Top plate, and indoor unit of air conditioner

Abstract

To provide a top plate capable of making packing compact during transportation to improve transportation efficiency, and an indoor unit of an air conditioner that comprises a housing including the top plate.SOLUTION: A top plate forms a box-shaped housing that houses a heat exchanger and an air blower. The top plate has an inner surface part facing a space side in the housing in which the heat exchanger and the air blower are housed, an outer surface part opposite the inner surface part, and a throttle part that recesses the inner surface part and protrudes the outer surface part. The throttle part is provided with a plurality of fixing parts that fix bolts for attaching the air blower to the top plate. The plurality of fixing parts is positioned so that when the two top plates are overlapped with their inner surface parts facing each other, none of the plurality of fixing parts of one top plate overlaps any of the plurality of fixing parts of the other top plate when viewed in a direction in which the two top plates are overlapped.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] An embodiment of the present invention relates to an indoor unit of an air conditioner including a top plate and a housing including the top plate. [Background technology]

[0002] Indoor units of air conditioners are sometimes installed above the ceiling of a building. The above-the-ceiling space is separated from the interior of the building by a ceiling panel and is the space between the ceiling panel and the roof or floor of the building above. In such ceiling-mounted indoor units, the housing of the indoor unit is placed above the ceiling, and a panel attached to the bottom of the housing is exposed to the room. The panel has an intake port that draws in air from the room and an outlet port that blows air into the room. The panel is also called a decorative panel or interior panel and is installed to enhance the design of the room.

[0003] The indoor unit housing is installed above the ceiling by fastening a hanging bracket to a hanging bolt installed on a beam or the like above the ceiling. The housing has a box-like outer shell with a space surrounded by a top plate and side plates attached to the edges of the top plate so as to hang down. The top plate and side plates are formed, for example, by pressing or bending thin metal sheets. Bolts for attaching the fan housed in the housing are fixed to the top plate by welding, crimping, or other methods.

[0004] For example, when multiple tabletops are transported, two separate tabletops are stacked with the same surfaces facing each other. To increase the strength and durability of the tabletops, which are designed to be thin, the tabletops may be tapered. In this case, when two tabletops are stacked with the same surfaces facing each other, the tapered shape of one tabletop may interfere with the bolts fixed to the other tabletop, causing the package to expand in the direction of the overlap of the two tabletops during transport. As a result, the tabletops may become bulky during transport, reducing transport efficiency. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-84999 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made based on this, and its purpose is to provide a top plate that can be packaged compactly during transportation and improve transportation efficiency, and an indoor unit of an air conditioner that is equipped with a housing that includes the top plate. [Means for solving the problem]

[0007] According to an embodiment, the top plate forms a box-shaped housing that houses a heat exchanger that exchanges heat between indoor air and a refrigerant and a fan that draws in indoor air and blows the air that has been heat exchanged by the heat exchanger into the room. The top plate has an inner surface facing the space in the housing where the heat exchanger and the fan are housed, an outer surface opposite the inner surface, and a tapered portion that recesses the inner surface and protrudes the outer surface. The tapered portion is provided with multiple fixing portions for fixing bolts that attach the fan to the top plate. The multiple fixing portions are positioned so that when two top plates are stacked with their inner surfaces facing each other, none of the multiple fixing portions of one top plate overlaps any of the multiple fixing portions of the other top plate when viewed from the direction in which the two top plates are stacked. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention, as viewed from the indoor side. [Figure 2] 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to this embodiment, viewed from above the ceiling. [Figure 3] 3 is a perspective view showing a cross section of the indoor unit shown in FIG. 2 taken along a predetermined plane. [Figure 4] 3 is a cross-sectional view showing a cross section of the indoor unit shown in FIG. 2 taken along a predetermined plane. [Figure 5] 1 is a perspective view showing the top plate of a housing provided in an indoor unit of a ceiling-embedded air conditioner according to the present embodiment, from the inner surface side and the outer surface side. [Figure 6] 6 is a perspective view showing a cross section of the top plate shown in FIG. 5 taken along a predetermined plane. [Figure 7] FIG. 10 is a diagram illustrating the packaging of two top plates according to the present embodiment. [Figure 8] 8 is a diagram schematically illustrating the state of the vicinity of each fixing portion of two top plates packed as shown in FIG. 7. FIG. [Figure 9] FIG. 10 is a perspective view schematically showing the vicinity of a drawn portion of one of the top plates in a packaging style according to a modified example of the present embodiment, viewed from the outer surface side of the top plate. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention will be described below with reference to the accompanying drawings, in which an indoor unit of an air conditioner is embedded in the ceiling of a building and connected by piping to an outdoor unit installed on the roof of the building, for example, to form a refrigeration cycle that conditions the air in the rooms of the building.

[0010] Figures 1 to 4 show the configuration of an indoor unit of an air conditioner according to this embodiment. Figure 1 is a perspective view of an indoor unit of a ceiling-mounted air conditioner, viewed from the indoor side. Figure 2 is a perspective view of the indoor unit shown in Figure 1, viewed from the under-the-ceiling side. Figure 3 is a perspective view showing a cross section of the indoor unit shown in Figure 2, taken along a predetermined plane. Figure 4 is a cross section of the indoor unit shown in Figure 2, taken along a predetermined plane. The predetermined plane in Figures 3 and 4 is, for example, a plane along the vertical direction.

[0011] As shown in Figures 1 to 4, the indoor unit 1 of the air conditioner has, as its main elements, a unit body 2 installed in the ceiling and a panel (hereinafter referred to as a decorative panel) 3 attached to the lower end of the unit body 2.

[0012] The decorative panel 3 is placed along the ceiling (not shown) of the space to be air-conditioned, and covers the opening at the lower end of the housing 4 from the inside of the room. The decorative panel 3 includes a grill (hereinafter referred to as an intake grill) 80 and a frame 81.

[0013] Intake grille 80 is located in the center of decorative panel 3, rotatably supported by frame body 81, and is an element that shields intake port 87 that draws indoor air into housing 4. Intake grille 80 has a substantially square outer frame portion 82 and a lattice portion 83 surrounded by outer frame portion 82. Lattice portion 83 is located directly below blower 10.

[0014] The frame 81 of the decorative panel 3 is, for example, a substantially square-shaped element that surrounds the intake grille 80 and has first to fourth sides 85a, 85b, 85c, and 85d and four corners 86a, 86b, 86c, and 86d. The square area surrounded by the inner peripheral edges of the first to fourth sides 85a, 85b, 85c, and 85d defines the intake port 87. The decorative panel 3 is detachably connected to the housing 4 at the four corners 86a, 86b, 86c, and 86d of the frame 81. As a result, the lower end of the unit main body 2 is covered by the decorative panel 3.

[0015] The decorative panel 3 has four air outlets 88 that blow out the air that has undergone heat exchange in the heat exchanger into the room. The air outlets 88 are formed on the first to fourth side portions 85a, 85b, 85c, and 85d of the frame body 81.

[0016] Four louvers 89 are rotatably supported on the frame 81 of the decorative panel 3. The louvers 89 are elements that change the blowing direction of air blown into the room from the air outlet 88, and are formed in the shape of flat, elongated plates. The louvers 89 are rotatable between a closed position that closes the air outlet 88 and an open position that tilts to open the air outlet 88. When the louvers 89 are rotated to the closed position, the four louvers 89 are horizontal and completely cover the first to fourth sides 85a, 85b, 85c, and 85d of the frame 81, respectively.

[0017] The unit main body 2 includes a housing 4. The housing 4 is configured in a box shape that opens toward the room, and is suspended from a beam above the ceiling via a plurality of suspension bolts (not shown), for example.

[0018] The housing 4 has a thin top panel 4a and side panels 4b made of sheet metal or the like. In the illustrated example, the top panel 4a is slightly smaller than the approximately square decorative panel 3 and has a substantially octagonal planar shape with portions corresponding to the corners of the decorative panel 3 beveled. The planar shape is formed by the outline of the top panel 4a when viewed vertically. The side panels 4b have eight main surfaces that surround the periphery of the top panel 4a.

[0019] Of these, the first, third, fifth and seventh surface portions 41b, 43b, 45b and 47b are surface portions that extend along the four sides of the decorative panel 3, and the second, fourth, sixth and eighth surface portions 42b, 44b, 46b and 48b are surface portions that extend along diagonally dropped sides at locations corresponding to the corners of the decorative panel 3. The inner surfaces of the top plate 4a and the side plates 4b (the first to eighth surface portions 41b to 48b) are covered with a heat insulating material 4c made of, for example, polystyrene foam.

[0020] As shown in FIGS. 2, 3 and 4, the housing 4 accommodates a blower 10 and a heat exchanger 11 inside.

[0021] The blower 10 draws in air from the space to be air-conditioned, i.e., the room, and blows the air into the room after heat exchange in the heat exchanger 11. The blower 10 is a so-called centrifugal fan that draws in air in the axial direction and blows it out in the circumferential direction. The blower 10 has a fan motor 10a and a fan unit 10b. The fan motor 10a is fixed to the top plate 4a of the housing 4 with bolts 14 and rotates a rotating shaft 10c. The fan unit 10b has a plurality of blades 10d arranged at a predetermined pitch in the circumferential direction, is attached concentrically to the tip of the rotating shaft 10c, and rotates together with the rotating shaft 10c.

[0022] The heat exchanger 11 exchanges heat between the air in the space to be air-conditioned, i.e., the room, and the refrigerant, thereby conditioning the room. The heat exchanger 11 is disposed inside the housing 4 so as to surround the blowing side of the fan 10. The heat exchanger 11 includes a plurality of heat dissipation fins 12 and a plurality of heat transfer tubes 13 through which the refrigerant flows. Each of the heat dissipation fins 12 is a long, narrow plate extending in the height direction of the housing 4 (the up-and-down direction in FIG. 4 ) and is arranged at intervals from one another around the periphery of the housing 4. The heat transfer tubes 13 are arranged at intervals from one another in the height direction and the horizontal direction (the direction perpendicular to the height direction) of the housing 4. Furthermore, the heat transfer tubes 13 penetrate the heat dissipation fins 12, thereby being thermally connected to the heat dissipation fins 12.

[0023] The ends of the heat transfer tubes 13 connected to the heat exchanger 11 are arranged in the space between the fourth surface 44b of the side plate 4b of the housing 4 and the heat exchanger 11, and are connected to a pair of connection ports 13a, 13b via a header and connection piping (neither of which is shown). The connection ports 13a, 13b protrude outside the housing 4 from a recessed portion of the fourth surface 44b, and are connected to an outdoor unit of the air conditioner (not shown) via a liquid pipe and a gas pipe (neither of which is shown).

[0024] Next, the top plate 4a of the housing 4 according to this embodiment will be further described. Fig. 5 is a perspective view showing the top plate 4a from the inner surface side and the outer surface side, respectively. Fig. 6 is a perspective view showing a schematic cross section of the top plate 4a shown in Fig. 5 taken along a predetermined plane. The predetermined plane in Fig. 6 is, for example, a plane along the vertical direction.

[0025] As shown in Figures 5 and 6, the top panel 4a has a substantially octagonal planar shape. The top panel 4a has eight edges that connect to the eight surfaces (first to eighth surfaces 41b to 48b) of the side panel 4b. The first, third, fifth, and seventh edges 41a, 43a, 45a, and 47a are edges along the four sides of the decorative panel 3 and connect to the first, third, fifth, and seventh surfaces 41b, 43b, 45b, and 47b of the side panel 4b (see Figures 1 to 4). The second, fourth, sixth, and eighth edges 42a, 44a, 46a, and 48a are edges along diagonally beveled sides corresponding to the corners of the decorative panel 3 and connect to the second, fourth, sixth, and eighth surfaces 42b, 44b, 46b, and 48b of the side panel 4b. The surface 49a surrounded by these eight edges (first to eighth edges 41a to 48a) constitutes the bottom of the box-shaped housing 4. The eight edges (first to eighth edges 41a to 48a) hang down from the surface 49a so as to overlap with the surfaces (first to eighth surfaces 41b to 48b) to which they are connected.

[0026] In the illustrated example, the planar shape of the top plate 4a is approximately octagonal, but it may have any planar shape as long as it can be connected to each surface of the side plate 4b and can form the housing 4 into a box shape together with these surfaces.

[0027] The top plate 4a has a tapered portion 60 on the surface portion 49a. The tapered portion 60 is an uneven portion of the surface portion 49a, for example, by recessing an inner surface portion 71 of the top plate 4a and correspondingly protruding an outer surface portion 72 of the top plate 4a. The inner surface portion 71 of the top plate 4a is a surface portion that faces the space in which the heat exchanger 11 and the blower 10 are housed in the housing 4 that the top plate 4a constitutes, and corresponds to one side of the surface portion 49a. On the other hand, the outer surface portion 72 of the top plate 4a is a surface portion that faces the opposite side from the inner surface portion 71 and corresponds to the other side of the surface portion 49a. For example, when the housing 4 is suspended from a beam above the ceiling, the inner surface portion 71 of the top plate 4a of the housing 4 faces the indoor side, and the outer surface portion 72 faces above the ceiling.

[0028] In this way, the drawn portions 60 are recesses in the inner surface portion 71 and protrusions in the outer surface portion 72. In other words, as shown in Fig. 7 described later, when a top plate 4a having the drawn portions 60 and another top plate 4a are stacked with their inner surfaces 71 facing each other, the drawn portions 60 are configured to increase the opposing distance with the other top plate 4a (the distance between the inner surfaces 71). In other words, when two top plates 4a are stacked with their inner surfaces 71 facing each other, the drawn portions 60 of these top plates 4a are recesses in the inner surfaces 71 and protrusions in the outer surface portions 72 that increase the opposing distance between the two top plates 4a.

[0029] 5 and 6, the drawn portion 60 is disposed in the surface 49a, specifically, in the approximate center of the top panel 4a, when viewed in a direction perpendicular to the surface 49a (the up-down direction in each drawing). Furthermore, when viewed in a direction perpendicular to the surface 49a, the drawn portion 60 has four corners 62, 64, 66, and 68 that are curved and bulged, and the corners 62, 64, 66, and 68 form a contour shape that is continuous with four sides 61, 63, 65, and 67. The sides 61, 63, 65, and 67 are disposed corresponding to the edges 41a, 43a, 45a, and 47a of the top panel 4a. The corners 62, 64, 66, and 68 are disposed corresponding to the edges 42a, 44a, 46a, and 48a of the top panel 4a. Side 61 is continuous in a straight line between corner 62 and corner 68, and side 65 is continuous in a straight line between corner 64 and corner 66. In contrast, side 63 is continuous and recessed in a curved line between corner 62 and corner 64, and side 67 is continuous and recessed in a curved line between corner 66 and corner 68.

[0030] In addition to the drawn portion 60, the top plate 4a also has a plurality of drawn portions surrounding the drawn portion 60. As an example, in this embodiment, as shown in FIG. 6, the drawn portion 60 (hereinafter also referred to as the first drawn portion 60a) is the innermost, and eight drawn portions (hereinafter referred to as the second to ninth drawn portions 60b, 60c, 60d, 60e, 60f, 60g, 60h, and 60i) are arranged on the outer side, for a total of nine drawn portions. The second drawn portion 60b, the fourth drawn portion 60d, the seventh drawn portion 60g, and the ninth drawn portion 60i are convex portions of the inner surface portion 71 and concave portions of the outer surface portion 72. The third drawn portion 60c, the fifth drawn portion 60e, the sixth drawn portion 60f, and the eighth drawn portion 60h are concave portions of the inner surface portion 71 and convex portions of the outer surface portion 72.

[0031] As shown in FIG. 6, adjacent throttle portions are connected to each other via connecting portions 60j, 60k, 60l, 60m, 60n, 60o, 60p, and 60q whose cross sections in a predetermined plane perpendicular to the surface portion 49a are inclined.

[0032] As shown in Fig. 5, the restrictor 60 (first restrictor 60a) is provided with a plurality of fixing portions 90 for fixing bolts 14 that attach the fan 10 to the top plate 4a. The bolts 14 are fixed to the fixing portions 90 by, for example, welding or crimping, with the heads 14a positioned on the outer surface portion 72 side and the shafts 14b positioned on the inner surface portion 71 side. As shown in Fig. 4, the fan motor 10a is fixed to the bolts 14 with, for example, washers 15 and nuts 16, thereby attaching the fan 10 to the top plate 4a.

[0033] As shown in FIGS. 5 and 6 , the fixing portion 90 is configured by protruding the inner surface portion 71 of the drawn portion 60 and recessing the outer surface portion 72 of the drawn portion 60. That is, the fixing portion 90 is a convex portion of the inner surface portion 71 and a concave portion of the outer surface portion 72. In the illustrated example, the fixing portion 90 has a shape in which the outer surface portion 72 is recessed in a truncated cone shape (in other words, the inner surface portion 71 protrudes in a truncated cone shape). By recessing the outer surface portion 72 of the fixing portion 90 in this shape, the head 14a of the bolt 14 can be embedded in this recess. This prevents the head 14a of the bolt 14 from protruding beyond the outer surface portion 72 from the drawn portion 60, or more specifically, the surface portion 49a of the top plate 4a, as shown in FIG. 5 .

[0034] As shown in FIGS. 5 and 6, the top plate 4a is provided with three fixing portions 91, 92, and 93. However, the number of fixing portions is not limited to this. When the top plate 4a is rotated by a predetermined rotation angle around a predetermined axis C (see FIG. 5) and turned upside down, the positions of the fixing portions 91, 92, and 93 after rotation and turning do not overlap with any of the positions of the fixing portions 91, 92, and 93 before rotation and turning. The axis C may be, for example, an axis that passes vertically through the center of gravity of the top plate 4a, or an axis that is concentric with the rotation axis 10c of the blower 10. Turning the top plate 4a upside down means flipping the top plate 4a so that the inner surface 71 and the outer surface 72 of the top plate 4a face in opposite directions.

[0035] 5, the top plate 4a is rotated and turned upside down so that the first edge 41a and the fifth edge 45a, the second edge 42a and the fourth edge 44a, the third edge 43a and the third edge 43a, the fourth edge 44a and the second edge 42a, the fifth edge 45a and the first edge 41a, the sixth edge 46a and the eighth edge 48a, the seventh edge 47a and the seventh edge 47a, and the eighth edge 48a and the sixth edge 46a of the top plate 4a overlap in the vertical direction relative to the surface 49a. At this time, the three positions of the fixing portions 91, 92, and 93 after rotation and turning do not overlap with any of the positions of the fixing portions 91, 92, and 93 before rotation and turning in the vertical direction, i.e., in the overlapping direction of the top plate 4a.

[0036] In this case, as shown in Fig. 5, the rotated top plate 402 is in a state in which the top plate 401 before rotation has been rotated 180° around axis C. Furthermore, the top plate 402 after inversion is in a state in which the inner surface portion 71 of the top plate 401 before inversion faces the inner surface portion 71 of the top plate 402. In this state, the three positions of the fixing portions 91, 92, and 93 after rotation and inversion do not overlap any of the positions of the fixing portions 91, 92, and 93 before rotation and inversion when viewed in the overlapping direction of the top plates 401 and 402. Note that as long as there is no overlap, the rotation angle of the top plate 402 about axis C does not have to be 180°.

[0037] That is, the three fixing portions 91, 92, 93 are arranged in the drawn portion 60 of the top plate 4a so that the contour shape connecting these fixing portions 91, 92, 93 is not point-symmetric with respect to a point on the axis C. This contour shape is a locus connecting the center points of the fixing portions 91, 92, 93 when viewed from the vertical direction, in other words, the positions of the axial centers of the shanks 14b of the bolts 14. In the illustrated example, the contour shapes of the fixing portions 91, 92, 93 are triangular.

[0038] When a plurality of top plates 4a having such a configuration are transported, for example, two separate top plates 4a are transported stacked with their inner surfaces 71 facing each other. In this embodiment, one of the two top plates 4a is rotated a predetermined angle (for example, 180°) around a predetermined axis (for example, axis C shown in FIG. 5) and turned upside down relative to the other top plate 4a, and the top plates are stacked so that their inner surfaces 71 face each other, forming a set. The state in which the two top plates 4a are stacked in this way (hereinafter referred to as packaged state) will be described next.

[0039] Fig. 7 is a diagram schematically showing the packaging of two tabletops 4a (401, 402). Fig. 8 is a diagram schematically showing the state of the vicinity of each fixing portion 90 (91, 92, 93) of the two tabletops 4a (401, 402) packaged as shown in Fig. 7.

[0040] In the example shown in Fig. 7, the top plates 401 and 402 shown in Fig. 5 are stacked with their inner surfaces 71 facing each other. In the packaged state shown in Fig. 7, the fourth edge 44a of the top plate 401 and the second edge 42a of the top plate 402 are in contact, the fifth edge 45a of the top plate 401 and the first edge 41a of the top plate 402 are in contact, and the sixth edge 46a of the top plate 401 and the eighth edge 48a of the top plate 402 are in contact. Although not shown, in the packaging shown in Figure 7, the first edge 41a of the top plate 401 and the fifth edge 45a of the top plate 402, the second edge 42a of the top plate 401 and the fourth edge 44a of the top plate 402, the third edge 43a of the top plate 401 and the third edge 43a of the top plate 402, the seventh edge 47a of the top plate 401 and the seventh edge 47a of the top plate 402, and the eighth edge 48a of the top plate 401 and the sixth edge 46a of the top plate 402 are in contact with each other in a similar manner.

[0041] These edges are not particularly joined but are butted together, however, the two top plates 401 and 402 may be integrated by temporarily fastening the edges together.

[0042] The top plates 401 and 402 in the packaged state shown in Fig. 7 have their fixing parts 991, 92, and 93 positioned relative to each other as shown in Fig. 8. As described above, when the top plate 402 is rotated 180° about the axis C (see Fig. 5) relative to the top plate 401 and turned upside down, the three positions of the fixing parts 91, 92, and 93 of the top plate 402 do not overlap with any of the positions of the fixing parts 91, 92, and 93 of the top plate 401 in the overlapping direction of the top plates 401 and 402.

[0043] 8, the bolts 14 fixed to the fixing portions 91, 92, and 93 of the top plate 401 and the bolts 14 fixed to the fixing portions 91, 92, and 93 of the top plate 402 do not interfere with each other. In other words, the shanks 14b of these bolts 14 do not come into contact with the shanks 14b of the other bolts 14.

[0044] Furthermore, the top plates 401, 402 each have a drawn portion 60 so as to widen the opposing distance between them (the distance between the inner surface portions 71). The fixing portions 91, 92, 93 are provided on the drawn portion 60 that widens the opposing distance between the top plates 401, 402. Therefore, because the opposing distance between the top plates 401, 402 is widened by the drawn portion 60, the end portions 14c of the bolts 14 fixed to the fixing portions 91, 92, 93 of the top plate 401 do not come into contact with the drawn portion 60 of the top plate 402. Similarly, the end portions 14c of the bolts 14 fixed to the fixing portions 91, 92, 93 of the top plate 402 do not come into contact with the drawn portion 60 of the top plate 401.

[0045] As described above, according to this embodiment, the shank 14b and end 14c of the bolt 14 fixed to the fixing portion 90 of one of the two top plates 4a that form a pair in the package do not interfere with the shank 14b and end 14c of the bolt 14 fixed to the fixing portion 90 of the other top plate 4a. This prevents the package of these top plates 4a from expanding in the stacking direction. This allows the package of the top plates 4a to be made more compact during transportation, improving transportation efficiency.

[0046] Here, depending on the length of the shank 14b of the bolt 14 fixed to the fixing portion 90, for example, the end 14c of the bolt 14 may come into contact with the drawn portion 60 of the other of the two top plates 4a that form a pair in the packaged state. A modified version of this embodiment that takes this case into consideration is shown in Figure 9. This modified version is the same as the above-described embodiment except for the differences described below. Therefore, except for the differences, the same reference numerals are used in the drawings and reference is made to the above-described embodiment as appropriate, and a description thereof will be omitted.

[0047] 9 is a perspective view showing the vicinity of the drawn portion of one of the two top plates that form a pair in the packaged state, viewed from the outer surface side of the top plate. As shown in FIG. 9, top plate 40a has a plurality of holes 100 in drawn portion 60 (first drawn portion 60a). Holes 100 penetrate drawn portion 60 from outer surface portion 72 to inner surface portion 71 (see FIG. 8). The diameter of hole 100 is larger than the diameters of shaft portion 14b and end portion 14c of bolt 140. In the illustrated example, three holes 101, 102, and 103 are provided in top plate 40a.

[0048] These holes 101, 102, and 103 are arranged at positions that overlap the positions of bolts 140 fixed to the fixing portions of the other top plate of the pair that form the package, as viewed in the overlapping direction of the top plates. In other words, when top plate 40a is rotated a predetermined angle, for example, 180°, about a predetermined axis (axis C shown in FIG. 5, as an example) and turned upside down, holes 101, 102, and 103 are arranged so that fixing portions 91, 92, and 93 are positioned corresponding to the positions after such rotation and turning.

[0049] In other words, when the other top plate that forms a pair with top plate 40a in the packaged state is rotated 180° around axis C relative to top plate 40a and turned upside down, holes 101, 102, and 103 are arranged at positions that overlap the positions of the three fixing parts of the top plate and the direction in which the top plates overlap.

[0050] Therefore, when the top plate 40a is packaged with another identical top plate, the holes 101, 102, and 103 of the top plate 40a can overlap with the bolts 140 of the other top plates in the overlapping direction of the top plates. Therefore, even if the bolt 140 has a shank 14b long enough that the end 14c contacts the drawn portion 60 of the top plate 40a in the package, the shank 14b and end 14c of the bolt 140 can be passed through the holes 101, 102, and 103. In other words, it is possible to prevent the end 14c of the bolt 140 from contacting the drawn portion 60 of the top plate 40a, in other words, to prevent the end 14c of the bolt 140 from interfering with the drawn portion 60 of the top plate 40a. This prevents the package from expanding in the overlapping direction of the top plates, allowing for a more compact package during transportation.

[0051] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0052] 1... Indoor unit of air conditioner, 2... Unit body, 3... Panel (ceiling panel), 4... Housing, 4a, 401, 402, 40a... Top plate, 4b... Side plate, 4c... Heat insulating material, 10... Blower, 10a... Fan motor, 10b... Fan section, 10c... Rotating shaft, 10d... Blade, 11... Heat exchanger, 12... Heat dissipation fin, 13... Heat transfer tube, 13a, 13b... Connection port, 14, 140... Bolt, 14a... Bolt head, 14b... Bolt Shank portion, 14c...bolt end portion, 15...washer, 16...nut, 41a...first edge portion, 42a...second edge portion, 43a...third edge portion, 44a...fourth edge portion, 45a...fifth edge portion, 46a...sixth edge portion, 47a...seventh edge portion, 48a...eighth edge portion, 49a...face portion, 41b...first face portion, 42b...second face portion, 43b...third face portion, 44b...fourth face portion, 45b...fifth face portion, 46b...sixth face portion, 47b ...7th surface portion, 48b...8th surface portion, 60...drawing portion, 60a...1st drawing portion, 60b...2nd drawing portion, 60c...3rd drawing portion, 60d...4th drawing portion, 60e...5th drawing portion, 60f...6th drawing portion, 60g...7th drawing portion, 60h...8th drawing portion, 60i...9th drawing portion, 60j, 60k, 60l, 60m, 60n, 60o, 60p, 60q...continuous portion, 61, 63, 65, 67...side portion, 62, 64, 66, 68...corner portion, 71...inner surface portion, 72...outer surface portion, 80...grill (intake grill), 81...frame body, 82...outer frame portion, 83...lattice portion, 85a...first side portion, 85b...second side portion, 85c...third side portion, 85d...fourth side portion, 86a, 86b, 86c, 86d...corner portion, 87...intake port, 88...outlet port, 89...louver, 90, 91, 92, 93...fixed portion, 100, 101, 102, 103...hole portion, C...axis.

Claims

1. A top plate of a box-shaped housing that houses a heat exchanger that performs heat exchange between indoor air and a refrigerant, and a blower that draws in the indoor air and blows the air that has been heat exchanged in the heat exchanger into the room, the top plate has an inner surface portion facing a space in the housing in which the heat exchanger and the fan are accommodated, an outer surface portion opposite the inner surface portion, and a drawing portion that recesses the inner surface portion and protrudes the outer surface portion, the restricting portion is provided with a plurality of fixing portions for fixing bolts for attaching the fan to the top plate, The plurality of fixing portions are arranged at positions such that, when the two top plates are stacked with the inner surfaces facing each other, none of the fixing portions of one of the top plates overlaps any of the fixing portions of the other top plate when viewed from the stacking direction of the two top plates. Top plate.

2. The plurality of fixing portions are arranged in positions such that, when one top plate is rotated by a predetermined angle relative to the other top plate around a predetermined axis along the overlapping direction of the two top plates and the two top plates are stacked with their inner surfaces facing each other, each of the plurality of fixing portions of one top plate does not overlap any of the plurality of fixing portions of the other top plate as viewed in the overlapping direction of the two top plates. The top plate according to claim 1 .

3. The plurality of fixing portions are configured by projecting the inner surface portion of the narrowed portion and recessing the outer surface portion. The top plate according to claim 2 .

4. the throttle portion has a plurality of holes penetrating from the inner surface portion to the outer surface portion, The plurality of holes are arranged at positions such that, when the two top plates are stacked with the inner surfaces facing each other, each of the plurality of holes of one of the top plates overlaps with one of the bolts fixed to the plurality of fixing portions of the other top plate, as viewed from the stacking direction of the two top plates. The top plate according to any one of claims 1 to 3.

5. The throttle portion is provided with three or more of the fixing portions, The bolts are fixed to the three or more fixing portions, respectively. The top plate according to claim 4.

6. The throttle portion is provided with three of the fixing portions, The three fixing portions are such that the shape of a locus connecting the positions of the axial centers of the bolts fixed to the fixing portions when viewed from the overlapping direction of the two top plates forms a triangle. The top plate according to claim 5.

7. the heat exchanger; The blower; the housing having a box shape that opens toward the room, that houses the heat exchanger and the fan, and that has the top plate according to claim 6. Air conditioner indoor unit.

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