WO2018061071A1

WO2018061071A1 - Outdoor unit of air conditioner

Info

Publication number: WO2018061071A1
Application number: PCT/JP2016/078354
Authority: WO
Inventors: 裕一庄司; 進一内野
Original assignee: 三菱電機株式会社
Priority date: 2016-09-27
Filing date: 2016-09-27
Publication date: 2018-04-05
Also published as: EP3327362B1; JP6632733B2; CN207778627U; EP3327362A1; EP3327362A4; JPWO2018061071A1

Abstract

An outdoor unit of an air conditioner, having a plurality of storage compartments disposed adjacent to each other and obtained by partitioning, by partition plates, the interior of a casing in which an inlet and an outlet are formed. The storage compartments comprise: a machine compartment in which a coolant circuit having a compressor is disposed; an electrical compartment in which a power substrate for driving the compressor and a control substrate for controlling the compressor are disposed; a ventilation compartment in which a heat sink having a cooling fan is disposed, the ventilation compartment intaking outside air through the inlet formed in the casing; and a heat exchanger compartment in which a heat exchanger and a fan are disposed. A ventilation path communicating between the ventilation compartment and the electrical compartment is formed in the partition plate partitioning the ventilation compartment and the electrical compartment.

Description

Air conditioner outdoor unit

The present invention relates to an outdoor unit of an air conditioner having a function of improving the cooling capacity of a heated electric product.

Conventionally, an outdoor unit of an air conditioner has a configuration in which the inside of a housing forming an outer shell is partitioned by a partition plate and includes a plurality of storage chambers such as a machine room, an electrical component room, and a blower room. ing. The electrical component room stores electrical components such as a power board that drives a compressor disposed in the machine room, and a control board that controls a refrigerant circuit composed of the compressor and the like. Electrical products generate heat when the air conditioner is driven. If the exhaust heat does not catch up and the temperature is too high, the substrate may be damaged due to thermal expansion, the characteristics of the semiconductor may change, or the parts on the substrate There is a problem that deteriorates. Therefore, in the outdoor unit of the air conditioner, various air path designs are performed in order to suppress the heat generation of the electrical product.

For example, in Patent Document 1, a blower chamber having a propeller fan and a machine chamber having an electrical box are partitioned by a partition plate. The machine room has a compressor room having a compressor and an air passage room that communicates between the outside and the blower room. The compressor room and the air channel room are partitioned by an electrical box having heat radiation fins attached to the upper surface. In the electrical box, for example, a power board for driving a compressor and the like, and a control board for controlling a refrigerant circuit and the like are housed.

Japanese Utility Model Publication No. 6-35835

Like the outdoor unit of the air conditioner of patent document 1, in the structure which attached the radiation fin to the upper surface of the electrical equipment box, only the electrical components arrange | positioned in the upper surface vicinity of the electrical equipment box which is contacting the radiation fin can be cooled. It is not possible to sufficiently cool the electrical components arranged at positions away from the radiation fins. That is, in the outdoor unit of the air conditioner disclosed in Patent Document 1, the entire electrical box cannot be sufficiently cooled, so the exhaust heat of the heated electrical components cannot catch up, and the substrate becomes damaged due to expansion due to heat due to excessive heat. Or the characteristics of the semiconductor may change, or the components on the board may deteriorate.

The present invention has been made to solve the above-described problems, and can reduce the temperature of the entire electrical component room in which the power board and the control board are arranged to sufficiently cool the electrical components, It aims at providing the outdoor unit of an air conditioner which can prevent deterioration of an electrical component.

An outdoor unit for an air conditioner according to the present invention is an outdoor unit for an air conditioner having a plurality of storage chambers arranged adjacent to each other by partitioning the inside of a housing in which an inlet and an outlet are formed with a partition plate. The storage chamber includes a machine room in which a refrigerant circuit having a compressor is disposed, a power board that drives the compressor, and an electrical component room in which a control board that controls the compressor is disposed; A heat sink having cooling fins is disposed, and includes a ventilation chamber that takes in outside air through a suction port formed in the housing, and a heat exchanger chamber in which a heat exchanger and a fan are disposed, and the ventilation chamber The partition plate that divides the electrical component chamber is formed with a ventilation path that communicates the ventilation chamber and the electrical component chamber.

According to the outdoor unit of the air conditioner according to the present invention, the outside air taken in from the ventilation chamber is supplied to the partition plate that partitions the ventilation chamber that takes in outside air through the suction port and the electrical component room having the power board and the control board. Since the ventilation path for sending to the room is formed, the air flowing into the electrical component room can cool the electrical components away from the heat sink, lowering the temperature of the entire electrical component room, Deterioration can be prevented.

It is the perspective view which showed the internal structure of the outdoor unit of the air conditioner which concerns on embodiment of this invention from the front side. It is the perspective view which showed the internal structure of the outdoor unit of the air conditioner which concerns on embodiment of this invention from the back side. It is the top view which showed the internal structure of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is the perspective view which showed roughly the heat sink which comprises the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is the perspective view which showed schematically the duct which comprises the outdoor unit of the air conditioner which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate. Moreover, about the structure as described in each figure, the shape, a magnitude | size, arrangement | positioning, etc. can be suitably changed within the scope of the present invention.

Embodiment.
FIG. 1 is a perspective view showing an internal structure of an outdoor unit of an air conditioner according to an embodiment of the present invention from the front side. FIG. 2 is a perspective view showing the internal structure of the outdoor unit of the air conditioner according to the embodiment of the present invention from the back side. FIG. 3 is a plan view showing the internal structure of the outdoor unit of the air conditioner according to the embodiment of the present invention. In FIG. 2, the inside of the machine room 2 is omitted.

As shown in FIGS. 1 and 2, the outdoor unit 1 of the air conditioner according to the present embodiment includes a casing 14 having a substantially rectangular parallelepiped shape. As an example, the housing 14 is configured by combining an L-shaped front side panel, right side panel, bottom panel, top panel, and back panel. As shown in FIGS. 1 to 3, the outdoor unit 1 has a housing 14 partitioned by partition plates 8 to 10 made of sheet metal, and has a plurality of storage chambers adjacent to each other. The storage chamber is composed of four parts: a machine room 2, an electrical component room 3, a ventilation room 4, and a heat exchanger room 5. Although illustration in detail is omitted, the front side panel is provided with an air outlet formed in a circular shape as an example. The air outlet is covered with a fan guard. The rear panel is provided with a suction port for sucking outside air into the ventilation chamber 4. A louver 16 having an inflow opening opened downward is attached to the suction port. As an example, the gallery 16 has a configuration in which blind blades are attached in parallel downward.

The machine room 2 is partitioned from the heat exchanger room 5 by a partition plate 10, and is partitioned from the electrical component room 3 and the ventilation chamber 4 by a partition plate 9. The machine room 2 houses a refrigerant circuit 17 in which a compressor 18, a four-way valve, an expansion valve, an indoor unit, and the like installed on the bottom panel of the housing 14 are connected by refrigerant piping.

The electrical component chamber 3 is partitioned from the heat exchanger chamber 5 by a partition plate 10, partitioned from the ventilation chamber 4 by a partition plate 8, and partitioned from the mechanical chamber 2 by a partition plate 9. Yes. The electrical component room 3 houses a power board 11 on which a power module for an inverter, a semiconductor, a microcomputer, and the like are mounted, and a control board 12 that controls the rotational speed and the like of the compressor 18. The control board 12 is configured by, for example, hardware such as a circuit device that realizes this function, or software executed on an arithmetic device such as a microcomputer or a CPU. The power substrate 11 is attached to the partition plate 8 that partitions the ventilation chamber 4 and the electrical component chamber 3 with the back side in contact. The control board 12 is arranged with an interval S from the power board 11. In the partition plate 10, an opening for communicating with the electrical component chamber 3 and the heat exchanger chamber 5 is formed at a position of a gap having a space S.

The ventilation chamber 4 is partitioned from the heat exchanger chamber 5 by a partition plate 10, partitioned from the electrical component chamber 3 by a partition plate 8, and partitioned from the mechanical chamber 2 by a partition plate 9. In addition, outside air is taken into the housing 14 through the suction port (Gallery 16) formed in the housing 14. As shown in FIGS. 1 to 3, the ventilation chamber 4 stores a heat sink 6 that cools the power board 11 stored in the electrical component chamber 3.

FIG. 4 is a perspective view schematically showing a heat sink constituting the outdoor unit of the air conditioner according to the embodiment of the present invention. The heat sink 6 is a metal plate excellent in heat dissipation such as aluminum or copper, a flat base plate (not shown), and a plurality of cooling fins 61 standing on the upper surface of the base plate at intervals. It consists of The heat sink 6 is fixed to the inside of a frame 60 made of metal such as aluminum, copper, or resin, and is attached to a partition plate 8 that partitions the electrical component chamber 3 and the ventilation chamber 4. The power board 11 of the electrical component chamber 3 is disposed at a position facing the plate 8 with the plate 8 therebetween.

In the frame body 60 of the heat sink 6, a heat sink inlet 6 a is formed at a position facing the gallery 16 as an opening for taking in outside air flowing into the ventilation chamber 4. Further, a heat sink outlet 6b is formed in the frame body 60 of the heat sink 6 as an opening through which the air taken in is exhausted on the side surface facing the heat exchanger chamber 5 side. That is, the heat sink 6 takes the outside air sucked into the ventilation chamber 4 from the louver 16 provided on the side surface of the housing 14 into the inside through the heat sink inlet 6a and discharges it outside through the heat sink outlet 6b. Since the heat sink 6 is disposed so that the heat sink inlet 6a faces the gallery 16, the outside air flowing from the gallery 16 can be easily taken into the interior, and the cooling effect can be enhanced.

As shown in FIG. 4, the cooling fins 61 of the heat sink 6 are arranged in the horizontal direction with a space therebetween, thereby minimizing the resistance against the wind that has entered, ensuring a sufficient air volume and providing a cooling effect. Can be increased. However, the cooling fin 61 is not limited to the structure arrange | positioned in the horizontal direction, The structure set as the other arrangement | positioning may be sufficient.

On the partition plate 8 that partitions the ventilation chamber 4 and the electrical component chamber 3, a ventilation path 80 that connects the ventilation chamber 4 and the electrical component chamber 3 is formed. The ventilation path 80 is formed to send outside air sucked from the ventilation chamber 4 to the electrical component room 3 through the ventilation path 80. The ventilation path 80 is formed as a rectangular cutout at the corner of the upper end of the partition plate 8. The reason for forming the ventilation path 80 at the corner of the upper end portion of the partition plate 8 is to prevent water droplets generated inside the housing 14 from entering the electrical component chamber 3. This is because the water droplets drop downward due to the gravitational action and thus cannot pass through the ventilation path 80. Therefore, the outdoor unit 1 can cool the power board 11 and the control board 12 by flowing a certain amount of wind from the ventilation chamber 4 to the electrical component chamber 3 through the ventilation path 80, and water droplets can enter the electrical component chamber 3. Intrusion can be effectively prevented. In addition, the ventilation path 80 should just be formed in the upper end part vicinity of the partition plate 8, and as shown in the figure, it is not limited to an upper end part. The ventilation path 80 is preferably formed in the vicinity of the upper end portion of the partition plate 8, but may be provided in a lower region of the partition plate 8. Furthermore, the ventilation path 80 may have a configuration in which a plurality of ventilation paths 80 are arranged in parallel, and is not limited to a rectangular cutout, and may be, for example, a circular shape. In short, it is sufficient that the ventilation path 80 allows the ventilation chamber 4 and the electrical component chamber 3 to communicate with each other and allows the air in the ventilation chamber 4 to flow out to the electrical component chamber 3. The position, shape, size, etc. It shall be provided with appropriate changes in consideration.

The heat exchanger room 5 is partitioned by a partition plate 10 from the machine room 2, the electrical component room 3 and the ventilation room 4. The heat exchanger chamber 5 accommodates an outdoor heat exchanger 7, an outdoor fan 15, an outdoor fan motor (not shown), and the like. The heat exchanger chamber 5 is provided with a duct 13 that communicates between the heat exchanger chamber 5 and the ventilation chamber 4 and between the heat exchanger chamber 5 and the electrical component chamber 3.

As shown in FIG. 3, the outdoor heat exchanger 7 has, for example, an L shape in plan view, and is provided along the left side surface portion and the back panel of the front side panel. The outdoor fan 15 is an air blowing unit composed of a propeller fan, for example, and generates an air circulation for efficiently performing heat exchange. The outdoor fan 15 has a function of sucking outside air from the back side of the outdoor unit 1 into the outdoor unit 1 and blowing the outside air sucked into the outdoor unit 1 toward the front side of the outdoor unit 1. The outdoor fan motor is a driving means for driving the outdoor fan 15 and is attached to a support plate provided in the heat exchanger chamber 5 by using a fixing means such as a screw.

FIG. 5 is a perspective view schematically showing a duct constituting the outdoor unit of the air conditioner according to the embodiment of the present invention. The duct 13 shown in FIG. 5 shows a state viewed from the back side. The duct 13 is provided for smoothly drawing wind from the ventilation chamber 4 and the electrical component chamber 3 into the heat exchanger chamber 5. As shown in FIGS. 1 to 3, the duct 13 is attached to the partition plate 10 so as to straddle the partition plate 8 that partitions the ventilation chamber 4 and the electrical component chamber 3. As shown in FIG. 5, a first duct inlet 13 a that communicates with the ventilation chamber 4 and a second duct inlet 13 b that communicates with the electrical component chamber 3 are formed on the back side of the duct 13. In addition, the duct 13 is provided as a duct outlet 13c through which air that has flowed into the duct 13 flows out, with the opening surface on the heat exchanger chamber 5 side facing downward.

The first duct inlet 13 a communicating with the ventilation chamber 4 communicates with the heat sink outlet 6 b of the heat sink 6 housed in the ventilation chamber 4. The air discharged from the heat sink outlet 6b flows into the duct 13 from the first duct inlet 13a, and flows out from the duct outlet 13c to the heat exchanger chamber 5.

On the other hand, the second duct inlet 13 b communicating with the electrical component chamber 3 is disposed in a gap provided between the power board 11 and the control board 12. An opening communicating with the second duct inlet 13b is formed at a location located in the gap of the partition plate 10. The air flowing into the electrical component chamber 3 cools the electrical component chamber 3, then flows into the duct 13 from the second duct inlet 13 b, and flows out from the duct outlet 13 c to the heat exchanger chamber 5.

Here, the air flow of the outdoor unit 1 will be described with reference to FIGS. As shown in FIG. 2, the outdoor unit 1 of the air conditioner according to the present embodiment has a negative pressure inside the heat exchanger chamber 5 when the outdoor fan 15 accommodated in the heat exchanger chamber 5 rotates. Then, outside air flows from the louver 16 into the ventilation chamber 4. The outside air flowing into the ventilation chamber 4 is divided into air flowing into the heat sink 6 and air flowing into the electrical component chamber 3 through the ventilation path 80 formed in the partition plate 8 that partitions the ventilation chamber 4 and the electrical component chamber 3. To be separated.

The air flowing into the heat sink 6 flows into the frame body 60 from the heat sink inlet 6a, passes through the plurality of cooling fins 61, and then flows out from the heat sink outlet 6b. The heat sink 6 cools the power board 11 accommodated in the electrical component chamber 3 by flowing air inside. The air that has flowed out of the heat sink outlet 6b flows into the duct 13 from the first duct inlet 13a communicating with the heat sink outlet 6b, and then turns vertically downward and flows out of the duct outlet 13c into the heat exchanger chamber 5. The The air that has flowed into the heat exchanger chamber 5 is subjected to heat exchange between the refrigerant and the air by the outdoor heat exchanger 7 and then blown out from the outlet of the front side panel by the outdoor fan 15.

On the other hand, the air that has flowed into the electrical component chamber 3 through the ventilation path 80 formed in the partition plate 8 passes through the gap between the control board 12 and the power board 11 and communicates with the heat exchanger chamber 5. After flowing into the inside of the duct 13 from 13b, the direction is changed vertically downward, and then flows out from the duct outlet 13c to the heat exchanger chamber 5. The air flowing into the heat exchanger chamber 5 is subjected to heat exchange between the refrigerant and the air by the outdoor heat exchanger 7 and then blown out from the outlet of the front side panel by the outdoor fan 15.

In the outdoor unit 1 of the air conditioner according to the present embodiment, a ventilation path 80 that connects the ventilation chamber 4 and the electrical component chamber 3 is formed on the partition plate 8 that partitions the ventilation chamber 4 and the electrical component chamber 3. Therefore, the outside air sucked from the ventilation chamber 4 can be sent to the electrical component room 3 through the ventilation path 80. Therefore, the outdoor unit 1 can sufficiently cool the electrical components such as the control board 12 that is required to be cooled away from the heat sink 6 by the air flowing into the electrical component chamber 3. It is possible to prevent the electrical components from deteriorating by lowering the temperature.

In the outdoor unit 1, the heat sink 6 is disposed adjacent to the power board 11 disposed in the electrical component room 3 with the partition plate 8 therebetween, and the control board 12 is spaced from the power board 11 by an interval S. Are arranged. Therefore, the outdoor unit 1 can directly cool the back side of the power board 11 with the heat sink 6, and the front side of the power board 11 that faces the control board 12 is a gap between the power board 11 and the control board 12. It can cool with the air which flowed in, and can improve the cooling effect of the electric power board 11 which generates heat most.

Moreover, since the outdoor unit 1 is partitioned by the partition plate 9 between the ventilation chamber 4 and the electrical component room 3, and the machine room 2, the machine room with low necessity of cooling the external air which flowed into the ventilation chamber 4 A large amount of wind can be caused to flow into the electrical component room 3 that is highly required to be cooled without being allowed to flow into the cooling chamber 2, thereby enhancing the cooling effect. In addition, the outdoor unit 1 has an effect of preventing noise because the sound generated in the machine room 2 is blocked by the partition plates 9 and 10 and is not easily transmitted from the louver 16 to the outside.

In addition, since the outdoor unit 1 is partitioned between the electrical component room 3 and the ventilation chamber 4 by the partition plate 8, it is difficult for water droplets such as rain flowing from the gallery 16 to enter the electrical component chamber 3. It is possible to prevent rusting and the like of the electrical components arranged in the electrical component room 3, and maintain the quality.

Moreover, since the ventilation path 80 is provided in the vicinity of the upper part of the partition plate 8 in the outdoor unit 1, even if water droplets are generated inside, the water droplets that drop downward due to the gravity action cannot exceed the ventilation path 80. Therefore, the outdoor unit 1 can cool the power board 11 and the control board 12 by allowing air to flow from the ventilation chamber 4 to the electrical component room 3, and can effectively prevent water from entering the electrical component chamber 3. Can be prevented.

Further, the outdoor unit 1 includes a duct 13 that communicates between the heat exchanger chamber 5 and the ventilation chamber 4 and between the heat exchanger chamber 5 and the electrical component chamber 3. Therefore, it is possible to prevent the rain that has entered from the air outlet of the heat exchanger room 5 from entering the electrical component room 3 through the duct 13 even during a storm, for example. Therefore, this outdoor unit 1 can prevent the situation in which the electrical components housed in the electrical component room 3 rust, and can maintain the quality. Further, the outdoor unit 1 also has an effect of easily drawing the wind due to the negative pressure of the outdoor fan 15 inside when the outdoor fan 15 is disposed below the duct 13.

In the outdoor unit 1, since the heat sink 6 is disposed inside the frame body 60 having an opening (heat sink inlet 6 a) at a position facing the suction port formed in the housing 14, the outdoor unit 1 sucked from the gallery 16. It becomes easy to take outside air into the inside from the opening, and the cooling effect can be enhanced.

In addition, since the cooling fins 61 of the heat sink 6 are arranged in the horizontal direction, the outdoor unit 1 can minimize the resistance against the wind that has entered the inside of the frame body 60, and is cooled by ensuring a sufficient air volume. The effect can be enhanced.

Further, since the outdoor unit 1 is provided with a gallery 16 having an inflow port opened downward at the suction port of the housing 14, it is difficult for rain to enter the ventilation chamber 4 even during a storm, and the electrical component room. 3 can also be prevented. Therefore, the outdoor unit 1 can prevent the rust of the electrical product due to the intrusion of rain, and can maintain the quality.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the embodiment described above. For example, each storage unit may be configured to store other members in addition to the above-described members. The duct 13 may be provided separately on the ventilation chamber 4 side and the electrical component chamber 3 side. In short, it should be noted that the scope of the present invention also includes the scope of various changes, applications, and uses made by those skilled in the art as needed.

1 outdoor unit, 2 machine room, 3 electrical component room, 4 ventilation room, 5 heat exchanger room, 6 heat sink, 6a heat sink inlet, 6b heat sink outlet, 7 outdoor heat exchanger, 8, 9, 10 partition plate, 11 power Board, 12 control board, 13 duct, 13a 1st duct inlet, 13b 2nd duct inlet, 13c duct outlet, 14 housing, 15 outdoor fan, 16 gallery, 17 refrigerant circuit, 18 compressor, 60 frame, 61 cooling Fin, 80 vents.

Claims

An interior unit of an air conditioner having a plurality of storage chambers that are partitioned adjacent to each other by a partition plate inside the housing in which the inlet and the outlet are formed,
The storage room is
A machine room in which a refrigerant circuit having a compressor is arranged;
An electrical component room in which a power board for driving the compressor and a control board for controlling the compressor are disposed;
A heat sink having cooling fins is disposed, and a ventilation chamber that takes in outside air through a suction port formed in the housing,
A heat exchanger chamber in which a heat exchanger and a fan are arranged, and
An outdoor unit of an air conditioner, wherein a ventilation plate that connects the ventilation chamber and the electrical component chamber is formed in a partition plate that partitions the ventilation chamber and the electrical component chamber.
The heat sink is disposed adjacent to the power board disposed in the electrical component room with a partition plate therebetween,
The outdoor unit of an air conditioner according to claim 1, wherein the control board is disposed at a distance from the power board.
The outdoor unit of an air conditioner according to claim 1 or 2, wherein the ventilation path is formed in the vicinity of an upper end portion of a partition plate that partitions the ventilation chamber and the electrical component chamber.
In the heat exchanger chamber, a duct communicating between the heat exchanger chamber and the ventilation chamber and between the heat exchanger chamber and the electrical component chamber has an opening surface on the heat exchanger chamber side. The outdoor unit for an air conditioner according to any one of claims 1 to 3, wherein the outdoor unit is provided facing downward.
The outdoor unit for an air conditioner according to any one of claims 1 to 4, wherein the heat sink is disposed inside a frame body having an opening at a position facing the suction port formed in the housing. .
The outdoor unit for an air conditioner according to any one of claims 1 to 5, wherein the cooling fins of the heat sink are arranged in a horizontal direction.
The outdoor unit for an air conditioner according to any one of claims 1 to 6, wherein a louver having an inflow port opened downward is provided at a suction port of the housing.