Outdoor unit for air conditioner

Abstract

The purpose of the outdoor unit according to the present disclosure is to reduce noise. The outdoor unit comprises: heat exchangers (20) that each have a first upright section (21) which stands upright, a second upright section (22) which bends from an end on one side in the horizontal direction of the first upright section (21) and extends in a prescribed direction, and a third upright section (23) which bends from the end on the other side in the horizontal direction of the first upright section (21), extends in the prescribed direction, and is shorter in length in the prescribed direction than the second upright section (22), the heat exchangers (20) each having an internal space (S) formed between the first upright section (21), the second upright section (22), and the third upright section (23), and exchanging heat between a refrigerant flowing through the inside of a heat transfer pipe and the air flowing into the internal space (S); an axial flow fan that rotates about a central axis (C) extending in the vertical direction, and guides the air, which has passed through the heat exchangers (20) and flowed into the internal spaces (S), upward; and a partition plate (40) that is provided on the third upright section (23) side of the internal space (S) such that the plate surface intersects the circumferential direction based on the central axis (C).

Description

Technical Field

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

[0002] As an outdoor unit for an air conditioner, an outdoor unit is known in which a fan is provided at an upper portion and a heat exchanger is provided at a lower portion, and air that has undergone heat exchange in the heat exchanger is blown upward (for example, PTL 1). PTL 1 discloses an outdoor unit in which a heat exchanger having a substantially C-shaped horizontal cross-sectional shape is provided below a fan. The heat exchanger described in PTL 1 includes a first heat exchanger portion disposed on a rear wall surface side, and a second heat exchanger portion and a third heat exchanger portion disposed on both left and right wall surface sides.Citation ListPatent Literature

[0003] [PTL 1] Japanese Unexamined Patent Application Publication No. 2006-38312Summary of InventionTechnical Problem

[0004] However, in the outdoor unit of PTL 1, for example, in a case where the length of the second heat exchanger portion of the heat exchanger and the length of the third heat exchanger portion are made different from each other, there is a possibility that the flow speed of the air in the internal space guided upward by the fan in the vicinity of the shorter heat exchanger portion may be lower than that in other spaces. In this way, the flow speed of the air in a part of the space is reduced, and thus the flow speed of an axial velocity component of the air (vertical direction) becomes non-uniform in the circumferential direction around the central axis of the fan, and there is a possibility that noise (for example, NZ noise: blade passing frequency noise) may increase.

[0005] The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide an air conditioner outdoor unit capable of reducing noise.Solution to Problem

[0006] An outdoor unit for an air conditioner according to an aspect of the present disclosure includes a heat exchanger that includes a first upright portion erected upright, a second upright portion bent from an end portion on one side of the first upright portion in a horizontal direction and extending in a predetermined direction, and a third upright portion bent from an end portion on the other side of the first upright portion in the horizontal direction, extending in the predetermined direction, and having a length in the predetermined direction shorter than a length in the predetermined direction of the second upright portion, and that performs heat exchange between a refrigerant flowing through a heat transfer tube and air flowing into an internal space, the internal space being defined by the first upright portion, the second upright portion, and the third upright portion; a fan that rotates around a central axis extending in a vertical direction and guides the air that has passed through the heat exchanger and has flowed into the internal space upward; and a plate portion that is provided on a third upright portion side of the internal space, such that a plate surface intersects with a circumferential direction with respect to the central axis. Advantageous Effects of Invention

[0007] According to the present disclosure, noise can be reduced.Brief Description of Drawings

[0008] FIG. 1 is a perspective view showing an outdoor unit according to a first embodiment of the present disclosure. FIG. 2 is a perspective view showing a main part of an outdoor unit according to the first embodiment of the present disclosure. FIG. 3 is a plan view showing an outdoor unit according to the first embodiment of the present disclosure. FIG. 4 is a side view showing an outdoor unit according to the first embodiment of the present disclosure. FIG. 5 is a view showing a distribution of an air flow speed of air flowing upward in an axial direction of an outdoor unit according to a comparative example. FIG. 6 is a view showing a distribution of a flow speed of air in an upward direction in an axial direction of an outdoor unit according to a comparative example. FIG. 7 is a graph showing a relationship between a frequency and a sound pressure of noise generated from the outdoor unit according to the first embodiment of the present disclosure. FIG. 8 is a perspective view showing a main part of an outdoor unit according to a second embodiment of the present disclosure. FIG. 9 is a plan view showing an outdoor unit according to a second embodiment of the present disclosure. FIG. 10 is a front view showing a main part of an outdoor unit according to a second embodiment of the present disclosure. FIG. 11 is a perspective view showing a main part of an outdoor unit according to a third embodiment of the present disclosure. FIG. 12 is a front view showing a main part of an outdoor unit according to a third embodiment of the present disclosure. Description of Embodiments

[0009] Hereinafter, an embodiment of an outdoor unit for an air conditioner according to the present disclosure will be described with reference to the drawings.[First Embodiment]

[0010] Hereinafter, the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 7. In the following description, a vertical direction is referred to as a Z-axis direction, a direction in which two axial fans 30 or the like are adjacent to each other in a horizontal direction is referred to as an X-axis direction, and a direction orthogonal to the X-axis direction and the Z-axis direction is referred to as a Y-axis direction.

[0011] The outdoor unit 1 is used in an air conditioner. As shown in FIGS. 1 and 3, the outdoor unit 1 includes a housing 10 that forms an outer shell.

[0012] In addition, the outdoor unit 1 includes two heat exchangers 20 provided inside the housing 10, two axial fans (fans) 30, and two partition plates (plate portions) 40.

[0013] The housing 10 includes an upper casing 11 and a lower casing 12 provided below the upper casing 11.

[0014] The upper casing 11 accommodates two axial fans 30 therein. The upper casing 11 has an upper end and a lower end which are open.

[0015] The lower casing 12 accommodates two heat exchangers 20 and two partition plates 40 therein. In addition, various devices (not shown) such as a compressor and an accumulator are accommodated in the lower casing 12. In addition, an electric box 13 is accommodated in the lower casing 12 at one end in the front direction.

[0016] The upper end of the lower casing 12 is open. In addition, as shown in FIG. 3, the lower casing 12 has side panels 12a defining both end portions in the X-axis direction, a front panel 12b defining one end portion (front end portion) in the Y-axis direction, and a rear panel 12c defining the other end portion (rear end portion) in the Y-axis direction.

[0017] Openings (not shown) are formed in the side panel 12a and the rear panel 12c, and outside air can be taken into the inside through the openings.

[0018] Two heat exchangers 20, two axial fans 30, and two partition plates 40 are accommodated inside the housing 10 of the outdoor unit 1. The two heat exchangers 20, the two axial fans 30, and the two partition plates 40 are disposed side by side in the X-axis direction. The two heat exchangers 20, the two axial fans 30, and the two partition plates 40 are provided symmetrically with respect to a vertical plane passing through the center in the X-axis direction. Therefore, in the following, one side will be described and the other side will be omitted.

[0019] The heat exchanger 20 includes a plurality of heat transfer tubes (not shown) and a plurality of fins (not shown) connected to an outer peripheral surface of the heat transfer tubes.

[0020] The heat exchanger 20 integrally has a first upright portion 21 that is erected on a base portion (not illustrated), a second upright portion 22 that is bent from an end portion of the first upright portion 21 on one side in the X-axis direction and extends in the Y-axis direction (predetermined direction), and a third upright portion 23 that is bent from an end portion of the first upright portion 21 on the other side in the X-axis direction and extends in the Y-axis direction.

[0021] In addition, the heat exchanger 20 has an internal space S formed between the first upright portion 21, the second upright portion 22, and the third upright portion 23. The internal space S is formed below the central portion of the axial fan 30. The heat exchanger 20 (the first upright portion 21, the second upright portion 22, and the third upright portion 23) performs heat exchange between the refrigerant flowing through the inside of the heat transfer tube and the air flowing into the internal space S.

[0022] The first upright portion 21 extends in the X-axis direction. The length of the first upright portion 21 in the X-axis direction is shorter than half the length of the outdoor unit 1 (lower casing 12) in the X-axis direction. The first upright portion 21 is provided so as to follow the rear panel 12c of the lower casing 12.

[0023] The second upright portion 22 extends in the Y-axis direction. The second upright portion 22 is provided so as to follow the side panel 12a of the lower casing 12.

[0024] The third upright portion 23 extends in the Y-axis direction. The length of the third upright portion 23 in the Y-axis direction is shorter than the length of the second upright portion 22 in the Y-axis direction. The length of the third upright portion 23 in the Y-axis direction is shorter than half the length of the second upright portion 22 in the Y-axis direction. The length of the third upright portion 23 in the Y-axis direction is shorter than half the length of the outdoor unit 1 in the Y-axis direction. The third upright portion 23 is disposed to be substantially parallel to the second upright portion 22.

[0025] The third upright portion 23 is provided to overlap the axial fan 30 in a top view. Specifically, the third upright portion 23 is provided such that a tip portion thereof overlaps with the axial fan 30 in a top view.

[0026] As shown in FIGS. 1 and 3, the axial fan 30 rotates around a central axis C (refer to FIG. 3) extending in a Z-axis direction (vertical direction) and guides air, which has passed through the heat exchanger 20 and has flowed into the internal space S upward. The axial fan 30 includes an impeller hub portion (hub portion) 31 and a plurality of (three as an example in the present embodiment) blade portions 32 provided on an outer peripheral surface of the impeller hub portion 31. As shown in FIG. 2, the axial fan 30 rotates counterclockwise in a top view (refer to an arrow R in FIG. 3).

[0027] The two axial fans 30 are disposed to be symmetrical with respect to a vertical plane passing through the center in the X-axis direction, but the rotation directions of the axial fans 30 are the same direction.

[0028] As shown in FIG. 1, a bracket 33 that supports the axial fan 30 from below is fixed to the housing 10. The bracket 33 has a pair of beam portions 33a extending in the Y-axis direction. The beam portion 33a connects the upper end portion of the first upright portion 21 and the upper end portion of the electric box 13. In addition, the pair of beam portions 33a holds a fan motor 33b for rotationally driving the axial fan 30 at a central portion in the Y-axis direction.

[0029] As shown in FIGS. 2 and 3, the partition plate 40 is provided on the third upright portion 23 side of the internal space S such that a plate surface intersects the circumferential direction with reference to the central axis C. The partition plate 40 is provided in a space closer to the third upright portion 23 than the second upright portion 22. In other words, the partition plate 40 is provided in a space between the central axis C of the axial fan 30 and the third upright portion 23 in a top view. The partition plate 40 is provided in the internal space S.

[0030] The partition plate 40 is disposed such that the position in the Y-axis direction is the same as the position of the tip of the third upright portion 23. In a top view, the partition plate 40 is disposed such that one end in the X-axis direction is in contact with the inner surface (surface facing the internal space S) of the third upright portion 23.

[0031] As shown in FIG. 3, the partition plate 40 is provided to overlap the blade portion 32 of the axial fan 30 in a top view.

[0032] As shown in FIG. 4, the length L1 of the partition plate 40 in the Z-axis direction is longer than the length of the radius R1 of the axial fan 30. In addition, the length L1 of the partition plate 40 in the Z-axis direction is shorter than twice the length of the radius R1 of the axial fan 30. The radius R1 of the axial fan 30 is a length from the central axis C to the tip of the blade portion 32.

[0033] As shown in FIG. 3, a tip portion (an end portion on the second upright portion 22 side) of the partition plate 40 is located at a center point P1 of the blade portion 32 in the radial direction or on the impeller hub portion 31 side with respect to the radial center point P1.

[0034] The partition plate 40 may be fixed to the third upright portion 23 of the heat exchanger 20, or may be fixed to the bracket 33.

[0035] According to the present embodiment, the following actions and effects are achieved. In the present embodiment, the heat exchanger 20 has the third upright portion 23 that is bent from the end portion on the other side in the X-axis direction of the first upright portion 21 and that extends in the Y-axis direction and that is shorter than the second upright portion 22 in the Y-axis direction. Accordingly, as shown in FIGS. 5 and 6, the air in the internal space S guided upward by the axial fan 30 may have a lower flow speed in the space in the vicinity of the third upright portion 23 than in other spaces. Therefore, in the circumferential direction around the central axis C, the flow speed of the air in the axial direction (Z-axis direction) (vertical direction) becomes non-uniform, and there is a possibility that noise (for example, NZ noise) may increase.

[0036] In FIGS. 5 and 6, the numbers described in the circumferential direction around the central axis C indicate the time direction (direction at the clock position) around the central axis C. In addition, the farther the point is outward, the faster the flow speed of the air in the axial direction (Z-axis direction) (vertical direction), and the closer the point is inward, the slower the flow speed of the air.

[0037] FIGS. 5 and 6 are diagrams showing a distribution of an air flow speed in an axial direction (Z-axis direction) in a circumferential direction around the central axis C in a case where the partition plate 40 is not provided. FIGS. 5 and 6 illustrate the flow speed of air in the axial direction at each point in the circumferential direction around the central axis C.

[0038] As shown in FIGS. 5 and 6, it can be seen that the flow speed of the air in the axial direction is low in the region where the third upright portion 23 (particularly, the tip portion of the third upright portion 23) is provided (refer to the 2.0 o'clock direction in FIG. 5 and the 10.0 o'clock direction in FIG. 6).

[0039] In the present embodiment, the partition plate 40 provided on the third upright portion 23 side of the internal space S so as to intersect the plate surface with the circumferential direction with reference to the central axis C is included. Accordingly, in a space in the vicinity of the third upright portion 23, air (refer to an arrow A1 in FIG. 2) that is pulled by the rotating blade portion 32 of the axial fan 30 and flows in the circumferential direction and air (refer to an arrow A6 in FIG. 2) that is pulled by a flow sucked in the 2:30 to 4:30 o'clock direction of the axial fan 30 on the left side and the 9:30 to 7:30 o'clock direction of the axial fan 30 on the right side and flows in the forward direction (the -Y direction) collide with the plate surface of the partition plate 40. The collided air flows upward along the plate surface of the partition plate 40 (refer to arrow A2 in FIG. 2). In this manner, the air flowing in the circumferential direction (refer to a broken line arrow A3 in FIG. 2) can be dammed. For the sake of illustration, the partition plate 40 of the axial fan 30 on the left side is omitted in FIG. 2.

[0040] Therefore, the flow speed of the air in the space in the vicinity of the third upright portion 23 in the axial direction (Z-axis direction) can be increased. Therefore, the circumferential distribution of the flow speed of the axial velocity component (Z-axis direction) can be made uniform. In particular, the flow speed can be made uniform in the outer portion of the axial fan 30 in the radial direction (the vicinity portion of the heat exchanger 20). Therefore, noise (for example, NZ noise) caused by the fact that the flow speed of air in the axial direction (Z-axis direction) is non-uniform in the circumferential direction can be reduced.

[0041] The noise reduction effect will be described in detail with reference to FIG. 7. A solid line in FIG. 7 indicates sound pressure (vertical axis) for each frequency (horizontal axis) in the comparative example (example in which the partition plate 40 is not provided). In addition, a broken line in FIG. 7 indicates sound pressure (vertical axis) for each frequency (horizontal axis) in the present embodiment (that is, an example in which the partition plate 40 is provided).

[0042] As shown in FIG. 7, in the present embodiment, it can be seen that the fourth-order NZ noise is reduced as compared with the comparative example.

[0043] In the present embodiment, the partition plate 40 is provided at the upper portion of the internal space S. In this manner, the air can be more easily guided upward in the space in the vicinity of the third upright portion 23. Therefore, in the space in the vicinity of the third upright portion 23, the flow speed of the air in the axial direction (Z-axis direction) can be more preferably increased. Therefore, the flow speed of the air in the axial direction (Z-axis direction) can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction (Z-axis direction) is non-uniform in the circumferential direction can be further reduced.

[0044] In the present embodiment, the length of the partition plate 40 in the vertical direction is longer than the length R1 of the radius of the axial fan 30. In this manner, the area of the plate surface of the partition plate 40 can be increased. In this manner, the air can be more easily guided upward in the space in the vicinity of the third upright portion 23. Therefore, in the space in the vicinity of the third upright portion 23, the flow speed of the air in the axial direction (Z-axis direction) can be more preferably increased. Therefore, the flow speed of the air in the axial direction (Z-axis direction) can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction (Z-axis direction) is non-uniform in the circumferential direction can be further reduced.

[0045] In addition, when the length of the partition plate 40 in the vertical direction is too long, the resistance of the air flowing into the region on the downstream side (left side of the partition plate 40 in FIG. 4) of the partition plate 40 increases, so that the total air volume may decrease and the power consumption of the motor that drives the axial fan 30 may increase.

[0046] In the present embodiment, the length of the partition plate 40 in the vertical direction is shorter than a length that is twice the radius of the axial fan 30. Therefore, it is possible to suppress an increase in resistance of air flowing into a region on the downstream side (left side of the partition plate 40 in FIG. 4) of the partition plate 40. Therefore, it is possible to suppress a decrease in the total air volume. In addition, it is possible to suppress an increase in power consumption of the motor that drives the axial fan 30.

[0047] In the present embodiment, the end portion of the partition plate 40 on the second upright portion 22 side is located on the impeller hub portion 31 side with respect to the center point P1 of the blade portion 32 in the radial direction. In this manner, the area of the plate surface of the partition plate 40 can be increased. In this manner, the air can be more easily guided upward in the space in the vicinity of the third upright portion 23. Therefore, in the space in the vicinity of the third upright portion 23, the flow speed of the air in the axial direction (Z-axis direction) can be more preferably increased. Therefore, the flow speed of the air in the axial direction (Z-axis direction) can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction (Z-axis direction) is non-uniform in the circumferential direction can be further reduced.

[0048] In addition, in the present embodiment, the partition plate 40 is fixed to the bracket 33 that supports the axial fan 30. Accordingly, it is not necessary to provide a support portion for fixing the partition plate 40 to the housing 10 separately from the bracket 33. Therefore, the number of parts can be reduced as compared with a case where a separate support portion for fixing the partition plate 40 to the housing 10 is provided. Therefore, the structure can be simplified.[Second Embodiment]

[0049] Next, a second embodiment of the present disclosure will be described with reference to FIGS. 8 to 10.

[0050] In the present embodiment, the outdoor unit 1 is different from the first embodiment in that the outdoor unit 1 includes a rectification plate (rectification portion) 50. Since other points are the same as those in the first embodiment, the same configurations are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0051] As shown in FIG. 8, the rectification plate 50 is plate-shaped member and is provided above the partition plate 40. The rectification plate 50 is fixed to the upper end of the partition plate 40. As shown in FIG. 9, the rectification plate 50 extends linearly in the Y-axis direction along the third upright portion 23 in a top view. One end portion of the rectification plate 50 in the Y-axis direction is at the same position as the tip of the third upright portion 23 in the Y-axis direction. The rectification plate 50 is disposed to overlap the axial fan 30 in a top view.

[0052] In addition, as shown in FIG. 10, the rectification plate 50 is curved outward toward the upper end. The length of the rectification plate 50 in the vertical direction is the same as the length L2 which is half the distance from the upper end of the third upright portion 23 to the lower end 34a (refer to a one-dot chain line) of the bell mouth 34 of the axial fan 30.

[0053] In the present embodiment, the rectification plate 50 can guide the air rising along the partition plate 40 to the outer side in the radial direction (refer to arrow A4 in FIG. 8).

[0054] In the above description, an example in which the rectification plate 50 extends linearly in the Y-axis direction has been described. However, the present embodiment is not limited thereto. For example, as shown by a broken line in FIG. 9, the rectification plate 50 may be curved to follow the tips of the blade portions 32 of the axial fan 30 in a top view.

[0055] In addition, in the above description, an example in which the rectification plate 50 is fixed to the upper end of the partition plate 40 has been described. However, the rectification plate 50 may be fixed to the upper end of the third upright portion 23 of the heat exchanger 20.

[0056] According to the present embodiment, the following actions and effects are achieved.

[0057] In the present embodiment, the rectification plate 50 that is provided above the partition plate 40 and guides air to the outer side in the radial direction is provided. In this manner, the air guided upward by the partition plate 40 can be guided to the outer side in the radial direction by the rectification plate 50. Therefore, the flow speed of the air in the axial direction (Z-axis direction) of the air in the circumferential direction on the outer side in the radial direction can be made more uniform. Therefore, noise caused by the non-uniformity of the air flow speed in the circumferential direction can be further reduced.[Third Embodiment]

[0058] Next, a third embodiment of the present disclosure will be described with reference to FIGS. 11 and 12.

[0059] In the present embodiment, the outdoor unit 1 is different from the first embodiment in that the outdoor unit 1 includes the connecting portion 60. Since other points are the same as those in the first embodiment, the same configurations are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0060] A surface (hereinafter, referred to as an "inner surface") facing the internal space S of the connecting portion 60 is a curved surface as shown in FIG. 11. The connecting portion 60 connects the upper end of the third upright portion 23 of the heat exchanger 20 and the bell mouth 34. The connecting portion 60 may have a curved inner surface, and the shape thereof is not limited. The connecting portion 60 may be, for example, a plate-shaped member or a block-shaped member. In addition, the connecting portion 60 may be formed of metal or may be formed of styrene foam.

[0061] The inner surface of the connecting portion 60 is curved. Specifically, as shown in FIG. 12, the inner surface of the connecting portion 60 has a convex portion 60a that is curved to protrude from the upper end of the third upright portion 23 toward the internal space S side and a recessed portion 60b that protrudes from the upper end of the convex portion 60a to a side opposite to the internal space S. The upper end of the recessed portion 60b is connected to the lower end 34a of the bell mouth 34. The recessed portion 60b and the bell mouth 34 are connected to each other to form a smooth continuous surface.

[0062] In the present embodiment, the connecting portion 60 can reliably spread and guide the air rising along the partition plate 40 to the radial outer side (outer peripheral side) of the axial fan 30 (refer to arrows A5 in FIGS. 11 and 12).

[0063] According to the present embodiment, the following actions and effects are achieved.

[0064] In the present embodiment, the connecting portion 60 which has a plate shape and connects the upper end of the third upright portion 23 of the heat exchanger 20 and the bell mouth 34 is provided. Accordingly, in the space in the vicinity of the third upright portion 23, the air flows upward along the connecting portion 60, so that the air can be more easily guided upward. Therefore, in the space in the vicinity of the third upright portion 23, the flow speed of the air in the axial direction can be more preferably increased. Therefore, the flow speed of the air in the axial direction can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction is non-uniform in the circumferential direction can be further reduced.

[0065] In addition, the turbulence of the air generated in the space in the vicinity of the third upright portion 23 can be suppressed.

[0066] The present disclosure is not limited to each of the above-described embodiments, and can be appropriately modified within a scope that does not depart from the gist of the present disclosure.

[0067] For example, the outdoor unit 1 according to the present disclosure may include both the rectification plate 50 described in the second embodiment and the connecting portion 60 described in the third embodiment.

[0068] In addition, for example, in each of the above-described embodiments, an example in which the partition plate 40 is fixed to the bracket 33 or the third upright portion 23 of the heat exchanger 20 has been described, but the present disclosure is not limited thereto. For example, a support portion for fixing the partition plate 40 to the housing 10 may be provided.

[0069] The outdoor unit for an air conditioner described in the above-described embodiment is understood as follows, for example.

[0070] An outdoor unit for an air conditioner according to a first aspect of the present disclosure includes a first upright portion (21) erected upright, a second upright portion (22) bent from an end portion on one side of the first upright portion in a horizontal direction and extending in a predetermined direction, and a third upright portion (23) upright portion in the horizontal direction, extending in the predetermined direction, and having a length in the predetermined direction shorter than a length in the predetermined direction of the second upright portion, and that performs heat exchange between a refrigerant flowing through a heat transfer tube and air flowing into an internal space (S), the internal space being defined by the first upright portion, the second upright portion, and the third upright portion, a fan (30) that rotates around a central axis (C) extending in a vertical direction and guides the air that has passed through the heat exchanger and has flowed into the internal space upward, and a plate portion (40) that is provided on a third upright portion side of the internal space, such that a plate surface intersects with a circumferential direction with respect to the central axis.

[0071] In the above configuration, the heat exchanger has the third upright portion that is bent from the end portion on the other side in the horizontal direction of the first upright portion and that extends in the predetermined direction and that is shorter than the second upright portion in the length in the predetermined direction. Accordingly, there is a possibility that the air in the internal space guided upward by the fan has a lower flow speed in the space in the vicinity of the third upright portion than in the other space. Therefore, in the circumferential direction around the central axis, the flow speed of the air blown upward in the axial direction (vertical direction) becomes non-uniform, and there is a possibility that noise (for example, NZ noise) may increase.

[0072] In the above configuration, the plate portion provided on the third upright portion side of the internal space so as to intersect the plate surface with the circumferential direction with reference to the central axis is included. Accordingly, in a space in the vicinity of the third upright portion, air flowing in the circumferential direction by the fan collides with the plate surface of the plate portion, and the collided air flows upward along the plate surface. Therefore, the flow speed of the air in the axial direction can be increased in the space in the vicinity of the third upright portion. Therefore, the flow speed of the air in the axial direction can be made uniform in the circumferential direction. Therefore, noise (for example, NZ noise) caused by the fact that the flow speed of air in the axial direction is non-uniform in the circumferential direction can be reduced.

[0073] The "third upright portion side of the internal space" may be, for example, a space closer to the third upright portion than the second upright portion. In addition, the "third upright portion side of the internal space" may be a space between the central axis of the fan and the third upright portion in a top view.

[0074] In addition, in the air conditioner outdoor unit according to the second aspect of the present disclosure, in the first aspect, the plate portion is provided at an upper portion of the internal space.

[0075] In the above configuration, the plate portion is provided at the upper portion of the internal space. In this manner, the air can be more easily guided upward in the space in the vicinity of the third upright portion. Therefore, in the space in the vicinity of the third upright portion, the flow speed of the air in the axial direction can be more preferably increased. Therefore, the flow speed of the air in the axial direction can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction is non-uniform in the circumferential direction can be further reduced.

[0076] In addition, according to a third aspect of the present disclosure, in the air conditioner outdoor unit according to the first aspect or the second aspect, a length of the plate portion in a vertical direction is longer than a length of a radius of the fan.

[0077] In the above configuration, the length of the plate portion in the vertical direction is longer than the length of the radius of the fan. In this manner, the area of the plate surface of the plate portion can be increased. In this manner, the air can be more easily guided upward in the space in the vicinity of the third upright portion. Therefore, in the space in the vicinity of the third upright portion, the flow speed of the air in the axial direction can be more preferably increased. Therefore, the flow speed of the air in the axial direction can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction is non-uniform in the circumferential direction can be further reduced.

[0078] In addition, in the air conditioner outdoor unit according to a fourth aspect of the present disclosure, in any one of the first to third aspects, the fan has a hub portion and a plurality of blade portions provided on an outer peripheral surface of the hub portion, and an end portion of the plate portion on a second upright portion side is located at a center of the blade portion in a radial direction or on a hub portion side with respect to the center.

[0079] In the above configuration, the end portion of the plate portion on the second upright portion side is located on the hub portion side with respect to the center of the blade portion in the radial direction. In this manner, the area of the plate surface of the plate portion can be increased. In this manner, the air can be more easily guided upward in the space in the vicinity of the third upright portion. Therefore, in the space in the vicinity of the third upright portion, the flow speed of the air in the axial direction can be more preferably increased. Therefore, the flow speed of the air in the axial direction can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction is non-uniform in the circumferential direction can be further reduced.

[0080] In addition, in the outdoor unit for an air conditioner according to a fifth aspect of the present disclosure, in any one of the first aspect to the fourth aspect, further includes a rectification portion (50) having a plate-shape that is provided above the plate portion and guides the air outward in a radial direction.

[0081] In the above configuration, the rectification portion that is provided above the plate portion and guides air to the outer side in the radial direction is provided. In this manner, the air guided upward by the plate portion can be guided to the outer side in the radial direction by the rectification portion. Therefore, the flow speed of the air in the upward direction of the axial direction (upward-downward direction) in the circumferential direction on the outer side in the radial direction can be made more uniform. Therefore, noise caused by the non-uniformity of the air flow speed in the circumferential direction can be further reduced.

[0082] In addition, in the air conditioner outdoor unit according to the sixth aspect of the present disclosure, in any one of the first to fifth aspects, the fan includes a bell mouth (34), and the outdoor unit further includes a connecting portion (60) that connects an upper end of the third upright portion of the heat exchanger and the bell mouth.

[0083] In the above configuration, the connecting portion connecting the upper end of the third upright portion of the heat exchanger and the bell mouth is provided. Accordingly, the connecting portion can reliably spread and guide the air rising along the partition plate to the radial outer side (outer peripheral side) of the fan. Accordingly, in the space in the vicinity of the third upright portion, the air flows upward along the connecting portion, so that the air can be more easily guided upward. Therefore, in the space in the vicinity of the third upright portion, the flow speed of the air in the axial direction can be more preferably increased. Therefore, the flow speed of the air in the axial direction can be made more uniform in the circumferential direction. Therefore, noise caused by the fact that the flow speed of air in the axial direction is non-uniform in the circumferential direction can be further reduced.Reference Signs List

[0084] 1: outdoor unit 10: housing 11: upper casing 12: lower casing 12a: side panel 12b: front panel 12c: rear panel 13: electric box 20: heat exchanger 21: first upright portion 22: second upright portion 23: third upright portion 30: axial fan (fan) 31: impeller hub portion (hub portion) 32: blade portion 33: bracket 33a: beam portion 33b: fan motor 34: bell mouth 34a: lower end 40: partition plate (plate portion) 50: rectification plate (rectification portion) 60: connection plate (connecting portion) 60a: convex portion 60b: recessed portion S: internal space

Claims

1. An outdoor unit for an air conditioner, comprising: a heat exchanger that includes a first upright portion erected upright, a second upright portion bent from an end portion on one side of the first upright portion in a horizontal direction and extending in a predetermined direction, and a third upright portion bent from an end portion on the other side of the first upright portion in the horizontal direction, extending in the predetermined direction, and having a length in the predetermined direction shorter than a length in the predetermined direction of the second upright portion, and that performs heat exchange between a refrigerant flowing through a heat transfer tube and air flowing into an internal space, the internal space being defined by the first upright portion, the second upright portion, and the third upright portion; a fan that rotates around a central axis extending in a vertical direction and guides the air that has passed through the heat exchanger and has flowed into the internal space upward; and a plate portion that is provided on a third upright portion side of the internal space, such that a plate surface intersects with a circumferential direction with respect to the central axis.

2. The outdoor unit for an air conditioner according to claim 1, wherein the plate portion is provided at an upper portion of the internal space.

3. The outdoor unit for an air conditioner according to claim 1, wherein a length of the plate portion in a vertical direction is longer than a length of a radius of the fan.

4. The outdoor unit for an air conditioner according to claim 1, wherein the fan has a hub portion and a plurality of blade portions provided on an outer peripheral surface of the hub portion, and an end portion of the plate portion on a second upright portion side is located at a center of the blade portion in a radial direction or on a hub portion side with respect to the center.

5. The outdoor unit for an air conditioner according to claim 1, further comprising: a rectification portion having a plate-shape that is provided above the plate portion and guides the air outward in a radial direction.

6. The outdoor unit for an air conditioner according to claim 1, wherein the fan includes a bell mouth, and the outdoor unit further comprises a connecting portion that connects an upper end of the third upright portion of the heat exchanger and the bell mouth.

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