JP2012137229A - Air conditioner outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner outdoor unit that improves cooling effect.SOLUTION: The air conditioner outdoor unit includes: an outdoor heat exchanger for providing heat exchange between a refrigerant and atmosphere; a blower fan for sending air to the outdoor heat exchanger; electric equipment having an electronic component inside which generates heat upon operating; an intake hole below the electric equipment; a vent hole above the electric equipment; and an exhaust duct connected to the vent hole. An opening end of the exhaust duct is extended to a negative pressure region upon driving of the blower fan. As a result, air flows to accelerate exhaust when the blower fan rotates. Accordingly, much air is taken in from the intake hole.

Description

  The present invention relates to cooling of an electronic control device provided in an outdoor unit of an air conditioner.

  In an outdoor unit of a conventional air conditioner, a compressor that compresses refrigerant, a pipe and a heat exchanger that send the compressed refrigerant to the heat exchanger, and wind to the heat exchanger to effectively perform the heat exchange An electronic control unit equipped with a blower fan to be sent and an inverter circuit that controls the rotational speed of the compressor motor by converting the commercial AC power supply into direct current using a rectifier, and a noise filter circuit that suppresses noise from the inverter circuit I have.

  In addition, since high current is applied to the inverter circuit and noise filter circuit, the circuit components generate heat and become hot during operation, and the electronic control unit is often located above the compressor during operation. Due to the heat generated by the compressor and the heat generated from the circuit component, the temperature around the electronic component becomes high, which causes various problems such as a failure of the electronic component in a short period of time.

  For this reason, an air inlet and an exhaust port are provided in the storage box containing the electronic control unit, and the exhaust port is provided in the outdoor unit fan circuit on the lower surface of the storage box, so that air flows into the storage box of the electronic control unit. Some of them cool the electronic control unit (see, for example, Patent Document 1).

JP 2004-301477 A

  However, in the above-described conventional configuration, the exhaust port is provided in the outdoor unit fan circuit so that air is taken into the box containing the electronic control unit from the intake port to cool the electronic component. There is a problem that the air taken in from the suction port is not sufficient and the cooling effect is not sufficient only by providing the port in the outdoor unit fan circuit.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide an outdoor unit for an air conditioner that further improves the cooling effect.

  In order to solve the conventional problems, an outdoor unit of an air conditioner according to the present invention includes an outdoor heat exchanger that exchanges heat between the refrigerant and the atmosphere, a blower fan that blows air to the outdoor heat exchanger, and heat generation during operation. An electronic part having an electronic component to be included therein, a suction hole in a lower part of the electrical part, a vent hole in an upper part of the electrical part, and an exhaust duct connected to the vent hole, when the blower fan is driven By extending the open end of the exhaust duct to the negative pressure region, an air flow is generated when the blower fan rotates, and exhaust is promoted, so that more air is taken in from the suction hole, which is sufficient for cooling the electronic components. Air can be circulated, and a ventilation hole is provided in the upper part of the electrical component. Even when the blower fan is stopped, the air can be circulated by using the rising action of the generated air. Suppresses the rise in ambient temperature Rukoto can.

The present invention can provide an outdoor unit of an air conditioner that improves the cooling effect of the electrical component.

The exploded perspective view of the outdoor unit of the air conditioner in Embodiment 1 of this invention Sectional drawing of the principal part of the outdoor unit of the air conditioner in Embodiment 1 Exploded perspective view of a conventional air conditioner outdoor unit Cross-sectional view of the main part of an outdoor unit of a conventional air conditioner

  An outdoor unit of an air conditioner according to a first aspect of the present invention includes an outdoor heat exchanger that exchanges heat between the refrigerant and the atmosphere, a blower fan that blows air to the outdoor heat exchanger, and an electronic component that internally includes electronic components that generate heat during operation. A suction hole in the lower part of the electrical part, a ventilation hole in the upper part of the electrical part, and an exhaust duct connected to the ventilation hole, and opening the exhaust duct to the negative pressure region when the blower fan is driven By extending the end, air flow is generated at the time of rotation of the blower fan to promote exhaust, so that more air can be circulated by taking in more air from the suction hole, Furthermore, a vent hole is provided in the upper part of the electrical part, and even when the blower fan is stopped, the air can be circulated by using the rising action of the generated air, and the rise in the ambient temperature of the electrical part is suppressed. Can do.

  In the outdoor unit of the air conditioner of the second invention, particularly in the first invention, the opening end of the exhaust duct is located below the vent hole, thereby preventing the electrical component from getting wet due to rain blowing. I can do it.

  An outdoor unit for an air conditioner according to a third aspect of the invention is the first or second aspect of the invention, particularly in the first or second aspect, wherein the exhaust duct includes a first partition plate and a vent hole includes a second partition plate. Is disposed downward from the upper end of the exhaust duct, the second partition plate is disposed upward from the lower end of the vent hole, and the first partition plate is disposed in the flow path from the vent hole to the open end of the exhaust duct. By providing an overlap between the projection surfaces of the second partition plate and the second partition plate, it is possible to prevent the electrical component from getting wet due to the blowing of rain.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of an outdoor unit of an air conditioner according to Embodiment 1 of the present invention, and FIG. 2 is a top view of the outdoor unit of the air conditioner according to Embodiment 1 of the present invention.

  1 and 2, the outdoor unit of the air conditioner of the present embodiment includes a compressor 10 that compresses a refrigerant, an outdoor heat exchanger 12 that exchanges heat between the atmosphere and the refrigerant, and an outdoor heat exchanger 12. It has the ventilation fan 3 which ventilates to heat and promotes heat exchange.

  Further, the ventilation control plate 4 for controlling the flow of air, the fan motor 13 for rotating the blower fan, the blower circuit 14 through which the wind generated when the blower fan 3 is driven, the blower circuit 14 and the compressor 10. A partition plate 15 is provided for partitioning a space for arranging the.

Furthermore, an electrical component 11 that controls each component is disposed above the compressor 10. The electrical component 11 includes a transistor module 6 for energizing an operating current flowing through the compressor 10 by inverter control, an electrolytic capacitor 7 for storing a DC voltage generated by rectifying an AC power supply, and electric noise generated by inverter control. A printed circuit board on which a noise filter 8 or the like to be reduced is disposed, and each electric circuit is connected using a conductor pattern or a lead wire. Although not shown, some of them also have an input / output circuit for driving various sensors and electromagnetic valves, and a microcomputer control circuit.

  Further, since the transistor module 6 generates a large amount of heat during operation, a heat sink 5 is attached, and a part of the heat sink 5 protrudes toward the blower circuit 14. Therefore, although forced cooling is performed by the wind flowing through the blower circuit 14, the electrolytic capacitor 7 and the noise filter 8, which are components that generate heat during operation, like the transistor module 6, need to be cooled by the air flowing through the electrical component 11.

  Therefore, in the present embodiment, the suction hole 9 is provided in the lower part of the electrical part 11, and the ventilation hole 16 is provided in the upper part of the electrical part 11. Further, the exhaust duct 1 is connected to the vent hole 16, and the open end 2 of the exhaust duct 1 is provided in a negative pressure region generated in the blower circuit 14.

  With this configuration, when the blower fan 3 rotates, the flow of air from the suction hole 9 to the ventilation hole 16 is promoted, and the cooling effect of the electrical component 11 can be enhanced.

  Furthermore, even when the blower fan 3 is stopped, an air flow can be generated in the electrical component 11 using the rising action of the generated air, and the cooling effect can be enhanced.

(Embodiment 2)
FIG. 3 is an enlarged view of a main part of the outdoor unit of the air conditioner according to Embodiment 2 of the present invention. As shown in FIG. 3, the air flow of the exhaust duct 1 is formed at a position one step lower than the position of the vent hole 16.

  That is, the opening end 2 of the exhaust duct 1 is positioned below the ventilation hole 16, so that it is possible to prevent water from entering the electrical component 11 due to blowing that occurs during a storm.

(Embodiment 3)
FIG. 4 is an enlarged view of a main part of an outdoor unit of an air conditioner according to Embodiment 3 of the present invention. As shown in FIG. 4, in the exhaust duct 1, the first partition plate 31 extends downward from the upper end of the exhaust duct 1, and the second partition plate 32 extends upward from the lower end of the vent hole 16. It is stretched toward.

  When the length from the upper end to the lower end of the exhaust duct is set to L, the length of the first partition plate 31 is at least half of the length L, and the length of the second partition plate 32 is At least half of the length L.

  With this configuration, the projection surfaces of the first partition plate 31 and the second partition plate 32 overlap each other in the flow path from the vent hole 16 to the opening end of the exhaust duct, and the exhaust duct. It becomes an obstacle in 1. As a result, it is possible to prevent the electrical component 11 from being wetted by rain. Note that the projection plane refers to the direction indicated by the arrow in FIG. 4, and the projection planes overlap when the first partition plate 31 or the second partition plate 32 is seen when looking into the opening end 2 direction from the vent hole 16. It refers to a state in which only one of them can be visually observed and the open end 2 cannot be confirmed.

  The outdoor unit of the air conditioner according to the present invention can also be applied to an outdoor unit of a heat pump type hot water heater that incorporates a heat exchanger or a blower.

DESCRIPTION OF SYMBOLS 1 Exhaust duct 2 Open end 3 Blower fan 9 Suction hole 10 Compressor 11 Electrical part 12 Outdoor heat exchanger 14 Blower circuit 16 Vent hole

Claims (3)

An outdoor heat exchanger that exchanges heat between the refrigerant and the atmosphere, a blower fan that blows air to the outdoor heat exchanger, an electrical component that includes electronic components that generate heat during operation, and a suction hole in a lower portion of the electrical component A vent hole and an exhaust duct connected to the vent hole in the upper part of the electrical component, and the open end of the exhaust duct is extended to a negative pressure region when the blower fan is driven. Air conditioner outdoor unit. The air conditioner according to claim 1, wherein an opening end of the exhaust duct is positioned below the vent hole. The exhaust duct includes a first partition plate and the vent hole has a second partition plate, and the first partition plate is disposed downward from an upper end of the exhaust duct, and the second partition plate Is arranged upward from the lower end of the vent hole, and overlaps the projection surface of the first partition plate and the second partition plate in the flow path from the vent hole to the open end of the exhaust duct. The outdoor unit for an air conditioner according to claim 1 or 2, wherein the outdoor unit is provided.