Indoor unit of air conditioner

Abstract

Provided is an indoor unit of an air conditioner. The embodiment of the invention relates to an indoor unit of an air conditioner. Provided is an indoor unit for an air conditioner in which a hanger can be fixed to a hanger bolt without causing deformation or the like in a case. An indoor unit of an air conditioner according to an embodiment includes a heat exchanger, a blower, and a casing. The housing accommodates the heat exchanger and the blower, and is fixed to a hanger bolt provided with a space separated from the interior by a ceiling. The box body is provided with a hanging piece fixed on the hanging bolt; an insertion port into which the hanger is inserted from the inner surface side of the case and which protrudes toward the outer surface side of the case; and a reinforcing portion that reinforces the vicinity of the insertion port at least in a portion of the edge of the insertion port.

Description

[0001] This application is based on Japanese Patent Application No. 2024-011097 (filing date: January 29, 2024) and claims the priority of this application. This application incorporates all the contents of this application by reference. Technical Field

[0002] An embodiment of the present invention relates to an indoor unit of an air conditioner. Background Art

[0003] The indoor unit of an air conditioner is sometimes installed on the back side of the ceiling of a building. The back side of the ceiling is separated from the interior of the building by the ceiling and is a space between the ceiling and the roof of the building or the floor of the upper layer. For such a ceiling-embedded type indoor unit, for example, the casing of the indoor unit is arranged on the back side of the ceiling, and a panel installed below the casing is exposed to the interior. The panel has an air inlet for sucking indoor air and an air outlet for blowing air into the interior. In addition, the panel is called a decorative panel, an interior panel, etc., and is installed to improve the exterior design of the interior.

[0004] The casing of the indoor unit is installed on the back side of the ceiling, for example, by fixing a hanging member to a hanging bolt provided on a beam or the like on the back side of the ceiling. The outer contour of the casing is configured in a box shape having a space surrounded by a top surface portion and side surface portions hanging down from the edges of the top surface portion. The top surface portion and the side surface portions are formed, for example, by stamping and bending a thin-walled sheet material.

[0005] The side surface portion has an insertion port for inserting a hanging member from the inner surface side of the side surface portion. The hanging member inserted into the insertion port is screwed to the side surface portion and protrudes to the outer surface side of the side surface portion, and is fixed to the hanging bolt. The insertion port is formed, for example, by punching a corresponding portion of the sheet material when forming the side surface portion. In a state where the hanging member screwed to the side surface portion is fixed to the hanging bolt and the casing is installed on the back side of the ceiling of the building, the self-weight of the indoor unit (casing and panel) acts on the hanging member.

[0006] When the indoor unit is fixed to the hanging bolt by a plurality of hanging members, for example, if the balance of the forces acting on each hanging member is broken and the force acts concentratedly on a specific hanging member, the casing may be deformed or the like depending on the magnitude of the force. Summary of the Invention

[0007] The problem to be solved by the present invention is to provide an indoor unit of an air conditioner that can fix a hanging member to a hanging bolt without deforming the casing or the like.

[0008] The indoor unit of an air conditioner according to an embodiment includes a heat exchanger, a blower, and a casing. The heat exchanger exchanges heat between the air in a building room and a refrigerant. The blower sucks in the air in the room and blows out the air heat-exchanged by the heat exchanger into the room. The casing houses the heat exchanger and the blower and is fixed to a hanging bolt provided in a space separated from the room by a ceiling. The casing has: a hanging member fixed to the hanging bolt; an insertion port through which the hanging member is inserted from the inner surface side of the casing to project the hanging member toward the outer surface side of the casing; and a reinforcing portion that reinforces at least a part of the vicinity of the insertion port at the edge of the insertion port.

[0009] According to the indoor unit of the air conditioner having the above-described configuration, the hanging member can be fixed to the hanging bolt without causing deformation or the like of the casing. BRIEF DESCRIPTION OF THE DRAWINGS <>

[0010] Figure 1 is a perspective view schematically showing an indoor unit of a ceiling-embedded type air conditioner according to an embodiment.

[0011] Figure 2 is schematically showing from the back side of the ceiling of a building Figure 1 a top view of the indoor unit shown.

[0012] Figure 3 is a perspective view schematically showing an example of a state in which the casing of the indoor unit according to the embodiment is fixed to the hanging bolt.

[0013] Figure 4 is from a Figure 3 different viewpoint schematically showing Figure 3 an example of a state in which the casing shown is fixed to the hanging bolt.

[0014] Figure 5 is a perspective view schematically showing the form of the insertion port of the hanging member in the casing of the indoor unit according to the embodiment.

[0015] Figure 6 is a view showing a schematic configuration of the vicinity of a first insertion port including a reinforcing portion of the casing of the indoor unit according to the embodiment in a cross section viewed from the arrow direction at a portion indicated by an arrow A2 in a side surface portion of the casing Figure 2 is a view showing a schematic configuration of the vicinity of a first insertion port including a reinforcing portion of the casing of the indoor unit according to a first modification of the embodiment in a cross section viewed from the arrow direction at a portion the same as the portion indicated by the arrow A2 in the side surface portion of the casing

[0016] Figure 7 is a view showing a schematic configuration of the vicinity of a first insertion port including a reinforcing portion of the casing of the indoor unit according to a first modification of the embodiment in a cross section viewed from the arrow direction at a portion the same as the portion indicated by the arrow A2 in the side surface portion of the casing Figure 2 is a view showing a schematic configuration of the vicinity of a first insertion port including a reinforcing portion of the casing of the indoor unit according to a first modification of the embodiment in a cross section viewed from the arrow direction at a portion the same as the portion indicated by the arrow A2 in the side surface portion of the casing

[0017] Figure 8 Therefore, a cross-section of the indoor unit of the second modification of the embodiment, as viewed from the arrow direction at a position the same as the position indicated by arrow A2 on the side surface portion of the cabinet, shows a schematic configuration near the first insertion port including a reinforcing portion of the cabinet of the indoor unit. Figure 2 Specific Embodiments Specific embodiments

[0018] Hereinafter, the indoor unit of the air conditioner according to the embodiment of the present invention will be described with reference to the accompanying drawings. The indoor unit of such an air conditioner is buried in the ceiling of a building and is connected, for example, by piping to an outdoor unit installed on the roof of the building or the like to form a refrigeration cycle, and the air in the interior of the building is conditioned.

[0019] In Figure 1 and Figure 2 the configuration of the indoor unit of the air conditioner according to the present embodiment is schematically shown, respectively. Figure 1 is a perspective view schematically showing the indoor unit of the ceiling-embedded type air conditioner. Figure 2 is a plan view schematically showing the Figure 1 shown indoor unit from the back side of the ceiling of the building.

[0020] As Figure 1 and Figure 2 shown, the indoor unit 1 of the air conditioner mainly includes a unit main body 2 installed on the back side of the ceiling and a panel (hereinafter referred to as a decorative panel) 3 installed at the lower end of the unit main body 2. The lower end of the unit main body 2 is the indoor-side end of the indoor unit 1.

[0021] The unit main body 2 includes a cabinet 4. The cabinet 4 is configured as a box shape that opens toward the indoor side (downward), and is suspended, for example, from a beam on the back side of the ceiling via four hanging bolts (refer to Figure 3 described later).

[0022] The box body 4 has a top surface portion 4a and side surface portions 4b. In the illustrated example, the top surface portion 4a is smaller in size than the decorative panel 3 having a substantially square shape, and forms a substantially octagonal planar shape in which the portions corresponding to the respective corner portions of the decorative panel 3 are obliquely cut off. The planar shape is the shape formed by the contour of the top surface portion 4a when observing the top surface portion 4a from the vertical direction (hereinafter referred to as the up-down direction). The side surface portions 4b have eight surfaces as main surfaces, and surround the periphery of the top surface portion 4a. Among them, the first, third, fifth, and seventh surface portions 41b, 43b, 45b, and 47b are the surface portions along the four side portions of the decorative panel 3, and the second, fourth, sixth, and eighth surface portions 42b, 44b, 46b, and 48b are the surface portions along the side portions where the portions corresponding to the respective corner portions of the decorative panel 3 are obliquely cut off. The inner surfaces of the top surface portion 4a and the side surface portions 4b (the first to eighth surface portions 41b to 48b) are covered, for example, with a heat insulating material made of expanded polystyrene.

[0023] Various elements required for the refrigeration cycle are housed inside the box body 4. In Figure 2 this, as an example, an example of housing the blower 10 and the heat exchanger 11 is shown.

[0024] The blower 10 sucks in the air in the air-conditioning target space, that is, the indoor air, and blows out the air heat-exchanged by the heat exchanger 11 into the room. As the blower 10, a scroll fan (centrifugal fan) that sucks in air from the axial direction and blows it out in the circumferential direction is used. The blower 10 has, for example, a fan drive unit and a fan unit. The fan drive unit is a motor, fixed to the top surface portion 4a of the box body 4, and rotates the rotation shaft. The fan unit has a plurality of blades arranged at a predetermined interval in the circumferential direction, and is concentrically mounted on the front end portion of the rotation shaft and rotates together with the rotation shaft. By the rotation of the fan unit, the indoor air is sucked in from the lower end side of the fan unit.

[0025] The heat exchanger 11 exchanges heat between the air in the air-conditioning target space, that is, the indoor air, and the refrigerant, and air-conditions the room. The heat exchanger 11 is arranged so as to surround the blowing side of the blower 10 inside the box body 4. The heat exchanger 11 includes, for example, a plurality of heat dissipation fins and a plurality of heat transfer tubes through which the refrigerant flows. The heat dissipation fins are long and narrow plates extending in the up-down direction, and are arranged at intervals from each other in the circumferential direction of the box body 4. The heat transfer tubes are arranged at intervals in the up-down direction and the horizontal direction, and are connected in series with each other to form a plurality of flow paths (passages). Further, the heat transfer tubes are heat-connected to the heat dissipation fins by passing through the heat dissipation fins.

[0026] The refrigerant pipes connected to the heat exchanger 11 are arranged in the space between the fourth surface portion 44b in the side surface portion 4b of the box body 4 and the heat exchanger 11, and are connected to a pair of connection ports 13a and 13b. The connection ports 13a and 13b protrude from the portion where a part of the fourth surface portion 44b is recessed to the outside of the box body 4, and are connected to the outdoor unit (not shown) of the air conditioner via a liquid pipe and a gas pipe (both not shown).

[0027] In addition to the blower 10 and the heat exchanger 11, for example, a drain pan 14 (refer to Figure 3 described later) for receiving the condensed water (discharge water) generated by the heat exchange action of the heat exchanger 11, a drain pump (not shown) for discharging the discharge water received by the drain pan 14, etc. are also housed inside the box body 4. The drain pan 14 is configured, for example, in a frame shape corresponding to the arrangement area of the heat exchanger 11, and is arranged below the heat exchanger 11. The discharge water received by the drain pan 14 is discharged through a drain hose (not shown) connected to the drain port 12. The drain pump is arranged near the drain port 12.

[0028] The decorative panel 3 is arranged in a posture along the ceiling (not shown) and covers the opening at the lower end of the box body 4 from the indoor side. As Figure 1 shown, the decorative panel 3 includes a grille (hereinafter referred to as an intake grille) 31 and a frame body 32.

[0029] The intake grille 31 is located at the central portion of the decorative panel 3 and is rotatably supported by the frame body 32 to shield the intake port (the operation opening 35 described later) for sucking indoor air into the box body 4. The intake grille 31 includes a square outer frame portion 31a and a lattice portion 31b surrounded by the outer frame portion 31a. The lattice portion 31b is located directly below the blower 10 and has a detachable filter (not shown).

[0030] The frame body 32 is configured in a square frame shape surrounding the intake grille 31. The frame body 32 has first to fourth side portions 33a, 33b, 33c, 33d, and four corner portions 34a, 34b, 34c, 34d.

[0031] The first to fourth side portions 33a, 33b, 33c, and 33d extend along the outer peripheral edge of the outer frame portion 31a of the suction grille 31. The corner portions 34a, 34b, 34c, and 34d are located at the four corners of the decorative panel 3 and integrally connect the first to fourth side portions 33a, 33b, 33c, and 33d that are adjacent in the circumferential direction of the housing 32. A quadrilateral region surrounded by the inner peripheral edges of the first to fourth side portions 33a, 33b, 33c, and 33d defines the operation opening 35. The operation opening 35 is an opening portion for exposing the inside of the housing 4 to the room to simply perform, for example, cleaning and maintenance of the blower 10, the heat exchanger 11, etc. In addition, the operation opening 35 corresponds to the suction port for sucking the indoor air into the housing 4.

[0032] The decorative panel 3 is detachably connected to the housing 4 at the portions of the four corner portions 34a, 34b, 34c, and 34d of the housing 32. Thus, the lower end of the unit main body 2 is covered by the decorative panel 3.

[0033] The decorative panel 3 has four air outlets 37 for blowing the air heat-exchanged by the heat exchanger 11 into the room. The air outlets 37 are formed in the first to fourth side portions 33a, 33b, 33c, and 33d of the housing 32.

[0034] Four louvers 36 are rotatably supported on the housing 32 of the decorative panel 3. The louvers 36 are elements for changing the blowing direction of the air blown from the air outlets 37 into the room and are formed in a flat and elongated plate shape. The louvers 36 can rotate between a closed position for closing the air outlets 37 and an open position inclined to open the air outlets 37. In a state where the louvers 36 rotate to the closed position, the louvers 36 become horizontal and completely cover the first to fourth side portions 33a, 33b, 33c, and 33d of the housing 32.

[0035] For example, one side of the outer frame portion 31a of the suction grille 31 of the decorative panel 3 is selectively rotatably connected to any one of the first to fourth side portions 33a, 33b, 33c, and 33d of the housing 32. Therefore, the suction grille 31 can rotate between a first position for closing the operation opening 35 and a second position for opening the operation opening 35. Further, in a state where the suction grille 31 is rotated to the second position, the suction grille 31 is detached from the housing 32.

[0036] As described above, the indoor unit 1 having such a configuration is buried in the ceiling of a building. At this time, the unit main body 2 is fixed to the back surface of the ceiling by hanging bolts provided on a beam or the like provided on the back surface of the ceiling. In the present embodiment, as an example, the housing 4 is fixed to four hanging bolts.

[0037] Figure 3This is a perspective view schematically showing an example of the state where the box body 4 is fixed to the hanging bolt 90. Figure 4 This is from a Figure 3 different viewpoint and schematically shows Figure 3 an example of the state where the box body 4 shown is fixed to the hanging bolt 90. As Figures 1 to 4 shown, the box body 4 has a hanging member 51 fixed to the hanging bolt 90 and an insertion port 52 into which the hanging member 51 is inserted. One hanging member 51 and one insertion port 52 are respectively arranged on each of the four faces 42b, 44b, 46b, and 48b of the side face portion 4b of the box body 4. Among them, Figure 3 and Figure 4 show the state where the box body 4 is fixed to the hanging bolt 90 by the hanging member 51 inserted into the insertion port 52 arranged on the Figure 1 and Figure 2 shown eighth face 48b. Hereinafter, taking the forms of the hanging member 51 and the insertion port 52 described in Figure 3 and Figure 4 as an example for description, but for the hanging member 51 and the insertion port 52 arranged on the remaining three faces 42b, 44b, and 46b, taking the forms shown in Figure 3 and Figure 4 as a standard, the same description can be applied.

[0038] The hanging member 51 is a thin-walled metal member having a plurality of bending portions, notch portions, threaded holes, etc. In the illustrated example, the hanging member 51 includes three piece portions 51a, 51b, and 51c as main components. The first piece portion 51a and the second piece portion 51b are continuous via the third piece portion 51c and stand up in the same direction with respect to the third piece portion 51c. In the state where the hanging member 51 is inserted into the insertion port 52, the first piece portion 51a and the second piece portion 51b become faces substantially parallel to the horizontal direction, and the third piece portion 51c becomes a face substantially parallel to the vertical direction.

[0039] The first piece portion 51a is the part fixed to the hanging bolt 90. In the illustrated example, the first piece portion 51a is sandwiched between two nuts 91a and 91b provided on the hanging bolt 90 and connected to the hanging bolt 90. Thus, the hanging member 51 is fixed to the hanging bolt 90.

[0040] The second piece portion 51b is the part for fixing the drain pan 14 and the decorative panel 3. In the present embodiment, the drain pan 14 is fastened to the second piece portion 51b by a screw 81, and the decorative panel 3 is fastened to the second piece portion 51b by a screw 82. Thus, the drain pan 14 and the decorative panel 3 are fastened to the second piece portion 51b. For example, the second piece portion 51b fastens and fixes the drain pan 14 and the decorative panel 3 via brackets or the like respectively provided on the drain pan 14 and the decorative panel 3.

[0041] The third piece portion 51c is a part of the eighth face portion 48b fixed to the side face portion 4b of the box body 4. In the illustrated example, the third piece portion 51c is fixedly fastened to the eighth face portion 48b by a screw 83. For example, the screw 83 is inserted through a screw insertion hole 49 (described later) of the eighth face portion 48b and fastened to a threaded hole of the third piece portion 51c. Thus, the hanging member 51 inserted into the insertion port 52 of the eighth face portion 48b is fixed to the eighth face portion 48b.

[0042] Figure 5 is a perspective view schematically showing the form of the insertion port 52. In Figure 5 the open form of the insertion port 52 into which the hanging member 51 is not inserted is shown. Figure 5 The state shown is a state in which the box body 4 is fixed to the hanging bolt 90 and Figure 4 for convenience, the hanging member 51 and the hanging bolt 90 are omitted. The insertion port 52 is a through-hole penetrating the eighth face portion 48b, and the hanging member 51 is inserted from the inner surface side of the box body 4 so that the hanging member 51 protrudes toward the outer surface 48s side of the box body 4.

[0043] As Figure 5 shown, the insertion port 52 has a first insertion port 52a into which the first piece portion 51a of the hanging member 51 is inserted and protrudes, and a second insertion port 52b into which the second piece portion 51b of the hanging member 51 is inserted and protrudes.

[0044] When observed in the direction in which the first insertion port 52a protrudes from the inserted first piece portion 51a, that is, in the direction perpendicular to the eighth face portion 48b, the opening is oblong. That is, the first insertion port 52a forms an opening shape in which the upper edge 61a and the lower edge 62a of the opening are continuously parallel and the edge portions 63a, 64a connecting them at both ends are curved. The height and width of the first insertion port 52a are appropriately adjusted according to the wall thickness and shape of the first piece portion 51a so that the first piece portion 51a can be smoothly inserted. The height of the first insertion port 52a is the distance between the upper edge 61a and the lower edge 62a of the first insertion port 52a. The width of the first insertion port 52a is the maximum distance between the curved edge portions (hereinafter referred to as end edges) 63a, 64a connecting the upper edge 61a and the lower edge 62a of the first insertion port 52a.

[0045] The eighth face portion 48b has a recess 53 continuous with the first insertion port 52a. The recess 53 is a portion that is continuous with a part of the edge of the first insertion port 52a and that depresses the outer surface 48s of the eighth face portion 48b more than the portions other than the outer surface 48s. In the illustrated example, the recess 53 is continuous with the upper edge 61a of the first insertion port 52a, and depresses the outer surface 48s of the eighth face portion 48b corresponding to the wall thickness of the third piece portion 51c continuous with the first piece portion 51a inserted into the first insertion port 52a. That is, the recess 53 is provided continuously with the upper edge 61a of the first insertion port 52a where a reinforcing portion 54 described later is provided. Thus, in a state where the first piece portion 51a of the hanging member 51 is inserted into the first insertion port 52a, the third piece portion 51c contacts the recess 53, and the posture of the hanging member 51 is supported by the recess 53.

[0046] The second insertion port 52b has an opening that is long and round when viewed in a direction protruding from the inserted second piece portion 51b, that is, in a direction perpendicular to the eighth face portion 48b, and an opening that is continuous with the opening and exposes a part of the continuous portion of the second piece portion 51b and the third piece portion 51c. That is, the second insertion port 52b forms an opening shape in which the upper edge 61b and the lower edge 62b of the opening are continuously parallel and the edge portions 63b, 64b at both ends connecting them are bent. The height and width of the second insertion port 52b are appropriately adjusted according to the wall thickness and shape of the second piece portion 51b so that the second piece portion 51b can be inserted smoothly. The height of the second insertion port 52b is the distance between the upper edge 61b and the lower edge 62b of the second insertion port 52b. The width of the second insertion port 52b is the maximum distance between the bent edge portions (hereinafter referred to as end edges) 63b, 64b connecting the upper edge 61b and the lower edge 62b of the second insertion port 52b.

[0047] In the present embodiment, the box body 4 has a reinforcing portion 54 that reinforces the vicinity of the first insertion port 52a at a part of the edge of the first insertion port 52a, that is, the side face portion 4b (the eighth face portion 48b in the illustrated example) where the first insertion port 52a is present. In other words, the reinforcing portion 54 suppresses deformation of the first insertion port 52a and suppresses deformation of the side face portion 4b where the first insertion port 52a is present starting from the first insertion port 52a. The reinforcing portion 54 can be applied in any form as long as it is a form that increases the strength of the side face portion 4b where the first insertion port 52a is present.

[0048] In Figure 6 an example of the form of the reinforcing portion 54 is shown. Figure 6 is in the eighth face portion 48b of the side face portion 4b of the box body 4 Figure 2The cross-section observed from the arrow direction in the part indicated by arrow A2 shows a schematic configuration near the first insertion port 52a including the reinforcing part 54. In the illustrated example, the reinforcing part 54 is provided at the lower edge 62a and both end edges 63a, 64a of the first insertion port 52a to increase the strength of the eighth face part 48b. The strength here is the strength required to overcome the deformation force acting on the eighth face part 48b in a state where the hanging member 51 is fixed to the hanging bolt 90 and the unit main body 2 is installed on the back surface of the ceiling. The deformation force acts, for example, in the area around the screw 83 that fixes the third piece part 51c to the eighth face part 48b toward the outside and inside of the box body 4 and acts in a way that twists (shears) this area. Therefore, the reinforcing part 54 suppresses the deformation of the eighth face part 48b in the eighth face part 48b of the box body 4 where the deformation force acts.

[0049] In Figures 4 to 6 the illustrated example, the reinforcing part 54 is a standing piece that stands up toward the outer surface 48s side of the eighth face part 48b with respect to the eighth face part 48b. For example, the reinforcing part 54 is configured as a standing piece formed by cutting and standing up the lower edge 62a and both end edges 63a, 64a of the first insertion port 52a. In this case, the reinforcing part 54 has a straight piece 54a that is linearly continuous along the lower edge 62a of the first insertion port 52a, and curved pieces 54b, 54c that are curved and continuous along both end edges 63a, 64a of the first insertion port 52a at both ends of the straight piece 54a. The standing height of the reinforcing part 54 (the straight piece 54a and the curved pieces 54b, 54c) with respect to the eighth face part 48b is, for example, equal to or greater than the wall thickness of the hanging member 51, specifically the wall thickness of the first piece part 51a, and is set to be approximately equal as an example.

[0050] Here, as described above, as long as it is a form that increases the strength of the side face part 4b where the first insertion port 52a exists, the form of the reinforcing part can be arbitrary and is not limited to Figures 4 to 6 the illustrated form (standing piece). For example, it can also be Figure 7 and Figure 8 the forms of the deformation examples shown. Hereinafter, these deformation examples of the reinforcing part will be described. In addition, in these deformation examples, the configuration of the indoor unit other than the reinforcing part is the same as that of the indoor unit 1 of the above-described present embodiment, and this configuration can be applied to the same configuration as Figures 1 to 5 shown. Therefore, for the configuration of the indoor unit other than the reinforcing part in the deformation examples, appropriate reference is made to Figures 1 to 5 and the description is omitted.

[0051] In Figure 7 the form of the reinforcing part 55 as the first deformation example of the reinforcing part 54 is shown. Figure 7 It is in the Figure 2A cross-section of the portion indicated by arrow A2, viewed from the direction of the arrow, illustrates the schematic configuration of the area surrounding the first insertion opening 52a, including the reinforcement portion 55. In the illustrated example, the reinforcement portion 55 is configured as a curved piece that rises relative to the eighth surface portion 48b toward the outer surface 48s of the eighth surface portion 48b, and then folds back this raised piece to contact the outer surface 48s of the eighth surface portion 48b. For example, the reinforcement portion 55 is formed by folding the lower edge 62a and the end edges 63a, 64a of the first insertion opening 52a, i.e., folding them back 180 degrees to form a flattened curved piece.

[0052] exist Figure 8 9 shows a configuration of a reinforcement portion 56 as a second modified example of the reinforcement portion 54 . Figure 8 The eighth surface portion 48b of the side surface portion 4b of the box body 4 is Figure 2 A cross-section of the portion indicated by arrow A2, viewed from the direction of the arrow, shows the schematic configuration of the vicinity of the first insertion port 52a, including the reinforcement portion 56. In the illustrated example, the reinforcement portion 56 is configured as a reinforcing sheet that is separate (a separate component) from the eighth surface portion 48b, i.e., the housing 4. For example, the reinforcement portion 56 is a reinforcing sheet having a thickness that is equal to or greater than the thickness of the hanger 51, specifically, the first sheet 51a, or, as an example, is substantially equal. The reinforcement portion 56 is attached to the outer surface 48s, for example, by spot welding, along the periphery of the first insertion port 52a, i.e., the lower edge 62a, and the end edges 63a and 64a.

[0053] Thus, according to this embodiment and its variations, the housing 4 includes reinforcement portions 54, 55, and 56 that reinforce a portion of the edge of the first insertion opening 52a, the side surface portion 4b (the eighth surface portion 48b in the illustrated example) where the first insertion opening 52a is located. Therefore, when the hanger 51 is secured to the hanger bolts 90 and the unit body 2 is mounted on the back of the ceiling, even if a deforming force acts on the area around the screws 83 securing the third piece 51c to the eighth surface portion 48b, the strength, or durability, of the housing 4 against this deforming force can be improved.

[0054] When the indoor unit 1 is fixed to the hanging bolts 90 by four hanging brackets 51 as in this embodiment, even if the balance of the weight of the indoor unit 1 acting on each hanging bracket 51 is lost and the weight is concentrated on a specific hanging bracket 51, deformation or damage of the housing 4 will not occur. In other words, even if the deformation force is concentrated on the side surface 4b (the eighth surface 48b in the illustrated example) where the first insertion port 52a is located and the specific hanging bracket 51 is inserted, deformation or damage of the housing 4 can be appropriately suppressed.

[0055] Therefore, according to the present embodiment, deformation or the like of the unit main body 2 of the indoor unit 1 will not occur, and the hanging member 51 can be fixed to the hanging bolt 90 to appropriately mount the unit main body 2 on the back surface of the ceiling.

[0056] As described above, the embodiments of the present invention and their modifications have been described. However, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the scope equivalent thereto.

Claims

1. An indoor unit of an air conditioner, comprising: A heat exchanger that exchanges heat between the air in a building interior and a refrigerant; A blower that sucks in the air in the above-mentioned interior and blows out the air heat-exchanged by the above-mentioned heat exchanger into the above-mentioned interior; and A casing that houses the above-mentioned heat exchanger and the above-mentioned blower and is fixed to a hanging bolt provided in a space separated from the above-mentioned interior by a ceiling, The above-mentioned casing has: a hanging member fixed to the above-mentioned hanging bolt; an insertion port through which the above-mentioned hanging member is inserted from the inner surface side of the above-mentioned casing so that the above-mentioned hanging member protrudes toward the outer surface side of the above-mentioned casing; and a reinforcing portion that reinforces the vicinity of the above-mentioned insertion port at at least a part of the edge of the above-mentioned insertion port.

2. The indoor unit of the air conditioner according to claim 1, wherein The above-mentioned casing is configured as a box shape in which a space surrounded by a top surface portion and side surface portions hanging down from the edges of the above-mentioned top surface portion opens toward the above-mentioned interior, Each of the above-mentioned side surface portions has the above-mentioned insertion port and the above-mentioned reinforcing portion, The above-mentioned reinforcing portion is a standing piece obtained by cutting a part of the above-mentioned side surface portion and standing it up from the above-mentioned side surface portion.

3. The indoor unit of the air conditioner according to claim 2, wherein The above-mentioned reinforcing portion is a bent piece obtained by folding back the above-mentioned standing piece so as to contact the above-mentioned side surface portion.

4. The indoor unit of the air conditioner according to claim 2 or 3, wherein The standing height of the above-mentioned standing piece from the above-mentioned side surface portion is equal to or greater than the wall thickness of the above-mentioned hanging member.

5. The indoor unit of the air conditioner according to claim 1, wherein The above-mentioned casing is configured as a box shape in which a space surrounded by a top surface portion and side surface portions hanging down from the edges of the above-mentioned top surface portion opens toward the above-mentioned interior, Each of the above-mentioned side surface portions has the above-mentioned insertion port and the above-mentioned reinforcing portion, The above-mentioned reinforcing portion is a reinforcing piece integrally mounted on the peripheral edge of the above-mentioned insertion port of the above-mentioned side surface portion.

6. The indoor unit of the air conditioner according to claim 2, wherein When viewed from the vertical direction with respect to the above-mentioned side surface portion having the above-mentioned insertion port, the opening of the above-mentioned insertion port is oval-shaped with a pair of linear edges and edges that bendably connect the two ends of these edges.

7. The indoor unit of the air conditioner according to claim 2, wherein The above-mentioned side surface portion having the above-mentioned insertion port has a recess that is continuous with a part of the edge of the above-mentioned insertion port and makes the outer surface of the above-mentioned side surface portion concave compared to other parts of the outer surface.

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