Outdoor equipment for air conditioner

Abstract

To provide outdoor equipment for an air conditioner which can improve heard radiation efficiency of a heat sink.SOLUTION: Outdoor equipment 10 of an air conditioner according to the present invention has a housing 20 having an air inlet 11 and an air outlet 12, a rotating shaft 33, a ventilator 30 having a plurality of blades 32 connected to the rotating shaft 33 for blowing air from the air inlet 11 to the air outlet 12, a plurality of heat radiation fins 52 each having a plate shape for radiation of heat of an electronic component 42, and a heat sink 50 having a base 51 connected with the plurality of heat radiation fins 52. The heat radiation fin 52 has a base end 52n connected to the base 51 and extended along the rotation shaft 33, and a tip end 52m positioned away from the base 51. In the direction of extension from the base end 52n to the tip end 52m, the adjacent heat radiation fins among the plurality of heat radiation fins 52 are positioned in parallel to each other, and the direction of the extension is slightly inclined in a direction extended to the rotating shaft 33 relative to the vertical direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] As a conventional outdoor unit of an air conditioner, the outdoor unit of the air conditioner described in Patent Document 1 is known. This outdoor unit of the air conditioner includes a blower, an electric component box that houses electric control components that drive and control the blower, and a radiator attached to the electric component box. This radiator has multiple cooling fins that protrude integrally, and these cooling fins are spread out radially from each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-60928 Summary of the Invention [Problem to be solved by the invention]

[0004] In the outdoor unit of the air conditioner of Patent Document 1, the radiator cools the electrical component box by dissipating heat to air blown by a blower with the cooling fins of the radiator. However, since the multiple cooling fins are provided radially from each other, the air flow is likely to be disturbed in the spaces between the cooling fins, and the radiator may not be able to achieve a high heat dissipation effect.

[0005] In view of the above, an object of the present disclosure is to provide an outdoor unit for an air conditioner that can improve the heat dissipation efficiency of a heat sink. [Means for solving the problem]

[0006] An outdoor unit of an air conditioner according to one aspect of the present disclosure comprises a housing having an inlet and an outlet, a rotating shaft and a blower having a plurality of blades connected to the rotating shaft and blowing air from the inlet to the outlet, a plurality of plate-shaped heat dissipation fins for dissipating heat from electronic components, and a heat sink having a base to which the plurality of heat dissipation fins are connected, wherein the heat dissipation fins have a base end connected to the base and extending along the rotational shaft, and a tip end located away from the base, and the extension direction from the base end to the tip end is parallel to each other for the plurality of heat dissipation fins, and is oriented so as to be inclined in a direction toward the rotational shaft rather than vertically. Effect of the Invention

[0007] According to the aspect of the present disclosure, the base end of the heat dissipation fin extends along the rotation axis, so that the heat dissipation fin follows the flow of air from the inlet to the outlet by the blower. In addition, since the multiple heat dissipation fins are parallel to each other and are oriented so as to be inclined toward the rotation axis rather than the vertical direction, the heat dissipation fin follows the flow of air sucked into the blower in the blowing chamber. In this way, since the heat dissipation fin is provided along the flow of air by the blower, the air blown by the blower easily flows into the gaps between the heat dissipation fins, and the air easily flows smoothly in the gaps between the heat dissipation fins. As a result, the air flow in the gaps between the heat dissipation fins promotes heat dissipation from the heat dissipation phone, and the heat dissipation efficiency of the heat sink can be improved. [Brief description of the drawings]

[0008] [Figure 1] 1 is a front view of an outdoor unit of an air conditioner with a fan guard and a front wall removed according to an embodiment of the present disclosure. [Diagram 2] 2 is a cross-sectional view of an outdoor unit of an air conditioner equipped with a fan guard and a front wall, taken along line AA in FIG. 1. [Diagram 3] FIG. 4 is a front view of the heat sink and the electrical box. [Figure 4]FIG. 4 is a diagram showing an extension direction of a first heat dissipation fin of the heat sink. [Diagram 5] 13 is a diagram showing an extension direction of a fourth heat dissipation fin of the heat sink. FIG. [Figure 6] 13 is a diagram showing an extension direction of a sixth heat dissipation fin of the heat sink. FIG. [Figure 7] 13 is a front view of a heat sink and a blower in an outdoor unit of an air conditioner according to a modified example of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An outdoor unit 10 of an air conditioner according to an embodiment of the present disclosure includes a housing 20, as shown in the examples of Figures 1 and 2. The housing 20 is a rectangular parallelepiped with an internal space, and has an inlet 11 and an outlet 12. Hereinafter, the side of the outlet 12 relative to the inlet 11 will be referred to as the front, and the opposite side will be referred to as the rear. Furthermore, directions that are perpendicular to the front-to-rear direction and perpendicular to each other will be referred to as the up-down direction and the left-to-right direction, but the directions related to the outdoor unit 10 are not limited to these.

[0010] The housing 20 is made of, for example, metal, and has a front wall 21, a rear wall 22, an upper wall 23, a lower wall 24, a left wall 25, and a right wall 26. These walls are rectangular flat plates and surround the periphery of the internal space of the housing 20. The front wall 21 and the rear wall 22 face each other with a gap between them in the front-to-rear direction, the upper wall 23 and the lower wall 24 face each other with a gap between them in the up-down direction, and the left wall 25 and the right wall 26 face each other with a gap between them in the left-right direction.

[0011] Furthermore, a partition wall 27 is provided within the housing 20. The partition wall 27 is disposed between the left wall 25 and the right wall 26 in the left-right direction, and divides the internal space of the housing 20 into a blower chamber 28 and a machine chamber 29. The blower chamber 28 is the space between the partition wall 27 and the left wall 25, and the machine chamber 29 is the space between the partition wall 27 and the right wall 26. In the machine chamber 29, devices such as the compressor 14 that compresses the refrigerant, an accumulator, and an expansion valve are disposed.

[0012] A rectangular intake port 11 that draws air into the housing 20 is opened in the rear wall 22, and a circular outlet port 12 that blows air out of the housing 20 is opened in the front wall 21. The intake port 11 is provided across the rear wall 22 of the blower chamber 28 and the machine chamber 29, whereas the outlet port 12 is not provided in the front wall 21 of the machine chamber 29 but is provided in the front wall 21 of the blower chamber 28. When viewed in the front-to-rear direction, the outlet port 12 is arranged to overlap with the intake port 11. The intake port 11 and the outlet port 12 connect the blower chamber 28 of the housing 20 to the outside of the housing 20.

[0013] Furthermore, the outdoor unit 10 is equipped with a fan guard 13 that covers the entire air outlet 12. The fan guard 13 is made of, for example, resin, and has a large number of air vents 13a. The fan guard 13 is attached to the front wall 21. Air flows from the suction port 11 into the blower chamber 28 of the housing 20, and is exhausted from the air outlet 12 to the outside of the housing 20 through the air vents 13a of the fan guard 13.

[0014] Furthermore, the outdoor unit 10 includes a heat exchanger 15 disposed in the blower chamber 28 of the housing 20. The heat exchanger 15 is disposed along the rear wall 22 so as to cover the suction port 11, and has a plurality of heat exchange fins 16 and a refrigerant pipe 17. The heat exchange fins 16 are plate-shaped, arranged in parallel with a gap between them in the front-rear direction, and extend in the up-down direction. The refrigerant pipe 17 is disposed so as to meander in the left-right direction and up-down direction while being perpendicular to the heat exchange fins 16. The air passes between the heat exchange fins 16 and around the refrigerant pipe 17, and exchanges heat with the refrigerant flowing through the refrigerant pipe 17.

[0015] Furthermore, the outdoor unit 10 is provided with a blower 30 facing the outlet 12. The blower 30 is disposed between the outlet 12 and the inlet 11 in the blower chamber 28, and has a blower motor 31 and a plurality of blades 32. The blower motor 31 is provided with a drive unit 31a and a rotating shaft 33 as its output shaft. The drive unit 31a has a stator and a rotor to which the rotating shaft 33 is connected, and the rotating shaft 33 rotates as the rotor rotates relative to the stator. The rotating shaft 33 is a cylindrical shaft and extends forward from the drive unit 31a.

[0016] The blades 32 extend radially from the rotating shaft 33, have inner and outer ends in the extending direction, and the inner ends are connected to the rotating shaft 33. The multiple blades 32 are arranged at intervals in the circumferential direction of the rotating shaft 33. An outer peripheral circle 32a, which is an imaginary circle passing through the outer ends of the multiple blades 32, shares a center with the rotating shaft 33. When the drive unit 31a of the blower motor 31 is driven, the multiple blades 32 rotate around the rotating shaft 33, and the blower 30 blows air toward the outlet 12 in the blowing chamber 28. As a result, air flows from the suction port 11 into the blowing chamber 28.

[0017] Furthermore, the outdoor unit 10 is equipped with a bellmouth 18 that adjusts the flow of air from the blower 30. The bellmouth 18 is annular with an axis extending in the front-rear direction, and the blower 30 is arranged coaxially inside the bellmouth 18, surrounding the periphery of the blades 32 of the blower 30. The front end of the bellmouth 18 is connected to the front wall 21, and surrounds the periphery of the air outlet 12 of the front wall 21. In the front-rear direction, the rear end of the bellmouth 18 is provided forward of the rear ends of the blades 32 of the blower 30.

[0018] The outdoor unit 10 further includes an electrical equipment box 40. As shown in Fig. 1 and Fig. 3, the electrical equipment box 40 is, for example, a rectangular parallelepiped box having an internal space and an opening 41. The electrical equipment box 40 accommodates, in its internal space, an electronic circuit board 43 on which electronic components 42 are mounted. The electronic components 42 are used to control devices of the outdoor unit 10, such as the blower 30 and the compressor 14.

[0019] Moreover, opening 41 of electrical box 40 is provided at a lower part of electrical box 40 in blower chamber 28, and faces electronic circuit board 43. Electrical box 40 is disposed between upper wall 23 and partition wall 27 of housing 20 in the vertical direction, and is attached to upper wall 23. Electrical box 40 extends in the left-right direction on partition wall 27, and is disposed across both the upper right part of blower chamber 28 and the upper part of machine chamber 29.

[0020] Furthermore, the outdoor unit 10 is provided with a heat sink 50 for dissipating heat from the electronic components 42 of the electrical equipment box 40. The heat sink 50 is disposed outside the bell mouth 18 in the blower chamber 28. The heat sink 50 is made of a metal with excellent thermal conductivity such as aluminum, and has a base 51 and a plurality of heat dissipation fins 52. The heat dissipation fins 52 are connected to the base 51, and the base 51 and the heat dissipation fins 52 are integrally formed.

[0021] The base 51 is, for example, a rectangular flat plate, and has a surface 51a and a back surface on the opposite side in the thickness direction. The heat sink 50 is attached to the electrical box 40 such that the base 51 covers the opening 41 of the electrical box 40. The heat sink 50 may be attached to a portion of the electrical box 40 other than the opening 41, such as the outer surface of the electrical box 40.

[0022] For example, the back surface of the base 51 is located inside the electrical box 40 and directly contacts the heat-generating electronic component 42 or the electronic circuit board 43 on which the electronic component 42 is mounted, or indirectly contacts the electronic component 42 via another heat transfer body. Also, the surface 51a of the base 51 and the heat dissipation fins 52 connected to the surface 51a are located outside the electrical box 40. As a result, heat generated from the electronic component 42 and the like is transferred to the heat dissipation fins 52 via the base 51 of the heat sink 50, and is dissipated to the surroundings by the heat dissipation fins 52. As a result, the temperature rise of the electronic component 42 is suppressed.

[0023] The heat dissipating fin 52 is, for example, a rectangular flat plate, and has a base end 52n connected to the surface 51a of the base 51 and a tip 52m on the opposite side. As shown in Fig. 2, the base end 52n of the heat dissipating fin 52 extends along the rotation shaft 33 of the blower 30, and extends in the front-rear direction between the inlet 11 and the outlet 12 in the blowing chamber 28. As shown in Figs. 1 and 3, the tip 52m of the heat dissipating fin 52 is an end of the heat dissipating fin 52 that is farther from the base 51 than the base end 52n in a direction perpendicular to the surface 51a of the base 51.

[0024] The multiple heat dissipation fins 52 are lined up at predetermined intervals in a direction perpendicular to the rotation shaft 33 of the blower 30, for example, in the left-right direction. The extension directions of the multiple heat dissipation fins 52 from the base end 52n to the tip 52m are parallel to each other. Therefore, the interval (spatial gap dimension) between adjacent heat dissipation fins 52 is constant in the extension direction of the heat dissipation fins 52. Note that even if the extension directions of the multiple heat dissipation fins 52 are parallel to each other, the interval between adjacent heat dissipation fins 52 may gradually increase from the base end 52n toward the rotation shaft 33 due to a draft angle for convenience during manufacturing.

[0025] As shown in FIG. 3 and FIG. 4, when the extension direction of the heat dissipation fin 52 is determined based on the vertical direction and the rotation shaft 33 of the blower 30, the heat dissipation fin 52 is inclined toward the axial direction, which is the direction toward the rotation shaft 33, rather than the vertical direction. In the example of FIG. 4, the heat dissipation fin 52 is disposed above the rotation shaft 33 of the blower 30 in the up-down direction and to the right of the rotation shaft 33 in the left-right direction. In this case, the tip 52m of the heat dissipation fin 52 is disposed to the lower left of the base end 52n and to the upper right of the rotation shaft 33. The extension direction of the heat dissipation fin 52 from the base end 52n to the tip 52m is oriented between the vertical downward direction from the base end 52n and the axial direction from the base end 52n toward the rotation shaft 33. In addition, the extension direction of the heat dissipation fin 52 is inclined toward the vertical downward direction, being rotated clockwise around the base end 52n, rather than the vertical downward direction from the base end 52n, as viewed from the front.

[0026] In addition, when the extension direction of the heat dissipation fins 52 is determined based on the base 51 and the rotation shaft 33 of the blower 30, it is oriented between the orthogonal direction perpendicular to the surface 51a of the base 51 and the axial direction from the base end 52n toward the rotation shaft 33. In this case, the angle θ of the extension direction relative to the orthogonal direction is equal to or smaller than the angle θa of the axial direction relative to the orthogonal direction. This angle θ is an angle from the orthogonal direction to the extension direction clockwise around the base end 52n when viewed from the front, and is the smaller of the angles between the orthogonal direction and the extension direction. In addition, the angle θa is an angle from the orthogonal direction to the axial direction clockwise around the base end 52n when viewed from the front, and is the smaller of the angles between the orthogonal direction and the axial direction.

[0027] In addition, when the extension direction of the heat dissipating fin 52 is determined based on the blade 32 of the blower 30, it is directed between the tangential directions, which are the directions of extension of two tangents extending from the base end 52n to the outer circumferential circle 32a of the blade 32. The two tangents include a first tangent 32b passing through the base end 52n and the first tangent 32b1, and a second tangent 32c passing through the base end 52n and the second tangent 32c1. The tangential directions include a first tangential direction extending from the base end 52n to the first tangent 32b1 along the first tangent 32b, and a second tangential direction extending from the base end 52n to the second tangent 32c along the second tangent 32c. In this case, the extension direction of the heat dissipating fin 52 is directed between the first tangential direction and the second tangential direction.

[0028] Furthermore, when the extension direction of the heat dissipation fins 52 is determined based on the blades 32 and the rotating shaft 33 of the blower 30, the extension direction of one of the two tangents 32b, 32c extending from the base end 52n to the outer circumferential circle 32a of the blade 32 that forms a smaller angle with the orthogonal direction extends, and the axial direction from the base end 52n to the rotating shaft 33. In the example of Fig. 4, the angle θb between the first tangent 32b and the orthogonal direction is smaller than the angle θc between the second tangent 32c and the orthogonal direction.

[0029] This angle θb is an angle from the orthogonal direction to the first tangent direction in a counterclockwise direction around the base end 52n when viewed from the front, and is the smaller angle between the orthogonal direction and the first tangent direction. The angle θc is an angle from the orthogonal direction to the second tangent direction in a clockwise direction around the base end 52n when viewed from the front, and is the smaller angle between the orthogonal direction and the second tangent direction. In this case, the angle θ of the extension direction with respect to the orthogonal direction is equal to or greater than the angle θb of the first tangent direction with respect to the orthogonal direction. Note that, when viewed from the front, the angle θb in the clockwise direction around the base end 52n is a positive value, and the angle θb in the counterclockwise direction around the base end 52n is a negative value.

[0030] The plurality of heat dissipating fins 52 include, for example, a first heat dissipating fin 52a to a sixth heat dissipating fin 52f. The first heat dissipating fin 52a to the sixth heat dissipating fin 52f are lined up in this order from left to right in a space to the right of the rotation shaft 33 of the blower 30, and are spaced further from the rotation shaft 33 in the left-right direction in this order. For example, the fourth heat dissipating fin 52d is farther from the rotation shaft 33 than the first heat dissipating fin 52a and closer to the rotation shaft 33 than the sixth heat dissipating fin 52f in the left-right direction.

[0031] Therefore, the angle θa4 of the axial direction of the fourth heat dissipation fin 52d with respect to the orthogonal direction is larger than the angle θa1 of the axial direction of the first heat dissipation fin 52a with respect to the orthogonal direction, as shown in Figures 4 and 5. Also, the angle θa6 of the axial direction of the sixth heat dissipation fin 52f with respect to the orthogonal direction is larger than the angle θa4 of the axial direction of the fourth heat dissipation fin 52d with respect to the orthogonal direction, as shown in Figures 5 and 6. In this manner, the angle θa of the axial direction with respect to the orthogonal direction increases in the order of the first heat dissipation fin 52a to the sixth heat dissipation fin 52f.

[0032] Also, when viewed from the front, the angle θb in the clockwise direction around the base end 52n is a positive value, and the angle θb in the counterclockwise direction around the base end 52n is a negative value. In this case, as shown in FIG. 4, the angle θb1 (θb) of the first tangent direction of the first heat dissipation fin 52a with respect to the orthogonal direction is a negative value. Also, as shown in FIG. 6, the angle θb6 (θb) of the first tangent direction of the sixth heat dissipation fin 52f with respect to the orthogonal direction is a positive value. As shown in FIG. 5, the angle θb4 (θb) of the first tangent direction of the fourth heat dissipation fin 52d with respect to the orthogonal direction is 0 or a value closer to 0 than the angles θb1 and θb6. Therefore, the angle θb4 of the fourth heat dissipation fin 52d is larger than the angle θb1 of the first heat dissipation fin 52a, and the angle θb6 of the sixth heat dissipation fin 52f is larger than the angle θb4 of the fourth heat dissipation fin 52d. In this manner, the angle θb of the first tangent direction with respect to the orthogonal direction increases in the order of the first heat dissipating fin 52a to the sixth heat dissipating fin 52f.

[0033] Also, the angle θc4 of the second tangent direction of the fourth heat dissipation fin 52d with respect to the orthogonal direction is larger than the angle θc1 of the second tangent direction of the first heat dissipation fin 52a with respect to the orthogonal direction. Also, the angle θc6 of the second tangent direction of the sixth heat dissipation fin 52f with respect to the orthogonal direction is larger than the angle θc4 of the second tangent direction of the fourth heat dissipation fin 52d with respect to the orthogonal direction. Therefore, the angle θc of the second tangent direction with respect to the orthogonal direction increases in the order of the first heat dissipation fin 52a to the sixth heat dissipation fin 52f.

[0034] In this way, the angle θa of the axial direction relative to the orthogonal direction, the angle θb of the first tangent direction relative to the orthogonal direction, and the angle θc of the second tangent direction relative to the orthogonal direction are different for the first to sixth heat dissipation fins 52a to 52f. In contrast, since the first to sixth heat dissipation fins 52a to 52f are parallel to each other, the angle θ of the extension direction of the heat dissipation fins 52 relative to the orthogonal direction is equal for the first to sixth heat dissipation fins 52a to 52f.

[0035] Therefore, all of the angles θ1 to θ6 of the extension directions of the first to sixth heat dissipation fins 52a to 52f are equal to or smaller than the minimum angle θa1 among the axial angles θa1 to θa6 so that they are oriented between the orthogonal direction and the axial direction. All of the angles θ1 to θ6 of the extension directions of the first to sixth heat dissipation fins 52a to 52f are equal to or larger than the maximum angle θb6 among the first tangential angles θb1 to θb6 so that they are oriented between the first tangential direction and the second tangential direction, and are equal to or smaller than the minimum angle θc1 among the second tangential angles θc1 to θc6. All of the angles θ1 to θ6 of the extension directions of the first to sixth heat dissipation fins 52a to 52f are equal to or larger than the maximum angle θb6 among the first tangential angles θb1 to θb6 so that they are oriented between the first tangential direction and the axial direction, and are equal to or smaller than the minimum angle θa1 among the axial angles θa1 to θa6.

[0036] In this way, the multiple heat dissipating fins 52 are provided along the flow of air blown by the blower 30. That is, since air is blown by the blower 30 toward the outlet 12 in the sending chamber, the air flows from the intake 11 to the outlet 12 along the rotation shaft 33 of the blower 30. In contrast, since the base end 52n of the heat dissipating fin 52 extends along the rotation shaft 33, the heat dissipating fin 52 is along the air flow from the intake 11 to the outlet 12 in a direction parallel to the rotation shaft 33.

[0037] In addition, in the region of blower chamber 28 outside fan 30 when viewed along rotation axis 33, air is sucked in by fan 30 and flows toward rotation axis 33. In contrast, multiple heat dissipation fins 52 are parallel to each other and oriented so as to be inclined in the axial direction toward rotation axis 33 rather than the vertical direction, so that heat dissipation fins 52 are aligned with the flow of air sucked into fan 30 in a direction perpendicular to rotation axis 33.

[0038] In this way, since the multiple heat dissipation fins 52 are provided along the air flow caused by the blower 30, the air easily flows into the spaces between the heat dissipation fins 52 and also easily flows smoothly in the spaces between the heat dissipation fins 52. Therefore, the heat dissipation of the heat dissipation fins 52 is promoted by the air flow, and the heat dissipation efficiency of the heat sink 50 can be improved.

[0039] 1, the heat sink 50 is disposed in a corner region of the blower chamber 28 when viewed along the rotation axis 33 of the blower 30. The blower chamber 28 is rectangular and has four corner regions, for example, an upper right corner region 28a between the upper surface and the right surface, an upper left corner region 28b between the upper surface and the left surface, a lower right corner region 28c between the lower surface and the right surface, and a lower left corner region 28d between the lower surface and the left surface.

[0040] These upper, lower, right and left faces are wall faces surrounding the periphery of the blower chamber 28 when viewed along the rotation shaft 33 of the blower 30. The upper face is the lower face of the upper wall 23, the lower face is the upper face of the lower wall 24, the left face is the right face of the left wall 25, and the right face is the left face of the partition wall 27. The wall faces surrounding the periphery of the blower chamber 28 have a back face and a front face in addition to the upper, lower, right and left faces. As shown in FIG. 2, the back face is the front face of the rear wall 22, and the intake port 11 is provided. The front face is the rear face of the front wall 21, and the exhaust port 12 is provided.

[0041] As shown in FIG. 1, when viewed along the rotation axis 33 of the blower 30, the corner regions 28a to 28d are regions in the blower chamber 28 that extend from one wall surface 28e, which is closer to the heat sink 50 among the two wall surfaces of the blower chamber 28 in the left - right direction, toward the other wall surface by a predetermined dimension, and also extend from one wall surface 28f, which is closer to the heat sink 50 among the two wall surfaces of the blower chamber 28 in the up - down direction, toward the other wall surface by a predetermined dimension. In the example of FIG. 1, the upper - right corner region 28a is a region that extends from the right surface (one wall surface 28e) of the blower chamber 28 toward the left by a predetermined dimension and from the upper surface (one wall surface 28f) of the blower chamber 28 toward the bottom by a predetermined dimension. For example, the predetermined dimension in the left - right direction is equal to the dimension F1 between one wall surface 28e of the blower chamber 28 and the rotation axis 33, and the predetermined dimension in the up - down direction is equal to the dimension F2 between one wall surface 28f of the blower chamber 28 and the rotation axis 33.

[0042] In this case, the dimension E1 of the corner regions 28a to 28d in the left - right direction is smaller than the dimension F1 (E1 < F1), and the dimension E2 of the corner regions 28a to 28d in the up - down direction is smaller than the dimension F2 (E2 < F2). For this reason, the heat sink 50 is not arranged at the position P1 (directly above or directly below) that overlaps the rotation axis 33 when viewed along the up - down direction, and is not arranged at the position P2 that overlaps the rotation axis 33 when viewed along the left - right direction. In the example of FIG. 1, the left end of the heat sink 50 in the left - right direction is arranged to the right of the rotation axis 33 and its overlapping position P1, and the lower end of the heat sink 50 in the up - down direction is arranged above the rotation axis 33 and its overlapping position P2.

[0043] In such a blower chamber 28, when viewed along the rotation axis 33, in the region outside the outer peripheral circle 32a of the blades 32 of the blower 30, the air flow is faster in the corner regions 28a to 28d than at the overlapping positions P1 and P2 of the rotation axis 33. By arranging the heat sink 50 in such corner regions 28a to 28d where the air flow is fast, the heat dissipation of the heat dissipation fins 52 of the heat sink 50 is promoted, and the heat dissipation efficiency of the heat sink 50 can be improved.

[0044] Furthermore, the heat sink 50 is attached to the portion of the electrical box 40 that is disposed across the air blowing chamber 28 and the machine chamber 29, in the portion of the electrical box 40 that is in the air blowing chamber 28. In the air blown from the fan 30, the heat dissipation fins 52 of the heat sink 50 dissipate heat. For this reason, when the electrical box 40 is disposed across the air blowing chamber 28 and the machine chamber 29, the heat sink 50 including the heat dissipation fins 52 suppresses the temperature rise of the electrical box 40 and the electronic components 42 accommodated therein, compared to when the electrical box 40 is not disposed in the air blowing chamber 28 but is disposed in the machine chamber 29.

[0045] In the above embodiment, the heat sink 50 is disposed to the upper right of the rotation shaft 33 of the blower 30, but the arrangement is not limited thereto. The heat sink 50 is disposed according to the shape, position and number of the electrical equipment boxes 40. In the example of FIG. 7, the electrical equipment box 40 is divided into a plurality of (two) electrical equipment boxes 40, and a heat sink 50 is attached to each of the electrical equipment boxes 40. The upper heat sink 50 of the two heat sinks 50 is disposed with its heat dissipation fins 52 below the base 51, similar to the heat sink 50 in FIG. 3. In contrast, the lower heat sink 50 is disposed with its heat dissipation fins 52 to the left of the base 51.

[0046] The base end 52n of the heat dissipation fin 52 of the lower heat sink 50 also extends along the rotation shaft 33 of the blower 30. The heat dissipation fins 52 are arranged at predetermined intervals in a direction perpendicular to the rotation shaft 33 of the blower 30, for example, in the vertical direction, and are parallel to each other. The extension direction of the heat dissipation fin 52 is inclined toward the axial direction toward the rotation shaft 33 from the vertical direction, and is oriented between the vertical upward direction from the base end 52n and the axial direction from the base end 52n toward the rotation shaft 33. The extension direction of the heat dissipation fin 52 is inclined toward the axial direction toward the rotation shaft 33 from the horizontal direction, and is oriented between the horizontal leftward direction from the base end 52n and the axial direction from the base end 52n toward the rotation shaft 33 when viewed from the front.

[0047] Further, the extension direction of the heat dissipation fins 52 is oriented between an orthogonal direction perpendicular to the surface 51a of the base 51 and an axial direction from the base end 52n toward the rotation shaft 33. Further, the extension direction of the heat dissipation fins 52 is oriented between the directions of two tangents 32b, 32c extending from the base end 52n to the outer circumferential circle 32a of the blade 32.

[0048] Furthermore, the extension direction of the heat dissipation fin 52 is directed between the extension direction of the tangent 32b, 32c that forms a smaller angle with the orthogonal direction out of the two tangents 32b, 32c extending from the base end 52n to the outer circumferential circle 32a of the blade 32, and the axial direction from the base end 52n to the rotation shaft 33. In the lower heat sink 50 in the example of Fig. 7, the angle between the second tangent 32c and the orthogonal direction is smaller than the angle between the first tangent 32b and the orthogonal direction. In this case, the angle of the extension direction with respect to the orthogonal direction is equal to or larger than the angle of the second tangent direction of the second tangent 32c with respect to the orthogonal direction.

[0049] It should be noted that many improvements and other embodiments of the present disclosure will be apparent to those skilled in the art from the above description. Therefore, the above description should be construed as merely illustrative and is provided for the purpose of teaching those skilled in the art the best mode for carrying out the present disclosure. Details of the structure and / or function thereof may be substantially modified without departing from the spirit of the present disclosure.

[0050] (Additional Note) The above description of the embodiments discloses the following techniques. The first technology is an outdoor unit for an air conditioner comprising: a housing having an inlet and an outlet, a rotating shaft, and a blower having a plurality of blades connected to the rotating shaft and blowing air from the inlet to the outlet, and a heat sink having a plurality of plate-shaped heat dissipation fins for dissipating heat from electronic components, and a base to which the plurality of heat dissipation fins are connected, wherein the heat dissipation fins have a base end connected to the base and extending along the rotating shaft, and a tip end located away from the base, the extension direction from the base end to the tip end being parallel to each other for the plurality of heat dissipation fins, and are oriented so as to be inclined in a direction toward the rotating shaft rather than vertically.

[0051] According to this configuration, the base end of the heat dissipation fin extends along the rotation axis, so the heat dissipation fin follows the air flow from the intake port to the exhaust port of the blower. Also, since the multiple heat dissipation fins are parallel to each other and oriented at an angle toward the rotation axis rather than vertically, the heat dissipation fin follows the air flow sucked into the blower in the blowing chamber. In this way, since the multiple heat dissipation fins are arranged along the air flow by the blower, the heat dissipation of the heat dissipation fins is promoted by the air flow, and the heat dissipation efficiency of the heat sink can be improved.

[0052] The second technology is an outdoor unit of the air conditioner of the first technology, in which the extension direction of the heat dissipation fins is oriented between a perpendicular direction perpendicular to the base and a direction from the base end toward the rotation shaft.

[0053] With this configuration, when viewed along the rotation axis of the fan, air outside the fan in the blower chamber is drawn into the fan by the rotation of the blades around the rotation axis. The extension direction between the perpendicular direction and the direction toward the rotation axis is along the flow of the drawn air. Therefore, the heat dissipation of the heat dissipation fins is promoted by the air flow, and the heat dissipation efficiency of the heat sink can be improved.

[0054] A third technology is an outdoor unit of an air conditioner described in the first or second technology, in which the extension direction of the heat dissipation fin is directed between the extension directions of two tangents extending from the base end to the outer peripheral circle of the blade.

[0055] With this configuration, when viewed along the rotation axis of the fan, the air in the blower chamber outside the fan is drawn into the fan by the rotation of the blades around the rotation axis. The extension direction between the directions of the two tangents to the outer circumference of the blades is along the flow of the drawn air. Therefore, the heat dissipation of the heat dissipation fins is promoted by the air flow, and the heat dissipation efficiency of the heat sink can be improved.

[0056] A fourth technology is an outdoor unit of an air conditioner according to any one of the first to third technologies, in which the extension direction of the heat dissipation fin is directed between the extension direction of the tangent line that forms a smaller angle with a perpendicular direction perpendicular to the base, of two tangent lines extending from the base end to the outer peripheral circle of the blade, and the direction from the base end toward the rotation shaft.

[0057] With this configuration, when viewed along the rotation axis of the fan, the air in the blower chamber outside the fan is drawn into the fan by the rotation of the blades around the rotation axis. The extension direction between the direction of the tangent to the outer circumference of the blade and the direction toward the rotation axis is aligned with the flow of the drawn air. Therefore, the heat dissipation of the heat dissipation fins is promoted by the air flow, and the heat dissipation efficiency of the heat sink can be improved.

[0058] A fifth technology is an outdoor unit of an air conditioner according to any one of the first to fourth technologies, wherein the housing has an air chamber in which the blower is arranged, and the heat sink is arranged in a corner region of the air chamber when viewed along the rotation axis of the blower.

[0059] With this configuration, the air flows faster in the corner areas of the blower chamber when viewed along the axis of rotation than in other areas, so that the faster air flow promotes heat dissipation from the heat dissipation fins, improving the heat dissipation efficiency of the heat sink.

[0060] A sixth technology is an outdoor unit of an air conditioner according to the fifth technology, further comprising an electrical equipment box that houses the electronic components, the housing having an air blower chamber in which the blower is arranged and a machine room separated from the air blower chamber, and the electrical equipment box being arranged across the air blower chamber and the machine room.

[0061] According to this configuration, the electrical box is provided across the air blowing chamber and the machine room, and a heat sink is attached to the portion of the electrical box provided in the air blowing chamber. The heat dissipation of the heat sink's heat dissipation fins is promoted by the air flow in the air blowing chamber. Therefore, when the electrical box is provided across the air blowing chamber and the machine room, the electrical box dissipates heat more efficiently and the temperature rise of the electronic components in the electrical box is suppressed compared to when the electrical box is provided in the machine room and not in the air blowing chamber. [Explanation of symbols]

[0062] 10:Outdoor unit 11: Intake port 12: Air outlet 20: Housing 28:Blower room 29: Machine room 30: Blower 32: Feather 32a:Circumference circle 32b: tangent 32c: tangent 33: Rotation axis 40: Electrical box 42: Electronic parts 50: Heat sink 51: Bass 52: Heat dissipation fin 52m: Tip 52n: proximal end

Claims

1. A housing having an inlet and an outlet; a blower having a rotating shaft and a plurality of blades connected to the rotating shaft, the blower blowing air from the intake port to the exhaust port; a heat sink having a plurality of plate-shaped heat dissipation fins for dissipating heat from an electronic component and a base to which the plurality of heat dissipation fins are connected; Equipped with The heat dissipation fins have a base end connected to the base and extending along the rotation axis, and a tip end located away from the base, and the extension directions from the base end to the tip end are parallel to each other among the multiple heat dissipation fins, and are oriented so as to be inclined toward the rotation axis rather than vertically. Air conditioner outdoor unit.

2. The extension direction of the heat dissipation fins is oriented between a direction perpendicular to the base and a direction from the base end toward the rotation shaft. An outdoor unit for an air conditioner according to claim 1.

3. The extension direction of the heat dissipation fin is directed between the extension directions of two tangents extending from the base end to the outer circumferential circle of the blade. An outdoor unit for an air conditioner according to claim 1.

4. the extending direction of the heat dissipating fin is oriented between a direction in which one of two tangents extending from the base end to the outer circumferential circle of the blade that forms a smaller angle with a direction perpendicular to the base, and a direction from the base end toward the rotation shaft. An outdoor unit for an air conditioner according to claim 1.

5. the housing has an air blowing chamber in which the air blower is disposed, The heat sink is disposed in a corner region of the blower chamber as viewed along the rotation axis of the blower. An outdoor unit for an air conditioner according to any one of claims 1 to 4.

6. Further comprising an electrical box for accommodating the electronic components, The housing has an air blowing chamber in which the air blower is disposed and a machine chamber separated from the air blowing chamber, The electrical equipment box is disposed across the ventilation chamber and the machine chamber. An outdoor unit for an air conditioner according to claim 5.

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