JP6818558B2 - Outdoor unit of air conditioner - Google Patents

Description

The present invention relates to an outdoor unit of an air conditioner, and particularly to cooling of heat generating parts.

Japanese Patent Application Laid-Open No. 2003-243586 (Patent Document 1) is available as a background technique in the technical field relating to a heat sink for cooling heat-generating components. Patent Document 1 states, "In an air-cooled heat sink provided with a plurality of fins on one surface of a component mounting base on which a heat-generating component is mounted and a fan for sending cooling air between the fins along the component mounting base surface. A cooling air guide body for deflecting the flow of the cooling air toward the component mounting base is provided between the fins. The cooling air guide body has a length over substantially the entire length of the fin in the flow direction of the cooling air. , The distance A between the tip of the cooling air inlet side and the base is inclined so as to be larger than the distance B between the end on the cooling air outlet side and the base. " There is.

Japanese Unexamined Patent Publication No. 2003-243586

Patent Document 1 describes an air-cooled heat sink provided with a fan. However, the air-cooled heat sink provided with the fan described in Patent Document 1 has problems of space for installing the fan and cost increase as a product. Further, in recent years, heat sinks that suppress heat generation of electrical components used for controlling air conditioners have been desired to increase the number of fins and narrow the pitch between fins in order to improve heat dissipation performance. If the structure is adopted, there is a problem that it becomes difficult for the wind to pass between the fins due to the separation of the wind passing between the fins. In addition, two or more heat-generating power modules may be used on the control board, and two or more heat sinks may be mounted according to the power module, but two heat sinks are installed in the direction of the wind flow. When arranged above, the heat sink on the upstream side separates the wind and the temperature of the wind rises, the air volume and speed passing through the heat sink on the downstream side decrease, and the air temperature rises, causing the heat dissipation performance of the heat sink. Will be reduced.

An object of the present invention is to provide an air conditioner in which a fan or the like is not newly provided, the air volume and speed passing through the heat sink are increased, and the heat dissipation performance of the heat sink can be improved without deteriorating the performance of the air conditioner. It is to provide an outdoor unit.

In view of the above background technology and problems, the present invention is, for example, an outdoor unit of an air conditioner, which is a compressor that compresses and discharges a refrigerant, and a compressor that is connected to and discharged from the compressor. A heat exchanger that exchanges heat, a blower that takes in air from the outside to the inside and discharges it to the outside or upward through the heat exchanger, a shroud with a bell mouth shape, a control board, and heat of electrical components mounted on the control board. It has an electrical component unit, which has an electrical component casing with a heat sink to allow the heat sink to escape, and when the heat sink is viewed from above, the outer circumference of the bellmouth-shaped part of the shroud with a large opening area and the part with a narrow opening area. The configuration is arranged between the circumference and the circumference.

According to the present invention, it is possible to improve the air volume and the wind speed passing through the heat sink without newly providing an air cooling fan or the like, and as a result, the heat dissipation performance of the heat sink can be improved.

It is a schematic vertical sectional view seen from the front of the outdoor unit of the air conditioner in Example 1. It is a schematic top view of the outdoor unit of the air conditioner in Example 1. FIG. It is sectional drawing around the electrical component unit of the outdoor unit of the air conditioner in Example 1. FIG. It is a schematic block diagram of the wind focusing member in Example 1. FIG. It is a vertical sectional view around the electrical component unit of the outdoor unit of the air conditioner in Example 1. FIG. It is a schematic vertical sectional view seen from the front of the outdoor unit of the air conditioner in Example 2. FIG. It is a vertical sectional view around the electrical component unit of the outdoor unit of the air conditioner in Example 2. FIG.

Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic vertical cross-sectional view of the outdoor unit of the air conditioner in this embodiment as viewed from the front. Further, FIG. 2 is a schematic top view of the outdoor unit of the air conditioner in this embodiment.

In FIG. 1, the outdoor unit 1 of the air conditioner includes a heat exchanger 2, a compressor 3, a blower 4, an electrical component unit 5, a wind focusing member 6, a heat sink 7, and a resin shroud 10. Be prepared.

The resin shroud 10 has a bell mouth shape in which the opening area above the blower 4 is narrow and the opening area below the blower 4 and on the 9 side inside the outdoor unit is wide.

The electrical component unit 5 includes an electrical component, an electrical component casing 8 for accommodating the electrical component, a heat sink 7 exposed inside the outdoor unit 9 to release heat of the electrical component, and a wind focusing member 6. The heat sink 7 and the wind focusing member 6 are originally fixed to the back surface of the electric component casing 8 when viewed from the front, so they cannot be seen, but they are shown for reference. Further, as shown in FIG. 2, the heat sink 7 is arranged on the inner peripheral side of the outer peripheral 24 of the bell mouth-shaped portion of the shroud 10 having a wide opening area when viewed from the upper surface.

The wind focusing member 6 covers the heat sink 7 in the outdoor unit 9 so that a part of the air flowing from the heat exchanger 2 side to the blower 4 side flows in the outdoor unit 9. Further, the wind focusing member 6 has a structure in which the opening area is wide below the outdoor unit 1 and the opening area is narrow above the outdoor unit 1.

The heat exchanger 2 has a concavely bent shape in FIG. 2, and is arranged along the heat exchanger left suction surface 21 of the outdoor unit 1, the heat exchanger right suction surface 22, and the heat exchanger rear suction surface 23. Has been done.

The compressor 3 is connected to the heat exchanger 2 and is a device that compresses and discharges the refrigerant, and is arranged in the outdoor unit 9.

The blower 4 is a device that discharges the air taken into the outdoor unit 9 from the outside through the heat exchanger 2 to the outside, and has a resin propeller fan 41 and a fan motor 42 that rotationally drives the propeller fan 41. The blower 4 is arranged above the outdoor unit 1, and the inside of the outdoor unit 9 is divided into left and right / rear heat exchangers 2, that is, the heat exchanger left suction surface 21, the heat exchanger right suction surface 22, and the heat exchanger rear suction surface. A flow of air is generated from the 23 side toward the upper side, that is, the blower 4 side.

FIG. 3 shows a cross-sectional view of the periphery of the electrical component unit 5 as seen from reference numerals AA in FIG. In FIG. 3, a power module 52 that controls an inverter and a fan to generate strong heat is mounted on the control board 51. The heat sink 7 is a member for releasing the heat of the power module 52 that generates strong heat, and is made of a metal material such as aluminum having high thermal conductivity. A plurality of heat dissipation fins 7a are formed on the heat sink 7 in order to improve heat dissipation performance. Further, the heat sink 7 and the power module 52 have a structure in close contact with each other, and the heat transferred from the power module 52 to the heat sink 7 is dissipated by the air passing between the heat radiation fins 7a to cool the power module 52. Further, it has a wind focusing member 6 which is fixed to the electric component casing 8 and covers the heat sink 7.

FIG. 4 shows a schematic configuration diagram of the wind focusing member 6. In FIG. 4, the wind focusing member 6 has a U-shaped flow path including an upper surface 80, a left side surface 81, and a right side surface 82, and a focusing portion including an upper surface 83 of the focusing portion, a left side surface 84 of the focusing portion, and a right side surface 85 of the focusing portion. Consists of.

Air flows into the wind focusing member 6 as shown by an arrow A, and a focusing portion including an upper surface 83 of the focusing portion, a left side surface of the focusing portion 84, and a right side surface of the focusing portion 85 is formed on the air inflow side 61 to take in air. Air is sent out from the air outflow side 62. The air inflow side 61 has a wider opening area than the air outflow side 62, so that a large amount of wind is taken in.

If the wind focusing member 6 has at least the upper surface 80 of the upper surface 80, the left side surface 81, and the right side surface 82, the amount of wind focusing decreases, but there is no problem in its original function, and the upper surface of the focusing portion. If it has at least two of 83, the left side surface of the focusing portion 84 and the right side surface of the focusing portion 85, it has a function as wind focusing. Further, it is not necessary to have only a U-shaped flow path and no focusing portion.

Further, the wind focusing member 6 may have a curved surface shape instead of a linear shape in all or a part of each surface constituting the wind focusing member 6.

Further, the wind focusing member 6 is made of resin, the electric component casing 8 is also made of resin, and the electric component casing 8 and the resin may be integrally molded. Further, the wind focusing member 6 is made of sheet metal, and may be integrally molded with the electrical component unit 5 or may be sheet metal molded.

FIG. 5 shows a vertical cross-sectional view of the periphery of the electrical component unit 5 as seen from reference numerals BB in FIGS. 1 and 2. In FIG. 5, as described above, when the blower 4 is driven, the outside air is sucked from the heat exchanger left side suction surface 21, the heat exchanger right side suction surface 22, and the heat exchanger rear side suction surface 23 to exchange heat. , Shroud 10 Blows out from above. The air flow A sucked above the outdoor unit 9 passes between the heat sink fins 7a of the heat sink 7, is sucked by the propeller fan 41 of the blower 4, and is blown out from the outlet 11. The heat radiated from the power module 52 to the heat sink 7 is dissipated by the air passing between the heat radiating fins 7a, and the power module 52 is cooled. At that time, since the heat sink 7 is covered with the wind focusing member 6 and the air inflow side 61 of the wind focusing member 6 has a wider opening area than the air outflow side 62, a large amount of wind flows in and the wind speed and air volume are improved. However, the heat dissipation performance of the heat sink 7 can be improved.

Further, the air taken in through the heat exchanger 2 flows toward the blower 4, but when viewed from above, the heat exchanger is located on the inner peripheral side of the outer circumference 24 of the bellmouth-shaped wide opening area of the shroud 10. Since the air sucked through 2 is collected, the air volume and speed are improved. Therefore, by arranging the heat sink 7 in that portion, the heat dissipation performance of the heat sink 7 can be further improved.

The heat sink 7 may be arranged between the outer circumference 24 of the bellmouth-shaped portion of the shroud 10 having a wide opening area and the inner circumference 25 of the portion having a narrow opening area when viewed from above. Since it is effective to arrange the whole at a position where the air volume and speed are improved by the shape of the shroud 10, when viewed from the upper surface, the corner portion on the outer peripheral side of the heat sink 7 is in contact with the inner diameter of the outer peripheral 24. Alternatively, the heat sink 7 may be arranged so that the outer peripheral side is in contact with the inner diameter of the outer peripheral 24. Further, when the wind focusing member 6 that takes in the wind to the heat sink 7 is viewed from the upper surface, between the outer circumference 24 of the bellmouth-shaped portion of the shroud 10 having a wide opening area and the inner circumference 25 of the portion having a narrow opening area. It may be placed in.

As described above, in the present embodiment, the outdoor unit of the air conditioner, the compressor that compresses and discharges the refrigerant, the heat exchanger that is connected to the compressor and exchanges heat with the compressed refrigerant, and the outside. A blower that takes in air from the inside and discharges it to the outside or upward through a heat exchanger, a shroud with a bell mouth shape, a control board, and an electric component casing with a heat sink that dissipates heat of the electrical components mounted on the control board. When viewed from above, the heat sink is arranged between the outer circumference of the bell mouth-shaped portion of the shroud having a wide opening area and the inner circumference of the portion having a narrow opening area. To do.

As a result, it is possible to improve the air volume and the wind speed passing through the heat sink without newly providing an air cooling fan or the like, and as a result, the heat dissipation performance of the heat sink can be improved.

Next, Example 2 will be described with reference to FIGS. 6 and 7. Since the same reference numerals as those in FIGS. 1 to 5 indicate the same parts, the description thereof will be omitted again.

In the first embodiment, the case where one heat sink dissipates the heat of the power module has been described, but the case where there are two or more heat sinks will be described. In this embodiment, even if there are two or more heat sinks, the configuration in which one wind focusing member is used is a change as compared with the first embodiment.

FIG. 6 is a schematic vertical sectional view of the outdoor unit of the air conditioner in this embodiment as viewed from the front. As shown in FIG. 6, in this embodiment, two heat sink upstream side 71 and heat sink downstream side 72 are mounted, but one wind focusing member 65 covers the heat sink upstream side 71 and the heat sink downstream side 72. It has become.

FIG. 7 shows a vertical cross-sectional view of the periphery of the electrical component unit 5 as seen from reference numerals BB in FIG. In FIG. 7, the air flow A passes between the heat sink upstream side 71 on the heat radiation fin upstream side 71a and the heat sink downstream side 72 on the heat radiation fin downstream side 72a, and is sucked by the propeller fan 41 of the blower 4 and blown out. It is blown out from 11. The heat radiated from the power module 52 to the heat sink upstream side 71 and the heat sink downstream side 72 is dissipated by the air passing between the heat radiating fin upstream side 71a and the heat radiating fin downstream side 72a, and the power module 52 is cooled. At that time, the upstream side 71 of the heat sink and the downstream side 72 of the heat sink are covered with the wind focusing member 65, and the air inflow side 66 of the wind focusing member 65 has a wider opening area than the air outflow side 67, so that a large amount of wind flows in. The wind speed and air volume can be improved, and the heat dissipation performance of the heat sink upstream side 71 and the heat sink downstream side 72 can be improved. At this time, if the wind focusing member 65 is not provided, the air volume and speed of the wind flowing to the heat sink downstream side 72 will be lower than that of the wind flowing between the heat sink upstream side 71. The wind flowing between the heat sink upstream side 71 is separated when flowing between the heat sink upstream side 71, and the wind flowing to the heat sink downstream side 72 is reduced. However, by setting the wind focusing member 65 of this embodiment, the separated wind can also be guided to the heat sink downstream side 72 through the wind focusing member 65.

As a result, even if two or more heat sinks are lined up in the air flow direction, deterioration of heat dissipation performance of the heat sink on the downstream side can be suppressed.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-mentioned examples have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1: Outdoor unit, 2: Heat exchanger, 3: Compressor, 4: Blower, 5: Electrical component unit, 6: Air focusing member, 7: Heat sink, 7a: Heat sink, 8: Electrical component casing, 9: Inside outdoor unit 10, 10: shroud, 11: outlet, 21: heat exchanger left suction surface, 22: heat exchanger right suction surface, 23: heat exchanger rear suction surface, 24: outer circumference of bell mouth-shaped wide opening area, 25 : Inner circumference of bell mouth shape with narrow opening area, 41: Propeller fan, 42: Fan motor, 51: Control board, 52: Power module, 61: Air inflow side, 62: Air outflow side, 65: Wind focusing Members, 70: outdoor unit, 71: heat sink upstream side, 72: heat sink downstream side, 71a: heat dissipation fin upstream side, 72a: heat dissipation fin downstream side

Claims (5)

A compressor that compresses and discharges the refrigerant,
A heat exchanger that is connected to the compressor and exchanges heat with the compressed refrigerant,
A blower that takes in air from the outside to the inside and discharges it to the outside or upward through the heat exchanger.
A shroud with a bellmouth shape and
It has a control board and an electrical component unit having an electric component casing having a heat sink for dissipating heat of the electric components mounted on the control board.
The heat sink is arranged between the outer circumference of the bellmouth-shaped portion of the shroud having a wide opening area and the inner circumference of the portion having a narrow opening area when viewed from above .
It has a wind focusing member having a U-shaped flow path, and the heat sink is covered with the wind focusing member.
An outdoor unit of an air conditioner, wherein the wind focusing member is made of resin, the electric component casing is also made of resin, and the electric component casing is integrally molded with resin . A compressor that compresses and discharges the refrigerant,
A heat exchanger that is connected to the compressor and exchanges heat with the compressed refrigerant,
A blower that takes in air from the outside to the inside and discharges it to the outside or upward through the heat exchanger.
A shroud with a bellmouth shape and
It has a control board and an electrical component unit having an electric component casing having a heat sink for dissipating heat of the electric components mounted on the control board.
The heat sink is arranged between the outer circumference of the bellmouth-shaped portion of the shroud having a wide opening area and the inner circumference of the portion having a narrow opening area when viewed from above.
A wind focusing member having a U-shaped flow path, not covering the heat sink該風focusing member,
An outdoor unit of an air conditioner, wherein the wind focusing member is made of sheet metal and is integrally molded or sheet metal molded with the electrical component unit . A compressor that compresses and discharges the refrigerant,
A heat exchanger that is connected to the compressor and exchanges heat with the compressed refrigerant,
A blower that takes in air from the outside to the inside and discharges it to the outside or upward through the heat exchanger.
A shroud with a bellmouth shape and
It has a control board and an electrical component unit having an electric component casing having a heat sink for dissipating heat of the electric components mounted on the control board.
The heat sink is arranged between the outer circumference of the bellmouth-shaped portion of the shroud having a wide opening area and the inner circumference of the portion having a narrow opening area when viewed from above.
An air conditioner characterized in that the heat sink is arranged at a position where a corner portion on the outer peripheral side of the heat sink is in contact with the inner diameter of the outer circumference of a portion of the shroud having a wide opening area in the shape of a bell mouth when viewed from above. Outdoor unit. A compressor that compresses and discharges the refrigerant,
A heat exchanger that is connected to the compressor and exchanges heat with the compressed refrigerant,
A blower that takes in air from the outside to the inside and discharges it to the outside or upward through the heat exchanger.
A shroud with a bellmouth shape and
It has a control board and an electrical component unit having an electric component casing having a heat sink for dissipating heat of the electric components mounted on the control board.
The heat sink is arranged between the outer circumference of the bellmouth-shaped portion of the shroud having a wide opening area and the inner circumference of the portion having a narrow opening area when viewed from above.
An outdoor unit of an air conditioner, characterized in that the heat sink is arranged so as to be in contact with the inner diameter of the outer periphery of a portion having a wide opening area in the shape of a bell mouth of the shroud when viewed from above . A compressor that compresses and discharges the refrigerant,
A heat exchanger that is connected to the compressor and exchanges heat with the compressed refrigerant,
A blower that takes in air from the outside to the inside and discharges it to the outside or upward through the heat exchanger.
A shroud with a bellmouth shape and
It has a control board and an electrical component unit having an electric component casing having a heat sink for dissipating heat of the electric components mounted on the control board.
The heat sink is arranged between the outer circumference of the bellmouth-shaped portion of the shroud having a wide opening area and the inner circumference of the portion having a narrow opening area when viewed from above.
It has a wind focusing member having a U-shaped flow path, and the heat sink is covered with the wind focusing member.
An air conditioner characterized in that the wind focusing member is arranged between the outer circumference of a bellmouth-shaped portion of the shroud having a wide opening area and the inner circumference of a portion having a narrow opening area when viewed from above. Outdoor unit.

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