JP6891417B2 - Ceiling embedded air conditioner - Google Patents

Description

The present invention relates to a ceiling-embedded air conditioner installed on the ceiling of a room, and more specifically to a technique for controlling the blowing direction of heat-exchanged conditioned air.

In the ceiling-embedded air conditioner, the box-shaped casing body is embedded in the space formed between the ceiling slab and the ceiling panel. A square decorative panel is attached to the bottom surface of the casing body (the surface facing the room), and usually an air suction port is provided in the center and an air outlet is provided around the air suction port.

Inside the casing body, a turbo fan is provided in the central part thereof, a heat exchanger is arranged so as to surround the turbo fan, and a drain pan as a dew pan is arranged along the lower part of the heat exchanger. (See, for example, Patent Document 1).

In a normal ceiling-embedded air conditioner, 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 directed from each side of the decorative panel in four directions. Since the air is blown out toward the four corners (corners) and no air flow flows, 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 circumference of the drain pan in the housing, and in addition to the air outlets arranged along the four sides of the decorative panel. , Auxiliary air outlets connecting the adjacent ends of each air outlet are also provided at the corners of the decorative panel, the air outlets are made into an octagonal ring shape, and a wind direction plate is placed on each of them to create a wide wind direction. As a result, conditioned air is blown out from the four sides and four corners of the decorative panel in almost all directions.

Japanese Patent No. 4052264

However, according to the prior art of Patent Document 1, since the air outlet is made into an octagonal ring shape and the wind direction plate is arranged in each of them, the structure is inevitably complicated, and the number of parts and the number of assembly steps are inevitably complicated. There is a problem that the number increases and the cost is not preferable.

Therefore, the applicant has designated a ceiling-embedded air conditioner as Japanese Patent Application No. 2015-070936 (referred to as a prior invention) that can efficiently blow out conditioned air in all directions with fewer parts and man-hours. is suggesting.

That is, in this prior invention, a part of the conditioned air blowing air flow is made into the air outlet of the decorative panel in the air blowing passage formed in the elongated rectangular parallelepiped shape including the pair of long side walls and the pair of short side walls. By providing an airflow guide vane that directs the air to the short side of the air-conditioned air, it is possible to blow out conditioned air in all directions without using a complicated structure.

According to the prior invention, as described above, the conditioned air can be blown out in almost all directions as a wide wind direction, but since the airflow guide vane is fixed at an angle facing the short side of the air outlet, the air It is not possible to strongly blow out conditioned air in the direction of going straight from the air outlet (hereinafter referred to as straight wind direction).

Therefore, there is a possibility that problems such as a decrease in reachability of hot air to the floor surface during heating operation and a decrease in reachability of cold air to a location away from the ceiling-embedded air conditioner during cooling operation may occur. .. Further, in the ceiling-embedded air conditioner described in Patent Document 1, the harmonized air blown out from a plurality of air outlets cannot be directed to a specific place in the air-conditioned space (hereinafter referred to as spot wind direction).

Therefore, it is not possible to allow or prevent the conditioned air from reaching a specific place in the conditioned space (for example, a place where a plurality of users are unevenly present). When the above problems occur, there is a problem that the comfort required by the user cannot be satisfied.

Therefore, an object of the present invention is to provide a ceiling-embedded air conditioner that can satisfy the comfort required by the user by switching the method of blowing out the conditioned air to one of a wide wind direction, a straight wind direction, and a spot wind direction. is there.

In order to solve the above-mentioned problems, the present invention has a casing main body embedded in the ceiling and a decorative panel attached to the lower surface of the casing main body, and in the casing main body, a turbo fan and the turbo A heat exchanger arranged so as to surround the outer periphery of the fan and a drain pan arranged along the lower end of the heat exchanger are included, and the drain pan has an air suction passage leading to the turbo fan arranged in a central portion. In addition, air outlet passages for harmonized air passing through the heat exchanger are provided at four locations along each side of the virtual square surrounding the air suction passage, and the decorative panel has the air suction passage. In a ceiling-embedded air exchanger in which an air suction port communicating with the passage and an air outlet communicating with the air outlet passage are provided and an air direction plate is arranged in the air outlet.
Each of the air blowing passages has a pair of long side walls arranged in parallel along each side of the virtual quadrangle at predetermined intervals, and a pair of short side walls connecting the ends of the long side walls. It is formed in an elongated rectangular parallelepiped shape, and the first airflow guide vane that changes the blowing direction of the harmonized air passing through the air blowing passage can be rotated on one of the short side walls in each of the air blowing passages. A second airflow guide vane for changing the blowing direction of the harmonized air passing through the air blowing passage is rotatably provided on the other short side wall side of each of the air blowing passages .
One of wide wind direction, straight wind direction, and spot wind direction can be selected. At the time of the wide wind direction, the leeward end of the first airflow guide vane and the leeward end of the second airflow guide vane are separated from each other. At the time of the straight wind direction, both the first airflow guide vane and the second airflow guide vane rotate in a direction perpendicular to the long axis along the long side wall of the air blowing passage, and the spot. At the time of the wind direction, both the leeward end of the first airflow guide vane and the leeward end of the second airflow guide vane rotate toward one of the short side walls .

According to a preferred embodiment of the present invention, each of the airflow guide vanes includes a plurality of plate-shaped guide fins driven by a motor and rotating about a rotation axis orthogonal to the long side wall.

More preferably, the plurality of guide fins are connected so as to be interlocked with each other via a link arm.

In the present invention, the angle and / or direction of the leeward end of the first airflow guide vane and the second airflow guide vane can be adjusted individually.

Further, in the present invention, as a preferred embodiment, a wind guide passage is formed between the adjacent ends of the adjacent air outlets at the corners of the decorative panel, and the first airflow guide vane and the second airflow are formed. It also includes a mode in which a part of the conditioned air blown air flow is blown toward the air guide passage from each of the adjacent air blowout passages by a guide vane.

According to the present invention, by appropriately rotating the airflow guide vane, the blowing direction of the conditioned air can be set to the wide wind direction, the straight wind direction, and the spot wind direction, so that the comfort required by the user can be satisfied.

The external perspective view which shows the ceiling-embedded type air conditioner which concerns on one Embodiment of this invention. A schematic cross-sectional view showing the internal structure of the ceiling-embedded air conditioner. 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 vertical sectional view of the wind direction plate. The front view which shows the state which the wind direction plate is open at the time of operation of the said ceiling-embedded air conditioner. FIG. 5 is an enlarged perspective view of a corner portion of FIG. A front view showing a state in which the decorative panel is removed and the main body casing is viewed from the bottom side. A perspective view of the air blowing passage from the bottom side of the main body casing. Schematic perspective view showing an airflow guide vane. The schematic diagram which shows the wind direction at the time of wide blowing. The schematic diagram which shows the rotation position of the airflow guide vane at the time of wide blowing. The schematic diagram which shows the wind direction at the time of straight blowing. The schematic diagram which shows the rotation position of the airflow guide vane at the time of straight blowing. The schematic diagram which shows the wind direction at the time of a spot blowout. The schematic diagram which shows the rotation position of the airflow guide vane at the time of spot blowing. The schematic diagram which shows the wind direction at the time of spot blowing by another aspect.

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

First, referring to FIGS. 1 and 2, the ceiling-embedded air conditioner 1 according to the present embodiment is a rectangular parallelepiped casing main body housed in a space formed between the ceiling slab and the ceiling panel T. 2 and a decorative panel 3 attached to the bottom surface B of the casing main body 2.

The casing main body 2 has a square top plate 21 and four side plates 22a to 22d extending downward from each side thereof, and is formed from a box-shaped container in which the bottom surface B on the side facing the room is open. Become. A heat insulating material 23 made of styrofoam or the like is provided on the inner peripheral surface of the casing main body 2.

Hanging metal fittings 4 are provided at four points in total at each corner of the casing main body 2, and the hanging metal fittings 4 are embedded in the ceiling by locking the hanging metal fittings 4 to hanging bolts (not shown) suspended from the ceiling. The type air conditioner 1 is suspended and fixed to the ceiling.

A turbofan 24 as a blower is arranged substantially in the center of the inside of the casing main body 2, and a heat exchanger 25 is arranged in a square frame shape so as to surround the turbofan 24 on the outer periphery of the turbofan 24. ..

With reference to FIG. 7, in the casing main body 2, one corner of the four corners (in this example, the corner between the ends of the side plate 22a and the side plate 22d) faces from the outside to the inside. A recess is formed so as to be recessed one step, and the recess P is provided with a pipe lead-out portion P of the refrigerant pipes 25a and 25b of the heat exchanger 25.

At the lower end of the heat exchanger 25, a drain pan 6 for receiving the condensed water generated by the heat exchanger 25 during the cooling operation is provided along the heat exchanger 25. In the present embodiment, the drain pan 6 is made of styrofoam resin, and is an air outlet passage that guides the conditioned air that has passed through the heat exchanger 25 and the drain pan main body 61 having the dew receiving portion 66 to the air outlet 32 of the decorative panel 3. It has 64 and. A resin drain sheet 62 is arranged on the heat exchanger 25 side of the drain pan main body 61.

The drain pan 6 is formed in a square frame shape in a plan view, and the inside of the square frame is an air suction passage 63 communicating with the air suction port 31 of the decorative panel 3. In the air suction passage 63, a bell mouth 27 is provided to guide the air sucked from the air suction port 31 to the suction side of the turbofan 24.

As shown in FIG. 2 , an electrical component box 28 is provided on the air suction port 31 side of the bell mouth 27. In the present embodiment, the electrical component box 28 is formed in an L shape and is arranged on the corner side near the pipe lead-out portion P.

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. That is, in the air blowing passage 64, the first air blowing passage 64A arranged along the side plate 22a, the second air blowing passage 64B arranged along the side plate 22b, and the third air arranged along the side plate 22c. The blowout passage 64C and the fourth air blowout passage 64D arranged along the side plate 22d are included, but when it is not necessary to distinguish between these air blowout passages 64A to 64D, they are collectively referred to as an air blowout passage 64.

With reference to FIGS. 7 and 8, the air blowing passages 64 (64A to 64D) are a pair of long sides that are parallel to each side plate 22a to 22d of the casing main body 2 and are arranged to face each other at predetermined intervals. An elongated rectangular parallelepiped elongated hole surrounded by walls 641 and 642 and a pair of short side walls 643 and 644 formed between the ends of the long side walls 641 and 642 in the vertical direction of the casing body 2 (FIG. In No. 7, it penetrates in the direction perpendicular to the paper surface).

The outflow-side opening of the air outlet passage 64 communicates with each air outlet 32 of the decorative panel 3. Since the drain pan 6 is made of styrofoam resin, a reinforcing column 65 is laid between the long side walls 641 and 642 at the central portion of the air blowing passage 64. Since the air blowing passage 64 is an elongated elongated hole, the axis along the long side walls 641 and 642 is defined as the major axis X, and the axis orthogonal to this is defined as the minor axis Y.

With reference to FIGS. 1 to 3 again, the decorative panel 3 is a quadrangular flat frame and is screwed to the bottom surface of the casing main body 2.

The decorative panel 3 has an air suction port 31 opened in a square shape in the center, and rectangular air outlets 32 are arranged at four locations along the four sides of the air suction port 31. A suction grill 5 is detachably provided in 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 removal filter 52 is held on the back surface thereof. In the present embodiment, the suction grill 5 is attached to the decorative panel 3 via a suction grill frame 37 to which a heat insulating member 38 made of styrofoam is attached.

The air outlet 32 penetrates the decorative panel 3 in the vertical direction and is opened in a rectangular shape. Each air outlet 32 is arranged at four locations 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 suction port 31.

At the corners 36 (36a to 36d) where the ends of the air outlets 32 face each other, the air guide passage 34 that guides the air blown from the adjacent air outlets 32 to the corners 36 of the decorative panel 3 Is provided. A corner cover 360 is attached to each of the air guide passages 34.

The air guide passage 34 is a recessed groove that is recessed inward from the surface (bottom surface) of the decorative panel 3, and as shown in FIGS. 3 and 6, one of the adjacent air outlets is air blown. It is formed in an L shape in which the longitudinal axis of the outlet 32 and the longitudinal axis of the other air blowing passage 32 intersect.

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 integrally formed with a straight portion 331 formed linearly according to the shape of the air outlet 32 and at both ends of the straight portion 331. It is provided with inclined portions 332 and 332 that cover the air guide passage 34.

The straight portion 331 is a convex curved surface whose front surface side (upper surface side in FIG. 4E) is gently curved, and the back surface side (lower surface in FIG. 4E) is a concave curved surface gently curved according to the front surface. It is formed so as to be.

Like the straight portion 331, the inclined portion 332 has a convex curved surface on the front surface side and a curved surface on the back surface side, and the concave curved surface on the back surface side guides air toward the tip 332a 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 the present embodiment, the rotation shafts 333 are provided at the left and right ends and the center of the straight line portion 331, and are provided on the same axis in order to rotate the wind direction plate 33 in the vertical direction.

Two of the three rotating shafts 333 are locked to bearings (not shown) provided on the decorative panel 3. The remaining one rotary shaft 333 (rotary shaft 333M in this example) is connected to the rotary drive shaft of the 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 the present embodiment, the stepping motor 35 is provided at one location (four locations in total) corresponding to one wind direction plate 33, and in the present embodiment, one short side (air) of the air outlet 33 is provided. It is provided adjacent to the short side wall 64c side of the blowout passage 64).

According to this, when the operation is stopped, each wind direction plate 33 rotates upward and closes the air outlet 32 as shown in FIG. At that time, the inclined portions 332 of the adjacent wind direction plates 33 are butted against each other, so that the wind guide passages 34 are also hidden together.

Further, during operation, as shown in FIG. 5, each wind direction plate 33 rotates downward according to the operating condition, 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 is blown out from all four sides toward the room at a predetermined blowing angle as indicated by the arrow MF.

Further, the air blown out from the air guide passages 34 on both sides of the air outlet 32 is guided to the tip portion 332a along the inner peripheral surface of the inclined portion 332, and as shown by the arrow SF, the corners of the four corners of the decorative panel 3 It is blown out toward the room from the portions 36 (36a to 36d).

In this way, as shown in FIG. 5, in addition to the four directions from each side of the decorative panel 3, the harmonious air can be blown out in all directions (all eight directions) including the four corners 36. Although it is possible, in the present invention, the airflow guide vanes 7 are provided in the air blowing passages 64 (64A to 64D) so that the airflow (wind direction) according to the user's request can be obtained.

As shown in FIG. 9, the airflow guide vane 7 includes a plurality of guide fins 71, and in the present embodiment, three guide fins 71a, 71b, and 71c. When it is not necessary to distinguish between the guide fins 71a, 71b and 71c, the guide fins 71 are simply referred to as guide fins 71.

In the present embodiment, each guide fin 71 is formed in a substantially square plate shape, and the side faces facing the long side wall 641 and the long side wall 642 are on the long side walls 641 and 642, respectively. Rotating shafts 72, 72 that fit into bearing holes (not shown) are attached, and each guide fin 71 is provided along the major axis X direction in the air blowing passage 64 with the rotating shafts 72, 72 as fulcrums. It can rotate left and right (X direction shown in FIG. 8).

The guide fins 71a, 71b, 71c are connected to each other via the link arm 74 in parallel and at equal intervals. Rack teeth 74a are formed on the link arm 74. Flat plates (flat plates) are used for the guide fins 71a, 71b, and 71c, but for example, the rotating tip side (leeward side) may be curved to the right or left side.

According to this embodiment, a stepping motor 75 having a pinion gear 75a is used as a driving means of the airflow guide vane 7. The stepping motor 75 is housed in each corner portion 36 of the decorative panel 3 so that the pinion gear 75a meshes with the rack teeth 74a.

By driving the stepping motor 75, the guide fins 71a, 71b, and 71c rotate in the left-right direction at the same time. Instead of the pinion-rack mechanism, a rotation-linear motion conversion mechanism such as a crank mechanism may be used.

The ceiling-embedded air conditioner 1 has a control unit (both not shown) that performs various controls based on an instruction signal issued from the remote controller by the user's operation, and the control unit is an operation instruction signal from the remote controller. According to this, the stepping motor 35 for driving the wind direction plate 33, the stepping motor 75 for driving the airflow guide vane 7, and the like are controlled.

As shown in FIGS. 7 and 8, the airflow guide vane 7 in the ceiling-embedded air conditioner 1 of the present embodiment has one short side wall closer to 643 and the other short side wall for one air outlet 64. It is arranged at two locations near 644, and the airflow guide vane near one short side wall 643 is referred to as the first airflow guide vane 7a, and the airflow guide vane near the other short side wall 644 is referred to as the second airflow guide vane 7b. ..

Further, the ceiling-embedded air conditioner 1 according to the present embodiment has three wind direction selection items of "wide wind direction", "straight wind direction", and "spot wind direction from the corner portion".

When the wide wind direction is selected by the user, the control unit drives each stepping motor 75 and, as shown in FIGS. 10a and 10b, the first airflow guide vane 7a in each air blowing passage 64 (64A to 64D). (Guide fins 71a to 71c) are rotated toward the short side wall 643 side, whereas the second airflow guide vanes 7b (guide fins 71a to 71c) are rotated toward the short side wall 644 side.

As a result, the harmonized air passing through each air blowing passage 64 is substantially orthogonal to the long axis X from the central portion of each air blowing passage 64, that is, the portion where the first airflow guide vane 7a and the second airflow guide vane 7b do not exist. The straight airflow blown out in this way and the side airflow toward both short side walls of the air blowing passage 64 are distributed by the rotating first airflow guide vanes 7a and the second airflow guide vanes 7b. Therefore, as shown in FIG. 10a, a necessary and sufficient amount of blown air can be secured from each of the corner portions 36a to 36d, and harmonized air can be blown out in almost all directions. At this time, the wind direction plate 33 is opened at an angle such that the air blown from the air guide passage 34 is guided to the tip portion 332a along the inner peripheral surface of the inclined portion 332.

Next, when the straight wind direction is selected by the user, the control unit drives each stepping motor 75 and, as shown in FIGS. 11a and 11b, the first airflow in each air blowing passage 64 (64A to 64D). Both the guide vanes 7a and the second airflow guide vanes 7b have their guide fins 71a to 71c in the vertical direction substantially orthogonal to the long axis X.

As a result, most of the conditioned air passing through each air blowing passage 64, as shown in FIG. 11a, is substantially relative to the long axis X, including the location where the first airflow guide vane 7a and the second airflow guide vane 7b are present. Since the straight airflow is blown out at right angles, it is possible to obtain a warm airflow that reaches the floor surface firmly during the heating operation and a cold airflow that reaches a long distance without the cold air falling during the cooling operation. In this straight wind direction, the wind direction plate 33 is rotated so as to be a downward blowout during the heating operation, and is rotated so as to be a lateral blowout during the cooling operation.

At the time of this straight wind direction, even if the leeward side (lower end side in FIG. 11b) of the first airflow guide vane 7a and the second airflow guide vane 7b is rotated in a direction closer to each other than the vertical direction to throttle the straight airflow. Good.

Next, the case where the spot wind direction is selected by the user will be described. In the present embodiment, the spot wind direction exists in the first spot mode in which the conditioned air is blown out from the first corner portion 31a and the third corner portion 31c existing at one diagonal position, and at the other diagonal position. There is a second spot mode in which conditioned air is blown out from the second corner portion 31b and the fourth corner portion 31d. In any of the spot modes, the wind direction plate 33 is opened at an angle such that the air blown from the air guide passage 34 is guided to the tip portion 332a along the inner peripheral surface of the inclined portion 332.

When the spot wind direction of the first spot mode is selected by the user, the control unit controls the first airflow guide vane 7a and the second airflow guide vane 7b for the first air blowing passage 64A, as shown in FIGS. 12a and 12b. The guide fins 71a to 71c of the above are both rotated toward the short side wall 643 side closer to the first corner portion 36a, and for the fourth air blowing passage 64D, the first airflow guide vane 7a and the second airflow guide vane Both the guide fins 71a to 71c of 7b are rotated toward the short side wall 644 side closer to the first corner portion 36a.

Regarding the second air blowing passage 64B, the guide fins 71a to 71c of the first airflow guide vane 7a and the second airflow guide vane 7b are both rotated toward the short side wall 644 side closer to the third corner portion 36c. With respect to the third air blowing passage 64C, the guide fins 71a to 71c of the first airflow guide vane 7a and the second airflow guide vane 7b are both rotated toward the short side wall 643 side closer to the third corner portion 36c. Let me. In FIG. 12b, the guide fin rotating toward the short side wall 643 side is shown by a solid line, and the guide fin rotating toward the short side wall 644 side is shown by a chain line.

As a result, as shown in FIG. 12a, most of the conditioned air passing through the first air blowing passage 64A and the conditioned air passing through the fourth air blowing passage 64D is blown out from the first corner portion 36a, whereas the second Most of the conditioned air passing through the air blowing passage 64B and the conditioned air passing through the third air blowing passage 64C are blown out from the third corner portion 36c.

Next, when the spot wind direction of the second spot mode is selected by the user, the control unit receives the guide fins 71a of the first airflow guide vane 7a and the second airflow guide vane 7b for the first air blowing passage 64A. Both 71c are rotated toward the short side wall 644 side closer to the second corner portion 36b, and for the second air blowing passage 64B, the guide fins 71a of the first airflow guide vane 7a and the second airflow guide vane 7b are used. ~ 71c are both rotated toward the short side wall 643 side near the second corner portion 36b.

Regarding the third air blowing passage 64C, the guide fins 71a to 71c of the first airflow guide vane 7a and the second airflow guide vane 7b are both rotated toward the short side wall 644 side closer to the fourth corner portion 36d. With respect to the fourth air blowing passage 64D, the guide fins 71a to 71c of the first airflow guide vane 7a and the second airflow guide vane 7b are both rotated toward the short side wall 643 side closer to the fourth corner portion 36d. Let me.

As a result, as shown in FIG. 12c, most of the conditioned air passing through the first air blowing passage 64A and the conditioned air passing through the second air blowing passage 64B is blown out from the second corner portion 36b, whereas the third air blowing passage 64B is used. Most of the conditioned air passing through the air blowing passage 64C and the conditioned air passing through the fourth air blowing passage 64D will be blown out from the fourth corner portion 36d.

As described above, according to the present invention, air flow guide vanes 7a and 7b are provided on one short side wall 643 side and the other short side wall 644 side in each air blowing passage 64, and each of them is appropriately rotated. By moving, the direction of conditioned air is wide in all directions, warm air that reaches the floor firmly during heating, and cool air that reaches far without falling when cooling, straight wind direction, specific location It can be a spot wind direction that narrows the airflow only.

1 Ceiling-embedded air conditioner 2 Casing body 21 Top plate 22a to 22d Side plate 23 Insulation material 24 Turbo fan 25 Heat exchanger 25a, 25b Refrigerant piping 27 Bellmouth 28 Electrical equipment box 3 Decorative panel 31 Air suction port 32 Air blow Outlet 33 Wind direction plate 34 Air guide passage 35 Stepping motor 36 (36a to 36d) Corner part 4 Hanging bracket 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 passage 641, 642 Long side wall 643, 644 Short side wall 65 Strut 7 Air condition guide vane 7a First air conditioner guide vane 7b Second air conditioner guide vane 71 (71a, 71b, 71c) Guide fin

Claims (5)

It has a casing body embedded in the ceiling and a decorative panel attached to the lower surface of the casing body, and inside the casing body, a turbo fan and heat exchange arranged so as to surround the outer periphery of the turbo fan. A device and a drain pan arranged along the lower end of the heat exchanger are included, and the drain pan has an air suction passage leading to the turbo fan arranged in a central portion and has passed through the heat exchanger. Air blowing passages for harmonized air are provided at four locations along each side of the virtual square surrounding the air suction passage, and the decorative panel includes an air suction port communicating with the air suction passage and the air blowing passage. In a ceiling-embedded air exchanger in which an air outlet that communicates with the passage is provided and a wind direction plate is arranged in the air outlet.
Each of the air blowing passages has a pair of long side walls arranged in parallel along each side of the virtual quadrangle at predetermined intervals, and a pair of short side walls connecting the ends of the long side walls. It is formed in an elongated rectangular parallelepiped shape, and the first airflow guide vane that changes the blowing direction of the harmonized air passing through the air blowing passage can be rotated on one of the short side walls in each of the air blowing passages. A second airflow guide vane for changing the blowing direction of the harmonized air passing through the air blowing passage is rotatably provided on the other short side wall side of each of the air blowing passages .
One of wide wind direction, straight wind direction, and spot wind direction can be selected. At the time of the wide wind direction, the leeward end of the first airflow guide vane and the leeward end of the second airflow guide vane are separated from each other. At the time of the straight wind direction, both the first airflow guide vane and the second airflow guide vane rotate in a direction perpendicular to the long axis along the long side wall of the air blowing passage, and the spot At the time of the wind direction, the leeward end of the first airflow guide vane and the leeward end of the second airflow guide vane both rotate toward one of the short side walls. Built-in air conditioner. The first aspect of the present invention, wherein each of the air flow guide vanes includes a plurality of plate-shaped guide fins that are driven by a motor and rotate about a rotation axis orthogonal to the long side wall. Ceiling-embedded air conditioner. The ceiling-embedded air conditioner according to claim 2, wherein the plurality of guide fins are connected so as to be interlocked with each other via a link arm. The ceiling according to any one of claims 1 to 3, wherein the angle and / or direction of the leeward end of the first airflow guide vane and the second airflow guide vane can be adjusted individually. Embedded air conditioner. At the corners of the decorative panel, an air guide passage is formed between the adjacent ends of the adjacent air outlets, and the air outlets adjacent to each other by the first airflow guide vanes and the second airflow guide vanes. The ceiling-embedded air conditioner according to any one of claims 1 to 4, wherein a part of the blown air flow of the conditioned air is blown from each of the passages toward the wind guide passage. ..

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