JP6632733B2 - Outdoor unit of air conditioner - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an outdoor unit of an air conditioner having a function of improving a cooling capability of a heated electric component.

  BACKGROUND ART Conventionally, an outdoor unit of an air conditioner has a configuration in which a housing forming an outer shell is partitioned by a partition plate and includes a plurality of storage rooms such as a machine room, an electrical component room, and a blower room. ing. In the electrical component room, electrical components such as a power board for driving a compressor disposed in the machine room and a control board for controlling a refrigerant circuit composed of the compressor and the like are stored. Electric components generate heat when the air conditioner is driven. If the temperature rises too high to catch up with the exhaust heat, the substrate may be damaged by expansion due to heat, the characteristics as a semiconductor may change, or components on the substrate may change. Is degraded. Therefore, in an outdoor unit of an air conditioner, various wind path designs are performed in order to suppress heat generation of electric components.

  For example, Patent Literature 1 has a configuration in which a blower room having a propeller fan and a machine room having an electrical box are separated by a partition plate. The machine room has a compressor room having a compressor and an air passage room communicating between the outside and the blower room. The compressor room and the air passage room are separated by an electrical box having a radiation fin mounted on the upper surface. The electrical box contains, for example, a power board for driving a compressor and the like and a control board for controlling a refrigerant circuit and the like.

JP-A-6-35835

  In the configuration in which the radiation fins are attached to the upper surface of the electrical box like the outdoor unit of the air conditioner of Patent Literature 1, only the electric components arranged near the upper surface of the electrical box in contact with the radiation fins can be cooled. Therefore, it is not possible to sufficiently cool the electric components arranged at a position 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 that the exhaust heat of the heated electrical components cannot catch up, and the temperature of the electrical components becomes excessively high, and the substrate is damaged by expansion due to heat. Or the characteristics as a semiconductor may change, or components on the substrate may be deteriorated.

  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, thereby sufficiently cooling the electrical components. An object of the present invention is to provide an outdoor unit of an air conditioner that can prevent deterioration of electric components.

An outdoor unit of an air conditioner according to the present invention is an outdoor unit of an air conditioner having a plurality of storage rooms which are separated from each other by partitioning an inside of a housing having an inlet and an outlet formed by a partition plate. In the storage room, a machine room in which a refrigerant circuit having a compressor is arranged, a power board that drives the compressor, and an electrical component room in which a control board that controls the compressor is arranged, A heat sink having cooling fins is arranged, 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 arranged, and the ventilation chamber includes the partition plate which partitions said electrical component compartment, the ventilation chamber and air passage which Ru is communicated is formed between the electric component compartment, to the heat exchanger chamber, the heat exchanger chamber and the ventilating chamber And the heat exchanger room and the electrical component room Duct communicating between the one in which is provided toward the open face of the heat exchanger chamber side downward.

  ADVANTAGE OF THE INVENTION According to the outdoor unit of the air conditioner which concerns on this invention, the external air taken in from the ventilation room is supplied to the partition board which separates the ventilation room which takes in outside air through an inlet, and the electric component room which has a power board and a 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 separated 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 roughly 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 portions are denoted by the same reference characters, and description thereof will be omitted or simplified as appropriate. Further, the configuration, size, arrangement, and the like of the configuration shown in each drawing can be appropriately 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 rear 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 outer shell. As an example, the housing 14 is configured by combining an L-shaped front side panel, right side panel, bottom panel, top panel, and rear panel. As shown in FIGS. 1 to 3, the outdoor unit 1 has a plurality of storage chambers in which the inside of the housing 14 is partitioned by partition plates 8 to 10 made of sheet metal. The storage room includes four, a machine room 2, an electrical component room 3, a ventilation room 4, and a heat exchanger room 5. Although not shown in detail, the front side panel is provided with a circular outlet as an example. The outlet is covered by a fan guard. In addition, a suction port for sucking outside air into the ventilation chamber 4 is provided on the rear panel. A gallery 16 having an inflow port opened downward is attached to the suction port. The gallery 16 has, for example, a configuration in which blind-like blades are attached in parallel downward.

  The machine room 2 is partitioned from the heat exchanger room 5 by a partition plate 10, and the electrical component room 3 and the ventilation room 4 are partitioned 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, which are installed on a bottom panel of the housing 14, are connected by refrigerant piping.

  The electrical component room 3 is separated from the heat exchanger room 5 by a partition plate 10, the ventilation room 4 is partitioned by a partition plate 8, and the machine room 2 is partitioned by a partition plate 9. I have. 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 for controlling the number of revolutions of the compressor 18 and the like. 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 board 11 is attached to a partition plate 8 that separates the ventilation room 4 and the electrical component room 3 from the rear side. The control board 12 is arranged at an interval S from the power board 11. An opening is formed in the partition plate 10 at a position of the gap with an interval S between the electrical component room 3 and the heat exchanger room 5.

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

  FIG. 4 is a perspective view schematically showing a heat sink constituting an outdoor unit of the air conditioner according to the embodiment of the present invention. The heat sink 6 is a metal plate made of aluminum, copper, or the like having excellent heat dissipation properties. The heat sink 6 includes 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 is composed of The heat sink 6 is fixed to the inside of a frame 60 made of, for example, metal such as aluminum or copper, or made of resin, and is attached to a partition plate 8 that separates the electrical component room 3 from the ventilation room 4. The power board 11 of the electrical component room 3 is arranged at a position facing the panel 8 with the plate 8 therebetween.

  In the frame 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 the outside air flowing into the ventilation chamber 4. In the frame 60 of the heat sink 6, a heat sink outlet 6b is formed on a side surface facing the heat exchanger chamber 5 as an opening for discharging air taken in. That is, the heat sink 6 takes in the outside air sucked into the ventilation chamber 4 from the gallery 16 provided on the side surface of the housing 14 through the heat sink inlet 6a and discharges the outside through the heat sink outlet 6b. Since the heat sink 6 is arranged such that the heat sink inlet 6a faces the gallery 16, the outside air flowing from the gallery 16 can be easily taken into the inside, and the cooling effect can be enhanced.

  By arranging the cooling fins 61 of the heat sink 6 in a horizontal direction with an interval as shown in FIG. 4, the resistance to the entering wind can be minimized, and the cooling effect can be secured by sufficiently securing the air volume. Can be enhanced. However, the cooling fins 61 are not limited to the configuration arranged in the horizontal direction, and may have another arrangement.

  The partition plate 8 that partitions the ventilation room 4 and the electrical component room 3 is provided with a ventilation path 80 that communicates the ventilation room 4 and the electrical component room 3. The ventilation passage 80 is formed to send outside air sucked from the ventilation room 4 to the electrical component room 3 through the ventilation passage 80. The ventilation passage 80 is formed as a rectangular notch at a corner at the upper end of the partition plate 8. The reason why the ventilation passage 80 is formed at the upper end corner of the partition plate 8 is to prevent water droplets generated inside the housing 14 from entering the electrical component room 3. This is because the water droplets cannot drop through the ventilation path 80 because they drip downward by gravity. 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 room 3 through the ventilation path 80, and water droplets enter the electrical component room 3. Intrusion can be effectively prevented. The ventilation passage 80 may be formed near the upper end of the partition plate 8, and is not limited to the upper end as illustrated. The ventilation passage 80 is preferably formed near the upper end 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 air passages are arranged in parallel, and the ventilation path 80 is not limited to a rectangular notch but may be, for example, a circular shape. In short, the ventilation path 80 only needs to be able to communicate the ventilation room 4 and the electrical component room 3 and to allow the air in the ventilation room 4 to flow out to the electrical component room 3. It shall be changed as necessary and provided.

  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 room 5 houses an outdoor heat exchanger 7, an outdoor fan 15, an outdoor fan motor (not shown), and the like. Further, the heat exchanger room 5 is provided with a duct 13 communicating between the heat exchanger room 5 and the ventilation room 4 and between the heat exchanger room 5 and the electric component room 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 portion of the front side panel and the rear panel. The outdoor fan 15 is a blower configured by a propeller fan, for example, and generates air circulation for efficiently performing heat exchange. The outdoor fan 15 has a function of sucking outside air from the rear side of the outdoor unit 1 into the interior of the outdoor unit 1 and blowing out the outside air drawn into the interior of the outdoor unit 1 toward the front side of the outdoor unit 1. The outdoor fan motor is a driving unit that drives the outdoor fan 15, and is attached to a support plate provided in the heat exchanger room 5 using a fixing unit such as a screw.

  FIG. 5 is a perspective view schematically showing a duct constituting an 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 to smoothly draw air from the ventilation room 4 and the electrical component room 3 into the heat exchanger room 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 room 4 and the electrical component room 3. As shown in FIG. 5, a first duct entrance 13 a communicating with the ventilation chamber 4 and a second duct entrance 13 b communicating with the electrical component room 3 are formed on the back side of the duct 13. The duct 13 is provided as a duct outlet 13c through which the 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 inside of the duct 13 from the first duct inlet 13a, and flows out to the heat exchanger chamber 5 from the duct outlet 13c.

  On the other hand, the second duct entrance 13 b communicating with the electrical component room 3 is arranged so as to be located 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. After cooling the electric component room 3, the air that has flowed into the electric component room 3 flows into the duct 13 from the second duct inlet 13b, and flows out to the heat exchanger room 5 from the duct outlet 13c.

  Here, the flow of air in the outdoor unit 1 will be described with reference to FIGS. In the outdoor unit 1 of the air conditioner of the present embodiment, when the outdoor fan 15 housed in the heat exchanger room 5 rotates, the inside of the heat exchanger room 5 becomes negative pressure, as shown in FIG. Then, outside air flows into the ventilation chamber 4 from the gallery 16. The outside air flowing into the ventilation chamber 4 is converted into air flowing into the heat sink 6 and air flowing into the electric component room 3 through a ventilation path 80 formed in a partition plate 8 that separates the ventilation chamber 4 from the electric component room 3. Separated.

  The air flowing into the heat sink 6 flows into the inside of the frame 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 housed in the electrical component room 3 when air flows inside. The air flowing out of the heat sink outlet 6b flows into the inside of 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. You. 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 is 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 room 3 through the ventilation passage 80 formed in the partition plate 8 passes through the gap between the control board 12 and the power board 11 and is connected to the second duct entrance communicating with the heat exchanger chamber 5. From 13b, it flows into the inside of the duct 13, then turns vertically downward and flows out from the duct outlet 13c to the heat exchanger room 5. 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 is 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, the partition plate 8 that partitions the ventilation room 4 and the electrical component room 3 is provided with the ventilation path 80 that connects the ventilation room 4 and the electrical component room 3. Therefore, the outside air sucked from the ventilation room 4 can be sent to the electrical component room 3 through the ventilation path 80. Therefore, the outdoor unit 1 can sufficiently cool the electric components such as the control board 12 which needs to be cooled away from the heat sink 6 by the air flowing into the electric component room 3, and the entire electric component room 3 can be cooled. Can be lowered to prevent the electrical components from deteriorating.

  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 apart from the power board 11 by an interval S. It is arranged. Therefore, in the outdoor unit 1, the back side of the power board 11 can be directly cooled by the heat sink 6, and the front side of the power board 11 facing the control board 12 is formed by a gap between the power board 11 and the control board 12. Can be cooled by the air that has flowed into the power board 11, and the cooling effect of the power board 11 that generates the most heat can be enhanced.

  Further, in the outdoor unit 1, since the ventilation room 4, the electrical component room 3, and the machine room 2 are partitioned by the partition plate 9, the outside air flowing into the ventilation room 4 is less required to be cooled in the machine room. A large amount of air can flow into the electrical component room 3 where cooling is highly necessary without flowing into the cooling device 2, and the cooling effect can be enhanced. In addition, the outdoor unit 1 also has an effect of preventing noise since the sound generated in the machine room 2 is blocked by the partition plates 9 and 10 and is difficult to be transmitted from the louver 16 to the outside.

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

  Further, in the outdoor unit 1, since the ventilation passage 80 is provided near the upper part of the partition plate 8, even if water droplets are generated inside, the water droplets that drop downward due to gravity cannot pass through the ventilation passage 80. Therefore, the outdoor unit 1 can cool the power board 11 and the control board 12 by flowing air from the ventilation chamber 4 into the electric component room 3, and also has an effect that water enters the electric component room 3. Can be prevented.

  In the outdoor unit 1, the duct 13 communicating between the heat exchanger room 5 and the ventilation room 4 and between the heat exchanger room 5 and the electrical component room 3 has an opening surface on the heat exchanger room 5 side. Is provided downward, so that, for example, even in the event of a storm, it is possible to prevent a situation in which rain entering from the outlet of the heat exchanger room 5 enters the electric component room 3 through the duct 13. Therefore, the outdoor unit 1 can prevent the electric components housed in the electric component room 3 from being rusted, and can maintain the quality. In addition, in the case where the outdoor fan 15 is disposed below the duct 13, the outdoor unit 1 also has an effect that the wind due to the negative pressure of the outdoor fan 15 can be easily drawn into the inside.

  In addition, 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 sucks the heat from the gallery 16. The outside air can be easily taken into the inside from the opening, and the cooling effect can be enhanced.

  Moreover, since the cooling fins 61 of the heat sink 6 are arranged in the horizontal direction in the outdoor unit 1, the resistance to the wind that has entered the inside of the frame body 60 can be minimized, and the airflow can be sufficiently ensured. The effect can be enhanced.

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

  Although the present invention has been described based on the embodiment, the present invention is not limited to the configuration of the above-described embodiment. For example, a configuration in which other members other than the above-described members are stored in each storage unit may be employed. Further, the duct 13 may be provided separately for the ventilation room 4 side and the electric component room 3 side. In short, it should be noted that various changes, applications, and uses made by those skilled in the art as necessary are also included in the gist (technical range) of the present invention.

  1 outdoor unit, 2 machine room, 3 electrical 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 electric 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 Fins, 80 ventilation paths.

Claims (8)

An outdoor unit of an air conditioner having a plurality of storage rooms, each of which is partitioned by a partition plate inside a housing in which an inlet and an outlet are formed,
The storage room,
A machine room in which a refrigerant circuit having a compressor is arranged,
An electric component room in which a power board that drives the compressor, and a control board that controls the compressor,
A heat sink having cooling fins is arranged, a ventilation chamber that takes in outside air through a suction port formed in the housing,
A heat exchanger room in which a heat exchanger and a fan are arranged,
Wherein the partition plate for partitioning the ventilation chamber and the electrical component compartment, and air passage which Ru is communicated is formed between the electric component compartment and the ventilation chamber,
In the heat exchanger room, a duct communicating between the heat exchanger room and the ventilation room, and between the heat exchanger room and the electric component room has an opening surface on the heat exchanger room side. An outdoor unit of an air conditioner, which is provided facing downward . An outdoor unit of an air conditioner having a plurality of storage rooms, each of which is partitioned by a partition plate inside a housing in which an inlet and an outlet are formed,
The storage room,
A machine room in which a refrigerant circuit having a compressor is arranged,
An electric component room in which a power board that drives the compressor, and a control board that controls the compressor,
A heat sink having cooling fins is arranged, a ventilation chamber that takes in outside air through a suction port formed in the housing,
A heat exchanger room in which a heat exchanger and a fan are arranged,
A partition plate that separates the ventilation room and the electrical component room is provided with a ventilation channel that allows the ventilation room and the electrical component room to communicate with each other,
The outdoor unit of an air conditioner, wherein the heat sink is disposed inside a frame having an opening at a position facing a suction port formed in the housing. The outdoor unit of an air conditioner according to claim 1, wherein the heat sink is disposed inside a frame having an opening at a position facing a suction port formed in the housing. The said heat exchanger chamber, between said heat exchanger chamber and the ventilation chamber, and duct between Ru is communicating with the electric component chamber and the heat exchanger chamber, the opening of the heat exchanger chamber side The outdoor unit of the air conditioner according to claim 2 , wherein the outdoor unit is provided with the surface facing downward. The heat sink is disposed adjacent to the power substrate disposed in the electrical component compartment separating said partition plate,
The outdoor unit of an air conditioner according to any one of claims 1 to 4, wherein the control board is arranged at an interval from the power board. The outdoor unit of an air conditioner according to any one of claims 1 to 5 , wherein the ventilation path is formed near an upper end of a partition plate that partitions the ventilation chamber and the electrical component room. The outdoor unit of an air conditioner according to any one of claims 1 to 6 , wherein the cooling fins of the heat sink are arranged in a horizontal direction. The outdoor unit of an air conditioner according to any one of claims 1 to 7 , wherein a gallery having an inflow opening opened downward is provided at an intake port of the housing.

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