air conditioner

Abstract

To provide an outdoor unit 1 capable of suppressing noise generation. [Solution] The outdoor unit 1 of the air conditioner of the present invention comprises 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. These first inner upper folded piece 623, first inner lower folded piece 624, second inner upper folded piece 633, and second inner lower folded piece 634 are configured to have 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 on the side facing the fan 4, each having a plurality of corrugated uneven shapes.

Description

Technical Field

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

Background Art

[0002] The outdoor unit of an air conditioner has a fan that blows air to effectively perform heat exchange, and is configured to include a motor support mechanism for supporting the fan and the motor that drives the fan. Patent Document 1 discloses an outdoor unit configured to provide a folded piece to reinforce the strength of a motor fixing support.

Prior Art Document

Patent Document

[0003]

Patent Document 1

[0007] In the outdoor unit of the air conditioner 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 section each have multiple waveform-shaped uneven shapes. This allows the sound 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 that passes in front of these parts to be dispersed, thereby suppressing the generated noise.

[0008] Preferably, in the outdoor unit of the air conditioner described above, the number of protrusions in 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] Preferably, in the outdoor unit of the air conditioner described above, the number of protrusions in the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion is odd.

[0010] Preferably, in the outdoor unit of the air conditioner described above, the total number of protrusions in the first upper protrusion, the first lower protrusion, the second upper protrusion, and the second lower protrusion is a prime number or an odd number.

[0011] Preferably, in the outdoor unit of the above-described air conditioner, the number of protrusions in the first upper uneven portion and the first lower uneven portion are different. The number of protrusions differs between the second upper uneven portion and the second lower uneven portion.

[0012] Preferably, in the outdoor unit of the air conditioner described above, the number of protrusions in the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion are different from each other.

[0013] Preferably, in the outdoor unit of the above-described air conditioner, the protrusions located on the upstream side in the rotational direction of the fan are greater than the first upper protrusions and the first lower protrusions. Between the second upper uneven portion and the second lower uneven portion, the protrusion located on the upstream side in the direction of rotation of the fan is more numerous.

[0014] Preferably, in the outdoor unit of the air conditioner described above, 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 protrusions, and the number of protrusions in each is either 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 concavo-convex portion, the first lower concavo-convex portion, the second upper concavo-convex portion, and the second lower concavo-convex portion is not in an even multiple relationship with the number of convex portions in the others.

[0016] In the outdoor unit of the air conditioner described above, preferably, when viewed from the front, the first upper concavo-convex portion, the first lower concavo-convex portion, the second upper concavo-convex portion, and the second lower concavo-convex portion are provided at positions overlapping the movement locus of the outer edge portion of the fan.

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

[0018] In the outdoor unit of the air conditioner described above, preferably, the substantially streamline-shaped cross section of the protrusion of at least one of the first outer folded-back piece and the second outer folded-back piece in a direction perpendicular to the vertical direction is a shape combined with a first arc portion having a first radius of curvature and a second arc portion having a second radius of curvature different from the first radius of curvature and continuous from the first arc portion.

Brief Description 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 an outdoor unit of an air conditioner. [Figure 3] FIG. 3 is a cross-sectional view of an outdoor unit of an air conditioner. [Figure 4] FIG. 4 is a perspective view of a motor support portion. [Figure 5] FIG. 5 is an enlarged view of the upper portion of a motor support portion. [Figure 6] FIG. 6 is an enlarged view of the lower portion of a motor support portion. [Figure 7] FIG. 7 is an enlarged view near the upper end of a first outer folded-back piece. [Figure 8] Figure 8 is a cross-sectional view of the first support section. [Figure 9] Figure 9 shows the cross-sectional shape of the protrusion. [Figure 10] Figure 10 is a cross-sectional view of a modified motor support. [Modes for carrying out the invention]

[0020] The following describes in detail an embodiment of the outdoor unit of the air conditioner of the present invention with reference to the drawings. However, the embodiments described below are merely examples of the present invention and are not intended to limit the technical scope of the present invention. In each drawing, the same components are denoted by the same reference numerals, and their descriptions may be omitted.

[0021] [Embodiment] [Overall configuration of the outdoor unit 1 of the air conditioner] The air conditioner of this embodiment includes an indoor unit and an outdoor unit, each having a heat exchanger. A refrigerant is circulated between the heat exchanger of the indoor unit and the heat exchanger of the outdoor unit, and heat is transferred via the refrigerant to supply air at the desired temperature to the room in which the indoor unit is located. Since the mechanism of such an air conditioner is known, this embodiment will omit a detailed explanation and focus on its features. 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 simply be referred to as the "outdoor unit".

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

[0023] Figure 2 is a perspective view of the inside of the housing 2 of the outdoor unit 1 of an air conditioner. Figure 3 is a cross-sectional view of the outdoor unit 1 viewed from the side. As shown in Figures 2 and 3, the inside of the housing 2 is equipped with a heat exchanger 3, a fan 4, a motor 5, a motor support 6, a partition plate 11, a compressor 12, and refrigerant piping 13, among other things.

[0024] The internal space of the enclosure 2 is divided into a blower room and a machine room by a partition plate 11. The machine room houses the compressor 12 and refrigerant piping 13, etc. The blower room houses the heat exchanger 3, fan 4, motor 5, and motor support 6, etc.

[0025] The heat exchanger 3 is positioned so as to follow the rear and side surfaces of the housing 2 when viewed from above.

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

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

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

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

[0030] The motor coupling section 61 is connected to the motor 5 and supports the motor 5 from four points at the rear. The motor coupling section 61 is connected to the motor 5 by fasteners such as screws. The rear of the motor 5 is open except in the area where the motor coupling section 61 is provided.

[0031] The first support section 62 and the second support section 63 are provided on both sides of the motor support section 6 in the left-right direction, extending in the vertical direction. The connecting sections 64a to 64d extend to connect the first support section 62 and the second support section 63 in the left-right direction, i.e., the lateral direction. The connecting sections 64a to 64d are arranged at roughly equal intervals from the bottom in the order 64a, 64b, 64c, and 64d, so that the first support section 62 and the second support section 63 can stably support the motor 5. A roughly rectangular opening is provided between each of the connecting sections 64a to 64d. When the fan 4 is driven and rotated by the motor 5 and an airflow is formed, air will also flow 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 shapes of the first inner upper folded piece 623 and the first inner lower folded piece 624 are different from those of 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 parts that extend vertically on both sides of the motor support portion 6 in the left-right direction. Figure 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 Figure 8. As shown in Figure 8, the first base portion 621 has a recess 621a in the center. By making the first base portion 621 a shape with a recess 621a rather than a simple flat plate, its rigidity is increased, and the motor support portion 6 can 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 that extends toward the fan 4 from the end opposite to the second base 631. The first outer folded piece 622 is formed continuously with the first base 621 and is formed by folding back at the connection point between the first outer folded piece 622 and the first base 621. As shown in the cross-sectional view of Figure 8, a projection 622a is formed in the central part of the first outer folded piece 622, projecting outward, that is, toward the side opposite to the second base 631. The projection 622a is provided to extend vertically from near the upper end to near the lower end of the first outer folded piece 622. Figure 7 is an enlarged view of the area near the upper end of the first outer folded piece 622. As shown in Figure 7, the area near the upper end of the projection 622a has a curved shape.

[0035] Figure 9 is a diagram illustrating the cross-sectional shape of the projection 622a. As shown in Figures 8 and 9, the cross-sectional shape of the projection 622a is substantially streamlined. More specifically, the cross-sectional shape of the projection 622a is a combination of a small-diameter circular arc 71 and a large-diameter circular arc 72. The small-diameter circular arc 71 is an arc of a circle with a smaller radius of curvature (diameter) than the large-diameter circular arc 72, and the large-diameter circular arc 72 extends continuously from the small-diameter circular arc 71. The large-diameter circular arc 72 is located closer to the fan 4 than the small-diameter circular arc 71. The central angle θ of the small-diameter circular arc 71 is 90° or greater.

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

[0037] The first support portion 62 has a first outer folded piece 622 with a substantially streamlined cross-section, and the second support portion 63 has a second outer folded piece 632 with a substantially streamlined cross-section. This configuration increases rigidity, 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 substantially streamlined, resistance to the wind passing through the outdoor unit 1 can be suppressed, allowing for smoother airflow. This reduces the power input to the motor 5.

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

[0039] A first upper uneven portion 623a is formed on the first inner upper folded portion 623. The first upper uneven portion 623a has an uneven shape that includes multiple wave-shaped protrusions. Specifically, the first upper uneven portion 623a has two wave-shaped protrusions.

[0040] A first lower uneven portion 624a is formed on the first inner lower folded portion 624. The first lower uneven portion 624a has an uneven shape that includes multiple wave-shaped protrusions. Specifically, the first lower uneven portion 624a has five wave-shaped protrusions.

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

[0042] A second upper uneven portion 633a is formed on the second inner upper folded portion 633. The second upper uneven portion 633a has an uneven shape that includes multiple wave-shaped protrusions. Specifically, the second upper uneven portion 633a has seven wave-shaped protrusions.

[0043] A second lower uneven portion 634a is formed on the second inner lower folded portion 634. The second lower uneven portion 634a has an uneven shape that includes multiple wave-shaped protrusions. Specifically, the second lower uneven portion 634a has three wave-shaped protrusions.

[0044] Figures 2, 5, and 6 show the movement trajectory 41 of the outer edge of the fan 4. As can be seen from these figures, the first upper protrusion 623a, the first lower protrusion 624a, the second upper protrusion 633a, and the second lower protrusion 634a are positioned so as to coincide with the movement trajectory 41 of the outer edge of the fan 4 when viewed from the front (or rear).

[0045] Furthermore, in the above configuration, the first upper uneven portion 623a has two waveform protrusions, the first lower uneven portion 624a has five, the second upper uneven portion 633a has seven, and the second lower uneven portion 634a has three. Thus, 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 each have a prime number of protrusions, and the number of protrusions is not a multiple of each other.

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

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

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

[0049] Furthermore, the number of protrusions 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 can be changed, and it is preferable to have a prime number or an odd number of protrusions for each. By doing so, the sound generated by pressure fluctuations between the edges (end faces) of the parts where these protrusions are provided and the outer edge of the fan 4 passing in front of these parts can be dispersed, thereby suppressing the generated sound.

[0050] More preferably, the number of protrusions in the first lower recessed portion 624a, the second upper recessed portion 633a, and the second lower recessed portion 634a are not multiples of an even number relative to each other. A multiple of an even number means that the number of protrusions in one portion is not twice, four times, or any other even multiple of the number of protrusions in any other portion, i.e., 2n times (where n is a natural number). This allows for more effective suppression of sound generation.

[0051] Furthermore, it is preferable that the total number of protrusions 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 be an odd number or a prime number. Doing so allows for more effective suppression of sound generation.

[0052] Furthermore, in some cases, certain effects can be achieved by incorporating only a portion of the characteristic features of the embodiment. Such modified configurations are also part of the present invention.

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

[0054] According to the outdoor unit 1 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 multiple waveform-shaped uneven shapes, thereby reducing the noise generated when wind passing through these portions comes into contact with them.

[0055] In the outdoor unit 1 described above, it is preferable that the number of protrusions 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 be a prime number. With this configuration, the sound generated by pressure fluctuations between the edges of the parts where these uneven portions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated sound.

[0056] In the outdoor unit 1 described above, it is preferable that the number of protrusions 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 be an odd number. With this configuration, the sound generated by pressure fluctuations between the edges of the parts where these uneven portions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated sound.

[0057] In the outdoor unit 1 described above, it is preferable that the total number of protrusions in the first upper protrusion 623a, the first lower protrusion 624a, the second upper protrusion 633a, and the second lower protrusion 634a be a prime number or an odd number. With such a configuration, the sound generated by pressure fluctuations between the edges of the parts where these protrusions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated noise.

[0058] In the outdoor unit 1 described above, it is preferable that the number of protrusions differs between the first upper uneven portion 623a and the first lower uneven portion 624a, and between the second upper uneven portion 633a and the second lower uneven portion 634a. With this configuration, the sound generated by pressure fluctuations between the edges of the parts where these uneven portions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated sound.

[0059] In the outdoor unit 1 described above, it is preferable that the number of protrusions on 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 different from each other. With this configuration, the sound generated by pressure fluctuations between the edges of the parts where these uneven portions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated sound.

[0060] In the outdoor unit 1 described above, it is preferable that the first upper uneven portion 623a and the first lower uneven portion 624a have more protrusions on the upstream side in the direction of rotation of the fan 4, and that the second upper uneven portion 633a and the second lower uneven portion 634a have more protrusions on the upstream side in the direction of rotation of the fan 4. With this configuration, the sound generated by pressure fluctuations between the edges 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 sound.

[0061] In the outdoor unit 1 described above, 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 each have a different number of protrusions, and that the number of protrusions in each portion is either a prime number or an odd number. With such a configuration, the sound generated by pressure fluctuations between the edges of the parts where these uneven portions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated sound.

[0062] In the outdoor unit 1 described above, it is preferable that the number of protrusions in any one of the first upper protrusions 623a, first lower protrusions 624a, second upper protrusions 633a, and second lower protrusions 634a is not an even multiple of the number of protrusions in the others. With this configuration, the sound generated by pressure fluctuations between the edges of the parts where these protrusions are provided and the outer edge of the fan 4 that passes in front of these parts can be dispersed, thereby suppressing the generated noise.

[0063] In the outdoor unit 1 described above, 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 are positioned to coincide with the movement trajectory 41 of the outer edge of the fan 4 when viewed from the front. Since noise is likely to occur along the movement trajectory of the fan 4, this configuration allows for the dispersion of noise generated by pressure fluctuations between the edges of the parts where these uneven portions are provided and the outer edge of the fan 4 passing in front of these parts, thereby further suppressing the generated noise.

[0064] In the outdoor unit 1 described above, the first outer folded piece 622 and the second outer folded piece 632 each have projections 622a and 632a that extend vertically so as to protrude outward, and it is preferable that the cross-section of the projections 622a and 632a in the direction perpendicular to the vertical direction is substantially streamlined. With this configuration, the airflow passing near the first outer folded piece 622 and the second outer folded piece 632 can be made smoother. This enables more effective heat exchange.

[0065] In the outdoor unit 1 described above, it is preferable that at least one of the protrusions 622a and 632a of the first outer folded piece 622 and the second outer folded piece 632 has a substantially streamlined cross-section in a direction perpendicular to the vertical direction, which is a combination of 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) having a second radius of curvature different from the first radius of curvature, which is continuous with the first arc portion. With such a configuration, the airflow 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…Cabinet 3...Heat exchanger 4…fan 5…motor 6…Motor support section 61...Motor connection section 62...First support part 621…First base 622…First lateral reflex flap 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 casing and A heat exchanger is provided inside the aforementioned housing, A fan is provided in front of the heat exchanger, A motor that drives the aforementioned fan, The motor includes a motor support portion that supports the motor, The motor support portion is A motor coupling portion connected to the motor, The motor connecting portion is supported by an elongated first base and a second base, which are provided to extend in the vertical direction, The first base portion is provided above the motor connection portion, with a first inner upper folded piece extending from the end on the second base portion side toward the fan side, The first base portion is provided below the motor connection portion, with a first inner lower folded piece extending from the end on the second base portion side toward the fan side, A first outer folded piece is provided so as to extend toward the fan side from the end of the first base opposite to the second base side, The second base portion is provided above the motor connection portion, with a second inner upper folded piece extending from the end on the first base portion side toward the fan side, The second base portion is provided below the motor connection portion, with a second inner lower folded piece extending from the end on the first base portion side toward the fan side, It has a second outer folded piece that extends from the end of the second base opposite to the first base 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 surfaces on the side facing the fan. Outdoor unit of an air conditioner.

2. The number of protrusions in 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. The outdoor unit of the air conditioner according to claim 1.

3. The number of protrusions in the first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion is odd. The outdoor unit of the air conditioner according to claim 1.

4. The sum of the number of protrusions in the first upper protrusion, the first lower protrusion, the second upper protrusion, and the second lower protrusion is a prime number or an odd number. The outdoor unit of the air conditioner according to claim 1.

5. The number of protrusions differs between the first upper uneven portion and the first lower uneven portion. The second upper uneven portion and the second lower uneven portion have different numbers of protrusions. The outdoor unit of the air conditioner according to claim 1.

6. The first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion each have a different number of protrusions. The outdoor unit of the air conditioner according to claim 1.

7. Between the first upper uneven portion and the first lower uneven portion, the protrusion located on the upstream side in the rotational direction of the fan is greater. Between the second upper uneven portion and the second lower uneven portion, the portion located on the upstream side in the rotational direction of the fan is larger. The outdoor unit of the air conditioner according to claim 1.

8. The first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion each have a different number of protrusions, and the number of protrusions in each is either a prime number or an odd number. The outdoor unit of the air conditioner according to claim 7.

9. The first upper uneven portion, the first lower uneven portion, the second upper uneven portion, and the second lower uneven portion are such that the number of protrusions in any one of them is not an even multiple of the number of protrusions in the other. The outdoor unit of the 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 positioned to coincide with the movement trajectory of the outer edge of the fan. The outdoor unit of the air conditioner according to claim 1.

11. The first outer folded piece and the second outer folded piece each have projections that extend vertically so as to protrude outward. The aforementioned projection has a substantially streamlined cross-section in the direction perpendicular to the vertical direction. The outdoor unit of the air conditioner according to claim 1.

12. The projection of at least one of the first outer folded piece and the second outer folded piece has a substantially streamlined shape in its cross-section in a direction perpendicular to the vertical direction, which is a combination of a first arc portion having a first radius of curvature and a second arc portion having a second radius of curvature different from the first arc portion, which is continuous with the first arc portion. The outdoor unit of the air conditioner according to claim 11.

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