JP2018113321A - Outdoor equipment of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that newly providing a fan for improving heat radiation performance of a heat sink in outdoor equipment of an air conditioner leads to problems of a space for installing the fan and cost increase of the product.SOLUTION: Outdoor equipment of an air conditioner has: a compressor which compresses a refrigerant to discharge the refrigerant; a heat exchanger which is connected with the compressor and conducts heat exchange with the compressed refrigerant; a blower which takes air from the outside into the inside and discharges the air to the outside or the upper side through the heat exchanger; a shroud having a bell mouth shape; and an electric component unit having a control board and an electric component casing having a heat sink which releases heat of electric components mounted on the circuit board. When viewed from above, the heat sink is disposed between an outer periphery of a portion where an opening area of the bell mouth shape of the shroud is wide and an inner periphery of a portion where the opening area is narrow.SELECTED DRAWING: Figure 2

Description

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

  Japanese Unexamined Patent Publication No. 2003-243586 (Patent Document 1) is known as a background art in the technical field related to a heat sink for cooling a heat-generating component. In Patent Document 1, “in an air-cooled heat sink having a fan provided with a plurality of fins on one side of a component mounting base on which a heat generating component is mounted and sending cooling air along the component mounting base surface between the fins, A cooling air guide body is provided between the fins to deflect the cooling air flow in the direction of the component mounting base, and the cooling air guide body has a length over the entire length of the fin in the cooling air flow direction. The cooling air inlet side front end portion and the base are provided so as to be inclined so that the distance A between the cooling air outlet side end portion and the base is larger. Yes.

JP 2003-243586 A

  Patent Document 1 describes an air-cooled heat sink including a fan. However, the air-cooled heat sink provided with the fan described in Patent Document 1 has a problem of cost increase as a space for installing the fan and a product. In recent years, heat sinks that suppress the 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. When the structure is adopted, there is a problem that it is difficult for the wind to pass between the fins due to the separation of the wind passing between the fins. In addition, there are cases where two or more power modules with strong heat generation are used on the control board, and there are cases where two or more heat sinks are mounted according to the power modules, but there are two heat sinks in the wind flow direction. When arranged above, the heat sink on the upstream side causes wind separation and the temperature of the wind rises, the air volume and speed passing through the heat sink on the downstream side decreases, and the air temperature rises. Will be reduced.

  The object of the present invention is to provide an air conditioner that can improve the heat dissipation performance of the heat sink without increasing the air volume and wind speed passing through the heat sink and without degrading the performance of the air conditioner without newly providing a fan or the like. It is to provide an outdoor unit.

  In view of the above-described background art and problems, the present invention is an outdoor unit of an air conditioner that includes a compressor that compresses and discharges a refrigerant, and a compressed refrigerant that is connected to the compressor and compressed. Heat exchanger for heat exchange, blower that takes air from outside into the interior and exhausts it to the outside or above through the heat exchanger, shroud with bell mouth shape, control board, and heat of electrical components mounted on the control board An electrical component unit having an electrical component casing having a heat sink for releasing the heat sink, and when the heat sink is viewed from above, an outer periphery of a portion having a wide opening area of the bell mouth shape of the shroud and a portion having a small opening area are included. The configuration is arranged between the circumference.

  According to the present invention, it is possible to improve the air volume and the air 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 the schematic longitudinal cross-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. It is a cross-sectional view around the electrical component unit of the outdoor unit of the air conditioner in the first embodiment. 1 is a schematic configuration diagram of a wind focusing member in Example 1. FIG. It is a longitudinal cross-sectional view of the electrical equipment unit periphery of the outdoor unit of the air conditioner in Example 1. FIG. It is the schematic longitudinal cross-sectional view seen from the front of the outdoor unit of the air conditioner in Example 2. FIG. It is a longitudinal cross-sectional view of the electrical equipment unit periphery of the outdoor unit of the air conditioner in Example 2. FIG.

    Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic longitudinal sectional view of the air conditioner outdoor unit according to the present embodiment as viewed from the front. FIG. 2 is a schematic top view of the outdoor unit of the air conditioner in the present embodiment.

  In FIG. 1, an outdoor unit 1 of an 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. Prepare.

  The shroud 10 made of resin has a bell mouth shape having a narrow opening area above the blower 4 and a wide opening area below the blower 4 and on the outdoor unit 9 side.

  The electrical component unit 5 includes an electrical component, an electrical component casing 8 that houses the electrical component, a heat sink 7 that is exposed to the inside of the outdoor unit 9 and releases the heat of the electrical component, and a wind focusing member 6. Note that the heat sink 7 and the wind focusing member 6 are originally not seen because they are fixed to the back surface of the electrical component casing 8 when viewed from the front, but are illustrated for explanation. As shown in FIG. 2, the heat sink 7 is disposed on the inner peripheral side of the outer periphery 24 of the portion of the shroud 10 having a wide bell mouth shape opening area when viewed from above.

  The wind focusing member 6 covers the heat sink 7 in the outdoor unit 9 so that a part of the air flowing in the outdoor unit 9 from the heat exchanger 2 side toward the blower 4 side flows. In addition, 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 shape bent in a concave shape in FIG. 2 and is disposed along 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 of the outdoor unit 1. Has been.

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

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

  FIG. 3 shows a cross-sectional view around the electrical component unit 5 as seen from the reference 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 a high thermal conductivity. The heat sink 7 is formed with a plurality of heat radiating fins 7a in order to improve heat radiating performance. Further, the heat sink 7 and the power module 52 are 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 radiation fins 7a, and the power module 52 is cooled. Further, it has a wind focusing member 6 that is fixed to the electrical 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 includes 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 a focusing portion upper surface 83, a focusing portion left side surface 84, and a focusing portion right side surface 85. Consists of.

  Air flows into the wind converging member 6 as indicated by an arrow A, and a converging portion including a converging portion upper surface 83, a converging portion left side surface 84 and a converging portion right side surface 85 is formed on the air inflow side 61, and air is taken in. Air is sent out from the air outflow side 62. Since the air inflow side 61 has a larger opening area than the air outflow side 62, a large amount of wind is taken in.

  It should be noted that if the wind focusing member 6 has at least the upper surface 80 among the upper surface 80, the left side surface 81, and the right side surface 82, the amount of wind focusing is reduced, but there is no problem as an original function. 83, at least two of the converging unit left side surface 84 and the converging unit right side surface 85 have a function as wind converging. Further, only the U-shaped flow path may be provided without the converging portion.

  Further, the wind focusing member 6 may have a curved shape in which all or a part of each surface constituting the wind focusing member 6 is not a linear shape.

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

  FIG. 5 is a longitudinal sectional view around the electrical component unit 5 as seen from the reference BB in FIGS. 1 and 2. In FIG. 5, as described above, when the blower 4 is driven, external 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. Then, the shroud 10 is blown out from above. The air flow A sucked upward in the outdoor unit 9 passes between the heat radiation fins 7a of the heat sink 7 and is sucked by the propeller fan 41 of the blower 4 and blown out from the blowout port 11 to the outside. The heat radiated from the power module 52 to the heat sink 7 is dissipated by the air passing between the 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 larger opening area than the air outflow side 62, the wind speed and the air volume are improved by the inflow of a large amount of wind. In addition, the heat dissipation performance of the heat sink 7 can be improved.

  In addition, the air taken in via the heat exchanger 2 flows toward the blower 4, but when viewed from the upper surface, the inner periphery side of the outer periphery 24 of the portion of the shroud 10 having a large bell mouth shape opening area is the heat exchanger. Since the air sucked in through 2 is collected, the air volume and the wind speed are improved. Therefore, the heat dissipation performance of the heat sink 7 can be further improved by disposing the heat sink 7 in that portion.

  The heat sink 7 may be disposed between the outer periphery 24 of the bell mouth-shaped portion of the shroud 10 having a large opening area and the inner periphery 25 of the portion having a small opening area when viewed from the top. Since it is effective to arrange the whole at a position where the air volume / velocity is improved by the shape of the shroud 10, the arrangement is such that the outer peripheral side corner of the heat sink 7 is in contact with the inner diameter of the outer periphery 24 when viewed from above. Or you may arrange | position so that the outer peripheral side of the heat sink 7 may contact | connect the internal diameter of the outer periphery 24. FIG. Further, when the wind focusing member 6 that takes in the wind to the heat sink 7 is viewed from above, it is between the outer periphery 24 of the portion of the shroud 10 having a large bell mouth shape opening area and the inner periphery 25 of the portion having a small opening area. You may arrange in.

  As described above, in this embodiment, the outdoor unit of an air conditioner is a compressor that compresses and discharges a refrigerant, a heat exchanger that is connected to the compressor and performs heat exchange with the compressed refrigerant, A blower that takes in air from the inside and exhausts it to the outside or above through a heat exchanger, a shroud having a bell mouth shape, a control board, and an electrical component casing having a heat sink that releases heat of the electrical components mounted on the control board, An electrical component unit having a configuration in which the heat sink is disposed between the outer periphery of the portion of the bell mouth shape of the shroud having a wide opening area and the inner periphery of the portion having a small opening area when viewed from above. To do.

  As a result, it becomes possible to improve the air volume and the air 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. Note that the same reference numerals as those in FIGS.

  In the present embodiment, the case where there is one heat sink that dissipates the heat of the power module is described in the first embodiment, but the case where there are two or more heat sinks will be described. In the present embodiment, a configuration in which two or more heat sinks are used and one wind focusing member is used is a change when compared with the first embodiment.

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

  FIG. 7 is a longitudinal sectional view around the electrical component unit 5 as seen from the reference BB in FIG. In FIG. 7, the air flow A passes between the radiating fin upstream side 71 a on the heat sink upstream side 71 and between the radiating fin downstream side 72 a on the heat sink downstream side 72, and is sucked by the propeller fan 41 of the blower 4. 11 is blown out. 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 radiation fin upstream side 71a and the radiation fin downstream side 72a, and the power module 52 is cooled. At that time, the heat sink upstream side 71 and the heat sink downstream side 72 are covered with the wind focusing member 65, and the air inflow side 66 of the wind focusing member 65 has a larger opening area than the air outflow side 67, so that a large amount of wind flows. Thus, the wind speed and the air volume are improved, and the heat radiation performance of the heat sink upstream side 71 and the heat sink downstream side 72 can be improved. At this time, when there is no wind focusing member 65, the airflow and the wind speed of the wind flowing to the heat sink downstream side 72 are lower than 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 lowered. However, by setting the wind focusing member 65 according to the present embodiment, the wind to be peeled can also be guided to the heat sink downstream side 72 through the wind focusing member 65.

  Thereby, even if two or more heat sinks are arranged in the air flow direction, it is possible to suppress a decrease in heat dissipation performance of the heat sink on the downstream side.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

1: outdoor unit, 2: heat exchanger, 3: compressor, 4: blower, 5: electrical component unit, 6: wind focusing member, 7: heat sink, 7a: radiating fin, 8: electrical component casing, 9: in outdoor unit 10: shroud, 11: outlet, 21: heat exchanger left side suction surface, 22: heat exchanger right side suction surface, 23: heat exchanger rear side suction surface, 24: outer periphery of a bell mouth-shaped wide opening area, 25 : Inner circumference of a bell mouth-shaped portion having a small 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 70, outdoor unit, 71: upstream side of heat sink, 72: downstream side of heat sink, 71a: upstream side of radiation fin, 72a: downstream side of radiation fin

Claims (11)

A compressor that compresses and discharges the refrigerant;
A heat exchanger connected to the compressor and exchanging heat with the compressed refrigerant;
A blower that takes in air from the outside into the inside and exhausts it outside or above through the heat exchanger;
A shroud having a bellmouth shape;
An electrical component unit having a control board, and an electrical component casing having a heat sink for releasing heat of the electrical components mounted on the control board,
An outdoor of an air conditioner, wherein the heat sink is disposed between an outer periphery of a portion having a wide opening area of the bell mouth shape of the shroud and an inner periphery of a portion having a small opening area when viewed from above. Machine. An outdoor unit for an air conditioner according to claim 1,
A wind focusing member having a U-shaped channel,
An outdoor unit of an air conditioner, wherein the heat sink is covered with the wind collecting member. An outdoor unit for an air conditioner according to claim 2,
The wind focusing member is composed of a U-shaped channel composed of an upper surface, a left side surface, and a right side surface, and a converging unit composed of an upper surface of the converging unit, a left side surface of the converging unit, and a right side surface of the converging unit. Is an outdoor unit of an air conditioner characterized by being wider than the air outflow side. An outdoor unit for an air conditioner according to claim 3,
The wind focusing member has at least an upper surface of the upper surface, the left side surface, and the right side surface, and has at least two surfaces of the upper surface of the focusing portion, the left side surface of the focusing portion, and the right side surface of the focusing portion. A featured outdoor unit of an air conditioner. It is an outdoor unit of the air conditioner of Claim 3 or 4,
The outdoor unit of an air conditioner, wherein the wind converging member has a shape in which all or a part of each surface constituting the wind focusing member is curved. An outdoor unit for an air conditioner according to any one of claims 2 to 5,
The outdoor unit of an air conditioner, wherein the wind focusing member is made of resin, and the electrical component casing is also resin, and the electrical component casing and the resin are integrally molded. An outdoor unit for an air conditioner according to any one of claims 2 to 5,
The outdoor unit of an air conditioner, wherein the wind collecting member is made of sheet metal, and is integrally or sheet-metal molded with the electrical component unit. An outdoor unit for an air conditioner according to any one of claims 2 to 7,
An outdoor unit for an air conditioner, comprising: a plurality of heat sinks, wherein the plurality of heat sinks are covered with the wind focusing member. An outdoor unit for an air conditioner according to claim 1,
An air conditioner characterized in that the heat sink is disposed at a position where an outer peripheral side corner of the heat sink is in contact with an inner diameter of an outer periphery of a portion having a wide opening area of the bell mouth shape of the shroud when viewed from above. Outdoor unit. An outdoor unit for an air conditioner according to claim 1,
An outdoor unit of an air conditioner, wherein the heat sink is disposed so as to be in contact with an inner diameter of an outer periphery of a portion having a wide opening area of the bell mouth shape of the shroud when viewed from above. An outdoor unit for an air conditioner according to claim 2,
An air conditioner characterized in that the wind converging member is disposed between an outer periphery of a portion of the shroud with a bell mouth shape having a large opening area and an inner periphery of a portion having a small opening area when viewed from above. Outdoor unit.

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