Outdoor unit

Abstract

Provided is an outdoor unit (100), wherein: a support mechanism (50) for supporting a fan motor (20) in a support region (SA) located between a front wall part (41) and a rear wall part (42) has a first shaft member (51) having one end (51a) attached to the front wall part (41) and formed so as to extend toward the support region (SA); a heat exchanger (30) has a first linear part (31) disposed along the front wall part (41), a second linear part (32) disposed orthogonally to the first linear part (31), and a connection part (34) having a curved shape along the rotation direction (RD) of a fan (10) in a plan view and connecting one end of the first linear part (31) and one end of the second linear part (32); and the first shaft member (51) is disposed so as to pass through the connection part (34) in a plan view.

Description

Outdoor Unit

[0001] The present disclosure relates to an outdoor unit for an air conditioner.

[0002] Conventionally, there has been known an outdoor unit in which a heat exchanger is disposed inside a casing, and a blower disposed above the heat exchanger is operated to draw outside air into the casing and cause heat exchange to be performed in the heat exchanger (see, for example, Patent Document 1). Patent Document 1 discloses that a fan motor that drives the blower is supported at a position above the heat exchanger by a plurality of brackets attached to a frame of the casing.

[0003] Japanese Unexamined Patent Application Publication No. 2017-26187

[0004] The heat exchanger disclosed in Patent Document 1 is formed by integrally forming a flat plate-shaped long side portion and a flat plate-shaped short side portion in an L-shape, and is disposed so as to surround the blower when the outdoor unit is viewed in plan from above (see FIG. 4). Further, among the brackets that support the fan motor, a mounting bar of a bracket attached to the long side portion of the casing where the long side portion of the heat exchanger is disposed is located at the connection position where the long side portion and the short side portion of the heat exchanger are connected when the outdoor unit is viewed in plan from above. It is disposed downstream of the connection position in the rotation direction of the blower.

[0005] Here, the connection position where the long side portion and the short side portion of the heat exchanger are connected is a position where air is less likely to flow in compared to the long side portion and the short side portion, and is a region where the flow velocity of air guided from the heat exchanger to the blower becomes slow. Further, when the rotational air flow generated by the blower collides with the mounting bar of the bracket, a region downstream of the mounting bar in the rotation direction becomes a region where the air flow velocity is slow.

[0006] If the region where the air flow velocity is slow downstream of the mounting bar in the rotation direction and the region where the air flow velocity is slow at the connection position where the long side portion and the short side portion of the heat exchanger are connected overlap for the most part, the air flow velocity in this overlapping region becomes slower than that in the surrounding area. When the fan passes through this region, large pressure fluctuations occur on the surface of the fan, resulting in an increase in noise level.

[0007] This disclosure has been made in view of the above circumstances, and aims to provide an outdoor unit that can suppress the occurrence of large pressure fluctuations on the fan surface and an increase in noise level when the fan passes through a region in which the airflow velocity is slower than the surrounding area due to the structure of the heat exchanger and the airflow velocity is slower due to collision with the support mechanism of the fan motor largely overlap.

[0008] To solve the above problems, the outdoor unit of this disclosure employs the following means. An outdoor unit according to one aspect of this disclosure comprises a fan motor that rotates a drive shaft extending in the height direction, a fan attached to the drive shaft and rotating about a rotation axis extending in the height direction, a heat exchanger disposed below the fan, a housing that houses the fan motor, the fan and the heat exchanger and has an air outlet located above the fan and an intake port for taking in air from the outside toward the air outlet from the heat exchanger, and a support mechanism attached to the housing and supporting the fan motor in a support area, wherein the housing comprises a first wall portion extending along the height direction and a second wall portion extending along the height direction and disposed parallel to the first wall portion. The support mechanism has an axial member, one end of which is attached to the first wall and which is formed to extend toward the support area sandwiched between the first wall and the second wall; the heat exchanger has a first straight section arranged along the first wall so as to extend in the height direction; a second straight section arranged so as to extend in the height direction and so as to be perpendicular to the first straight section when viewed from above; and a connecting section arranged so as to extend in the height direction and so as to be curved in line with the rotation direction of the fan when viewed from above, connecting one end of the first straight section and one end of the second straight section; the axial member is arranged to pass through the connecting section when viewed from above.

[0009] According to this disclosure, it is possible to provide an outdoor unit in which a large portion of the region where the airflow velocity passing through the heat exchanger is slower than the surrounding area due to the structure of the heat exchanger and the region where the airflow velocity is slower due to collision with the fan motor support mechanism overlap, thereby suppressing the occurrence of large pressure fluctuations on the fan surface and the resulting increase in noise level when the fan passes through this region.

[0010] This is a perspective view of an outdoor unit according to one embodiment of the present disclosure. This is a cross-sectional view of the outdoor unit shown by the line A-A in Figure 1. This is a perspective view of the vicinity of the fan shown in Figure 2. This is a plan view of the fan motor support mechanism and heat exchanger shown in Figure 3, viewed from above. This is a partially enlarged view of the support mechanism and heat exchanger shown in Figure 4. This is a side view of the first axial member of the support mechanism shown in Figure 5, viewed from the direction of the second horizontal axis. This is a side view of the second axial member of the support mechanism shown in Figure 5, viewed from the direction of the second horizontal axis.

[0011] Hereinafter, an outdoor unit 100 according to one embodiment of the present disclosure will be described with reference to the drawings. Figure 1 is a perspective view of the outdoor unit 100 according to one embodiment of the present disclosure. Figure 2 is a cross-sectional view of the outdoor unit 100 shown in Figure 1, taken along the line A-A. Figure 3 is a perspective view of the vicinity of the fan 10 shown in Figure 2. In Figure 3, a part of the housing 40 surrounding the fan 10 is omitted.

[0012] The outdoor unit 100 of this embodiment is suitable, for example, as an outdoor unit for a multi-split air conditioner in a building. As shown in Figures 1 to 3, the outdoor unit 100 of this embodiment comprises a pair of fans 10, a pair of fan motors 20, a pair of heat exchangers 30, a housing 40, and a pair of support mechanisms 50.

[0013] Fan 10 is a device that rotates around a rotation axis RX extending in the height direction HD, blowing air from below in the height direction HD upwards. Fan motor 20 is an electric motor that rotates a drive shaft 21 extending in the height direction HD. Fan 10 is attached to the drive shaft 21.

[0014] The heat exchanger 30 is positioned below the fan 10 in the height direction HD and is a device that performs heat exchange between the outside air and a heat exchange medium circulating inside. The heat exchanger 30 circulates the heat exchange medium between itself and an indoor unit (not shown) which is connected via piping (not shown) through which the heat exchange medium circulates.

[0015] The housing 40 is a structure that houses the fan 10, the fan motor 20, the heat exchanger 30, and other auxiliary components. The housing 40 has a roughly rectangular parallelepiped shape and includes a front wall portion (first wall portion) 41, a rear wall portion (second wall portion) 42, a side wall portion 43, a side wall portion 44, a horizontally positioned top portion 45, and a bottom portion (not shown).

[0016] The rear wall portion 42 is arranged parallel to the front wall portion 41. The side wall portion 44 is arranged parallel to the side wall portion 43. Multiple intake ports 41a are formed in the front wall portion 41 for taking in air from the outside toward the heat exchanger 30. Multiple intake ports 43a are formed in the side wall portion 43 for taking in air from the outside toward the heat exchanger 30. Multiple intake ports (not shown) are formed in the side wall portion 44 for taking in air from the outside toward the heat exchanger 30. A pair of outlets 45a are formed in the top surface portion 45, which are located above the fan 10 and blow out the air that has exchanged heat with the heat exchange medium in the heat exchanger 30 to the outside.

[0017] The support mechanism 50 will be described in detail with reference to the drawings. Figure 4 is a plan view of the support mechanism 50 and heat exchanger 30 of the fan motor 20 shown in Figure 3, viewed from above. Figure 5 is a partially enlarged view of the support mechanism 50 and heat exchanger 30 shown in Figure 4. Figure 6 is a side view of the first axial member 51 of the support mechanism 50 shown in Figure 5, viewed from the direction of the second horizontal axis HX2. Figure 7 is a side view of the second axial member 52 of the support mechanism 50 shown in Figure 5, viewed from the direction of the second horizontal axis HX2.

[0018] The support mechanism 50 is attached to the housing 40 and supports the fan motor 20 in the support area SA (see Figure 5). As shown in Figure 6, the support mechanism 50 is attached to the housing 40 at a mounting position at a first predetermined height H1 in the height direction HD and supports the fan motor 20 at a support position at a second predetermined height H2 which is above the first predetermined height H1. The first predetermined height H1 and the second predetermined height H2 are heights along the height direction HD from the ground surface S on which the outdoor unit 100 is installed.

[0019] As shown in Figures 4 and 5, the support mechanism 50 includes a pair of first axial members 51, a pair of second axial members 52, a first connecting member 53, a second connecting member 54, a pair of first support members 55, and a pair of second support members 56.

[0020] The first axial member 51 is an axial member formed so as to extend toward the support position of the support region SA sandwiched between the front wall portion 41 and the rear wall portion 42, with one end 51a attached to the mounting position of the front wall portion 41 and the rear wall portion 42. As shown in Figures 5 and 6, the first axial member 51 has a first deflection region 51A, a first inclined region 51B, and a first connecting region 51C.

[0021] As shown in Figure 2, the height of the first axial member 51 is L1, and the height of the fan 10 HD is L2. It is preferable to set the length L1 to 0.3 times or less of the length L2. By setting the length L1 of the first axial member 51 to 0.3 times or less of the length L2, the ventilation resistance of the first axial member 51 can be reduced, and the decrease in flow velocity when the airflow generated by the rotation of the fan 10 collides with the first axial member 51 can be suppressed. It is preferable to set the length L1 to 0.2 times or less of the length L2, and even more preferable to set it to 0.1 times or less of the length L2.

[0022] As shown in Figure 2, the upper end of the heat exchanger 30 in the height direction HD is positioned lower than the lower end of the support mechanism 50 in the height direction HD. This prevents the heat exchanger 30 and the support mechanism 50 from being positioned in overlapping locations in the height direction HD.

[0023] As shown in Figure 5, the first deflection region 51A is a region that extends in a direction deflected by a first deflection angle θ11 with respect to a first horizontal axis HX1 that is perpendicular to the front wall portion 41 and the rear wall portion 42 and passes through the drive shaft 21 when the support mechanism 50 is viewed from above. The first deflection angle θ11 is set in the range of 30 degrees or more and 60 degrees or less. Preferably, the first deflection angle θ11 is set to 40 degrees or more and 50 degrees or less.

[0024] As shown in Figure 6, the first inclined region 51B is a region that extends in a direction inclined at a first inclination angle θ12 with respect to the rotation axis RX parallel to the drive shaft 21, from the mounting position in the height direction HD of the first predetermined height H1 to the support position in the height direction HD of the second predetermined height H2. The first inclined region 51B extends in a direction inclined at a first inclination angle θ12 with respect to the drive shaft 21 when viewed from the side along the second horizontal axis HX2 which is perpendicular to the first horizontal axis HX1. The first inclination angle θ12 is set in the range of 30 degrees or more and 60 degrees or less. Preferably, the first inclination angle θ12 is set to 40 degrees or more and 50 degrees or less.

[0025] As shown in Figures 5 and 6, the first connecting region 51C extends along the first horizontal axis HX1 and connects the front wall portion 41 and the rear wall portion 42 with the first deflection region 51A. The pair of first axial members 51 are connected by a first connecting member 53 that extends parallel to the first horizontal axis HX1 in the support region SA. The pair of first axial members 51 and the first connecting member 53 are integrally formed from, for example, a single hollow tubular body made of metal.

[0026] The second axial member 52 is an axial member formed so as to extend toward the support position of the support region SA sandwiched between the front wall portion 41 and the rear wall portion 42, with one end 52a attached to the mounting position of the front wall portion 41 and the rear wall portion 42. As shown in Figures 5 and 7, the second axial member 52 has a second deflection region 52A, a second inclined region 52B, and a second connecting region 52C.

[0027] As shown in Figure 5, the second deflection region 52A is a region that extends in a direction deflected by a second deflection angle θ21 with respect to the first horizontal axis HX1, which is perpendicular to the front wall portion 41 and the rear wall portion 42 when the support mechanism 50 is viewed from above and passes through the drive shaft 21. The second deflection angle θ21 is set in the range of 30 degrees or more and 60 degrees or less. Preferably, the second deflection angle θ21 is set to 40 degrees or more and 50 degrees or less.

[0028] As shown in Figure 7, the second inclined region 52B is a region that extends in a direction inclined at a second inclination angle θ22 with respect to the rotation axis RX parallel to the drive shaft 21, from the mounting position in the height direction HD of the first predetermined height H1 to the support position in the height direction HD of the second predetermined height H2. The second inclined region 52B extends in a direction inclined at a second inclination angle θ22 with respect to the drive shaft 21 when viewed from the side along the second horizontal axis HX2. The second inclination angle θ22 is set in the range of 30 degrees or more and 60 degrees or less. Preferably, the second inclination angle θ22 is set at 40 degrees or more and 50 degrees or less.

[0029] As shown in Figures 5 and 7, the second connecting region 52C extends along the first horizontal axis HX1 and connects the front wall portion 41 and the rear wall portion 42 with the second deflection region 52A. The pair of second axial members 52 are connected in the support region SA by a second connecting member 54 that extends parallel to the first horizontal axis HX1. The pair of second axial members 52 and the second connecting member 54 are integrally formed from, for example, a single hollow tubular body made of metal.

[0030] The pair of first support members 55 are members attached to the first connecting member 53 and the second connecting member 54, respectively, and are members for transmitting the weight of the fan motor 20 to the first connecting member 53 and the second connecting member 54 via the pair of second support members 56. The first support members 55 are formed to extend parallel to the first horizontal axis HX1 and have a rectangular prism shape with a roughly U-shaped cross-section, where only the downward-facing surface is cut out.

[0031] The pair of second support members 56 are each attached to the first support member 55 and are members for transmitting the weight of the fan motor 20 to the first connecting member 53 and the second connecting member 54 via the pair of first support members 55. The second support members 56 are plate-shaped members formed to extend parallel to the second horizontal axis HX2 and having a surface perpendicular to the rotation axis RX. As shown in Figure 4, the pair of first support members 55, the pair of second support members 56, the first connecting member 53, and the second connecting member 54 are integrally connected by fastening bolts B.

[0032] The configuration of the heat exchanger 30 will now be described with reference to Figure 5. As shown in Figure 5, the heat exchanger 30 has a first linear section 31, a second linear section 32, a third linear section 33, a connecting section 34, and a connecting section 35, all arranged to surround the rotation axis RX.

[0033] The first linear section 31 is arranged along the front wall section 41 so as to extend in the height direction HD. The second linear section 32 is arranged so as to extend in the height direction HD and so as to be perpendicular to the first linear section 31 when viewed from above. The third linear section 33 is arranged so as to extend in the height direction HD and so as to be perpendicular to the first linear section 31 when viewed from above. When the heat exchanger 30 is viewed from above along the rotation axis RX, the first linear section 31 is arranged so as to extend linearly parallel to the second horizontal axis HX2. The second linear section 32 and the third linear section 33 are arranged so as to extend linearly parallel to the first horizontal axis.

[0034] The connecting portions 34 and 35 are arranged to extend in the height direction HD and have a curved shape when viewed from above, along the rotation direction RD of the fan 10 (clockwise direction as shown in Figure 5). The connecting portion 34 connects one end of the first straight portion 31 to one end of the second straight portion 32. The connecting portion 35 connects the other end of the first straight portion 31 to one end of the third straight portion 33. The dotted lines shown in the heat exchanger 30 indicate the boundaries of the first straight portion 31, the second straight portion 32, the third straight portion 33, the connecting portion 34, and the connecting portion 35.

[0035] As shown in Figure 4, the housing 40 accommodates a pair of heat exchangers 30 arranged between the front wall 41 and the rear wall 42, along the direction in which the front wall 41 and the rear wall 42 extend. The second straight section 32 (see Figure 5) of the first heat exchanger 30 (the left heat exchanger 30 in Figure 4, shown in Figure 5) is connected via a connecting section 34 to the end of the first straight section 31 of the first heat exchanger 30 on the side of the second heat exchanger 30 (the right heat exchanger 30 in Figure 4).

[0036] The inventors' analysis revealed that when the first axial member 51 is positioned to pass above the first straight section 31, a velocity deficiency region DA occurs on the rotation axis RX side of the connecting section 34 shown in Figure 5. The velocity deficiency region DA is a region where the flow velocity of the airflow generated when the fan 10 is operating is slower than the surrounding area. For example, the velocity deficiency region DA refers to a region where the flow velocity is 0.5U or less, given that U is the average flow velocity around the entire circumference of the rotation axis RX.

[0037] The velocity deficit region DA occurs because the curved shape of the connecting portion 34 causes the airflow velocity to be slower than the surrounding area, and this region largely overlaps with the region where the airflow velocity is slower due to collision with the first axial member 51.

[0038] Therefore, in the outdoor unit 100 of this embodiment, as shown in Figure 5, the first connecting region 51C of the first axial member 51 connected to the front wall portion 41 is positioned so that, when viewed from above in a plan view along the rotation axis RX, it passes above the connecting portion 34. By positioning the first connecting region 51C so that it passes above the connecting portion 34, the region in which the airflow velocity slows down due to collision with the first axial member 51 is moved to the downstream side in the rotation direction RD. As a result, the overlap between the region in which the airflow velocity passing through is slower than the surrounding area due to the curved shape of the connecting portion 34 and the region in which the airflow velocity slows down due to collision with the first axial member 51 can be eliminated or reduced.

[0039] The functions and effects of the outdoor unit 100 of this embodiment, as described above, will now be explained.

[0040] According to the outdoor unit of the first aspect of this disclosure, in the heat exchanger 30, the connecting portion 34 that connects one end of the first straight portion 31 and one end of the second straight portion 32 has a curved shape along the rotation direction RD of the fan 10. The curved connecting portion 34 is a region where air is less likely to flow in compared to the first straight portion 31 and the second straight portion 32, and the flow velocity of the air guided from the heat exchanger 30 to the fan is slowed down.

[0041] Furthermore, the support mechanism 50 that supports the fan motor 20 in the support region SA has a first axial member 51, one end of which is attached to the front wall portion 41 and which is formed to extend toward the support region SA sandwiched between the front wall portion 41 and the rear wall portion 42. The airflow in the rotational direction RD generated by the fan 10 collides with the first axial member 51, causing the airflow velocity to decrease in the region downstream of the first axial member 51 in the rotational direction RD.

[0042] In the outdoor unit 100 of this embodiment, the first axial member 51 is positioned so as to pass through the connecting portion 34 when viewed from above. Compared to the case where the first axial member 51 is positioned in the first straight portion 31 located upstream of the connecting portion 34 in the rotational direction RD of the fan 10, the overlap between the region where the airflow velocity passing through the heat exchanger 30 is slower than the surrounding area due to the structure of the heat exchanger 30 and the region where the airflow velocity is slower due to collision with the support mechanism 50 of the fan motor 20 is suppressed. As a result, it is possible to suppress the occurrence of large pressure fluctuations on the surface of the fan and an increase in noise level when the fan passes through a region where most of these regions overlap.

[0043] In the outdoor unit 100 of this embodiment, by providing a first deflection region 51A on the first axial member 51 that is deflected at a first deflection angle θ11 of 30 degrees or more and 60 degrees or less with respect to a first horizontal axis HX1 perpendicular to the front wall portion 41, the first axial member 51 can be positioned so that it passes through the connecting portion 34 when viewed from above. Furthermore, rigidity can be applied in the direction in which the first deflection region 51A extends against vibrations acting on the fan motor 20 in each direction within the horizontal plane perpendicular to the drive shaft 21.

[0044] According to the outdoor unit 100 of the present embodiment, since a sufficient distance in the height direction HD from the support mechanism 50 to the fan 10 is secured, noise generated when the air blown by the fan 10 passes through the first shaft-shaped member 51 can be suppressed. Further, with respect to vibration in each direction acting on the fan motor 20 within the vertical plane where the first inclined region 51B is arranged, rigidity can be exerted in the direction in which the first inclined region 51B extends.

[0045] According to the outdoor unit 100 of the present embodiment, the length L1 of the first shaft-shaped member 51 in the height direction HD is set to 0.3 times or less the length L2 of the fan 10 in the height direction HD. Therefore, it is possible to appropriately suppress a decrease in air flow velocity caused by the collision of the air flow generated by rotation of the fan 10 against the first shaft-shaped member 51.

[0046] According to the outdoor unit 100 of the present embodiment, by preventing the heat exchanger 30 and the support mechanism 50 from being arranged at overlapping positions in the height direction HD, the overlap in the height direction between a region where the flow velocity of passing air is lower than the surroundings due to the structure of the heat exchanger 30 and a region where the flow velocity of air is decreased due to collision of the air with the support mechanism 50 of the fan motor 20 can be appropriately suppressed.

[0047] The outdoor unit according to the present disclosure described above can be grasped, for example, as follows.

[0048] An outdoor unit (100) according to a first aspect of the present disclosure includes: a fan motor (20) that rotates a drive shaft (21) extending in a height direction (HD); a fan (10) attached to the drive shaft and rotating about a rotation axis (RX) extending in the height direction; a heat exchanger (30) disposed below the fan; a housing (40) that houses the fan motor, the fan, and the heat exchanger, and is formed with an air outlet (45a) positioned above the fan and air inlets (41a, 43a) for taking in air from outside to be guided from the heat exchanger toward the air outlet; and a support mechanism (50) attached to the housing and supporting the fan motor in a support area (SA), wherein the housing includes a first wall portion (41) extending along the height direction, and a second wall portion (42) extending along the height direction and disposed parallel to the first wall portion, the support mechanism has a shaft-shaped member (51) having one end (51a) attached to the first wall portion and formed to extend toward the support area sandwiched between the first wall portion and the second wall portion, the heat exchanger includes: a first linear portion (31) disposed along the first wall portion so as to extend in the height direction; a second linear portion (32) disposed so as to extend in the height direction and disposed orthogonal to the first linear portion in a plan view; and a connecting portion (34) disposed so as to extend in the height direction, having a shape curved along the rotation direction of the fan in a plan view, and connecting one end of the first linear portion to one end of the second linear portion, and the shaft-shaped member is disposed so as to pass through the connecting portion in a plan view.

[0049] According to the outdoor unit of the first aspect of the present disclosure, in the heat exchanger, the connecting portion that connects one end of the first linear portion and one end of the second linear portion has a shape curved along the rotation direction of the fan. The connecting portion having the curved shape is a region where air is less likely to flow into compared to the first linear portion and the second linear portion, so the flow velocity of air guided from the heat exchanger to the fan is reduced.

[0050] Furthermore, the support mechanism that supports the fan motor in the support area has a shaft-shaped member, one end of which is attached to the first wall, and which is formed to extend toward the support area sandwiched between the first wall and the second wall. The rotational flow generated by the fan collides with the shaft-shaped member, causing the airflow velocity to decrease in the region downstream of the shaft-shaped member in the rotational direction.

[0051] According to the outdoor unit of the first aspect of this disclosure, the axial member is arranged to pass through the connecting portion when viewed from above. Compared to the case where the axial member is arranged in a straight section located upstream of the connecting portion in the direction of fan rotation, the overlap between the region where the airflow velocity is slower than the surrounding area due to the structure of the heat exchanger and the region where the airflow velocity is slower due to collision with the fan motor support mechanism is suppressed. As a result, it is possible to suppress the occurrence of large pressure fluctuations on the fan surface and increased noise levels when the fan passes through a region where most of these regions overlap.

[0052] An outdoor unit according to a second aspect of the present disclosure further comprises the following configuration in the first aspect: The axial member has a deflection region (51A) that extends in a direction deflected by a first deflection angle (θ11) of 30 degrees or more and 60 degrees or less with respect to a first horizontal axis (HX1) that is perpendicular to the first wall and passes through the drive shaft when viewed from above.

[0053] According to the outdoor unit of the second aspect of this disclosure, by providing a deflection region on the axial member that is deflected at a deflection angle of 30 degrees or more and 60 degrees or less with respect to a first horizontal axis perpendicular to the first wall, the axial member can be arranged so that it passes through the connecting portion when viewed from above. Furthermore, rigidity can be applied in the direction in which the deflection region extends against vibrations acting on the fan motor in each direction in the horizontal plane perpendicular to the drive shaft.

[0054] An outdoor unit according to a third aspect of the present disclosure further comprises the following configuration in the first or second aspect: The support mechanism is mounted at a mounting position of the housing at a first predetermined height (H1) in the height direction and supports the fan motor at a support position of a second predetermined height (H2) above the first predetermined height; and the shaft-shaped member has an inclined region (51B) that extends in a direction inclined at an inclination angle (θ12) of 30 degrees or more and 60 degrees or less with respect to the drive shaft from the first predetermined height to the second predetermined height.

[0055] According to the outdoor unit of the third aspect of this disclosure, sufficient height distance is ensured from the support mechanism to the fan, thereby suppressing noise generated when the air blown by the fan passes through the axial member. Furthermore, rigidity can be applied in the direction in which the inclined region extends against vibrations acting on the fan motor in each direction within the vertical plane in which the inclined region is located.

[0056] An outdoor unit according to a fourth aspect of this disclosure further comprises the following configuration in the first or second aspect: the length of the axial member in the height direction is set to 0.3 times or less the length of the fan in the height direction.

[0057] According to the outdoor unit of the fourth aspect of this disclosure, the length of the axial member in the height direction is set to 0.3 times or less the length of the fan in the height direction, so that the decrease in airflow velocity caused by the airflow generated by the rotation of the fan colliding with the axial member can be appropriately suppressed.

[0058] An outdoor unit according to a fifth aspect of this disclosure further comprises the following configuration in the first or second aspect: the position of the upper end of the heat exchanger in the height direction is lower than the position of the lower end of the support mechanism in the height direction.

[0059] According to the outdoor unit of the fifth aspect of this disclosure, by ensuring that the heat exchanger and the support mechanism are not positioned in a position where they overlap in the height direction, it is possible to appropriately suppress the overlap in the height direction between the region where the airflow velocity passing through the heat exchanger is slower than the surrounding area due to the structure of the heat exchanger and the region where the airflow velocity is slower due to the collision of the fan motor with the support mechanism.

[0060] An outdoor unit according to a sixth aspect of the present disclosure further comprises the following configuration in the first or second aspect: The housing houses a pair of heat exchangers arranged between the first wall and the second wall along the direction in which the first wall and the second wall extend, and the second straight portion of the first heat exchanger is connected to the end of the first straight portion of the first heat exchanger on the second heat exchanger side via the connecting portion.

[0061] According to the outdoor unit of the sixth aspect of this disclosure, in the first heat exchanger of a pair of heat exchangers arranged along the direction in which the first and second walls extend, air is particularly difficult to flow into the connecting portion located on the second heat exchanger side. This is because the first and second heat exchangers are adjacent to each other, and the presence of the second heat exchanger and the airflow into the second heat exchanger create a flow field that makes it difficult for air to flow into the first heat exchanger. According to the outdoor unit of the sixth aspect of this disclosure, it is possible to suppress the increase in noise level caused by such a flow field.

[0062] 10 Fan 20 Fan motor 21 Drive shaft 30 Heat exchanger 31 First straight section 32 Second straight section 33 Third straight section 34, 35 Connecting section 40 Housing 41 Front wall section (first wall section) 41a Intake port 42 Rear wall section (second wall section) 43, 44 Side wall section 43a Intake port 45 Top section 45a Outlet port 50 Support mechanism 51 First axial member 51A First deflection region 51B First inclined region 51C First connecting region 51a, 52a One end 52 Second axial member 52A Second deflection region 52B Second inclined region 52C Second connecting region 53 First connecting member 54 Second connecting member 55 First support member 56 Second support member 100 Outdoor unit B Fastening bolt DA Speed ​​deficiency region H1 First predetermined height H2 Second predetermined height HD Height direction HX1 First horizontal axis HX2 Second horizontal axis RX Rotation axis S Ground contact surface SA Support region θ11 First deflection angle θ12 First inclination angle θ21 Second deflection angle θ22 Second inclination angle

Claims

1. A fan motor that rotates a drive shaft extending in the height direction; a fan attached to the drive shaft and rotating about a rotation axis extending in the height direction; a heat exchanger positioned below the fan; a housing that houses the fan motor, the fan, and the heat exchanger and has an outlet located above the fan and an intake port for taking in air from the outside toward the outlet from the heat exchanger; a support mechanism attached to the housing and supporting the fan motor in a support area, wherein the housing has a first wall portion extending along the height direction and a second wall portion extending along the height direction and positioned parallel to the first wall portion; the support mechanism has a shaft-shaped member with one end attached to the first wall portion and formed to extend toward the support area sandwiched between the first wall portion and the second wall portion; the heat exchanger has a first straight portion positioned along the first wall portion so as to extend in the height direction, An outdoor unit having: a second linear section that extends in the height direction and is positioned perpendicular to the first linear section when viewed from above; and a connecting section that extends in the height direction and has a curved shape in line with the rotation direction of the fan when viewed from above, and connects one end of the first linear section to one end of the second linear section, wherein the axial member is positioned to pass through the connecting section when viewed from above.

2. The outdoor unit according to claim 1, wherein the axial member has a deflection region that extends in a direction deflected at a deflection angle of 30 degrees or more and 60 degrees or less with respect to a first horizontal axis that is perpendicular to the first wall and passes through the drive shaft when viewed from above.

3. The outdoor unit according to claim 1 or 2, wherein the support mechanism is attached to the housing at a first predetermined height in the height direction and supports the fan motor at a second predetermined height above the first predetermined height, and the shaft-shaped member has an inclined region that extends in a direction inclined at an angle of inclination of 30 degrees or more and 60 degrees or less with respect to the drive shaft from the first predetermined height to the second predetermined height.

4. The outdoor unit according to claim 1 or claim 2, wherein the length of the axial member in the height direction is set to 0.3 times or less the length of the fan in the height direction.

5. The outdoor unit according to claim 1 or claim 2, wherein the position of the upper end of the heat exchanger in the height direction is lower than the position of the lower end of the support mechanism in the height direction.

6. The outdoor unit according to claim 1 or 2, wherein the housing accommodates a pair of heat exchangers arranged between the first wall and the second wall along the direction in which the first wall and the second wall extend, and the second straight portion of the first heat exchanger is connected to the end of the first straight portion of the first heat exchanger on the second heat exchanger side via the connecting portion.

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