Outdoor unit of air conditioner

Abstract

To reduce noise.SOLUTION: An outdoor unit includes: a heat exchanger 20 which includes a first erected part 21 which is erected, a second erected part 22 bent from an end part on one side in a horizontal direction of the first erected part 21 and extending in a predetermined direction, and a third erected part 23 which is bent from an end part on the other side in the horizontal direction of the first erected part 21, which extends in a predetermined direction, and in which a length in a predetermined direction is shorter than the second erected part 22, in which an internal space S is formed between the first erected part 21, the second erected part 22 and the third erected part 23, and which performs heat exchange between a refrigerant circulating inside a heat transfer pipe and the air flowing in the internal space S; an axial flow fan rotating around a central axis line C extending in a vertical direction, and for guiding the air which has passed through the heat exchanger 20 and has flowed in the internal space S upward; and a partition plate 40 provided on the third erected part 23 side in the internal space S so that a plate surface crosses a circumferential direction based on the central axis line C.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an outdoor unit of an air conditioner. [Background technology]

[0002] As an outdoor unit for an air conditioner, there is known an outdoor unit that has a fan provided at the top and a heat exchanger provided at the bottom, and blows air upward after heat exchange in the heat exchanger (for example, Patent Document 1). Patent Document 1 discloses an outdoor unit in which a heat exchanger having a substantially C-shaped horizontal cross section is provided below the fan. The heat exchanger described in Patent Document 1 has a first heat exchanger section arranged on the rear wall surface side, and a second heat exchanger section and a third heat exchanger section arranged on both the left and right wall surfaces. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-38312 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the outdoor unit of Patent Document 1, for example, if the length of the second heat exchanger section and the length of the third heat exchanger section of the heat exchanger are made different, the air in the internal space guided upward by the fan may flow slower in the space near the shorter heat exchanger section than in the other spaces. In this way, the flow speed in some spaces may become non-uniform in the axial (up-down) air flow speed in the circumferential direction around the central axis of the fan, and noise (for example, NZ sound: blade passing frequency sound) may increase.

[0005] The present disclosure has been made in consideration of the above circumstances, and has an object to provide an outdoor unit of an air conditioner that is capable of reducing noise. [Means for solving the problem]

[0006] In order to solve the above problems, the outdoor unit of the air conditioner of the present disclosure employs the following measures. An outdoor unit of an air conditioner according to one embodiment of the present disclosure has a first upright portion that is upright, a second upright portion that bends from one horizontal end of the first upright portion and extends in a predetermined direction, and a third upright portion that bends from the other horizontal end of the first upright portion and extends in the predetermined direction and has a length in the predetermined direction shorter than that of the second upright portion, and an internal space is formed between the first upright portion, the second upright portion, and the third upright portion, and the outdoor unit is equipped with a heat exchanger that exchanges heat between a refrigerant circulating inside a heat transfer tube and air flowing into the internal space, a fan that rotates around a central axis that extends in the vertical direction and guides upward the air that has passed through the heat exchanger and flowed into the internal space, and a plate portion provided on the third upright portion side of the internal space so that the plate surface intersects with a circumferential direction based on the central axis. Effect of the Invention

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

[0008] [Figure 1] FIG. 1 is a perspective view showing an outdoor unit according to a first embodiment of the present disclosure. [Diagram 2] 1 is a perspective view showing a main part of an outdoor unit according to a first embodiment of the present disclosure. [Diagram 3] FIG. 1 is a plan view showing an outdoor unit according to a first embodiment of the present disclosure. [Figure 4] FIG. 2 is a side view showing the outdoor unit according to the first embodiment of the present disclosure. [Diagram 5] FIG. 11 is a diagram showing the distribution of axially upward air flow speed in an outdoor unit according to a comparative example. [Figure 6] FIG. 11 is a diagram showing the distribution of axially upward air flow speed in an outdoor unit according to a comparative example. [Figure 7] 4 is a graph showing the relationship between frequency and sound pressure of noise generated from the outdoor unit according to the first embodiment of the present disclosure. [Figure 8] FIG. 11 is a perspective view showing a main portion of an outdoor unit according to a second embodiment of the present disclosure. [Figure 9] FIG. 11 is a plan view showing an outdoor unit according to a second embodiment of the present disclosure. [Figure 10] FIG. 11 is a front view showing a main part of an outdoor unit according to a second embodiment of the present disclosure. [Figure 11] FIG. 11 is a perspective view showing a main part of an outdoor unit according to a third embodiment of the present disclosure. [Figure 12] FIG. 11 is a front view showing a main part of an outdoor unit according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0010] [First embodiment] A first embodiment of the present disclosure will be described below with reference to Fig. 1 to Fig. 7. In the following description, the vertical direction is referred to as the Z-axis direction, the horizontal direction in which two axial fans 30, etc. are adjacent to each other is referred to as the X-axis direction, and the direction perpendicular to the X-axis and Z-axis directions is referred to as the Y-axis direction.

[0011] The outdoor unit 1 is used in an air conditioner. As shown in Figures 1 and 3, the outdoor unit 1 includes a housing 10 that forms an outer shell. The outdoor unit 1 further includes two heat exchangers 20, two axial flow fans (fans) 30, and two partition plates (plate portions) 40, which are provided inside the housing .

[0012] The housing 10 includes an upper casing 11 and a lower casing 12 provided below the upper casing 11 .

[0013] The upper casing 11 accommodates therein two axial flow fans 30. The upper casing 11 is open at its upper and lower ends.

[0014] The lower casing 12 accommodates therein two heat exchangers 20 and two partition plates 40. The lower casing 12 also accommodates therein various devices (not shown) such as a compressor and an accumulator. The lower casing 12 also accommodates an electrical box 13 at one end in the front direction.

[0015] The upper end of the lower casing 12 is open. As shown in Fig. 3, the lower casing 12 has side panels 12a that define both ends in the X-axis direction, a front panel 12b that defines one end (front end) in the Y-axis direction, and a rear panel 12c that defines the other end (rear end) in the Y-axis direction. The side panel 12a and the rear panel 12c are formed with openings (not shown), through which outside air can be taken in.

[0016] Two heat exchangers 20, two axial fans 30, and two partition plates 40 are housed 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 each arranged 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 each provided symmetrically with respect to a vertical plane passing through the center in the X-axis direction. Therefore, in the following, one will be described and the other will be omitted.

[0017] The heat exchanger 20 has a plurality of heat transfer tubes (not shown) and a plurality of fins (not shown) connected to the outer circumferential surfaces of the heat transfer tubes.

[0018] The heat exchanger 20 integrally has a first upright portion 21 that stands on a base (not shown), a second upright portion 22 that bends from one end of the first upright portion 21 in the X-axis direction and extends in the Y-axis direction (a specified direction), and a third upright portion 23 that bends from the other end of the first upright portion 21 in the X-axis direction and extends in the Y-axis direction.

[0019] Moreover, an internal space S is formed between the first upright portion 21, the second upright portion 22, and the third upright portion 23 of the heat exchanger 20. The internal space S is formed below the center of the axial flow fan 30. The heat exchanger 20 (the first upright portion 21, the second upright portion 22, and the third upright portion 23) exchanges heat between the refrigerant flowing inside the heat transfer tube and the air flowing into the internal space S.

[0020] The first standing portion 21 extends in the X-axis direction. The length of the first standing 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 standing portion 21 is provided so as to fit along the rear panel 12c of the lower casing 12.

[0021] The second standing portion 22 extends in the Y-axis direction. The second standing portion 22 is provided so as to fit along the side panel 12a of the lower casing 12.

[0022] The third standing portion 23 extends in the Y-axis direction. The length of the third standing portion 23 in the Y-axis direction is shorter than the length of the second standing portion 22 in the Y-axis direction. The length of the third standing portion 23 in the Y-axis direction is shorter than half the length of the second standing portion 22 in the Y-axis direction. The length of the third standing 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 standing portion 23 is disposed so as to be approximately parallel to the second standing portion 22. The third upright portion 23 is provided so as to overlap with the axial flow fan 30 in top view. In detail, the third upright portion 23 is provided so that a tip portion thereof overlaps with the axial flow fan 30 in top view.

[0023] 1 and 3, the axial fan 30 rotates about a central axis C (see FIG. 3) extending in the Z-axis direction (up-down direction), and guides upward the air that has passed through the heat exchanger 20 and flowed into the internal space S. The axial fan 30 has an impeller hub portion (hub portion) 31 and a plurality of blade portions 32 (three blades in this embodiment, as an example) provided on the outer circumferential surface of the impeller hub portion 31. As shown in FIG. 2, the axial fan 30 rotates counterclockwise when viewed from above (see arrow R in FIG. 3). The two axial fans 30 are disposed symmetrically with respect to a vertical plane passing through the center in the X-axis direction, but both axial fans 30 rotate in the same direction.

[0024] 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 beams 33a that extend in the Y-axis direction. The beams 33a connect the upper end of the first standing portion 21 and the upper end of the electrical box 13. The pair of beams 33a also hold a fan motor 33b for driving and rotating the axial fan 30 at the center in the Y-axis direction.

[0025] 2 and 3, the partition plate 40 is provided on the third upright portion 23 side of the internal space S so that the plate surface intersects with a circumferential direction based on the central axis C. The partition plate 40 is provided in the space closer to the third upright portion 23 than the second upright portion 22. In other words, the partition plate 40 is provided in the 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.

[0026] The partition plate 40 is disposed so that its position in the Y-axis direction is the same as the tip of the third standing portion 23. The partition plate 40 is disposed so that one end in the X-axis direction contacts the inner surface of the third standing portion 23 (the surface facing the internal space S) in a top view. As shown in FIG. 3, the partition plate 40 is provided so as to overlap the blade portion 32 of the axial flow fan 30 in a top view.

[0027] 4, the length L1 of the partition plate 40 in the Z-axis direction is longer than 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 set to the length from the central axis C to the tip of the blade portion 32.

[0028] As shown in FIG. 3, the tip portion (the end portion on the second upright portion 22 side) of the partition plate 40 is located at the center point P1 of the blade portion 32 in the radial direction or on the impeller hub portion 31 side of the center point P1.

[0029] 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 .

[0030] According to this embodiment, the following advantageous effects are obtained. In this embodiment, the heat exchanger 20 has a third upright portion 23 that bends from the other end of the first upright portion 21 in the X-axis direction, extends in the Y-axis direction, and has a length in the Y-axis direction shorter than that of the second upright portion 22. As a result, as shown in Figs. 5 and 6, the air in the internal space S that is guided upward by the axial fan 30 may flow slower in the space near the third upright portion 23 than in other spaces. Therefore, in the circumferential direction centered on the central axis C, the air flow speed in the axial direction (Z-axis direction) (up-down direction) may become non-uniform, which may increase noise (e.g., NZ sound). 5 and 6, the numbers written in the circumferential direction around the central axis C indicate the hour direction (direction at the clock position) around the central axis C. Also, the points on the outside indicate a faster air flow speed in the axial direction (Z-axis direction) (up-down direction), and the points on the inside indicate a slower air flow speed.

[0031] 5 and 6 are diagrams showing the distribution of air flow velocity in the axial direction (Z-axis direction) in the circumferential direction centered on the central axis C when no partition plate 40 is provided. Figs. 5 and 6 show the air flow velocity in the axial direction at each point in the circumferential direction centered on the central axis C.

[0032] As shown in Figures 5 and 6, it can be seen that the axial air flow velocity is slow in the area where the third upright portion 23 (especially the tip portion of the third upright portion 23) is provided (see the 2.0 o'clock direction in Figure 5 and the 10.0 o'clock direction in Figure 6).

[0033] In this embodiment, a partition plate 40 is provided on the third standing portion 23 side of the internal space S so that the plate surface intersects with the circumferential direction based on the central axis C. As a result, in the space near the third standing portion 23, air (see arrow A1 in FIG. 2) drawn by the rotating blade portion 32 of the axial flow fan 30 and flowing in the circumferential direction and air (see arrow A6 in FIG. 2) drawn by the flow sucked in from the 2.5 o'clock to 4.5 o'clock direction of the left axial flow fan 30 and from the 9.5 o'clock to 7.5 o'clock direction of the right axial flow fan 30 collide with the plate surface of the partition plate 40. The colliding air flows upward along the plate surface of the partition plate 40 (see arrow A2 in FIG. 2). As a result, the air flowing in the circumferential direction (see dashed arrow A3 in FIG. 2) can be blocked. For ease of illustration, the partition plate 40 of the left axial flow fan 30 is omitted in FIG. 2.

[0034] Therefore, the air flow speed in the axial direction (Z-axis direction) can be increased in the space near the third upright portion 23. Thus, the air flow speed in the axial direction (Z-axis direction) can be made uniform in the circumferential direction. In particular, the flow speed in the radial outer portion (the portion near the heat exchanger 20) of the axial flow fan 30 can be made uniform. Thus, noise (e.g., NZ sound) caused by the air flow speed in the axial direction (Z-axis direction) becoming non-uniform in the circumferential direction can be reduced.

[0035] The noise reduction effect will be described in detail with reference to Fig. 7. The solid line in Fig. 7 indicates the sound pressure (vertical axis) for each frequency (horizontal axis) in a comparative example (an example in which the partition plate 40 is not provided). The dashed line in Fig. 7 indicates the sound pressure (vertical axis) for each frequency (horizontal axis) in this embodiment (i.e., an example in which the partition plate 40 is provided). As shown in FIG. 7, in this embodiment, it is understood that the fourth-order NZ noise is reduced as compared with the comparative example.

[0036] In this embodiment, the partition plate 40 is provided at the upper part of the internal space S. This makes it easier to guide air upward in the space near the third standing portion 23. Therefore, it is possible to more suitably increase the air flow speed in the axial direction (Z-axis direction) in the space near the third standing portion 23. This makes it possible to make the air flow speed in the axial direction (Z-axis direction) more uniform in the circumferential direction. This makes it possible to further reduce noise caused by the air flow speed in the axial direction (Z-axis direction) being non-uniform in the circumferential direction.

[0037] In this embodiment, the vertical length of the partition plate 40 is longer than the radial length R1 of the axial flow fan 30. This allows the area of ​​the plate surface of the partition plate 40 to be increased. This makes it easier to guide air upward in the space near the third standing portion 23. Therefore, the air flow speed in the axial direction (Z-axis direction) can be more suitably increased in the space near the third standing portion 23. This makes it possible to make the air flow speed in the axial direction (Z-axis direction) more uniform in the circumferential direction. This allows the noise caused by the air flow speed in the axial direction (Z-axis direction) being non-uniform in the circumferential direction to be further reduced.

[0038] Furthermore, if the vertical length of partition plate 40 is too long, the resistance of the air flowing into the area downstream of partition plate 40 (the left side of partition plate 40 in Figure 4) will increase, which may reduce the overall air volume and increase the power consumption of the motor that drives axial fan 30. In this embodiment, the vertical length of the partition plate 40 is shorter than twice the radius of the axial flow fan 30. This makes it possible to suppress an increase in resistance of air flowing into the area downstream of the partition plate 40 (the left side of the partition plate 40 in FIG. 4). This makes it possible to suppress a decrease in the overall air volume. Also, it makes it possible to suppress an increase in power consumption of the motor that drives the axial flow fan 30.

[0039] In this embodiment, the end of the partition plate 40 on the second standing portion 22 side is located closer to the impeller hub portion 31 than the radial center point P1 of the blade portion 32. This allows the area of ​​the plate surface of the partition plate 40 to be increased. This makes it easier to guide air upward in the space near the third standing portion 23. Therefore, the air flow rate in the axial direction (Z-axis direction) can be more suitably increased in the space near the third standing portion 23. This makes it possible to make the air flow rate in the axial direction (Z-axis direction) more uniform in the circumferential direction. This makes it possible to further reduce noise caused by the air flow rate in the axial direction (Z-axis direction) being non-uniform in the circumferential direction.

[0040] Furthermore, in this embodiment, the partition plate 40 is fixed to the bracket 33 that supports the axial fan 30. This eliminates the need to provide a support part for fixing the partition plate 40 to the housing 10 separately from the bracket 33. This makes it possible to reduce the number of parts compared to the case where a separate support part is provided for fixing the partition plate 40 to the housing 10. This allows the structure to be simplified.

[0041] Second Embodiment Next, a second embodiment of the present disclosure will be described with reference to FIGS. This embodiment differs from the first embodiment in that the outdoor unit 1 includes a straightening plate (straightening portion) 50. Other points are similar to those of the first embodiment, so the same configurations are given the same reference numerals and detailed descriptions thereof are omitted.

[0042] As shown in Fig. 8, the rectifying plate 50 is a plate-shaped member and is provided above the partition plate 40. The rectifying plate 50 is fixed to the upper end of the partition plate 40. As shown in Fig. 9, the rectifying plate 50 extends linearly in the Y-axis direction along the third standing portion 23 in top view. One end of the rectifying plate 50 in the Y-axis direction is located at the same position in the Y-axis direction as the tip of the third standing portion 23 in the Y-axis direction. The rectifying plate 50 is disposed so as to overlap with the axial flow fan 30 in top view. 10, the straightening vane 50 is curved outward as it approaches the upper end. The vertical length of the straightening vane 50 is the same as half the length L2 from the upper end of the third upright portion 23 to the lower end 34a (see dashed line) of the bellmouth 34 of the axial flow fan 30.

[0043] In this embodiment, the air rising along the partition plate 40 can be guided radially outward by the straightening plate 50 (see arrow A4 in FIG. 8).

[0044] In the above description, the straightening vane 50 extends linearly in the Y-axis direction, but the present embodiment is not limited to this. For example, as shown by the dashed line in Fig. 9, the straightening vane 50 may be curved so as to fit along the tips of the blades 32 of the axial fan 30 in top view. In addition, in the above explanation, an example was described in which the straightening plate 50 is fixed to the upper end of the partition plate 40, but the straightening plate 50 may also be fixed to the upper end of the third upright portion 23 of the heat exchanger 20.

[0045] According to this embodiment, the following advantageous effects are obtained. In this embodiment, a straightening plate 50 is provided above the partition plate 40 and guides air radially outward. This allows the air guided upward by the partition plate 40 to be guided radially outward by the straightening plate 50. This makes it possible to make the air flow speed in the axial direction (Z-axis direction) of the air more uniform in the circumferential direction on the outer radial side. This makes it possible to further reduce noise caused by the air flow speed becoming non-uniform in the circumferential direction.

[0046] Third Embodiment Next, a third embodiment of the present disclosure will be described with reference to FIGS. This embodiment differs from the above-described first embodiment in that the outdoor unit 1 includes a connection portion 60. Since other points are similar to those of the first embodiment, the same configurations are given the same reference numerals and detailed description thereof will be omitted.

[0047] The surface of the connecting part 60 facing the internal space S (hereinafter referred to as the "inner surface") is curved as shown in FIG. 11. The connecting part 60 connects the upper end of the third upright part 23 of the heat exchanger 20 to the bell mouth 34. The connecting part 60 only needs to have a curved inner surface, and the shape thereof is not limited. The connecting part 60 may be, for example, a plate-shaped member or a block-shaped member. The connecting part 60 may also be formed of metal or polystyrene foam. The inner surface of the connection part 60 is curved. Specifically, as shown in Fig. 12, the inner surface of the connection part 60 has a convex part 60a that curves so as to protrude from the upper end of the third standing part 23 towards the internal space S, and a concave part 60b that protrudes from the upper end of the convex part 60a to the side opposite the internal space S. The upper end of the concave part 60b is connected to the lower end 34a of the bell mouth 34. The concave part 60b and the bell mouth 34 are connected to form a smooth continuous surface.

[0048] In this embodiment, the connection portion 60 ensures that the air rising along the partition plate 40 is spread and guided radially outward (to the outer periphery) of the axial fan 30 (see arrow A5 in FIGS. 11 and 12).

[0049] According to this embodiment, the following advantageous effects are obtained. In this embodiment, a plate-shaped connecting portion 60 is provided that connects the upper end of the third standing portion 23 of the heat exchanger 20 to the bell mouth 34. As a result, in the space near the third standing portion 23, air flows upward along the connecting portion 60, making it easier to guide the air upward. Therefore, the axial air flow rate can be more suitably increased in the space near the third standing portion 23. Therefore, the axial air flow rate can be made more uniform in the circumferential direction. Therefore, noise caused by the axial air flow rate being non-uniform in the circumferential direction can be further reduced. Moreover, air turbulence occurring in the space near the third upright portion 23 can be suppressed.

[0050] The present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit and scope of the present disclosure.

[0051] For example, the outdoor unit 1 according to the present disclosure may include both the straightening plate 50 described in the second embodiment and the connection portion 60 described in the third embodiment.

[0052] In addition, for example, in each of the above embodiments, the partition plate 40 is fixed to the bracket 33 or the third standing portion 23 of the heat exchanger 20, 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.

[0053] The outdoor unit of the air conditioner according to the embodiment described above can be understood, for example, as follows. The outdoor unit of an air conditioner according to a first aspect of the present disclosure has a first upright portion (21) that is upright, a second upright portion (22) that bends from one horizontal end of the first upright portion and extends in a predetermined direction, and a third upright portion (23) that bends from the other horizontal end of the first upright portion and extends in the predetermined direction and has a length in the predetermined direction shorter than that of the second upright portion, and an internal space (S) is formed between the first upright portion, the second upright portion, and the third upright portion, and the outdoor unit is equipped with a heat exchanger (20) that exchanges heat between a refrigerant circulating inside a heat transfer tube and air flowing into the internal space, a fan (30) that rotates about a central axis (C) that extends in the vertical direction and guides upward the air that has passed through the heat exchanger and flowed into the internal space, and a plate portion (40) provided on the third upright portion side of the internal space so that its plate surface intersects a circumferential direction based on the central axis.

[0054] In the above configuration, the heat exchanger has a third upright portion that bends from the other horizontal end of the first upright portion and extends in a predetermined direction, and has a length in the predetermined direction shorter than that of the second upright portion. This may cause the air in the internal space that is guided upward by the fan to flow slower in the space near the third upright portion than in other spaces. Therefore, the flow speed of the air blown upward in the axial direction (up and down direction) becomes non-uniform in the circumferential direction centered on the central axis, which may increase noise (e.g., NZ sound).

[0055] In the above configuration, a plate portion is provided on the third standing portion side of the internal space so that the plate surface intersects with the circumferential direction based on the central axis. As a result, in the space near the third standing 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 air flow speed in the axial direction can be increased in the space near the third standing portion. Therefore, the air flow speed in the axial direction can be made uniform in the circumferential direction. Therefore, noise (e.g., NZ sound) caused by the air flow speed in the axial direction being non-uniform in the circumferential direction can be reduced.

[0056] The "third standing portion side of the internal space" may be, for example, a space closer to the third standing portion than the second standing portion. Also, the "third standing portion side of the internal space" may be a space between the central axis of the fan and the third standing portion in a top view.

[0057] Further, in the outdoor unit of an air conditioner according to a second aspect of the present disclosure, in the above-mentioned first aspect, the plate portion is provided in an upper portion of the internal space.

[0058] In the above configuration, the plate portion is provided at the upper part of the internal space. This makes it easier to guide air upward in the space near the third upright portion. Therefore, the axial air flow rate can be more preferably increased in the space near the third upright portion. This makes it possible to make the axial air flow rate more uniform in the circumferential direction. This makes it possible to further reduce noise caused by the axial air flow rate being non-uniform in the circumferential direction.

[0059] Further, in the outdoor unit for an air conditioner according to a third aspect of the present disclosure, in the first or second aspect described above, the length of the plate portion in the up-down direction is longer than the radius of the fan.

[0060] In the above configuration, the vertical length of the plate portion is longer than the radial length of the fan. This allows the area of ​​the plate surface of the plate portion to be increased. This makes it easier to guide air upward in the space near the third standing portion. Therefore, the axial air flow rate can be more suitably increased in the space near the third standing portion. This makes it possible to make the axial air flow rate more uniform in the circumferential direction. This makes it possible to further reduce noise caused by the axial air flow rate being non-uniform in the circumferential direction.

[0061] Furthermore, an outdoor unit of an air conditioner according to a fourth aspect of the present disclosure is any one of the first to third aspects above, wherein the fan has a hub portion and a plurality of blade portions provided on the outer peripheral surface of the hub portion, and the end portion of the plate portion facing the second upright portion is located at the radial center of the blade portions or closer to the hub portion than the center.

[0062] In the above configuration, the end of the plate portion on the second upright portion side is located closer to the hub portion than the radial center of the wing portion. This makes it possible to increase the area of ​​the plate surface of the plate portion. This makes it easier to guide air upward in the space near the third upright portion. Therefore, it is possible to more suitably increase the axial air flow rate in the space near the third upright portion. This makes it possible to make the axial air flow rate more uniform in the circumferential direction. This makes it possible to further reduce noise caused by the axial air flow rate being non-uniform in the circumferential direction.

[0063] In addition, the outdoor unit of an air conditioner according to a fifth aspect of the present disclosure is the outdoor unit of any of the first to fourth aspects, further comprising a plate-shaped air straightening portion (50) that is provided above the plate portion and guides air radially outward.

[0064] In the above configuration, a straightening section is provided above the plate section and guides air radially outward. This allows the air guided upward by the plate section to be guided radially outward by the straightening section. This makes it possible to make the air flow speed in the axial direction (up and down direction) more uniform in the circumferential direction on the outer radial side. This makes it possible to further reduce noise caused by the air flow speed being non-uniform in the circumferential direction.

[0065] Furthermore, an outdoor unit of an air conditioner according to a sixth aspect of the present disclosure is any one of the first to fifth aspects, wherein the fan has a bell mouth (34) and is provided with a connection portion (60) connecting an upper end of the third upright portion of the heat exchanger to the bell mouth.

[0066] In the above configuration, a connection part is provided that connects the upper end of the third standing part of the heat exchanger with the bell mouth. This allows the connection part to reliably spread and guide the air rising along the partition plate to the radially outward (outer circumferential side) of the fan. This allows the air to flow upward along the connection part in the space near the third standing part, making it easier to guide the air upward. Therefore, the axial air flow rate can be more suitably increased in the space near the third standing part. This makes it possible to make the axial air flow rate more uniform in the circumferential direction. This makes it possible to further reduce noise caused by the axial air flow rate being non-uniform in the circumferential direction. [Explanation of symbols]

[0067] 1:Outdoor unit 10: Housing 11: Upper casing 12: Lower casing 12a: Side panel 12b: Front panel 12c: Rear panel 13: Electrical box 20: Heat exchanger 21: First erection section 22: Second erection section 23: Third erection section 30: Axial fan (fan) 31: Impeller hub (hub) 32: Wing part 33: Bracket 33a: Beam part 33b: Fan motor 34: Bellmouth 34a: Bottom end 40: Partition plate (plate part) 50: Rectifier plate (rectifier part) 60: Connection plate (connection part) 60a: Convex part 60b: recess S:Internal space

Claims

1. a first standing portion standing upright, a second standing portion bending from one horizontal end of the first standing portion and extending in a predetermined direction, and a third standing portion bending from the other horizontal end of the first standing portion and extending in the predetermined direction and having a length in the predetermined direction shorter than that of the second standing portion, wherein an internal space is formed between the first standing portion, the second standing portion, and the third standing portion, and a heat exchanger is performed between a refrigerant flowing inside the heat transfer tube and air flowing into the internal space; a fan that rotates about a central axis extending in a vertical direction and guides upward the air that has passed through the heat exchanger and flowed into the internal space; an outdoor unit for an air conditioner comprising: a plate portion provided on the third upright portion side of the internal space so that a plate surface intersects with a circumferential direction based on 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 vertical length of the plate portion is longer than a radial length of the fan.

4. The fan has a hub portion and a plurality of blade portions provided on an outer circumferential surface of the hub portion, 2 . The outdoor unit for an air conditioner according to claim 1 , wherein an end of the plate portion on the side of the second standing portion is located at the center of the blade portion in the radial direction or on the hub portion side relative to the center.

5. The outdoor unit of an air conditioner according to claim 1 , further comprising a plate-shaped straightening portion provided above the plate portion and directing air radially outward.

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

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