Air conditioner

Abstract

An air examination device includes: a casing (40) having an air flow path (P); a first flow path (P1) included in the air flow path (P); an opening / closing member (90) that opens and closes the first flow path (P1); a drive mechanism (100) that drives the opening / closing member (90); a refrigerant sensor (140) that detects a refrigerant leaking into the casing (40); a first attachment portion (211) to which the drive mechanism (100) is attached; a second attachment portion (300b) to which the refrigerant sensor (140) is attached; and a housing portion (200) including the first attachment portion (211) and the second attachment portion (300b) therein such that the first attachment portion (211) and the second attachment portion (300b) are disposed facing a front panel portion (41) constituting the casing (40). 20 25 20 22 15 27 M ar 2 02 5 M a r 2 0 2 5 A I R C O N D I T I O N E R A B S T R A C T A n a i r e x a m i n a t i o n d e v i c e i n c l u d e s : a c a s i n g ( 4 0 ) h a v i n g a n a i r f l o w p a t h ( P ) ; a f i r s t 2 0 2 5 2 0 2 2 1 5 2 7 f l o w p a t h ( P 1 ) i n c l u d e d i n t h e a i r f l o w p a t h ( P ) ; a n o p e n i n g / c l o s i n g m e m b e r ( 9 0 ) t h a t o p e n s a n d c l o s e s t h e f i r s t f l o w p a t h ( P 1 ) ; a d r i v e m e c h a n i s m ( 1 0 0 ) t h a t d r i v e s t h e o p e n i n g / c l o s i n g m e m b e r ( 9 0 ) ; a r e f r i g e r a n t s e n s o r ( 1 4 0 ) t h a t d e t e c t s a r e f r i g e r a n t l e a k i n g i n t o t h e c a s i n g ( 4 0 ) ; a f i r s t a t t a c h m e n t p o r t i o n ( 2 1 1 ) t o w h i c h t h e d r i v e m e c h a n i s m ( 1 0 0 ) i s a t t a c h e d ; a s e c o n d a t t a c h m e n t p o r t i o n ( 3 0 0 b ) t o w h i c h t h e r e f r i g e r a n t s e n s o r ( 1 4 0 ) i s a t t a c h e d ; a n d a h o u s i n g p o r t i o n ( 2 0 0 ) i n c l u d i n g t h e f i r s t a t t a c h m e n t p o r t i o n ( 2 1 1 ) a n d t h e s e c o n d a t t a c h m e n t p o r t i o n ( 3 0 0 b ) t h e r e i n s u c h t h a t t h e f i r s t a t t a c h m e n t p o r t i o n ( 2 1 1 ) a n d t h e s e c o n d a t t a c h m e n t p o r t i o n ( 3 0 0 b ) a r e d i s p o s e d f a c i n g a f r o n t p a n e l p o r t i o n ( 4 1 ) c o n s t i t u t i n g t h e c a s i n g ( 4 0 ) . M a r 2 0 2 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 2 2 1 5 2 7 3 / 12 FIG.3 30 55 54 45 40 P2 41a 58a 53 32c S P 32 32a 32b 41 P1 51 52 UP 44 90 90 FRONT REAR 80 DOWN 20 25 20 22 15 27 M ar 2 02 5 3 / 1 2 M a r 2 0 2 5 F I G . 3 3 0 5 5 5 4 4 5 4 0 2 0 2 5 2 0 2 2 1 5 2 7 P 2 4 1 a 5 8 a 5 3 3 2 c S P 3 2 3 2 a 3 2 b 4 1 P 1 5 1 5 2 O U P 4 4 9 0 9 0 F R O N T R E A R 8 0 D O W N M a r 2 0 2 5 F I G . 3 3 0 5 5 5 4 4 5 4 0 2 0 2 5 2 0 2 2 1 5 2 7 P 3 2 3 2 a 3 2 b 4 1 P 1 5 1 5 2 O U P 4 4 9 0 9 0 F R O N T R E A R 8 0 D O W N

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims priority from Japanese Patent Application Nos. 2024055503 filed on March 29, 2024, and 2025-030081 filed on February 27, 2025, with the Japan Patent Office, and the entire disclosures of these applications are incorporated herein by reference. BACKGROUND OF THE INVENTION 1. TECHNICAL FIELD

[0002] The present disclosure relates to an air conditioner. 2. DESCRIPTION OF THE RELATED ART

[0003] An air conditioner described in JP 2016-90107 A includes an indoor unit provided with a refrigerant gas sensor. The refrigerant gas sensor detects a refrigerant leaking into the indoor unit. SUMMARY OF THE INVENTION

[0004] In the indoor unit described in JP 2016-90107 A, the refrigerant gas sensor is disposed behind a connection pipe. In such a case, the refrigerant gas sensor cannot be easily removed or attached from the front of the indoor unit.

[0005] An object of the present disclosure is to provide an air conditioner capable of easily attaching and removing a refrigerant gas sensor.

[0006] A first aspect is an air conditioner including: a casing (40) having an air flow path (P); a first flow path (P1) included in the air flow path (P); an opening / closing member (90) that opens and closes the first flow path (P1); a drive mechanism (100) that drives the opening / closing member (90); 2025202215   27 Mar 2025 a refrigerant sensor (140) that detects a refrigerant leaking into the casing (40); a first attachment portion (211) to which the drive mechanism (100) is attached; a second attachment portion (300b) to which the refrigerant sensor (140) is attached, and a housing portion (200) having the first attachment portion (211) and the second attachment portion (300b) therein such that the first attachment portion (211) and the second attachment portion (300b) are disposed facing a front panel portion (41) constituting the casing (40).

[0007] In the first aspect, since the housing portion (200) faces the front panel portion (41), the refrigerant sensor (140) in the housing portion (200) can be easily removed and attached from the front side only by removing the front panel. As described above, maintainability of an air examination device is improved. In addition, since the drive mechanism (100) and the refrigerant sensor (140) can be housed in one housing portion (200), downsizing can be realized, and the number of parts can be reduced as compared with a case where the drive mechanism (100) and the refrigerant sensor (140) are housed in separate housing cases.

[0008] A second aspect according to the first aspect, in which the second attachment portion (300b) is disposed closer to the front panel portion (41) than the first attachment portion (211).

[0009] In the second aspect, with such an arrangement, the length in the width direction (leftright direction) of the casing (40) can be shortened as compared with a case where the first attachment portion (211) and the second attachment portion (300b) are arranged side by side in the width direction of the casing (40). Accordingly, a product of the air conditioner can be downsized.

[0010] A third aspect according to the first or the second aspect, in which the second attachment portion (300b) is provided such that at least a part of the first attachment portion (211) is located above the second attachment portion (300b) when viewed from the front of the housing portion (200).

[0011] In the third aspect, since the refrigerant sensor (140) can be disposed below the first attachment portion (211), a space below the first attachment portion (211) can be effectively used. Accordingly, downsizing of a product can be achieved. 2025202215   27 Mar 2025

[0012] A fourth aspect according to any one of the first to third aspects, further includes a rotary shaft member (120) that connects the opening / closing member (90) and the drive mechanism (100), in which the drive mechanism (100) includes: a motor (101) having an output shaft (102); and a gear (110) that transmits a rotational force of the motor (101) to the rotary shaft member (120), and the second attachment portion (300b) is disposed closer to the front panel portion (41) than the rotary shaft member (120).

[0013] In the fourth aspect, the second attachment portion (300b) is disposed closer to the front panel portion (41), so that operations of removing and attaching the refrigerant sensor (140) from the front can be easily performed.

[0014] A fifth aspect according to the fourth aspect, in which a shaft center of the output shaft (102) is disposed above a shaft center of the gear (110), and the refrigerant sensor (140) attached to at least a part of the second attachment portion (300b) or the second attachment portion (300b) is disposed below the output shaft (102).

[0015] In the fifth aspect, by disposing the second attachment portion (300b) in a space below the output shaft (102) of the motor (101), the space below the motor (101) can be effectively used.

[0016] A sixth aspect according to the fourth or fifth aspect, in which the second attachment portion (300b) is disposed such that at least a part of the second attachment portion (300b) overlaps with the motor (101) when viewed from above.

[0017] In the sixth aspect, by disposing the second attachment portion (300b) in the space immediately below the output shaft (102) of the motor (101), the space immediately below the motor (101) can be effectively used.

[0018] A seventh aspect according to any one of the fourth to sixth aspects, further includes an electric component box (65) that is disposed above the housing portion (200) and houses a predetermined electric component, 2025202215   27 Mar 2025 in which a first wiring (H1) of the refrigerant sensor (140) extends from the housing portion (200) to the electric component box (65) together with a second wiring (H2) of the motor (101).

[0019] In the seventh aspect, the wiring of the refrigerant sensor (140) and the wiring of the motor (101) can be integrated. As a result, it is possible to prevent the wiring from interfering with the work at the time of removing other components.

[0020] An eighth aspect according to the seventh aspect, in which the housing portion (200) is formed at a height position above the second attachment portion (300b) and has an insertion hole (215) through which the first wiring (H1) and the second wiring (H2) are inserted so as to extend to the outside of the housing portion (200), and further includes a restricting member (220) that restricts arrangement of the first wiring (H1) and the second wiring (H2) so that the first wiring (H1) and the second wiring (H2) extend downward from the insertion hole (215) and then extend upward toward the electric component box (65).

[0021] In the eighth aspect, water droplets adhered to the first wiring (H1) or the second wiring (H2) flow toward the restricting member (220) along the first wiring (H1) or the second wiring (H2), and thus can be prevented from entering the first attachment portion (211). As a result, it is possible to suppress failure of the motor (101) and the refrigerant sensor (140).

[0022] A ninth aspect according to any one of the first to eighth aspects, in which the housing portion (200) is disposed on a side of the opening / closing member (90).

[0023] In the ninth aspect, the housing portion (200) can be disposed by effectively using the space on a side of the opening / closing member (90).

[0024] A tenth aspect according to any one of the first to ninth aspects, includes: a heat exchanger (31) disposed in the air flow path (P); and a drain pan (50) disposed below the heat exchanger (31), in which the housing portion (200) is disposed below the drain pan (50). 2025202215   27 Mar 2025

[0025] In the tenth aspect, the housing portion (200) can be disposed by effectively using a space below the drain pan (50).

[0026] An eleventh aspect according to any one of the first to tenth aspects, in which the casing (40) includes a bottom plate (44) constituting a bottom surface of the casing (40), and the housing portion (200) is disposed above the bottom plate (44).

[0027] In the eleventh aspect, when water leakage occurs, there is a possibility that water accumulates in the floor board. However, by disposing the second attachment portion (300b) above the bottom plate (44), it is possible to suppress a failure of the refrigerant sensor (140) due to water immersion.

[0028] A twelfth aspect according to any one of the first to tenth aspects, in which the first attachment portion (211) constitutes the housing portion (200) that houses the drive mechanism (100), the second attachment portion (300b) constitutes a housing case (300) that houses the refrigerant sensor (140), the housing portion (200) includes: a housing space (231) formed in a lower part of the housing portion (200); and an opening (232) communicating with the housing space (231) and opened toward the front panel portion (41), and the housing case (300) is housed in the housing space (231) through the opening (232).

[0029] In the twelfth aspect, the housing case (300) housing the refrigerant sensor (140) can be taken out from the housing portion (200) through the opening (232). As described above, since only the refrigerant sensor (140) can be taken out from the housing portion (200), maintainability such as replacement of the refrigerant sensor (140) can be improved.

[0030] A thirteenth aspect according to any one of the first to twelfth aspects, further includes a heat exchanger (31) disposed in the air flow path (P) and functioning as a radiator and an evaporator, in which the casing (40) includes: a first blow-out port (51) that blows out air in the air flow path (P) into a target 2025202215   27 Mar 2025 space; and a second blow-out port (54) that is located above the first blow-out port (51) and blows out the air in the air flow path (P) into the target space, and the first flow path (P1) is the first blow-out port (51) or a flow path continuous with the first blow-out port (51). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG. 1 is a piping system diagram of a refrigerant circuit of an air conditioner of the present embodiment; FIG. 2 is a three-dimensional perspective view illustrating an external appearance of an indoor unit of the present embodiment; FIG. 3 is a III-III arrow cross-sectional view of the indoor unit of FIG. 2; FIG. 4 is a front view of the indoor unit with a front panel portion removed; FIG. 5 is a view of a drain pan and a gear box of the indoor unit as viewed from the side; FIG. 6 is a perspective view of a damper unit from the rear; FIG. 7 is a view of a drive mechanism and a refrigerant sensor as viewed from the above; FIG. 8 is an exploded perspective view of a sensor box; FIG. 9 is an exploded perspective view of the gear box; FIG. 10 is a view 10 illustrating attachment of the sensor box to the gear box; FIG. 11 is a three-dimensional perspective view of the gear box; and FIG. 12 is a view of the gearbox as viewed from the right side in a state where the 2025202215   27 Mar 2025 right-side housing is removed. DETAILED DESCRIPTION

[0032] <Embodiment> Embodiments of the present disclosure will be described hereinafter with reference to the drawings. Note that the following embodiments are essentially preferred examples, and are not intended to limit the scope of the present disclosure, matters to which the present disclosure is applicable, or the usage of the present disclosure. In addition, configurations of the respective embodiments, modifications, other examples, and the like described below can be combined or partially replaced within the scope in which the present disclosure can be implemented. In the following description, “upper”, “lower”, “front”, “rear”, “right”, and “left” indicate directions illustrated in FIGS. 2 to 12. A thick arrow in FIG. 3 indicates a direction in which air flows in an air flow path (P).

[0033] (1) 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 of a separate type in which the outdoor unit (20) and the indoor unit (30) are connected via two connection pipes (12,13). This connection constitutes a refrigerant circuit (11). A refrigerant is sealed in the refrigerant circuit (11). The refrigerant is, for example, R32 which is a hydrofluorocarbon (HFC). The refrigerant circuit (11) executes a refrigeration cycle operation. The air conditioner (10) performs airconditioning in a target space.

[0034] (2) Outdoor Unit The outdoor unit (20) is disposed outdoors. The outdoor unit (20) includes a compressor (21), an outdoor heat exchanger (22), a four-way switching valve (24), and an expansion valve (23) that are connected to the refrigerant circuit (11). The outdoor unit (20) includes an outdoor fan (25).

[0035] The compressor (21) compresses a sucked refrigerant. The compressor (21) discharges a compressed refrigerant. The compressor (21) is a rotary compressor such as a 2025202215   27 Mar 2025 scroll type, a swing piston type, a rolling piston type, or a screw type.

[0036] The outdoor heat exchanger (22) exchanges heat between a refrigerant flowing inside the outdoor heat exchanger and outdoor air by the outdoor fan (25). The outdoor fan (25) conveys outside air (outdoor air) to the outdoor heat exchanger (22).

[0037] The four-way switching valve (24) switches a flow path of the refrigerant circuit (11). The four-way switching valve (24) is switched between a first state indicated by a solid line in FIG. 1 and a second state indicated by a broken line in FIG. 1. In the first state, a first refrigeration cycle operation is executed. In the second state, s second refrigeration cycle operation is executed.

[0038] The expansion valve (23) decompresses the refrigerant. The expansion valve (23) is an electronic expansion valve whose opening degree is adjustable.

[0039] (3) Indoor Unit As illustrated in FIGS. 2 to 4, the indoor unit (30) includes a casing (40), an indoor heat exchanger (31), an indoor fan (32), a drain pan (50), a damper unit (80), and an electric component box (65). The indoor unit (30) is installed in an indoor space that is a target space. The indoor unit (30) is a floor-mounted type. Each component of the indoor unit (30) will be described below.

[0040] (3-1) Casing As shown in FIGS. 2 and 3, the casing (40) is formed in a substantially rectangular parallelepiped box shape. The casing (40) includes a front panel portion (41), a pair of side panel portions (42), a back panel (43), a bottom panel (44), and a top plate portion (45).

[0041] Specifically, the casing (40) of the present embodiment includes a first body frame (47), a second body frame (48), the top plate portion (45), a suction grill (41a), and the back panel (43).

[0042] The first body frame (47) constitutes the front panel portion (41) and a pair of front side surface panels (42a) of the casing (40). The front side surface panel (42a) constitutes a front 2025202215   27 Mar 2025 portion of the side panel portion (42). The front panel portion (41) and the pair of front side surface panels (42a) are integrally formed.

[0043] The casing (40) has a first blow-out port (51). The first blow-out port (51) blows out air in the air flow path (P) described later into the target space. The first blow-out port (51) is formed in a lower part of the front panel portion (41). In other words, the first blow-out port (51) is located in a lower part of the casing (40). The first blow-out port (51) is a long hole extending in the left-right direction. A first airflow direction adjusting unit (52) is disposed at the first blow-out port (51).

[0044] The first airflow direction adjusting unit (52) includes a plurality of blades arranged in the first blow-out port (51) in the left-right direction. The plurality of blades of the first airflow direction adjusting unit (52) rotates in the same direction. As a result, the direction of the air blown out in the left-right direction from the first blow-out port (51) is adjusted.

[0045] A suction port (53) is formed in an upper part of the front panel portion (41). Specifically, the suction port (53) is formed above the first blow-out port (51). The suction port (53) is formed substantially from one end to the other end of the front panel portion (41) in the left-right direction. The first body frame (47) is detachable from the second body frame (48).

[0046] The suction grill (41a) is provided so as to cover the suction port (53). The suction grill (41a) is detachable from the first body frame (47). The suction grill (41a) has a plurality of slits (S) extending in the left-right direction and aligned in the up-down direction. Indoor air is sucked into the suction port (53) through the slits (S).

[0047] The second body frame (48) constitutes a pair of rear side surface panels (42b) and the bottom panel (44) of the casing (40). The pair of rear side surface panels (42b) and the bottom panel (44) are integrally formed. The rear side surface panel (42b) constitutes a rear side portion of the side panel portion (42). A lower surface of the bottom panel (44) is in contact with a floor surface.

[0048] The back panel (43) is attached from behind so as to close inside the frame of the second body frame (48). 2025202215   27 Mar 2025

[0049] The casing (40) has a second blow-out port (54). The second blow-out port (54) blows out the air in the air flow path (P) into the target space. The second blow-out port (54) is located above the first blow-out port (51). Specifically, the second blow-out port (54) is provided on the top plate portion (45). In other words, the second blow-out port (54) is located in an upper part of the casing (40). The second blow-out port (54) is formed so as to extend in the left-right direction of the top plate portion (45). The second blow-out port (54) is provided with a second airflow direction adjusting unit (55).

[0050] The second airflow direction adjusting unit (55) is formed in a plate shape extending in the left-right direction. The second airflow direction adjusting unit (55) switches the second blow-out port (54) between an open state and a closed state. In addition, the second airflow direction adjusting unit (55) adjusts a direction in which air is blown out from the second blowout port (54). The second airflow direction adjusting unit (55) is rotatably and pivotally supported by the top plate portion (45). As a result, the posture of the second airflow direction adjusting unit (55) is controlled.

[0051] An operation unit (56) and a notification unit (57) are disposed on the top plate portion (45). The operation unit (56) inputs, to the air conditioner, an instruction such as turning on and off of a power supply and switching of an operation by a user's operation. The notification unit (57) notifies a user of an operation state of the air conditioner and a thermal environment (room temperature, room humidity, and the like) in the room.

[0052] (3-2) Air Flow Path The casing (40) has an air flow path (P). The air flow path (P) includes a lower flow path (P1) and an upper flow path (P2). The lower flow path (P1) is a flow path communicating the suction port (53) and the first blow-out port (51). The lower flow path (P1) is a flow path continuous with the first blow-out port (51). The upper flow path (P2) is a flow path communicating the suction port (53) and the second blow-out port (54). The lower flow path (P1) is a first flow path (P1).

[0053] (3-3) Indoor Heat Exchanger The indoor heat exchanger (31) is disposed in the air flow path (P). The indoor heat exchanger (31) functions as a radiator and an evaporator. 2025202215   27 Mar 2025

[0054] The indoor heat exchanger (31) exchanges heat between a refrigerant and indoor air conveyed by the indoor fan (32). The indoor heat exchanger (31) is of a fin and tube type. The indoor heat exchanger (31) is disposed closer to the front in the casing (40). Specifically, the indoor heat exchanger (31) is disposed behind the suction port (53). The indoor heat exchanger (31) is disposed over substantially the entire area of the suction port (53).

[0055] (3-4) Bell Mouth A bell mouth (58) is provided in the casing (40). The bell mouth (58) is disposed between the indoor heat exchanger (31) and the indoor fan (32). The bell mouth (58) guides the air having passed through the indoor heat exchanger (31) to the indoor fan (32). Specifically, the bell mouth (58) includes a guide portion (58a). The guide portion (58a) is provided to extend from an opening edge of the bell mouth (58) toward the first blow-out port (51) and the second blow-out port (54). The guide portion (58a) guides the air having passed through the indoor fan (32) toward the first blow-out port (51) or the second blow-out port (54).

[0056] (3-5) Indoor Fan The indoor fan (32) is disposed behind the bell mouth (58). The indoor fan (32) is a centrifugal fan, specifically, a turbo fan. The indoor fan (32) includes a fan motor (32a), a fan drive shaft (32b) rotatably driven by the fan motor (32a), and an impeller (32c) connected to the fan drive shaft (32b). The fan drive shaft (32b) extends in the front-rear direction. When the indoor fan (32) is brought into an operating state, the air having passed through the bell mouth (58) changes its direction radially outward of the impeller (32c). The air directed downward from the indoor fan (32) passes through the lower flow path (P1) and is blown out into the indoor space from the first blow-out port (51). The air directed upward from the indoor fan (32) passes through the upper flow path (P2) and is blown out into the indoor space from the second blow-out port (54).

[0057] (3-6) Drain Pan As illustrated in FIG. 5, the drain pan (50) is disposed below the indoor heat exchanger (31). The drain pan (50) receives water adhering to the indoor heat exchanger (31). The drain pan (50) is disposed from a right end to a left end of the indoor heat exchanger (31). The drain pan (50) is formed in a tray shape. 2025202215   27 Mar 2025

[0058] A bottom portion (59) of the drain pan (50) includes a flat portion (59a), a front inclined portion (59b), and a rear inclined portion (59c). The flat portion (59a) is disposed substantially at the center of the bottom portion (59) in the front-rear direction. The upper surface of the flat portion (59a) is generally a horizontal surface. The front inclined portion (59b) extends so as to be inclined upward from the flat portion (59a) toward a front wall of the drain pan (50). The rear inclined portion (59c) extends so as to be inclined upward from the flat portion (59a) toward a rear wall of the drain pan (50).

[0059] An opening (not illustrated) for discharging drain water accumulated in the drain pan (50) to the outside is formed in the drain pan (50). A cylindrical drain port (60) is provided in the opening. A drain hose (not illustrated) for conveying the drain water to the outside is connected to the drain port (60).

[0060] The drain port (60) is provided at one end of the drain pan (50) in the left-right direction. The drain port (60) is provided in a lower part of the drain pan (50). The drain port (60) extends rearward from the bottom portion (59) of the drain pan (50), and is inclined such that an opening end of the drain port (60) faces obliquely downward. Specifically, the drain port (60) extends obliquely downward from the rear inclined portion (59c) of the bottom portion (59).

[0061] (3-7) Electric Component Box As illustrated in FIG. 4, the electric component box (65) is disposed at an upper part and a right end in the casing (40). The electric component box (65) houses a predetermined electric component. The electric component is, for example, an indoor control unit (C2) that controls various devices of the indoor unit (30).

[0062] (3-8) Damper Unit As illustrated in FIGS. 6 and 7, the casing (40) is provided with the damper unit (80). The damper unit (80) constitutes the lower flow path (P1). Specifically, the damper unit (80) includes a flow path inner wall portion (81), a damper (90), a drive mechanism (100), and a rotary shaft member (120).

[0063] The flow path inner wall portion (81) constitutes an inner wall of the lower flow path 2025202215   27 Mar 2025 (P1). The flow path inner wall portion (81) has an upper surface portion (81a), a left side surface portion (81b), and a right side surface portion (81c). The flow path inner wall portion (81) is formed integrally with the drain pan (50).

[0064] Specifically, the upper surface portion (81a) is formed of the bottom portion (59) of the drain pan (50). The left side surface portion (81b) is formed by a left side wall of the drain pan (50) extending downward. The right side surface portion (81c) is formed by a right side wall of the drain pan (50) extending downward. The lower surface of the flow path inner wall portion (81) is formed of a part of the bottom panel (44). In this manner, the flow path inner wall portion (81) is formed below the drain pan (50). In other words, the lower flow path (P1) is formed below the drain pan (50).

[0065] The damper (90) is an opening / closing member (90) that opens and closes the lower flow path (P1). The damper (90) is disposed inside the flow path inner wall portion (81). The damper (90) is a horizontally long plate member. The damper (90) is rotatably supported by the flow path inner wall portion (81) by a plurality of support members (84,85,86). Specifically, three support members (84,85,86) are provided at the lower end of the damper (90). The support members (84,85,86) are a first support member (84), a second support member (85), and a third support member (86).

[0066] The first support member (84) is provided at the right end of the damper (90). The first support member (84) is rotatably and pivotally supported by the right side surface portion (81c) of the flow path inner wall portion (81). The rotational force of the drive mechanism (100) disposed on the right side of the right side surface portion (81c) is directly transmitted to the first support member (84).

[0067] Specifically, the first support member (84) penetrates the right side surface portion (81c), and is connected to the rotary shaft member (120) extending from the drive mechanism (100). The rotary shaft member (120) transmits a rotational force of the drive mechanism (100) to the first support member (84). In this manner, the rotary shaft member (120) connects the damper (90) and the drive mechanism (100).

[0068] The second support member (85) is provided substantially at the center of the damper (90). The second support member (85) is pivotally supported by a lower surface portion (81d). 2025202215   27 Mar 2025

[0069] The third support member (86) is provided at the left end of the damper (90). The third support member (86) is rotatably and pivotally supported by the left side surface portion (81b).

[0070] As described above, the damper (90) is supported by the flow path inner wall portion (81) at three points, so that the opening and closing operation of the lower flow path (P1) can be stably performed. The number of the support members (84,85,86) may be 2 or 4 or more.

[0071] (3-9) Drive Mechanism The drive mechanism (100) includes a motor (101) and a gear (110). The motor (101) is, for example, a stepping motor. An electric wiring (H2) is connected to the motor (101) (see FIG. 12). The electric wiring (H2) is connected to an electric component housed in the electric component box (65). The motor (101) is controlled by a predetermined signal output from the electric component via the electric wiring (H2). The electric wiring (H2) is an example of a second wiring (H2).

[0072] The motor (101) has an output shaft (102). The output shaft (102) extends in the leftright direction. The output shaft (102) extends in the same direction as the axial direction of the rotary shaft member (120). The output shaft (102) is provided with a first pinion (103).

[0073] The gear (110) transmits a rotational force of the motor (101) to the rotary shaft member (120). Specifically, the gear (110) is provided with a second pinion (112) and a third pinion (113). The second pinion (112) and the third pinion (113) are disposed side by side in the left-right direction. In other words, the second pinion (112) and the third pinion (113) are disposed adjacent to each other in the extending direction of the output shaft (102). The second pinion (112) is disposed so as to mesh with the first pinion (103). The third pinion (113) is disposed so as to mesh with a fourth pinion (121) of the rotary shaft member (120). As described above, the rotational force of the motor (101) is transmitted to the rotary shaft member (120) via the gear (110).

[0074] (3-10) Refrigerant Sensor A refrigerant sensor (140) detects a refrigerant leaking into the casing (40). The refrigerant sensor (140) may be a sensor that detects a refrigerant concentration in the air. 2025202215   27 Mar 2025

[0075] As illustrated in FIG. 8, the refrigerant sensor (140) includes a detection element (141) and a substrate (142). The detection element (141) may be an element having a metal oxide semiconductor. The substrate (142) converts a reaction of the detection element (141) when coming into contact with refrigerant gas into a predetermined signal.

[0076] A sensor wiring (H1) is connected to the refrigerant sensor (140) (see FIG. 12). The sensor wiring (H1) is connected to an electric component housed in the electric component box (65). The refrigerant concentration detected by the refrigerant sensor (140) is transmitted to the electric component in the electric component box (65) via the sensor wiring (H1).

[0077] (4) Control Unit As illustrated in FIG. 1, the air conditioner (10) includes an outdoor control unit (C1) and the indoor control unit (C2). The outdoor control unit (C1) and the indoor control unit (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 to be executed by the CPU.

[0078] The outdoor control unit (C1) is provided in the outdoor unit (20). The outdoor control unit (C1) controls the operation of the compressor (21), the rotation speed of the outdoor fan (25), the opening degree of the expansion valve (23), and the like in the outdoor unit (20).

[0079] The indoor control unit (C2) is provided in the indoor unit (30). The indoor control unit (C2) is included in the above-described electric component housed in the electric component box (65). The indoor control unit (C2) controls operations of the motor (101) and the indoor fan (32). The indoor control unit (C2) receives a signal output from the refrigerant sensor (140).

[0080] (5) Cooling Operation and Heating Operation (5-1) Cooling Operation During the cooling operation, the outdoor control unit (C1) brings the four-way switching valve (24) into the first state. During the cooling operation, the outdoor control unit (C1) and the indoor control unit (C2) operate the compressor (21), the outdoor fan (25), and the 2025202215   27 Mar 2025 indoor fan (32) to adjust the opening degree of the expansion valve (23).

[0081] The indoor control unit (C2) closes the damper (90) (state indicated by the broken line in FIG. 3), and the indoor control unit (C2) opens the second blow-out port (54). As a result, the lower flow path (P1) is closed. The air sucked through the suction port (53) passes through the upper flow path (P2) and is blown out into the indoor space through the second blow-out port (54). The indoor control unit (C2) may adjust the second airflow direction adjusting unit (55) to a predetermined posture on the basis of a command input by the user. In addition, during the cooling operation, the damper (90) does not need to be in the closed state at all time. During the cooling operation, a control unit (C) may switch the damper (90) between the open state and the closed state in response to the operation of the user.

[0082] The refrigerant circuit (11) during the cooling operation performs a refrigeration cycle (cooling cycle) in which the outdoor heat exchanger (22) functions as a radiator and the indoor heat exchanger (31) functions as an evaporator.

[0083] (5-2) Heating Operation During the heating operation, the outdoor control unit (C1) brings the four-way switching valve (24) into the second state. During the heating operation, the outdoor control unit (C1) and the indoor control unit (C2) operate the compressor (21), the outdoor fan (25), and the indoor fan (32) to adjust the opening degree of the expansion valve (23).

[0084] The indoor control unit (C2) opens the damper (90) (state indicated by the solid line in FIG. 3) and opens the second blow-out port (54). As a result, the air sucked through the suction port (53) flows into the lower flow path (P1) and the upper flow path (P2). The air heated by the indoor heat exchanger (31) is blown out into the indoor space through the first blow-out port (51) and the second blow-out port (54).

[0085] The refrigerant circuit (11) during the heating operation performs a refrigeration cycle (heating cycle) in which the indoor heat exchanger (31) functions as a radiator and the outdoor heat exchanger (22) functions as an evaporator.

[0086] (6) Gear Box 2025202215   27 Mar 2025 As illustrated in FIGS. 4 and 9 to 12, the indoor unit (30) of the air conditioner (10) includes a gear box (200). The gear box (200) is a member that houses the drive mechanism (100) and the refrigerant sensor (140), and includes a first attachment portion (211) and a second attachment portion (300b), which will be described later, inside the gear box (200). The gear box (200) is an example of a housing portion (200) of the present disclosure.

[0087] The gear box (200) is disposed below the drain pan (50). The gear box (200) is disposed on the right side of the right side surface portion (81c) of the flow path inner wall portion (81). The gear box (200) is fixed to the right side surface portion (81c).

[0088] The gear box (200) is disposed above the bottom panel (44) of the casing (40) and at a predetermined interval from the bottom panel (44). The predetermined interval may be a distance at which the bottom surface of the gear box (200) is not in contact with the top surface of the bottom panel (44). Preferably, the gear box (200) may be as far from the bottom panel (44) as possible. As described above, since the gear box (200) is located at a position floating from the bottom panel (44), even if the bottom panel (44) is wet with water, the water is prevented from entering the gear box (200). When the suction grille (41a) and the first body frame (47) are removed from the gear box (200) in front view of the indoor unit (30), the entire gear box (200) is exposed (see FIG. 4).

[0089] As illustrated in FIG. 9, the gear box (200) includes a right housing (200a) and a left housing (200b). Both housings (200a and 200b) are combined such that the right housing (200a) houses the left housing (200b). Specifically, the right housing (200a) has a first upper surface portion (201), a first front surface portion (202), a first bottom surface portion (203), and a first side surface portion (204). The left housing (200b) has a second upper surface portion (206), a second front surface portion (207), a second bottom surface portion (208), and a second side surface portion (209). In a state where the right housing (200a) and the left housing are combined, the first upper surface portion (201) is covered with the second upper surface portion (206) from above, and the first front surface portion (202) is covered with the second front surface portion (207) from ahead.

[0090] That is, the upper surface and the front surface of the gear box (200) have a double structure. As a result, for example, even if water droplets adhere to the upper surface of the gear box (200), the water is prevented from easily entering the gear box (200). 2025202215   27 Mar 2025

[0091] By combining the right housing (200a) and the left housing (200b) in this manner, the second upper surface portion (206) constitutes the upper surface of the gear box (200), and the second front surface portion (207) constitutes the front surface of the gear box (200) (see FIG. 11). The first side surface portion (204) constitutes the right side surface of the gear box (200), and the second side surface portion (209) constitutes the left side surface of the gear box (200). The first bottom surface portion (203) constitutes the right side portion of the bottom surface of the gear box (200), and the second bottom surface portion (208) constitutes the left side portion of the bottom surface of the gear box (200).

[0092] As illustrated in FIGS. 9 and 12, a drive mechanism fixing portion (211) and a sensor box housing space (231) are formed in the gear box (200).

[0093] The drive mechanism fixing portion (211) is provided at an upper part and a rear part in the gear box (200). The drive mechanism fixing portion (211) fixes the drive mechanism (100) and the rotary shaft member (120) in the gear box (200). The drive mechanism fixing portion (211) is an example of the first attachment portion (211).

[0094] Specifically, the drive mechanism fixing portion (211) includes a motor fixing portion (211a), a gear fixing portion (211b), and a rotary shaft member fixing portion (211c). The motor fixing portion (211a) fixes the motor (101). The motor fixing portion (211a) is formed near the center in the front-rear direction in the upper part in the gear box. The gear fixing portion (211b) is formed behind the motor fixing portion (211a) so as to be in contact with a lower part of the motor fixing portion (211a). The rotary shaft member fixing portion (211c) is located at the rearmost and in a lower part in the gear box (200). The rotary shaft member fixing portion (211c) is formed behind the gear fixing portion (211b) so as to be in contact with a lower part of the gear fixing portion (211b). In this manner, the motor fixing portion (211a), the gear fixing portion (211b), and the rotary shaft member fixing portion (211c) are provided continuously in order from the front to the rear of the gear box (200). In addition, the drive mechanism fixing portion (211), the motor fixing portion (211a), and the gear fixing portion (211b) are aligned in this way, whereby the drive mechanism fixing portion (211) is formed to be inclined downward from the front to the rear of gear box (200).

[0095] As illustrated in FIGS. 7 and 12, when the drive mechanism (100) in the gear box (200) is viewed from above, the motor (101), the gear (110), and the rotary shaft member (120) are 2025202215   27 Mar 2025 disposed in order from the front. The output shaft (102) of the motor (101) is located behind the center of the motor (101). In addition, when the drive mechanism (100) of the gear box (200) is viewed from the side, a shaft center of the output shaft (102) of the motor (101) is disposed above a shaft center of the gear (110). A shaft center of the rotary shaft member (120) is located below the shaft center of the gear (110).

[0096] A shaft center A1 of the output shaft (102), a shaft center A2 of the gear (110), and a shaft center A3 of the rotary shaft member (120) are not aligned on the same straight line. Specifically, an inclination angle of a straight line connecting the shaft center A1 of the output shaft (102) and the shaft center A2 of the gear (110) with respect to the horizontal line is smaller than an inclination angle of a straight line connecting the shaft center A2 of the gear (110) and the shaft center A3 of the rotary shaft member (120) with respect to the horizontal line.

[0097] With such an arrangement, the three members of the motor (101), the gear (110), and the rotary shaft member (120) can be disposed so as to be close to each other. As a result, the space in the gear box (200) can be saved, and the gear box (200) can be downsized.

[0098] As illustrated in FIGS. 9 and 12, the drive mechanism fixing portion (211) includes a wiring housing portion (221) that houses wiring. The wiring housing portion (221) is a space in which the electric wiring (H2) and the sensor wiring of the refrigerant sensor (140) to be described later are disposed.  The wiring housing portion (221) is disposed in front of the motor fixing portion (211a).  The wiring housing portion (221) is disposed above a sensor box (300) to be described later. In other words, the wiring housing portion (221) is disposed above a sensor fixing portion (300b) to be described later. The electric wiring (H2) and the sensor wiring (H1) extend to the outside through an insertion hole (215) to be described later (see FIG. 11).

[0099] (7) Sensor Box As illustrated in FIGS. 9 and 10, the sensor box (300) is a member that houses the refrigerant sensor (140). Thus, the refrigerant sensor (140) is housed in the gear box (200). The sensor box (300) is an example of a housing case (300).

[0100] The sensor box (300) is housed in the sensor box housing space (231) formed in the gear box (200). The sensor box housing space (231) is an example of a housing space (231). 2025202215   27 Mar 2025 The sensor box housing space (231) is formed in a lower part in the gear box (200). Specifically, the sensor box housing space (231) is formed closer to the front in a lower part in the gear box (200). More specifically, the sensor box housing space (231) is formed in a space formed below the motor fixing portion (211a) which is a part of the drive mechanism fixing portion (211). The sensor box housing space (231) is formed in a space formed in front of the rotary shaft member fixing portion (211c) which is a part of the drive mechanism fixing portion (211).

[0101] The sensor box (300) is housed in a sensor box housing portion (200) through an opening (232) provided in the gear box (200). The opening (232) is provided in a front surface of the gear box (200). Specifically, the opening (232) is formed in the first front surface portion (202) and the second front surface portion (207). The opening (232) communicates with the sensor box housing space (231) and is opened toward the front panel portion (41). In this way, the sensor box (300) is attached to or removed from inside the gear box (200) via the opening (232) in the front surface of the gear box (200).

[0102] As illustrated in FIGS. 8 to 10, the sensor box (300) includes a front wall portion (300a) and the sensor fixing portion (300b). The front wall portion (300a) is a member that closes the opening (232) in a state where the sensor box (300) is housed in the sensor box housing space (231). An attachment hole (301) is provided in the front wall portion (300a). The attachment hole (301) is a hole through which a fastening member (B) such as a screw is inserted. The sensor box (300) and the gear box (200) are fastened by inserting the fastening member (B) into the attachment hole (301).

[0103] The refrigerant sensor (140) is attached to the sensor fixing portion (300b).  The sensor fixing portion (300b) is an example of the second attachment portion (300b).  In other words, the sensor fixing portion (300b) constitutes the sensor box (300) that houses the refrigerant sensor (140).

[0104] The sensor fixing portion (300b) is formed in a frame shape. The substrate (142) of the refrigerant sensor (140) is attached in a frame of the sensor fixing portion (300b). A cylindrical portion of the detection element (141) of the refrigerant sensor (140) extends downward from the sensor fixing portion (300b). 2025202215   27 Mar 2025

[0105] The sensor fixing portion (300b) is formed to extend rearward from a substantially central height position of the front wall portion (300a). The sensor fixing portion (300b) is disposed closer to the front panel portion (41) than the rotary shaft member (120). Specifically, the sensor fixing portion (300b) is disposed closer to the front panel portion (41) than the drive mechanism fixing portion (211).

[0106] The sensor fixing portion (300b) is provided such that at least a part of the drive mechanism fixing portion (211) is located above the sensor fixing portion (300b) when viewed from the front of the gear box (200). Specifically, in the sensor fixing portion (300b), a part of the motor fixing portion (211a) in the drive mechanism fixing portion (211) is located above the sensor fixing portion (300b). In addition, the sensor fixing portion (300b) is disposed below the output shaft (102) of the motor (101). The sensor fixing portion (300b) is disposed directly below the wiring housing portion (221).

[0107] The sensor fixing portion (300b) is disposed such that a part of the sensor fixing portion (300b) overlaps with the motor (101) when the inside of the gear box (200) is viewed from above. In other words, when the sensor fixing portion (300b) and the motor (101) are viewed from above directly downward, a part of the rear portion of the sensor fixing portion (300b) and a part of the front portion of the motor (101) overlap with each other.

[0108] How to attach the sensor box (300) will be described with reference to FIG. 10. The sensor box (300) is inserted into the sensor box housing space (231) from the front through the opening (232). The sensor fixing portion (300b) is inserted until the front wall portion (300a) is closed by the opening (232), and then the fastening member (B) is inserted into the attachment hole (301). As a result, the sensor box (300) is fixed to the gear box (200). When the sensor box (300) is removed from the gear box (200), the fastening member (B) is removed from the attachment hole (301), and the sensor box (300) is pulled out forward.

[0109] As described above, the gear box (200) is disposed so as to face the front panel portion (41). Since the sensor box (300) can be attached or removed via the opening (232) of the gear box (200), the sensor box (300) is also disposed so as to face the front panel portion (41). That is, the gear box (200) and the sensor box (300) are disposed so as to face the front panel portion (41). In addition, the gear box (200) is disposed below the drain pan (50). The gear box (200) is disposed on a side of the damper (90). 2025202215   27 Mar 2025

[0110] (8) Posture of Wiring Connected to Gear Box Next, the posture of the electric wiring (H2) connected to the gear box (200) will be described.

[0111] As illustrated in FIG. 11, the gear box (200) has the insertion hole (215). The insertion hole (215) is formed at a height position above the sensor fixing portion (300b). The insertion hole (215) is a hole through which the sensor wiring (H1) and the electric wiring (H2) are inserted so that the sensor wiring (H1) and the electric wiring (H2) extend to the outside of the gear box (200).

[0112] The insertion hole (215) is formed in the first side surface portion (204) of the gear box (200).  The insertion hole (215) is formed in an upper part of the first side surface portion (204) and closer to the front. Specifically, the insertion hole (215) is formed by combination between the right housing (200a) and the left housing (200b). The insertion hole (215) communicates with a notch (216) formed in the first front surface portion (202) (see FIG. 9). The notch (216) is formed by notching leftward from the first front surface portion (202).

[0113] The electric wiring (H2) and the sensor wiring (H1) extend upward from the inside of the gear box (200) toward the electric component box (65) through the insertion hole (215). In this manner, the sensor wiring (H1) extends to the electric component box (65) together with the electric wiring (H2) of the motor (101). The electric wiring (H2) and the sensor wiring (H1) extending from the insertion holes (215) to the electric component box (65) are bundled into one bundle.

[0114] The electric wiring (H2) and the sensor wiring (H1) are inserted into the notch (216) to dispose the insertion hole (215) before the left housing (200b) is combined with the right housing (200a). Thereafter, the left housing (200b) is combined with the right housing (200a), so that the electric wiring (H2) and the sensor wiring (H1) are inserted through the insertion hole (215).

[0115] A hook portion (220) is formed on the first side surface portion (204). The hook portion (220) is formed such that a tip thereof is curved downward. The hook portion (220) is a restricting member (220) that restricts arrangement of the electric wiring (H2) and the sensor wiring (H1). The hook portion (220) is disposed below the insertion hole (215). The hook portion (220) is disposed behind the insertion hole (215). Accordingly, the first wiring (H1) 2025202215   27 Mar 2025 and the second wiring (H2) extend downward from the insertion hole (215) and then extend upward toward the electric component box (65).

[0116] (9) Characteristics (9-1) Characteristics 1 The indoor unit (30) of the present embodiment includes the damper (90) that opens and closes the lower flow path (P1), the drive mechanism (100) that drives the damper (90), the refrigerant sensor (140) that detects a refrigerant leaking into the casing (40), the gear box (200) to which the drive mechanism (100) is attached, and the sensor box (300) to which the refrigerant sensor (140) is attached. The gear box (200) includes the first attachment portion (211) to which the drive mechanism (100) is attached, and houses the sensor box (300). The sensor box (300) includes the second attachment portion (300b) to which the refrigerant sensor (140) is attached. In this manner, the first attachment portion (211) and the second attachment portion (300b) are disposed inside the gear box (200), and the gear box (200) houses the drive mechanism (100) and the refrigerant sensor (140). The gear box (200) is disposed so as to face the front panel portion (41) constituting the casing (40).

[0117] According to the present embodiment, since the gearbox (200) faces the front panel portion (41), the operator can inspect the inside of the gear box (200) from the front side only by removing the front panel. In addition, since the drive mechanism (100) and the refrigerant sensor (140) are housed in the same gear box (200), inspection of both the drive mechanism (100) and the refrigerant sensor (140), component replacement, and the like can be performed only by opening the gear box (200). In this manner, maintainability of the drive mechanism (100) and the refrigerant sensor (140) in the gear box (200) is improved.

[0118] (9-2) Characteristics 2 In the indoor unit (30) of the present embodiment, the sensor fixing portion (300b) is disposed closer to the front panel portion (41) than the drive mechanism fixing portion (211). With such an arrangement, the length in the width direction (left-right direction) of the casing (40) can be shortened as compared with a case where the drive mechanism fixing portion (211) and the sensor fixing portion (300b) are arranged side by side in the width direction of the casing (40). Accordingly, a product of the indoor unit (30) can be downsized. 2025202215   27 Mar 2025

[0119] (9-3) Characteristics 3 In the indoor unit (30) of the present embodiment, the sensor fixing portion (300b) is provided such that at least a part of the drive mechanism fixing portion (211) is located above the sensor fixing portion (300b) when viewed from the front of the gear box (200). As a result, the refrigerant sensor (140) can be disposed below the drive mechanism fixing portion (211), so that a space below the drive mechanism fixing portion (211) can be effectively used. Accordingly, the downsizing of the indoor unit (30) can be achieved.

[0120] (9-4) Characteristics 4 In the indoor unit (30) of the present embodiment, the sensor fixing portion (300b) is disposed closer to the front panel portion (41) than the rotary shaft member (120).

[0121] With such a configuration, the sensor fixing portion (300b) is disposed closer to the front panel portion (41), so that operations of removing and attaching the refrigerant sensor (140) from the front can be easily performed.

[0122] (9-5) Characteristics 5 In the indoor unit (30) of the present embodiment, at least a part of the sensor fixing portion (300b) is disposed below the output shaft (102).

[0123] With such a configuration, since the sensor fixing portion (300b) can be disposed in a space below the output shaft (102) of the motor (101), the space below the motor (101) can be effectively used.

[0124] (9-6) Characteristics 6 In the indoor unit (30) of the present embodiment, the sensor fixing portion (300b) is disposed such that at least a part of the sensor fixing portion (300b) overlaps with the motor (101) when viewed from above.

[0125] With such a configuration, by disposing the sensor fixing portion (300b) in the space immediately below the output shaft (102) of the motor (101), the space immediately below the 2025202215   27 Mar 2025 motor (101) can be effectively used.

[0126] (9-7) Characteristics 7 The indoor unit (30) of the present embodiment further includes the electric component box (65) that is disposed above the drive mechanism fixing portion (211) and houses a predetermined electric component. The sensor wiring (H1) of the refrigerant sensor (140) extends to the electric component box (65) together with the electric wiring (H2) of the motor (101) via the drive mechanism fixing portion (211).

[0127] With such a configuration, the layout can be made such that the wiring of the refrigerant sensor (140) and the wiring of the motor (101) are aligned. As a result, it is possible to prevent the wiring from interfering with the work at the time of removing other components.

[0128] (9-8) Characteristics 8 In the indoor unit (30) of the present embodiment, the gear box (200) is formed at a height position above the sensor fixing portion (300b), and has the insertion hole (215) through which the sensor wiring (H1) and the electric wiring (H2) are inserted so as to extend to the outside of the gear box (200). The gear box (200) further includes the hook portion (220) that restricts arrangement of the sensor wiring (H1) and the electric wiring (H2) such that the sensor wiring (H1) and the electric wiring (H2) extend downward from the insertion hole (215) and then extend upward toward the electric component box (65).

[0129] With such a configuration, water droplets adhered to the electric wiring (H2) or the sensor wiring (H1) flow toward the hook portion (220) along the electric wiring (H2) or the sensor wiring (H1) and thus, can be prevented from entering the drive mechanism fixing portion (211). As a result, it is possible to suppress failure of the motor (101) and the refrigerant sensor (140).

[0130] (9-9) Characteristics 9 In the indoor unit (30) of the present embodiment, the gear box (200) is disposed on a side of the damper (90). 2025202215   27 Mar 2025

[0131] With such a configuration, the gear box (200) can be disposed by effectively using the space on a side of the damper (90).

[0132] (9-10) Characteristics 10 In the indoor unit (30) of the present embodiment, the gear box (200) is disposed below the drain pan (50).

[0133] With such a configuration, the gear box (200) can be disposed by effectively using the space below the drain pan (50). The product (indoor unit (30)) can be downsized by effectively using the empty space in this manner.

[0134] (9-11) Characteristics 11 In the indoor unit (30) of the present embodiment, the gear box (200) is disposed above the bottom panel (44) of the casing (40) and at a predetermined interval from the bottom panel (44).

[0135] With such a configuration, a gap is formed between a lower surface of the gear box (200) and an upper surface of the bottom panel (44). As described above, since the gear box (200) is provided at a position floating from the bottom panel (44), even if water accumulates on the bottom panel (44) due to water leakage occurring in the casing (40), it is possible to prevent water from entering the inside of the gear box (200). As a result, it is possible to suppress a failure of the refrigerant sensor (140) due to water immersion.

[0136] (9-12) Characteristics 12 In the indoor unit (30) of the present embodiment, the gear box (200) has the sensor box housing space (231) formed in a lower part of the gear box (200), and the opening (232) communicating with the sensor box housing space (231) and opened toward the front panel portion (41). The sensor box (300) is housed in the sensor box housing space (231) through the opening (232).

[0137] With such a configuration, the sensor box (300) in which the refrigerant sensor (140) is housed can be taken out from the gear box (200) through the opening (232). As described 2025202215   27 Mar 2025 above, since only the refrigerant sensor (140) can be taken out from the gear box (200), maintainability such as replacement of the refrigerant sensor (140) can be improved.

[0138] (10) Other Embodiments For example, the above embodiments may adopt the following configurations.

[0139] The indoor unit (30) of the air conditioner (10) may be a wall-hanging type or a ceiling-installed type. The air conditioner (10) may be a humidity controller that adjusts the humidity of the target space, an air cleaner that cleans the air in the target space, or a ventilator that ventilates the target space.

[0140] The opening / closing member (90) may open and close a blow-out port such as the first blow-out port (51) and the second blow-out port (54). In this case, such a blow-out port constitutes the first flow path (P1). The opening / closing member (90) may be, for example, a flap that opens and closes the blow-out port of a wall-hanging type indoor unit. The opening / closing member (90) may open and close the air flow path of the outdoor unit. The opening / closing member (90) may be a shutter or a ball valve by the drive mechanism (100).

[0141] The gear box (200) may be provided in the outdoor unit (20).

[0142] The gear box (200) and the sensor box (300) may be separate bodies. In other words, the sensor box (300) does not need to be housed in the gear box (200).

[0143] The drive mechanism fixing portion (211) only need to be any member to which the drive mechanism (100) is attached, and does not need to be a member that houses the drive mechanism (100) like the gear box (200). In this case, the gear box (200) houses the drive mechanism fixing portion (211) and the sensor fixing portion (300b).

[0144] The drive mechanism (100) may be housed in a case provided with the drive mechanism fixing portion (211). In this case, the housing portion (200) houses the case and the sensor box (300).

[0145] The suction grill (41a) may constitute the front panel portion (41) of the casing (40). In this case, when the suction grill (41a) is removed from the casing (40), the gear box (200) 2025202215   27 Mar 2025 may be disposed so as to be exposed to the outside when the indoor unit (30) is viewed from the front. In other words, the first attachment portion (211) and the second attachment portion (300b) are exposed to the outside.

[0146] The gear box (200) may be used as the first attachment portion (211). In addition, the sensor box (300) may be used as the second attachment portion (300b).

[0147] The drive mechanism fixing portion (211) may be only the motor fixing portion (211a).

[0148] At least a part of the sensor fixing portion (300b) only need to be disposed below the output shaft (102). In addition, the refrigerant sensor (140) attached to the sensor fixing portion (300b) may be disposed below the output shaft (102).

[0149] The sensor fixing portion (300b) may be disposed such that the entire sensor fixing portion (300b) overlaps with the motor (101) when viewed from above.

[0150] The sensor fixing portion (300b) may be provided such that the entire drive mechanism fixing portion (211) is located above the sensor fixing portion (300b) when viewed from the front of the gear box (200), or such that the motor fixing portion (211a) is located above the sensor fixing portion (300b).

[0151] The sensor fixing portion (300b) may be provided so as to be disposed directly below at least a part of the drive mechanism fixing portion (211) when viewed from the front of the gear box (200). This configuration prevents increase in length of the casing (40) in the width direction (left-right direction), thereby achieving downsizing of the indoor unit (30).

[0152] The sensor fixing portion (300b) may be disposed directly below at least a part of the drive mechanism fixing portion (211) or may be disposed directly below the entire drive mechanism fixing portion (211) when the inside of the gear box is viewed from above. As a result, a space below the drive mechanism fixing portion (211) can be effectively used.

[0153] The sensor wiring (H1) of the refrigerant sensor (140) only needs to extend to the electric component box (65) together with the electric wiring (H2) of the motor (101), and does not need to pass through the drive mechanism fixing portion (211). 2025202215   27 Mar 2025

[0154] The embodiments and the modifications have been described above, but it will be understood that various changes can be made to modes and details without departing from the spirit and the scope of the claims. The above embodiments and the modifications may be combined or replaced as appropriate as long as target functions of the present disclosure are not impaired.  The above-described terms “first”, “second”, ... are just used to distinguish words to which these terms are attached, and do not limit the number or order of the words.

[0155] As described above, the present disclosure is useful for an air conditioner.

Claims

1. An air conditioner comprising:a casing (40) having an air flow path (P);a first flow path (P1) included in the air flow path (P);an opening / closing member (90) that opens and closes the first flow path (P1);a drive mechanism (100) that drives the opening / closing member (90);a refrigerant sensor (140) that detects a refrigerant leaking into the casing (40);a first attachment portion (211) to which the drive mechanism (100) is attached;a second attachment portion (300b) to which the refrigerant sensor (140) is attached; anda housing portion (200) having the first attachment portion (211) and the second attachment portion (300b) therein such that the first attachment portion (211) and the second attachment portion (300b) are disposed facing a front panel portion (41) constituting the casing (40).

2. The air conditioner according to claim 1,wherein the second attachment portion (300b) is disposed closer to the front panel portion (41) than the first attachment portion (211).

3. The air conditioner according to claim 1,wherein the second attachment portion (300b) is provided such that at least a part of the first attachment portion (211) is located above the second attachment portion (300b) when viewed from the front of the housing portion (200).

4. The air conditioner according to any one of claims 1 to 3, further comprising a rotary shaft member (120) that connects the opening / closing member (90) and the drive mechanism (100), wherein the drive mechanism (100) includes:a motor (101) having an output shaft (102); anda gear (110) that transmits a rotational force of the motor (101) to the rotary shaft member (120), andthe second attachment portion (300b) is disposed closer to the front panel portion (41) than the rotary shaft member (120).2025202215   27 Mar 20255. The air conditioner according to claim 4,wherein a shaft center of the output shaft (102) is disposed above a shaft center of the gear (110), andthe refrigerant sensor (140) attached to at least a part of the second attachment portion (300b) or the second attachment portion (300b) is disposed below the output shaft (102).

6. The air conditioner according to claim 4,wherein the second attachment portion (300b) is disposed such that at least a part of the second attachment portion (300b) overlaps with the motor (101) when viewed from above.

7. The air conditioner according to claim 4, further comprisingan electric component box (65) that is disposed above the housing portion (200) and houses a predetermined electric component,wherein a first wiring (H1) of the refrigerant sensor (140) extends from the housing portion (200) to the electric component box (65) together with a second wiring (H2) of the motor (101).

8. The air conditioner according to claim 7,wherein the housing portion (200) is formed at a height position above the second attachment portion (300b) and has an insertion hole (215) through which the first wiring (H1) and the second wiring (H2) are inserted so as to extend to the outside of the housing portion (200), andfurther includes a restricting member (220) that restricts arrangement of the first wiring (H1) and the second wiring (H2) such that the first wiring (H1) and the second wiring (H2) extend downward from the insertion hole (215) and then extend upward toward the electric component box (65).

9. The air conditioner according to any one of claims 1 to 3,wherein the housing portion (200) is disposed on a side of the opening / closing member (90).

10. The air conditioner according to any one of claims 1 to 3, further comprising:a heat exchanger (31) disposed in the air flow path (P); anda drain pan (50) disposed below the heat exchanger (31),2025202215   27 Mar 2025wherein the housing portion (200) is disposed below the drain pan (50).

11. The air conditioner according to any one of claims 1 to 3,wherein the casing (40) includes a bottom plate (44) constituting a bottom surface of thecasing (40), andthe housing portion (200) is disposed above the bottom plate (44) and at a predetermined interval from the bottom plate (44).

12. The air conditioner according to any one of claims 1 to 3,wherein the first attachment portion (211) constitutes the housing portion (200) thathouses the drive mechanism (100),the second attachment portion (300b) constitutes a housing case (300) that houses the refrigerant sensor (140),the housing portion (200) includes:a housing space (231) formed in a lower part of the housing portion (200); andan opening (232) communicating with the housing space (231) and opened toward the front panel portion (41), andthe housing case (300) is housed in the housing space (231) through the opening (232).

13. The air conditioner according to any one of claims 1 to 3, further comprisinga heat exchanger (31) disposed in the air flow path (P) and functioning as a radiator and an evaporator,wherein the casing (40) includes:a first blow-out port (51) that blows out air in the air flow path (P) into a target space; anda second blow-out port (54) that is located above the first blow-out port (51) and blows out the air in the air flow path (P) into the target space, andthe first flow path (P1) is the first blow-out port (51) or a flow path continuous with the first blow-out port (51).

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