Air conditioner indoor unit

Abstract

To provide an indoor unit for an air conditioner in which gaps are unlikely to occur at the joints between the components of the divided indoor unit. [Solution] The indoor unit of an air conditioner disclosed herein includes a blower fan and a frame that is positioned behind the indoor unit relative to the blower fan and supports both ends of the blower fan. The frame includes a first frame portion and a second frame portion that is positioned to overlap a portion of the first frame portion in the up-down and front-to-rear directions. The first frame portion and the second frame portion are joined at a first portion where the first frame portion and the second frame portion overlap in the up-down direction. The first frame portion and the second frame portion are joined at a second portion where the first frame portion and the second frame portion overlap in the front-to-rear direction.

Description

[Technical Field]

[0001] The present disclosure relates to the configuration of an indoor unit of an air conditioner. [Background technology]

[0002] For example, Patent Document 1 discloses an indoor unit of an air conditioner that houses a heat exchanger, a blower fan, etc. between a front panel and a rear plate. The indoor unit of the air conditioner described in Patent Document 1 has a rear plate that is divided into left and right halves, with a blower motor mounting section integrally formed on one of the divided rear plates, and an electrical equipment storage box integrally formed on the other divided rear plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2003-287238 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the indoor unit of the air conditioner described in Patent Document 1 has a problem in that gaps occur at the joints between the components of the divided indoor unit. [Means for solving the problem]

[0005] The indoor unit of the air conditioner of the present disclosure comprises: An indoor unit of an air conditioner, A blower fan and a frame that is disposed behind the indoor unit relative to the blower fan and supports both ends of the blower fan; Equipped with The underframe is a first underframe portion; a second underframe portion disposed so as to overlap a portion of the first underframe portion in the up-down direction and the front-rear direction; Including, the first frame portion and the second frame portion are joined together at a first portion where the first frame portion and the second frame portion overlap in the up-down direction, The first and second frame portions are joined together at a second portion where the first and second frame portions overlap in the front-rear direction. [Effects of the Invention]

[0006] In view of the above-mentioned problems, the present disclosure provides an indoor unit for an air conditioner in which gaps are less likely to occur at the joints between the components of the divided indoor unit. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an exploded perspective view of an example of an indoor unit of an air conditioner according to a first embodiment of the present disclosure. [Figure 2] FIG. 1 is an exploded perspective view of an example of a frame of an indoor unit of an air conditioner according to a first embodiment of the present disclosure. [Figure 3] FIG. 10 is an exploded rear perspective view of an example of a frame of an indoor unit of an air conditioner according to a first embodiment of the present disclosure. [Figure 4] FIG. 1 is a perspective view of an example of a first frame portion and a second frame portion of an indoor unit according to a first embodiment of the present disclosure. [Figure 5] FIG. 5 is an exploded perspective view of an example of the first and second frame portions shown in FIG. 4 ; [Figure 6] 5 is a schematic cross-sectional view of the first and second underframe sections shown in FIG. 4 taken along line AA. [Figure 7] FIG. 10 is a perspective view of an example of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a second embodiment of the present disclosure. [Figure 8] FIG. 10 is a perspective view of an example of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a third embodiment of the present disclosure. [Figure 9] FIG. 10 is a perspective view of an example of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a fourth embodiment of the present disclosure. [Figure 10] FIG. 9 is a schematic cross-sectional view of the overlapping portion of the first and second frame portions shown in FIG. 8 cut in the vertical direction. [Figure 11]FIG. 10 is an enlarged exploded perspective view of an example of an indoor unit of an air conditioner according to a first modified example; [Figure 12] FIG. 10 is a rear perspective view of an example of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a second modified example; [Figure 13] 10 is a perspective view of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a third modification; [Figure 14] 10 is a perspective view of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a fourth modified example. [Figure 15] FIG. 13 is a perspective view of an example of a first frame portion and a second frame portion of an indoor unit of an air conditioner according to a fifth modified example; [Figure 16] 16 is a schematic cross-sectional view of the overlapping portion of the first frame portion and the second frame portion shown in FIG. 15 cut in the vertical direction. [Figure 17] FIG. 13 is an exploded perspective view of an example of a frame of an indoor unit of an air conditioner according to a sixth modification; [Figure 18] FIG. 13 is an exploded perspective view of an example of a frame of an indoor unit of an air conditioner according to a seventh modification; DETAILED DESCRIPTION OF THE INVENTION

[0008] (Background to this disclosure) The rear panel of the indoor unit of the air conditioner described in Patent Document 1 is divided into a right rear panel and a left rear panel, which are joined together by screws from one side in the front-to-rear direction.

[0009] However, in such an indoor unit of an air conditioner, gaps may occur at the joints between the multiple divided rear plates.

[0010] For example, when lifting or installing the indoor unit, a load may be applied to the support sections at both ends that support the blower fan, causing the center of the rear panel to sink downward, with both ends of the rear panel as fulcrums. This downward sinking of the center of the rear panel causes multiple rear panels joined at their joints to separate in the left-right direction. This creates a gap in the left-right direction at the joints of the multiple rear panels.

[0011] In addition, in air conditioners with multiple rear panels joined together, the rear panels are fastened together with screws in one direction, the front-to-rear direction, at the joints. In such a configuration, when forces are applied from two directions, the up-down direction and the front-to-rear direction, due to the load of a blower fan or the like, the screwed parts can become the axis of rotation, causing the rear panels to rotate and become twisted. This can result in gaps in the front-to-rear direction at the joints between the multiple rear panels.

[0012] These are new problems discovered by the inventors. Therefore, in order to solve the above problems, the inventors studied an indoor unit for an air conditioner in which gaps are less likely to occur at the joints between the components of the divided indoor unit, and arrived at the present disclosure.

[0013] Hereinafter, a first embodiment according to the present disclosure will be described with reference to the accompanying drawings. In each drawing, elements are exaggerated for ease of explanation.

[0014] (Embodiment 1) Fig. 1 is an exploded perspective view of an example of an indoor unit 1A of an air conditioner according to embodiment 1 of the present disclosure. The X, Y, and Z directions in the figure indicate the left-right, up-down, and front-rear directions of the indoor unit 1A, respectively. Fig. 2 is an exploded perspective view of an example of a base frame 4A of the indoor unit 1A of the air conditioner according to embodiment 1 of the present disclosure. Fig. 3 is an exploded rear perspective view of the example of a base frame 4A of the indoor unit 1A of the air conditioner according to embodiment 1 of the present disclosure.

[0015] As shown in FIG. 1, the indoor unit 1A includes a blower fan 2, an outlet grill 3, and a base frame 4A.

[0016] The blower fan 2 draws in air from a space to be air-conditioned (not shown) and supplies the conditioned air to the space to be air-conditioned (not shown). For example, the blower fan 2 can generate wind by rotating around an axis in the X direction. The blower fan 2 has a cylindrical shape. For example, the blower fan 2 is a cross-flow fan.

[0017] The outlet grille 3 guides the air. For example, the outlet grille 3 guides the supply direction of the air when the air is supplied to the air-conditioned space by the blower fan 2. For example, the outlet grille 3 determines the direction of the air to be supplied to the air-conditioned space. A part of the outlet grille 3 is located behind and below the blower fan 2 of the indoor unit.

[0018] The base frame 4A is disposed on the rear side of the indoor unit 1A relative to the blower fan 2 and the outlet grill 3. The base frame 4A supports both ends of the blower fan 2 and the outlet grill 3. The base frame 4A includes end support portions that support both ends of the blower fan 2 and the outlet grill 3. The end support portions include a first support portion 4a and a second support portion 4b. The first support portion 4a and the second support portion 4b include portions that come into contact with the blower fan 2.

[0019] As shown in Figures 1 to 3, the underframe 4A is divided into multiple parts. The underframe 4A includes a first underframe section 5A, a second underframe section 6A, and a third underframe section 7A. Portions of the first underframe section 5A, the second underframe section 6A, and the third underframe section 7A each overlap with portions of the adjacent underframe section. Portions of the first underframe section 5A, the second underframe section 6A, and the third underframe section 7A each overlap with portions of the adjacent underframe section in two directions, the up-down direction (Y direction) and the front-rear direction (Z direction).

[0020] In the front-to-rear direction (Z direction), the portions of the first underframe section 5A, the second underframe section 6A, and the third underframe section 7A that overlap with a portion of an adjacent underframe section are bent. In the XY plane, the first underframe section 5A, the second underframe section 6A, and the third underframe section 7A are each bent so that the bottom side of the indoor unit 1A is located closer to the back side of the indoor unit 1A than the top side of the indoor unit 1A. The shapes of the first underframe section 5A, the second underframe section 6A, and the third underframe section 7A in the XY plane will be described in detail below.

[0021] The first underframe portion 5A is disposed adjacent to the second underframe portion 6A and the third underframe portion 7A. A portion of the first underframe portion 5A is disposed so as to overlap a portion of the second underframe portion 6A and a portion of the third underframe portion 7A in the up-down direction (Y direction) and the front-rear direction (Z direction).

[0022] 2 and 3, the first frame portion 5A has, in the Y direction, a first upper surface 11 that faces the top surface of the indoor unit 1A, and a first lower surface 12 that is the surface opposite to a part of the first upper surface 11. In the Z direction, the first frame portion 5A has a first surface 15 that faces the blower fan 2, and a second surface opposite to the first surface 15.

[0023] The first upper surface 11 includes a first bonding upper surface 11a, a second bonding upper surface 11b, and a first top surface 11c. The first bonding upper surface 11a and the second bonding upper surface 11b are located on the end sides of the first underframe portion 5A in the X direction. The first bonding upper surface 11a is located on the end side of the first underframe portion 5A facing the second underframe portion 6A in the X direction. The second bonding upper surface 11b is located on the end side of the first underframe portion 5A facing the third underframe portion 7A in the X direction. The first top surface 11c is located higher in the Y direction than the first bonding upper surface 11a and the second bonding upper surface 11b.

[0024] The first lower surface 12 includes a first bonding lower surface 12a, a second bonding lower surface 12b, and a first back surface 12c. The first bonding lower surface 12a is the surface opposite to the first bonding upper surface 11a. The second bonding lower surface 12b is the surface opposite to the second bonding upper surface 11b. The first back surface 12c is the surface opposite to a portion of the first top surface 11c.

[0025] The second frame portion 6A has a first support portion 4a. The second frame portion 6A has the first support portion 4a on the end side opposite to the end side adjacent to the first frame portion 5A.

[0026] The second frame portion 6A has a second upper surface 13A facing the top surface of the indoor unit 1A in the Y direction, and a second lower surface 14A that is the surface opposite to a part of the second upper surface 13A. In the Z direction, the second frame portion 6A has a third surface 17 facing the blower fan 2, and a fourth surface 18 opposite the third surface 17.

[0027] The second upper surface 13A includes a third bonding upper surface 13a and a second top surface 13b. The third bonding upper surface 13a is located on the end side of the second underframe portion 6A on the first underframe portion 5A side in the X direction. The third bonding upper surface 13a is disposed so as to be in contact with the first bonding lower surface 12a of the first underframe portion 5A in the Y direction. The second top surface 13b is located higher than the third bonding upper surface 13a in the Y direction.

[0028] The second lower surface 14A includes a third bonding lower surface 14a and a second back surface 14b. The third bonding lower surface 14a is the surface opposite to the third bonding upper surface 13a. The second back surface 14b is the surface opposite to a part of the second top surface 13b.

[0029] In the Z direction, a portion of the third surface 17 of the second frame portion 6A is arranged to contact a portion of the second surface 16 of the first frame portion 5A. In the Z direction, the length in the X direction of the portion of the third surface 17 of the second frame portion 6A that overlaps with the second surface 16 of the first frame portion 5A is shorter than the length in the X direction of the portion of the third surface 17 of the second frame portion 6A that does not overlap with the second surface 16 of the first frame portion 5A.

[0030] The third frame portion 7A has a second support portion 4b. The third frame portion 7A has the second support portion 4b on the end side opposite to the end side adjacent to the first frame portion 5A side.

[0031] The third frame portion 7A has a third upper surface 13B facing the top surface of the indoor unit 1A in the Y direction, and a third lower surface 14B that is the surface opposite to a portion of the third upper surface 13B. The third frame portion 7A has a fifth surface 19 facing the blower fan 2 in the Z direction, and a sixth surface 20 opposite to the fifth surface 19.

[0032] The third upper surface 13B includes a fourth bonding upper surface 13c and a third top surface 13d. The fourth bonding upper surface 13c is located on the end side of the third underframe portion 7A on the first underframe portion 5A side in the X direction. The fourth bonding upper surface 13c is disposed so as to contact the second bonding lower surface 12b of the first underframe portion 5A in the Y direction. The third top surface 13d is located higher than the fourth bonding upper surface 13c in the Y direction.

[0033] The third lower surface 14B includes a fourth bonding lower surface 14c and a third back surface 14d. The fourth bonding lower surface 14c is the surface opposite to the fourth bonding upper surface 13c. The third back surface 14d is the surface opposite to a part of the third top surface 13d.

[0034] In the Z direction, a portion of the fifth surface 19 of the third underframe portion 7A is arranged to contact a portion of the second surface 16 of the first underframe portion 5A. In the Z direction, the length in the X direction of the portion of the fifth surface 19 of the third underframe portion 7A that overlaps with the second surface 16 of the first underframe portion 5A is shorter than the length in the X direction of the portion of the fifth surface 19 of the third underframe portion 7A that does not overlap with the second surface 16 of the first underframe portion 5A.

[0035] The following description will be given taking as an example the joining of the overlapping portion of the first underframe portion 5A and the second underframe portion 6A. The following description of the joining configuration is an example and is not limited to the joining of the overlapping portion of the first underframe portion 5A and the second underframe portion 6A. For example, the joining configuration may be used to join the first underframe portion 5A and the third underframe portion 7A. For example, the joining configuration may be used to join multiple underframe portions to elements other than the multiple underframe portions. For example, the joining configuration may be used to join multiple underframe portions to the outlet grille 3.

[0036] Fig. 4 is a perspective view of an example of a first underframe portion 5A and a second underframe portion 6A of an air conditioner indoor unit 1A according to embodiment 1 of the present disclosure. Fig. 5 is an exploded perspective view of an example of the first underframe portion 5A and the second underframe portion 6A shown in Fig. 4. Fig. 6 is a schematic cross-sectional view of the first underframe portion 5A and the second underframe portion 6A shown in Fig. 4 taken along line AA.

[0037] 4 to 6, the portion where the first frame portion 5A and the second frame portion 6A overlap in the Y direction is defined as a first portion 21. The portion where the first frame portion 5A and the second frame portion 6A overlap in the Z direction is defined as a second portion 22A.

[0038] As shown in FIG. 6, the first portion 21 is a portion where the first bonding lower surface 12a and the third bonding lower surface 14a come into contact with and overlap each other.

[0039] As shown in FIGS. 4 to 6, the second portion 22A is a portion where a part of the second surface 16 and a part of the third surface 17 come into contact with each other and overlap.

[0040] As shown in Fig. 6, the second portion 22A has an upper portion 25A, a middle portion 26A, and a lower portion 27A. The upper portion 25A, the middle portion 26A, and the lower portion 27A are integrally formed. The upper portion 25A, the middle portion 26A, and the lower portion 27A are disposed at different positions in the Y direction and the Z direction. The upper portion 25A, the middle portion 26A, and the lower portion 27A are defined based on the bending points of the first underframe portion 5A and the second underframe portion 6A, respectively.

[0041] The upper portion 25A is located closer to the blower fan 2 in the Z direction than the middle portion 26A and the lower portion 27A. The upper portion 25A is located higher in the Y direction than the middle portion 26A and the lower portion 27A. The upper portion 25A and the lower portion 27A are parallel to each other in the Z direction.

[0042] The middle portion 26A is located closer to the blower fan 2 than the lower portion 27A in the Z direction. The middle portion 26A intersects with the upper portion 25A and the lower portion 27A in the Z direction. The middle portion 26A and the upper portion 25A are connected at the upper end of the middle portion 26A and the lower end of the upper portion 25A. The middle portion 26A and the lower portion 27A are connected at the lower end of the middle portion 26A and the upper end of the lower portion 27A.

[0043] The lower portion 27A is located closer to the rear surface of the indoor unit 1A in the Z direction than the upper portion 25A and the middle portion 26A.

[0044] The first and second frame portions 5A and 6A are bent at the connection between the middle portion 26A and the upper portion 25A and at the connection between the middle portion 26A and the lower portion 27A. The connection between the middle portion 26A and the upper portion 25A and the connection between the middle portion 26A and the lower portion 27A are bent because the positions of the upper portion 25A and the lower portion 27A are different in the Y direction and the Z direction, and the middle portion 26A is connected to the upper portion 25A and the lower portion 27A.

[0045] In the first portion 21, the first underframe portion 5A has a through hole 31. The through hole 31 is a through hole that penetrates in a direction from the first joint upper surface 11a toward the first joint lower surface 12a of the first underframe portion 5A. When the through hole 31 is viewed from the direction from the first joint upper surface 11a toward the first joint lower surface 12a, the through hole 31 is provided near the center of the first joint upper surface 11a of the first underframe portion 5A.

[0046] In the first portion 21, the second frame portion 6A has a screw hole 32. For example, the screw hole 32 is a screw hole that is threaded in a direction from the third bonding upper surface 13a toward the third bonding lower surface 14a. The screw hole 32 is provided near the center of the third bonding upper surface 13a of the second frame portion 6A in the XZ plane.

[0047] The through holes 31 and the screw holes 32 are arranged at the same positions in the left-right direction (X direction) and the front-back direction (Z direction). When the first joint lower surface 12a and the third joint lower surface 14a are in contact with each other and overlap each other, the positions of the through holes 31 and the screw holes 32 overlap each other.

[0048] The first underframe portion 5A and the second underframe portion 6A are joined together in the first portion 21. The first underframe portion 5A and the second underframe portion 6A are joined together in the first portion 21 with screws 90. The first underframe portion 5A and the second underframe portion 6A are joined together in the first portion 21 with screws 90 in a direction from the first joint upper surface 11a toward the third joint lower surface 14a. The screws 90 are inserted into the through holes 31 and threaded into the screw holes 32, thereby joining the first underframe portion 5A and the second underframe portion 6A.

[0049] The screws 90 are fasteners that fasten the first frame portion 5A and the second frame portion 6A together. For example, the screws 90 are fasteners made of metal. For example, the screws 90 are screws.

[0050] As shown in FIGS. 4 to 6 , in the second portion 22A, the first underframe portion 5A has a through hole 35. The through hole 35 penetrates in a direction from the first surface 15 toward the second surface 16. The through hole 35 is disposed at a different position in the left-right direction (X direction) from the through hole 31 of the first underframe portion 5A. In other words, the through hole 35 and the through hole 31 are not aligned on a straight line on the Y axis. When the through hole 35 is viewed from the direction from the first surface 15 toward the second surface 16, the through hole 35 is provided in the lower portion 27A of the second portion 22A. For example, the through hole 35 and the screw hole 36 may be provided in a portion of the lower portion 27A relatively close to the lower end of the lower portion 27A. The lower end of the lower portion 27A is the lower end of the lower portion 27A of the second portion 22A of the underframe portion located above the lower ends of the first underframe portion 5A and the second underframe portion 6A in the lower portion 27A of the second portion 22A.

[0051] In the second portion 22A, the second frame portion 6A has a screw hole 36. For example, the screw hole 36 is a screw hole in the direction from the third surface 17 toward the fourth surface 18 of the second frame portion 6A.

[0052] The through holes 35 and the screw holes 36 are arranged at the same positions in the left-right direction (X direction) and the front-rear direction (Z direction). When the second surface 16 and the third surface 17 are in contact with each other and overlap, the positions of the through holes 35 provided in the first frame portion 5A and the positions of the screw holes 36 provided in the second frame portion 6A overlap.

[0053] The first underframe portion 5A and the second underframe portion 6A are joined together in the second portion 22A. The first underframe portion 5A and the second underframe portion 6A are joined together in the second portion 22A with screws 90. The first underframe portion 5A and the second underframe portion 6A are joined together in the second portion 22A with screws 90 in a direction from the first surface 15 of the first underframe portion 5A toward the fourth surface 18 of the second underframe portion 6A. In the second portion 22A, the screws 90 are inserted into the through holes 35 and threaded into the screw holes 36, thereby joining the first underframe portion 5A and the second underframe portion 6A.

[0054] The indoor unit 1A according to the first embodiment of the present disclosure can provide the following effects.

[0055] The indoor unit 1A of the air conditioner of this embodiment includes a blower fan 2 and an underframe 4A that is located closer to the rear of the indoor unit 1A than the blower fan 2 and supports both ends of the blower fan 2. The underframe 4A includes a first underframe portion 5A and a second underframe portion 6A that is located so as to overlap a portion of the first underframe portion 5A in the up-down direction (Y direction) and the front-to-back direction (Z direction). The first underframe portion 5A and the second underframe portion 6A are joined at a first portion 21 where they overlap in the up-down direction (Y direction). The first underframe portion 5A and the second underframe portion 6A are joined at a second portion 22A where they overlap in the front-to-back direction (Z direction).

[0056] This configuration reduces the likelihood of gaps occurring at the joints of the underframe 4A, which is a component of the divided indoor unit 1A. For example, when a load is applied to the first support portion 4a and the second support portion 4b, which support both ends of the blower fan 2 and the outlet grille 3, the center of the underframe 4A is less likely to sink downward, with both ends of the underframe 4A serving as fulcrums. In other words, the multiple underframe sections joined together are less likely to open left and right at the joints. Furthermore, by reducing the likelihood of the multiple underframe sections opening left and right at the joints, the width in the X direction of the overlapping portions of each of the multiple underframe sections with adjacent underframe sections can be reduced. Reducing the length in the left-right direction (X direction) of the overlapping portions of adjacent underframe sections reduces the size of the underframe sections, thereby reducing the manufacturing costs of the underframe sections.

[0057] By joining the joints of the multiple underframe parts from the front-to-rear and up-down directions, deformation of the underframe 4A due to forces from two directions, up-down and front-to-rear, caused by the loads of the blower fan 2 and the outlet grill 3, is suppressed. For example, by joining the joints from two directions, from the front-to-rear and up-down directions, it is possible to suppress rotation of the joints of the multiple underframe parts in the direction in which the force is applied. This suppresses twisting of the joints of the multiple underframe parts and suppresses the occurrence of gaps in the front-to-rear direction at the joints of the multiple underframe parts.

[0058] In the first portion 21, the first frame portion 5A and the second frame portion 6A are joined by screws 90.

[0059] This configuration makes it more difficult for gaps to occur at the joints of the frame 4A, which is a component of the divided indoor unit 1A. Specifically, the first frame portion 5A and the second frame portion 6A are firmly joined in the Y direction by being joined with screws 90. This makes it more difficult for gaps to occur in the first portion 21 and the second portion 22A.

[0060] In the first portion 21, the first underframe portion 5A has a through hole 31. In the first portion 21, the second underframe portion 6A has a screw hole 32. In the first portion 21, a screw 90 is inserted into the through hole 31 and threaded into the screw hole 32, thereby joining the first underframe portion 5A and the second underframe portion 6A. In the second portion 22A, the first underframe portion 5A has a through hole 35. In the second portion 22A, the second underframe portion 6A has a screw hole 36. In the second portion 22A, a screw 90 is inserted into the through hole 35 and threaded into the screw hole 36, thereby joining the first underframe portion 5A and the second underframe portion 6A. The through hole 35 and the screw hole 36 are positioned at different positions in the left-right direction (X direction) from the through hole 31 and the screw hole 36.

[0061] This configuration makes it more difficult for gaps to form at the joints of the underframes 4A, which are components of the divided indoor unit 1A. By making the joints between the first and second underframe sections 5A and 6A in the first section 21 and the joints between the first and second underframe sections 5A and 6A in the second section 22A different in the left-right direction, it is possible to further distribute the force applied to the joints. This makes it possible to suppress deformation of the first and second underframe sections 5A and 6A.

[0062] In the first embodiment, the underframe 4A is described as being disposed on the rear side of the indoor unit 1A relative to the outlet grill 3, but this is not limited to this. For example, at least a part of the underframe 4A may be disposed closer to the blower fan 2 than the outlet grill 3. For example, the first underframe portion 5A may be disposed closer to the blower fan 2 than the outlet grill 3.

[0063] Although the example in which the first joint lower surface 12a of the first frame portion 5A and the third joint upper surface 13a of the second frame portion 6A are arranged to contact each other has been described, the present invention is not limited to this. For example, the first joint upper surface 11a of the first frame portion 5A and the third joint lower surface 14a of the second frame portion 6A may be arranged to contact each other.

[0064] Although the second portion 22A is arranged so that part of the second surface 16 of the first frame portion 5A and part of the third surface 17 of the second frame portion 6A come into contact with each other, the present invention is not limited to this. For example, the second portion 22A may be arranged so that part of the first surface 15 of the first frame portion 5A and part of the fourth surface 18 of the second frame portion 6A come into contact with each other.

[0065] Although it has been described that the upper portion 25A, the middle portion 26A, and the lower portion 27A are defined based on the bending points of the first underframe portion 5A and the second underframe portion 6A, respectively, this is not limitative. For example, the upper portion 25A, the middle portion 26A, and the lower portion 27A may be defined by the length of the underframe 4A in the Y direction in the second portion 22A. For example, the upper portion 25A, the middle portion 26A, and the lower portion 27A may be defined so that the lengths of the upper portion 25A, the middle portion 26A, and the lower portion 27A in the Y direction are equal to each other.

[0066] Although the upper portion 25A, the middle portion 26A, and the lower portion 27A have been described as being arranged at different positions in the Y direction and the Z direction, this is not limitative. For example, the upper portion 25A, the middle portion 26A, and the lower portion 27A may be arranged at different positions in the Y direction and at the same positions in the Z direction.

[0067] Although an example has been described in which the connecting points between the middle portion 26A and the upper portion 25A and the connecting points between the middle portion 26A and the lower portion 27A are bent, the connecting points between the middle portion 26A and the upper portion 25A and the connecting points between the middle portion 26A and the lower portion 27A do not have to be bent.

[0068] Although the upper portion 25A and the lower portion 27A have been described as being parallel to each other in the Z direction, the upper portion 25A and the lower portion 27A do not have to be parallel to each other in the Z direction. For example, parts of the upper portion 25A and the lower portion 27A do not have to be parallel to each other in the Z direction.

[0069] It should be noted that the through holes 31 and 35 may or may not have threads.

[0070] The screw holes 32 and 36 may or may not be through holes. For example, the screw hole 32 may be a through hole.

[0071] It should be noted that the screw holes 32 and 36 may or may not have threads. For example, if the screw 90 is a self-tapping screw, the screw hole 32 may not have threads.

[0072] Although the screw 90 is a machine screw in the above example, the present invention is not limited to this. For example, the screw 90 may be a tapping screw. For example, the screw 90 may be a rivet.

[0073] Although an example has been described in which the first frame portion 5A is provided with the through-holes 31 and the second frame portion 6A is provided with the screw holes 32 in the first portion 21, the present invention is not limited to this. For example, the first frame portion 5A may be provided with the screw holes 32 and the second frame portion 6A may be provided with the through-holes 31.

[0074] It has been described that in the second portion 22A, the through holes 35 and the screw holes 36 are joined by the screws 90 in the direction from the first surface 15 to the second surface 16 or from the third surface 17 to the fourth surface 18, but this is not limiting. For example, in the second portion 22A, the through holes 31 and the screw holes 32 may be joined by the screws 90 in the direction from the second surface 16 to the first surface 15 or from the fourth surface 18 to the third surface 17.

[0075] Although it has been described that the through hole 35 and the screw hole 36 are arranged at different positions in the X direction from the through hole 31 and the screw hole 36, the through hole 35 and the screw hole 36 may be arranged at the same position in the left-right direction (X direction) as the through hole 31 and the screw hole 36. In other words, the through hole 35 and the screw hole 36 may be on a straight line in the Y direction with the through hole 31 and the screw hole 36.

[0076] Although the through-hole 35 and the screw hole 36 have been described as being provided in the lower portion 27A of the second portion 22A, this is not limitative. For example, the through-hole 35 and the screw hole 36 may be provided in the middle portion 26A of the second portion 22A.

[0077] In the second portion 22A, the first frame portion 5A and the second frame portion 6A each have one through hole 35 and one screw hole 36, but this is not limited to this. For example, in the second portion 22A, the first frame portion 5A and the second frame portion 6A each may have a plurality of through holes 35 and a plurality of screw holes 36.

[0078] In the above description, the first and second frame portions 5A and 6A are joined by screws 90 at the second portion 22A where they overlap in the front-rear direction (Z direction). However, they do not have to be joined by screws 90. For example, the first and second frame portions 5A and 6A may be bonded by applying an adhesive to the contact points of the second portion 22A, that is, the area where the second surface 16 and the fourth surface 18 overlap, and then bonding them together. In the case where the first and second frame portions 5A and 6A are not joined by screws 90 at the second portion 22A, the through holes 35 and the screw holes 36 do not have to be provided.

[0079] Although the example has been described in which the first underframe portion 5A and the second underframe portion 6A are joined by screws 90 in the first portion 21 where the first underframe portion 5A and the second underframe portion 6A overlap in the up-down direction (Y direction), they do not have to be joined by screws 90. For example, the first underframe portion 5A and the second underframe portion 6A may be bonded to each other in the first portion 21 by applying an adhesive to the contact points of the first underframe portion 5A and the second underframe portion 6A and then bonding them together. If the first underframe portion 5A and the second underframe portion 6A are not joined by screws 90 in the first portion 21, the through holes 31 and the screw holes 32 do not have to be provided.

[0080] In addition, in the second part 22A, the first frame part 5A and the second frame part 6A may be joined together by providing a through hole in the first frame part 5A and providing a protrusion in the second frame part 6B that is inserted into the through hole 35.

[0081] Although the example in which the underframe 4A includes three underframe portions, namely, the first underframe portion 5A, the second underframe portion 6A, and the third underframe portion 7A, has been described, the present invention is not limited to this. For example, the underframe 4A may include two or more underframe portions.

[0082] (Embodiment 2) An indoor unit of an air conditioner according to Embodiment 2 of the present disclosure will be described. Note that in Embodiment 2, differences from Embodiment 1 will be mainly described. In Embodiment 2, descriptions that overlap with Embodiment 1 will be omitted.

[0083] The indoor unit of the air conditioner according to embodiment 2 differs from the indoor unit of the air conditioner according to embodiment 1 in the configuration of the joint between the first and second underframe portions at a second portion where the first and second underframe portions overlap in the front-to-rear direction (Z direction). In embodiment 2, the configuration of the joint at the second portion will be described.

[0084] FIG. 7 is a perspective view of an example of a first frame portion 5B and a second frame portion 6B of an indoor unit of an air conditioner according to Embodiment 2 of the present disclosure.

[0085] As shown in FIG. 7, the first underframe portion 5B has a through hole 41 in the second portion 22B. The second underframe portion 6B has a first protrusion 42 in the second portion 22B. The through hole 41 and the first protrusion 42 are provided in the lower portion 27B of the second portion 22B. The through hole 41 and the first protrusion 42 may be provided in a portion of the second portion 22B relatively close to the lower end of the lower portion 27B. The through hole 41 and the first protrusion 42 may also be provided in the upper portion 25B or the middle portion 26B of the second portion 22B.

[0086] The through hole 41 is a through hole that penetrates in the Z direction. For example, the through hole 41 has a circular shape.

[0087] The first protrusion 42 is provided on the third surface 17. The first protrusion 42 has a convex shape in a direction from the fourth surface 18 toward the third surface 17. The first protrusion 42 has a cylindrical shape. In the XY plane, the diameter of the convex surface of the first protrusion 42 is relatively the same as the diameter of the through hole 41. For example, the diameter of the convex surface of the first protrusion 42 may be slightly larger than the diameter of the through hole 41. For example, when the diameter of the convex surface of the first protrusion 42 is slightly larger than the diameter of the through hole 41, the first protrusion 42 may be press-fit into the through hole 41.

[0088] The indoor unit according to the second embodiment of the present disclosure can provide the following effects.

[0089] The first frame portion 5B has a through hole 41 in the second portion 22B. The second frame portion 6B has a first protrusion 42 that is inserted into the through hole 41 in the second portion 22B.

[0090] This configuration reduces the likelihood of gaps occurring at the joints between the frames, which are components of the divided indoor unit. For example, by joining the first frame portion 5B and the second frame portion 6B in the first section 21 and the second section 22B, gaps are reduced at the joints between the first frame portion 5B and the second frame portion 6B. Furthermore, by joining the first frame portion 5B and the second frame portion 6B to the through-holes 41 and the first protrusions 42, it is possible to prevent the first frame portion 5B and the second frame portion 6B from expanding in the X direction.

[0091] Furthermore, in the second portion 22B, the joining of the first frame portion 5A and the second frame portion 6A does not require fasteners (for example, screws), which allows further cost reduction.

[0092] The through hole 41 and the first protrusion 42 are provided in the lower portion 27B of the second portion 22B.

[0093] By providing the through hole 41 and the first protrusion 42 in the lower portion 27B of the second portion 22B, gaps are less likely to occur in the second portion 22B than if the through hole 41 and the first protrusion 42 were provided in the upper portion 25B or middle portion 26B of the second portion 22B.

[0094] Although the example in which the through-hole 41 is circular has been described, the through-hole 41 does not have to be circular. For example, the through-hole 41 may be polygonal.

[0095] Although the first protrusion 42 has been described as having a cylindrical shape as an example, the shape is not limited to this. For example, the first protrusion 42 may have a polygonal prism shape.

[0096] Although the example has been described in which one through hole 41 and one first protrusion 42 are provided in the second portion 22B, a plurality of through holes 41 and a plurality of first protrusions 42 may be provided in the second portion 22B. For example, two through holes 41 and two first protrusions 42 may be provided in the upper portion 25B and the lower portion 27B of the second portion 22B, one each.

[0097] Although the example in which the first frame portion 5B has the through-hole 41 and the second frame portion 6B has the first protrusion 42 in the second portion 22B has been described, the present invention is not limited to this. For example, the first frame portion 5B may have the first protrusion 42 and the second frame portion 6B may have the through-hole 41.

[0098] (Embodiment 3) An indoor unit according to embodiment 3 of the present disclosure will be described. In embodiment 3, differences from embodiment 1 will be mainly described. In embodiment 3, descriptions that overlap with embodiment 1 will be omitted.

[0099] The indoor unit of the air conditioner according to embodiment 3 differs from the indoor unit of the air conditioner according to embodiment 1 in the configuration of the joint between the first and second underframe portions at the second portion where the first and second underframe portions overlap in the front-to-rear direction (Z direction). In embodiment 3, the configuration of the joint at the second portion will be described.

[0100] FIG. 8 is a perspective view of an example of a first frame portion 5C and a second frame portion 6C of an indoor unit of an air conditioner according to Embodiment 3 of the present disclosure.

[0101] As shown in FIG. 8, the first underframe portion 5C has a first cutout 51 in the second portion 22C. The first cutout 51 is provided in a central portion 26C of the second portion 22C. The first cutout 51 has a rectangular shape. The first cutout 51 is a rectangular cutout that is longer in the X direction than in the Y direction. The first cutout 51 is a through hole that opens at one end of the first underframe portion 5C adjacent to the second underframe portion 6C.

[0102] The second underframe portion 6C has a second protrusion 55 in the second portion 22C that is slidably inserted into the first cutout 51. The second protrusion 55 is provided in a middle portion 26C of the second portion 22C. The second protrusion 55 has a shape that is relatively the same as the first cutout 51. The second protrusion 55 is a quadrangular prism. When viewed from the Z direction, the second protrusion 55 has a rectangular shape that is longer in the X direction than in the Y direction. The size of the second protrusion 55 is such that it can be slidably inserted into the first cutout 51. The second protrusion 55 protrudes in the direction from the fourth surface 18 toward the third surface 17. For example, the length of the second protrusion 55 in the Z direction is at least one time and at most two times the length of the first cutout 51 in the Z direction (the thickness of the first cutout 51).

[0103] The indoor unit according to the third embodiment of the present disclosure can provide the following effects.

[0104] The first frame portion 5D has a first cutout 51 in the second portion 22C. The second frame portion 6D has a second protrusion 55 that is slidably inserted into the first cutout 51 in the second portion 22C.

[0105] This configuration makes it less likely that gaps will form at the joints between the frames that are components of the divided indoor unit. Also, in the second part 22C, the second protrusion 55 is slid and inserted into the first cutout 51, making assembly relatively easy.

[0106] Although the example in which the first notch 51 and the second protrusion 55 are provided in the middle part 26C of the second part 22C has been described, the present invention is not limited to this. For example, the first notch 51 and the second protrusion 55 may be provided in the upper part 25C or the lower part 27C of the second part 22C.

[0107] Although an example has been described in which the first underframe portion 5C has the first cutout 51 and the second underframe portion has the second protrusion 55, the present invention is not limited to this. For example, the second underframe portion 6C may have the first cutout 51 in the second portion 22C. For example, the first underframe portion 5C may have the second protrusion 55 in the second portion 22C that is slidably inserted into the first cutout 51 provided in the second underframe portion 6C.

[0108] Although the first cutout 51 has been described as having a rectangular shape, it does not have to be rectangular. For example, the first cutout 51 may have a shape that is inclined toward one end and whose length in the Y direction decreases toward the second frame portion 6A. For example, when the length of the first cutout 51 in the Y direction decreases toward the second frame portion 6A, the second protrusion 55 has a shape and size that allows it to be press-fitted into the first cutout 51.

[0109] Although the example in which the first underframe portion 5C has one first cutout 51 and the second underframe portion 6C has one second protrusion 55 has been described, the present invention is not limited to this. For example, the first underframe portion 5C may have a plurality of first cutouts 51. For example, the second underframe portion 6C may have a plurality of second protrusions 55. For example, the first underframe portion 5C may have one second protrusion 55 and the second underframe portion 6C may have one first cutout 51. For example, when the first underframe portion 5C has the second protrusion 55, the second protrusion 55 may protrude in a direction from the first surface 15 to the second surface 16.

[0110] (Fourth embodiment) An indoor unit according to embodiment 4 of the present disclosure will be described. In embodiment 4, differences from embodiment 1 will be mainly described. In embodiment 4, descriptions that overlap with embodiment 1 will be omitted.

[0111] The indoor unit of the air conditioner according to embodiment 4 differs from the indoor unit of the air conditioner according to embodiment 1 in the configuration of the joint between the first and second underframe parts at the second part where the first and second underframe parts overlap in the front-to-rear direction (Z direction). In embodiment 2, the configuration of the joint at the second part will be described.

[0112] Fig. 9 is a perspective view of an example of a first underframe portion 5D and a second underframe portion 6D of an indoor unit of an air conditioner according to Embodiment 4 of the present disclosure. Fig. 10 is a schematic cross-sectional view taken in the vertical direction (Y direction) of the overlapping portion of the first underframe portion 5D and the second underframe portion 6D shown in Fig. 9.

[0113] 9 and 10, the first frame portion 5D includes a first joint portion 60A in the second portion 22D, and the second frame portion 6D includes a second joint portion 70A in the second portion 22D.

[0114] The first bonding portion 60A and the second bonding portion 70A are portions that are bonded to each other in the second portion 22D.

[0115] The first joint portion 60A and the second joint portion 70A form a middle portion 26D. The upper portion 25D is located higher in the Y direction than the middle portion 26D. The lower portion 27D is located lower in the Y direction than the middle portion 26D.

[0116] The first bonding portion 60A includes a first bonding surface 61A and a third notch 65.

[0117] The first joint surface 61A is a surface that comes into contact with the second joint portion 70A, and is a surface that is recessed in the direction from the first surface 15 to the second surface 16. The first joint surface 61A is a surface that faces the blower fan 2 and is recessed in the direction from the first surface 15 to the second surface 16.

[0118] The third cutout 65 is a cutout provided in an upper portion of the first joint portion 60A. The third cutout 65 has a rectangular shape when viewed from the Z direction. The third cutout 65 is a rectangular cutout that is longer in the X direction than in the Y direction.

[0119] The second joint portion 70A is slidably inserted into the third cutout 65 of the first joint portion 60A in the second section 22D. The second joint portion 70A has a bent shape when viewed from the direction in which it slides into the third cutout 65 of the first joint portion 60A. Specifically, the second joint portion 70A has a bent shape like an inverted L when viewed from the direction in which it slides into the third cutout 65 of the first joint portion 60A.

[0120] The second joint portion 70A includes a second joint surface 71A and a first bent portion 75.

[0121] The second bonding surface 71A is a surface that comes into contact with the first bonding surface 61A of the first bonding portion 60A, and is a surface that is recessed in the direction from the fourth surface 18 toward the third surface 17. The second bonding surface 71A is a surface that faces the rear side of the indoor unit, recessed in the direction from the fourth surface 18 toward the third surface 17.

[0122] The first bent portion 75 is a portion that is bent in an inverted L shape at the second joint portion 70A. The first bent portion 75 is provided in the upper portion of the second joint portion 70A. The first bent portion 75 is formed by a portion that is parallel to the second joint surface 71A and a portion that is bent at a predetermined angle from the portion that is parallel to the second joint surface 71A. The first bent portion 75 is bent, for example, at an angle between 85 degrees and 105 degrees.

[0123] The first bent portion 75 of the second joint portion 70A is slidably inserted into the third notch 65 of the first joint portion 60A. When the second joint portion 70A is slidably inserted into the third notch 65 of the first joint portion 60A, the first joint surface 61A of the first underframe portion 5D and the second joint surface 71A of the second underframe portion 6D come into contact. This joins the first underframe portion 5D and the second underframe portion 6D.

[0124] The indoor unit according to the fourth embodiment of the present disclosure can provide the following effects.

[0125] The first underframe portion 5D includes a first joint portion 60A in the second portion 22D. The first joint portion 60A has a first joint surface 61A recessed in the direction from the first surface 15 to the second surface 16, and a third notch 65. The second underframe portion 6D includes a second joint portion 70A in the second portion 22D, which includes a second joint surface 71A recessed in the direction from the fourth surface 18 to the third surface 17. The second joint portion 70A is slidably inserted into the third notch 65 of the first joint portion 60A in the second portion 22D. The first joint surface 61A and the second joint surface 71A come into contact with each other in the second portion 22D.

[0126] This configuration reduces the likelihood of gaps occurring at the joints of the underframes, which are components of the divided indoor unit. For example, by sliding and inserting the third notch 65 of the first joint portion 60A into the second joint portion 70A, the first underframe portion 5D and the second underframe portion 6D are joined at the second portion 22D, suppressing deformation of the underframe in the front-to-rear direction (Z direction). For example, the first joint portion 60A and the second joint portion 70A come into contact with each other, suppressing deformation of the underframe.

[0127] The second joint portion 70A has an inverted L-shape in the second portion 22D when viewed from the direction in which the second joint portion 70A slides into the third cutout 65 of the first joint portion 60A.

[0128] The second joint portion 70A has an inverted L-shape in the second portion 22D when viewed from the direction in which it slides into the third notch 65 of the first joint portion 60A, thereby suppressing deformation of the underframe in the Y and Z directions. For example, when a force that deforms the underframe in the Y direction is applied, a part of the third notch 65 of the first underframe portion 5D comes into contact with a part of the first bent portion 75 of the second joint portion 70A of the second underframe portion 6D, thereby suppressing deformation of the underframe in the Y direction. For example, when a force that deforms the underframe in the Z direction is applied, contact between the first joint surface 61A and the second joint surface 71A in the middle portion 26D and contact between the second surface 16 and the third surface 17 in the upper portion 25D and the lower portion 27D suppresses deformation of the underframe in the Z direction.

[0129] Although the third notch 65 is provided in the upper portion of the first joint portion 60A in the example described above, the present invention is not limited to this. For example, the third notch 65 may be provided in the lower portion of the first joint portion 60A. In this case, the first bent portion 75 of the second joint portion 70A may be provided in the lower portion of the second joint portion 70A.

[0130] Although the second joint portion 70A has been described as having an inverted L-shape in the second section 22D when viewed from the direction in which the second joint portion 70A slides into the third notch 65 of the first joint portion 60A, this is not limitative. For example, the second joint portion 70A does not have to have an inverted L-shape when viewed from the direction in which the second joint portion 70A slides into the third notch 65 of the first joint portion 60A.

[0131] <Variation 1> FIG. 11 is an enlarged exploded perspective view of an example of an indoor unit 1A of an air conditioner according to the first modification.

[0132] As shown in FIG. 11, the first frame portion 5A, the second frame portion 6A, and the air outlet grill 3 that guides air are joined together in the second portion 22A.

[0133] The first frame portion 5A is disposed so that a portion of the second surface 16 of the first frame portion 5A comes into contact with a portion of the surface of the outlet grill 3 that faces the blower fan 2. At a lower portion 27A of the second portion 22A, the first frame portion 5A and a portion of the outlet grill 3 come into contact with each other.

[0134] The second frame portion 6A is arranged so that a part of the third surface 17 of the second frame portion 6A comes into contact with a part of the surface of the outlet grille 3 that faces the rear side of the indoor unit 1A. At a lower portion 27A of the second part 22A, the second frame portion 6A and a part of the outlet grille 3 come into contact with each other.

[0135] The outlet grill 3 has a through hole 38. The through hole 38 is a through hole that penetrates in the Z direction.

[0136] In the second part 22A, the screw 90 is inserted into the through hole 35 of the first frame part 5A and the through hole 38 of the outlet grill 3 and then threaded into the screw hole 36, thereby joining the first frame part 5A, the second frame part 6A, and the outlet grill 3.

[0137] The indoor unit of Modification 1 can provide the following effects.

[0138] In the second portion 22A, the first frame portion 5A, the second frame portion 6A, and the air outlet grill 3 that guides air are joined together.

[0139] This configuration makes it possible to reduce the likelihood of a gap occurring between the outlet grille 3 and the underframe 4A. Furthermore, by joining the outlet grille 3, the first underframe portion 5A, and the second underframe portion 6A, the fixing strength can be further increased.

[0140] It should be noted that the through-hole 38 may be either non-threaded or threaded.

[0141] Although the example has been described in which part of the outlet grille 3 is arranged so as to contact part of the second surface 16 of the first underframe portion 5A and part of the third surface 17 of the second underframe portion 6A, the present invention is not limited to this. For example, the outlet grille 3 may be arranged so as to contact part of the first surface 15 of the first underframe portion 5A and part of the fourth surface 18 of the second underframe portion 6A.

[0142] <Variation 2> The first and second frame portions of the indoor unit of the air conditioner of Modification 2 are modifications of the first and second frame portions 5B and 6B of the air conditioner of Embodiment 2.

[0143] FIG. 12 is a rear perspective view of a first frame portion 5E and a second frame portion 6E of an indoor unit of an air conditioner according to the second modification.

[0144] As shown in FIG. 12, the first frame portion 5E and the second frame portion 6E are disposed so that a portion of the second surface 16 thereof comes into contact with a portion of the third surface thereof.

[0145] In the second portion 22E, the second surface 16 of the first frame portion 5E and the third surface 17 of the second frame portion 6E are joined so as to come into contact with each other.

[0146] In the second portion 22E, the first underframe portion 5E has a first protrusion 42. The first protrusion 42 is provided on a lower portion 27E of the first underframe portion 5E. The first protrusion 42 of the first underframe portion 5E is provided on the second surface 16 of the first underframe portion 5E. The first protrusion 42 of the first underframe portion 5E has a shape that protrudes in a direction from the first surface 15 toward the second surface 16.

[0147] In the second portion 22E, the second frame portion 6E has a through-hole 41. The through-hole 41 is provided in a lower portion 27E of the second frame portion 6E.

[0148] The indoor unit of Modification 2 can provide the following effects.

[0149] The second frame portion 6E has a through hole 41 in the second portion 22E. The first frame portion 5E has a first protrusion 42 that is inserted into the through hole 41 in the second portion 22E.

[0150] This configuration reduces the likelihood of gaps occurring at the joints between the frames that make up the divided indoor unit. Furthermore, in the second section 22E, no fixing tools are required to join the first frame section 5E and the second frame section 6E, thereby reducing costs.

[0151] The second portion 22E may be provided with a plurality of through holes 41 and a plurality of first protrusions 42 that are press-fitted into the plurality of through holes 41, respectively.

[0152] In the second part 22E, the first frame portion 5E may have a through hole 41 and a first protrusion 42, and the second frame portion 6E may have a first protrusion 42 and a through hole 41 that are respectively pressed into the through hole 41 and the first protrusion 42 provided in the first frame portion 5E.

[0153] <Variation 3> The first and second frame portions of the indoor unit of the air conditioner of Modification 3 are modifications of the first and second frame portions 5C and 6C of the indoor unit of the air conditioner of Embodiment 3.

[0154] FIG. 13 is a perspective view of a first frame portion 5F and a second frame portion 6F of an indoor unit of an air conditioner according to the third modification.

[0155] As shown in FIG. 13 , the first underframe portion 5F has a plurality of cutouts in the second portion 22F. The plurality of cutouts include a first cutout 51 and a second cutout 52. The first cutout 51 and the second cutout 52 are provided in a central portion 26F of the second portion 22F. In the second portion 22F, the second cutout 52 is provided at a different position in the Y direction from the first cutout 51. For example, the second cutout 52 is provided above the first cutout 51. The first cutout 51 and the second cutout 52 are each a through hole that opens at one end of the first underframe portion 5F adjacent to the second underframe portion 6F. The first cutout 51 and the second cutout 52 have relatively the same shape and relatively the same size.

[0156] The second frame portion 6F has, in the second section 22F, a plurality of protrusions that are each slidably inserted into a plurality of cutouts of the first frame portion 5F. The plurality of protrusions include a second protrusion 55 and a third protrusion 56. The second protrusion 55 is slidably inserted into the first cutout 51. The third protrusion 56 is slidably inserted into the second cutout 52. The second protrusion 55 and the third protrusion 56 have shapes and sizes that allow them to be slidably inserted into the first cutout 51 and the second cutout 52, respectively. The second protrusion 55 and the third protrusion 56 have relatively the same shape and relatively the same size.

[0157] The indoor unit of Modification 3 can provide the following effects.

[0158] The first frame portion 5F has a plurality of notches in the second portion 22F, and the second frame portion 6F has a plurality of protrusions in the second portion 22F that are slidably inserted into the plurality of notches.

[0159] This configuration makes it less likely that gaps will occur at the joints between the frames that are components of the divided indoor unit. In the second part 22F, the first frame part 5F and the second frame part 6F are joined by multiple notches and multiple protrusions, which makes it less likely that gaps will occur than if they were joined by a single notch and a single protrusion.

[0160] Although the first notch 51 and the second notch 52 have been described as being provided in the middle portion 26F of the second portion 22F, this is not limiting. For example, the first notch 51 may be provided in the upper portion 25F, and the second notch 52 may be provided in the lower portion 27F. For example, when the first notch 51 is provided in the upper portion 25F and the second notch 52 is provided in the lower portion 27F, the second protrusion 55 may be provided in the upper portion 25F, and the third protrusion 56 may be provided in the lower portion 27F.

[0161] Although the first cutout 51 and the second cutout 52 have been described as having relatively the same shape and size, the first cutout 51 and the second cutout 52 may have different shapes and sizes. For example, the first cutout 51 may be larger or smaller than the second cutout 52.

[0162] Although the second protrusion 55 and the third protrusion 56 have been described as having relatively the same shape and size, they may have different shapes and sizes. For example, the second protrusion 55 may be larger or smaller than the third protrusion 56.

[0163] <Variation 4> The first and second frame portions of the indoor unit of the air conditioner of Modification 4 are modifications of the first and second frame portions 5C and 6C of the indoor unit of the air conditioner of Embodiment 3.

[0164] FIG. 14 is a perspective view of a first frame portion 5G and a second frame portion 6G of an indoor unit of an air conditioner according to the fourth modification.

[0165] As shown in FIG. 14, the first underframe portion 5G has a first cutout 51 and a third protrusion 56 in the second portion 22G. The first cutout 51 and the third protrusion 56 are provided in a central portion 26G of the second portion 22G. In the central portion 26G of the second portion 22G, the first cutout 51 is provided below the third protrusion 56. In the second portion 22F, the first cutout 51 is open at one end of the first underframe portion 5G adjacent to the second underframe portion 6G. The third protrusion 56 protrudes in the direction from the first surface 15 to the second surface 16.

[0166] The second underframe portion 6G has a second cutout 52 and a second protrusion 55 in the second portion 22G. The second cutout 52 and the second protrusion 55 are provided in a middle portion 26G of the second portion 22G. In the second portion 22F, the second cutout 52 is provided above the second protrusion 55. The second cutout 52 is a through hole that opens at one end of the second underframe portion 6G adjacent to the first underframe portion 5G. In the second portion 22G, the second cutout 52 is provided at a different position in the Y direction from the first cutout 51.

[0167] In the second portion 22G, the third protrusion 56 of the first underframe portion 5G is slidably inserted into the second cutout 52 of the second underframe portion 6G. In the second portion 22G, the second protrusion 55 of the second underframe portion 6G is slidably inserted into the first cutout 51 of the first underframe portion 5G. The second protrusion 55 protrudes in the direction from the fourth surface 18 toward the third surface.

[0168] The indoor unit of the fourth modification can provide the following effects.

[0169] The first underframe portion 5G has a first cutout 51 and a third protrusion 56 in the second portion 22G. The second underframe portion 6G has a second cutout 52 and a second protrusion 55 in the second portion 22G. The third protrusion 56 is slidably inserted into the second cutout 52. In the second portion 22G, the second cutout 52 is provided at a different position in the up-down direction (Y direction) from the first cutout 51.

[0170] This configuration makes it less likely that gaps will occur at the joints of the underframes, which are components of the divided indoor unit. For example, the first cutout 51 and the third protrusion 56 of the first underframe portion 5G receive different forces from the second cutout 52 and the second protrusion 55 of the second underframe portion 6G. As a result, the first cutout 51 and the third protrusion 56 of the first underframe portion 5G are less likely to receive the same force from the same direction, which makes it possible to suppress deformation of the first underframe portion 5G.

[0171] <Variation 5> The first and second frame portions of the indoor unit of the air conditioner of Modified Example 5 are modified versions of the first and second frame portions 5D and 6D of the indoor unit of the air conditioner of Embodiment 4. The indoor unit of the air conditioner of Modified Example 5 differs from the indoor unit of the air conditioner of Embodiment 4 in that, in the second part, the first joint portion has two cutouts, and the second joint portion is slidably inserted into the two cutouts.

[0172] Fig. 15 is a perspective view of an example of a first frame portion 5H and a second frame portion 6H of an indoor unit of an air conditioner according to Modification 5. Fig. 16 is a schematic cross-sectional view taken in the vertical direction of the portion where the first frame portion 5H and the second frame portion 6H shown in Fig. 15 overlap each other.

[0173] As shown in FIGS. 15 and 16, the first joint portion 60B of the first underframe portion 5H has a first joint surface 61B, a third notch 65, and a fourth notch 67.

[0174] The fourth notch 67 is provided at a different position in the up-down direction (Y direction) from the third notch 65. The fourth notch 67 is provided at a lower position than the third notch 65. The fourth notch 67 is a notch provided in the lower part of the first joint portion 60B. The fourth notch 67 is a rectangular notch that is longer in the X direction than in the Y direction. The lengths of the third notch 65 and the fourth notch 67 in the X direction are relatively the same. The lengths of the third notch 65 and the fourth notch 67 in the Y direction are different. The length of the third notch 65 in the Y direction is shorter than the length of the fourth notch 67 in the Y direction.

[0175] In the second part 22D, the second joint portion 70A is slidably inserted into the third notch 65 and the fourth notch 67 of the first joint portion 60A. When viewed from the direction in which the second joint portion 70A slides into the third notch 65 and the fourth notch 67 of the first joint portion 60A, the second joint portion 70A has a concavely bent shape recessed in the direction from the fourth surface 18 toward the third surface 17.

[0176] The second joint portion 70B of the second underframe portion 5H includes a second joint surface 71B, a first bent portion 75, and a second bent portion 77.

[0177] The second bent portion 77 is an L-shaped bent portion of the second underframe portion 6H. The second bent portion 77 is provided in a lower portion of the second joint portion 70B. The second bent portion 77 is formed by a portion parallel to the second joint surface 71B and a portion bent at a predetermined angle from the portion parallel to the second joint surface 71B. The second bent portion 77 is bent, for example, at an angle of 85 degrees or more and 105 degrees or less.

[0178] The first bent portion 75 and the second bent portion 77 of the second joint portion 70B are slidably inserted into the third notch 65 and the fourth notch 67 of the first joint portion 60B in the second part 22H.

[0179] The indoor unit of the fifth modification can provide the following effects.

[0180] The first joint portion 60B has a first joint surface 61B, a third notch 65, and a fourth notch 67 provided at a different position in the up-down direction (Y direction) from the third notch 65. The second joint portion 70B is slidably inserted into the third notch 65 and the fourth notch 67 of the first joint portion 60B in the second part 22H.

[0181] This configuration makes it difficult for gaps to occur at the joints between the frames that are components of the divided indoor unit. For example, the third notch 65 and the fourth notch 67 of the first joint portion 60B can prevent gaps from occurring in the up-down direction (Y direction) at the joints between the first frame portion 5H and the second frame portion 6H in the second section 22H.

[0182] In the second part 22H, the second joint 70B has a concave shape that is recessed in the direction from the fourth surface 18 toward the third surface 17 when viewed from the direction in which the second joint 70B slides into the third notch 65 and the fourth notch 67 of the first joint 60B.

[0183] The second joint portion 70B has a concave shape in the second portion 22H when viewed from the direction in which it slides into the third notch 65 and the fourth notch 67 of the first joint portion 60B, thereby suppressing deformation of the underframe in the Y direction and the Z direction. For example, when a force that deforms the underframe in the Y direction is applied, deformation of the underframe in the Y direction is suppressed by contact between a portion of the third notch 65 and a portion of the first bent portion 75 or by contact between a portion of the fourth notch 67 and a portion of the second bent portion 77. For example, when a force that deforms the underframe in the Z direction is applied, deformation of the underframe in the Z direction is suppressed by contact between the first joint surface 61B and the second joint surface 71B in the middle portion 26H and contact between the second surface 16 and the third surface 17 in the upper portion 25H and the lower portion 27H.

[0184] Although it has been described that the third notch 65 and the fourth notch 67 have relatively the same length in the X direction, the third notch 65 and the fourth notch 67 may have different lengths in the X direction.

[0185] Although the third cutout 65 and the fourth cutout 67 have been described as having different lengths in the Y direction, the third cutout 65 and the fourth cutout 67 may have relatively the same length in the Y direction.

[0186] Although it has been explained that the length of the third notch 65 in the Y direction is smaller than the length of the fourth notch 67 in the Y direction, the length of the third notch 65 in the Y direction may be larger than the length of the fourth notch 67 in the Y direction.

[0187] <Variation 6> The frame of the indoor unit of the air conditioner of Modification 6 differs from the frame 4A of the indoor unit 1A of Embodiment 1 in that it is divided into left and right parts (X direction) so that the number of frame parts is an even number.

[0188] FIG. 17 is an exploded perspective view of an example of a base frame 4B of an indoor unit of an air conditioner according to the sixth modification.

[0189] As shown in FIG. 17, the underframe 4B is divided into an even number of parts in the left-right direction (X direction). The underframe 4B is divided into two parts in the left-right direction (X direction). The underframe 4B has a set including an even number of underframe parts. A set of an even number of underframe parts includes a first underframe part 6I and a second underframe part 7I. In other words, the underframe 4B has a set including a first underframe part 6I and a second underframe part 7I.

[0190] The length L1 of the first frame portion 6I in the X direction and the length L2 of the second frame portion 7I in the X direction are relatively the same.

[0191] The first underframe portion 6I is disposed so as to overlap at least a portion of the second underframe portion 7I in the Y and Z directions. The overlapping portions of adjacent underframe portions are joined. For example, the overlapping portions of the first underframe portion 6I and the second underframe portion 7I are joined. The overlapping portions of adjacent underframe portions are joined using the joining method described above.

[0192] The indoor unit of Modification 6 can provide the following effects.

[0193] The underframe 4B has a set including a first underframe portion 6I and a second underframe portion 7I.

[0194] With this configuration, the underframe can be divided to include an even number of underframe sections. For example, the number of underframe sections included in the underframe can be determined depending on the size of the underframe. For example, when the length of the underframe is short in the left-right direction (X direction), the underframe may be divided into two sections. For example, in the case of underframe 4B, which includes a first underframe section 6I and a second underframe section 7I, the joints between the underframe sections that are components of underframe 4B are the portions where the first underframe section 6I and the second underframe section 7I overlap. Therefore, underframe 4B can require fewer man-hours for joining than underframe 4A, which includes three underframe sections.

[0195] In the underframe 4B, the length L1 in the X direction of the first underframe portion 6I and the length L2 in the X direction of the second underframe portion 7I have been described as being relatively the same, but this is not limited to this. For example, in the underframe 4B, the length L1 in the X direction of the first underframe portion 6I and the length L2 in the X direction of the second underframe portion 7I may be different lengths. For example, the length L1 in the X direction of the first underframe portion 6I may be greater or smaller than the length L2 in the X direction of the second underframe portion 7I.

[0196] <Variation 7> The frame of the indoor unit of the air conditioner of Modification 7 differs from the frame 4A of the indoor unit 1A of Embodiment 1 in that it has a plurality of sets including a first frame portion and a second frame portion.

[0197] FIG. 18 is an exploded perspective view of an example of a base frame 4C of an indoor unit of an air conditioner according to the sixth modification.

[0198] As shown in FIG. 18, the underframe 4C is divided into an even number of parts in the left-right direction (X direction). The underframe 4C is divided into four parts in the left-right direction (X direction). The underframe 4C has a plurality of sets including an even number of underframe sections. A set including an even number of underframe sections is a set including a first underframe section 5i and a second underframe section 5j. In other words, the underframe 4C has a plurality of sets including the first underframe section 5i and the second underframe section 5j. The underframe 4C has two sets including the first underframe section 5i and the second underframe section 5j. Therefore, the underframe 4C includes the first underframe section 5i, the second underframe section 5j, the third underframe section 6i, and the fourth underframe section 7i.

[0199] The length L3 in the X direction of the first frame portion 5i and the length L4 in the X direction of the second frame portion 5j are relatively the same. The length L5 in the X direction of the third frame portion 6i and the length L6 in the X direction of the fourth frame portion 7i are relatively the same. The length L3 in the X direction of the first frame portion 5i and the length L4 in the X direction of the second frame portion 5j are greater than the length L5 in the X direction of the third frame portion 6i and the length L6 in the X direction of the fourth frame portion 7i.

[0200] The first underframe portion 5i is disposed so as to overlap at least a portion of the second underframe portion 5j and the fourth underframe portion 7i in the Y and Z directions. The second underframe portion 5j is disposed so as to overlap at least a portion of the first underframe portion 5i and the third underframe portion 6i in the Y and Z directions. The overlapping portions of adjacent underframe portions are joined. For example, the overlapping portions of the first underframe portion 5i and the second underframe portion 5j and the fourth underframe portion 7i are joined. For example, the overlapping portions of the second underframe portion 5j and the first underframe portion 5i and the third underframe portion 6i are joined. The overlapping portions of adjacent underframe portions are joined using the joining method described above.

[0201] The indoor unit of the seventh modification can provide the following effects.

[0202] The underframe 4C has a plurality of sets including a first underframe portion 5i and a second underframe portion 5j.

[0203] With this configuration, the underframe can be divided to include an even number of underframe sections. For example, the number of underframe sections included in the underframe can be determined based on the size of the underframe. For example, if the length of the underframe is large in the left-right direction (X direction), the underframe may be divided into four or more sections. The more the underframe is divided, the smaller the size of each underframe section becomes. By reducing the size of the underframe sections, the manufacturing cost of the underframe sections can be reduced.

[0204] Although the underframe 4C has been described as having two sets including the first underframe portion 5i and the second underframe portion 5j, this is not limitative. For example, the underframe 4C may have two or more sets including the first underframe portion 5i and the second underframe portion 5j. In other words, the underframe 4C may include four or more underframe portions.

[0205] In the underframe 4C, the length L3 in the X direction of the first underframe portion 5i and the length L4 in the X direction of the second underframe portion 5j have been described as being relatively the same, but this is not limited to this. For example, in the underframe 4C, the length L3 in the X direction of the first underframe portion 5i and the length L4 in the X direction of the second underframe portion 5j may be different lengths. For example, the length L3 in the X direction of the first underframe portion 5i may be greater or smaller than the length L4 in the X direction of the second underframe portion 5j.

[0206] In the underframe 4C, the length L5 in the X direction of the third underframe portion 6i and the length L6 in the X direction of the fourth underframe portion 7i have been described as being relatively the same length, but this is not limited to this. For example, in the underframe 4C, the length L5 in the X direction of the third underframe portion 6i and the length L6 in the X direction of the fourth underframe portion 7i may be different lengths. For example, the length L5 in the X direction of the third underframe portion 6i may be greater or smaller than the length L6 in the X direction of the fourth underframe portion 7i.

[0207] In the underframe 4C, the length L3 in the X direction of the first underframe portion 5i and the length L4 in the X direction of the second underframe portion 5j are described as being greater than the length L5 in the X direction of the third underframe portion 6i and the length L6 in the X direction of the fourth underframe portion 7i. However, this is not limited to this. For example, the length L3 in the X direction of the first underframe portion 5i and the length L4 in the X direction of the second underframe portion 5j may be relatively equal to the length L5 in the X direction of the third underframe portion 6i and the length L6 in the X direction of the fourth underframe portion 7i. For example, the length L3 in the X direction of the first underframe portion 5i and the length L4 in the X direction of the second underframe portion 5j may be smaller than the length L5 in the X direction of the third underframe portion 6i and the length L6 in the X direction of the fourth underframe portion 7i.

[0208] As used herein, terms such as "first," "second," etc. are used for descriptive purposes only and should not be understood as expressing or implying the relative importance or ranking of technical features. Features qualified as "first" and "second" expressly or imply the inclusion of one or more of that feature.

[0209] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart therefrom.

[0210] (Outline of the embodiment) (1) An indoor unit of an air conditioner disclosed herein includes an air conditioner indoor unit including a blower fan and a frame that is positioned behind the indoor unit relative to the blower fan and supports both ends of the blower fan. The frame includes a first frame portion and a second frame portion that is positioned overlapping a portion of the first frame portion in the up-down and front-to-rear directions. The first frame portion and the second frame portion are joined at a first portion where the first frame portion and the second frame portion overlap in the up-down direction. The first frame portion and the second frame portion are joined at a second portion where the first frame portion and the second frame portion overlap in the front-to-rear direction.

[0211] (2) In the indoor unit of the air conditioner described in (1), the first frame portion and the second frame portion may be joined together by screws in the first portion.

[0212] (3) In the indoor unit of the air conditioner described in (1) or (2), the first frame portion, the second frame portion, and an air outlet grille that guides air may be joined together in the second portion.

[0213] (4) In the indoor unit of the air conditioner described in any one of (1) to (3), the first frame portion may have a through-hole in the second portion, and the second frame portion may have a first protrusion in the second portion that is inserted into the through-hole.

[0214] (5) In the indoor unit of the air conditioner described in (4), the through-hole and the first protrusion may be provided in a lower part of the second portion.

[0215] (6) In the indoor unit of the air conditioner described in any one of (1) to (3), the first frame portion may have a first cutout in the second portion. The second frame portion may have a second protrusion in the second portion that is slidably inserted into the first cutout.

[0216] (7) In the indoor unit of the air conditioner described in any one of (1) to (3) or (6), the first frame portion may have a plurality of notches in the second portion. The second frame portion may have a plurality of second protrusions in the second portion that are slidably inserted into the plurality of notches.

[0217] (8) In the indoor unit of the air conditioner described in (6), the first frame portion may further have a third protrusion in the second portion. The second frame portion may further have a second cutout in the second portion into which the third protrusion is slidably inserted. The second cutout may be provided at a different position in the up-down direction from the first cutout.

[0218] (9) In the indoor unit of an air conditioner described in any one of (1) to (3) or (6) to (8), the first frame section may have a first surface facing the blower fan and a second surface opposite the first surface. The first frame section may include a first joint section in a second section, the first joint section including a first joint surface recessed in a direction from the first surface to the second surface and a third notch. The second frame section may have a third surface facing the blower fan and a fourth surface opposite the third surface. The second frame section may include a second joint section in the second section, the second joint section including a second joint surface recessed in a direction from the fourth surface to the third surface. The second joint section may be slidably inserted into the third notch of the first joint section in the second section. The first joint surface and the second joint surface may be in contact with each other.

[0219] (10) In the indoor unit of the air conditioner described in (9), the second joint may have an inverted L-shape in the second part when viewed from the direction in which the second joint slides into the third notch of the first joint.

[0220] (11) In the indoor unit of the air conditioner described in (9), the first joint portion may further have a fourth notch provided at a different position in the vertical direction from the third notch. The second joint portion may be slidably inserted into the third notch and the fourth notch of the first joint portion in the second part.

[0221] (12) In the indoor unit of the air conditioner described in (11), the second joint may have a concave shape in the second part that is recessed in a direction from the fourth surface toward the third surface when viewed from the direction in which the second joint slides into the third notch and the fourth notch of the first joint.

[0222] (13) In the indoor unit of the air conditioner described in any one of (1) to (12), the frame may include a plurality of sets, each including a first frame portion and a second frame portion. [Industrial Applicability]

[0223] The present disclosure is useful for joining components of a divided indoor unit of an air conditioner. [Explanation of symbols]

[0224] 1A indoor unit 2. Blower fan 3. Blowout grill 4A, 4B, 4C underframes 4a, 4b Support part 5A~5H, 5i, 5j, 6A~6H, 6I, 6i, 7A, 7I, 7i Underframe 11, 13A, 13B top surface 11a, 11b, 13a, 13c Joint top surface 11c, 13b, 13d top 12, 14A, 14B bottom side 12a, 12b, 14a, 14c Bottom surface of joint 12c, 14b, 14d back side 15~20 sides 21 Part 1 22A~22H 2nd part 25A, 25B, 25C, 25D, 25F, 25H Upper 26A, 26B, 26C, 26D, 26F, 26G, 26H Central 27A, 27B, 27C, 27D, 27E, 27F, 27H bottom 31, 35, 38 through holes 32, 36 screw holes 41 through hole 42 Convex part 51, 52 Notches 55, 56 Convex parts 60A, 60B, 70A, 70B joints 61A, 61B, 71A, 71B joint surface 65, 67 Notch 75, 77 Bend 90 screws L1~L6 Length of the underframe in the X direction

Claims

1. An indoor unit of an air conditioner, A blower fan and a frame that is disposed behind the indoor unit relative to the blower fan and supports both ends of the blower fan; Equipped with The underframe is a first frame portion; a second underframe portion disposed so as to overlap a portion of the first underframe portion in the up-down direction and the front-rear direction; Including, the first frame portion and the second frame portion are joined together at a first portion where the first frame portion and the second frame portion overlap in the up-down direction, the first underframe portion and the second underframe portion are joined together at a second portion where the first underframe portion and the second underframe portion overlap in the front-rear direction; Air conditioner indoor unit.

2. In the first portion, the first frame portion and the second frame portion are joined together by screws. The indoor unit of an air conditioner according to claim 1.

3. In the second portion, the first frame portion, the second frame portion, and an air outlet grill that guides air are joined together. The indoor unit of an air conditioner according to claim 1.

4. the first frame portion has a through hole in the second portion, the second frame portion has a first protrusion in the second portion that is inserted into the through hole; The indoor unit of an air conditioner according to claim 1.

5. the through hole and the first protrusion are provided in a lower portion of the second portion; The indoor unit of an air conditioner according to claim 4.

6. the first frame portion has a first notch in the second portion, the second frame portion has a second protrusion in the second portion that is slidably inserted into the first cutout; The indoor unit of an air conditioner according to claim 1.

7. the first frame portion has a plurality of notches in the second portion, the second frame portion has a plurality of second protrusions in the second portion that are slidably inserted into the plurality of cutouts, respectively; The indoor unit of an air conditioner according to claim 1.

8. the first frame portion further includes a third protrusion in the second portion, the second frame portion further has a second notch in the second portion into which the third protrusion is slidably inserted, The second cutout is provided at a position different from that of the first cutout in the up-down direction. The indoor unit of an air conditioner according to claim 6.

9. The first frame portion is a first surface facing the blower fan; a second surface opposite the first surface; and the first frame portion includes, in the second portion, a first bonding portion including a first bonding surface recessed in a direction from the first surface toward the second surface and a third notch; The second underframe portion is a third surface facing the blower fan; a fourth surface opposite the third surface; and the second underframe portion includes, in the second portion, a second bonding portion including a second bonding surface recessed in a direction from the fourth surface toward the third surface, the second joint portion is slidably inserted into the third notch of the first joint portion in the second portion; The first bonding surface and the second bonding surface are in contact with each other. The indoor unit of an air conditioner according to claim 1.

10. the second joint portion has an inverted L-shape in the second portion when viewed from a direction in which the second joint portion slides into the third notch of the first joint portion; The indoor unit of an air conditioner according to claim 9.

11. the first joint portion further includes a fourth notch provided at a position different from the third notch in the up-down direction, The second joint portion is slidably inserted into the third notch and the fourth notch of the first joint portion in the second portion. The indoor unit of an air conditioner according to claim 9.

12. the second joint portion has a concave shape recessed in a direction from the fourth surface toward the third surface when viewed from a direction in which the second joint portion slides into the third cutout and the fourth cutout of the first joint portion, The indoor unit of an air conditioner according to claim 11.

13. a plurality of sets including the first frame portion and the second frame portion; The indoor unit of an air conditioner according to claim 1.

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