JP6319064B2 - Embedded ceiling air conditioner - Google Patents

Description

  The present invention relates to a drain pan mounting structure for a ceiling-embedded air conditioner.

  The ceiling-embedded air conditioner includes a box-shaped main body unit embedded in the ceiling of the air conditioning room and a decorative panel that is attached to the lower surface of the main body unit and covers the ceiling. The main unit has a blower fan and a heat exchanger that surrounds the blower fan in the center of the inside, a bell mouth that takes air from the suction port and guides it to the blower fan at the bottom of the blower fan, the outside of the bell mouth, A drain pan covering the lower surface is arranged. The drain pan is a heat insulating member made of styrene foam that receives drain water generated in the heat exchanger, and has a blow-out port that blows out the air heat-exchanged with the refrigerant in the heat exchanger at the center of the drain pan.

  The drain pan is provided with metal fixing brackets attached to the bottom corners by foam integrated molding, and the drain pan is fixed to the main unit by fixing the fixing brackets with the main unit with screws. (See Patent Document 1)

International Publication No. WO2007 / 126072

  However, the need for a metal fixing bracket increases the number of parts, and also requires a step of integrally molding the fixing bracket and the heat insulating member. Further, when the drain water and the metal fixing bracket are close to each other, the fixing bracket is cooled by the drain water and the fixing bracket is condensed. Therefore, in order to prevent the dew condensation that occurs in the fixture, the heat insulating member needs to have a thickness that can provide a sufficient heat insulating effect. Therefore, the drain pan itself becomes thick. In addition, when the thickness cannot be increased, problems such as a decrease in the capacity of the dew receiving portion for storing drain water occur due to expansion to the heat exchanger side.

  The present invention solves the above-mentioned problems, and when fixing the drain pan to the main body unit, it has a structure that does not require a metal fixing bracket embedded in a heat insulating member made of polystyrene foam, thereby reducing the number of parts and the work process. An object of the present invention is to provide a ceiling-embedded air conditioner that can reduce and secure the capacity of a dew receiving portion that stores drain water without increasing the drain pan thickness.

  In order to solve the above-described problems, the present invention is a resin product provided with a blower fan arranged in the center of the inside, a heat exchanger surrounding the blower fan, and a dew receiving part for storing drain water generated in the heat exchanger. In the ceiling-embedded air conditioner having a main body unit provided with a drain pan comprising a drain sheet and a heat insulating member provided on the lower surface of the drain sheet, the outer shell of the main body unit includes a top plate and a top plate made of sheet metal A mounting plate is fixed to the side plate, and the mounting bracket includes a fixing portion that extends to the outside of the main unit at a position aligned with the lower end of the side plate. The drain sheet includes a flange that abuts against the inner peripheral surface of the side plate, and the flange is provided with a drain pan support portion that extends downward in accordance with the height of the heat insulating member, and is provided below the drain pan support portion. , Said bent towards the outside of the main unit, the contact bottom surface of the fixed part and those of the mounting bracket, and providing a drain pan fixing piece which is fixed by the fixing portion and screw.

  Further, the top plate includes a chamfered corner portion of a quadrangle, and the mounting bracket is fixed to each of the four side plate corner portions of the side plate extending from the chamfered corner portion.

  The ceiling-embedded air conditioner of the present invention configured as described above eliminates the need for a metal fixing bracket embedded in the heat insulating member, and can reduce the number of parts and work processes. Moreover, it becomes possible to ensure the capacity | capacitance of the dew receiving part which stores drain water, without making a drain pan thick.

1 is an external view of a ceiling-embedded air conditioner according to the present invention. It is sectional drawing of the ceiling-embedded air conditioner by this invention. It is the perspective view which decomposed | disassembled the main body unit and the decorative panel. It is an exploded view of a drain pan. It is explanatory drawing of a hook, (a) is a front view, (b) is a side view. It is a perspective view which shows the state which suspended the decorative panel in the drain pan. It is the figure which made the cross section the center of the arm part of a hook, (a) is sectional drawing which shows the main body unit at the time of shipment, (b) is sectional drawing which shows the state which temporarily fixed the decorative panel to the hook, (c) FIG. 5 is a cross-sectional view showing a state in which the decorative panel is fixed to the main unit. It is a fragmentary perspective view of a drain sheet. It is a perspective view which shows the fixing procedure of a drain pan.

  DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention will be described in detail as examples based on the accompanying drawings, but the present invention is not limited to these.

  A ceiling-embedded air conditioner 1 (hereinafter referred to as an air conditioner 1) according to the present invention shown in FIGS. 1 and 2 includes a box-shaped main unit 10 embedded in a ceiling T of an air-conditioned room K, and the main unit. 10 and a square-shaped decorative panel 3 attached to the lower surface 101.

  The outer shell of the main unit 10 is formed of a top plate 13 made of a sheet metal made of a square or a substantially octagonal chamfered corner 13a, and a side plate 11 extending downward from the outer periphery of the top plate 13. The In the side plate 11, the mounting bracket 12 is fixed to each of the four side plate corner portions 11 a of the side plate 11 extending from the chamfered corner portion 13 a of the top plate 13. The mounting bracket 12 includes a suspended portion 121 extending to the outside of the main unit 10 at the upper end, and a fixing portion 122 (see FIG. 3) at a position aligned with the lower end of the side plate 11 at the lower end. The main unit 10 is installed on the ceiling T by suspending the suspended portion 121 with a plurality of suspension bolts embedded in a ceiling wall surface (not shown). The fixing portion 122 is provided with screw holes 122a and 122b, respectively. The screw hole 122a is on the outside as viewed from the main unit 10, and the screw hole 122b is provided closer to the main unit 10 side.

  Further, the mounting bracket 12 is not necessarily provided at the side plate corner portion 11a, and may be provided at four locations on the side plate 11 that are symmetric with respect to the center of the main unit 10.

  In the main unit 10 in FIG. 2, the following description will be made with the top plate 13 direction as the upper surface or upper direction and the air-conditioned room K direction as the lower surface or lower direction. The same applies to each part.

  The decorative panel 3 has a quadrangular frame shape, and has an opening for the suction port 16 in the center, and a plurality of dot-shaped suction holes 401 are formed into a square shape as a whole in order to take air into the main body unit 10 in the opening. The suction grille 4 arranged in the detachable attachment is attached. Further, a blower outlet 31 is provided around the suction inlet 16 so as to match a main body blower outlet 15 which will be described later, and the blower outlet 31 is provided with a rotatable wind direction plate 5. At the four corners of the decorative panel 3, a human detection sensor 26, a display LED 27, and the like are provided.

  As shown in FIG. 3, the decorative panel 3 includes a locking claw 37 on the side wall 38 facing the opening for the suction port 16, and the locking claw 37 is locked to a hook 72 of a temporary fixing portion 70 of the main body unit 10 to be described later. And temporarily fixed to the main unit 10. While temporarily fixed, the wiring of the human detection sensor 26 and the display LED 27 and the wiring of the motor (not shown) that drives the wind direction plate 5 are connected to the electrical component box 18 described later. After the connection is completed, the decorative panel 3 is fixed to the screw hole 122a of the fixing portion 122 at the lower end of the mounting bracket 12 of the main body unit 10 using the screws 81, so that the lower surface of the main body unit 10 is attached to the main body unit 10. 101 and the ceiling surface T1 on the K side in the air-conditioning room around the lower surface 101 are covered.

  Referring again to FIG. 2, a heat insulating member 14 made of polystyrene foam is provided on the inner peripheral surface of the top plate 13 and the side plate 11 of the main unit 10. A fan motor 21 is fixed inside the top plate 13 by screws, and a hub 23a of the blower fan 23 is pivotally supported on a shaft 22 extending downward from the fan motor 21. The blower fan 23 is a so-called turbo fan including a hub 23a, a shroud 23b, and a plurality of blades 23c. The blower fan 23 is disposed in the center of the main unit 10 together with the fan motor 21.

  A trumpet-shaped bell mouth 24 is provided at the lower portion of the blower fan 23 so as to connect the suction port 16 and the blower fan 23 (form a ventilation path). The bell mouth 24 is made of resin and is positioned at the lower end of the suction guide portion 241 and the suction guide portion 241 that gradually spreads in a trumpet shape from the blower fan 23. A suction inlet frame 242 covering 401 is provided. An electrical component box 18 formed in an L shape is arranged in the suction inlet frame 242.

  The air in the air-conditioned room K is sucked into the suction port 16 from the suction hole 401 of the suction grill 4 by the blower fan 23 that is rotationally driven by the fan motor 21. The air sucked into the main unit 10 is guided to the blower fan 23 along the suction guide portion 241 of the bell mouth 24 and blown out toward the outside of the blower fan 23.

  The main unit 10 includes a drain pan 60 that fixes the suction port frame 24 of the bell mouth 24 and closes the lower surface 101 of the main unit 10.

  Around the blower fan 23, a heat exchanger 25 supported by a heat exchanger holder (not shown) sandwiched between the heat insulating member 14 and the drain pan 60 and fixed to the top plate 13 is disposed. The heat exchanger 25 is a fin-tube type heat exchanger composed of a plurality of rectangular aluminum fins 251 stacked at a predetermined interval and a plurality of heat transfer tubes 252 arranged orthogonal to the aluminum fins 251. 25. The heat exchanger 25 is provided so as to surround the blower fan 23 along the four sides of the main unit 10.

  At one corner of the heat exchanger 25, the heat transfer tube 252 is drawn out between the end portions of the heat exchanger 25. Although not shown, one corner of the main body unit 10 prevents the connecting portion 28 for connecting the drawn heat transfer tube 252 with a pipe for connecting to an outdoor outdoor unit from protruding from the main body unit 10 as shown in FIG. It is provided with a recessed part.

  The heat exchanger 25 is connected to a reversible refrigerant circuit that can perform a cooling operation and a heating operation (not shown). The heat exchanger 25 functions as an evaporator and cools the air guided from the blower fan 23 during the cooling operation. During operation, it functions as a condenser and heats.

  The four main body outlets 15 between the heat exchanger 25 and the heat insulating member 14 around the side plate 11 and along each of the four sides of the main body unit 10 provided in the drain pan 60 make up the air blown from the blower fan 23. It becomes the ventilation path 17 guided to the blower outlet 31 of the panel 3. The air heat-exchanged with the refrigerant in the heat exchanger 25 passes through the air passage 17 and the main body outlet 15 and is blown out from the outlet 31 of the decorative panel 3 into the air-conditioned room K.

As shown in FIGS. 2 and 4, the drain pan 60 is integrally molded with the drain sheet 61 having a dew receiving portion 61 b that stores drain water generated in the heat exchanger 25 and the lower surface of the drain sheet 61. And a foam heat insulating member (hereinafter referred to as a heat insulating member) 62 made of polystyrene foam. The heat insulating member 62 is formed in conformity with the concave and convex shape of the drain sheet 61 and prevents dew condensation generated on the drain sheet 61. The lower surface of the heat insulating member 62 is formed to be a smooth surface. Further, a cable groove 63 is provided in a portion in contact with the side plate corner portion 11a.
Note that the drain sheet 61 and the heat insulating member 62 are not necessarily integrally molded, and may be combined separately.

  The drain sheet 61 and the heat insulating member 62 of the drain pan 60 each have an opening at the center for attaching the suction port frame 24 of the bell mouth 24, and a bell mouth mounting portion that forms a substantially rectangular recess around the suction port frame 24. 61a, 62a, and dew receiving parts 61b, 62b for storing drain water generated in the heat exchanger 25 around the bell mouth mounting parts 61a, 62a, and the main body outlet 15 (described above around the dew receiving parts 61b, 62b. 61c, 62c). The outer edge of the drain pan 60 is formed so as to be in contact with the side plate 11 without a gap so that the blown air does not escape from the gap.

  The drain sheet 61 is a molded product having a uniform thickness made of a resin having a thickness of about 2 mm. The drain sheet 61 forms the body unit 10 side of the bell mouth mounting portion 61a and the dew receiving portion 61b, and the body outlet 15 ( 61c) and a flange 611 that contacts the inner peripheral surface of the side plate 11 of the main unit 10 at the outer edge of the main body outlet 15 (61c).

  8 and 9, the flange 611 is provided with a drain pan support portion 74 that extends downward in accordance with the height L2 of the heat insulating member 62 at a position that does not overlap the cable groove 63 at a portion that contacts the side plate corner portion 11a. The drain pan support portion 74 includes a recess 741 in the vertical direction for reinforcement and a rib 742 connected to the flange 611 at the left and right ends, and the lower end of the drain pan support portion 74 is bent at a right angle toward the outside of the main unit 10. A drain pan fixing piece 75 that contacts the bottom surface of the fixing portion 122 of the mounting bracket 12 is provided.

  The drain pan fixing piece 75 has a screw hole 751, and the drain pan 60 is fixed to the main body unit 10 by fixing the screw hole 751 and the screw hole 122 b of the fixing portion 122 of the mounting bracket 12. The drain pan 60 supports the electrical component box 18, the resin bell mouth 24, the drain sheet 61, and the foamed heat insulating member 62, and there are no heavy parts, and four locations along the side plate corner 11 a. The lower part of the main unit 10 can be sufficiently supported by the drain pan support part 74 and the drain pan fixing piece 75 which are a part of the provided drain sheet 61.

  Therefore, unlike the conventional example, it is not necessary to attach a metal fixing bracket to the drain pan 60 by integral foaming, so that the number of parts and processes can be reduced, and the cost can be reduced. In addition, it is not necessary to form the heat insulating member 62 thick to prevent dew condensation on the fixing bracket, and the capacity of the dew receiving portion 61b for storing drain water without increasing the drain pan 60 can be secured.

  Further, the drain sheet 61 includes a plurality of screw hole bosses 612 that pass through the heat insulating member 62 from the bell mouth mounting portion 61 a and protrude to the bell mouth mounting portion 62 a of the heat insulating member 62. The bell mouth 24 is fixed to the boss 612 with a screw.

  Referring also to FIG. 6, the dew receiving part 61 b of the drain sheet 61 protrudes on the heat insulating member 62 side in a dish shape surrounding the bell mouth mounting part 61 a in order to receive the drain water generated in the heat exchanger 25. ing. A fixing piece 71 is provided on the side wall 613 of the dew receiving portion 61b. The fixed piece 71 is a plate-like protruding piece extending toward the heat insulating member 62, and has a bearing portion 711 that penetrates the heat insulating member 62 at the tip and protrudes from the heat insulating member 62. The two fixing pieces 71 are arranged side by side in the axial direction of the bearing portion 711 in order to receive two supporting shaft portions 723 of the hook 72 described later. Let L be the interval between the fixed pieces 71 arranged side by side.

  The heat insulating member 62 is provided with an inclined surface 624 at a corner (surface) where the fixing piece 71 protrudes on the side wall 623 between the dew receiving portion 62b and the bell mouth mounting portion 62a. A concave portion 73 having a width equal to the interval L is provided at a position corresponding to the fixed piece 71 of the inclined surface 624. The fixed piece 71 just appears on the vertical rising surface 731 of the recess 73. The two fixed pieces 71 face each other in the recess 73, and the opposite outer surface is buried in the heat insulating member 62.

  A hook 72 is locked to the bearing portion 711. As shown in FIG. 5, the hook 72 is formed by bending one steel wire, and a hanging portion 721 that is locked to the locking claw 37 of the decorative panel 3 and a right angle in the same direction from both ends of the hanging portion 721. A pair of arm portions 722 and 722 that are bent at right angles toward the fixed piece 71, and are bent at right angles in a direction parallel to the suspension portion 721 from the tip of each arm portion 722 and away from each other. And support shaft portions 723 and 723 that are supported by the bearing portion 711. The steel wire may be a spring steel wire having elasticity.

  Referring again to FIG. 6, the hook 72 is elastically deformed and inserted into the recess 73, and the support shaft portion 723 is pivotally supported in the central hole 711 a of the bearing portion 711. The distal end of the support shaft portion 723 penetrates into the heat insulating member 62 that is a polystyrene foam. As a result, the hook 72 is pivotally supported by the fixed piece 71 so as to be rotatable.

  The fixing piece 71, the concave portion 73 and the hook 72 are combined to form a temporary fixing portion 70. The temporary fixing part 70 is also provided on the opposite side wall 613. In order to temporarily fix the decorative panel 3 in a well-balanced manner, the two temporary fixing portions 70 are preferably provided at positions that are symmetrical with respect to the decorative panel 3.

  The locking claw 37 of the decorative panel 3 is provided to protrude from the side wall 38 of the opening for the suction port 16 toward the suction port 16, and is wider from the front end of the locking piece 371 and wider than the interval L. And a hooking portion 372 that protrudes from the top. Moreover, it has the groove part 373 provided on the locking piece 371 from the hook part 372. Two grooves 373 are provided in accordance with the interval L. The hook portion 372 includes a convex portion 374 projecting from the groove portion 373.

  As shown in FIG. 7A, when the air conditioner 1 is shipped, the hook 72 is folded so that the arm portion 722 is in contact with the bottom surface of the heat insulating member 62, so that the main unit 10 is enlarged by the hook 72. Absent. 7B, when the decorative panel 3 is fixed to the main unit 10 embedded in the ceiling T by starting the mounting operation, first, the decorative panel 3 with the suction grill 4 removed is locked. The arm portions 722 and 722 of the hook 72 are inserted into the groove portions 373 and 373 of the claw 37. The arm portions 722 and 722 are pressed by the convex portions 374 and are not detached from the groove portions 373 and 373. When the hooks 72 of the two temporary fixing portions 70 are inserted into the locking claws 37 and the hand to be operated is released, the hanging portion 721 of the hook 72 is pressed by the hooking portion 372 and the decorative panel 3 is suspended from the main unit 10. Temporarily fixed.

  When the temporarily fixed decorative panel 3 is pushed up to the main unit 10 side and the screw 81 of FIG. 3 is fixed to the screw hole 122a of the fixing portion 122 of the mounting bracket 12, the arm portion of the hook 72 as shown in FIG. 722 and 722 slide in the grooves 373 and 373 of the locking claw 37. The hanging portion 721 of the hook 72 moves downward from the locking claw 37, but does not come off the locking claw 37 because the arm portions 722 and 722 are pressed by the convex portion 374 of the hooking portion 372.

  When removing the decorative panel 3 from the main unit 10 for maintenance, first, the screw 81 is removed from the fixing portion 122 of the mounting bracket 12 so that the decorative panel 3 is suspended. At this time, the arm portions 722 and 722 move in the groove portion 373 and return to the state of FIG. Next, the decorative panel 3 is removed from the main unit 10 by removing the hook 72 from the locking claw 37.

  As described above, according to the present invention, the drain pan 60 is constituted by the resin drain sheet 61 and the heat insulating member 62 made of styrene foam provided on the lower surface of the drain sheet 61, and the heat insulating member is provided on the flange 611 of the drain sheet 61. The drain pan support portion 74 extending downward in accordance with the height L2 of 62, and the drain pan support piece 74 fixed to the lower end of the drain pan support portion 74 with the fixing portion 122 of the mounting bracket 12 and the screw are provided. Can be fixed to the main body unit 10 without the need for a metal fixing bracket embedded in the heat insulating member 61 made of polystyrene foam as in the conventional example, and the fixing bracket, the fixing bracket and the heat insulating member are integrally molded Reduce the cost by reducing the number of processes, and also ensure that the capacity of the dew section that stores drain water without thickening the drain pan is secured. Serving as a mold air conditioner.

1: ceiling-embedded air conditioner (air conditioner), 10: main unit, 16: suction port, 18: electrical component box 23: blower fan, 24: bell mouth, 25: heat exchanger 3: decorative panel, 37: Locking claw 60: Drain pan, 61: Drain sheet, 62: Thermal insulation member 70: Temporary fixing part, 71: Fixing piece, 711: Bearing part, 72: Hook, 73: Recessed part, 74: Drain pan support part, 741: Concave part, 742: rib, 75: drain pan fixing piece K: air-conditioned room, T1: ceiling surface

Claims (4)

A drain pan comprising a blower fan disposed in the center of the inside, a heat exchanger surrounding the blower fan, a resin drain sheet that receives drain water generated by the heat exchanger, and a heat insulating member provided on the lower surface of the drain sheet In a ceiling-embedded air conditioner having a main unit equipped with
The outer shell of the main unit is formed of a top plate made of sheet metal and a side plate extending downward from the outer periphery of the top plate, and a mounting bracket is fixed to the side plate, and the mounting bracket is aligned with the lower end of the side plate. A fixed portion extending outside the main body unit at the position,
The drain sheet includes a flange that abuts on the inner peripheral surface of the side plate, and the flange is provided with a drain pan support portion that extends downward according to the height of the heat insulating member, and at the lower end of the drain pan support portion, A ceiling-embedded air conditioner that is bent toward the outside of the main body unit, abuts against the bottom surface of the fixing portion of the mounting bracket, and is provided with a drain pan fixing piece fixed with the fixing portion and a screw.   2. The ceiling-embedded air conditioner according to claim 1, wherein the drain pan support portion includes a recessed portion in a vertical direction and ribs at left and right ends for reinforcement.   The said top plate chamfers the corner | angular part of a quadrangle | tetragon, and the said mounting bracket is each fixed to four side-plate corner | angular parts of the said side plate extended from the said chamfered corner | angular part. Ceiling-mounted air conditioner. 4. The ceiling-embedded air conditioner according to claim 3 , wherein the heat insulating member includes a cable groove at a position where the chamfered corner portion does not overlap the drain pan fixing piece.

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