air conditioning

Abstract

An air conditioning system is provided that prevents hairline cracking of a mounting bracket for screws in a plate attached to an indoor unit using the screws, and prevents cracking and damage to the plate. The air conditioning system comprises the indoor unit, which draws air from an air intake opening and, via an internal heat exchanger, discharges it from an air outlet opening; the plate, which is attached to the indoor unit and has a plate air intake opening where at least part of the plate overlaps the air intake opening; and a cover piece. The plate includes a mounting bracket provided around the plate air intake opening, to which screws are attached for securing the plate to the indoor unit. The cover piece covers the screws and seals the mounting bracket, thus preventing oil and cleaning agents in the air from accumulating on the mounting bracket.

Description

Technical area

[0001] The present invention relates to an air conditioner equipped with a ceiling plate detachably attached to an indoor unit. background

[0002] An air conditioner comprises an indoor unit installed above a ceiling and a ceiling plate attached to a lower end of the indoor unit.

[0003] The ceiling plate has a square frame and is attached to a lower end of the indoor unit via plate fixing screws and mounting brackets provided at four corners of the frame. The corners of the frame are covered with removable corner covers (see, for example, Patent Document 1). Citation listPatent document

[0004] Patent Document 1 International Publication, No. WO 2018 / 154765 Overview of the inventionProblem to be solved by the invention

[0005] In state-of-the-art air conditioning systems, when oil or cleaning agents suspended in the air in a room being air-conditioned adhere to a ceiling tile, a chemical change between the oil or cleaning agent and a resin forming the ceiling tile causes tiny cracks in the resin forming the ceiling tile. This phenomenon is called crazing. If stress is applied to the resin in which such tiny cracks have been created, the resin is more likely to crack.

[0006] In a prior art structure in which a ceiling panel is fixed to an indoor unit using panel fixing screws, in a case where there is a gap between a corner cover and a corner portion, outside air may penetrate through the gap, and oil or detergent contained in the outside air may deposit at the corner portion, causing crazing in a resin forming the corner portion. Consequently, cracks and damage are more likely to occur in the corner portion where stress is applied by the panel fixing screws than during manufacturing, resulting in a problem of deterioration in the lifespan and aesthetic appearance of the ceiling panel.

[0007] The present disclosure has been made to solve the problems described above, and an object thereof is to provide an air conditioner that can prevent the occurrence of crazing caused by deposition of oil or detergent in the air at a portion where screws of a ceiling plate are attached, as well as cracking and damage of the ceiling plate. Means of solving the problem

[0008] An air conditioner according to the present disclosure is configured such that a cover piece that covers screws of a ceiling plate and seals an attachment part is provided in the attachment part, which is a region where the screws of the ceiling plate are attached, so that deposition of oil, detergent, or the like suspended in the air and causing hairline cracking on the attachment part is prevented. Effects of the invention

[0009] When an air conditioner of the present disclosure is used, the cover piece covers screws of a ceiling panel in an attachment part where the screws are installed and seals the attachment part. Therefore, it is possible to isolate the attachment part from the outside air. Consequently, it is possible to prevent the occurrence of hairline cracking caused by deposition of oil, detergent, or the like suspended in the air at the attachment part, and to prevent cracking and damage to the ceiling panel. Short description of the drawings Fig. 1 is a perspective view showing an air conditioner according to an embodiment of the present disclosure. Fig. 2 is a plan view showing an air conditioner according to the embodiment of the present disclosure. Fig. 3 is a plan view showing a plate, a filter, and a filter outer frame according to the embodiment of the present disclosure. Fig. 4 is a plan view showing the plate and the filter outer frame according to the embodiment of the present disclosure. Fig. 5 is a perspective view showing the plate and the filter outer frame according to the embodiment of the present disclosure. Fig. 6 is a plan view showing the plate according to the embodiment of the present disclosure. Fig. 7 is a front perspective view and a rear perspective view of the filter outer frame according to the embodiment of the present disclosure. Fig. 8 is a perspective view of a portion D1 and a perspective view of a portion D2 of the filter outer frame according to the embodiment of the present disclosure. Fig. 9 is a perspective view and a plan view of a portion C of the plate according to the embodiment of the present disclosure. Fig. 10 is a perspective view showing how the filter outer frame is attached to the plate according to the embodiment of the present disclosure. Fig. 11 is a perspective view showing a portion B in a state where the filter outer frame is attached to the panel according to the embodiment of the present disclosure. Fig. 12 is a plan view showing the area B in a state where the filter outer frame is attached to the plate according to the embodiment of the present disclosure. Fig. 13 is a cross-sectional view taken along line DD of the plate and the filter outer frame according to the embodiment of the present disclosure. Fig. 14 is a cross-sectional view showing an air conditioner according to the embodiment of the present disclosure. Description of embodiments

[0010] Hereinafter, a configuration of an air conditioner according to the present disclosure will be described with reference to the drawings. Here, like reference numerals denote the same or equivalent components, and the description thereof will be omitted or simplified as appropriate. This will be consistent throughout the specification. The description of this application is not limited to the following embodiment and may be modified or omitted without departing from the spirit of this application. In particular, the shapes of the constituent elements shown in this application are merely examples and are not limited to the shapes described in the specification. The drawings may illustrate actual structures in a simplified manner. Furthermore, the size of each component and positional relationships between the components in the drawings may differ from actual ones.

[0011] Furthermore, in the following description, terms expressing orientations (e.g., "front," "front side," "in front," "back," "rear," "rear side," "depth," "inside," "outside," and the like) are used appropriately, but these terms indicate the relative positional relationships between components and do not limit the content of the present disclosure. In addition, a "front-to-rear direction" is a vertical direction when an air conditioner is installed in a usable state. In the front-to-rear direction, a direction from the ceiling surface toward the interior is assumed to be a forward direction. The direction opposite to the forward direction is a backward direction.In addition, regarding the terms such as “inside” and “outside,” in a case where the air conditioner is installed in a usable state and each component is viewed from the interior, a side near the center is called an “inside,” and a side closer to an end than the center is called an “outside.” First embodiment

[0012] Parts (a) and (b) of the Fig. 1 are perspective views showing the overall structure of an air conditioner 100 according to a first embodiment of the present disclosure. Part (a) of Fig. 1 is a perspective view of the air conditioner 100 as seen from above the ceiling.

[0013] Part (b) of the Fig. 1 is a perspective view of the air conditioner 100 as seen from the interior.

[0014] Fig. 2 is a plan view of the air conditioner 100 as seen from the interior.

[0015] Fig. 14 is a cross-sectional view of the air conditioner 100.

[0016] The air conditioner 100 according to this embodiment is installed such that a part of it is embedded in the ceiling.

[0017] The air conditioner 100 includes an indoor unit 1 having built-in equipment for air circulation, temperature adjustment, and the like, and a panel 2 which is a ceiling panel and is detachably attached to the indoor unit 1.

[0018] The indoor unit 1 comprises a casing 110 and suspensions 3 are provided at respective corners of the casing 110. The indoor unit 1 is mounted above the ceiling by penetrating suspension bolts 4 (not shown) installed on a beam or the like above the ceiling through the suspensions 3 and attaching nuts 5 (not shown) to the suspension bolts 4. When the indoor unit 1 is mounted above the ceiling, a lower surface portion 6 (in the Fig. 2) of the housing 110 faces the interior. The indoor unit 1 has an air intake opening 7, which is a substantially rectangular opening, on the lower surface portion 6 of the housing 110. The indoor unit 1 has an air discharge opening 8, which is a substantially rectangular opening, on the lower surface portion 6 of the housing 110 such that it is spaced from the air intake opening 7. The indoor unit 1 has a heat exchange chamber 111 within the housing 110 and includes an indoor heat exchanger 112 within the heat exchange chamber 111. The heat exchange chamber 111 is connected to the air intake opening 7 and the air discharge opening 8, and the indoor heat exchanger 112 exchanges heat with the air and is provided to regulate the air to a set temperature. The indoor unit 1 includes a fan 113 in the heat exchange chamber 111.The fan 113 sucks air from a target space (indoor space) through the air intake port 7 into the heat exchange chamber 111, lets the sucked air flow through the indoor heat exchanger 112, and blows out the air whose temperature has been changed by the indoor heat exchanger 112 from the air exhaust port 8.

[0019] One in the Fig. The front side of the panel 2 shown in Figure 2 in the front-to-rear direction is assumed to be the front side of the panel 2. The panel 2 has a substantially rectangular shape when viewed from the front. The panel 2 is attached to the front side of the indoor unit 1 to cover the lower surface portion 6 of the indoor unit 1. Fig. 2 is an area within a dashed line with a size smaller than the plate 2, the lower surface section 6. If the plate 2 is in the Fig. 2, a grille 10 is attached to the lower side of the plate 2. The grille 10 has a rectangular frame shape and includes a grille air intake opening 11, which is a substantially rectangular opening. The grille 10 includes the grille air intake opening 11 with a mesh-like mesh piece 11a. The plate 2 includes a plate air intake opening 13, which is a substantially rectangular opening, within the grille air intake opening 11. Furthermore, the plate air intake opening 13 and the air intake opening 7 are substantially superimposed. Fig. 2, the plate air intake port 13 and the air intake port 7 are shown by a common dashed line within the grille air intake port 11. A positional relationship between the air intake port 7, the plate air intake port 13, and the grille air intake port 11 is not limited thereto. The plate air intake port 13 is arranged at a position corresponding to the air intake port 7 of the indoor unit 1, and at least parts thereof overlap with each other in the front-to-rear direction. In addition, the grille air intake port 11 is arranged at a position corresponding to the plate air intake port 13 and the air intake port 7, and at least a part thereof overlaps with the plate air intake port 13 and the air intake port 7 in the front-to-rear direction.

[0020] If the plate 2 in the Fig. 2, the panel 2 is provided with a panel air blow-out opening 12, which is a substantially rectangular opening, spaced from the grille 10 above the grille 10. A wind deflector 9 is attached to the panel air blow-out opening 12 to adjust the direction in which the air is blown out. The panel air blow-out opening 12 is arranged at a position corresponding to the air blow-out opening 8 of the indoor unit 1, and at least parts of them overlap with each other in the front-to-rear direction. The indoor unit 1 includes the air blow-out opening 8 so that it is closer to the center of the lower surface portion 6 than the panel air blow-out opening 12.

[0021] Indoor air to be conditioned is drawn into the indoor unit 1 through the grille air intake opening 11, the plate air intake opening 13, and the air intake opening 7. Air whose temperature and humidity have been adjusted by the indoor unit 1 is blown out into the interior from the air outlet opening 8 and the plate air outlet opening 12.

[0022] Fig. 3 is a view showing the plate 2 in the same direction as in the Fig. 2, where the grid 10 is removed from the plate 2. In the Fig. 3, the air intake opening 7 and the plate air intake opening 13 are shown by a common dashed line. A filter outer frame 15 is detachably attached to the plate 2 so that it surrounds the plate air intake opening 13. The filter outer frame 15 comprises an outer frame attachment piece 18, a side surface piece 16 (in the Fig. 5 and in parts (a) and (b) of the Fig. 7), and a plurality of support hooks 17 extending substantially horizontally inward from the side surface piece 16. A filter 20 is detachably supported by the filter outer frame 15 via the support hooks 17, and the air intake opening 7 and the plate air intake opening 13 are covered by the filter 20.

[0023] Fig. Figure 4 is a diagram showing the plate 2 and the filter outer frame 15 in the same direction as in the Fig. 2 and Fig. 3. In the Fig. 4, the grid 10 and the filter 20 are removed from the plate 2.

[0024] Fig. Fig. 5 is a perspective view showing the plate 2 and the filter outer frame 15 having the same configuration as in Fig. Fig. 4. The filter outer frame 15 includes a cover piece 30 (a first cover piece 31, a second cover piece 32, and a third cover piece 33) for covering an attachment piece 40 (a first attachment piece 41, a second attachment piece 42, and a third attachment piece 43) of the plate 2, which will be described later.

[0025] Fig. Figure 6 is a plan view showing the plate 2 in the same direction as in Figures Fig. 2 and Fig. 3 shows. In the Fig. 6, the grille 10, the filter outer frame 15, and the filter 20 are removed from the plate 2. The plate 2 has the plate air intake port 13 and is provided with an intake port edge piece 25 along the plate air intake port 13 such that the intake port edge piece 25 surrounds the plate air intake port 13. The intake port edge piece 25 is a rectangular frame-like member with a right-left longitudinal direction.

[0026] The intake opening edge piece 25 includes an upper intake opening edge piece 25a, a lower intake opening edge piece 25b, a right intake opening edge piece 25c, and a left intake opening edge piece 25d, which extend linearly along the plate air intake opening 13. The terms “upper, lower, right, and left” used herein refer to relative positional relationships between parts constituting the intake opening edge piece 25 when the plate 2 is in the Fig. 6. Each of the pieces 25a, 25b, 25c, and 25d of the intake port edge piece has a predetermined width in a transverse direction when the panel 2 is viewed from the front. The upper intake port edge piece 25a is provided on the panel air blow-out port 12 side. The lower intake port edge piece 25b is provided at a position having the panel air intake port 13 between it and the upper intake port edge piece 25a. The right intake port edge piece 25c is provided between a right end portion of the upper intake port edge piece 25a and a right end portion of the lower intake port edge piece 25b. The left intake opening edge piece 25d is provided between a left end portion of the upper intake opening edge piece 25a and a left end portion of the lower intake opening edge piece 25b.

[0027] The plate 2 includes the first attachment piece 41, the second attachment piece 42 and the third attachment piece 43 in the vicinity of the plate air intake opening 13, the attachment pieces being the attachment piece 40 to which the fasteners 23 for fixing the plate 2 to the indoor unit 1 are attached.

[0028] Part (a) of the Fig. 7 is a front perspective view of the filter outer frame 15.

[0029] Part (b) of the Fig. 7 is a rear perspective view of the filter outer frame 15.

[0030] The filter outer frame 15 is assembled using parts (a) and (b) of the Fig. 7 described.

[0031] The filter outer frame 15 includes a rectangular frame-like outer frame attachment piece 18. The outer frame attachment piece 18 is attached to the intake opening edge piece 25 of the panel 2 so as to surround the panel air intake opening 13. The outer frame attachment piece 18 includes an upper outer frame attachment piece 18a, a lower outer frame attachment piece 18b, a right outer frame attachment piece 18c, and a left outer frame attachment piece 18d. The terms “upper, lower, right, and left” used herein refer to relative positional relationships between parts constituting the outer frame attachment piece 18 when the outer frame attachment piece 18 is in the Fig. 4. The upper outer frame attachment piece 18a is provided on the side of the plate air blow-out opening 12 of the outer frame attachment piece 18.

[0032] The lower outer frame attachment piece 18b is provided in the outer frame attachment piece 18 at a position having the plate air intake port 13 between it and the upper outer frame attachment piece 18a. The right outer frame attachment piece 18c is provided between a right end portion of the upper outer frame attachment piece 18a and a right end portion of the lower outer frame attachment piece 18b. The left outer frame attachment piece 18d is provided between a left end portion of the upper outer frame attachment piece 18a and a left end portion of the lower outer frame attachment piece 18b. Each of the pieces 18a, 18b, 18c, and 18d of the outer frame attachment piece 18 extends substantially horizontally and is formed to have a predetermined width in the transverse direction thereof.

[0033] The filter outer frame 15 includes the side surface piece 16 projecting from the outer periphery of the outer frame attachment piece 18 with a predetermined width in the front-to-rear direction and constituting the outer surface of the filter outer frame 15, and the plurality of support hooks 17 projecting from the outer frame attachment piece 18 with a predetermined distance in the front-to-rear direction from a front end 16a (in part (a) of the Fig. 7) of the side surface piece 16. The support hooks 17 are arranged on a side closer to the front side (the near side as viewed from the inside) than the outer frame attachment piece 18. The filter outer frame 15 further includes a mesh-like grid portion 22 connected to the outer frame attachment piece 18, provided on the inside of the outer frame attachment piece 18, and overlapping with the plate air intake port 13 and the air discharge port 80 in the front-to-rear direction.

[0034] The filter outer frame 15 includes a support member 21 that extends upward from the front end 16a of the side surface piece 16 at a predetermined distance in the front-to-rear direction to the outer frame attachment piece 18. The support member 21 holds the filter outer frame 15 to the plate 2 and determines the attachment position of the filter outer frame 15 in the front-to-rear direction.

[0035] The filter 20 is sandwiched between the outer frame attachment piece 18 and the support hook 17, and the filter 20 is detachably attached to the filter outer frame 15. The filter 20 is a member for removing dust, oil, detergent, and the like from the air sucked into the air conditioner 100.

[0036] The outer frame attachment piece 18 and the side surface piece 16 of the filter outer frame 15 are covered and hidden from the interior by the grille 6 during normal use of the air conditioner 100, thereby improving the design of the air conditioner 100.

[0037] As described in parts (a) and (b) of the Fig. As shown in Fig. 7, the filter outer frame 15 includes the first lid piece 31 in a lower right corner region (region D1) of the outer frame attachment piece 18. Further, the filter outer frame 15 includes a second lid piece 32 at a position symmetrical to the first lid piece 31 along a center line AA. The configuration of the second lid piece 32 is symmetrical to the configuration of the first lid piece 31 with respect to the line AA, and a description thereof will therefore be omitted. Furthermore, the filter outer frame 15 includes a third lid piece 33 on the line AA of the upper outer frame attachment piece 18a, the third lid piece 33 including an inwardly projecting part thereof.

[0038] Part (a) of the Fig. Fig. 8 is an enlarged view of the first cover piece 31 and the surrounding area D1 in the part (a) of the Fig. 7. Part (a) of the Fig. Figure 8 is a diagram of the area D1 as viewed at an angle different from that shown in part (a) of the Fig. 7, and is a perspective view of the first cover piece 31 when viewed from the front and central side of the filter outer frame 15.

[0039] Part (b) of the Fig. Fig. 8 is an enlarged view of the first lid piece 31 and a surrounding area D2 in the part (b) of the Fig. 7.

[0040] The first cover piece 31 is made using parts (b) and (b) of the Fig. 8 described.

[0041] The first cover piece 31 includes a cover piece 35 and a cover wall piece 36. The cover piece 35 is a substantially rectangular plate-like member. The cover wall piece 36 is provided to protrude further rearward than a rear surface 35a of the cover piece 35. The rear surface 35a of the cover piece 35 is a surface that faces a first wall piece 61 of the first attachment piece 41 when the filter outer frame is attached to the plate 2.

[0042] The upper left corner portion of the cover piece 35 protrudes further inward than the lower outer frame attachment piece 18b and the right outer frame attachment piece 18c. The cover piece 35 has a rounded upper left corner portion. The cover piece 35 has an upper end connected to the right outer frame attachment piece 18c and a left end connected to the lower outer frame attachment piece 18b. The cover piece 35 is integrally formed with the lower outer frame attachment piece 18b and the right outer frame attachment piece 18c and forms a part of the outer frame attachment piece 18. In other words, in this embodiment, a part of the outer frame attachment piece 18 is used as the cover piece 35.

[0043] The cover wall piece 36 includes a first cover wall piece 36a which protrudes further rearward than the upper end of the cover piece 35 and extends to the right and left, a second cover wall piece 36b which protrudes further rearward than the left end of the cover piece 35 and extends vertically, and a third cover wall piece 36c which is provided between the first cover wall piece 36a and the second cover wall piece 36b with a curved surface and extends further rearward than the cover piece 35. The cover piece 35 and the cover wall piece 36 are integrally formed using a resin.

[0044] Similarly, the second lid piece 32 includes a cover piece 38 and a cover wall piece 65. Further, the third lid piece 33 includes a cover piece 39 and a cover wall piece 66. The cover piece 38 and the cover piece 39 are substantially rectangular plate-shaped members. A part of the cover piece 39 is a member identical to the upper outer frame attachment piece 18a. A part of the cover piece 39 protrudes further inward than the upper outer frame attachment piece 18a. The cover piece 66 is provided along the outer edge of the cover piece 39 to have a U-shape with an inwardly curved shape and protrudes toward the rear side.

[0045] The first cover piece 31 includes a guide rib 85 provided to protrude further rearward than the rear surface 35a of the cover piece 35. The guide rib 85 is formed of two ribs extending substantially orthogonally to the first cover wall piece 36a and the second cover wall piece 36b, respectively. The guide rib 85 is provided on the inner side of the cover piece 35 at a distance from the cover wall piece 36 that is greater than or equal to the thickness of the first wall piece 61. With such a structure, when the filter outer frame 15 is attached to the plate 2, the first wall piece 61 can be arranged between the cover wall piece 36 and the guide rib 85, and the first cover piece 31 can be easily attached to the attachment piece 41 of the first cover piece 31.

[0046] The guide rib 85 has a tapered surface 89 at one end of a rear end portion 88 facing the cover wall portion 36 in a direction in which its front-to-rear width decreases toward the cover wall portion 36. By providing the tapered surface 87 on the guide rib 85, the first wall portion 61 is guided between the cover wall portion 36 and the guide rib 85 by the tapered surface 89 when the tip of the first wall portion 61 contacts the tapered surface 89 at the time of attaching the filter outer frame 15 to the plate 2. With such a configuration, the filter outer frame 15 can be easily positioned on the plate 2.

[0047] The first cover piece 31 includes a gasket 95 on the rear surface 35a of the cover piece 35. The gasket 95 has a rectangular frame shape and is provided along the four sides of the cover piece 35 between the cover wall piece 36 and the guide rib 85. The gasket 95 has a shape corresponding to the front end portion of the first wall piece 61, which will be described later.

[0048] Although not shown in the drawing, the second cover piece 32 similarly includes a gasket 96 provided in a rectangular frame shape on the rear surface 38a of the cover piece 38. The third cover piece 33 includes a gasket 97 provided in a rectangular frame shape on a rear surface 39a of the cover piece 39.

[0049] When the filter outer frame 15 is attached to the plate 2, the gasket 85 contacts the first wall piece 61, and the first cover piece 31 and the attachment piece 41 form a cavity 80 therebetween to seal the first attachment piece 41.

[0050] When the filter outer frame 15 is attached to the plate 2, the gasket 96 similarly contacts a second wall piece 62, and the second cover piece 32 and the second attachment piece 42 form a sealed cavity 82 therebetween to seal the second attachment piece 42. Additionally, when the filter outer frame 15 is attached to the plate 2, the gasket 97 contacts a third wall piece 63, and the third cover piece 33 and the third attachment piece 43 form a sealed cavity 83 therebetween to seal the third attachment piece 43. In the present disclosure, the first wall piece 61, the second wall piece 62, and the third wall piece 63 are collectively referred to as a wall piece 60.

[0051] The first cover piece 31 includes a first closure means 71. The first closure means 71 is a substantially rectangular plate-shaped element and is provided on the first cover piece 31 such that a portion thereof is embedded in an outer surface piece 37 formed by the cover piece 35 and the second cover wall piece 36b. The longitudinal direction of the first closure means 71 substantially coincides with the front-to-back direction when the filter outer frame 15 is attached to the plate 2. The first closure means 71 includes a first grip piece 73 that protrudes further forward than the first cover piece 31 and a first fastening piece 75 that protrudes further rearward than the cover piece 35. The first fastening piece 75 extends along a side surface of the wall piece 61 toward the indoor unit 1 when the filter outer frame 15 is attached to the plate 2.The first fastening piece 75 comprises a first locking counterpart 77. The first locking counterpart 77 is then provided on a surface 72a of the first fastening piece 75, which corresponds to a first locking piece 53 (shown by a dashed line in a part (a) of the . Fig. 9) in a state in which the filter outer frame 15 is attached to the plate 2. The first locking counterpart 77 couples a partition rib 46 to the first locking piece 53. In this embodiment, the first locking counterpart 77 is a hook 79. The first locking piece 53 is a step piece 58. The filter outer frame 15 is attached to the plate 2 by the hook 79, which hooks onto the step piece 58.

[0052] The first closure means 71 includes a convex reinforcement piece 90 on a surface 71a opposite the surface where the hook 79 is provided. The reinforcement pieces 90 are provided at two ends of the surface 71a in the longitudinal direction of the first closure means 71, from the first grip piece 73 to the first attachment piece 75.

[0053] Since the first fastener 71 includes the reinforcement piece 90, the durability of the fastener 71 is improved, and when the first grip piece 73 is pressed with a finger, the finger is less likely to slip off, and operability is improved. In addition, since the first attachment piece 75 is less likely to bend with respect to the first grip piece 73, the first attachment piece 75 can be easily moved by the user's operation of the grip piece 73, and the hook 79 can be easily detached from the step piece 58. Furthermore, the width of the outer surface piece 37 between the front and rear is narrower than others in the vicinity of the first fastener 71, and thus, a force when the first grip piece 73 is pressed with a finger can easily act on the first attachment piece 75.

[0054] Part (a) of the Fig. Fig. 9 is a perspective view showing the first attachment piece 41 of the plate 2 and its surroundings (a region C in Fig. 6) and is a diagram showing a state in which the filter outer frame 15 is not attached to the plate 2.

[0055] Part (b) of the Fig. 9 is a plan view of part (a) of the Fig. 9.

[0056] Part (c) of the Fig. Fig. 9 is a diagram showing a state in which a screw 24 is used in the configuration of part (b) of the Fig. 9 is not attached to the first attachment piece 41.

[0057] The first attachment piece 41 of the plate 2 is made using parts (a), (b) and (c) of the Fig. 9 described.

[0058] The suction opening edge piece 25 is provided with the first attachment piece 41 for attaching the plate 2 to the indoor unit 1 at the lower right corner.

[0059] The first attachment piece 41 is disposed between the lower intake port edge piece 25b and the right intake port edge piece 25c, and is connected to the lower intake port edge piece 25b and the right intake port edge piece 25c. The first attachment piece 41 is a substantially rectangular member in plan view. The first attachment piece 41 is integrally formed with the lower intake port edge piece 25b and the right intake port edge piece 25c using a resin. The upper left corner of the first attachment piece 41 protrudes further inward than the inner edges of the lower intake port edge piece 25b and the right intake port edge piece 25c.

[0060] As in the Fig. 6, the intake port edge piece 25 further includes the second attachment piece 42 for attaching the panel 2 of the indoor unit 1 in the lower left corner portion. The second attachment piece 42 is disposed between the lower intake port edge piece 25b and the left intake port edge piece 25d, and is connected to the lower intake port edge piece 25b and the left intake port edge piece 25d. The second attachment piece 42 is a substantially rectangular member in plan view. The second attachment piece 42 is integrally formed with the lower intake port edge piece 25b and the left intake port edge piece 25d using a resin. The upper right corner portion of the second attachment piece 42 protrudes further inward than the inner edges of the lower intake port edge piece 25b and the left intake port edge piece 25d.

[0061] As in the Fig. As shown in Figure 6, the intake port edge piece 25 further includes the third attachment piece 43 for attaching the panel 2 to the indoor unit 1 in a central portion to the right and left of the upper intake port edge piece 25a. A part of the third attachment piece 43 is a member similar to the upper intake port edge piece 25a. The third attachment piece 43 has a substantially rectangular shape, with a part protruding further inward than the inner edge of the upper intake port edge piece 25a. The third attachment piece 43 is integrally formed with the upper intake port edge piece 25a using a resin.

[0062] The first attachment piece 41, the second attachment piece 42, and the third attachment piece 43 each have a screw hole 44, and the screws 24, which are the fasteners 23 for fixing the plate 2 to the indoor unit 1, are fitted in the screw holes 44.

[0063] The suction opening edge piece 25 (not shown) comes into contact with the indoor unit 1 when the plate 2 is fixed to the indoor unit 1 with the screws 24 installed in the first attachment piece 41, the second attachment piece 42, and the third attachment piece 43, respectively.

[0064] The plate 2 includes a plate peripheral wall 27 that extends further forward than the outer periphery of the intake opening edge piece 25. The plate peripheral wall 27 is provided in a square cylindrical shape on the outer periphery of the intake opening edge piece 25. The plate peripheral wall 27 has a shape that extends forward. The intake opening edge piece 25 is arranged between the plate peripheral wall 27 and the plate air intake opening 13. The plate peripheral wall 27 is formed by an upper plate peripheral wall 27a (in a part (a) of the Fig. 10) provided at the outer edge of the upper intake opening edge piece 25a, a lower plate peripheral wall 27b provided at the outer edge of the lower intake opening edge piece 25b, and a right plate peripheral wall 27c provided at the outer edge of the right intake opening edge piece 25c, and a left plate peripheral wall 27d (shown in the part (a) of Fig. 10) provided on the outer edge of the left intake opening edge piece 25a. The plate 2 has an insertion opening 28 (which is shown in the part (a) of Fig. 10), which is an opening into which a projection 19 (not shown) of the filter outer frame 15 is inserted, is provided on both the right and left sides of the center line AA on the upper plate peripheral wall 27a.

[0065] The plate 2 includes a grille attachment surface 26 so as to surround the plate peripheral wall 27. The grille attachment surface 26 is a surface covered by the grille 10 when the grille 10 is attached to the plate 2. The plate 2 includes, on one side of the grille attachment surface 26, a pair of grille attachment pieces 95 that serve as a pivot point for supporting the grille 10, allowing the grille 10 to be opened and closed and the grille 10 to be rotated.

[0066] The plate 2 includes a plurality of flat, plate-like support ribs 29 extending further forward than a front surface 25e of the intake port edge piece 25. The plurality of support ribs 29 are provided with a predetermined width in the front-to-rear direction with respect to the front surface 25e. The plurality of support ribs 29 are also connected to the plate peripheral wall 27 in a direction substantially perpendicular to the plate peripheral wall 27. The intake port edge piece 25, the plate peripheral wall 27, and the plurality of support ribs 29 are integrally formed using a resin. The front end of the plate peripheral wall 27 is located further forward than the front end of the support ribs 29.A rear surface 15a of the filter outer frame 15 (not shown, this corresponds to the rear surface of the outer frame attachment piece 18) contacts the front end of the support ribs 29, and thus the position of the filter outer frame 15 is fixed in the front-to-rear direction with respect to the plate 2. The filter outer frame 15 is attached to the inner side of the plate peripheral wall 27.

[0067] The first attachment piece 41 has the screw hole 44, and the panel 2 is attached to the indoor unit 1 by screwing the screw 24 into the screw hole 44 and a screw hole (not shown) formed in the indoor unit 1. The screw 24 includes an annular screw head 24a. In a state where the screw 24 is attached to the screw hole 44, a region where the first attachment piece 41 is covered with the screw when the panel 2 is viewed from the front is referred to as a screw attachment region 45. The barrier rib 46 is provided in a vicinity 41c of the first attachment piece 41 so as to surround the screw attachment region 45 and protrude forward. In other words, the barrier rib 46 is provided in the vicinity of the first attachment piece 41 so as to surround the screw 24 and protrude forward.

[0068] The partition rib 46 includes a first partition rib 46a provided at an upper end 41a of the first attachment piece 41 in a left-right direction, a second partition rib 46b provided at a left end 41b of the first attachment piece 41 in an up-down direction, and a third partition rib 46c connected to the first partition rib 46a and the second partition rib 46b and having a curved surface. Furthermore, the lower plate peripheral wall 27b in contact with the first attachment piece 41 includes a first plate wall piece 50 that is convex inward in the thickness direction of the lower plate peripheral wall 27b along the first attachment piece 41. The right plate peripheral wall 27c in contact with the first attachment piece 41 has a second plate wall piece 51 (a portion to the left of a dashed line portion of the plate peripheral wall 27 in parts (a) and (b) of the Fig. 13) that is convex inward in the thickness direction of the right plate peripheral wall 27c along the first attachment piece 41. The widths in the front-to-rear direction of the partition rib 46, the first plate wall piece 50, and the second plate wall piece 51 are substantially the same.

[0069] The first attachment piece 41 has a recess 47 cut inward from a point at the upper end 41a of the first attachment piece to a point at the left end 41b of the first attachment piece. The partition rib 46 has a concave portion 48 provided in the first attachment piece 41 along the recess 47 and protrudes forward with a predetermined width in the front-to-rear direction. A connecting portion between the upper end of the concave portion 48 and the first partition rib 46a is rounded. The partition rib 46 has a support surface portion 56 extending on the outer side (a side opposite the screw attachment portion 45 on the left side) of the first attachment piece 41 substantially horizontally with respect to the front end of the concave portion 48.The shape of the support surface piece 56 substantially coincides with an area cut out by the recess 47. The outer edge of the support surface piece 46 comes into contact with the first separating rib 46a, the second separating rib 46a, and the third separating rib 46c.

[0070] The separating rib 46, the concave portion 48, the support surface piece 56, the first plate wall piece 50, and the second plate wall piece 51 form a cylindrical first wall piece 61. The first wall piece 61 is provided to surround the first attachment piece 41 and protrude further forward than its periphery. The first attachment piece 41 and the first wall piece 61 are integrally formed using a resin.

[0071] A step piece 58 is formed by the support surface piece 56 and the second partition rib 46b, which is connected to the support surface piece 56 and arranged at the front. The step piece 58 is a locking piece 55 for hooking the hook 79, which is a first locking counterpart 77 of the filter outer frame 15. The widths in the front-rear direction of the step piece 58 and the gasket 95 substantially coincide with a distance between the hook 79 and the cover piece 35.

[0072] Further, the panel 2 includes the second attachment piece 41 and the second wall piece 62 at positions symmetrical with respect to the center line AA of the first attachment piece 41. The second wall piece 62 is provided to surround the second attachment piece 42 and protrude further forward than its periphery. Configurations of the second attachment piece 42 and the second wall piece 62 are symmetrical with respect to the center line AA of the first attachment piece 41 and the first wall piece 61, and thus, description thereof will be omitted. Further, the panel 2 includes the third attachment piece 43 and the third wall piece 63, which partially protrude inward on the center line AA of the upper intake opening edge piece 25a. A part of the third attachment piece 43 protrudes toward the inside of the intake opening edge piece 25a.The third wall piece 63 has a cylindrical shape and is provided so as to surround the third attachment piece 43 and protrude further forward than its circumference.

[0073] Part (c) of the Fig. Fig. 9 is a diagram showing a configuration in which the screw 24 is removed from the first attachment piece 41 in the part (b) of the Fig. 9 is removed. A support structure 49 that supports the screw 24 is provided in the screw attachment portion 45 and has a structure that projects forward. The support structure 49 includes a plurality of circular ribs 49a with different radii provided concentrically around the screw hole 44, and a connecting rib 49b that connects the circular ribs 49a. When the support structure 49 is provided in the first attachment piece 41, stress generated in a part of the support structure 49 that comes into contact with the screw head 24a is dispersed by the support structure 49 at the time of attaching the screw 24 to the first attachment piece 41, and thus, cracking of the first attachment piece 41 due to contact with the screw 24 is prevented.

[0074] The screw attachment portion 45 and the screw 24 are covered by the first wall piece 61 when the first wall piece 61 is attached to the first attachment piece 41. The screw attachment portion 45 and the screw 24 are sealed by the first wall piece 61 when the first wall piece 61 is attached to the first attachment piece 41. The same applies to the screw attachment portion 45 and the screw 24 provided on the second attachment piece 42 and the third attachment piece 43.

[0075] The shapes of the attachment piece 40 and the lid piece 30 in this embodiment are not limited thereto, and an ellipse, a circle, or a polygon other than a substantially rectangular shape may be appropriately used.

[0076] A procedure for attaching the filter outer frame 15 to the plate 2 is described.

[0077] A user views plate 2 along a line drawn in the Fig. 4 and holds the right and left ends of the filter outer frame 15 in a direction shown in the Fig. 4 with his or her right or left hand. Then, the support piece 21 of the filter outer frame 15 is turned towards the side of the plate 2, the filter outer frame 15 is turned in a direction indicated by an arrow on the right side of part (a) of the Fig. 10 and the projection 19 is inserted into the insertion hole 28 of the plate 2. Then, the filter outer frame 15 is moved in a direction indicated by an arrow on the left side of part (a) of the Fig. 10 so that the filter outer frame 15 is fitted into the plate peripheral wall 27. At this time, the hook 79, which is the first locking counterpart 77 included in the first locking means 71 provided in the first lid piece 31 of the filter outer frame 15, hooks into the step piece 58, which is the first locking piece 53, and the first lid piece 31 is attached to the first wall piece 61 and the first attachment piece 41. Similarly, a hook 80, which is the second locking counterpart included in the second locking means 72 provided in the second lid piece 32, hooks into a step piece 59, which is a second locking piece 54, and the second lid piece 32 is attached to the second wall piece 62 and the second attachment piece 42. In this way, the filter outer frame 15 is attached to the plate 2.

[0078] When the filter outer frame 15 is removed from the plate 2, the user views the plate 2 and the filter outer frame 15 in the Fig. 4 and places a finger of the right hand on the inner surface (the left side surface 71a) in the right-left direction of the first grip piece 73 of the first closure means 71 in the filter outer frame 15. Further, the user places a finger of the left hand on the inner surface (the right side surface 72a) in the left-right direction of the second grip piece 74 of the second closure means 72. Then, the user simultaneously pushes the first grip piece 73 and the second grip piece 74 outward (to the right for the first grip piece 73 and to the left for the second grip piece 74). Thereby, the first closure means 71 is moved to the position indicated by a dashed line 71 in part (a) of Fig. 13, the first fastening piece 75 and a second fastening piece 76 are moved to a side opposite to the direction in which they are pushed, the hook 79 is removed from the step piece 58 of the first attachment piece 41, and the hook 80 is removed from the step piece 59 of the second attachment piece 42. In other words, the first locking counterpart 77 is released from the first locking piece 53 by moving the first grip piece 73 toward the first attachment piece 41 side. The same applies to the second grip piece 74. After the hooks 79 and 80 are removed from the step pieces 58 and 59, respectively, the user holds the lower right and lower left corner portions of the filter outer frame 15 while moving the first grip piece 73 and the second grip piece 74 with his or her fingers, and moves the filter outer frame 15 forward.Since the protrusion 19 of the filter outer frame 15 is inserted into the insertion hole 28 of the plate 2, the lower side of the filter outer frame 15 is tilted forward. Finally, the user pulls the protrusion 19 of the filter outer frame 15 out of the insertion hole 28 of the plate 2. The filter outer frame 15 is removed from the plate 2 through the above operations.

[0079] In the above-described processes of attaching the filter outer frame 15 to the panel 2 and removing the filter outer frame 15 from the panel 2, separate parts such as screws for attaching the filter outer frame 15 to the panel 2 are not required. Therefore, no screw tightening tool, screw tightening process, or the like is required, and the filter outer frame 15 can be easily attached to the panel 2 when assembling the air conditioner 100. Alternatively, the filter outer frame 15 can be easily removed from the indoor unit 1 and attached to the panel 2 during maintenance of the filter outer frame 15.

[0080] Fig. Fig. 11 is a perspective view showing the first attachment piece 41 and the first lid piece 31 in a state in which the filter outer frame 15 is attached to the plate 2 (corresponding to a region B in Fig. 4). When the plate 2 is viewed from the front, the separating rib 46 is arranged inside the cover piece 35, instead of the cover wall piece 36. The hook 79 is hooked into the step piece 58.

[0081] The Fig. 12 is a plan view of the Fig. 11.

[0082] Parts (a) and (b) of the Fig. 13 are cross-sectional views along a line EE in Fig. 12 in the direction between front and rear. The line EE is a cross-sectional line in the direction between right and left, passing through the screw 24 and the screw hole 44. In the part (a) of the Fig. 13, the filter 20 is removed from the filter outer frame 15. In part (b) of the Fig. 13, the filter 20 is attached to the filter outer frame 15.

[0083] The step piece 58 and the hook 79 are assembled using parts (a) and (b) of the Fig. 13 described.

[0084] In parts (a) and (b) of the Fig. 13, a region behind a line F of the plate 2 corresponds to the first attachment piece 41. The concave portion 48 is provided along the recess 47 formed in the first attachment piece 41. The front end of the concave portion 48 is connected to the support surface piece 56, and the support surface piece 56 extends toward a side opposite the screw attachment portion 45 (left side), and the second parting line 46b is provided so as to extend forward from the left end of the support surface piece 56. The step piece 58 is formed by the support surface piece 56 and the second support rib 46b. The screw 24 is screwed into the screw hole 44 and fixes the first attachment piece 41 and the indoor unit 1 (the casing 110). The first attachment piece 41, the screw 24, and the screw hole 44 are covered by the cover piece 31. Although parts (a) and (b) of the Fig. 13 shows a structure in which the tip of the screw 24 is enclosed in the indoor unit 1 (the casing 110), the disclosure herein is not limited to this, and a structure in which the screw 24 penetrates the indoor unit 1 may be implemented. Also in this case, the indoor unit 1 (the casing 110) is formed of a metal, and therefore, no cracks or damage occur on the indoor unit 1 side due to hairline cracking.

[0085] The hook 79 hooks the step piece 58 in a state where the filter outer frame 15 is attached to the plate 2. Furthermore, the gasket 95 provided on the rear surface 35a of the cover piece 35 contacts the first wall piece 61.

[0086] The hook 79 has an inclined surface 84 on the lower end portion side of the first closure piece 53, and the inclined surface 84 is inclined upward toward the first closure piece 53 side. Since the hook 79 has the inclined surface 84, in a case where the tip of the first wall piece 61 contacts the inclined surface 84 when attaching the filter outer frame 15 to the plate 2, the hook 79 is guided by the inclined surface 84 to the outside of the first workpiece 61 (in the direction away from the first attachment piece 41), and thus the filter outer frame 15 is easily attached to the plate 2.

[0087] In a state where the filter outer frame 15 is attached to the plate 2, an overlap tolerance between the hook 79 and the support surface piece 56 in the front-to-back direction is, for example, between 2 mm and 3 mm. With such a configuration, the first locking means 71 can be connected to the position indicated by the dashed line 71' in the case (a) of the Fig.13 by operating the first handle 73 while maintaining the ability to fit the hook 79 into the step piece 58, and the hook 79 can be easily removed from the step piece 58. Further, the concave portion 48 and the hook 79 are spaced apart from each other in the right-left direction. With such a configuration, removal of the hook 49 from the support surface piece 56 and deterioration of the hooking ability of the hook 79 with the first wall piece 61 due to contact between the concave portion 78 and the hook 79 are prevented.

[0088] In this embodiment, the screw 24 and the first attachment piece 41 are covered with the first cover piece 31 and sealed by the first cover piece 31. For this reason, hairline cracking of the first attachment piece 41, to which the screw 24 for fixing the panel 2 to the indoor unit 1 is attached, is prevented, and cracking and damage to the panel 2 at the first attachment piece 41 can be prevented. For this reason, the first attachment piece 41 of the panel 2 of the present disclosure, to which the screw 24 is attached, can be provided in the vicinity of the panel air intake port 13 where indoor air flow is large. In addition, fastening hangers have been previously arranged between the screws 24 and the first attachment piece 41 to prevent cracking and damage to the panel 2, but such metal plates are no longer required, resulting in a reduction in the number of parts.

[0089] In this embodiment, the first attachment piece 41, the second attachment piece 42, and the third attachment piece 43 are covered and sealed with the first cover piece 31, the second cover piece 32, and the third cover piece 33, respectively. Hairline cracking of the first attachment piece 41, the second attachment piece 42, and the third attachment piece 43, to which the screws 24 are attached, is prevented, and cracking of the panel 2 at these locations can be prevented. For this reason, in the panel 2 of the present disclosure, a plurality of attachment pieces to which the screws 24 are attached can be provided in the vicinity of the panel air intake port 13 where internal air flow is large.Even if a plurality of attachment pieces are provided in the vicinity of the plate air intake port 13, further countermeasures against hairline cracking can be taken by attaching a cover to each of the attachment pieces.

[0090] In this embodiment, a part of the suction opening edge portion 25 of the panel 2 is used as the first attachment portion 41. For this reason, the number of elements for providing the first attachment portion 41 can be reduced compared to other cases.

[0091] In this embodiment, a part of the plate peripheral wall 27 is used as the first wall piece 61 provided in the first attachment piece 41. For this reason, the number of members for sealing the first attachment piece 41 can be reduced compared to a case where the first wall piece 61 is formed by a separate member.

[0092] In this embodiment, the first lid piece 31 is provided in the filter outer frame 15. For this reason, the number of elements used in the air conditioner 100 can be reduced compared to a case where the first lid piece 31 is formed by a separate element. Furthermore, in this embodiment, the filter outer frame 15 is attached to the panel 2 and the first lid piece 31 is attached to the first attachment piece 41, and thus, the ease of assembling the air conditioner 100 is improved compared to a case where the first lid piece 31 is formed by a separate element. Similar effects to those described above can also be obtained when a plurality of lid pieces are attached to a plurality of attachment pieces.

[0093] In this embodiment, the first cover piece 31 includes the first locking means 71 which is a substantially rectangular plate-like member, and the first handle piece 73 included in the first locking means 71 and projecting further forward than the cover piece 35 is operated, and accordingly, the hook 79 included in the first locking means 71 can be removed from the step piece 58 provided on the plate 2, thereby improving the operability of removing the filter outer frame 15.

[0094] In this embodiment, the first locking means 71 and the second locking means 72 are provided at both ends of a longitudinal side of the filter outer frame 15. For this reason, the user can operate the first locking means 71 and the second locking means 72 while holding both the right and left ends of the filter outer frame 15, and thus, it is easier to remove the filter outer frame 15 from the plate 2 compared to other cases.

[0095] The present disclosure is not limited to the above-described embodiment and may be appropriately modified without departing from its spirit. For example, in the above-described embodiment, the first wall piece 61 of the first attachment piece 71 is formed by the partition rib 46, the lower plate peripheral wall 27b, and the right plate peripheral wall 27c. However, the shape of the first wall piece 61 is not limited, and the first wall piece 61 may be changed to other shapes as long as the gasket 95 provided in the first lid piece 31 and the first wall piece 61 contact each other when the filter outer frame 15 is attached to the plate 2, and the substantially sealed cavity 80, which is isolated from the outside, is formed by the first attachment piece 41, the first wall piece 61, and the first lid piece 31. The same applies to the shapes of the second wall piece 62 and the third wall piece 63.

[0096] Furthermore, in the above-described embodiment, the first attachment piece 41 and the cover piece 35 have a substantially rectangular shape, but the shape is not limited thereto. The first attachment piece 41 and the cover piece 35 can be changed to other shapes as long as the first lid piece 31 and the first wall piece 61 contact each other when the filter outer frame 15 is attached to the plate 2, and the substantially sealed cavity 80, which is isolated from the outside, is formed by the first attachment piece 41, the first wall piece 61, and the first lid piece 31. The same applies to the second attachment piece 42, the third attachment piece 43, the second lid piece 32, and the third lid piece 33.

[0097] Furthermore, in the above-described embodiment, a configuration was implemented in which the attachment pieces 40 are provided at three locations, that is, at the right and left corner portions of the intake opening edge piece 25 of the panel 2 and the central portion between the right and left central portions of the upper intake opening edge piece 25a, and the filter outer frame 15 includes three lid pieces 60 at locations corresponding to the attachment pieces 40. However, this embodiment is not limited to this, and the air conditioner 100 includes four or more attachment pieces in the panel 2, and the filter outer frame 15 or a member separate from the filter outer frame 15 may include four or more lid pieces corresponding to the attachment pieces. Alternatively, the number of attachment pieces and the number of lid pieces may be set to two or one, as long as the panel 2 can be stably attached to the indoor unit 1.

[0098] Furthermore, in the above-described embodiment, the first lid piece 31 is attached to the first attachment piece 41 by hooking and holding the hook 79 included in the first locking means 71 onto the step piece 58 included in the first wall piece 61, but the present disclosure is not limited thereto. The hook 79 and the step piece 58 may be changed to other shapes as long as the gasket 95 provided in the first lid piece 31 contacts the first wall piece 61 when the filter outer frame 15 is attached to the plate 2, and the substantially sealed cavity 80, which is isolated from the outside, is formed by the first attachment piece 41, the first wall piece 61, the gasket 95, and the first lid piece 31.

[0099] For example, a structure may be implemented in which the first wall piece 61 has a flat side surface instead of the step piece 58, has a recessed portion on the side surface, and a projection such as a convex portion provided in the first closure means 71 is fitted into the recessed portion. List of reference symbols 1 indoor unit 2 plates 3 Suspension 6 lower surface piece 7 Air intake opening 8 Air outlet opening 9 wind deflectors 10 grids 11 Grille air intake opening 12 Plate air outlet opening 13 Plate air intake opening 15 filter outer frame 16 side surface piece 17 carrier hooks 18 Outer frame attachment piece 18a upper outer frame attachment piece 18b lower outer frame attachment piece 18c right outer frame attachment piece 18d left outer frame attachment piece 19 lead 20 filters 21 support piece 22 Grid section 23 Fastening 24 screw 24a screw head 25 Intake opening edge piece 25a upper intake opening edge piece 25b lower intake opening edge piece 25c right intake opening edge piece 25d left intake opening edge piece 26 Grid mounting surface piece 27 Plate perimeter wall 27a upper plate peripheral wall 27b lower plate peripheral wall 27c right slab perimeter wall 27d left slab peripheral wall 28 Insertion opening 29 support rib 30 lid pieces 31 first lid piece 32 second cover piece 33 third cover piece 35 cover piece 36 Cover wall piece 37 outer surface piece 38 cover piece 39 Cover piece 40 attachment piece 41 first attachment piece 41a upper end 41b left end 41c circumference 42 second attachment piece 43 third attachment piece 44 screw hole 45 Screw attachment area 46 Separating rib 46a first dividing rib 46b second separating rib 46c third dividing rib 47 recess 48 concave area 49 Support structure 50 panel wall pieces 51 panel wall piece 53 first closure piece 54 second locking piece 56 support surface piece 58 step piece 59 Steps 60 wall pieces 61 first wall section 62 second wall section 63 third wall section 56 Cover wall piece 66 Cover wall piece 70 closure agents 71 first closure means 72 second closure means 73 first handle 74 second handle 75 first fastening piece 76 second fastening piece 77 first locking counterpart 78 second locking counterpart 79 hooks 80 hooks 81 cavity 82 cavity 83 Cavity 84 inclined surface 85 first guide rib 86 second guide rib 87 third leading rib 88 rear end area 89 tapered surface 90 reinforcement structure 95 Seal 96 Seal 97 Seal 100 ceiling-embedded air conditioning QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2018 / 154765

[0004]

Claims

[1] Air conditioning system, comprising: an indoor unit having an air intake port and an air discharge port, accommodating therein a fan and an indoor heat exchanger, sucking air from the air intake port by operating the fan, and blowing the sucked air out of the air discharge port through the indoor heat exchanger; a plate attached to the indoor unit and having a plate air intake opening at a position where at least a part of the plate overlaps with the air intake opening; a mounting piece provided around the plate air intake opening of the plate and to which screws are attached for fixing the plate to the indoor unit; and a cover piece that covers the screws and seals the attachment piece. [2] Air conditioning system according to claim 1, wherein the attachment piece comprises a wall piece provided protruding on its circumference, wherein the cover piece comprises a substantially rectangular cover piece and a seal provided on a surface of the cover piece facing the wall piece when the cover piece is attached to the plate, and wherein, when the cover piece is attached to the plate, the wall piece contacts the gasket and the attachment piece is sealed by the cover piece, the wall piece and the gasket. [3] An air conditioning system according to claim 1 or 2, further comprising: a filter outer frame which is detachably attached to the plate so as to surround the plate intake opening and to which a filter is detachably attached, wherein the filter outer frame encompasses the cover piece. [4] Air conditioning system according to claim 3, wherein the plate comprises an intake opening edge piece surrounding the plate intake opening and to which the filter outer frame is attached, and wherein at least a part of the attachment piece is formed by the intake opening edge piece. [5] Air conditioning system according to claim 4, wherein the plate comprises a plate peripheral wall surrounding the intake opening edge piece, extending toward a side opposite the indoor unit, and to the inside of which the filter outer frame is attached, and wherein at least a part of the wall piece is formed by the plate peripheral wall. [6] Air conditioning system according to one of claims 1 to 5, wherein the wall piece comprises a closure piece, and wherein the lid piece comprises a closure counterpart that couples to the closure piece and the lid piece is held to the wall piece when the lid piece seals the attachment piece. [7] Air conditioning system according to claim 6, wherein the lid piece comprises a closure means, wherein the closure means comprises a fixing piece extending along a side surface of the wall piece toward the indoor unit in a state in which the filter outer frame is attached to the plate, and a grip piece extending toward a side opposite the fixing piece and protruding from the cover piece, and wherein the locking counterpart is a hook provided on a surface of the fastening piece facing the wall piece. [8] The air conditioner according to claim 6 or 7, wherein the closure piece is a step piece provided in the wall piece and to which the hook is hooked in a state where the filter outer frame is attached to the plate. [9] An air conditioning system according to claim 7 or 8, wherein the coupling of the closure counterpart to the closure piece is released by moving the handle piece toward the attachment piece. [10] Air conditioning system according to one of claims 4 to 9, wherein the plate air intake opening has a substantially rectangular shape, wherein the intake opening edge piece has a rectangular frame shape, wherein the attachment pieces are provided at both ends of a longitudinal side of the intake opening edge piece, and wherein the filter outer frame includes the cover piece at a position where the filter outer frame overlaps the attachment piece when attached to the plate. [11] The air conditioner according to any one of claims 1 to 10, wherein the indoor unit is installed above a ceiling and includes the air intake port and the air discharge port on a surface facing an interior space.

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