JP6659991B2 - Ceiling-mounted air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner embedded between a ceiling slab and a ceiling panel, and more specifically, to a ceiling-embedded air conditioner having a blowing structure for blowing air from a decorative panel in all directions. Concerning the harmonic machine.

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

  However, in the conventional ceiling-mounted type air conditioner, the air outlets are arranged at four places along the four sides of the decorative panel, and the conditioned air passing through the heat exchanger is mainly discharged from each side of the decorative panel at four points. Since air is blown out in the four directions and no airflow flows at the four corners (corner parts), temperature unevenness is likely to occur at room temperature.

  Therefore, in the ceiling-embedded air conditioner described in Patent Literature 1, in addition to providing an air blowing passage around the entire periphery of the drain pan in the housing, in addition to the air blowing outlets arranged along the four sides of the decorative panel, Auxiliary outlets are also provided at the corners of the decorative panel to connect the adjacent ends of the air outlets, and the air outlets are formed in an octagonal annular shape, and a wind direction plate is arranged at each of them, so that almost all the air outlets are provided. Air can be blown in the direction.

Japanese Patent No. 4052264

  However, according to the prior art of Patent Document 1, the air outlets are formed in an octagonal annular shape, and the wind direction plates are arranged in each of them, so that the structure is inevitably complicated, and the number of parts and the number of assembly steps are inevitably increased. Increases, which is not preferable in terms of cost.

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

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

In order to solve the above-described problems, the present invention has a casing main body buried in a ceiling, and a decorative panel attached to a bottom surface of the casing main body,
In the casing body, a turbo fan, a heat exchanger arranged to surround the outer periphery of the turbo fan, and a drain pan arranged along the lower side of the heat exchanger,
In the drain pan, an air suction passage leading to the turbo fan is disposed at a central portion, and an air blowing passage for conditioned air passing through the heat exchanger extends along each side of a virtual square surrounding the air suction passage. Are provided in four places,
In the decorative panel, in the ceiling embedded air conditioner provided with an air suction port communicating with the air suction passage, and an air outlet communicating with the air blowing passage,
At each corner between the adjacent air outlets of the decorative panel, a wind guide passage is provided between the ends of the adjacent air outlets and communicates with the air outlets. In the air outlet, a wind direction plate having an inclined portion for guiding a part of the conditioned air blown out from the air outlet to the air guide passage is rotatably provided,
Each of the air blowing passages has a pair of long side walls arranged at predetermined intervals in parallel along each side of the virtual rectangle, and a pair of short side walls connecting ends of the long side walls. It is formed in a rectangular parallelepiped shape,
In each of the air blowing passages, a part of the blown air flow of the conditioned air is directed from the one short side of the air outlet to the one inclined portion of the wind direction plate on the one short side wall side. A first airflow guide vane is disposed, and a part of the blown air flow of the conditioned air is directed from the other short side of the air outlet to the other inclined portion of the wind direction plate on the other short side wall side. A second airflow guide vane to be displaced is arranged,
Each of the first and second airflow guide vanes is provided with a base plate arranged along the long side wall, and a plurality of airflow guide vanes which are vertically set up from the base plate and arranged in parallel with each other at a predetermined interval. A guide fin, and among the plurality of guide fins, a guide fin that is farthest from the short side wall in terms of distance is defined as an outermost guide fin,
A is the distance from the one short side wall to the outermost guide fin of the first airflow guide vane, B is the distance from the other short side wall to the outermost guide fin of the second airflow guide vane. When the length of the long side wall of the blowing passage is C, the first and second airflow guide vanes are:
(A + B) / C <0.5
Together is provided at a position satisfying,
Each of the guide fins is at least partially equal in width to the width between the long side walls, and a part of the blown air flow of the conditioned air is supplied from the one short side of the air outlet to the wind direction plate. It is characterized in that it is formed in an arc shape with a predetermined curvature so as to face one inclined portion .

  As a more preferred embodiment, each of the airflow guide vanes is configured such that a lower end portion of each of the guide fins is located on the same plane as an opening surface of an outflow side opening of the air blowing passage, or is located inside the passage from the opening surface. Is provided.

  According to the present invention, the length of the central air guide passage formed between the first airflow guide vane and the second airflow guide vane is equal to or more than の of the length C of the long side wall of the air blowing passage. As a result, the air flowing through the central air guide passage can be efficiently blown out in all directions without decreasing the wind speed.

1 is an external perspective view of a ceiling-mounted air conditioner according to an embodiment of the present invention. Sectional drawing of the principal part of the said ceiling embedded type air conditioner. FIG. 3 is an exploded perspective view of the decorative panel as viewed from the bottom side. (A) Front view, (b) Plan view, (c) Bottom view, (d) Left side view, and (e) Central longitudinal sectional view of a wind direction board. The front view which looked at the embedded ceiling type air conditioner with the wind direction board open at the time of operation from the bottom side (ceiling panel side). The perspective view which expanded the corner 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 side (ceiling panel side). The enlarged front view which looked at the air blowing passage from the bottom side (ceiling panel side). FIG. 9 is a sectional view taken along line AA of FIG. 8. The perspective view which expanded the vicinity of the inflow side opening part of the air blowing passage of the drain pan. The (a) perspective view which looked at the 1st airflow guide vane from the front side, (b) the perspective view seen from the back side, (c) front view, and (d) bottom view. (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 of the 2nd airflow guide vane. FIGS. 7A and 7B are a perspective view and a partial cross-sectional view illustrating a method of attaching an airflow guide vane to an air blowing passage. FIGS.

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

  The casing body 2 has a square 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 open. Consists of a box-shaped container. A heat insulating material 23 made of, for example, styrene foam is provided on the inner peripheral surface of the casing body 2.

  At each of the corners of the casing body 2, hanging brackets 4 are provided at a total of four places, and the hanging brackets 4 are fixed to hanging bolts (not shown) suspended from the ceiling, thereby being embedded in the ceiling. The air conditioner 1 is suspended from the ceiling.

  As shown in FIG. 2, a turbo fan 24 as a blower is disposed substantially at the center of the inside of the casing main body 2, and a heat exchanger 25 is provided around the turbo fan 24 so as to surround the turbo fan 24. For example, they are arranged in a square frame shape.

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

  At the lower side of the heat exchanger 25, a drain pan 6 that receives dew water generated by the heat exchanger 25 during the cooling operation is provided. In this embodiment, the drain pan 6 is made of styrene foam resin, and has a drain pan main body 61 having a dew receiving portion 66 and an air blowing passage for guiding the conditioned air passing through the heat exchanger 25 to the air outlet 32 of the decorative panel 3. 64. On the heat exchanger 25 side of the drain pan main 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. In the air suction passage 63, 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.

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

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

  The air blowing passage 64 includes a pair of long side walls 64a, 64b, which are parallel to each other along the side plates 22a to 22d of the casing main body 2 and are arranged to face each other at a predetermined interval. , 64b is formed in a rectangular parallelepiped shape surrounded by a pair of short side walls 64c, 64d formed between the ends of the casing body 64b, and penetrates in the vertical direction of the casing body 2 (in FIG. 8, the direction perpendicular to the plane of 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. Referring again to FIGS. 1 to 3, decorative panel 3 is a flat rectangular frame, and is screwed to the bottom surface of casing body 2.

  The decorative panel 3 has a square-shaped air inlet 31 in the center, and rectangular air outlets 32 are arranged at four locations along four sides of the air inlet 31. The air suction port 31 is provided with the suction grille 5 detachably.

  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 surface thereof. In this embodiment, the suction grille 5 is attached to the decorative panel 3 via a suction grille 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 up-down direction, and is opened in a rectangular shape when viewed from the bottom. Each air outlet 32 is arranged in parallel along each side of a virtual rectangle Q (two-dot chain line shown in FIG. 5) so as to surround four sides of the air inlet 31.

  At the corners 36 where the ends of the air outlets 32 face each other, four air guide passages 34 are provided at four locations for guiding the air blown out from the adjacent air outlets 32 to the corners 36 of the decorative panel 3. Have 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 has a longitudinal axis of one air outlet 32 and a longitudinal direction of the other air outlet passage 32. Are formed in an L-shape perpendicular to each other.

  A wind direction plate 33 is rotatably arranged at each air outlet 32. 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 at both ends of the straight portion 331. And inclined portions 332 and 332 that cover the air guide passage 34.

  The straight portion 331 has a convex curved surface whose front side (upper side in FIG. 4 (e)) is gently curved, and a concave curved surface whose lower side (lower surface in FIG. 4 (e)) is gently curved in accordance with the front surface. It is formed so that it becomes.

  The inclined portion 332 has a convex curved surface on the front side and a concave curved surface on the back side, similar to the linear portion 331, and the concave curved surface on the back side is such that air is guided toward the tip 332 a of the inclined portion 332. It has become.

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

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

  A stepping motor 35 for rotating each wind direction plate 33 is provided in each wind guide passage 34. In this embodiment, the stepping motor 35 is provided at one location (a total of four locations) corresponding to one wind direction plate 33, and in this embodiment, one short side (the air It is provided adjacent to the short side wall 64c of the blowing 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 this time, the inclined portions 332 of the adjacent wind direction plates 33 are butted against each other, so that the respective air guide passages 34 are also covered and concealed together.

  Also, 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 linear portion 331 of the wind direction plate 33, and is blown toward the room from four sides at a predetermined blowing angle.

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

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

In the present invention, a part of the air flowing through the air blowing passage 64 is forced inside the air blowing passage 64 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 out from each corner portion 36. An airflow guide vane 7 for blowing out toward the side of the air outlet 62 (toward the inclined portion 332 of the wind direction plate 33) is provided. Each airflow guide vane 7 is made of a synthetic resin, and its surface is preferably subjected to a flocking process for preventing dew condensation.

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

  For convenience of explanation, the upstream side (the inflow side of the air blowing passage 64) in FIG. 12C (FIG. 13C) is the base end side, and the lower end in FIG. 12C (FIG. 13C). The side (outflow side of the air blowing passage 64) will be described as the front end side, and the left-right direction in FIG. 12 (c) (FIG. 13 (c)) 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 7 a is arranged in parallel along the long side wall 64 a of the air suction passage 64 on the casing body 2 side, and perpendicularly from the surface of the base plate 71 a. There are provided three guide fins 72a, 73a, 74a to be erected.

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

  The first guide fins 72a are vertically erected 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 vertically set from substantially 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 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 screwed portion 66 of the air blowing passage 64 is provided. The locking pieces 75a are erected perpendicularly to the base plate 71a from the upper end of the back surface of the base plate 71a (the upper end on the near side in FIG. 12B) and extend to both ends in the width direction of the base plate 71a. It is a tongue piece of equal width.

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

  Next, the first to third guide fins 72a, 73a, 74a are formed of flat base portions 721a, 731a, 741a parallel to the flow direction of the air flow, and the base ends 721a, 731a, 741a. Tip portions 722a, 732a, and 742a that are inclined in the same direction at predetermined curvatures from the lower ends toward the downstream side in the same direction are provided. In this embodiment, the tip portions 722a, 732a, 742a of the first to third guide fins 72a, 73a, 74a extend obliquely downward to the left at an inclination angle θ1 of 60 ° with respect to the virtual horizontal plane H in the air flow direction. On the other hand, it is an arc surface having a shallow inclination angle. In this embodiment, the virtual horizontal plane H is a plane orthogonal to the air flow direction of the air blowing 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, air guide paths V1 are formed.

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

  According to this, in the first to third guide fins 72a, 73a, 74a, at the base ends 721a, 731a, 741a of the length L1a, a gap is formed between the long side wall 64a and the long side wall 64b facing the long side wall 64b. There is almost no gap between them, and the gap gradually increases between the lengths L2a of the tip portions 722a, 732a, and 742a. Therefore, the air guided to the air guide path V1 is first forcibly guided along the side surfaces of the first to third guide fins 72a, 73a, 74a in a diagonally lower left direction. By increasing the gap, the air on the outflow side is united into one, and the surrounding air is entrained and blown out obliquely.

  Next, as shown in FIGS. 13A to 13D, the second airflow guide vane 7b has substantially the same form as the above-described first airflow guide vane 7a, and the second airflow guide vane 7b is located on the casing main body 21 side of the air suction passage 64. A base plate 71b arranged in parallel along the long side wall 64a, and three guide fins 72b, 73b, 74b standing upright 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 vertically erected 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 vertically set from substantially 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 parallel to each other with 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 screw portion 66 of the air blowing passage 64 is provided. The locking pieces 75b are erected perpendicularly to the base plate 71b from the upper end of the rear surface of the base plate 71b (the upper end on the near side in FIG. 13B) and extend to both ends in the width direction of the base plate 71b. It is a tongue piece of equal width.

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

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

  The first to third guide fins 72b, 73b, 74b are arranged at equal intervals, and 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. , An air guide path V2 is formed.

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

  According to this, in the first to third guide fins 72b, 73b, 74b, at the base ends 721b, 731b, 741b of the length L1b, a gap is formed between the long side wall 64a and the long side wall 64b facing the long side wall 64a. There is almost no gap, and the gap gradually increases between the lengths L2b of the tip portions 722b, 732b, and 742b. Therefore, the air guided to the air guide path V2 is first forcibly guided along the side surfaces of the first to third guide fins 72b, 73b, 74b obliquely downward to the right and toward the outflow side. By increasing the gap, the air on the outflow side is united into one, and the surrounding air is entrained and blown out 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 or more, 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.

  With reference to FIG. 10, each airflow guide vane 7 (7a, 7b) is provided at the tip 722a, 732a, 742a (722b, 732b, 742b) of each guide fin 72a, 73a, 74a (72b, 73b, 74b). The distal end (the lower end in FIG. 10) is provided so as to be located inside the opening surface F2 of the outflow-side opening 64B of the air blowing passage 64. According to this, by disposing 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 are not damaged. Since it does not protrude from the outflow side opening 64B on the bottom surface B side, it is easy to pack.

  As shown in FIGS. 8 and 9, of the two types of airflow guide vanes 7a and 7b having different inclination angles, the first airflow guide vane 7a is arranged at a predetermined distance 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 arranged at a predetermined distance 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. I have. A central air guide passage V5 for blowing 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 vanes 7a is forcibly bent to the left through the air guide path V1, and is blown obliquely downward to the left. At this time, the air flow descending through the air passage V3 located on the left side is taken in together, so that the air is blown out from the air outlet 32 toward the left air guide passage 34.

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

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

  According to this, when the air passes through the guide fins 72b to 74b in which the angle of the second airflow guide vane 7b is deep, the flow rate of the airflow slightly decreases, but the amount of air flowing toward the air guide passage 34 is surely reduced. As a result, stable blowing from the corner portion 36 can be performed.

  That is, as shown in FIG. 5, the first airflow guide of one of the adjacent air blowing passages 64 is provided at the corner portion 36 where the ends of the four air blowing passages 64 arranged so as to surround the four sides face each other. The air flow having a small angle from the vane 7a and the air flow having a large angle from the second air flow guide vane 7b in the other adjacent air blowing passage 64 merge and are blown out from the corner portion 36 toward the room. .

Further, as a more preferable embodiment of the arrangement of the airflow guide vanes 7a and 7b, the distance from one short side wall 64c to the outermost guide fin (third guide fin 74a) of the first airflow guide vane 7a is A, and the other is. When the distance from the short side wall 64d to the outermost guide fin (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
(A + B) / C <0.5
Is provided at a position that satisfies the following conditions.

  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 is less than or equal to 1/2, and the wind speed of the air flowing through the central air guide passage V5 decreases, so that efficient blowing in all directions cannot be performed.

  As shown in FIG. 11, the air flow guide vanes 7a and 7b are screwed to the edge of the opening 64A on the inflow side of the air blowing passage 64, and the opening on the inflow side of the air blowing passage 64. The drain sheet 62 of 64 </ b> A (the upper surface side in FIG. 6) is provided with a screwing portion 66 for screwing each airflow guide vane 7.

  As shown in FIG. 14A, the screwing portion 66 is a recess formed by using the drain sheet material of the drain sheet 62 to be recessed one step lower in the thickness direction. Two openings are provided at predetermined intervals in the opening 64A on the inflow side on the side wall 64a side.

  Each of the screwing portions 66 is a recess having the same shape, and a screwing hole 661 is formed at the center thereof. At the corners between the bottom wall and both side walls of the screwing portion 66, locking concave portions 662 and 662 are provided to which locking claws 753 and 753 provided on the airflow guide vane 7 are locked.

  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 so as to project in a column shape toward the drain pan main body 61 side.

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

  First, in a state in which one locking claw 753 of the locking piece 75a is locked in one locking recess 662, the other locking claw 753 is pushed into the locking recess 662, so that the locking recess 662 is inserted into the locking recess 662. The locking piece 75a is temporarily fixed.

  Next, a screw S is inserted into the screw hole 752 of the locking piece 75a of the first airflow guide vane 7a and screwed together with the screw hole 661 of the screw portion 66. As a result, the upper end surface of the first airflow guide vane 7a and the upper end surface of the drain pan 6 are flush with each other. . According to this, since the upper end surface of the first airflow guide vane 7a and the upper end surface of the drain pan 6 are on the same plane, the sealing material 67 can be easily attached to the surface, and the adhesion of the sealing material 7 can be enhanced.

  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, an opening 64A on the inflow side of the air blowing passage 64 (the upper surface side in FIG. 11). Are provided with columns 65 for supplementing the mechanical strength of the air blowing passage 64.

  The strut 65 is bridged between substantially central portions of the opposed long side walls 64a and 64b such that at least a part thereof protrudes above the opening face F1 on the inflow side of the air blowing passage 64. With this configuration, 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 obstructed, so that a decrease in the amount of air blown out from the air outlet 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. Although the ends of the outlets 32 collect the airflow from two directions at the adjacent corners 36, at least one of the airflow guide vanes 7, and more preferably, only the second airflow guide vane 7b may be provided. According to this, a necessary and sufficient amount of air can be obtained only by sending the wind to the corner portion 36 with only the second airflow guide vane 7b capable of directly sending the air toward the wind guide passage 34.

  As described above, according to the present invention, the length of the central air guide passage formed between the first airflow guide vane and the second airflow guide vane is the length C of the long side wall of the air blowing passage.以上 or more, the wind velocity of the air flowing through the central air guide passage does not decrease, and efficient blowing can be performed uniformly in all directions.

DESCRIPTION OF SYMBOLS 1 Ceiling embedded type air conditioner 2 Casing main body 21 Top plate 22a-22d Side plate 23 Insulation material 24 Turbo fan 25 Heat exchanger 25a, 25b Refrigerant piping 27 Bellmouth 28 Electrical component box 3 Decorative panel 31 Air inlet 32 Air blowing Outlet 33 Wind direction plate 34 Wind guide passage 35 Stepping motor 4 Suspension bracket 5 Suction grill 51 Suction hole 52 Dust filter 6 Drain pan 61 Drain pan main body 62 Drain sheet 63 Air suction passage 64 Air blowing passage 64a, 64b Long side wall 64c, 64d Short Side wall 64A Inflow side opening 64B Outflow side opening 65 Prop 66 Screw stop 7 Air flow guide vane 7a First air flow 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 (2)

Having a casing body embedded in the ceiling, and a decorative panel attached to the bottom surface of the casing body,
In the casing body, including a turbo fan, a heat exchanger arranged to surround the outer periphery of the turbo fan, and a drain pan arranged along the lower side of the heat exchanger,
In the drain pan, an air suction passage leading to the turbo fan is arranged at a central portion, and an air blowing passage for conditioned air passing through the heat exchanger extends along each side of a virtual square surrounding the air suction passage. Are provided in four places,
In the decorative panel, in the ceiling embedded air conditioner provided with an air suction port communicating with the air suction passage, and an air outlet communicating with the air blowing passage,
At each corner between the adjacent air outlets of the decorative panel, a wind guide passage is provided between the ends of the adjacent air outlets and communicates with the air outlets. In the air outlet, a wind direction plate having an inclined portion for guiding a part of the conditioned air blown out from the air outlet to the air guide passage is provided rotatably,
Each of the air blowing passages has a pair of long side walls arranged at predetermined intervals in parallel along each side of the virtual rectangle, and a pair of short side walls connecting ends of the long side walls. It is formed in a rectangular parallelepiped shape,
In each of the air blowing passages, a part of the blown air flow of the conditioned air is directed from the one short side of the air outlet to the one inclined portion of the wind direction plate on the one short side wall side. A first airflow guide vane is disposed, and a part of the blown air flow of the conditioned air is directed from the other short side of the air outlet to the other inclined portion of the wind direction plate on the other short side wall side. A second airflow guide vane to be displaced is arranged,
Each of the first and second airflow guide vanes is provided with a base plate arranged along the long side wall, and a plurality of airflow guide vanes which are vertically set up from the base plate and arranged in parallel with each other at a predetermined interval. A guide fin, and among the plurality of guide fins, a guide fin that is farthest from the short side wall in terms of distance is defined as an outermost guide fin,
A is the distance from the one short side wall to the outermost guide fin of the first airflow guide vane, B is the distance from the other short side wall to the outermost guide fin of the second airflow guide vane. When the length of the long side wall of the blowing passage is C, the first and second airflow guide vanes are:
(A + B) / C <0.5
Together is provided at a position satisfying,
Each of the guide fins is at least partially equal in width to the width between the long side walls, and a part of the blown air flow of the conditioned air is supplied from the one short side of the air outlet to the wind direction plate. An embedded ceiling air conditioner characterized by being formed in an arc shape with a predetermined curvature so as to face one inclined portion .
  Each of the airflow guide vanes is provided such that a lower end portion of each of the guide fins is located on the same plane as an opening surface of an outflow-side opening of the air blowing passage or inside the passage from the opening surface. The ceiling-mounted air conditioner according to claim 1, wherein: