air conditioning equipment

Abstract

To restrain contact between a rotation shaft connected to an opening / closing member and a seal member.SOLUTION: An air conditioning device comprises: a rotation shaft member (80) which penetrates a hole (H1) of a partition part (45), connects a drive mechanism (70) with an opening / closing member (51), and is driven for rotation by the drive mechanism (70); a cylindrical bearing member (60) located in the hole (H1) and rotatably supporting the rotation shaft member (80) on the inside; and a seal member (95) arranged between an inner peripheral surface forming the hole (H1) and an outer peripheral surface of the bearing member (60).SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to an air conditioning apparatus. [Background technology]

[0002] Patent Document 1 discloses an air conditioner. This air conditioner has a casing with an air outlet, a shutter that opens and closes a flow path communicating with the air outlet, a rotating shaft connected to the shutter, and a motor that rotates the rotating shaft. A partition separates the space that houses the motor from the flow path in which the shutter is provided. The rotating shaft passes through a hole in the partition and connects the shutter to the motor. With this configuration, there is a possibility that air from the flow path side will leak into the space through the hole. Therefore, the air conditioner of Patent Document 1 has a labyrinth seal structure around the hole to prevent such air leakage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-78273 Summary of the Invention [Problem to be solved by the invention]

[0004] One possible solution to prevent air leakage, as disclosed in Patent Document 1, is to provide a sealing material such as resin on the space side to cover the gap in the hole in the partition. Specifically, a sealing material is provided on the surface of the partition facing the motor housing space to close the gap in the hole. However, with this configuration, there is a possibility that the sealing material will come into contact with the rotating shaft. If the sealing material comes into contact with the rotating shaft, the sealing material may get caught in the rotating shaft or the torque of the rotating shaft may increase, making it impossible to stably switch the state of the shutter (opening / closing member).

[0005] An object of the present disclosure is to prevent contact between a rotating shaft connected to an opening / closing member and a sealing member. [Means for solving the problem]

[0006] The first aspect is directed to an air conditioner (10). The air conditioner (10) includes a casing (31) having an air flow path (P), a partition (45) having a hole (H1) that separates a first flow path (41) included in the air flow path (P) from a first space (S1), an open / close member (51) that opens and closes the first flow path (41), a drive mechanism (70) arranged in the first space (S1), a rotating shaft member (80) that passes through the hole (H1) of the partition (45), connects the drive mechanism (70) and the open / close member (51), and is driven to rotate by the drive mechanism (70), a cylindrical bearing member (60) located within the hole (H1) and rotatably supports the rotating shaft member (80), and a seal member (95) arranged between an inner circumferential surface that defines the hole (H1) and an outer circumferential surface of the bearing member (60).

[0007] In the first aspect, a cylindrical bearing member (60) is provided inside the partition (45). The bearing member (60) rotatably supports the rotating shaft member (80) therein. The seal member (95) is disposed between the inner circumferential surface of the hole (H1) and the outer circumferential surface of the bearing member (60). The seal member (95) prevents air from the first flow path (41) from leaking into the first space (S1) through a gap between the inner circumferential surface of the hole (H1) and the outer circumferential surface of the bearing member (60). The bearing member (60) is provided between the seal member (95) and the rotating shaft member (80), thereby preventing the rotating shaft member (80) from coming into contact with the seal member (95) during rotation.

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

[0009] In the second aspect, the cylindrical bearing member (60) extends from the storage chamber (S2) to the hole (H1). Therefore, even if air in the first flow path (41) leaks into the gap between the bearing member (60) and the rotating shaft member (80), the air is sent to the storage chamber (S2) of the storage member (55). This prevents the air in the first flow path (41) from leaking out to the first space (S1) (outside the storage member (55)). As a result, it is possible to prevent condensation from occurring in the first space (S1) or around the first space (S1).

[0010] In the third aspect, in the second aspect, the drive mechanism (70) includes a motor (71) having an output shaft (71b) and a gear mechanism (G) that transmits the rotational force of the output shaft (71b) of the motor (71) to the rotating shaft member (80).

[0011] In the third aspect, the position of the motor (71) and the position of the rotating shaft member (80) can be shifted in the radial direction of the rotating shaft member (80). As a result, air sent into the housing member (55) through the gap between the bearing member (60) and the rotating shaft member (80) is less likely to hit the motor (71), thereby preventing condensation from forming near the motor (71).

[0012] In the fourth embodiment, the axis of the output shaft (71b) of the motor (71) in the third embodiment is positioned above the axis of the rotating shaft member (80).

[0013] In the fourth aspect, even if air leaks from inside the bearing member (60) into the housing member (55) and condensation occurs inside the housing member (55), the condensation is less likely to adhere to the motor (71).

[0014] In a fifth aspect, in the third or fourth aspect, the gear mechanism (G) includes a driven gear (83) provided on the rotary shaft member (80).

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

[0016] In a sixth aspect, in any one of the second to fifth aspects, the rotating shaft member (80) has a rotating shaft main body (81) and a flange portion (90) extending radially outward from the rotating shaft main body (81) so as to close an opening (61) of the bearing member (60) on the side of the drive mechanism (70).

[0017] In the sixth aspect, the flange (90) of the rotating shaft body (81) closes the opening (61) of the bearing member (60) on the side of the drive mechanism (70), thereby preventing air from leaking from inside the rotating shaft member (80) into the housing member (55).

[0018] In a seventh aspect, in the sixth aspect, the air conditioner (10) further includes a labyrinth seal structure (L) that seals the gap between the bearing member (60) and the flange portion (90).

[0019] In the seventh aspect, it is possible to prevent air from leaking from inside the rotary shaft member (80) into the housing member (55) through the gap between the bearing member (60) and the flange (90).

[0020] In an eighth aspect, in any one of the first to seventh aspects, the bearing member (60) has a first bearing portion (63) located closer to the opening / closing member (51) and with which the rotating shaft member (80) makes sliding contact, and a second bearing portion (64) located closer to the drive mechanism (70) and with which the rotating shaft member (80) makes sliding contact.

[0021] In the eighth aspect, the bearing member (60) supports the rotating shaft member (80) by the first bearing portion (63) and the second bearing portion (64). This makes it possible to suppress misalignment of the rotating shaft member (80) and reduce the frictional resistance of the rotating shaft member (80).

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

[0023] In the ninth aspect, the bearing member (60) can be insulated by the seal member (95), which prevents condensation on the outer surface of the bearing member (60) caused by air flowing through the inside of the bearing member (60).

[0024] In a tenth aspect, in any one of the first to ninth aspects, the partition (45) has a partition main body (45a) and a tubular portion (45b) extending from the partition main body (45a) in the axial direction of the rotary shaft member (80) and having a hole (H1). The seal member (95) is disposed between the inner circumferential surface of the tubular portion (45b) and the outer circumferential surface of the bearing member (60).

[0025] In the tenth aspect, the sealing length of the seal member (95) in the axial direction of the bearing member (60) is increased, thereby improving the sealing performance of the seal member (95).

[0026] An eleventh aspect is any one of the first to tenth aspects, wherein the sealing member (95) is made of a flexible sheet-like member.

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

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

[0029] In the twelfth aspect, an operation can be performed in which, while the opening / closing member (51) closes the first flow path (41), air cooled by the heat exchanger (32) functioning as an evaporator is supplied to the target space (I) through the second outlet (40). This operation can prevent a user in the target space (I) from feeling a cold draft. In this operation, the first flow path (41) on the first outlet (37) side is closed, which particularly facilitates leakage of cool air from the first flow path (41) into the first space (S1). The leakage of cool air can easily cause condensation to form in the first space (S1). In contrast, in the twelfth aspect, the sealing member (95) can prevent air leakage. Furthermore, contact between the sealing member (95) and the rotating rotating shaft member (80) can be prevented. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1 is a schematic piping diagram of a refrigerant circuit of an air conditioner. [Figure 2] FIG. 2 is a perspective view showing the appearance of the indoor unit. [Figure 3] FIG. 3 is a view of the interior of the indoor unit as seen from the front side. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a perspective view showing the appearance of the motor case. [Figure 6] FIG. 6 is a view of the inside of the motor case from the right side with the second case portion removed. [Figure 7] FIG. 7 is a cross-sectional view taken along line BB in FIG. 6 in a state where the second case portion is attached. [Figure 8] FIG. 8 is a perspective view of the rotating shaft member. [Figure 9] FIG. 9 is an enlarged view of the area surrounded by line C in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0032] (1) Overall configuration of the air conditioning unit As shown in FIG. 1, the air conditioner (10) has an outdoor unit (20) and an indoor unit (30). The air conditioner (10) is a separate type in which the outdoor unit (20) and the indoor unit (30) are connected via two communication pipes (12, 13). This connection forms a refrigerant circuit (11). The refrigerant circuit (11) is filled with refrigerant. The refrigerant circuit (11) performs a refrigeration cycle. The air conditioner (10) conditions an indoor space (I), which is a target space. Specifically, the air conditioner (10) performs a cooling operation and a heating operation.

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

[0034] The compressor (21) compresses the drawn refrigerant. The compressor (21) discharges the compressed refrigerant. The outdoor heat exchanger (22) exchanges heat between the refrigerant flowing therethrough and outdoor air by means of the outdoor fan (25). The outdoor fan (25) transports outdoor air to the outdoor heat exchanger (22). The expansion valve (23) reduces the pressure of the refrigerant. The expansion valve (23) is an electronic expansion valve whose opening is adjustable. The four-way selector valve (24) switches the flow path of the refrigerant circuit (11). The four-way selector valve (24) is switched between a first state indicated by a solid line in FIG. 1 and a second state indicated by a dashed line in FIG. 1. The four-way selector valve (24) is in the first state during cooling operation and in the second state during heating operation.

[0035] (3) Indoor unit The indoor unit (30) will be described with reference to Figures 2 to 4. In the following description, terms such as "upper," "lower," "front," "rear," "right," and "left" generally refer to the directions shown in Figures 2 to 4.

[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 (50). The indoor unit (30) is installed on the floor of the indoor space (I). The indoor unit (30) is a floor-standing type.

[0037] (3-1) Casing The casing (31) is formed in a generally rectangular box shape. The casing (31) has a front plate (31a), a rear 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 rear plate (31b) is formed on the rear 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 bottom side of the casing (31), and the top plate (31f) is formed on the top side of the casing (31).

[0038] A first air outlet (37) is formed in the lower part of the front plate (31a). In other words, the first air outlet (37) is located in the lower part of the casing (31). The first air outlet (37) is an elongated hole extending in the left-right direction. As shown in FIG. 4, a plurality of vertical blades (38) aligned in the left-right direction are provided in the first air outlet (37). The plurality of vertical blades (38) adjust the direction of air blown out from the first air outlet (37) into the room space (I) to the left or right.

[0039] The front plate (31a) has a plurality of suction openings (39). The suction openings (39) are located above the first outlet (37). The suction openings (39) are formed of a plurality of slits extending in the left-right direction. The plurality of suction openings (39) are aligned in the up-down direction.

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

[0041] The casing (31) has an air flow path (P). The air flow path (P) extends from the plurality of inlets (39) to the first outlet (37) and the second outlet (40). The air flow path (P) includes a lower flow path (41) and an upper flow path (42). The lower flow path (41) extends from the downstream side of the indoor fan (34) to the first outlet (37). The lower flow path (41) is located in the lower part of the casing (31). The upper flow path (42) extends from the downstream side of the indoor fan (34) to the second outlet (40). The upper flow path (42) is located in the upper part of the casing (31). In this embodiment, the lower flow path (41) constitutes the first flow path.

[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 on the rear side of the front plate (31a). The indoor heat exchanger (32) exchanges heat between the refrigerant and the indoor air transported by the indoor fan (34). The indoor heat exchanger (32) is of a fin-and-tube type. The indoor heat exchanger (32) functions as a radiator and an evaporator. The indoor heat exchanger (32) functioning as a radiator heats the air in the air flow path (P). The indoor heat exchanger (32) functioning as an evaporator cools the air in the air flow path (P).

[0043] (3-3) Bellmouth The bell mouth (33) shown in Fig. 3 is disposed behind the indoor heat exchanger (32). The bell mouth (33) guides the air that has passed through the indoor heat exchanger (32) to the indoor fan (34).

[0044] (3-4) Indoor fan The indoor fan (34) shown in FIG. 4 is disposed behind the bell mouth (33). The indoor fan (34) is a centrifugal fan, specifically a turbofan. The indoor fan (34) includes a fan motor (34a), a fan drive shaft (34b) driven to rotate by the fan motor (34a), and an impeller (34c) connected to the fan drive shaft (34b). The fan drive shaft (34b) extends in the front-to-rear direction. When the indoor fan (34) is in operation, the air passing through the bell mouth (33) is redirected radially outward from the impeller (34c). The air flowing downward from the indoor fan (34) passes through the lower flow path (41) and is blown out through the first outlet (37) into the indoor space (I). The air flowing upward from the indoor fan (34) passes through the upper flow path (42) and is blown out through the second outlet (40) into the indoor space (I).

[0045] (3-5) Drain pan The drain pan (35) shown in Figures 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 laterally so as to overlap the entire indoor heat exchanger (32) in the vertical direction.

[0046] (3-6) Electrical equipment box The electrical component box (36) shown in Fig. 3 is disposed at the upper right end of the casing (31). The electrical component box (36) accommodates predetermined electrical components. The electrical components include a control board that controls devices such as the indoor fan (34) and receives signals from various sensors.

[0047] (3-7) Partitions and insulation As shown in FIG. 3, a partition (45) is provided in the lower part of the casing (31). The partition (45) is located near the first side plate (31c) in the lower part of the casing (31). The partition (45) forms a vertical wall extending in the up-down direction. The partition (45) divides the interior of the casing (31) into a lower flow path (41) and a first space (S1). The left surface of the partition (45) forms an inner surface that defines the lower flow path (41). The right surface of the partition (45) forms an outer surface that defines the first space (S1).

[0048] The partition (45) has a partition main body (45a) and a tubular portion (45b) extending horizontally (in a first direction, which will be described in detail later) from the partition main body (45a). The tubular portion (45b) extends from the partition main body (45a) toward the right (toward the drive mechanism (70), which will be described in detail later). The tubular portion (45b) has a first hole (H1) that penetrates the partition (45) in the thickness direction. The first hole (H1) forms a cylindrical space therein.

[0049] A heat insulating material (46) is provided in the lower part of the casing (31) on the side of the first space (S1). The heat insulating material (46) covers the outer surface (right surface) of the partition (45). The heat insulating material (46) is made of a resin material having heat insulating properties, such as polyethylene. The heat insulating material (46) has a second hole (H2). The second hole (H2) defines a cylindrical space therein. The inner diameter of the second hole (H2) is larger than the inner diameter of the first hole (H1). The axis of the second hole (H2) and the axis of the first hole (H1) are generally aligned.

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

[0051] (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), which is the first flow path. The damper unit (50) is arranged in the lower part of the casing (31). The damper unit (50) includes a damper (51), a motor case (55), a drive mechanism (70), and a rotary shaft member (80). The damper (51) is arranged in the lower flow path (41) and opens and closes the lower flow path (41). The motor case (55) and the drive mechanism (70) are arranged in the first space (S1). The motor case (55) houses the drive mechanism (70). The drive mechanism (70) is a drive source for driving the damper (51).

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

[0053] (4-1) Damper The damper (51) shown in FIGS. 3 and 4 is an example of an open / close member. The damper (51) is formed in a plate shape extending across the entire left-right direction of the lower flow path (41). The damper (51) is connected to the drive mechanism (70) via a rotary shaft member (80). The drive mechanism (70) moves the damper (51) between an 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 prevented from flowing through 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 through the lower flow path (41).

[0054] (4-2) Motor case The motor case (55) shown in FIGS. 5 to 7 is located opposite the damper (51) with the partition (45) interposed therebetween. The motor case (55) is formed hollow with its short side extending in the first direction. The motor case (55) has a first case portion (56) and a second case portion (57) located closer to one end in the first direction than the first case portion (56). The first case portion (56) is formed in a box shape with one end in the first direction open. The second case portion (57) is formed in a box shape with the other end in the first direction open. The second case portion (57) is detachably attached to the open portion of the first case portion (56). When the second case portion (57) is attached to the first case portion (56), an accommodation chamber (S2) for accommodating the drive mechanism (70) is formed inside the motor case (55).

[0055] (4-2-1) First case part 7, the first case portion (56) has a case side plate (56a) and a bearing member (60) extending leftward from the case side plate (56a). The case side plate (56a) is fixed to the partition portion (45) via a stay (58) at a position spaced a predetermined distance from the partition portion (45).

[0056] The bearing member (60) rotatably supports the rotary shaft member (80) therein. The bearing member (60) is formed in a cylindrical shape with both axial ends open. The bearing member (60) extends from the case side plate (56a) to the other end in the first direction. The bearing member (60) extends from the accommodation 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) in the heat insulating material (46) and the first hole (H1) in the partition portion (45). The tip of the bearing member (60) reaches the open end of the first hole (H1) on the damper (51) side. The outer diameter of the bearing member (60) is smaller than the inner diameters of the first hole (H1) and the second hole (H2). The axis of the bearing member (60) roughly coincides with the axis of each of the first hole (H1) and the second hole (H2).

[0057] A first opening (61) is formed at one end in the first direction of the bearing member (60). A second opening (62) is formed at the other end in the first direction of the bearing member (60). 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 integrally formed. However, the bearing member (60) and the motor case (55) may be separate members. The detailed structure of the bearing member (60) will be described later.

[0059] (4-2-2) Second case part As shown in FIG. 5, the second case portion (57) has a motor housing portion (57a) and a gear housing portion (57b). The motor housing portion (57a) and the gear housing portion (57b) are formed toward the rear of the second case portion (57). The motor housing portion (57a) and the gear housing portion (57b) are formed in a cylindrical shape that bulges rightward from the base of the second case portion (57). The motor housing portion (57a) is located forward of the gear housing portion (57b). The motor housing portion (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] 7 and 9, the second case portion (57) is formed with an inner bearing portion (57c) extending toward the other end in the first direction. The inner bearing portion (57c) is formed in a cylindrical shape with its axis aligned in the first direction.

[0061] (4-3) Drive mechanism 6 and 7, the drive mechanism (70) includes a motor (71) and a drive gear (72). The motor (71) is disposed inside the motor housing (57a), and the drive gear (72) is disposed inside the gear housing (57b). The housing chamber (S2) of the motor case (55) is a space that includes the interior of the motor housing (57a) and the interior of the gear housing (57b).

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

[0063] The drive gear (72) is disposed on the rear side of the output shaft (71b). The drive gear (72) has a cylindrical body portion (72a) extending in a first direction, a first gear portion (72b) provided at one end of the body portion (72a) in the first direction, and a second gear portion (72c) provided at the other end of the body portion (72a) in the first direction. The first gear portion (72b) is adjacent to the pinion (71c) in the front-rear direction. The first gear portion (72b) has a plurality of teeth formed on its outer periphery that mesh with the teeth of the pinion (71c). The second gear portion (72c) has a plurality of teeth formed on its outer periphery.

[0064] (4-4) Rotating shaft member As shown in FIGS. 7 to 9, the damper unit (50) includes a rotating shaft member (80). The rotating shaft member (80) passes through the first hole (H1) of the partition (45) and connects the drive mechanism (70) and the damper (51). The rotating shaft member (80) is rotatably supported inside the bearing member (60). The rotating shaft member (80) is driven to rotate by the drive mechanism (70).

[0065] The rotating shaft member (80) has a rotating shaft body (81) extending in a first direction, a flange portion (90) provided near one end of the rotating shaft body (81) in the first direction, and an engaging portion (82) provided at the other end of the rotating shaft body (81) in the first direction.

[0066] The rotating shaft body (81) is formed in a cylindrical shape with a bottom and has a shaft opening (81a) at one end in the first direction. The inner bearing portion (57c) described above fits into the shaft opening (81a) with a small gap between them. In other words, a gap is formed between the outer peripheral surface of the inner bearing portion (57c) and the inner peripheral surface of the rotating shaft body (81).

[0067] As shown in Fig. 8, the engaging portion (82) extends in a first direction from the rotary shaft main body (81) toward the damper (51). The engaging portion (82) has a plurality of first protrusions (82a) protruding radially outward and one second protrusion (82b) protruding radially outward and having a radial length greater than that of the first protrusions (82a). The second protrusion (82b) forms a key that fits into a key groove (not shown) of the damper (51). The second protrusion fits into the key groove, thereby connecting the rotary shaft member (80) and the damper (51).

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

[0069] In this embodiment, the rotational force of the output shaft (71b) of the motor (71) is transmitted in this order through the pinion (71c), the first gear portion (72b), the second gear portion (72c), and the driven gear (83), thereby rotating the rotary shaft member (80). The pinion (71c), the first gear portion (72b), the second gear portion (72c), and the driven gear (83) constitute a gear mechanism (G) that transmits the rotational force of the output shaft (71b) of the motor (71) to the rotary shaft member (80). The gear mechanism (G) may be configured without the drive gear (72). In this configuration, the pinion (71c) of the output shaft (71b) meshes with the driven gear (83) of the rotary shaft member (80).

[0070] 7 to 9, the flange portion (90) has a disk-shaped base portion (91), a first annular protrusion portion (92), and a second annular protrusion portion (93). The respective axes of the base portion (91), the first annular protrusion portion (92), and the second annular protrusion portion (93) generally coincide with the axis of the rotating shaft body (81).

[0071] The base (91) is continuous with the outer peripheral surface of the rotating shaft body (81). The first annular protrusion (92) protrudes toward the other end in the first direction from the outer peripheral edge of the surface of the base (91) on the other end side in the first direction. The second annular protrusion (93) is continuous with the outer peripheral surface of the first annular protrusion (92) and protrudes further toward the other end side in the first direction.

[0072] (4-5) First bearing portion and second bearing portion 7 and 9, the bearing member (60) has a first bearing portion (63) and a second bearing portion (64). The first bearing portion (63) is located closer to the damper (51), and the second bearing portion (64) is located closer to the drive mechanism (70). The first bearing portion (63) and the second bearing portion (64) are located away from each other in the first direction.

[0073] The first bearing portion (63) is provided at the other end in the first direction inside the bearing member (60). The first bearing portion (63) is formed in an annular shape that protrudes radially inward from the main body of the bearing member (60) toward the rotating shaft member (80). The first bearing portion (63) comes into contact with the outer circumferential surface of the rotating shaft member (80) and supports the rotating shaft member (80) so that it can rotate. The first bearing portion (63) constitutes a radial sliding bearing that comes into sliding contact with the rotating shaft member (80).

[0074] The second bearing portion (64) is provided at one end 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) toward one end in the first direction. The second bearing portion (64) contacts the inner circumferential surface of the second annular protrusion (93) of the rotating shaft member (80) and rotatably supports the rotating shaft member (80). The second bearing portion (64) constitutes a radial sliding bearing that is in sliding contact with the rotating shaft member (80). In this manner, in this embodiment, the rotating shaft member (80) is supported at two locations, thereby preventing misalignment of the rotating shaft member (80). The bearing member (60) may have three or more bearing portions.

[0075] A cylindrical intermediate gap (65) is formed between the inner peripheral surface of the bearing member (60) and the rotating shaft body (81). Therefore, the bearing member (60) and the rotating shaft body (81) do not come into contact with each other at a position corresponding to the intermediate gap (65). As a result, the sliding resistance between the bearing member (60) and the rotating shaft member (80) can be reduced, and the load on the motor (71) can be reduced.

[0076] (5) Control unit The air conditioner (10) has a control unit (C). The control unit (C) has an outdoor control unit (C1) and an indoor control unit (C2). The outdoor control unit (C1) and the indoor control unit (C2) are configured to be able to communicate with each other wirelessly or via a wire. The outdoor control unit (C1) and the indoor control unit (C2) include an MCU (Micro Controller Unit), an electric circuit, and an electronic circuit. The MCU includes a CPU (Central Processing Unit), a memory, and a communication interface. The memory stores various programs to be executed by the CPU.

[0077] The outdoor control section (C1) is provided in the outdoor unit (20). The outdoor control section (C1) controls the rotation speed of the compressor (21), the rotation speed of the outdoor fan (25), the opening of the expansion valve (23), and the like.

[0078] The indoor control section (C2) is provided in the indoor unit (30). The indoor control section (C2) controls the rotation speed of the indoor fan (34) and the forward and reverse rotation directions of the motor (71).

[0079] (6) Driving behavior The air conditioner (10) performs cooling operation and heating operation.

[0080] (6-1) Cooling operation In the cooling operation, the control unit (C) operates the compressor (21), the outdoor fan (25), and the indoor fan (34), sets the four-way selector valve (24) to the first state, and adjusts the opening of the expansion valve (23). The control unit (C) controls the motor (71) to close the damper (51) as indicated by the two-dot chain line in Fig. 4. In the cooling operation, the refrigerant circuit (11) performs a refrigeration cycle (cooling cycle) in which the outdoor heat exchanger (22) functions as a radiator (strictly speaking, a condenser) and the indoor heat exchanger (32) functions as an evaporator.

[0081] In the indoor unit (30), air from the indoor space (I) flows into the air flow path (P) through the air inlet (39). After being cooled in the indoor heat exchanger (32), the air flows through the upper flow path (42) and is blown out through the second outlet (40) toward the ceiling of the indoor space (I). In cooling operation, the lower flow path (41) is closed by the damper (51), so that cooled air is not blown out through the first outlet (37) toward the floor of the indoor space (I). This prevents occupants in the indoor space (I) from feeling a cold draft. Note that the damper (51) does not need to be always closed in cooling operation. In cooling operation, the control unit (C) may switch the damper (51) between an open state and a closed state in response to a user operation.

[0082] (6-2) Heating operation In the heating operation, the control unit (C) operates the compressor (21), the outdoor fan (25), and the indoor fan (34), sets the four-way selector valve (24) to the second state, and adjusts the opening of the expansion valve (23). The control unit (C) controls the motor (71) to set the damper (51) to the open state shown by the solid line in Fig. 4. In the heating operation, the refrigerant circuit (11) performs a refrigeration cycle (heating cycle) in which the indoor heat exchanger (32) functions as a radiator (strictly speaking, a condenser) and the outdoor heat exchanger (22) functions as an evaporator.

[0083] In the indoor unit (30), air from the indoor space (I) flows into the air flow path (P) through the air inlet (39). After being heated in the indoor heat exchanger (32), the air 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 through the second air outlet (40) toward the ceiling of the indoor space (I). The air in the lower flow path (41) is blown out through the first air outlet (37) toward the floor of the indoor space (I).

[0084] (7) Air leakage prevention measures (7-1) Issues regarding air leakage prevention In the cooling operation described above, the lower flow path (41) may be blocked by the damper (51). In this case, the pressure in the lower flow path (41) on the upstream side of the damper (51) increases during the cooling operation, and 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 (strictly speaking, a turbo fan) with a relatively high fan static pressure. Therefore, the indoor unit (30) of this embodiment is more likely to experience such air leakage.

[0085] If the cooled air leaks into the first space (S1), the temperature of the first space (S1) and the air surrounding the first space (S1) will decrease, making condensation more likely to occur. Furthermore, the first space (S1) is formed inside the front plate (31a) and the first side plate (31c) of the casing (31). Therefore, condensation may occur near the outer surface of the casing (31) due to air leaking into the first space (S1).

[0086] On the other hand, one possible measure to prevent air from leaking from the lower flow path to the first space is to provide a seal around the rotating shaft member so that it covers the first hole in the partition from the first space side. However, with this configuration, when an attempt is made to tightly close the gap of the first hole, the rotating shaft member and the seal member come into contact. As a result, the seal member may become entangled in the rotating shaft member, or the torque of the rotating shaft member may increase, making it impossible to stably switch the state of the damper (opening / closing member).

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

[0088] (7-2) Sealing material As shown in FIGS. 8 and 9, the damper unit (50) has a seal member (95). The seal member (95) is provided on the outer peripheral surface of the bearing member (60). The seal member (95) is made of a flexible and elastic sheet-like member. The seal member (95) also has heat insulating properties. The seal member (95) is made of an open-cell resin material, such as polyethylene foam. The seal member (95) may also be made of a closed-cell resin material or synthetic rubber.

[0089] The seal member (95) has, in order from the other end to the one end in the first direction, a first seal portion (95a), a second seal portion (95b), and a covering portion (95c).

[0090] The first seal (95a) is located inside the first hole (H1). Strictly speaking, the first seal (95a) is located inside the tubular portion (45b) of the partition (45). The first seal (95a) is compressed in the thickness direction by the tubular portion (45b) and the bearing member (60). The second seal (95b) is located inside the second hole (H2) of the heat insulating material (46). In other words, the second seal (95b) is disposed between the inner circumferential surface of the second hole (H2) and the outer circumferential surface of the bearing member (60). The first seal (95a) and the second seal (95b) prevent air from leaking from the lower flow path (41) into the first space (S1).

[0091] The seal member (95) is located on the outer circumferential surface of the bearing member (60). In other words, the bearing member (60) is interposed between the seal member (95) and the rotating shaft member (80). Therefore, the seal member (95) and the rotating shaft member (80) do not come into contact with each other. As a result, it is possible to prevent the seal member (95) from becoming entangled in the rotating shaft member (80) and to prevent an increase in the torque of the rotating shaft member (80), and it is possible to stably switch the damper (51) between the open state and the closed state.

[0092] The covering portion (95c) covers the outer peripheral surface of the intermediate portion (66) of the bearing member (60). The intermediate portion (66) is a portion of the bearing member (60) located outside the motor case (55), the first hole (H1), and the second hole (H2). Strictly speaking, the intermediate portion (66) is located between the motor case (55) and the partition portion (45) and outside the motor case (55), the first hole (H1), and the second hole (H2). In this embodiment, air in the lower flow path (41) may leak into the gap between the bearing member (60) and the rotating shaft member (80). When air in the lower flow path (41) flows inside the intermediate portion (66) of the bearing member (60), condensation may occur on the outer surface of the intermediate portion (66). In contrast, the covering portion (95c) covers the outer peripheral surface of the bearing member (60), thereby making it possible to prevent condensation from occurring on the outer surface of the intermediate portion (66).

[0093] (7-3) Bearing materials The bearing member (60) extends in the first direction from the storage chamber (S2) to the first hole (H1). In other words, the bearing member (60) substantially connects the lower flow path (41) and the storage chamber (S2). Therefore, even if air leaks into the gap between the bearing member (60) and the rotating shaft member (80), the air is prevented from leaking into the first space (S1). As a result, as described above, condensation can be prevented from forming in the first space (S1) or on the outer surface of the casing (31).

[0094] (7-4) Labyrinth seal structure 9, the flange (90) closes the second opening (62) of the bearing member (60). Therefore, the flange (90) can prevent air that has leaked into the gap between the bearing member (60) and the rotating shaft member (80) from flowing into the storage chamber (S2).

[0095] Furthermore, the damper unit (50) of this embodiment has a labyrinth seal structure (L) for preventing air leakage from inside the bearing member (60) to the accommodation chamber (S2). The labyrinth seal structure (L) is formed in the vicinity of the bearing member (60) and the rotating shaft member (80). Specifically, the labyrinth seal structure (L) includes the first annular convex portion (92), the second annular convex portion (93), and the second bearing portion (64). The labyrinth seal structure also has a ring-shaped case-side annular convex portion (94). The case-side annular convex portion (94) is located on the outer periphery of the second annular convex portion (93). The case-side annular convex portion (94) protrudes from the case side plate (56a) toward one end in the first direction.

[0096] The surface of the first annular protrusion (92) at the other end in the first direction and the surface of the second bearing portion (64) at one end in the first direction are in substantial contact with each other via a small gap. These surfaces constitute an annular first thrust seal surface (96). The radially inner surface of the second annular protrusion (93) and the radially outer surface of the second bearing portion (64) are in sliding contact with each other as described above. These surfaces constitute an annular first radial seal surface (97). The surface of the second annular protrusion (93) at the other end in the first direction and the inner surface of the case side plate (56a) are in substantial contact with each other via a small gap. These surfaces constitute an annular second thrust seal surface (98). The outer peripheral surface of the second annular protrusion (93) and the inner peripheral surface of the case side annular protrusion (94) are in substantial contact with each other via a small gap. These surfaces constitute an annular second radial seal surface (99).

[0097] 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 formed continuously. This increases the seal length in the vicinity of the bearing member (60) and the rotating shaft member (80). Furthermore, the orientation of each seal surface (96, 97, 98, 99) changes stepwise between the thrust direction and the radial direction. This further reduces air leakage from the inside of the bearing member (60) to the accommodation chamber (S2). The number of continuous seal surfaces in the labyrinth seal structure (L) may be increased or decreased.

[0098] (7-5) Gear mechanism As described above, this embodiment includes a gear mechanism (G) that transmits the power from the output shaft (71b) of the motor (71) to the rotary shaft member (80). Therefore, as shown in FIG. 6, the axis (P1) of the output shaft (71b) of the motor (71) and the axis (P2) of the rotary shaft member (80) can be radially offset from each other. Therefore, even if air leaks from inside the bearing member (60) into the storage chamber (S2), the air can be prevented from directly hitting the motor (71). As a result, condensation around the motor (71) can be suppressed.

[0099] 7, the axis (P1) of the output shaft (71b) of the motor (71) is located higher than the axis (P2) of the rotating shaft member (80). Therefore, even if condensation occurs in the storage chamber (S2), the condensation can be prevented from adhering to the motor (71).

[0100] (8) Effects of the embodiment (8-1) The damper unit (50) includes a rotating shaft member (80), a cylindrical bearing member (60), and a seal member (95). The rotating shaft member (80) passes through the first hole (H1) of the partition portion (45), connects the drive mechanism (70) and the damper (51), and is driven to rotate by the drive mechanism (70). The bearing member (60) is located within the first hole (H1) and supports the rotating shaft member (80) rotatably therein. The seal member (95) is disposed between the inner circumferential surface of the first hole (H1) and the outer circumferential surface of the bearing member (60).

[0101] In this configuration, the sealing member (95) can prevent air from leaking from the lower flow path (41) to the first space (S1). The sealing member (95) is located on the outer circumferential surface of the bearing member (60) and does not come into contact with the rotating shaft member (80). This allows the damper (51) to be stably switched between the open state and the closed state.

[0102] (8-2) The damper unit (50) is disposed in the first space (S1) and has a motor case (55) that forms a housing chamber (S2) that houses 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] In this configuration, air that has leaked into the bearing member (60) flows into the accommodation chamber (S2), thereby preventing the air from leaking into the first space (S1). As a result, condensation on the first space (S1) and the outer surface of the casing (31) can be prevented, thereby improving the reliability of the air conditioner (10).

[0104] (8-3) The drive mechanism (70) includes a motor (71) having an output shaft (71b) and a gear mechanism (G) that transmits the rotational force of the output shaft (71b) of the motor (71) to the rotary shaft member (80). This configuration can prevent air leaking from the storage chamber (S2) from directly hitting the motor (71), thereby ensuring the reliability of the motor (71).

[0105] In particular, since the axis of the output shaft (71b) of the motor (71) is located above the axis of the rotary shaft member (80), condensation water generated in the storage chamber (S2) can be prevented from adhering to the motor (71).

[0106] (8-4) The flange (90) closes the first opening (61) of the bearing member (60) on the side of the drive mechanism (70), thereby preventing air from leaking into the storage chamber (S2) from inside the bearing member (60).

[0107] In particular, the damper unit (50) has a labyrinth seal structure (L) that seals the gap between the bearing member (60) and the flange portion (90). This makes it possible to extend the seal length of the seal surface between the bearing member (60) and the rotating shaft member (80), thereby further suppressing air from leaking into the storage chamber (S2).

[0108] (8-5) The bearing member (60) has a first bearing portion (63) located closer to the damper (51) and with which the rotating shaft member (80) makes sliding contact, and a second bearing portion (64) located closer to the drive mechanism (70) and with which the rotating shaft member (80) makes sliding contact. With this configuration, both axial ends of the rotating shaft member (80) can be supported, thereby preventing the axis of the rotating shaft member (80) from tilting or shifting.

[0109] An intermediate gap (65) is formed between the first bearing portion (63) and the second bearing portion (64), thereby reducing the sliding resistance of the rotating shaft member (80). As a result, the load on the motor (71) can be reduced and the damper (51) can be opened and closed quickly.

[0110] (8-6) The partition (45) has a tubular portion (45b) extending from the partition body (45a) in the axial direction of the rotary shaft member (80) and having a first hole (H1). This allows the axial sealing length of the first hole (H1) to be extended, thereby further reducing air leakage from the lower flow path (41) to the first space (S1).

[0111] (8-7) The seal member (95) covers the periphery of the middle portion (66) of the rotary shaft member (80) that 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 middle portion (66) that faces the first space (S1). This configuration can prevent condensation from forming on the outer surface of the middle portion (66) when cool air flows through the middle portion (66). The seal member (95) serves both as a member for sealing the first hole (H1) and as a heat insulator for the middle portion (66), thereby reducing the number of parts.

[0112] The seal member (95) is a flexible sheet-like member, and therefore, the seal member (95) can be easily attached to the outer circumferential surface of the bearing member (60) while being deformed.

[0113] (9) Other embodiments The above embodiment may be configured as follows.

[0114] The indoor unit (30) of the air conditioner (10) may be a wall-mounted or ceiling-mounted type. The air conditioner (10) may be a humidity control device that adjusts the humidity of the target space (I), an air purifier that purifies the air in the target space (I), or a ventilation device that ventilates the target space (I).

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

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

[0117] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Furthermore, the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate as long as the functionality of the subject matter of the present disclosure is not impaired.

[0118] The terms "first," "second," "third," etc. mentioned above are used to distinguish the terms to which these terms are attached, and do not limit the number or order of the terms. [Industrial Applicability]

[0119] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for air conditioning apparatuses. [Explanation of symbols]

[0120] 10 Air conditioning equipment 31 Casing 32 Indoor heat exchanger (heat exchanger) 37 1st outlet 40 2nd outlet 41 Lower channel (first channel) 45 Partition 45a Partition body 45b Cylinder part 51 Damper (opening and closing member) 55 Motor case (housing member) 60 Bearing material 61 First Opening (Opening) 63 1st bearing part 64 2nd bearing part 66 Middle section 70 Drive mechanism 71 Motor 71b Output shaft 80 Rotating shaft member 81 Rotating shaft body 83 Driven gear 90 Tsuba 95 Sealing material G gear mechanism H1 1st hole (hole) I. Indoor space (target space) L Labyrinth seal structure P Air flow path S1 1st space S2 Containment Cell

Claims

1. a casing (31) having an air flow path (P); a partition (45) that separates a first flow path (41) included in the air flow path (P) from a first space (S1) and that has a hole (H1); a drive mechanism (70) disposed in the first space (S1); an opening / closing member (51) that opens and closes the first flow path (41); a rotary shaft member (80) that passes through the hole (H1) of the partition (45), connects the drive mechanism (70) to the open / close member (51), and is driven to rotate by the drive mechanism (70); a cylindrical bearing member (60) located in the hole (H1) and rotatably supporting the rotary shaft member (80) therein; a seal member (95) disposed between an inner peripheral surface forming the hole (H1) and an outer peripheral surface of the bearing member (60); Air conditioning equipment.

2. the cooling fan further includes a housing member (55) that is disposed in the first space (S1) and forms a housing chamber (S2) that houses the drive mechanism (70); The bearing member (60) extends from the accommodation chamber (S2) to the hole (H1). The air conditioning apparatus according to claim 1.

3. The drive mechanism (70) a motor (71) having an output shaft (71b); a gear mechanism (G) for transmitting the rotational force of the output shaft (71b) of the motor (71) to the rotary shaft member (80). The air conditioning apparatus according to claim 2.

4. The axis of the output shaft (71b) of the motor (71) is located above the axis of the rotary shaft member (80). The air conditioning apparatus according to claim 3.

5. The gear mechanism (G) includes a driven gear (83) provided on the rotating shaft member (80). The air conditioning apparatus according to claim 3 or 4.

6. The rotary shaft member (80) A rotating shaft body (81), a flange portion (90) extending radially outward from the rotary shaft body (81) so as to close an opening (61) of the bearing member (60) on the side of the drive mechanism (70); The air conditioning apparatus according to any one of claims 2 to 4.

7. The bearing member (60) further includes a labyrinth seal structure (L) for sealing a gap between the bearing member (60) and the flange portion (90). The air conditioning apparatus according to claim 6.

8. The bearing member (60) a first bearing portion (63) located closer to the opening / closing member (51) and with which the rotary shaft member (80) is in sliding contact; a second bearing portion (64) located near the drive mechanism (70) and with which the rotary shaft member (80) is in sliding contact; The air conditioning apparatus according to any one of claims 1 to 4.

9. the bearing member (60) has an intermediate portion (66) located outside the hole (H1) of the partition portion (45) and outside the storage member (55); The sealing member (95) covers the periphery of the intermediate portion (66). The air conditioning apparatus according to any one of claims 2 to 4.

10. The partition (45) a partition body (45a); a cylindrical portion (45b) extending from the partition body (45a) in the axial direction of the rotary shaft member (80) and having the hole (H1); The seal member (95) is disposed between the inner peripheral surface of the cylindrical portion (45b) and the outer peripheral surface of the bearing member (60). The air conditioning apparatus according to any one of claims 1 to 4.

11. The sealing member (95) is made of a flexible sheet-like member. The air conditioning apparatus according to any one of claims 1 to 4.

12. a heat exchanger (32) disposed in the air flow path (P) and functioning as a radiator and an evaporator; The casing (31) a first air outlet (37) for blowing air from the air flow path (P) into the target space (I); a second air outlet (40) located above the first air outlet (37) and configured to blow air from the air flow path (P) into the target space (I); The first flow path (41) is the first air outlet (37) or a flow path continuous with the first air outlet (37). The air conditioning apparatus according to any one of claims 1 to 4.

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