 in the vertical direction and is opened in a rectangular shape when viewed from the bottom. The air outlets 32 are arranged at four locations in parallel along each side of the virtual quadrangle Q (two-dot chain line shown in FIG. 5) so as to surround the four sides of the air inlet 31.

  In the corner portion 36 where the ends of the air outlets 32 face each other, there are provided four air guide passages 34 for guiding the air blown from the adjacent air outlet 32 to the corner portion 36 of the decorative panel 3. It has been. The air guide passage 34 is a concave groove that is recessed one step inward from the surface (bottom surface) of the decorative panel 3, and the longitudinal axis of one air outlet 32 and the longitudinal direction of the other air outlet passage 32. Are formed in an L shape perpendicular to each other.

  At each air outlet 32, a wind direction plate 33 is rotatably arranged. As shown in FIGS. 4A to 4E, each wind direction plate 33 is formed integrally with a straight portion 331 formed linearly in accordance with the shape of the air outlet 32 and both ends of the straight portion 331. And inclined portions 332 and 332 that cover the air guide passage 34.

  The straight line portion 331 is a convex curved surface whose surface side (upper surface side in FIG. 4 (e)) is gently curved, and the back surface side (lower surface in FIG. 4 (e)) is a concave curved surface whose surface is gently curved according to the surface. It is formed to become.

  The inclined portion 332 is a curved surface having a convex curved surface on the front surface side and a concave curved surface on the back surface side, like the straight portion 331, and the concave curved surface on the back surface side guides air toward the tip 332 a of the inclined portion 332. It has become.

  A rotating shaft 333 for rotating the wind direction plate 33 is provided on the back surface of the wind direction plate 33. In this embodiment, the rotation shafts 333 are provided at the left and right ends and the center of the straight portion 331, and are provided on the same axis for horizontally rotating the wind direction plate 33.

  Two of the three rotary shafts 333 are locked by bearing portions (not shown) provided on the decorative panel 3. The remaining one rotation shaft 333 (in this example, the rotation shaft 333M) is connected to a rotation drive shaft of a stepping motor 35 described later.

  Each wind guide passage 34 is provided with a stepping motor 35 that rotates each wind direction plate 33. In this embodiment, the stepping motor 35 is provided at one place (a total of four places) corresponding to one wind direction plate 33. In this embodiment, one short side (air) of the air outlet 33 is provided. It is provided adjacent to the short side wall 64c of the outlet passage 64.

  According to this, as shown in FIG. 1, when the operation is stopped, each wind direction plate 33 rotates so as to be horizontal along the air outlet 32 and covers the air outlet 32. At that time, the inclined portions 332 of the adjacent wind direction plates 33 are abutted with each other, so that the air guide passages 34 are also covered together.

  Further, during operation, as shown in FIG. 5, each wind direction plate 33 rotates according to the operation state, and the air outlet 32 appears on the bottom surface of the decorative panel 3. Most of the air blown out from each air outlet 32 is guided along the surface of the straight portion 331 of the wind direction plate 33 and blown out from the four sides toward the room at a predetermined blowing angle.

  Further, as shown in FIG. 6, a part of the air blown out from both sides of the air outlet 32 is guided to the tip end portion 332 a along the inner peripheral surface of the inclined portion 332, and the corner portions at the four corners of the decorative panel 3. It blows out toward the room from 36.

  In this way, as shown in FIG. 5, in addition to the four directions from each side of the decorative panel 3, conditioned air is blown out in all directions (all eight directions) including the four corner portions 36. .

  In the present invention, in order to increase the amount of air flowing toward the inclined portion 332 of the wind direction plate 33 and increase the amount of air blown from each corner portion 36, a part of the air flowing through the air suction passage 64 is forced inside the air blowing passage 64. In particular, an airflow guide vane 7 for blowing out toward the side of the air outlet 62 (on the inclined portion 332 side of the wind direction plate 33) is provided. Each airflow guide vane 7 is made of a synthetic resin, and it is preferable that the surface is subjected to a flocking treatment for preventing condensation.

  In this embodiment, the airflow guide vane 7 is arranged near the first airflow guide vane 7a shown in FIG. 12 arranged near one short side wall 64c of the air outlet 64 and the other short side wall 64d. Two air flow guide vanes 7b shown in FIG. 13 are provided.

  For convenience of explanation, the upstream side (the inflow side of the air outlet passage 64) in FIG. 12C (FIG. 13C) is the base end side, and the lower end in FIG. 12C (FIG. 13C). The side (the outflow side of the air blowing passage 64) will be described as the tip end side, and the left-right direction of FIG. 12C (FIG. 13C) will be described as the width direction. In FIG. 12C, the direction of air flow is from the top to the bottom.

  As shown in FIG. 12, the first airflow guide vane 7a includes a base plate 71a arranged in parallel along the long side wall 64a on the casing body 2 side of the air suction passage 64, and a surface perpendicular to the surface of the base plate 71a. Three guide fins 72a, 73a, and 74a are provided.

  The base plate 71a is a flat plate whose back surface abuts in parallel along the long side wall 64a of the air suction passage 64, and both ends in the width direction match the shapes of the first guide fins 72a and the third guide fins 74a. It is formed in an arc shape with a predetermined curvature.

  The first guide fins 72a are erected vertically from one end in the width direction of the base plate 71a (the left end in FIG. 12C), and the second guide fins 73a are perpendicular to the center in the width direction of the base plate 71a. The third guide fins 74a are erected vertically from the other end in the width direction of the base plate 71a (the right end in FIG. 12C), and are arranged in parallel with each other at a predetermined interval.

  At the upper end of the base plate 71a, a locking piece 75a for fixing the first airflow guide vane 7a to the screwing portion 66 of the air blowing passage 64 is provided. The locking piece 75a is erected at right angles to the base plate 71a from the upper end of the back surface of the base plate 71a (upper end on the front side in FIG. 12B) and extends to both ends of the base plate 71a in the width direction. It is an equal width tongue.

  A concave portion 751 formed one step lower in the thickness direction is provided in the central portion of the locking piece 75a, and a screwing hole 752 for screwing is formed in the concave portion 751. Locking claws 753 and 753 that are engaged with locking recesses 662 (see FIG. 14A) of the screwing portion 66 are provided on both sides of the locking piece 75a.

  Next, the first to third guide fins 72a, 73a, and 74a are formed as base end portions 721a, 731a, and 741a formed in a flat plate shape parallel to the airflow direction, and the base end portions 721a, 731a, and 741a, respectively. Tip portions 722a, 732a, and 742a that are inclined in an arc shape in the same direction with a predetermined curvature from the lower end toward the downstream side are provided. In this embodiment, the tip portions 722a, 732a, and 742a of the first to third guide fins 72a, 73a, and 74a extend in an air flow direction that extends obliquely to the left with an inclination angle θ1 with respect to the virtual horizontal plane H of 60 °. The arc surface has a shallow inclination angle. In this embodiment, the virtual horizontal plane H is a plane orthogonal to the air flow direction of the air outlet passage 64.

  The first to third guide fins 72a, 73a, 74a are arranged at equal intervals, respectively, between the first guide fin 72a and the second guide fin 73a, and between the second guide fin 73a and the third guide fin 74a. In between, the air guide path V1 is formed, respectively.

  Each base end portion 721a, 731a, 741a is formed from the upper end of the base plate 71a to a length L1a (vertical direction in FIG. 12D), and the width W1a therebetween is the passage width W of the air outlet 64. (See FIG. 9). The distal end portions 722a, 732a, and 742a have a length L2a from the lower end to the distal end of the base end portions 721a, 731a, and 741a, and a width W2a therebetween is formed so that the width gradually decreases toward the distal end. In this embodiment, the length L1a of the base end portions 721a, 731a, and 741a corresponds to 1/3 of the passage length L from the inflow side opening surface F1 to the outflow side opening surface F2 of the air blowing passage 64.

  According to this, the first to third guide fins 72a, 73a, 74a have gaps between the long side wall 64b and the long side wall 64b facing the long side wall 64a at the base end portions 721a, 731a, 741a of the length L1a. There is almost no gap between the lengths L2a of the tip portions 722a, 732a, and 742a. Accordingly, the air guided to the air guide path V1 is first forcibly guided along the lower left direction along the side surfaces of the first to third guide fins 72a, 73a, and 74a, and then toward the outflow side. As the gap becomes larger, the surrounding air is brought together into one on the outflow side and blown off obliquely.

  Next, as shown in FIGS. 13A to 13D, the second airflow guide vane 7b has substantially the same form as the first airflow guide vane 7a described above, and is on the casing main body 21 side of the air suction passage 64. The base plate 71b is arranged in parallel along the long side wall 64a, and three guide fins 72b, 73b, and 74b are erected vertically from the surface of the base plate 71b.

  The base plate 71b is a flat plate whose back surface abuts in parallel along the long side wall 64a of the air suction passage 64, and both ends in the width direction match the shapes of the first guide fin 72b and the third guide fin 74b. It is formed in an arc shape with a predetermined curvature.

  The first guide fins 72b are erected vertically from one end in the width direction of the base plate 71b (the right end in FIG. 13C), and the second guide fins 73b are perpendicular to the center in the width direction of the base plate 71b. The third guide fins 74b are erected vertically from the other end in the width direction of the base plate 71b (the left end in FIG. 13C), and are arranged in parallel with each other at a predetermined interval.

  At the upper end of the base plate 71b, a locking piece 75b for fixing the second airflow guide vane 7b to the screwing portion 66 of the air blowing passage 64 is provided. The locking piece 75b is erected at a right angle to the base plate 71b from the upper end of the back surface of the base plate 71b (the upper end on the front side in FIG. 13B) and extends to both ends in the width direction of the base plate 71b. It is an equal width tongue.

  A concave portion 751 formed one step lower in the thickness direction is provided in the central portion of the locking piece 75b, and a screwing hole 752 for screwing is formed in the concave portion 751. Locking claws 753 and 753 that are engaged with locking recesses 662 (see FIG. 14A) of the screwing portion 66 are provided on both sides of the locking piece 75b.

  Next, referring also to FIG. 13C, the first to third guide fins 72b, 73b, and 74b are base end portions 721b, 731b, and 741b formed in a flat plate shape parallel to the airflow direction. And tip portions 722b, 732b, and 742b that are inclined in an arc shape in the same direction with a predetermined curvature from the lower ends of the base end portions 721b, 731b, and 741b toward the downstream side. In this embodiment, the tip portions 722b, 732b, and 742b of the first to third guide fins 72b, 73b, and 74b extend in an air flow direction that extends obliquely downward to the right with an inclination angle θ2 with respect to the virtual horizontal plane H of 30 °. The arc surface has a deep inclination angle.

  The first to third guide fins 72b, 73b, 74b are arranged at equal intervals, and are between the first guide fin 72b and the second guide fin 73b, and between the second guide fin 73b and the third guide fin 74b. In addition, air guide paths V2 are respectively formed.

  Each base end portion 721b, 731b, 741b is formed from the upper end of the base plate 71b to a length L1b (vertical direction in FIG. 13D), and the width W1b therebetween is the passage width W of the air outlet 64. (See FIG. 9). The distal end portions 722b, 732b, and 742b have a length L2b from the lower end of the proximal end portions 721b, 731b, and 741b to the distal end, and a width W2b therebetween is formed so that the width gradually decreases toward the distal end. In this embodiment, the length L1b of the base end portions 721b, 731b, and 741b corresponds to 1/3 of the passage length L from the inflow side opening surface F1 to the outflow side opening surface F2 of the air blowing passage 64.

  According to this, the first to third guide fins 72b, 73b, 74b have gaps between the long side wall 64a and the long side wall 64b facing the long side wall 64a at the base end portions 721b, 731b, 741b having the length L1b. There is almost no gap between the lengths L2b of the tip portions 722b, 732b, and 742b. Accordingly, the air guided to the air guide path V2 is first forcibly guided along the lower right direction along the side surfaces of the first to third guide fins 72b, 73b, and 74b, and then toward the outflow side. As the gap becomes larger, the surrounding air is brought together into one on the outflow side and blown off obliquely.

  In this embodiment, each airflow guide vane 7 (7a, 7b) is provided with three guide fins 72a, 73a, 74a (72b, 73b, 74b), but at least three, more preferably Three or four sheets are preferred. That is, if the number of guide fins is two, it is difficult to obtain the effect of bending the air flow.

  Referring to FIG. 10, each airflow guide vane 7 (7 a, 7 b) has a tip 722 a, 732 a, 742 a (722 b, 732 b, 742 b) of each guide fin 72 a, 73 a, 74 a (72 b, 73 b, 74 b). The front end (lower end in FIG. 10) is provided so as to be located on the inner side of the opening surface F2 of the outflow side opening 64B of the air blowing passage 64. According to this, by arranging the lower ends of the guide fins 72a, 73a, 74a (72b, 73b, 74b) inside the opening surface F2 of the air blowing passage 64, the aesthetic appearance is not impaired, and the guide fins Since it does not pop out from the opening 64B on the outflow side on the bottom surface B side, packing is easy.

  As shown in FIGS. 8 and 9, the first airflow guide vane 7a among the two types of airflow guide vanes 7a and 7b having different inclination angles is disposed at a predetermined interval from one short side wall 64c. An air guide path V3 is formed between the short side wall 64a and the first guide fin 72a.

  The other second airflow guide vane 7b is disposed at a predetermined interval from the other short side wall 64d, and an air guide path V4 is formed between the short side wall 64d and the first guide fin 72b. Yes. Further, a central air guide passage V5 that blows air to the air outlet 32 is formed between the first airflow guide vane 7a and the second airflow guide vane 7b.

  According to this, as shown in FIG. 10, the air guided to the first airflow guide vane 7a is forcibly bent to the left side through the air guide path V1 and blown out obliquely to the left. At that time, the air flow descending through the air passage V3 located on the left side is entrained together to blow out air from the air outlet 32 toward the air guide passage 34 on the left side.

  On the left side (short side wall 64 c side) of the air outlet 32 of the decorative panel 3, the above-described stepping motor 35 is disposed so as to substantially block the air guide passage 34. Therefore, the first airflow guide vane 7a uses guide fins 72a to 74a having a shallow angle to blow out a wind having a high flow velocity while avoiding the stepping motor 35, and the wind having a high flow velocity is directed toward the wind direction plate 33. By blowing, air is sent into a narrow space formed between the wind direction plate 33 and the stepping motor 35, and air is sent to the corner portion 36. Further, since air is blown out to the side on the short side wall 64c side so as to avoid the stepping motor 35, it is possible to simultaneously prevent condensation from occurring due to cold air hitting the stepping motor 35 during the cooling operation. .

  On the other hand, the air guided to the second airflow guide vane 7b is forcibly bent to the right side through the air guide path V2, and blown out obliquely downward to the right. At that time, air is blown out from the air outlet 32 toward the right side by entraining the air flow descending through the air passage V4 located on the right side.

  According to this, although the flow velocity of the airflow is slightly reduced by passing the air through the guide fins 72b to 74b having a deep angle of the second airflow guide vane 7b, the amount of air flowing toward the air guide passage 34 is surely ensured. Can be ensured, and stable blowing from the corner portion 36 can be performed.

  That is, as shown in FIG. 5, in the corner portion 36 where the ends of the four air blowing passages 64 arranged so as to surround the four sides of the virtual quadrangle Q face each other, one of the adjacent air blowing passages 64 is provided. The shallow air flow from the first airflow guide vane 7a and the deep airflow from the second airflow guide vane 7b of the other adjacent air blowing passage 64 merge to be directed from the corner portion 36 to the room. And blown out.

Further, as a more preferable aspect of the arrangement of the airflow guide vanes 7a and 7b, the distance from one short side wall 64c to the outermost guide fin (the third guide fin 74a) of the first airflow guide vane 7a is A, the other When the distance from the short side wall 64d to the outermost guide fin (the third guide fin 74b) of the second airflow guide vane 7b is B, and the length of the long side wall 64a of the air blowing passage 64 is C,
The first airflow guide vane 7a and the second airflow guide vane 7b are
(A + B) / C <0.5
It is provided at a position that satisfies

  That is, when (A + B) /C≧0.5, the central air guide passage formed between the first airflow guide vane 7a and the second airflow guide vane 7b with respect to the opening length C of the air blowing passage 64. The length of V5 becomes 1/2 or less, the wind speed of the air flowing through the central air guide passage V5 falls, and efficient blowing in all directions is impossible.

  As shown in FIG. 11, each airflow guide vane 7 a, 7 b is screwed to the edge of the opening 64 </ b> A on the inflow side of the air blowing passage 64 and the opening on the inflow side of the air blowing passage 64. A screwing portion 66 for screwing each airflow guide vane 7 is provided on 64A (the upper surface side in FIG. 6).

  As shown in FIG. 14A, the screwing portion 66 is a recess formed by using a drain sheet material of the drain sheet 62 and being recessed one step lower in the thickness direction, and is the length of the air blowing passage 64. The inflow side opening 64A on the side wall 64a side is provided at two locations with a predetermined interval.

  Each screwing portion 66 is a concave portion having the same shape, and a screwing hole 661 is formed at the center thereof. Locking recesses 662 and 662 for locking the locking claws 753 and 753 provided on the airflow guide vane 7 are provided at corners of the bottom wall and both side walls of the screwing portion 66.

  In this embodiment, the screwing portion 66 is formed on a part of the resin drain sheet 62 in order to obtain sufficient mechanical strength even when the airflow guide vanes 7a and 7b are attached. The periphery of 661 is formed to protrude in a columnar shape toward the drain pan main body 61 side.

  Next, an example of a method for attaching the airflow guide vane 7 to the air outlet passage 64 will be described with reference to FIG. 14B. However, since the attachment method of the airflow guide vane 7 (7a, 7b) is common, Only the first airflow guide vane 7a is illustrated.

  First, in a state where one locking claw 753 of the locking piece 75 a is locked to one locking recess 662, the other locking claw 753 is pushed into the locking recess 662, thereby entering the locking recess 662. The locking piece 75a is temporarily fixed.

  Next, the screw S is inserted into the screwing hole 752 of the locking piece 75a of the first airflow guide vane 7a and screwed together with the screwing hole 661 of the screwing part 66. Thereby, the upper end surface of the 1st airflow guide vane 7a and the upper end surface of the drain pan 6 become the same plane, and the airflow guide vane 7a is integrated with the air blowing path 64 by bonding the sealing material 67 on the surface. . According to this, since the upper end surface of the 1st airflow guide vane 7a and the upper end surface of the drain pan 6 are the same plane, it is easy to stick the sealing material 67 on the surface, and the adhesiveness of the sealing material 7 also increases.

  Further, in this embodiment, in order to prevent a decrease in the amount of air flowing into the air blowing passage 64, as shown in FIG. 11, the opening 64A on the inflow side of the air blowing passage 64 (the upper surface side in FIG. 11). Is provided with a support 65 for supplementing the mechanical strength of the air outlet passage 64.

  The strut 65 is stretched between substantially the center portions of the long side walls 64a and 64b facing each other so that at least a part of the strut 65 protrudes upward from the opening surface F1 on the inflow side of the air blowing passage 64. In this way, not only the mechanical strength of the air blowing passage 64 is supplemented but also the air flowing through the air blowing passage 64 is not hindered, so that a reduction in the amount of air blown from the air blowing port 32 can be suppressed.

  In this embodiment, the airflow guide vane 7 has a first airflow guide vane 7a disposed on one short side wall 64c side and a second airflow guide vane 7b disposed on the other short side wall 64d side. The air flow is collected from two directions at the corner portion 36 where the ends of the outlet 32 are adjacent to each other, but at least one of the air flow guide vanes 7, more preferably, only the second air flow guide vane 7 b may be provided. According to this, it is possible to obtain a necessary and sufficient amount of blowing even if only the second airflow guide vane 7b capable of directly sending air toward the air guide passage 34 is sent to the corner portion 36.

  As described above, according to the present invention, the airflow guide vanes are arranged in the air blowing passage formed in a rectangular parallelepiped shape, and a part of the air flowing through the air blowing passage is made short by the airflow guide vane. By forcibly blowing to the side, it is possible to blow in all directions without using a complicated structure.

DESCRIPTION OF SYMBOLS 1 Ceiling embedded type air conditioner 2 Casing main body 21 Top plate 22a-22d Side plate 23 Heat insulating material 24 Turbo fan 25 Heat exchanger 25a, 25b Refrigerant piping 27 Bellmouth 28 Electrical component box 3 Cosmetic panel 31 Air inlet 32 Air blowing Outlet 33 Wind direction plate 34 Air guide passage 35 Stepping motor 4 Suspension fitting 5 Suction grill 51 Suction hole 52 Dust removal filter 6 Drain pan 61 Drain pan body 62 Drain sheet 63 Air suction passage 64 Air outlet passages 64a, 64b Long side walls 64c, 64d Short Side wall 64A Inflow side opening 64B Outflow side opening 65 Post 66 Screw fixing portion 7 Airflow guide vane 7a First airflow guide vane 71a Base plate 72a First guide fin 73a Second guide fin 74a Third guide fin 75a Stop piece 7b Second airflow guide Over emissions 71b base plate 72b first guide fin 73b second guide fin 74b third guide fin 75b engaging piece V1~V5 air guide path C corner P piping leading portion Q virtual rectangle

Claims (9)

A casing body embedded in the ceiling, and a decorative panel attached to the lower surface of the casing body,
The casing body includes a turbo fan, a heat exchanger disposed so as to surround the outer periphery of the turbo fan, and a drain pan disposed along the lower side of the heat exchanger,
In the drain pan, an air suction passage leading to the turbo fan is disposed in the central portion, and an air blowing passage for conditioned air that has passed through the heat exchanger extends along each side of a virtual quadrangle surrounding the air suction passage. It is provided in four places,
In the above-mentioned decorative panel, in the ceiling-embedded air conditioner provided with an air suction port that communicates with the air suction passage and an air blowout port that communicates with the air blowout passage,
Each of the air outlet passages has a pair of long side walls arranged in parallel at predetermined intervals along each side of the virtual quadrangle, and a pair of short side walls that connect ends of the long side walls. It is formed in a rectangular parallelepiped shape,
An air flow guide vane for directing a part of the air flow of the conditioned air toward the short side of the air outlet is provided in each air outlet passage. Machine.   The air flow guide vane directs a part of the conditioned air blown air flow toward one short side of the air outlet and the other short side of the air outlet. The ceiling-embedded air conditioner according to claim 1, wherein a second airflow guide vane is provided in each of the air blowing passages.   The airflow guide vane includes a base plate disposed along the long side wall, and a plurality of guide fins that are vertically arranged from the base plate and disposed in parallel with each other at a predetermined interval. Each guide fin is a flat plate in which the upstream base end along the blown air flow is parallel to the flow direction of the air flow, and the downstream tip is inclined in an arc shape in the same direction with a predetermined curvature. The ceiling-embedded air conditioner according to claim 1 or 2, characterized in that   4. The guide fin according to claim 3, wherein the width of the base end portion is equal to the width between the long side walls, and the width gradually decreases toward the tip end portion. Ceiling-mounted air conditioner.   The base end portion formed in a flat plate shape parallel to the air flow has a length of 1/3 of the passage length of the air blowing passage, and is formed in an arc shape with respect to the air flow. 5. The ceiling-embedded air conditioner according to claim 3, wherein the tip has a length that is 2/3 of the length of the air blowing passage.   6. The locking piece for attaching the said airflow guide vane to the said long side wall of the said air blowing path is provided in the upper end of the said base board, The any one of Claim 3 thru | or 5 characterized by the above-mentioned. The ceiling-embedded air conditioner described.   In the corner portion of the decorative panel, an air guide passage is formed between adjacent end portions of the adjacent air outlets. The ceiling-embedded air conditioner according to any one of claims 1 to 6, wherein a part of the blown air flow is blown toward the air guide passage. Each air outlet is provided with a wind direction plate having an inclined portion that covers half of the air guide passage at both ends, and the air direction plate is opened and closed on one short side wall side of each air outlet passage. Stepping motor is provided,
Of the first and second airflow guide vanes, the second airflow guide vane is disposed on one short side wall side of the air blowing passage where the stepping motor is provided, and the first airflow guide vane The ceiling-embedded air conditioner according to claim 2, wherein the ceiling-embedded air conditioner is disposed on the other short side wall side of the air blowing passage.   The inclination direction of each guide fin on the first airflow guide vane side and the inclination direction of each guide fin on the second airflow guide vane side are directions away from each other, and the first airflow guide vane with respect to the virtual horizontal plane The inclination angle of each guide fin on the side is θ1, and the inclination angle of each guide fin on the second airflow guide vane side with respect to a virtual horizontal plane is θ2, and θ1 <θ2. Embedded ceiling air conditioner.