air conditioner

Abstract

To provide an outdoor unit 1 capable of suppressing noise generation. [Solution] An outdoor unit (1) for an air conditioner of the present invention includes a fan (4), a motor (5), and a motor support part (6). The motor support part (6) has a first inner upper folded piece (623), a first inner lower folded piece (624), a second inner upper folded piece (633), and a second inner lower folded piece (634). The first inner upper folded piece (623), the first inner lower folded piece (624), the second inner upper folded piece (633), and the second inner lower folded piece (634) are configured to have, on the sides facing the fan (4), a first upper uneven portion (623a), a first lower uneven portion (624a), a second upper uneven portion (633a), and a second lower uneven portion (634a), each having a plurality of wavy uneven shapes.

Description

[Technical Field]

[0001] One aspect of the present invention relates to an air conditioner. [Background technology]

[0002] The outdoor unit of an air conditioner has a fan that blows air to ensure effective heat exchange, and is configured with a motor support mechanism for supporting the fan and the motor that drives the fan. Patent Document 1 discloses an outdoor unit configured with a folded piece to reinforce the strength of the motor fixing support. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-31213 Summary of the Invention [Problem to be solved by the invention]

[0004] However, while the air conditioner is operating, the outdoor unit's fan rotates continuously, which can generate noise. While air conditioner outdoor units are required to have a structure to suppress such noise, conventional outdoor units lack such a structure. [Means for solving the problem]

[0005] An object of the present invention is to provide an outdoor unit for an air conditioner that is capable of suppressing noise generated when the fan rotates.

[0006] One aspect of the present invention is a display device comprising: a housing; a heat exchanger provided inside the housing; a fan provided in front of the heat exchanger; a motor that drives the fan; a motor support portion that supports the motor, The motor support portion is a motor connecting portion connected to the motor; a first base portion and a second base portion each having an elongated shape and extending in the vertical direction to support the motor connecting portion; a first inner upper folded piece provided on the first base portion above the motor connecting portion so as to extend from an end of the second base portion toward the fan; a first inner lower folded piece provided on the first base portion below the motor connecting portion so as to extend from an end of the second base portion toward the fan; a first outer folded piece provided so as to extend from an end of the first base portion opposite to the second base portion side toward the fan side; a second inner upper folded piece provided on the second base portion above the motor connecting portion so as to extend from an end of the second base portion on the first base portion side toward the fan side; a second inner lower folded piece provided on the second base portion below the motor connecting portion so as to extend from an end of the second base portion on the first base portion side toward the fan side; a second outer folded piece provided so as to extend from an end of the second base portion opposite to the first base portion side toward the fan side, The first inner upper folded piece, the first inner lower folded piece, the second inner upper folded piece, and the second inner lower folded piece have a first upper uneven portion, a first lower uneven portion, a second upper uneven portion, and a second lower uneven portion, each having a plurality of wave-shaped uneven shapes, on the side facing the fan. This is the outdoor unit of an air conditioner.

[0007] According to the outdoor unit of the air conditioner as described above, the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion of the motor support portion each have a plurality of wavy uneven shapes, so that the noise generated by pressure fluctuations between the edges (end faces) of the parts where these uneven portions are provided and the outer edge of the fan 4 passing in front of these parts can be dispersed, thereby suppressing the generated noise.

[0008] In the outdoor unit of the air conditioner described above, preferably, the number of convex portions in each of the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion is a prime number.

[0009] In the outdoor unit of the air conditioner described above, preferably, the number of convex portions in each of the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion is an odd number.

[0010] In the outdoor unit of the air conditioner described above, preferably, the total number of convex portions in the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion is a prime number or an odd number.

[0011] In the outdoor unit of the air conditioner described above, preferably, the first upper uneven portion and the first lower uneven portion have different numbers of convex portions, The second upper concave-convex portion and the second lower concave-convex portion have different numbers of convex portions.

[0012] In the outdoor unit of the air conditioner described above, preferably, the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion have different numbers of convex portions.

[0013] In the outdoor unit of the air conditioner described above, preferably, the first upper uneven portion and the first lower uneven portion have more convex portions located upstream in the rotation direction of the fan, Of the second upper uneven portion and the second lower uneven portion, the one located upstream in the rotation direction of the fan has more convex portions.

[0014] In the outdoor unit of the air conditioner described above, preferably, the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion have different numbers of convex portions, and the number of convex portions of each is a prime number or an odd number.

[0015] In the outdoor unit of the air conditioner described above, preferably, the number of convex portions in any one of the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion is not an even multiple of the number of convex portions in any of the others.

[0016] In the outdoor unit of the above-mentioned air conditioner, preferably, when viewed from the front, the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion are arranged in positions that overlap with the movement trajectory of the outer edge of the fan.

[0017] In the outdoor unit of the air conditioner described above, preferably, the first outer folded piece and the second outer folded piece each have a protrusion extending in a vertical direction so as to protrude outward, The protrusion has a substantially streamlined cross section in a direction perpendicular to the up-down direction.

[0018] In the outdoor unit of the air conditioner described above, preferably, the protrusion portion of at least one of the first outer folded piece and the second outer folded piece has a shape in which the approximately streamlined cross section in a direction perpendicular to the up-down direction is a combination of a first arc portion having a first radius of curvature and a second arc portion continuing from the first arc portion and having a second radius of curvature different from the first radius of curvature. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is an external view of an outdoor unit of an air conditioner. [Figure 2] FIG. 2 is a perspective view of the inside of the outdoor unit of the air conditioner. [Figure 3] FIG. 3 is a cross-sectional view of the outdoor unit of the air conditioner. [Figure 4] FIG. 4 is a perspective view of the motor support portion. [Figure 5] FIG. 5 is an enlarged view of the upper portion of the motor support. [Figure 6] FIG. 6 is an enlarged view of the lower part of the motor support. [Figure 7] FIG. 7 is an enlarged view of the vicinity of the upper end of the first outer folded piece. [Figure 8] FIG. 8 is a cross-sectional view of the first support portion. [Figure 9] FIG. 9 is a diagram showing the cross-sectional shape of the protrusion. [Figure 10] FIG. 10 is a cross-sectional view of a modified motor support portion. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of an outdoor unit for an air conditioner according to the present invention will be described in detail with reference to the drawings. However, the embodiment described below is merely an example of the present invention and is not intended to limit the technical scope of the present invention. In each drawing, the same components are designated by the same reference numerals, and their description may be omitted.

[0021] [Embodiment] [Overall configuration of outdoor unit 1 of air conditioner] The air conditioner of this embodiment includes an indoor unit and an outdoor unit, each having a heat exchanger, and supplies air at a desired temperature to the indoor space in which the indoor unit is located by circulating a refrigerant between the heat exchanger of the indoor unit and the heat exchanger of the outdoor unit and transferring heat via the refrigerant. Because the mechanism of such an air conditioner is known, a detailed description will be omitted in this embodiment and the description will focus on the characteristic parts. This embodiment is characterized by the outdoor unit of the air conditioner, and the following description will focus on the outdoor unit. Hereinafter, the outdoor unit of the air conditioner will be simply referred to as the "outdoor unit."

[0022] Fig. 1 is an external view of an outdoor unit 1 of this embodiment. As shown in Fig. 1, the outdoor unit 1 has a housing 2 that forms a box-shaped outer shell.

[0023] Fig. 2 is a perspective view of the inside of the housing 2 of the outdoor unit 1 of the air conditioner. Fig. 3 is a cross-sectional view of the outdoor unit 1 as seen from the side. As shown in Figs. 2 and 3, inside the housing 2, a heat exchanger 3, a fan 4, a motor 5, a motor support 6, a partition plate 11, a compressor 12, refrigerant piping 13, etc. are provided.

[0024] The internal space of the housing 2 is divided into a fan chamber and a machinery chamber by a partition plate 11. A compressor 12, refrigerant piping 13, etc. are arranged in the machinery chamber. A heat exchanger 3, a fan 4, a motor 5, a motor support 6, etc. are arranged in the fan chamber.

[0025] The heat exchanger 3 is provided along the rear and side surfaces of the housing 2 when viewed from above.

[0026] The fan 4 is a propeller fan provided in front of the heat exchanger 3. The fan 4 includes, for example, two blades, but the number and shape of the blades can be selected as desired. The fan 4 uses the two blades to draw air in from the rear of the outdoor unit 1 and expel this air toward the front, creating air circulation. This air circulation allows the outdoor unit 1 to efficiently exchange heat.

[0027] The motor 5 is a driving means for driving the fan 4 to rotate, and is connected to the fan 4. Specifically, the motor 5 has a shaft that extends forward, and the center of the fan 4 is connected to this shaft. When the motor 5 operates, the shaft rotates and transmits rotational force to the fan 4, causing the fan 4 to rotate.

[0028] [Motor support part 6] The motor support part 6 is a component for supporting the motor 5 together with the fan 4, and is a frame-shaped member extending from the bottom to the top of the outdoor unit 1. The motor support part 6 is made of metal, but is not limited to this. Specifically, the motor support part 6 has the following configuration.

[0029] Fig. 4 is a perspective view of the motor support portion 6. Fig. 5 is an enlarged view of an upper portion of the motor support portion 6. Fig. 6 is an enlarged view of a lower portion of the motor support portion 6. As shown in the figures, the motor support portion 6 includes a motor connecting portion 61, a first supporting portion 62, a second supporting portion 63, connection portions 64a to 64d, a lower connecting portion 65, and upper connecting portions 66 and 67.

[0030] The motor connecting portion 61 is connected to the motor 5 and supports the motor 5 at four points on the rear side. The motor connecting portion 61 is connected to the motor 5 by a connecting device such as a screw. The rear side of the motor 5 is open except for the area where the motor connecting portion 61 is provided.

[0031] The first support portion 62 and the second support portion 63 are provided on both left-right sides of the motor support portion 6, extending in the up-down direction. The connecting portions 64a to 64d extend to connect the first support portion 62 and the second support portion 63 in the left-right direction, i.e., the horizontal direction. The connecting portions 64a to 64d are arranged at approximately equal intervals in the order 64a, 64b, 64c, and 64d from the bottom, allowing the first support portion 62 and the second support portion 63 to stably support the motor 5. A substantially rectangular opening is provided between each of the connecting portions 64a to 64d. When the fan 4 is driven by the motor 5 to rotate and create an airflow, the air also flows through this opening.

[0032] The first support portion 62 includes a first base portion 621, a first outer folded piece 622, a first inner upper folded piece 623, and a first inner lower folded piece 624. The second support portion 63 includes a second base portion 631, a second outer folded piece 632, a second inner upper folded piece 633, and a second inner lower folded piece 634. The first support portion 62 and the second support portion 63 are generally symmetrical in shape, but the first inner upper folded piece 623 and the first inner lower folded piece 624 have different shapes from the second inner upper folded piece 633 and the second inner lower folded piece 634.

[0033] The first base portion 621 and the second base portion 631 are elongated portions that extend in the up-down direction on both left-right sides of the motor support portion 6. FIG. 8 is a cross-sectional view of the first support portion 62. The cross-sectional view of the second base portion 631 is symmetrical to the cross-sectional view of the first base portion 621 shown in FIG. 8. As shown in FIG. 8, the first base portion 621 has a recess 621a in its center. By making the first base portion 621 have a shape that includes the recess 621a rather than a simple flat plate shape, rigidity is increased, allowing the motor support portion 6 to stably support the motor 5. The second base portion 631 has a similar shape.

[0034] The first outer folded piece 622 is a portion of the first base 621 extending from the end opposite the second base 631 toward the fan 4. The first outer folded piece 622 is formed continuously with the first base 621 and is formed by folding back at the connection between the first outer folded piece 622 and the first base 621. As shown in the cross-sectional view of FIG. 8, a protrusion 622a is formed in the center of the first outer folded piece 622 so as to protrude outward, i.e., toward the side opposite the second base 631. The protrusion 622a is formed so as to extend in the vertical direction from near the upper end to near the lower end of the first outer folded piece 622. FIG. 7 is an enlarged view of the vicinity of the upper end of the first outer folded piece 622. As shown in FIG. 7, the vicinity of the upper end of the protrusion 622a has a curved shape.

[0035] FIG. 9 is a diagram illustrating the cross-sectional shape of protrusion 622a. As shown in FIGS. 8 and 9, protrusion 622a has a generally streamlined cross-sectional shape. More specifically, protrusion 622a has a cross-sectional shape formed by combining a small-diameter arc portion 71 and a large-diameter arc portion 72. The small-diameter arc portion 71 is an arc of a circle having a smaller radius of curvature (diameter) than the large-diameter arc portion 72, and the large-diameter arc portion 72 extends continuously from the small-diameter arc portion 71. The large-diameter arc portion 72 is positioned closer to fan 4 than the small-diameter arc portion 71. The central angle θ of the small-diameter arc portion 71 is 90° or greater.

[0036] The second outer folded piece 632 is a portion of the second base 631 that extends from the end opposite the first base 621 toward the fan 4. The second outer folded piece 632 is formed symmetrically to the first outer folded piece 622.

[0037] By configuring the first support portion 62 to have a first outer folded piece 622 with a generally streamlined cross section, and the second support portion 63 to have a second outer folded piece 632 with a generally streamlined cross section, rigidity is increased, allowing the motor support portion 6 to stably support the motor 5. Furthermore, by making the first outer folded piece 622 and the second outer folded piece 632 each generally streamlined, it is possible to prevent them from creating resistance to the wind passing through the outdoor unit 1, and to smooth the flow of the wind. This allows the input power to the motor 5 to be reduced.

[0038] 8, 5, and 4, the first inner upper folded piece 623 is a portion provided above the motor connecting portion 61 and extending from the end of the first base portion 621 on the second base portion 631 side toward the fan 4. As shown in FIGS. 8, 6, and 4, the first inner lower folded piece 624 is a portion provided below the motor connecting portion 61 and extending from the end of the first base portion 621 on the second base portion 631 side toward the fan 4. The first inner upper folded piece 623 and the first inner lower folded piece 624 are formed continuously with the first base 621, and are formed by being folded back at the connection portion between the first inner upper folded piece 623 and the first inner lower folded piece 624 and the first base 621.

[0039] A first upper uneven portion 623a is formed on the first inner upper folded piece 623. The first upper uneven portion 623a has an uneven shape including a plurality of wave-shaped convex portions. Specifically, the first upper uneven portion 623a has two wave-shaped convex portions.

[0040] A first lower uneven portion 624a is formed on the first inner lower folded piece 624. The first lower uneven portion 624a has an uneven shape including a plurality of wave-shaped convex portions. Specifically, the first lower uneven portion 624a has five wave-shaped convex portions.

[0041] 5 and 4, the second inner upper folded piece 633 is a portion provided above the motor connecting portion 61 and extending from the end of the second base portion 631 on the first base portion 621 side toward the fan 4. As shown in FIGS. 6 and 4, the second inner lower folded piece 634 is a portion provided below the motor connecting portion 61 and extending from the end of the second base portion 631 on the first base portion 621 side toward the fan 4. The second inner upper folded piece 633 and the second inner lower folded piece 634 are formed continuously with the second base 631 and are formed by being folded back at the connection portion between the second inner upper folded piece 633 and the second inner lower folded piece 634 and the second base 631.

[0042] A second upper uneven portion 633a is formed on the second inner upper folded piece 633. The second upper uneven portion 633a has an uneven shape including a plurality of wave-shaped convex portions. Specifically, the second upper uneven portion 633a has seven wave-shaped convex portions.

[0043] A second lower uneven portion 634a is formed on the second inner lower folded piece 634. The second lower uneven portion 634a has an uneven shape including a plurality of wave-shaped convex portions. Specifically, the second lower uneven portion 634a has three wave-shaped convex portions.

[0044] 2, 5, and 6 show movement locus 41 of the outer edge of fan 4. As can be seen from these figures, first upper uneven portion 623a, first lower uneven portion 624a, second upper uneven portion 633a, and second lower uneven portion 634a are provided at positions that overlap with movement locus 41 of the outer edge of fan 4 when viewed from the front (or rear).

[0045] In the above configuration, first upper uneven portion 623a has two wave-shaped convex portions, first lower uneven portion 624a has five wave-shaped convex portions, second upper uneven portion 633a has seven wave-shaped convex portions, and second lower uneven portion 634a has three wave-shaped convex portions. In this way, first upper uneven portion 623a, first lower uneven portion 624a, second upper uneven portion 633a, and second lower uneven portion 634a each have a prime number of convex portions, and the numbers of convex portions are not multiples of each other.

[0046] In this embodiment, fan 4 rotates counterclockwise when viewed from the front. Between first upper uneven portion 623a and first lower uneven portion 624a, first lower uneven portion 624a, which is located on the upstream side in the rotation direction of fan 4, has more convex portions, and between second upper uneven portion 633a and second lower uneven portion 634a, second upper uneven portion 633a, which is located on the upstream side in the rotation direction of fan 4, has more convex portions.

[0047] The lower connecting part 65 is provided at the lower end of the motor support part 6, and is fixed to the bottom surface of the outdoor unit 1 with connecting devices such as screws. The upper connecting parts 66 and 67 are provided at the upper end of the motor support part 6, and are fixed to the upper surface (top surface) of the outdoor unit 1 with connecting devices such as screws. This fixes the position of the motor support part 6 inside the housing 2.

[0048] [Variations] Fig. 10 is a cross-sectional view of first support portion 62b in this modified example. Unlike first support portion 62 in the embodiment shown in Fig. 8, first base portion 621b of first support portion 62b is a plate-like member that does not have a recess. In this way, first base portion 621b may have a shape that does not have a recess.

[0049] The number of convex portions in first upper uneven portion 623a, first lower uneven portion 624a, second upper uneven portion 633a, and second lower uneven portion 634a can be changed, and is preferably a prime number or an odd number. By doing so, it is possible to disperse noise generated by pressure fluctuations between the edges (end faces) of the portions where these convex portions are provided and the outer edge of fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0050] More preferably, the numbers of convex portions of the first lower concave-convex portion 624a, the second upper concave-convex portion 633a, and the second lower concave-convex portion 634a are not mutually related as even multiples. Note that an even multiple relationship means that the number of convex portions is not an even multiple, such as two or four times the number of any other convex portions, i.e., not 2n times (n is a natural number). In this way, sound generation can be more effectively suppressed.

[0051] It is also preferable that the total number of convex portions in first upper concave-convex portion 623a, first lower concave-convex portion 624a, second upper concave-convex portion 633a, and second lower concave-convex portion 634a be an odd number or a prime number, which can more effectively suppress noise generation.

[0052] In addition, a certain effect may be obtained by only including some of the characteristic parts of the configurations of the embodiments, and such partially modified configurations are also part of the present invention.

[0053] [Features of outdoor unit 1 of embodiment and modified example] As described above, the outdoor unit 1 of the air conditioner includes the housing 2, the heat exchanger 3 provided inside the housing 2, the fan 4 provided in front of the heat exchanger 3, the motor 5 that drives the fan 4, and the motor support portion 6 that supports the motor 5. The motor support portion 6 has a motor connecting portion 61, a first base portion 621, a second base portion 631, a first inner upper folded piece 623, a first inner lower folded piece 624, a first outer folded piece 622, a second inner upper folded piece 633, a second inner lower folded piece 634, and a second outer folded piece 632. The motor connecting portion 61 is connected to the motor 5. The first base portion 621 and the second base portion 631 are portions that support the motor connecting portion 61 and are provided to extend in the vertical direction. The first inner upper folded piece 623 is provided on the first base 621 above the motor connecting portion 61, extending from the end on the second base 631 side toward the fan 4. The first inner lower folded piece 624 is provided on the first base 621 below the motor connecting portion 61, extending from the end on the second base 631 side toward the fan 4. The first outer folded piece 622 is provided on the end of the first base 621 opposite the second base 631 side, extending toward the fan 4. The second inner upper folded piece 633 is provided on the second base 631 above the motor connecting portion 61, extending from the end on the first base 621 side toward the fan 4. The second inner lower folded piece 634 is provided on the second base 631 below the motor connecting portion 61, extending from the end on the first base 621 side toward the fan 4. The first inner upper folded piece 623, the first inner lower folded piece 624, the second inner upper folded piece 633, and the second inner lower folded piece 634 have, on the sides facing the fan 4, a first upper uneven portion 623a, a first lower uneven portion 624a, a second upper uneven portion 633a, and a second lower uneven portion 634a, each having a plurality of wavy uneven shapes.

[0054] According to the outdoor unit 1 as described above, the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a of the motor support portion 6 each have a plurality of wavy uneven shapes, thereby reducing the noise generated when wind passing through those portions comes into contact with those portions.

[0055] In the outdoor unit 1, it is preferable that the number of convex portions in the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a is a prime number. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0056] In the outdoor unit 1, it is preferable that the number of convex portions in each of the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a is an odd number. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0057] In the outdoor unit 1, it is preferable that the total number of convex portions in the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a is a prime number or an odd number. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0058] In the outdoor unit 1, it is preferable that the first upper uneven portion 623a and the first lower uneven portion 624a have a different number of convex portions, and that the second upper uneven portion 633a and the second lower uneven portion 634a have a different number of convex portions. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0059] In the outdoor unit 1, it is preferable that the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a have different numbers of convex portions. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0060] In the outdoor unit 1, it is preferable that the first upper uneven portion 623a and the first lower uneven portion 624a have more convex portions located upstream in the rotation direction of the fan 4, and the second upper uneven portion 633a and the second lower uneven portion 634a have more convex portions located upstream in the rotation direction of the fan 4. With this configuration, it is possible to disperse sound generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated sound.

[0061] In the outdoor unit 1, it is preferable that the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a have different numbers of convex portions, and that the number of convex portions is a prime number or an odd number. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0062] In the outdoor unit 1, it is preferable that the number of convex portions on any one of the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a is not an even multiple of the number of convex portions on the others. With this configuration, it is possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby suppressing the generated noise.

[0063] In the outdoor unit 1 described above, when viewed from the front, the first upper uneven portion 623a, the first lower uneven portion 624a, the second upper uneven portion 633a, and the second lower uneven portion 634a are preferably provided in positions that overlap with the movement trajectory 41 of the outer edge of the fan 4. Because noise is likely to be generated along the movement trajectory of the fan 4, such a configuration makes it possible to disperse noise generated by pressure fluctuations between the edges of the portions where these uneven portions are provided and the outer edge of the fan 4 passing in front of these portions, thereby further suppressing the generated noise.

[0064] In the outdoor unit 1, the first outer folded piece 622 and the second outer folded piece 632 each have a protrusion 622a extending in the vertical direction so as to protrude outward, and it is preferable that the protrusions 622a and 632a have a generally streamlined cross section in a direction perpendicular to the vertical direction. This configuration can smooth the flow of air passing near the first outer folded piece 622 and the second outer folded piece 632, thereby enabling more effective heat exchange.

[0065] In the outdoor unit 1, it is preferable that the generally streamlined cross section of the protrusions 622a and 632a of at least one of the first outer folded piece 622 and the second outer folded piece 632 be a shape that combines a first arc portion (small diameter arc portion 71) having a first radius of curvature and a second arc portion (large diameter arc portion 72) that continues from the first arc portion and has a second radius of curvature different from the first radius of curvature. With this configuration, the flow of air passing near the first outer folded piece 622 and the second outer folded piece 632 can be made smoother. [Explanation of symbols]

[0066] 1...Outdoor unit 2. Housing 3...Heat exchanger 4...Fan 5...Motor 6...Motor support 61...Motor connection part 62...First support part 621…First base 622…First lateral fold 623… First inner upper fold-back piece 623a…First upper concave-convex part 624…First inner side lower folding piece 624a…First lower concave-convex part 63…Second Support Department 631…Second base 632…Second lateral flap 633…Second inner upper folding piece 633a…Second upper concave-convex part 634…Second inner side downfolding piece 634a…Second lower concave-convex part 64a~64d…continue

Claims

1. The housing and a heat exchanger provided inside the housing; a fan provided in front of the heat exchanger; a motor that drives the fan; a motor support portion that supports the motor, The motor support portion is a motor connecting portion connected to the motor; a first base portion and a second base portion each having an elongated shape and extending in the vertical direction and supporting the motor connecting portion; a first inner upper folded piece provided on the first base portion above the motor connecting portion so as to extend from an end of the first base portion on the second base portion side toward the fan side; a first inner lower folded piece provided on the first base portion below the motor connecting portion so as to extend from an end of the first base portion on the second base portion side toward the fan side; a first outer folded piece provided so as to extend from an end of the first base portion opposite to the second base portion side toward the fan side; a second inner upper folded piece provided on the second base portion above the motor connecting portion so as to extend from an end of the second base portion on the first base portion side toward the fan side; a second inner lower folded piece provided on the second base portion below the motor connecting portion so as to extend from an end of the second base portion on the first base portion side toward the fan side; a second outer folded piece provided so as to extend from an end of the second base portion opposite to the first base portion side toward the fan side, the first inner upper folded piece, the first inner lower folded piece, the second inner upper folded piece, and the second inner lower folded piece each have a first upper uneven portion, a first lower uneven portion, a second upper uneven portion, and a second lower uneven portion, each having a plurality of wave-shaped uneven shapes, on the side facing the fan; Air conditioner outdoor unit.

2. the number of convex portions in the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion is a prime number, respectively. The outdoor unit of an air conditioner according to claim 1.

3. the number of convex portions in each of the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion is an odd number; The outdoor unit of an air conditioner according to claim 1.

4. a total number of convex portions in the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion is a prime number or an odd number; The outdoor unit of an air conditioner according to claim 1.

5. the first upper concave-convex portion and the first lower concave-convex portion have different numbers of convex portions, The second upper concave-convex portion and the second lower concave-convex portion have different numbers of convex portions. The outdoor unit of an air conditioner according to claim 1.

6. the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion have different numbers of convex portions from one another; The outdoor unit of an air conditioner according to claim 1.

7. the first upper uneven portion and the first lower uneven portion have more convex portions located upstream in the rotation direction of the fan; the second upper uneven portion and the second lower uneven portion have more convex portions located upstream in the rotation direction of the fan; The outdoor unit of an air conditioner according to claim 1.

8. the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion have different numbers of convex portions, and the numbers of the convex portions are prime numbers or odd numbers, The outdoor unit of an air conditioner according to claim 7.

9. the number of convex portions in any one of the first upper concave-convex portion, the first lower concave-convex portion, the second upper concave-convex portion, and the second lower concave-convex portion is not an even multiple of the number of convex portions in any other of the first upper concave-convex portion, The outdoor unit of an air conditioner according to claim 1.

10. When viewed from the front, the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion are provided at positions overlapping with a movement locus of an outer edge portion of the fan. The outdoor unit of an air conditioner according to claim 1.

11. the first outer folded piece and the second outer folded piece each have a protrusion extending in the up-down direction so as to protrude outward, The protrusion has a substantially streamlined cross section in a direction perpendicular to the up-down direction. The outdoor unit of an air conditioner according to claim 1.

12. the protrusion of at least one of the first outer folded piece and the second outer folded piece has a cross section perpendicular to the up-down direction that has a generally streamlined shape that is a combination of a first arc portion having a first radius of curvature and a second arc portion that is continuous with the first arc portion and has a second radius of curvature different from the first radius of curvature; The outdoor unit of an air conditioner according to claim 11.

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