Air conditioner

Abstract

An air conditioner includes a rotary shaft member (80) penetrating the hole (H1) of 5 the partition (45), coupling the drive mechanism (70) with the opening-closing member (51), and configured to be rotationally driven by the drive mechanism (70); a tubular bearing member (60) located in the hole (H1) and configured to rotatably support the rotary shaft member (80) therein; and a seal member (95) disposed between an inner peripheral surface forming the hole (H1) and an outer peripheral surface of the bearing member (60).20 25 20 12 95 24 F eb 2 02 5 A I R C O N D I T I O N E R A B S T R A C T 2 0 2 5 2 0 1 2 9 5 2 4 F e b 2 0 2 5 A n a i r c o n d i t i o n e r i n c l u d e s a r o t a r y s h a f t m e m b e r ( 8 0 ) p e n e t r a t i n g t h e h o l e ( H 1 ) o f 5 t h e p a r t i t i o n ( 4 5 ) , c o u p l i n g t h e d r i v e m e c h a n i s m ( 7 0 ) w i t h t h e o p e n i n g - c l o s i n g m e m b e r ( 5 1 ) , a n d c o n f i g u r e d t o b e r o t a t i o n a l l y d r i v e n b y t h e d r i v e m e c h a n i s m ( 7 0 ) ; a t u b u l a r b e a r i n g m e m b e r ( 6 0 ) l o c a t e d i n t h e h o l e ( H 1 ) a n d c o n f i g u r e d t o r o t a t a b l y s u p p o r t t h e r o t a r y s h a f t m e m b e r ( 8 0 ) t h e r e i n ; a n d a s e a l m e m b e r ( 9 5 ) d i s p o s e d b e t w e e n a n i n n e r p e r i p h e r a l s u r f a c e f o r m i n g t h e h o l e ( H 1 ) a n d a n o u t e r p e r i p h e r a l s u r f a c e o f t h e b e a r i n g m e m b e r ( 6 0 ) . A I R C O N D I T I O N E R A B S T R A C T 2 0 2 5 2 0 1 2 9 5 2 4 F e b 2 0 2 5 1 / 9 FIG. 1 10 20 11 30 24 12 22 31 21 32 C C2 25 C1 23 13 20 25 20 12 95 24 F eb 2 02 5 1 / 9 F I G . 1 2 4 F e b 2 0 2 5 2 0 1 2 9 5 2 0 2 5 1 0 2 0 1 1 3 0 2 4 1 2 2 2 3 1 2 1 3 2 c C 2 2 5 C 1 X 2 3 1 3 2 4 F e b 2 0 2 5 2 0 1 2 9 5 2 0 2 5 1 0 1 1 3 0 2 4 1 2 2 2 3 1 2 1 3 2 c C 2 2 5 C 1 X 2 3 1 3

Description

TITLE AIR CONDITIONER 5 TECHNICAL FIELD

[0001] The present disclosure relates to an air conditioner. 10 BACKGROUND ART

[0002] Patent Document 1 discloses an air conditioner. This air conditioner includes a casing with an outlet port, a shutter that opens and closes a flow path communicating with the outlet port, a rotary shaft coupled to the shutter, and a motor that rotates the rotary shaft. A space for 15 housing the motor and the flow path provided with the shutter are separated by a partition. The rotary shaft penetrates a hole of the partition, and couples the shutter with the motor. This configuration might allow the air in or around the flow path to leak to the space through the hole. Thus, the air conditioner of Patent Document 1 has a labyrinth seal structure in a portion around the hole, thereby reducing the leakage of air. 20 CITATION LIST PATENT DOCUMENT

[0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2010-78273 25 2025201295   24 Feb 2025 SUMMARY

[0004] As a measure against the leakage of air as disclosed in Patent Document 1, a seal member made of a resin or the like can be provided in or around the space so as to cover the 5 clearance of the hole of the partition. Specifically, the seal member is provided on the surface of the partition facing the housing space of the motor so as to close the clearance of the hole. However, this configuration might allow the seal member and the rotating rotary shaft to come into contact with each other. If the seal member and the rotary shaft come into contact with each other, the seal member is caught in the rotary shaft, or the torque of the rotary shaft increases. 10 Thus, the state of the shutter (an opening-closing member) cannot be stably switched. [0004a] It is an object of the present invention to substantially overcome, or at least ameliorate, one or more disadvantages of existing arrangements, or provide a useful alternative.

[0005] 15           Some embodiments of the present disclosure are intended to reduce contact between a rotary shaft coupled to an opening-closing member and a seal member. [0005a] According to one aspect of the present invention, there is provided an air conditioner including: 20           a casing including an air flow path; a partition separating a first flow path in the air flow path and a first space and including a hole; a drive mechanism disposed in the first space; an opening-closing member configured to open and close the first flow path; 25            a rotary shaft member penetrating the hole of the partition, coupling the drive 2025201295   24 Feb 2025 mechanism with the opening-closing member, and configured to be rotationally driven by the drive mechanism; a tubular bearing member located in the hole and configured to rotatably support the rotary shaft member therein; and 5           a seal member disposed between an inner peripheral surface forming the hole and an outer peripheral surface of the bearing member.

[0006] A first aspect is directed to an air conditioner (10). The air conditioner (10) includes a casing (31) including an air flow path (P); a partition (45) separating a first flow path (41) in 10 the air flow path (P) and a first space (S1) and including a hole (H1); an opening-closing member (51) configured to open and close the first flow path (41); a drive mechanism (70) disposed in the first space (S1); a rotary shaft member (80) penetrating the hole (H1) of the partition (45), coupling the drive mechanism (70) with the opening-closing member (51), and configured to be rotationally driven by the drive mechanism (70); a tubular bearing member 15   (60) located in the hole (H1) and rotatably supporting the rotary shaft member (80) therein, and a seal member (95) disposed between an inner peripheral surface forming the hole (H1) and an outer peripheral surface of the bearing member (60).

[0007] In the first aspect, the tubular bearing member (60) is provided inside the partition (45). 20 The bearing member (60) rotatably supports the rotary shaft member (80) therein. The seal member (95) is disposed between the inner peripheral surface of the hole (H1) and the outer peripheral surface of the bearing member (60). The seal member (95) reduces the leakage of air in the first flow path (41) to the first space (S1) through a clearance between the inner peripheral surface forming the hole (H1) and the outer peripheral surface of the bearing member (60). The 25 bearing member (60) is provided between the seal member (95) and the rotary shaft member 2025201295   24 Feb 2025 (80), thus enabling the rotating rotary shaft member (80) and the seal member (95) to come less into contact with each other.

[0008] A second aspect is an embodiment of the first aspect. In the second aspect, the air 5 conditioner (10) further includes a housing member (55) disposed in the first space (S1) and forming a housing chamber (S2) that houses the drive mechanism (70), The bearing member (60) extends from the housing chamber (S2) to the hole (H1).

[0009] In the second aspect, the tubular bearing member (60) extends from the housing 10 chamber (S2) to the hole (H1). Thus, even if the air in the first flow path (41) leaks to a clearance between the bearing member (60) and the rotary shaft member (80), the air is sent to the housing chamber (S2) of the housing member (55). This can reduce the outflow of air in the first flow path (41) to the first space (S1) (the outside of the housing member (55)). As a result, generation of condensation water in or around the first space (S1) can be reduced. 15

[0010] A third aspect is an embodiment of the second aspect. In the third aspect, the drive mechanism (70) includes a motor (71) including an output shaft (71b), and a gear mechanism (G) configured to transmit rotative force of the output shaft (71b) of the motor (71) to the rotary shaft member (80). 20

[0011] In the third aspect, the position of the motor (71) and the position of the rotary shaft member (80) can be displaced in the radial direction of the rotary shaft member (80). As a result, the air sent into the housing member (55) through the clearance between the bearing member (60) and the rotary shaft member (80) is less likely to come into contact with the motor (71), 25 thus reducing generation of condensation water around the motor (71). 2025201295   24 Feb 2025

[0012] A fourth aspect is an embodiment of the third aspect. In the fourth aspect, an axis center of the output shaft (71b) of the motor (71) is located higher than an axis center of the rotary shaft member (80). 5

[0013] In the fourth aspect, even if air leaks from the inside of the bearing member (60) into the housing member (55) and then condensation water is generated in the housing member (55), this condensation water less appears on the motor (71).

[0014] 10            A fifth aspect is an embodiment of the third or fourth aspect. In the fifth aspect, the gear mechanism (G) includes a driven gear (83) provided on the rotary shaft member (80).

[0015] In the fifth aspect, the driven gear (83) is provided on the rotary shaft member (80).

[0016] 15            A sixth aspect is an embodiment of any one of the second to fifth aspects. In the sixth aspect, the rotary shaft member (80) includes a rotary shaft body (81), and a flange (90) extending outward in a radial direction from the rotary shaft body (81) so as to close an opening (61) which is an opening of the bearing member (60) near the drive mechanism (70).

[0017] 20            In the sixth aspect, the flange (90) of the rotary shaft body (81) closes the opening (61) which is an opening of the bearing member (60) near the drive mechanism (70). This can reduce the leakage of air in the rotary shaft member (80) into the housing member (55).

[0018] A seventh aspect is an embodiment of the sixth aspect. In the seventh aspect, the air 25 conditioner (10) further includes a labyrinth seal structure (L) configured to seal a clearance 2025201295   24 Feb 2025 between the bearing member (60) and the flange (90).

[0019] In the seventh aspect, the leakage of air in the rotary shaft member (80) into the housing member (55) through the clearance between the bearing member (60) and the flange (90) can 5 be reduced.

[0020] An eighth aspect is an embodiment of any one of the first to seventh aspects. In the eighth aspect, the bearing member (60) includes a first bearing portion (63) located near an opening-closing member (51) and provided in sliding contact with the rotary shaft member (80), 10 and a second bearing portion (64) located near the drive mechanism (70) and provided in sliding contact with the rotary shaft member (80).

[0021] In the eighth aspect, the bearing member (60) supports the rotary shaft member (80) by the first bearing portion (63) and the second bearing portion (64). This can reduce 15 misalignment of the axis center of the rotary shaft member (80), and also can reduce the frictional resistance of the rotary shaft member (80).

[0022] A ninth aspect is an embodiment of any one of the second to eighth aspects. In the ninth aspect, the bearing member (60) includes an intermediate portion (66) located outside the 20 hole (H1) of the partition (45) and outside the housing member (55), and the seal member (95) covers a periphery of the intermediate portion (66).

[0023] In the ninth aspect, the seal member (95) can thermally insulate the bearing member (60). Thus, air flows through the bearing member (60), thereby reducing generation of 25 condensation water on the outside surface of the bearing member (60). 2025201295   24 Feb 2025

[0024] A tenth aspect is an embodiment of any one of the first to ninth aspects. In the tenth aspect, the partition (45) includes a partition body (45a), and a tubular portion (45b) extending from the partition body (45a) in an axial direction of the rotary shaft member (80) and including 5 the first hole (H1), and the seal member (95) is disposed between an inner peripheral surface of the tubular portion (45b) and the outer peripheral surface of the bearing member (60).

[0025] In the tenth aspect, the seal length of the seal member (95) is longer in the axial direction of the bearing member (60), and thus the seal performance of the seal member (95) 10 can be improved.

[0026] An eleventh aspect is an embodiment of any one of the first to tenth aspects. In the eleventh aspect, the seal member (95) is a flexible sheet member.

[0027] 15            In the eleventh aspect, the seal member (95) can be disposed between the partition (45) and the bearing member (60) while being deformed into any shape.

[0028] A twelfth aspect is an embodiment of any one of the first to eleventh aspects. In the twelfth aspect, the air conditioner (10) further includes a heat exchanger (32) disposed in the 20 air flow path (P) and functioning as a radiator and an evaporator. The casing (31) includes a first outlet port (37) through which air in the air flow path (P) is blown into a target space (I), and a second outlet port (40) which is located above the first outlet port (37) and through which the air in the air flow path (P) is blown into the target space (I). The first flow path (41) is the first outlet port (37) or a flow path continuous with the first outlet port (37). 25

[0029] 2025201295   24 Feb 2025 In the twelfth aspect, the air cooled by the heat exchanger (32) functioning as an evaporator can be supplied from the second outlet port (40) to the target space (I) while the opening-closing member (51) closes the first flow path (41). This operation enables a user in the target space (I) to feel less cold draft. In this operation, the first flow path (41) near the first 5 outlet port (37) is closed, and thus cold air is likely to leak from the first flow path (41) to the first space (S1). The leakage of cold air leads to more generation of condensation water around the first space (S1). On the other hand, in the twelfth aspect, the seal member (95) can reduce the leakage of air. Further, the seal member (95) and the rotating rotary shaft member (80) come less into contact with each other. 10 BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG. 1 is a schematic piping system diagram of a refrigerant circuit of an air conditioner. FIG. 2 is a perspective view of the appearance of an indoor unit. 15            FIG. 3 is a front side view of the inside of the indoor unit. FIG. 4 is a sectional view taken along line A-A of FIG. 3. FIG. 5 is a perspective view of the appearance of a motor case. FIG. 6 is a right side view of the inside of the motor case without a second case portion. FIG. 7 is a sectional view taken along line B-B of FIG. 6 with the second case portion. 20           FIG. 8 is a perspective view of a rotary shaft member. FIG. 9 is an enlarged view of a portion surrounded by line C of FIG. 7. DESCRIPTION OF EMBODIMENTS

[0031] 25            Embodiments of the present disclosure will be described in detail below with reference 2025201295   24 Feb 2025 to the drawings. The present disclosure is not limited to the embodiments below, and various changes can be made within the scope without departing from the technical concept of the present disclosure. Since each of the drawings is intended to illustrate the present disclosure conceptually, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for 5 ease of understanding.

[0032] (1) General Configuration of Air Conditioner As illustrated in FIG. 1, an air conditioner (10) includes an outdoor unit (20) and an indoor unit (30). The air conditioner (10) is a separation-type air conditioner in which the 10 outdoor unit (20) and the indoor unit (30) are connected to each other via two connection pipes (12, 13). This connection forms a refrigerant circuit (11). The refrigerant circuit (11) is filled with a refrigerant. The refrigerant circuit (11) performs a refrigeration cycle. The air conditioner (10) conditions air in an indoor space (I) as a target space. Specifically, the air conditioner (10) performs a cooling operation and a heating operation. 15

[0033] (2) Outdoor Unit The outdoor unit (20) is placed outdoors. The outdoor unit (20) includes a compressor (21), an outdoor heat exchanger (22), an expansion valve (23), and a four-way switching valve (24), each connected to the refrigerant circuit (11). The outdoor unit (20) includes an outdoor 20 fan (25).

[0034] The compressor (21) compresses a sucked refrigerant. The compressor (21) discharges a compressed refrigerant. The outdoor heat exchanger (22) exchanges heat between the refrigerant flowing therethrough and the outdoor air transported from the outdoor fan (25). The 25 outdoor fan (25) transports the outside air (outdoor air) to the outdoor heat exchanger (22). The 2025201295   24 Feb 2025 expansion valve (23) decompresses the refrigerant. The expansion valve (23) is an electronic expansion valve whose opening degree is adjustable. The four-way switching valve (24) switches the flow path of the refrigerant circuit (11). The four-way switching valve (24) switches between a first state indicated by a solid line in FIG. 1 and a second state indicated by 5 a broken line in FIG. 1. The four-way switching valve (24) is in the first state during the cooling operation, and is in the second state during the heating operation.

[0035] (3) Indoor Unit The indoor unit (30) will be described with reference to FIGS. 2 to 4. In the following 10 description, the terms indicating “top”, “bottom”, “front”, “back”, “right”, and “left” are used with reference to the directions illustrated in FIGS. 2 to 4 in principle.

[0036] The indoor unit (30) includes a casing (31), an indoor heat exchanger (32), a bell mouth (33), an indoor fan (34), a drain pan (35), an electrical component box (36), and a damper unit 15   (50). The indoor unit (30) is placed on the floor of the indoor space (I). The indoor unit (30) is a floor-standing-type indoor unit.

[0037] (3-1) Casing The casing (31) is substantially formed in the shape of a rectangular parallelepiped box. 20 The casing (31) includes a front plate (31a), a back plate (31b), a first side plate (31c), a second side plate (31d), a bottom plate (31e), and a top plate (31f). The front plate (31a) is formed on the front side of the casing (31). The back plate (31b) is formed on the back side of the casing (31). The first side plate (31c) is formed on the right side of the casing (31). The second side plate (31d) is formed on the left side of the casing (31). The bottom plate (31e) is formed on the 25 lower side of the casing (31). The top plate (31f) is formed on the upper side of the casing (31). 2025201295   24 Feb 2025

[0038] A first outlet port (37) is formed in a lower portion of the front plate (31a). In other words, the first outlet port (37) is located in a lower portion of the casing (31). The first outlet port (37) is an elongated hole extending in the right-left direction. As illustrated in FIG. 4, the 5 first outlet port (37) is provided with a plurality of vertical blades (38) arranged in the right-left direction. The plurality of vertical blades (38) horizontally adjusts the direction of air blown out of the first outlet port (37) into the indoor space (I).

[0039] The front plate (31a) is provided with a plurality of suction ports (39). The suction 10 ports (39) are located above the first outlet port (37). The suction ports (39) are formed as a plurality of slits extending in the right-left direction. The plurality of suction ports (39) are arranged in the top-bottom direction.

[0040] The top plate (31f) is provided with a second outlet port (40). In other words, the 15 second outlet port (40) is located in an upper portion of the casing (31). The second outlet port (40) is located higher than the first outlet port (37). The second outlet port (40) is an elongated long hole extending in the right-left direction. As illustrated in FIG. 4, the second outlet port (40) is provided with one horizontal blade (40a). The horizontal blade (40a) swings up and down to vertically adjust the direction of air blown out of the second outlet port (40) into the 20 indoor space (I).

[0041] The casing (31) includes an air flow path (P). The air flow path (P) is a flow path extending from the plurality of suction ports (39) to the first outlet port (37) and the second outlet port (40). The air flow path (P) includes a lower flow path (41) and an upper flow path 25   (42). The lower flow path (41) is a flow path extending from downstream of the indoor fan (34) 2025201295   24 Feb 2025 to the first outlet port (37). The lower flow path (41) is located in a lower portion of the casing (31). The upper flow path (42) is a flow path extending from downstream of the indoor fan (34) to the second outlet port (40). The upper flow path (42) is located in an upper portion of the casing (31). In this embodiment, the lower flow path (41) forms a first flow path. 5

[0042] (3-2) Indoor Heat Exchanger The indoor heat exchanger (32) is disposed in the air flow path (P). Specifically, the indoor heat exchanger (32) is disposed behind the front plate (31a). The indoor heat exchanger (32) exchanges heat between the refrigerant and the indoor air transported by the indoor fan 10   (34). The indoor heat exchanger (32) is a fin-and-tube-type indoor heat exchanger. The indoor heat exchanger (32) functions as a radiator and an evaporator. The indoor heat exchanger (32) functioning as a radiator heats air in the air flow path (P). The indoor heat exchanger (32) functioning as an evaporator cools air in the air flow path (P).

[0043] 15            (3-3) Bell mouth The bell mouth (33) in FIG. 4 is disposed behind the indoor heat exchanger (32). The bell mouth (33) guides the air having passed through the indoor heat exchanger (32) to the indoor fan (34).

[0044] 20            (3-4) Indoor Fan The indoor fan (34) in FIG. 4 is disposed behind the bell mouth (33). The indoor fan (34) is a centrifugal fan, specifically a turbo fan. The indoor fan (34) includes a fan motor (34a), a fan drive shaft (34b) rotationally driven by the fan motor (34a), and an impeller (34c) coupled to the fan drive shaft (34b). The fan drive shaft (34b) extends in the front-back direction. When 25 the indoor fan (34) is in operation, the air having passed through the bell mouth (33) turns 2025201295   24 Feb 2025 outward in the radial direction of the impeller (34c). The air turning downward from the indoor fan (34) passes through the lower flow path (41), and is blown out of the first outlet port (37) into the indoor space (I). The air turning upward from the indoor fan (34) passes through the upper flow path (42), and is blown out of the second outlet port (40) into the indoor space (I). 5

[0045] (3-5) Drain Pan The drain pan (35) in FIGS. 3 and 4 is disposed below the indoor heat exchanger (32). The drain pan (35) receives condensation water generated around the indoor heat exchanger (32). The drain pan (35) extends right and left so as to overlap with the whole of the indoor heat 10 exchanger (32) in the top-bottom direction.

[0046] (3-6) Electrical Component Box The electrical component box (36) in FIG. 3 is disposed at the upper right end in the casing (31). The electrical component box (36) houses a predetermined electrical component. 15 The electrical component includes a control board for controlling a device such as the indoor fan (34) and receiving signals from various sensors.

[0047] (3-7) Partition and Heat Insulator As illustrated in FIG. 3, a partition (45) is provided in a lower portion of the casing 20   (31). The partition (45) is located near the first side plate (31c) in the lower portion of the casing (31). The partition (45) forms a vertical wall extending in the top-bottom direction. The partition (45) separates the inside of the casing (31) into the lower flow path (41) and a first space (S1). The left surface of the partition (45) serves as an inner surface defining the lower flow path (41). The right surface of the partition (45) serves as an outer surface defining the first space (S1). 25

[0048] 2025201295   24 Feb 2025 The partition (45) includes a partition body (45a) and a tubular portion (45b) extending horizontally (or in the first direction described in detail later) from the partition body (45a). The tubular portion (45b) extends rightward (or toward the drive mechanism (70) described in detail later) from the partition body (45a). The tubular portion (45b) includes a first hole (H1) 5 penetrating the partition (45) in the thickness direction. The first hole (H1) forms a circular columnar space therein.

[0049] A heat insulator (46) is provided near the first space (S1) in a lower portion of the casing (31). The heat insulator (46) covers the outer surface (right surface) of the partition (45). 10 The heat insulator (46) is made of a resin material, such as polyethylene, having heat insulating properties. The heat insulator (46) includes a second hole (H2). The second hole (H2) forms a circular columnar space therein. The inner diameter of the second hole (H2) is larger than the inner diameter of the first hole (H1). The axis center of the second hole (H2) and the axis center of the first hole (H1) substantially match each other. 15

[0050] The partition (45) of this embodiment is formed integrally with the drain pan (35), but may be formed integrally with another member such as the casing (31) or may be formed as an independent component.

[0051] 20          (4) Damper Unit The damper unit (50) will be described in detail with reference to FIGS. 3 to 9. The damper unit (50) is a unit for opening and closing the lower flow path (41) as the first flow path. The damper unit (50) is disposed in a lower portion of the casing (31). The damper unit (50) includes a damper (51), a motor case (55), the drive mechanism (70), and a rotary shaft member 25   (80). The damper (51) is disposed in the lower flow path (41), and opens and closes the lower 2025201295   24 Feb 2025 flow path (41). The motor case (55) and the drive mechanism (70) are disposed in the first space (S1). The motor case (55) houses the drive mechanism (70). The drive mechanism (70) is a drive source that drives the damper (51).

[0052] 5            In the following description, the first direction corresponds to the axial direction of the rotary shaft member (80). One end side of the first direction refers to the side of the first direction near the drive mechanism (70), and the other end side of the first direction refers to the side of the first direction near the damper (51).

[0053] 10          (4-1) Damper The damper (51) in FIGS. 3 and 4 is an example of an opening-closing member. The damper (51) is formed in a plate shape extending over the whole area of the lower flow path (41) in the right-left direction. The damper (51) is coupled to the drive mechanism (70) via the rotary shaft member (80). The damper (51) is moved by the drive mechanism (70) between an 15 open state indicated by a solid line in FIG. 4 and a closed state indicated by a two-dot-chain line in FIG. 4. When the damper (51) is in the closed state, the lower flow path (41) is closed and air is disallowed to flow in the lower flow path (41). When the damper (51) is in the open state, the lower flow path (41) is opened and air is allowed to flow in the lower flow path (41).

[0054] 20           (4-2) Motor Case The motor case (55) in FIGS. 5 to 7 is located opposite to the damper (51) with respect to the partition (45). The motor case (55) is formed in a hollow shape of which the shorter direction is the first direction. The motor case (55) includes a first case portion (56) and a second case portion (57) located closer to the one end side of the first direction than the first case 25 portion (56). The first case portion (56) is formed in a box shape, the one end side of which in 2025201295   24 Feb 2025 the first direction is opened. The second case portion (57) is formed in a box shape, the other end side of which in the first direction is opened. The second case portion (57) is detachably attached to the opening of the first case portion (56). In a state in which the second case portion (57) is attached to the first case portion (56), a housing chamber (S2) housing the drive 5 mechanism (70) is formed in the motor case (55).

[0055] (4-2-1) First Case Portion As illustrated in FIG. 7, the first case portion (56) includes a case side plate (56a) and a bearing member (60) extending leftward from the case side plate (56a). The case side plate 10   (56a) is fixed to the partition (45) via a stay (58) at a position spaced apart by a predetermined distance from the partition (45).

[0056] The bearing member (60) rotatably supports the rotary shaft member (80) therein. The bearing member (60) is formed in a cylindrical shape, both ends of which in the axial direction 15 is opened. The bearing member (60) extends from the case side plate (56a) to the other end side of the first direction. The bearing member (60) extends from the housing chamber (S2) of the motor case (55) to the first hole (H1). Specifically, the bearing member (60) extends to the inside of the second hole (H2) of the heat insulator (46) and the inside of the first hole (H1) of the partition (45). The tip end of the bearing member (60) reaches the opening end of the first 20 hole (H1) near the damper (51). The outer diameter of the bearing member (60) is smaller than the inner diameter of each of the first hole (H1) and the second hole (H2). The axis center of the bearing member (60) substantially matches the axis center of each of the first hole (H1) and the second hole (H2).

[0057] 25            A first opening (61) is formed in one end portion of the bearing member (60) in the 2025201295   24 Feb 2025 first direction. A second opening (62) is formed in the other end portion of the bearing member (60) in the first direction. The first opening (61) and the second opening (62) are circular holes.

[0058] In this embodiment, the bearing member (60) and the motor case (55) are integrated 5 together. However, the bearing member (60) and the motor case (55) may be separated from each other. The structure of the bearing member (60) will be described in detail later.

[0059] (4-2-2) Second Case Portion As illustrated in FIG. 5, the second case portion (57) includes a motor housing portion 10   (57a) and a gear housing portion (57b). The motor housing portion (57a) and the gear housing portion (57b) are formed in a rear portion of the second case portion (57). The motor housing portion (57a) and the gear housing portion (57b) are formed in a circular columnar shape extending rightward from a base portion of the second case portion (57). The motor housing portion (57a) is located in front of the gear housing portion (57b). The motor housing portion 15   (57a) is located higher than the gear housing portion (57b). The diameter of the motor housing portion (57a) is smaller than the diameter of the gear housing portion (57b).

[0060] As illustrated in FIGS. 7 and 9, the second case portion (57) is provided with an inner bearing portion (57c) extending to the other end side of the first direction. The inner bearing 20 portion (57c) is formed in a circular columnar shape of which the axial direction is the first direction.

[0061] (4-3) Drive Mechanism As illustrated in FIGS. 6 and 7, the drive mechanism (70) includes a motor (71) and a 25 drive gear (72). The motor (71) is disposed in the motor housing portion (57a), and the drive 2025201295   24 Feb 2025 gear (72) is disposed in the gear housing portion (57b). The housing chamber (S2) of the motor case (55) is a space including the inside of the motor housing portion (57a) and the inside of the gear housing portion (57b).

[0062] 5            The motor (71) is, for example, a stepping motor. The motor (71) includes a motor body (71a) and an output shaft (71b) extending in the first direction from the motor body (71a). The output shaft (71b) of this embodiment extends from the motor body (71a) to the one end side of the first direction. The axis center of the output shaft (71b) of this embodiment is eccentric rearward to the axis center of the motor body (71a). A pinion (71c) is provided at one 10 end (right end) of the output shaft (71b). A plurality of teeth are formed on an outer peripheral portion of the pinion (71c).

[0063] The drive gear (72) is disposed behind the output shaft (71b). The drive gear (72) includes a circular columnar barrel (72a) extending in the first direction; a first gear portion 15   (72b) provided at one end of the barrel (72a) in the first direction; and a second gear portion (72c) provided at the other end of the barrel (72a) in the first direction. The first gear portion (72b) is adjacent to the pinion (71c) in the front-back direction. A plurality of teeth that meshes with the teeth of the pinion (71c) are formed on an outer peripheral portion of the first gear portion (72b). A plurality of teeth are formed on an outer peripheral portion of the second gear 20 portion (72c).

[0064] (4-4) Rotary Shaft Member As illustrated in FIGS. 7 to 9, the damper unit (50) includes the rotary shaft member (80). The rotary shaft member (80) penetrates the first hole (H1) of the partition (45), and 25 couples the drive mechanism (70) with the damper (51). The rotary shaft member (80) is 2025201295   24 Feb 2025 rotatably supported inside the bearing member (60). The rotary shaft member (80) is rotationally driven by the drive mechanism (70).

[0065] The rotary shaft member (80) includes a rotary shaft body (81) extending in the first 5 direction; a flange (90) provided near one end of the rotary shaft body (81) in the first direction; and an engagement portion (82) provided at the other end of the rotary shaft body (81) in the first direction.

[0066] The rotary shaft body (81) is formed in a tubular shape that has a bottom and that 10 includes a shaft opening (81a) on the one end side of the first direction. The inner bearing portion (57c) described above is fitted in the shaft opening (81a) with a slight clearance therebetween. In other words, the clearance is formed between the outer peripheral surface of the inner bearing portion (57c) and the inner peripheral surface of the rotary shaft body (81).

[0067] 15            As illustrated in FIG. 8, the engagement portion (82) extends in the first direction from the rotary shaft body (81) to the damper (51). The engagement portion (82) includes a plurality of first raised portions (82a) protruding outward in the radial direction and one second raised portion (82b) protruding outward in the radial direction and having a longer length in the radial direction than the first raised portion (82a). The second raised portion (82b) serves as a key that 20 fits in a key groove (not shown) of the damper (51). The second raised portion is fitted in the key groove, thereby coupling the rotary shaft member (80) with the damper (51).

[0068] The flange (90) extends outward in the radial direction from the rotary shaft body (81) so as to close the second opening (62) which is the opening of the bearing member (60) near 25 the drive mechanism (70). A driven gear (83) is provided on the one end side of the flange (90) 2025201295   24 Feb 2025 in the first direction. The driven gear (83) is formed in a substantially arc shape at part of an outer peripheral portion of the flange (90). A plurality of teeth that mesh with the teeth of the second gear portion (72c) of the drive gear (72) are formed on an outer peripheral portion of the driven gear (83). The driven gear (83) is formed by resin molding integrally with the rotary 5 shaft body (81). The driven gear (83) may be a separate component fixed to the rotary shaft body (81), or may not be made of a resin. The rotary shaft body (81) may not be made of a resin.

[0069] In this embodiment, the rotative force of the output shaft (71b) of the motor (71) is transmitted to the pinion (71c), the first gear portion (72b), the second gear portion (72c), and 10 the driven gear (83) in sequence, and thus the rotary shaft member (80) rotates. The pinion (71c), the first gear portion (72b), the second gear portion (72c), and the driven gear (83) form a gear mechanism (G) that transmits the rotative force of the output shaft (71b) of the motor (71) to the rotary shaft member (80). The gear mechanism (G) may have a configuration without the drive gear (72). In this configuration, the pinion (71c) of the output shaft (71b) meshes with the 15 driven gear (83) of the rotary shaft member (80).

[0070] As illustrated in FIGS. 7 to 9, the flange (90) includes a disc-shaped base portion (91), a first annular raised portion (92) in an annular shape, and a second annular raised portion (93) in an annular shape. The axis center of each of the base portion (91), the first annular raised 20 portion (92), and the second annular raised portion (93) substantially matches the axis center of the rotary shaft body (81).

[0071] The base portion (91) is continuous with the outer peripheral surface of the rotary shaft body (81). The first annular raised portion (92) protrudes from an outer peripheral portion of 25 the surface of the base portion (91) on the other end side of the first direction to the other end 2025201295   24 Feb 2025 side of the first direction. The second annular raised portion (93) is continuous with the outer peripheral surface of the first annular raised portion (92), and further protrudes to the other end side of the first direction.

[0072] 5            (4-5) First Bearing Portion and Second Bearing Portion As illustrated in FIGS. 7 and 9, the bearing member (60) includes a first bearing portion (63) and a second bearing portion (64). The first bearing portion (63) is located near the damper (51), and the second bearing portion (64) is located near the drive mechanism (70). The first bearing portion (63) and the second bearing portion (64) are located apart from each other in 10 the first direction.

[0073] The first bearing portion (63) is provided at the other end portion of the bearing member (60) in the first direction. The first bearing portion (63) is formed in an annular shape protruding inward in the radial direction from the body of the bearing member (60) to the rotary 15 shaft member (80). The first bearing portion (63) is in contact with the outer peripheral surface of the rotary shaft member (80), and rotatably supports the rotary shaft member (80). The first bearing portion (63) forms a radial sliding bearing that is in sliding contact with the rotary shaft member (80).

[0074] 20           The second bearing portion (64) is provided at one end portion of the bearing member (60) in the first direction. The second bearing portion (64) is formed in an annular shape protruding from the case side plate (56a) to the one end side of the first direction. The second bearing portion (64) is in contact with the inner peripheral surface of the second annular raised portion (93) of the rotary shaft member (80), and rotatably supports the rotary shaft member 25   (80). The second bearing portion (64) forms a radial sliding bearing that is in sliding contact 2025201295   24 Feb 2025 with the rotary shaft member (80). In this manner, in this embodiment, the rotary shaft member (80) is supported at two points, and thus misalignment of the center of the rotary shaft member (80) can be reduced. The bearing member (60) may have three or more bearing portions.

[0075] 5            A cylindrical intermediate clearance (65) is formed between the inner peripheral surface of the bearing member (60) and the rotary shaft body (81). Thus, the bearing member (60) and the rotary shaft body (81) are not in contact with each other at a position corresponding to the intermediate clearance (65). As a result, sliding resistance between the bearing member (60) and the rotary shaft member (80) can be reduced, and a load can be reduced on the motor 10    (71).

[0076] (5) Controller The air conditioner (10) includes a controller (C). The controller (C) includes an outdoor controller (C1) and an indoor controller (C2). The outdoor controller (C1) and the 15 indoor controller (C2) are communicable with each other in a wireless or wired manner. The outdoor controller (C1) and the indoor controller (C2) include a micro controller unit (MCU), an electric circuit, and an electronic circuit. The MCU includes a central processing unit (CPU), a memory, and a communication interface. The memory stores various programs that is executed by the CPU. 20

[0077] The outdoor controller (C1) is provided in the outdoor unit (20). The outdoor controller (C1) controls the number of rotations of the compressor (21), the number of rotations of the outdoor fan (25), the opening degree of the expansion valve (23), and the like.

[0078] 25            The indoor controller (C2) is provided in the indoor unit (30). The indoor controller 2025201295   24 Feb 2025 (C2) controls the number of rotations of the indoor fan (34) and the forward rotation and reverse rotation of the motor (71).

[0079] (6) Operation 5            The air conditioner (10) performs the cooling operation and the heating operation.

[0080] (6-1) Cooling Operation In the cooling operation, the controller (C) operates the compressor (21), the outdoor fan (25), and the indoor fan (34); turns the four-way switching valve (24) into the first state; 10 and adjusts the opening degree of the expansion valve (23). The controller (C) controls the motor (71) to turn the damper (51) into the closed state indicated by the two-dot-chain line in FIG. 4. The refrigerant circuit (11) in the cooling operation performs a refrigeration cycle (cooling cycle) in which the outdoor heat exchanger (22) functions as a radiator (precisely a condenser) and the indoor heat exchanger (32) functions as an evaporator. 15

[0081] In the indoor unit (30), the air in the indoor space (I) flows into the air flow path (P) through the suction ports (39). This air is cooled in the indoor heat exchanger (32), then flows through the upper flow path (42), and is blown out of the second outlet port (40) toward the ceiling side of the indoor space (I). In the cooling operation, the lower flow path (41) is closed 20 by the damper (51), and thus the cooled air is not blown out of the first outlet port (37) to the vicinity of the floor of the indoor space (I). Accordingly, a person in the indoor space (I) feels less cold draft. In the cooling operation, the damper (51) is not necessarily in the closed state. In the cooling operation, the controller (C) may switch the damper (51) between the open state and the closed state in response to a user's operation. 2025201295   24 Feb 2025 (6-2) Heating Operation In the heating operation, the controller (C) operates the compressor (21), the outdoor fan (25), and the indoor fan (34); turns the four-way switching valve (24) into the second state; and adjusts the opening degree of the expansion valve (23). The controller (C) controls the 5 motor (71) to turn the damper (51) into the open state indicated by the solid line in FIG. 4. The refrigerant circuit (11) in the heating operation performs a refrigeration cycle (heating cycle) in which the indoor heat exchanger (32) functions as a radiator (precisely a condenser) and the outdoor heat exchanger (22) functions as an evaporator.

[0083] 10            In the indoor unit (30), the air in the indoor space (I) flows into the air flow path (P) through the suction ports (39). This air is heated in the indoor heat exchanger (32), and then is divided into the upper flow path (42) and the lower flow path (41). The air in the upper flow path (42) is blown out of the second outlet port (40) toward the ceiling side of the indoor space (I). The air in the lower flow path (41) is blown out of the first outlet port (37) toward the 15 vicinity of the floor of the indoor space (I).

[0084] (7) Measures against Leakage of Air (7-1) Problems regarding Measures against Leakage of Air In the cooling operation described above, the lower flow path (41) is closed by the 20 damper (51) in some cases. In this case, in the cooling operation, the upstream side of the damper (51) in the lower flow path (41) has a high pressure, and the air may leak from the lower flow path (41) to the first space (S1). In particular, the lower flow path (41) is located on the discharge side of the indoor fan (34). In addition, the indoor fan (34) is a centrifugal fan (precisely a turbo fan) having a relatively high fan static pressure. Thus, in the indoor unit (30) 25 of this embodiment, such leakage of air is more likely to occur. 2025201295   24 Feb 2025

[0085] If the cooled air leaks into the first space (S1), the temperature of air in and around the first space (S1) decreases, and condensation water is likely to be generated. Further, the first space (S1) is formed inside the front plate (31a), the first side plate (31c), and the like of the 5 casing (31). Thus, the leakage of air into the first space (S1) may cause generation of condensation water around the outside surface of the casing (31).

[0086] As a measure to reduce the leakage of air from the lower flow path to the first space, a seal member can be provided around the rotary shaft member so as to cover the first hole of the 10 partition from the first space side. However, in this configuration, when the clearance of the first hole is tightly closed, the rotary shaft member and the seal member come into contact with each other. As a result, the seal member is caught in the rotary shaft member, or the torque of the rotary shaft member increases. Thus, the state of the damper (the opening-closing member) cannot be stably switched. 15

[0087] In order to solve this problem, the damper unit (50) of this embodiment has a structure that can reduce the leakage of air from the lower flow path (41) to the first space (S1) as well as reducing the contact between the seal member (95) and the rotary shaft member (80).

[0088] 20          (7-2) Seal Member As illustrated in FIGS. 8 and 9, the damper unit (50) includes the seal member (95). The seal member (95) is provided on the outer peripheral surface of the bearing member (60). The seal member (95) is a flexible and elastic sheet member. The seal member (95) further has heat insulating properties. The seal member (95) is made of a resin material with continuous 25 bubbles such as polyethylene foam. The seal member (95) may be made of a resin material with 2025201295   24 Feb 2025 independent bubbles, or made of a synthetic rubber.

[0089] The seal member (95) includes a first seal portion (95a), a second seal portion (95b), and a cover portion (95c) in sequence from the other end side to the one end side of the first 5 direction.

[0090] The first seal portion (95a) is located inside the first hole (H1). Precisely, the first seal portion (95a) is located inside the tubular portion (45b) of the partition (45). The first seal portion (95a) is compressed in the thickness direction by the tubular portion (45b) and the 10 bearing member (60). The second seal portion (95b) is located inside the second hole (H2) of the heat insulator (46). In other words, the second seal portion (95b) is disposed between the inner peripheral surface forming the second hole (H2) and the outer peripheral surface of the bearing member (60). The first seal portion (95a) and the second seal portion (95b) reduce the leakage of air from the lower flow path (41) to the first space (S1). 15

[0091] The seal member (95) is located on the outer peripheral surface of the bearing member (60). In other words, the bearing member (60) is interposed between the seal member (95) and the rotary shaft member (80). Thus, the seal member (95) and the rotary shaft member (80) are not in contact with each other. As a result, the seal member (95) is less caught in the rotary shaft 20 member (80), and the torque of the rotary shaft member (80) less increases. Thus, the damper (51) can be stably switched between the open state and the closed state.

[0092] The cover portion (95c) covers the outer peripheral surface of an intermediate portion (66) of the bearing member (60). The intermediate portion (66) is a portion of the bearing 25 member (60) that is located outside the motor case (55), the first hole (H1), and the second hole 2025201295   24 Feb 2025 (H2). Precisely, the intermediate portion (66) is located between the motor case (55) and the partition (45) and located outside the motor case (55), the first hole (H1), and the second hole (H2). In this embodiment, the air in the lower flow path (41) might leak to a clearance between the bearing member (60) and the rotary shaft member (80). When the air in the lower flow path 5   (41) flows inside the intermediate portion (66) of the bearing member (60), dew condensation might be generated on the outside surface of the intermediate portion (66). To deal with this problem, the cover portion (95c) covers the outer peripheral surface of the bearing member (60), thereby reducing generation of condensation water on the outside surface of the intermediate portion (66). 10

[0093] (7-3) Bearing Member The bearing member (60) extends in the first direction from the housing chamber (S2) to the first hole (H1). In other words, the bearing member (60) allows the lower flow path (41) and the housing chamber (S2) to substantially communicate with each other. Thus, even if air 15 leaks to the clearance between the bearing member (60) and the rotary shaft member (80), the outflow of the air into the first space (S1) can be reduced. As a result, as described above, the generation of condensation water in the first space (S1) and on the outside surface of the casing (31) can be reduced.

[0094] 20            (7-4) Labyrinth Seal Structure As illustrated in FIG. 9, the flange (90) closes the second opening (62) of the bearing member (60). Thus, thanks to the flange (90), the air having leaked to the clearance between the bearing member (60) and the rotary shaft member (80) flows less into the housing chamber (S2). 2025201295   24 Feb 2025 Further, the damper unit (50) of this embodiment has a labyrinth seal structure (L) for reducing leakage of air from the inside of the bearing member (60) to the housing chamber (S2). The labyrinth seal structure (L) is formed in a portion where the bearing member (60) and the rotary shaft member (80) are close to each other. Specifically, the labyrinth seal structure (L) 5 includes the first annular raised portion (92), the second annular raised portion (93), and the second bearing portion (64), each described above. Further, the labyrinth seal structure includes a case-side annular raised portion (94) in an annular shape. The case-side annular raised portion (94) is located on the outer peripheral side of the second annular raised portion (93). The caseside annular raised portion (94) protrudes from the case side plate (56a) to the one end side of 10 the first direction.

[0096] The surface of the first annular raised portion (92) on the other end side of the first direction and the surface of the second bearing portion (64) on the one end side of the first direction are substantially in contact with each other with a slight clearance therebetween. These 15 surfaces form an annular first thrust seal surface (96). The inner surface of the second annular raised portion (93) in the radial direction and the outer surface of the second bearing portion (64) in the radial direction are in sliding contact with each other as described above. These surfaces form an annular first radial seal surface (97). The surface of the second annular raised portion (93) on the other end side of the first direction and the inner surface of the case side 20 plate (56a) are substantially in contact with each other with a slight clearance therebetween. These surfaces form an annular second thrust seal surface (98). The outer peripheral surface of the second annular raised portion (93) and the inner peripheral surface of the case-side annular raised portion (94) are substantially in contact with each other with a slight clearance therebetween. These surfaces form an annular second radial seal surface (99). 2025201295   24 Feb 2025 As described above, in the labyrinth seal structure (L), at least the first thrust seal surface (96), the first radial seal surface (97), the second thrust seal surface (98), and the second radial seal surface (99) are continuously formed. Accordingly, a seal length at the portion where the bearing member (60) and the rotary shaft member (80) are close to each other can be longer. 5 Further, each seal surface (96, 97, 98, 99) turns its direction to the thrust direction and the radial direction in a stepwise manner. This further reduces the leakage of air from the inside of the bearing member (60) to the housing chamber (S2). In the labyrinth seal structure (L), the number of continuous seal surfaces may be still larger or smaller.

[0098] 10          (7-5) Gear Mechanism As described above, in this embodiment, the gear mechanism (G) that transmits the rotative force of the output shaft (71b) of the motor (71) to the rotary shaft member (80) is provided. Thus, as illustrated in FIG. 6, the axis center (P1) of the output shaft (71b) of the motor (71) and the axis center (P2) of the rotary shaft member (80) can be displaced in the 15 radial direction. Thus, even if air leaks from the inside of the bearing member (60) to the housing chamber (S2), the air can escape from direct contact with the motor (71). As a result, generation of dew condensation around the motor (71) can be reduced.

[0099] As illustrated in FIG. 7, the axis center (P1) of the output shaft (71b) of the motor (71) 20 is located higher than the axis center (P2) of the rotary shaft member (80). Thus, even if condensation water is generated in the housing chamber (S2), this condensation water less appears on the motor (71).

[0100] (8) Advantages of Embodiment 25             (8-1) 2025201295   24 Feb 2025 The damper unit (50) includes the rotary shaft member (80), the tubular bearing member (60), and the seal member (95). The rotary shaft member (80) penetrates the first hole (H1) of the partition (45), couples the drive mechanism (70) with the damper (51), and is rotationally driven by the drive mechanism (70). The bearing member (60) is located in the first 5 hole (H1), and rotatably supports the rotary shaft member (80) therein. The seal member (95) is disposed between the inner peripheral surface forming the first hole (H1) and the outer peripheral surface of the bearing member (60).

[0101] In this configuration, the seal member (95) can reduce the leakage of air from the lower 10 flow path (41) to the first space (S1). The seal member (95) is located on the outer peripheral surface of the bearing member (60), and does not come into contact with the rotary shaft member (80). Thus, the damper (51) can be stably switched between the open state and the closed state.

[0102] 15             (8-2) The damper unit (50) includes the motor case (55) disposed in the first space (S1) and forming the housing chamber (S2) housing the drive mechanism (70). The bearing member (60) extends from the housing chamber (S2) of the motor case (55) to the first hole (H1).

[0103] 20           In this configuration, the air having leaked into the bearing member (60) flows into the housing chamber (S2), and thus the leakage of this air to the first space (S1) can be reduced. As a result, the generation of condensation water in the first space (S1) and on the outside surface of the casing (31) can be reduced, and the reliability of the air conditioner (10) can be improved.

[0104] 25             (8-3) 2025201295   24 Feb 2025 The drive mechanism (70) includes the motor (71) having the output shaft (71b), and the gear mechanism (G) that transmits the rotative force of the output shaft (71b) of the motor (71) to the rotary shaft member (80). This configuration allows the air having leaked from the housing chamber (S2) to come less into direct contact with the motor (71), thus ensuring the 5 reliability of the motor (71).

[0105] In particular, the axis center of the output shaft (71b) of the motor (71) is located higher than the axis center of the rotary shaft member (80), and thus the condensation water generated in the housing chamber (S2) appears less on the motor (71). 10

[0106] (8-4) The flange (90) closes the first opening (61) which is the opening of the bearing member (60) near the drive mechanism (70). This can reduce the leakage of air from the bearing member (60) to the housing chamber (S2). 15

[0107] In particular, the damper unit (50) has the labyrinth seal structure (L) that seals the clearance between the bearing member (60) and the flange (90). Thus, the seal length of the seal surface between the bearing member (60) and the rotary shaft member (80) can be longer, thus further reducing the leakage of air to the housing chamber (S2). 20

[0108] (8-5) The bearing member (60) includes the first bearing portion (63) located near the damper (51) and provided in sliding contact with the rotary shaft member (80), and the second bearing portion (64) located near the drive mechanism (70) and provided in sliding contact with 25 the rotary shaft member (80). In this configuration, both end portions of the rotary shaft member 2025201295   24 Feb 2025 (80) in the axial direction can be supported, and thus tilting and misalignment of the axis center of the rotary shaft member (80) can be reduced.

[0109] The intermediate clearance (65) is formed between the first bearing portion (63) and 5 the second bearing portion (64), and thus the sliding resistance of the rotary shaft member (80) can be reduced. As a result, the load can be reduced on the motor (71), and an operation of opening and closing the damper (51) can be quickly performed.

[0110] (8-6) 10           The partition (45) includes the tubular portion (45b) extending from the partition body (45a) in the axial direction of the rotary shaft member (80) and including the first hole (H1). Thus, the seal length in the axial direction in the first hole (H1) can be longer. As a result, the leakage of air from the lower flow path (41) to the first space (S1) can be further reduced.

[0111] 15             (8-7) The seal member (95) covers the periphery of the intermediate portion (66) of the rotary shaft member (80), where the periphery of the intermediate portion (66) is located outside the first hole (H1) and the motor case (55). In other words, the seal member (95) substantially covers the periphery of the intermediate portion (66) that faces the first space (S1). This 20 configuration can reduce generation of condensation water on the outside surface of the intermediate portion (66) when cold air flows through the intermediate portion (66). The seal member (95) serves as both a member for sealing the first hole (H1) and a heat insulator for the intermediate portion (66), and thus the number of components can be reduced.

[0112] 25            The seal member (95) is a flexible sheet member. Thus, while being deformed, the seal 2025201295   24 Feb 2025 member (95) can be easily attached to the outer peripheral surface of the bearing member (60).

[0113] (9) Other Embodiments The above embodiment may be modified as follows. 5

[0114] The indoor unit (30) of the air conditioner (10) may be a wall-mounted-type air conditioner or a ceiling-mounted-type air conditioner. The air conditioner (10) may be a humidity control apparatus for controlling the humidity of the target space (I); an air purifier for purifying air in the target space (I); or a ventilation apparatus for ventilating the target space 10    (I).

[0115] The opening-closing member (51) may open and close an outlet port such as the first outlet port (37) and the second outlet port (40). In this case, the outlet port forms the first flow path. The opening-closing member may be, for example, a flap that opens and closes an outlet 15 port of a wall-mounted-type indoor unit. The opening-closing member (51) may open and close an air flow path of the outdoor unit. The opening-closing member (51) may be a shutter or a ball valve driven by the drive mechanism (70).

[0116] The damper unit (50) may be configured without the heat insulator (46) and the gear 20 mechanism (G).

[0117] While the embodiments and variations thereof have been described above, it will be understood that various changes in form and details may be made without departing from the spirit and scope of the claims. The embodiment, the variation thereof, and the other 25 embodiments may be combined and replaced with each other without deteriorating intended 2025201295   24 Feb 2025 functions of the present disclosure.

[0118] The expressions of “first”, “second”, and “third” described above are used to distinguish the terms to which these expressions are given, and do not limit the number and 5 order of the terms. [0118a] The term "comprise" and variants of that term such as "comprises" or "comprising" are used herein to denote the inclusion of a stated integer or integers but not to exclude any other integer or any other integers, unless in the context or usage an exclusive interpretation of the 10 term is required. INDUSTRIAL APPLICABILITY

[0119] As described above, the present disclosure is useful for an air conditioner. 15 DESCRIPTION OF REFERENCE CHARACTERS

[0120] 10     Air Conditioner 31     Casing 32     Indoor Heat Exchanger (Heat Exchanger) 20   37      First Outlet Port 40     Second Outlet Port 41     Lower Flow Path (First Flow Path) 45      Partition 45a    Partition Body 25   45b    Tubular Portion 2025201295   24 Feb 2025 51     Damper (Opening-Closing Member) 55     Motor Case (Housing Member) 60     Bearing Member 61     First Opening (Opening) 5   63      First Bearing Portion 64     Second Bearing Portion 66      Intermediate Portion 70     Drive Mechanism 71     Motor 10   71b    Output Shaft 80     Rotary Shaft Member 81     Rotary Shaft Body 83     Driven Gear 90     Flange 15   95     Seal Member G     Gear Mechanism H1     First Hole (Hole) I       Indoor Space (Target Space) L      Labyrinth Seal Structure 20   P      Air Flow Path S1      First Space S2    Housing Chamber

Claims

1. An air conditioner including:a casing including an air flow path;5            a partition separating a first flow path in the air flow path and a first space and includinga hole;a drive mechanism disposed in the first space;an opening-closing member configured to open and close the first flow path;a rotary shaft member penetrating the hole of the partition, coupling the drive10 mechanism with the opening-closing member, and configured to be rotationally driven by the drive mechanism;a tubular bearing member located in the hole and configured to rotatably support the rotary shaft member therein; anda seal member disposed between an inner peripheral surface forming the hole and an15 outer peripheral surface of the bearing member.

2. The air conditioner of claim 1, further including:a housing member disposed in the first space and forming a housing chamber that houses the drive mechanism,20          whereinthe bearing member extends from the housing chamber to the hole.

3. The air conditioner of claim 2, whereinthe drive mechanism includes25                    a motor including an output shaft, and2025201295   24 Feb 2025a gear mechanism configured to transmit rotative force of the output shaft of the motor to the rotary shaft member.

4. The air conditioner of claim 3, wherein5            an axis center of the output shaft of the motor is located higher than an axis center ofthe rotary shaft member.

5. The air conditioner of claim 3 or 4, whereinthe gear mechanism includes a driven gear provided on the rotary shaft member.10

6. The air conditioner of any one of claims 2 to 5, whereinthe rotary shaft member includesa rotary shaft body, anda flange extending outward in a radial direction from the rotary shaft body so15 as to close an opening which is an opening of the bearing member near the drive mechanism.

7. The air conditioner of claim 6, further including:a labyrinth seal structure configured to seal a clearance between the bearing member and the flange.20

8. The air conditioner of any one of claims 1 to 7, whereinthe bearing member includesa first bearing portion located near an opening-closing member and provided in sliding contact with the rotary shaft member, and25                   a second bearing portion located near the drive mechanism and provided in2025201295   24 Feb 2025sliding contact with the rotary shaft member.

9. The air conditioner of any one of claims 2 to 8, whereinthe bearing member includes an intermediate portion located outside the hole of the5 partition and outside the housing member, andthe seal member covers a periphery of the intermediate portion.

10. The air conditioner of any one of claims 1 to 9, whereinthe partition includes10                    a partition body, anda tubular portion extending from the partition body in an axial direction of therotary shaft member and including the first hole, andthe seal member is disposed between an inner peripheral surface of the tubular portion and the outer peripheral surface of the bearing member.15

11. The air conditioner of any one of claims 1 to 10, whereinthe seal member is a flexible sheet member.

12. The air conditioner of any one of claims 1 to 11, further including:20           a heat exchanger disposed in the air flow path and functioning as a radiator and anevaporator,whereinthe casing includesa first outlet port through which air in the air flow path is blown into a target25 space, and2025201295   24 Feb 2025a second outlet port which is located above the first outlet port and throughwhich the air in the air flow path is blown into the target space, andthe first flow path is the first outlet port or a flow path continuous with the first outletport.Daikin Industries, Ltd.Patent Attorneys for the ApplicantSPRUSON & FERGUSON

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