JP6439936B2 - Duct type air conditioner - Google Patents

Description

  The present invention relates to a duct type air conditioner housed in a space formed between a ceiling slab and a ceiling panel. More specifically, the present invention relates to a structure of a bottom plate constituting a part of a casing.

  As one of the air conditioners, there is a duct type air conditioner (see, for example, Patent Document 1). As shown in FIG. 6, the duct type air conditioner 1 has an indoor unit 2 in which a heat exchanger 3 and a blower fan 4 are housed. The indoor unit 2 includes a ceiling slab S and a ceiling panel P. Are suspended and held in a space formed between the two.

  In installing the duct-type air conditioner 1, an air suction grille 5 and an air blowing grille 7 are provided at predetermined locations on the ceiling panel P, and an air suction port on the side of the blower fan 4 of the indoor unit 2 (in FIG. 6). An air suction grille 5 is connected to the right side) via a suction duct 6, and air is supplied to the air outlet on the heat exchanger 3 side (left side in FIG. 6) via a blower duct 8 and a blowout chamber device 9. A blowing grill 7 is connected.

  Along with the operation of the blower fan 4, room air is sucked from the air suction grille 5, led to the indoor unit 2 through the suction duct 6, heat exchanged with the refrigerant in the heat exchanger 3, and heat exchange. The conditioned air (cold air or warm air) is blown out from the air blowing grill 7 into the room through the blower duct 8 and the blowout chamber device 9.

  According to this duct type air conditioner 1, the ceiling panel P is provided only with the air suction grille 5 and the air blowout grille 7, and the ducts such as the indoor unit 2, the suction duct 6, and the air duct 7 are ceiling panel. Since it is hidden by P, the beauty of the ceiling surface can be improved.

  By the way, the inside of the casing of the indoor unit 2 is divided into a heat exchanger chamber 3A in which the heat exchanger 3 is accommodated by a partition plate 2A and a blower chamber 4A in which the blower fan 4 is accommodated. In order to perform maintenance of components, as shown in FIG. 7, bottom plates 3B and 4B made of sheet metal are detachably attached to the bottom surfaces of the heat exchanger chamber 3A and the blower chamber 4A.

  In the following description, the bottom plate 3B that covers the bottom surface on the heat exchanger chamber 3A side may be referred to as “heat exchanger chamber bottom plate”, and the bottom plate 4B that covers the bottom surface on the blower chamber 4A side may be referred to as “blower chamber bottom plate”. Further, in FIG. 7, a portion denoted by reference numeral 3 </ b> C is a drain pan of the heat exchanger 3.

  Although the bottom plates 3B and 4B are attached by screws, in this prior art, the heat exchanger chamber bottom plate 3B has a size such that one end of the bottom plate 3B protrudes toward the blower chamber 4A side. After placing on the bottom surface of the heat exchanger chamber 3A side and screwing to a flange plate (flange portion) 2B formed on the lower end side of the partition plate 2A, the blower chamber bottom plate 4B has one end at the heat exchanger chamber bottom plate 3B. The end of the blower chamber bottom plate 4B is screwed to the end of the heat exchanger chamber bottom plate 3B (the screw is not shown in the figure). ).

JP 2011-208847 A

  However, since the bottom plates 3B and 4B are screwed as described above, the following problems occur during maintenance.

  That is, only the blower chamber bottom plate 4B needs to be removed during maintenance of the components in the blower chamber 4A. However, when maintaining the components in the heat exchanger chamber 3A, the heat exchanger chamber bottom plate 3B is removed after removing the blower chamber bottom plate 4B. Must be removed.

  Further, at the end of the maintenance of the components in the heat exchanger chamber 3A, the fan chamber bottom plate 4B must be screwed after the heat exchanger chamber bottom plate 3B is screwed. Performing such work in a narrow space behind the ceiling places an extra burden on the operator. Further, the portion where the blower chamber bottom plate 4B overlaps the heat exchanger chamber bottom plate 3B is flat, but if it is flat, the sheet metal is easily deformed.

  Therefore, the object of the present invention is to prevent the deformation of the heat exchanger chamber bottom plate on the heat exchanger chamber side and the fan chamber bottom plate on the blower chamber side with respect to the casing of the indoor unit unit, and a duct type that can be attached and detached individually. It is to provide an air conditioner.

  In order to solve the above-described problems, the present invention includes a rectangular parallelepiped housing having an air outlet on the front surface and an air suction port on the rear surface, and the interior of the housing is an indoor heat exchanger by a partition plate. Is divided into a heat exchanger chamber on the side of the air outlet and a fan chamber on the side of the air suction port that stores the blower fan, and the housing forms a bottom surface of the heat exchanger chamber. In the duct-type air conditioner in which the heat exchanger chamber bottom plate and the blower chamber bottom plate forming the bottom surface of the blower chamber are detachably attached, the partition plate is disposed in the casing from the top surface to the heat. A partition plate body arranged over the exchanger chamber bottom plate, and a flange portion bent along the heat exchanger chamber bottom plate from one end of the partition plate body on the heat exchanger chamber bottom plate side, and the heat exchange Vessel room bottom plate and above blower room bottom Reinforcing pieces that are bent at right angles toward the top surface of the casing are provided on the sides facing each other, and the flange portion is a first portion to which the heat exchanger chamber bottom plate is screwed. A screw-fastening portion and a second screw-fastening portion to which the blower chamber bottom plate is screwed, and the reinforcing pieces are accommodated between the first screw-fastening portion and the second screw-fastening portion. It is characterized in that a recess is provided.

  As a more preferred aspect, the flange portion is formed so as to project toward the blower chamber side.

  According to the present invention, the heat exchanger chamber bottom plate and the blower chamber bottom plate are prevented from being deformed, and the heat exchanger chamber bottom plate and the blower chamber bottom plate can be individually attached to and detached from the bottom surface of the housing via the partition plate. Only the heat exchanger chamber bottom plate may be removed during maintenance of the components in the heat exchanger chamber, and only the blower chamber bottom plate may be removed during maintenance of the components in the blower chamber, thereby improving maintenance workability.

  In addition, since the flange portion of the partition plate is formed so as to protrude toward the blower chamber side, the heat exchanger chamber bottom plate and the heat exchanger chamber bottom plate are disposed together with the heat exchanger chamber bottom plate during maintenance of the components in the heat exchanger chamber. The drain pan arranged in can also be easily taken out.

The bottom side perspective view which shows the indoor unit with which the duct type air conditioner which concerns on one Embodiment of this invention is provided. The bottom side perspective view which shows the state which removed the components of the heat exchanger room bottom plate, the air blower room bottom plate, and the side plate from the said indoor unit. The bottom side perspective view which expanded a part of FIG. (A) Perspective view of heat exchanger chamber bottom plate, (b) Perspective view of blower chamber bottom plate. The partial expanded sectional view which shows the state which screwed the heat exchanger chamber bottom plate and the air blower chamber bottom plate to the partition plate. The schematic diagram explaining the structure of the conventional duct type air conditioner. The expanded sectional view which shows the attachment part of the baseplate in the said conventional duct type air conditioner.

  Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 5, but the present invention is not limited to this.

  As shown in FIG. 1, the indoor unit 1A of the duct type air conditioner includes a rectangular parallelepiped casing 10. The casing 10 includes a rectangular top plate 11, side plates 12 a and 12 b provided substantially at right angles to both sides of the top plate 11, and end portions of the side plates 12 a and 12 b opposite to the top plate 11. The heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 are provided, and the front side and the rear side are opened. In addition, the assembly of the housing | casing 10 makes the top plate 11 the bottom, assembles each component mentioned later, and finally assembles the heat exchanger chamber bottom plate 13 and the fan chamber bottom plate 14. When installing, the top plate 11 is turned upside down so that the top plate 11 faces up. Therefore, for convenience of explanation, the casing 10 is shown upside down in FIG. 1 (the same applies to FIGS. 2 and 3).

  Referring also to FIG. 2, the housing 10 is partitioned into a heat exchanger chamber HC that houses the heat exchanger 15 and a blower chamber FC that houses the blower fan 16 by the partition plate 20. An air outlet 17 for blowing out conditioned air is formed on the front surface 10a of the housing 10 on the heat exchanger chamber HC side, and room air is taken into the housing 10 on the rear surface 10b on the fan chamber FC side. An air inlet 18 is formed.

  As shown in FIG. 6, the casing 10 has a ceiling slab S and a ceiling panel P, with the top plate 11 as the upper side and the heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 as the lower side (bottom side). The air suction port 18 and the air suction grille 5 are connected via the intake duct 6, and the air blowout port 17 and the air blowout grille 7 are connected to the blower duct 8. And a blow-out chamber device 9. Although not shown, the indoor unit 1A is connected to the outdoor unit through a refrigerant pipe.

  An electrical component box 19 is provided on the side surface (right side surface in FIG. 1) of the blower chamber FC of the housing 10. The electrical component box 19 accommodates a power supply unit and a circuit board (both not shown) inside, and is sealed with a waterproof seal so that water does not enter inside. The electrical component box 19 is screwed to the top plate 11 together with the fixed frame 30.

  The top plate 11 is made of sheet metal and covers the top surface of the housing 10. On both sides of the top plate 11, there are two left and right suspension fittings 111 for hanging the indoor unit 1 </ b> A on a ceiling slab via suspension bolts (not shown). (4 places in total) are provided.

  The side plates 12 a and 12 b are made of sheet metal, cover the side surface of the housing 10, and are screwed to the side surfaces of the top plate 11 and the partition plate 20.

  The heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 are disposed on the bottom surface of the housing 10 and are removed during maintenance.

  In this embodiment, as shown in FIG. 4A, the heat exchanger chamber bottom plate 13 is made of a single rectangular metal plate and covers the casing 10 so as to cover the heat exchanger chamber HC side of the bottom surface 10a. Attached to. Reinforcing pieces 131 are formed on the four sides of the heat exchanger chamber bottom plate 13 so as to be bent substantially at right angles toward the inner side (the housing 10 side).

  A plurality of screw holes 132 for screwing are formed in the heat exchanger chamber bottom plate 13, and the heat exchanger chamber bottom plate 13 is heat exchanged by screwing the heat exchanger chamber bottom plate 13 to the housing 10. It becomes the bottom of the chamber HC. As shown in FIG. 5, the heat exchanger chamber bottom plate 13 includes a protruding end portion 13 a that protrudes toward the blower chamber FC side at one end thereof.

  The blower chamber bottom plate 14 is also made of one rectangular metal plate and is attached to the housing 10 so as to cover the blower chamber FC side of the bottom surface 10a. Reinforcing pieces 141 are formed on the sides in the longitudinal direction of the blower chamber bottom plate 14 so as to be bent substantially at right angles toward the inner side (the housing 10 side).

  The reinforcing pieces 131 and 141 are formed to increase the mechanical strength of the heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 made of sheet metal, and the deformation by the external force is prevented by providing the reinforcing pieces 131 and 141. be able to.

  A plurality of screw holes 142 for screwing are formed in the blower chamber bottom plate 14 including the reinforcing piece 141, and the blower chamber bottom plate 14 is screwed to a part of the casing 10, thereby providing a blower chamber. The bottom plate 14 forms the bottom surface of the blower chamber FC.

  As described above, the blower chamber bottom plate 14 is narrower than the length of the bottom surface of the blower chamber FC in the front-rear direction because the protruding end 13a on one end side of the heat exchanger chamber bottom plate 13 protrudes toward the blower chamber FC. Has been. That is, as shown in FIG. 5, the heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 do not have overlapping portions.

  In this embodiment, the heat exchanger 15 is a heat exchanger in which one end of two fin-shaped heat exchangers formed in a plate shape is butted against each other and connected in a “laterally V-shape”. It arrange | positions so that the side may face the air blower outlet 17 (refer FIG. 6).

  As shown in FIG. 2, the blower fan 16 includes a biaxial fan motor 161 having an output shaft 162 at both ends, and a sirocco fan 163 coaxially attached to the output shaft 162. In this embodiment, Four sirocco fans 163 are connected to one fan motor 161. The shape and number of sirocco fans 163 may be arbitrarily selected according to specifications.

  Referring also to FIG. 3, the partition plate 20 is screwed to substantially the center in the front-rear direction of the top plate 11, and the partition plate main body 21 disposed toward the bottom surfaces 10 a and 10 b of the housing 10, The lower end (upper end in FIG. 3) of the plate body 21 is formed from a flange portion (flange portion) 22 that is bent so as to be parallel to the bottom surface 10 a of the housing 10.

  Since the drain pan 40 is disposed on the heat exchanger chamber HC side so as to cover the entire bottom surface side (upper surface side in FIG. 2) of the heat exchanger 15, the partition plate 20 has the flange portion 22 with the blower chamber FC. It is preferably bent so as to project toward the side.

  In this embodiment, the partition plate 20 is formed in a length extending from one side surface of the top plate 11 to the other side surface. An end 211 on the top plate 11 side of the partition plate 20 is bent in a flange shape on the heat exchanger chamber HC side, and the end 211 and the top plate 11 are screwed (see FIG. 3).

  The partition plate main body 21 is provided with a communication hole (not shown) that communicates the heat exchanger chamber HC and the blower chamber FC, and each sirocco fan 163 so that the air outlet of the sirocco fan 163 matches the communication hole. 163 is screwed to the surface of the partition plate body 21 on the blower chamber FC side.

  3 and 5, the flange portion 22 includes a first screwing portion 23 to which the protruding end portion 13 a of the heat exchanger chamber bottom plate 13 is screwed, and an end portion 14 a (partition plate) of the blower chamber bottom plate 14. A second screwing portion 24 to which the end portion on the side closer to 20 is screwed, and the reinforcing pieces 131 and 141 are accommodated between the first screwing portion 23 and the second screwing portion 24. The recess 25 is provided.

  The first screwing portion 23 is provided with a plurality of screw holes 231 at predetermined intervals for screwing the protruding end portion 13 a of the heat exchanger chamber bottom plate 13. Similarly, the second screwing portion 24 is also provided with a plurality of screw holes 241 at predetermined intervals for screwing the end portion 14a of the blower chamber bottom plate 14.

  The recessed portion 25 is recessed between the first screwed portion 23 and the second screwed portion 24 so that the cross section in the left-right direction becomes U-shaped by pressing, for example, toward the top plate 11 side on the blower chamber FC side. It is formed by bending and extends along the longitudinal direction of the flange portion 22.

  When the heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 are placed on the screwing portions 23 and 24 and screwed with screws S1 and S2, the reinforcing pieces 131 and 141 arranged to face each other are both housed in the recess 25. As described above, the storage recess 25 is formed so that the depth D is deeper than the height H of the reinforcing pieces 131 and 141.

  In order to attach the panels 13 and 14 to the housing 10, the reinforcing plate 131 at the end of the heat exchanger chamber bottom plate 13 is inserted into the recess 25, and the protruding end portion 13 a of the heat exchanger chamber bottom plate 13 is connected to the housing 10. The heat exchanger chamber bottom plate 13 and the first screwing portion 23 are screwed with screws S1 so as to cover the heat exchanger chamber HC side of the bottom surface 10a.

  Similarly, the reinforcing plate 141 at the end of the blower chamber bottom plate 14 is inserted into the recess 25, and the blower chamber bottom plate 14 is put on the blower chamber FC side of the bottom surface 10 a of the housing 10 to end the end portion 14 a of the blower chamber bottom plate 14. And the second screwing portion 24 are screwed with the screw S2.

  In this manner, the heat exchanger chamber bottom plate 13 on the heat exchanger chamber HC side and the blower chamber bottom plate 14 on the blower chamber FC side can be individually screwed to the flange portion 22 of the partition plate 20, respectively. Since it can be removed individually, workability during maintenance is improved.

  In this embodiment, the recess 25 is formed in a U-shaped cross section, and the reinforcing pieces 131 and 141 are accommodated therein. However, the reinforcing pieces 131 and 141 do not interfere with the housing 10, and the heat exchanger The chamber bottom plate 13 and the blower chamber bottom plate 14 may be attached so as to be parallel along the bottom surface 10a of the casing 10, and the cross section of the recess 25 may be any shape such as a V shape or a trapezoidal shape. Further, instead of the recess 25, for example, a shape like a slit groove into which the reinforcing pieces 131 and 141 are inserted may be used.

DESCRIPTION OF SYMBOLS 1 Duct type air conditioner 1A Indoor unit 10 Case 11 Top plate 12a, 12b Side plate 13 Heat exchanger chamber bottom plate 131 Reinforcement piece 14 Blower chamber bottom plate 141 Reinforcement piece 15 Heat exchanger 16 Blower fan 17 Air outlet 18 Air Suction port 19 Electrical component box 20 Partition plate 21 Partition plate body 22 Flange portion 23 First screw fixing portion 24 Second screw fixing portion 25 Recessed portion 30 Fixed frame 40 Drain pan FC Blower chamber HC Heat exchanger chamber

Claims (2)

A heat exchanger on the air outlet side including a rectangular parallelepiped housing having an air outlet on the front surface and an air suction port on the rear surface, wherein the interior of the housing houses the indoor heat exchanger by a partition plate And a blower chamber on the air suction port side that houses the blower fan, and the housing includes a heat exchanger chamber bottom plate that forms a bottom surface of the heat exchanger chamber, and the blower chamber In the duct type air conditioner in which the blower chamber bottom plate that forms the bottom surface is detachably attached,
The partition plate is a partition plate body disposed from the top surface to the heat exchanger chamber bottom plate in the housing, and from one end of the partition plate body on the heat exchanger chamber bottom plate side to the heat exchanger chamber bottom plate. A flange portion bent along,
Reinforcing pieces bent at right angles toward the top surface side of the housing are provided on opposite sides of the heat exchanger chamber bottom plate and the blower chamber bottom plate,
The flange portion has a first screwing portion to which the heat exchanger chamber bottom plate is screwed, and a second screwing portion to which the blower chamber bottom plate is screwed, and the first screwing portion and the A duct-type air conditioner characterized in that a recess for storing each reinforcing piece is provided between the second screwing portions.   The duct-type air conditioner according to claim 1, wherein the flange portion is formed so as to project toward the blower chamber side.

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