JP6509432B2 - Recessed ceiling air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner having a housing provided with a top plate and a plurality of side plates.

  Patent Document 1 describes a casing of an air conditioner in which a first side plate having an L-shaped bent portion at one end and a second side plate attached to the bent portion are combined. In the casing of this air conditioner, the tip of the second side plate is attached in contact with the outside of the bent portion at a position shifted from the corner of the first side plate. The 1st outside heat insulation material is stuck on the outer side of the 1st side board except the contact part with the 2nd side board. The 2nd outside heat insulation material is stuck on the outer side of the 2nd side board to the tip part of the 2nd side board. At the contact portion of the first side plate with the second side plate, a step corresponding to the plate thickness of the second side plate is formed. Thereby, a level | step difference is not produced in the joint of a 1st outer side heat insulating material and a 2nd outer side heat insulating material.

Japanese Patent Application Laid-Open No. 11-148671

  Generally, the housing of the ceiling-embedded air conditioner includes a top plate and a plurality of side plates. The top plate has a top surface portion and a peripheral wall formed on the periphery of the top surface portion by drawing. The plurality of side plates are combined with one another to form a polygonal cylinder. A part of the peripheral wall of the top plate is fitted to the inner peripheral side of the polygonal cylinder.

  In the configuration described in Patent Document 1, a convex step is formed on the inner circumferential side of the overlapping portion in which the side plates are overlapped. For this reason, when the peripheral wall of the top plate is fitted to the inner peripheral side of the polygonal cylinder, the overlapping portion is pushed out to the outer peripheral side by the peripheral wall. Therefore, there has been a problem that the second side plate and the first side plate expand outward in the overlapping portion.

  The present invention has been made to solve the above-described problems, and is a ceiling-embedded air conditioner that can prevent the side plates from expanding toward the outer peripheral side in the overlapping portion in which the side plates of the casing are overlapped. Intended to be provided.

  A ceiling-embedded air conditioner according to the present invention comprises a housing having a top plate and a plurality of side plates, and a fan and a heat exchanger housed in the housing, wherein the housing includes An overlapping portion in which ends of two side plates adjacent to each other among the plurality of side plates are overlapped is formed, and one of the two side plates is an end of the one side plate in the overlapping portion. A step-bent portion is formed so as to be offset on the inner peripheral side of the casing by the plate thickness dimension of the other side plate of the two side plates, and the top plate is provided with a top surface portion And a peripheral wall formed on the periphery of the top surface portion and fitted on the inner peripheral side of the plurality of side plates, and positioned on the inner peripheral side of the overlapping portion and the step bending portion in the peripheral wall. The part is formed with a recessed part which is recessed on the inner peripheral side of the housing.

  According to the present invention, the peripheral wall is formed with a recess corresponding to the position of the overlapping portion and the step bending portion. For this reason, when the peripheral wall is fitted to the inner peripheral side of the side plate, the convex portion formed on the inner peripheral side of the side plate in the overlapping portion and the step bending portion can be accommodated in the recess. Therefore, the side plates can be prevented from expanding to the outer peripheral side in the overlapping portion in which the side plates of the housing are overlapped.

BRIEF DESCRIPTION OF THE DRAWINGS It is a bottom view which shows the structure of the ceiling-embedded air conditioner 1 which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure of the housing | casing 20 when the A section of FIG. 1 is seen from the outer side. It is a perspective view which shows the structure of the housing | casing 20 in which the stepwise bending part 33 is not provided as a comparative example of Embodiment 1 of this invention. It is a perspective view which shows the structure of the housing | casing 20 when the A section of FIG. 1 is seen from inner side. In ceiling-embedded air conditioner 1 which concerns on Embodiment 1 of this invention, it is sectional drawing which shows the shape of the side plates 30 and 40 and the peripheral wall 52, and each positional relationship.

Embodiment 1
A ceiling-embedded air conditioner according to Embodiment 1 of the present invention will be described. In the present embodiment, a four-direction blowout ceiling cassette type indoor unit is illustrated as an example of the ceiling embedded air conditioner. FIG. 1 is a bottom view showing a configuration of a ceiling-embedded air conditioner 1 according to the present embodiment. As shown in FIG. 1, the ceiling-embedded air conditioner 1 includes a turbo fan 10, a fan motor 11 for driving the turbo fan 10, a heat exchanger 12 disposed on the leeward side of the turbo fan 10, and a turbo And a housing 20 for housing the fan 10, the fan motor 11, and the heat exchanger 12.

  The housing 20 includes a plurality of side plates disposed on the side surface of the ceiling-embedded air conditioner 1 and a top plate disposed on the top surface of the ceiling-embedded air conditioner 1. As described later with reference to FIGS. 2, 4 and 5, the case 20 of the present example includes two side plates 30 and 40 and one top plate 50. The two side plates 30, 40 each have a cross-sectional shape such as an L-shape, a J-shape, or a U-shape. The two side plates 30, 40 constitute a polygonal cylinder by being combined with each other. The top plate 50 is attached to the opening at the upper end of the polygonal cylinder. The side plates 30, 40 and the top plate 50 are all formed of sheet metal.

  Returning to FIG. 1, the turbo fan 10 and the fan motor 11 are attached to the top plate 50 of the housing 20. The heat exchanger 12 has a rectangular shape in plan view so as to surround the turbo fan 10. The heat exchanger 12 constitutes a refrigeration cycle together with a compressor, an outdoor heat exchanger and an expansion valve (not shown). For example, the compressor and the outdoor heat exchanger are accommodated in an outdoor unit (not shown), and the expansion valve is accommodated in the housing 20. In the heat exchanger 12, heat exchange between the refrigerant flowing inside and the air supplied by the turbo fan 10 is performed.

  Further, the ceiling-embedded air conditioner 1 is provided with a drain pump 13, a drain outlet 14, a refrigerant pipe 15, and an electrical component box 16 in which electrical components for operation control are accommodated. Below the turbo fan 10 in the bottom of the ceiling-embedded air conditioner 1, a suction port for sucking indoor air is formed. On the outer peripheral side of the bottom of the ceiling-embedded air conditioner 1 with respect to the heat exchanger 12, four outlets for blowing the air sucked from the suction port and passed through the heat exchanger 12 into the room are formed. There is.

  FIG. 2 is a perspective view showing the configuration of the housing 20 when the portion A of FIG. 1 is viewed from the outside. The vertical direction of FIG. 2 and FIGS. 3 and 4 described later is opposite to the vertical direction of the ceiling-embedded air conditioner 1 after it is actually attached. As shown in FIG. 2, the casing 20 is formed with an overlapping portion 21 in which the end portions 31 and 41 of two side plates 30 and 40 adjacent to each other among a plurality of side plates are overlapped. In the portion adjacent to the overlapping portion 21 of the side plate 30, the step bending (Z bending) is performed such that the end 31 of the side plate 30 in the overlapping portion 21 is displaced to the inner peripheral side of the housing 20 by the thickness of the side plate 40. A stepped bending portion 33 is formed. In the overlapping portion 21, the outer surface of the end 31 of the side plate 30 and the inner surface of the end 41 of the side plate 40 are in contact with each other. The end 31 of the side plate 30 and the end 41 of the side plate 40 may be fastened to each other using a fastening member such as a screw.

  The side plates 30 and 40 have a plurality of corner portions bent in accordance with the outer peripheral shape of the housing 20. In FIG. 2, only one corner portion 22 formed in the side plate 40 is shown. The overlapping portion 21 is provided on a flat portion shifted from the corner portion 22.

  Cutout holes 32 and 42 are provided in the side plates 30 and 40, respectively. The cut-out holes 32, 42 are cut out as needed to be through holes, for connection of ducts, attachment of optional parts, and the like. The cut-out hole 32 is provided in a portion of the side plate 30 other than the portion to be the overlapping portion 21. The cutout hole portion 42 is provided in a portion of the side plate 40 other than the portion to be the overlapping portion 21.

  FIG. 3 is a perspective view showing a configuration of a housing 20 in which the step bending portion 33 is not provided as a comparative example of the present embodiment. In the configuration of the housing 20 shown in FIG. 3, the tip end surface 31 a of the end portion 31 of the side plate 30 is disposed at the corner portion 22 of the housing 20. In the case of such a configuration, at the time of manufacture or installation of the ceiling-embedded air conditioner 1, there has been a case where the operator's hand is caught on the tip surface 31 a.

  On the other hand, in the configuration of the present embodiment, the step bending portion 33 is provided, and the overlapping portion 21 is provided in a plane portion shifted from the corner portion 22. Therefore, at the time of manufacture or installation of the ceiling-embedded air conditioner 1, it is possible to prevent the hand of the worker from being caught on the tip surface of the side plate 30.

  FIG. 4 is a perspective view showing the configuration of the housing 20 when the portion A of FIG. 1 is viewed from the inside. As shown in FIG. 4, the top plate 50 has a flat top surface 51 disposed on the top surface of the housing 20 and a peripheral wall 52 formed on the periphery of the top surface 51. The peripheral wall 52 is formed by drawing and has a wall-like shape that is vertically raised with respect to the top surface 51. At least a portion of the peripheral wall 52 is fitted to the inner peripheral side of the side plates 30 and 40. The peripheral wall 52 is fastened to at least one of the side plate 30 and the side plate 40 using a fastening member such as a screw 23 or the like. In this example, the peripheral wall 52 and the side plate 40 are fastened by one screw.

  FIG. 5 is a cross-sectional view showing the shapes of the side plates 30, 40 and the peripheral wall 52 and their positional relationship. In FIG. 5, the cross section which cut | disconnected the housing | casing 20 in the plane parallel to the top | upper surface part 51 of the top plate 50 is shown. As shown in FIG. 5, since the side plate 30 is bent stepwise at the step bending portion 33, in the overlapping portion 21 and the step bending portion 33, the side plate 30 is made on the inner peripheral side by the plate thickness dimension t of the side plate 40. It protrudes. That is, in the side plates 30 and 40, in the overlapping portion 21 and the step bending portion 33, convex portions that protrude to the inner peripheral side by the plate thickness dimension t are formed. On the other hand, in the portion of the peripheral wall 52 located on the inner peripheral side of the overlapping portion 21 and the step bending portion 33, the inner wall of the housing 20 is recessed with a depth X2 of, for example, the thickness t of the side plate 40 or more. A recess 53 is formed. The recess 53 has a flat bottom surface 53 a parallel to the end 31. The convex part (for example, the edge part 31) currently formed in the side plates 30 and 40 is accommodated in the recessed part 53. As shown in FIG.

  In this example, the step bending height dimension X1 of the step bending portion 33 is substantially the same as the plate thickness dimension t of the side plate 40 (X1 = t). When the thickness of the side plate 30 is the same as the thickness t of the side plate 40, the step bending height dimension X1 is substantially the same as the thickness of the side plate 30. The depth dimension X2 of the recess 53 is equal to or larger than the plate thickness dimension t (X2 t t). When the depth dimension X2 is the same as the plate thickness dimension t, the bottom surface 53a of the recess 53 (that is, the outer surface of the peripheral wall 52 located on the inner circumferential side of the overlapping portion 21 and the step bending portion 33) is It abuts on the inner surface 31 b of the end 31 of the side plate 30. When the depth dimension X2 is larger than the plate thickness dimension t, the bottom surface 53a faces the inner surface 31b via a gap.

  In this example, since the step bending height dimension X1 of the step bending portion 33 and the plate thickness dimension t of the side plate 40 are substantially the same, the outer surface 30a of the side plate 30 and the outer surface 41a of the end portion 41 of the side plate 40 And are arranged on the same plane. That is, no step is formed in the joint on the outer peripheral side of the side plate 30 and the side plate 40. A heat insulating material 60 is attached to the outer peripheral side of the side plate 30 and the side plate 40. The heat insulating material 60 is provided so as to be flat and flat across at least the outer peripheral side of the side plate 30 (for example, the outer surface 30a) and the outer peripheral side of the side plate 40 (for example, the outer surface 41a) ing.

  As described above, the ceiling-embedded air conditioner 1 according to the present embodiment includes the casing 20 having the top plate 50 and the plurality of side plates 30 and 40, and the turbo fan 10 housed in the casing 20. And a heat exchanger 12. The housing 20 is formed with an overlapping portion 21 in which the end portions 31 and 41 of two side plates 30 and 40 adjacent to each other among the plurality of side plates 30 and 40 are overlapped. In one side plate 30 of the two side plates 30, 40, the end portion 31 of the one side plate 30 in the overlapping portion 21 is a housing of the side plate 30 of the two side plates 30, 40 by the thickness dimension t of the other side plate 40. A step bent portion 33 is formed so as to be shifted to the inner peripheral side of the body 20. The top plate 50 has a top surface 51, and a peripheral wall 52 formed on the periphery of the top surface 51 and fitted on the inner peripheral side of the plurality of side plates 30, 40. In a portion of the peripheral wall 52 located on the inner peripheral side of the overlapping portion 21 and the step bending portion 33, a recessed portion 53 recessed on the inner peripheral side of the housing 20 is formed.

  According to this configuration, the recessed portion 53 is formed on the peripheral wall 52 of the top plate 50 in correspondence with the positions of the overlapping portion 21 and the step bending portion 33. Therefore, when the peripheral wall 52 is fitted on the inner peripheral side of the side plates 30, 40, the convex portion formed on the inner peripheral side of the side plates 30, 40 in the overlapping portion 21 and the step bending portion 33 Can be housed in Therefore, it is possible to prevent the side plates 30, 40 from expanding outward in the overlapping portion 21. As a result, the dimensional accuracy after assembly of the ceiling-embedded air conditioner 1 can be enhanced, so that the problem that the position of the clasp attached to the side plate can not be determined can be avoided.

  Moreover, in the ceiling-embedded air conditioner 1 according to the present embodiment, the depth dimension X2 of the recess 53 may be equal to or greater than the thickness dimension t of the other side plate 40. According to this configuration, it is possible to more reliably prevent the side plates 30 and 40 from expanding outward in the overlapping portion 21.

  Moreover, in the ceiling-embedded air conditioner 1 according to the present embodiment, the outer surface 30a of one side plate 30 and the outer surface 41a of the other side plate 40 may be disposed on the same plane. According to this configuration, when the ceiling-embedded air conditioner 1 is manufactured or installed, the operator's hand can be prevented from being caught on the end face of the side plate 30 or the side plate 40.

  Moreover, the ceiling-embedded air conditioner 1 according to the present embodiment may further include a heat insulating material 60 provided on the outer peripheral side of the plurality of side plates 30, 40. The heat insulating material 60 may be provided so as to be flat across the outer peripheral side of at least one side plate 30 and the outer peripheral side of the other side plate 40.

  DESCRIPTION OF SYMBOLS 1 Ceiling-embedded air conditioner, 10 turbo fan, 11 fan motor, 12 heat exchanger, 13 drain pump, 14 drain drainage port, 15 refrigerant piping, 16 electric component box, 20 housings, 21 overlapping parts, 22 corners Portions, 23 screws, 30, 40 side plates, 30a, 41a outer surface, 31, 41 end portions, 31a tip surface, 31b inner surface, 32, 42 cut-out hole portion, 33-step bent portion, 50 top plate, 51 top surface portion , 52 peripheral wall, 53 recess, 53a bottom surface, 60 heat insulator, t plate thickness dimension, X1 step bending height dimension, X2 depth dimension.

Claims (4)

A case having a top plate and a plurality of side plates;
A fan and a heat exchanger housed in the housing;
The casing is formed with an overlapping portion in which end portions of two side plates adjacent to each other among the plurality of side plates are overlapped,
In one side plate of the two side plates, the end of the one side plate in the overlapping portion is shifted to the inner peripheral side of the housing by the thickness dimension of the other side plate of the two side plates. And a step-bent portion that is bent in a step-like manner is formed.
The top plate has a top surface portion, and a peripheral wall formed on the periphery of the top surface portion and fitted on the inner peripheral side of the plurality of side plates,
The ceiling-embedded air conditioner according to claim 1, wherein a recessed portion recessed on the inner peripheral side of the casing is formed in a portion of the peripheral wall located on the inner peripheral side of the overlapping portion and the step bending portion.   The ceiling-embedded air conditioner according to claim 1, wherein a depth dimension of the recess is equal to or greater than a thickness dimension of the other side plate.   The ceiling-embedded air conditioner according to claim 1, wherein the outer surface of the one side plate and the outer surface of the other side plate are disposed on the same plane. It further comprises a heat insulating material provided on the outer peripheral side of the plurality of side plates,
The heat insulation material is provided so that it may become a flat shape straddling over the outer peripheral side of the at least said one side plate, and the outer peripheral side of said other side plate. Ceiling-embedded air conditioner as described.

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