JP6573068B2 - Embedded ceiling air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner, and more particularly to a mounting structure for attaching an electric signal line to a decorative panel.

  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. Usually, an air inlet is formed at the center of the decorative panel, 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). ).

  A suction grille is detachably attached to the air suction port of the decorative panel, and the bottom portion of the casing body is exposed by removing the suction grille during cleaning or maintenance. A movable wind direction plate that is driven by a stepping motor and sends conditioned air blown from the air blower outlet to a predetermined position in the room is attached to each air blower outlet of the decorative panel. The stepping motor that drives the wind direction plate and the electric signal lines of the stepping motor are arranged on the back side of the decorative panel (the side facing the casing body side).

Japanese Patent No. 4052264 Japanese Patent Publication No. 2007-1000098

  By the way, at the time of maintenance of the stepping motor, it was necessary to remove the decorative panel from the casing body. Since the decorative panel is a large panel having a side of 80 cm or more and installed on the ceiling, it was difficult for one person to perform the attaching / detaching work.

  Then, the subject of this invention is providing the ceiling embedded type air conditioner which can perform the maintenance operation | work of a wind direction board, without removing a decorative panel from a casing main body.

In order to solve the above-described problems, the present invention provides a casing body including a blower fan, a heat exchanger that surrounds the blower fan, and an electrical component box embedded in the ceiling, and a ceiling body that is attached to the bottom surface of the casing body. In a ceiling-embedded air conditioner having a decorative panel covering
The decorative panel is formed of a rectangular frame-shaped outer frame, an inner frame arranged on the inner side of the outer frame, and a corner portion connecting the outer frame and the inner frame, and the space between the outer frame and the inner frame is guided. The opening formed between the corners adjacent to each other in the air guide passage serves as an air outlet, the opening of the inner frame serves as an air inlet, and the air inlet has a rectangular suction port. A grille is detachably attached, and the inner frame has a U-shaped cross-section with the bottom side open, an electric signal line is wired inside the inner frame, and the open surface of the inner frame is connected to the suction grille. It is characterized by being covered with a bezel that supports the outer periphery.

  As a more preferred aspect, a wind direction plate is provided at each of the air outlets, and a stepping motor for rotating the wind direction plate is disposed at each of the corners. A signal line is wired inside the inner frame.

  As a more preferable aspect, the frame portion on one side of the four sides of the inner frame has a bearing portion of the rotary shaft of the suction grille, and the electric signal line is wired to the other three side frame portions, It is pulled out from the wiring outlet provided in the frame portion and connected to the electrical component box.

  The motor cover covers the stepping motor, and the motor cover fixes the stepping motor to the corner and the electric signal line to the inner frame.

  According to the present invention, the electric signal line of the stepping motor of the wind direction plate is wired inside the inner frame whose bottom side is open, and the open surface is covered with the bezel, so that the wind direction can be removed without removing the decorative panel from the casing body. Board maintenance work can be performed.

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. The perspective view which looked at the decorative panel from the bottom side. The disassembled perspective view which expanded the corner part of the decorative panel of the state which removed the stepping motor. The front view of a makeup | decoration panel. The (a) front view and the (b) perspective view which show the state which looked at the bezel from the bottom face side. The partial cross section front view which shows the state which attached the bezel to the decorative panel.

  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 body 2 housed in a space formed between a ceiling slab (not shown) and a ceiling panel T. The decorative panel 3 attached to the bottom surface B1 of the casing body 2 is provided.

  The casing body 2 has a rectangular top plate 21 and four side plates 22 extending downward from each side of the top plate 21, and a bottom surface B1 (the bottom side in FIG. 1) is opened. It is a shape. A heat insulating material 23 made of foamed polystyrene 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.

  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. The drain pan 6 includes a drain pan main body 61 made of foamed polystyrene resin having a dew receiving portion 66, and an air outlet passage 64 that guides conditioned air that has passed through the heat exchanger 25 to the air outlet 32 of the decorative panel 3. On the surface of the dew receiving part 66 of the drain pan main body 61 (the surface facing the heat exchanger 25), a drain sheet 62 made of hard resin that also serves as a reinforcing material and has high waterproof properties 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. An electrical component box 28 is provided in a part of the bell mouth 27 on the air inlet 31 side. In the electrical component box 28, electrical components for controlling the ceiling-embedded air conditioner 1 are housed.

  3 to 5, the decorative panel 3 includes a rectangular frame-shaped outer frame 70, a frame-shaped inner frame 71 disposed inside the outer frame 70, and the outer frame 70 and the inner frame 71. It is formed with the corner | angular part 76 which connects the corner | angular. The opening between the outer frame 70 and the inner frame 71 becomes the air guide passage 34, and the opening formed between the adjacent corner portions 76 in the air guide passage 34 becomes the air outlet 32 that matches the air outlet passage 64. The opening of the inner frame 71 becomes the air suction port 31.

  The decorative panel 3 is suspended and fixed to the casing body 2 by fastening screw holes 361 provided in the corner portion 36 of the outer frame 70 with the suspension fitting 4 and screws. The corner portion 36 of the outer frame 70 is covered with the corner panel C.

  The decorative panel 3 includes a suction grill 5 that is detachably attached to the air inlet 31 of the decorative panel 3, four wind direction plates 33 that are pivotally supported by the air outlet 32 of the decorative panel 3, and four wind direction plates 33. A stepping motor 35 for driving the motor, four motor covers 38 for fixing the stepping motor 35 to the decorative panel 3, an auxiliary frame 37 made of styrene foam forming the inner peripheral side of the air outlet 32, and the suction grill 5; It comprises a bezel 72 that fixes the auxiliary frame 37 to the decorative panel 3.

  The stepping motor 35 is accommodated in the motor cover 38. The motor cover 38 locks the locking claw 382 with the locking portion 701 of the outer frame 70, and further screws the screw hole 381 (see FIG. 6) with the screwing portion 715 of the inner frame 71, thereby 3 corners 76 are attached. At that time, the electric signal line EL of the stepping motor 35 is drawn out to the inner frame 71 side from a notch groove 714 provided in a rib 716 erected between the corner portion 76 and the inner frame 71.

  At each air outlet 32, a wind direction plate 33 is rotatably arranged. Referring to FIG. 3, 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 the wind guide passage 34 is formed. Inclining portions 332 and 332 for covering are provided.

  A rotating shaft (not shown) is provided on the back surface of the wind direction plate 33. In this embodiment, the rotation shafts are provided on the same axis at the left and right ends of the linear portion 331 and at the three locations in the center.

  Two of the rotating shafts provided at the three positions (right and center rotating shafts) are locked to bearing portions 391 and 392 provided on the decorative panel 3 shown in FIG. The remaining one rotation shaft (left rotation shaft) is connected to a rotation drive shaft 351 of a stepping motor 35 described later.

  As shown in FIGS. 5 and 6, a stepping motor 35 that rotates each wind direction plate 33 is disposed at a corner portion 76 of the air guide passage 34. In this embodiment, the stepping motor 35 is provided adjacent to one short side of the air outlet 32, one for each wind direction plate 33.

  According to this, at the time of operation stop, each wind direction board 33 rotates so that it may become horizontal along the air blower outlet 32, and closes the air blower 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 air guide passages 34 are also closed together.

  Further, during operation, each wind direction plate 33 rotates according to the operation status, and the air outlet 32 appears on the bottom surface B <b> 2 of the decorative panel 3. Most of the air blown out from each air outlet 32 is guided along the surface of the wind direction plate 33 and blown out from the four sides toward the room at a predetermined blowing angle.

  A part of the air blown out from the air outlet 32 is guided along the inclined portion 332 and blown out from the corners 76 at the four corners of the decorative panel 3 into the room. In this manner, the ceiling-embedded air conditioner 1 in this embodiment is directed to the entire circumferential direction (eight directions) including the four corners 76 in addition to the four directions from each side of the decorative panel 3. The conditioned air blows out.

  With reference to FIGS. 6 and 7, the inner frame 71 includes four frame portions 71 a to 71 d arranged along the four sides so as to surround the outer periphery of the air suction port 31. Here, among the four frame portions 71 a to 71 d of the inner frame 71, the bearing portion 75 for locking the rotating shaft 53 of the suction grille 5 between the frame portion 71 c and the notch portion 726 of the bezel 72. Is provided. In this example, the bearing portions 75 are arranged at three equal intervals.

  The frame portions 71a, 71b, 71d of the inner frame 71 are side plates 712 facing the air suction port 31, side plates 711 facing the air guide passage 34, and upper ends of the side plates 711, 712 facing the casing body 2. It has a bottom plate 713 that connects them together, and is formed in a U-shaped cross-section (a bowl shape) that becomes an open surface 710 whose bottom surface (upper surface in FIG. 5) is open.

  In this example, the electronic signal lines EL are wired with four electric signal lines EL drawn from the stepping motors 35 arranged one by one at the four corners of the decorative panel 3.

  Of the frame portions 71a to 71d of the inner frame 71, locking hooks 73 for hooking the electric signal lines EL project from the side plates 711 and 712 on the inner peripheral surfaces of the frame portions 71a, 71b, and 71d. In this embodiment, the locking hook 73 is provided at five locations for each of the frame portions 71a, 71b, 71d.

  As shown in FIGS. 7 and 8, the bezel 72 is a square annular frame attached to cover the open surfaces 710 of the frame portions 71 a to 71 d of the inner frame 71, and is screwed to the inner frame 71. .

  The bezel 72 is bent at a right angle from the first guide plate 721 inserted into the inner frame 71 along the side plate 711 of the inner frame 71 and the upper end of the first guide plate 721 (the side facing the casing body 2). The second guide plate 722 parallel to the bottom plate 713 of the frame 71 is formed in an L-shaped cross section.

  The other end of the first guide plate 721 is bent at a substantially right angle from the other end of the first guide plate 721 so as to be substantially flush with the surface of the decorative panel 3 and constitutes a part of the surface of the decorative panel 3. A flange portion 723 is formed. At the other end of the second guide plate 722, an engagement plate 724 that engages with the outer peripheral surface of the other side plate 712 of the inner frame 71 (the surface facing the air suction port 31) is formed.

  According to this, as shown in FIG. 8, the inner frame 71 and the bezel 72 are positioned at the center position of the decorative panel 3 in a state where the electric signal line EL of the stepping motor 35 is accommodated in the inner frame 71. Screwed.

  In a frame portion (in this example, the frame portion 71b) corresponding to one side of the inner frame 70, a wiring outlet 78 is provided for drawing out the electric signal line EL routed in the inner frame 70 to the outside. The wiring outlet 78 is a notch provided adjacent to the electrical component box 28 (see FIG. 2), and the electrical signal line EL drawn from the wiring outlet 78 is connected to the electrical component box 28.

  The suction grill 5 is further provided with release buttons 54 opposed to the two corners of the suction grill, which are used when the suction grill 5 is removed. According to this, when the release button 54 is pressed, the latch (not shown) provided on the back side of the suction grill 5 is released, and the engagement of the inner frame 71 with the release button hole 77 is released.

  As described above, according to the present invention, the electric signal line EL of the stepping motor 35 of the wind direction plate 33 is wired inside the inner frame 71 whose bottom surface of the decorative panel 3 is opened, and the open surface 710 is connected to the bezel 72. By covering with, the maintenance work of the wind direction plate 33 can be performed without removing the decorative panel 3 from the casing body 2.

1 ceiling embedded air conditioner 2 casing body 28 electric component box 3 face panel 31 air inlet 32 air outlet 33 air direction plate 34 the wind guide passage 35 stepping motor 36 corner portion 38 Mo hawk bars 4 suspended fitting 5 suction grille 6 Drain pan 70 Outer frame 71 Inner frame 710 Open surface 711, 712 Side plate 713 Bottom plate 714 Notch groove 72 Bezel 721 First guide plate 722 Second guide plate 76 Corner EL Electric signal line

Claims (4)

A ceiling-embedded air having a casing body that is embedded in the ceiling and includes a blower fan, a heat exchanger that surrounds the blower fan, and an electrical component box, and a decorative panel that is attached to the bottom surface of the casing body and covers the ceiling In the harmony machine,
The decorative panel is formed of a rectangular frame-shaped outer frame, an inner frame arranged on the inner side of the outer frame, and a corner portion connecting the outer frame and the inner frame, and the space between the outer frame and the inner frame is guided. It becomes a wind passage, an opening formed between the corners adjacent in the air guide passage becomes an air outlet, and an opening of the inner frame becomes an air inlet.
A rectangular suction grille is detachably attached to the air suction port, the inner frame is U-shaped in cross section with the bottom side open, and an electric signal line is wired inside the inner frame, The open surface of the inner frame is covered with a bezel that supports the outer periphery of the suction grill.   Each of the air outlets is provided with a wind direction plate, and a stepping motor for rotating the wind direction plate is disposed at each corner, and an electric signal line of the stepping motor is connected to the inside. The ceiling-embedded air conditioner according to claim 1, wherein the ceiling-embedded air conditioner is wired inside the frame.   The frame portion on one side of the four sides of the inner frame has a bearing portion for the rotary shaft of the suction grille, and the electric signal line is wired to the other three frame portions and provided in the frame portion. The ceiling-embedded air conditioner according to claim 1, wherein the ceiling-embedded air conditioner is drawn from a wiring outlet and connected to the electrical component box. It said a motor cover that covers the stepping motor, the motor Taka bar in the corner, a ceiling embedded air conditioner according to claim 2 in which the electrical signal line, characterized in that fixed to the frame.

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