JP2021014938A - Outdoor unit for refrigeration cycle device - Google Patents

Abstract

To provide an outdoor unit for a refrigeration cycle device improving cooling efficiency of power supply semiconductor elements of a compressor control circuit plate and preventing damage on the power supply semiconductor elements and/or degradation in electrical characteristics.SOLUTION: An indoor unit 1 for a refrigeration cycle device includes: a heat exchanger 5 heat-exchanging air and refrigerant; a blower 13 blowing air passing through the heat exchanger 5 to the outside of a housing 12; a compressor 6 compressing and discharging the refrigerant; a compressor control circuit plate 35 on which a plurality of power supply semiconductor elements 51 driving and controlling the compressor 6; and a first heat sink 55 thermally contact to the plurality of power supply semiconductor elements 51 to cool the plurality of power supply semiconductor elements 51. The first heat sink 55 extends along an air current flowing in the housing 12 and has a plurality of fins 61 arranged in a direction intersecting the air current. The plurality of power supply semiconductor elements 51 are arranged in a line in a direction where the plurality of fins 61 are arranged.SELECTED DRAWING: Figure 5

Description

An embodiment of the present invention relates to an outdoor unit of a refrigeration cycle device.

The outdoor unit of the refrigeration cycle device, which includes a plurality of blowers arranged one above the other, a plurality of inverter boards for blowers for driving the blowers, and an electrical component unit H for accommodating a plurality of inverter boards for blowers, is known. Has been done. A plurality of inverter boards for blowers are arranged one above the other.

JP-A-2015-187506

The outdoor unit of the refrigeration cycle device includes a compressor that compresses the refrigerant and a compressor control circuit board that drives and controls the compressor. A plurality of semiconductor elements for power supply are mounted on the compressor control circuit board. In general, since the electric motor that drives the compressor has a larger output than the electric motor of the blower, the power supply semiconductor element of these compressor control circuit boards has a larger heat generation amount than the power supply semiconductor element of the blower control circuit board.

Further, in the outdoor unit of the conventional refrigeration cycle device, there is room for improvement in the structure for cooling the semiconductor element for power supply of the compressor control circuit board.

Therefore, the present invention is an outdoor unit of a refrigeration cycle apparatus capable of improving the cooling efficiency of the semiconductor element for power supply of the compressor control circuit board to prevent damage to the semiconductor element for power supply and deterioration of electrical characteristics. The purpose is to provide.

The outdoor unit of the refrigeration cycle apparatus according to the embodiment of the present invention is a heat exchanger arranged inside the housing and exchanging heat between air and a refrigerant flowing inside, and from the outside of the housing. The heat is sucked in, the air sucked into the housing is passed through the heat exchanger, and the heat exchanged air is blown out to the outside of the housing by compressing and discharging the refrigerant. A compressor distributed in an exchanger, a circuit board on which a plurality of power supply semiconductor elements for driving and controlling the compressor are mounted, and the plurality of power supply semiconductor elements in thermal contact with the plurality of power supply semiconductor elements. The heat sink comprises a plurality of fins extending along the flow of the air flowing in the housing and lining up in a direction intersecting the flow of the air, and the plurality of power supplies. The semiconductor elements for use are arranged in a line in the direction in which the plurality of fins are arranged, or are arranged in a grid pattern in a direction in which the plurality of fins are arranged rather than in a direction in which the plurality of fins are extended.

The perspective view of the outdoor unit of the refrigeration cycle apparatus which concerns on embodiment of this invention. The front view of the outdoor unit of the refrigeration cycle apparatus which concerns on embodiment of this invention. The perspective view which shows the electric component box and the control device housed in the outdoor unit which concerns on embodiment of this invention. The perspective view which shows the electric component box and the control device housed in the outdoor unit which concerns on embodiment of this invention. The conceptual diagram which shows the arrangement relation of the 1st heat sink of the outdoor unit which concerns on embodiment of this invention, and the semiconductor element for a power source. The cross-sectional view of the second part box of the outdoor unit which concerns on embodiment of this invention.

An embodiment of the outdoor unit of the refrigeration cycle apparatus according to the present invention will be described with reference to FIGS. 1 to 6. In the plurality of drawings, the same or corresponding configurations are designated by the same reference numerals.

FIG. 1 is a perspective view of an outdoor unit of a refrigeration cycle device according to an embodiment of the present invention.

FIG. 2 is a front view of the outdoor unit of the refrigeration cycle device according to the embodiment of the present invention.

The refrigeration cycle device includes a heat exchanger 5 on the heat source side, a compressor 6, a heat exchanger on the user side (not shown), an expansion valve (not shown), and a refrigerant pipe (not shown) for circulating refrigerant through these devices. It includes a refrigeration cycle (not shown) and a refrigeration cycle (not shown). The refrigeration cycle may include a four-way valve (not shown) that switches between a cooling operation and a heating operation of the refrigeration cycle apparatus.

In the present embodiment, the outdoor unit 1 of the refrigeration cycle apparatus accommodates a heat exchanger 5, a compressor 6, an expansion valve, a four-way valve, and a part of a refrigerant pipe on the heat source side of the refrigeration cycle.

Further, as shown in FIG. 1, the outdoor unit 1 has a housing 12 having an air intake port (not shown) and an air outlet 11 and a refrigerant arranged in the housing 12 and flowing through the air and the inside. Air is sucked from the outside of the housing 12 and the heat exchanger 5 that exchanges heat with each other, the air sucked into the housing 12 is passed through the heat exchanger 5, and the heat exchanged air is sent to the outside of the housing 12. A blower 13 that blows out, a compressor 6 that compresses and discharges the refrigerant and distributes it to the heat exchanger 5, a control device 15 that controls the operation of the refrigeration cycle device, and an electrical component box 16 that houses the control device 15. It has.

The heat exchanger 5, the blower 13, the compressor 6, the four-way valve, and the electric component box 16 are housed in the housing 12.

The outdoor unit 1 according to the present embodiment has a plurality of, for example, three air outlets 11 arranged in the vertical direction in the installed state. A blower 13 is provided for each air outlet 11. Further, the heat exchanger 5 is arranged on the suction side of the blower 13 for each blower 13. That is, the outdoor unit 1 according to the present embodiment includes one housing 12 having three air outlets 11, and a blower 13 and a heat exchanger 5 corresponding to the respective air outlets 11.

The housing 12 has a rectangular parallelepiped shape. The housing 12 includes a bottom plate (not shown), a left side plate 21 covering the left side surface, a right side plate 22 covering the right side surface, a front plate 23 covering the front surface, and fingers (not shown) provided on the back surface. It includes a top plate 24 that covers the top surface.

In FIG. 2, a part of the front plate 23 is opened so that the heat exchanger 5, the blower 13, and the electric component box 16 in the housing 12 can see the housing 12.

The air outlet 11 is provided on the front surface of the housing 12, that is, on the front plate 23 among the side surfaces of the housing 12. A fan guard 26 is provided at the air outlet 11. The fan guard 26 covers the blower 13.

The air intake is provided from the back surface to the left side surface of the housing 12 among the side surfaces of the housing 12. Fingered air intakes are provided. The fingered is a grid that protects the heat exchanger 5.

The inside of the housing 12 is divided into two in the left-right direction of the housing 12. One is a heat exchange chamber 28 in which the blower 13 and the heat exchanger 5 are housed. The other is the machine room 29, which houses the compressor 6, the expansion valve, the four-way valve, and the electrical component box 16.

When the blower 13 is rotationally driven, the air outside the housing 12 is sucked into the housing 12 from the air intake of the housing 12. The air sucked into the housing 12 exchanges heat with the refrigerant flowing through the heat exchanger 5 at the heat exchanger 5. The air that has exchanged heat with the heat exchanger 5 is blown out of the housing 12 from the air outlet 11 by the blower 13.

The outdoor unit 1 may be a single-stage type having one air outlet 11 or a multi-stage type having two or four or more air outlets 11.

Next, the electric component box 16 will be described in detail.

3 and 4 are perspective views showing an electric component box and a control device housed in the outdoor unit according to the embodiment of the present invention.

FIG. 3 is a view of the electric component box 16 as viewed from the heat exchange chamber 28 side. FIG. 4 is a view of the electric component box 16 as viewed from the machine room 29 side.

As shown in FIGS. 3 and 4 in addition to FIG. 2, the electric component box 16 of the outdoor unit 1 according to the present embodiment has two major parts. The first part is the first parts box 31 that houses the main circuit board that comprehensively controls the operation of the refrigeration cycle apparatus. The second portion is a second parts box 37 that houses a compressor control circuit board 35 that controls the operation of the compressor 6 and a blower control circuit board 36 that controls the operation of the blower 13. The first parts box 31 and the second parts box 37 are sheet metal processed products.

In FIG. 4, the second parts box 37 is opened to the machine room 29 by omitting the illustration of the lid, but in the actual mounting state, the second parts box 37 is closed by the lid.

The second component box 37 is a rectangular parallelepiped box body that is large in the height direction and the depth direction of the housing 12 and is flat in the width direction (left-right direction) of the housing 12. The second parts box 37 includes a flat plate portion 41 that serves all or part of the wall that divides the inside of the housing 12 into two spaces, the heat exchange chamber 28 and the machine chamber 29.

One surface 41a of the flat plate portion 41 faces the heat exchange chamber 28. The other surface 41b of the flat plate portion 41 is part or all of the wall that partitions the machine room 29. A compressor control circuit board 35 and a blower control circuit board 36 are provided on the other surface 41b of the flat plate portion 41.

The compressor control circuit board 35 and the blower control circuit board 36 are arranged in the vertical direction of the second component box 37. A first blower control circuit plate 45 for controlling the upper two blowers 13 of the housing 12 is provided above the flat plate portion 41. A second blower control circuit plate 46 for controlling one blower 13 at the lower part of the housing 12 is provided below the flat plate portion 41. A compressor control circuit plate 35 is provided in the center of the flat plate portion 41. The compressor control circuit board 35 is arranged between the first blower control circuit board 45 and the second blower control circuit board 46.

A control circuit for driving and controlling the electric motor of the compressor 6, for example, an inverter circuit, is mounted on the compressor control circuit board 35. This inverter circuit includes a plurality of power supply semiconductor elements 51, for example, an insulated gate bipolar transistor (IGBT) and a freewheeling diode (FWD).

In FIG. 4, the range in which the plurality of power supply semiconductor elements 51 are arranged is shown by a broken line. The range of the broken line is configured as a module 52 having a plurality of semiconductor elements 51 for power supply, for example, an intelligent power module (IPM) and a rectifier (Rrectifire).

A control circuit for driving and controlling the electric motor of the blower 13, for example, an inverter circuit is mounted on the blower control circuit board 36. This inverter circuit includes a plurality of semiconductor elements for power supply (not shown), for example, an Intelligent Power Module (IPM), an Insulated Gate Bipolar Transistor (IGBT), a freewheeling diode (EWD), and the like. It has a rectifier (Rrectifire). Two inverter circuits are mounted on the first blower control circuit board 45 corresponding to the two blowers 13. On the second blower control circuit board 46, one inverter circuit is mounted corresponding to one blower 13.

The semiconductor element for power supply generates heat as it operates. Therefore, the electric component box 16 includes a first heat sink 55 that cools the power supply semiconductor element 51 of the compressor control circuit board 35, and a second heat sink 56 that cools the power supply semiconductor element of the blower control circuit board 36. ing. The first heat sink 55 and the second heat sink 56 are molded products of an aluminum alloy.

By the way, in general, the electric motor of the compressor 6 consumes a larger amount of electric power than the electric motor of the blower 13. Therefore, the power supply semiconductor element 51 of the compressor control circuit board 35 generates a larger amount of heat than the power supply semiconductor element of the blower control circuit board 36.

Therefore, the second heat sink 56 for cooling the blower control circuit board 36 is a so-called on-board heat sink provided on the blower control circuit board 36. The power supply semiconductor element of the blower control circuit board 36 can be sufficiently cooled by a small on-board heat sink. The second heat sink 56 cools the power semiconductor element of the blower control circuit board 36 by the air flowing from the machine room 29 into the second component box 37.

On the other hand, the first heat sink 55 for cooling the compressor control circuit board 35 is provided on one surface 41a of the flat plate portion 41 of the second component box 37. The first heat sink 55 is larger than the second heat sink 56, and has the same size (spread on the surface 41a) as the compressor control circuit board 35. The first heat sink 55 and the semiconductor element for power supply of the compressor control circuit board 35 may be thermally connected. That is, the first heat sink 55 and the semiconductor element for power supply of the compressor control circuit board 35 may be in direct contact with each other through an opening (not shown) provided in the flat plate portion 41 of the second component box 37. The flat plate portion 41 of the parts box 37 may be sandwiched between them and thermally connected via the flat plate portion 41.

The first heat sink 55 cools the power semiconductor element 51 of the compressor control circuit board 35 by the air flowing in the heat exchange chamber 28. The flow velocity of the air in the heat exchange chamber 28 in which the blower 13 is arranged is faster than the flow velocity of the air in the machine chamber 29. Therefore, the first heat sink 55 is more likely to be cooled than the second heat sink 56.

Further, the first heat sink 55 includes a plurality of fins 61 protruding into the heat exchange chamber 28 from the surface 41a of the flat plate portion 41 of the second parts box 37. The plurality of fins 61 extend along the flow f of the air flowing in the housing 12 (solid arrow E). The plurality of fins 61 are arranged in a direction intersecting the air flow f (solid arrow L). The plurality of fins 61 are arranged in a comb shape. The base of each fin 61 is connected to a plate-shaped base. Therefore, the first heat sink 55 can be easily extruded in the extending direction of the fin 61.

The arrow indicating the air flow f is shown from the upstream to the downstream of the air flow.

The plurality of fins 61 have a plurality of portions having different protrusion heights along the air flow f. The portion having a high protrusion height is arranged on the upstream side of the portion having a low protrusion height in the air flow f. That is, the portion having a low protrusion height is arranged on the downstream side of the portion having a high protrusion height in the air flow f. In other words, the height of the plurality of fins 61 is higher in the upstream portion 63 than in the downstream portion 62 in the air flow f.

The power semiconductor element of the compressor control circuit board 35 is thermally connected to the first heat sink 55 at the upstream portion 63 of the plurality of fins 61 having a higher protruding height. When viewed from the protruding directions of the plurality of fins 61, the power supply semiconductor element of the blower control circuit board 36 is arranged inside the region occupied by the upstream side portion 63.

FIG. 5 is a conceptual diagram showing the arrangement relationship between the first heat sink of the outdoor unit and the semiconductor element for power supply according to the embodiment of the present invention.

As shown in FIG. 5, when a plurality of power supply semiconductor elements 51 of the compressor control circuit board 35 are arranged in a row, the plurality of power supply semiconductor elements 51 are arranged in the direction in which the plurality of fins 61 are arranged (solid arrow). They are arranged in a row to L) and mounted on the compressor control circuit board 35. In other words, the plurality of power supply semiconductor elements 51 are arranged in a row in a direction intersecting the extending directions of the plurality of fins 61 and mounted on the compressor control circuit board 35. It is preferable that the plurality of semiconductor elements 51 for power supply are arranged in a line in a direction orthogonal to the extending direction of the plurality of fins 61.

Further, when a plurality of power supply semiconductor elements 51 of the compressor control circuit board 35 are arranged in a plurality of rows and a plurality of columns, that is, in a grid pattern, the plurality of power supply semiconductor elements 51 are arranged in a direction in which the plurality of fins 61 extend. A large number of fins 61 are arranged in a grid pattern in the direction in which the plurality of fins 61 are arranged (solid arrow L) rather than the solid line arrow E), and are mounted on the compressor control circuit board 35. In other words, the number of power supply semiconductor elements 51 arranged in the direction in which the plurality of fins 61 are arranged is larger than the number of power supply semiconductor elements 51 arranged in the direction in which the plurality of fins 61 extend. As shown in FIG. 6, when arranging in a grid pattern of 2 rows and 3 columns, the plurality of power supply semiconductor elements 51 are aligned in the direction in which the plurality of fins 61 extend, and in the direction in which the plurality of fins 61 are arranged. They are lined up along the line. That is, the three power supply semiconductor elements 51 are arranged in the direction in which the plurality of fins 61 are arranged, and the two power supply semiconductor elements 51 are arranged in the direction in which the plurality of fins 61 extend.

The arrangement of the plurality of power supply semiconductor elements 51 as shown in FIG. 5 is located inside the region occupied by the upstream side portion 63 when viewed from the protruding directions of the plurality of fins 61.

FIG. 6 is a cross-sectional view of the second parts box of the outdoor unit according to the embodiment of the present invention in the VI-VI line of FIG.

As shown in FIG. 6, the second component box 37 of the outdoor unit 1 according to the present embodiment functions as a ventilation path for air that directly cools the blower control circuit board 36 and the compressor control circuit board 35.

In the second parts box 37, the air in the machine room 29 is circulated to the heat exchange chamber 28 by the suction pressure generated by the blower 13 in the housing 12, and the blower control circuit board 36 and the compressor control circuit board 35 are directly connected to each other. Cool down.

The lid portion 65 of the second parts box 37 is provided with a suction port 66 for allowing air to flow from the machine room 29 into the second parts box 37. The suction port 66 is a plurality of holes provided in a part of the compressor control circuit plate 35 and the lid portion 65 facing the second blower control circuit plate 46 arranged below. That is, the lid portion 65 is a so-called punching metal.

The flat plate portion 41 of the second parts box 37 is provided with an outlet 67 for allowing air to flow out from the inside of the second parts box 37 to the heat exchange chamber 28. The air outlet 67 is a plurality of gaps provided in a part of the flat plate portion 41 facing the first blower control circuit plate 45 arranged above. A louver-shaped wind direction plate is provided in each of the gaps. This wind direction plate is a part of the flat plate portion 41 that is bent when forming a gap in the flat plate portion 41.

By the way, the suction port 66 of the second parts box 37 is provided in the lid portion 65, and the outlet 67 of the second parts box 37 is provided in the flat plate portion 41. Therefore, the air flowing from the suction port 66 into the second parts box 37 is directly blown onto the compressor control circuit board 35 and the second blower control circuit board 46 and heads toward the outlet 67. This air flow reliably cools the compressor control circuit board 35 and the second blower control circuit board 46.

However, the air blown on the compressor control circuit board 35 and the second blower control circuit board 46 tends to flow out to the outlet 67 through the gap between the first blower control circuit board 45 and the flat plate portion 41. There is a risk that the cooling of the blower control circuit plate 45 will be insufficient.

Therefore, the second parts box 37 has an in-box wind direction protruding from the flat plate portion 41 having the air outlet 67 on the upstream side of the first blower control circuit plate 45 that covers the air outlet 67, that is, on the side closer to the suction port 66. It is equipped with a plate 68.

The in-box wind direction plate 68 is wider than the first blower control circuit plate 45 and more than the first blower control circuit plate 45 so that the gap between the first blower control circuit plate 45 and the flat plate portion 41 can be reliably closed. Also preferably protrudes from the flat plate portion 41. As shown by the wind direction arrow A in FIG. 6, the air direction plate 68 in the box directs the air flow toward the gap between the first blower control circuit plate 45 and the flat plate portion 41 on the front side of the first blower control circuit plate 45 ( The surface facing the flat plate portion 41 is the back surface, and the surface not facing the flat plate portion 41 is the front surface) to promote cooling of the first blower control circuit plate 45.

The air flowing in the second component box 37 in this way cools the power semiconductor element of the blower control circuit board 36 through the second heat sink 56. Therefore, the second heat sink 56 includes a plurality of fins 71 projecting into the second parts box 37. The plurality of fins 71 extend along the flow of air flowing in the second parts box 37. The plurality of fins 71 are arranged in a direction intersecting the air flow. The plurality of fins 71 are arranged in a comb shape. The base of each fin 61 is connected to a plate-shaped base.

Then, as shown in FIGS. 2 and 6, the downstream portion 62 (solid arrow H2) of the first heat sink 55 having a low protruding height of the fin 61 is close to the outer edge 73 of the propeller fan 72 of the blower 13. .. As shown in FIG. 6, when the first heat sink 55 is viewed from the direction of the rotation center line of the blower 13, the outer edge 73 of the propeller fan 72 has a high protrusion height of the fin 61 (solid arrow H1) and is upstream of the first heat sink 55. It overlaps the side portion 63. That is, the first heat sink 55 is arranged so that the downstream portion 62 where the protruding height of the fin 61 is low is close to the outer peripheral edge of the propeller fan 72. The power supply semiconductor element 51 of the compressor control circuit board 35 is arranged at a portion closest to the propeller fan 72 in the direction of the rotation center line of the blower 13. That is, when viewed in the direction of the air flow for cooling the first heat sink 55, the power supply semiconductor element 51 of the compressor control circuit board 35 is located at the portion 62a closest to the propeller fan 72 among the downstream portions 62 of the fin 61. It overlaps the part where it is placed.

As described above, the outdoor unit 1 according to the present embodiment includes the compressor control circuit board 35 on which a plurality of power supply semiconductor elements 51 for driving and controlling the compressor 6 are mounted, and the air flowing in the housing 12. It comprises a first heat sink 55 having a plurality of fins 61 extending along the flow and lining up in a direction intersecting the flow of air. The plurality of semiconductor elements 51 for power supply are arranged in a line in the direction in which the plurality of fins 61 are arranged, or are arranged in a grid pattern in a direction in which the plurality of fins 61 are arranged rather than in a direction in which the plurality of fins 61 extend. Therefore, the outdoor unit 1 can reduce the thermal influence between the plurality of power supply semiconductor elements 51 and improve the cooling efficiency of each power supply semiconductor element 51.

Further, the outdoor unit 1 according to the present embodiment has a plurality of fins 61 in which the upstream side portion 63 is higher than the downstream side portion 62 in the air flow. The plurality of power supply semiconductor elements 51 are in contact with the first heat sink 55 at the upstream side portion 63. Therefore, the outdoor unit 1 can further improve the cooling efficiency of each power supply semiconductor element 51.

Further, the downstream portion 62 of the outdoor unit 1 according to the present embodiment faces the impeller of the blower 13, and the plurality of semiconductor elements 51 for power supply are located closest to the impeller in the direction of the rotation center line of the blower 13. Have been placed. Therefore, the outdoor unit 1 can further improve the cooling efficiency of each power supply semiconductor element 51.

Therefore, according to the outdoor unit 1 according to the present embodiment, the cooling efficiency of the power supply semiconductor element 51 of the compressor control circuit board 35 is improved, and the power supply semiconductor element 51 is damaged or the electrical characteristics are deteriorated. Can be prevented.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Outdoor unit, 5 ... Heat exchanger, 6 ... Compressor, 11 ... Air outlet, 12 ... Housing, 13 ... Blower, 15 ... Control device, 16 ... Electrical component box, 21 ... Left plate, 22 ... Right side Plate, 23 ... Front plate, 24 ... Top plate, 26 ... Fan guard, 28 ... Heat exchange room, 29 ... Machine room, 31 ... First parts box, 35 ... Compressor control circuit board, 36 ... Blower control circuit board, 37 ... Second component box, 41 ... Flat plate, 41a ... Heat exchange chamber side surface of flat plate, 41b ... Machine room side surface of flat plate, 45 ... First blower control circuit board, 46 ... Second blower control Circuit board, 51 ... Semiconductor element for power supply, 52 ... Module, 55 ... First heat sink, 56 ... Second heat sink, 61 ... Fin, 62 ... Downstream part, 62a ... Downstream part of fin, closest to propeller fan Parts, 63 ... upstream parts, 65 ... lids, 66 ... suction ports, 67 ... air outlets, 68 ... box heat sinks, 71 ... fins, 72 ... propeller fans, 73 ... outer edges.

Claims (3)

With the housing
A heat exchanger, which is arranged in the housing and exchanges heat between air and a refrigerant flowing inside.
A blower that sucks the air from the outside of the housing, passes the air sucked into the housing through the heat exchanger, and blows out the heat-exchanged air to the outside of the housing.
A compressor that compresses and discharges the refrigerant and distributes it to the heat exchanger.
A circuit board on which a plurality of semiconductor elements for power supply that drive and control the compressor are mounted, and
A heat sink that is thermally contacted with the plurality of power supply semiconductor elements to cool the plurality of power supply semiconductor elements is provided.
The heat sink has a plurality of fins that extend along the flow of air flowing in the housing and are aligned in a direction intersecting the flow of air.
The plurality of semiconductor elements for power supply are arranged in a row in the direction in which the plurality of fins are arranged, or a large number of the plurality of fins are arranged in a direction in which the plurality of fins are arranged rather than in a direction in which the plurality of fins are arranged. Machine. The height of the plurality of fins is higher in the upstream portion than in the downstream portion in the air flow.
The outdoor unit of the refrigeration cycle apparatus according to claim 1, wherein the plurality of semiconductor elements for power supply are in contact with the heat sink at the upstream portion. The downstream part faces the impeller of the blower.
The outdoor unit of the refrigeration cycle apparatus according to claim 2, wherein the plurality of semiconductor elements for power supply are arranged at a portion closest to the impeller in the direction of the rotation center line of the blower.

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