JPH0894129A - Outdoor unit for air conditioner - Google Patents

Abstract

PURPOSE: To prevent the temperature of a power transistor for an inverter from being abnormally raised even when the outdoor air temperature sucked to an indoor unit becomes high at the time of cooling by an air conditioner. CONSTITUTION: A drain passage 15 is provided in a cooling fin body 9. Drain generated from an indoor unit is introduced into the passage 15 via a drain hose 20, a drain intake socket 13 and a hose 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an air conditioner.

[0002]

2. Description of the Related Art An example of a conventional outdoor unit is shown in FIG. 3, where (A) is a horizontal sectional view of the outdoor unit, (B) is an external perspective view of a control box, and (C) is C of (B). It is an arrow line view which follows the C line. As shown in FIG. 1 (A), the device casing 1 of the outdoor unit is divided into left and right by a partition plate 4, a heat exchanger chamber 11 is formed on the left side of the partition plate 4, and a machine chamber 10 is formed on the right side. Has been done.

A heat exchanger 2 and a propeller fan 3 are arranged in the heat exchanger chamber 11. Control box 7 in machine room 10
Further, a compressor, an expansion valve and the like (not shown) are arranged.

A power transistor 8 for an inverter is housed in the left side of the control box 7, and a cooling fin main body 9 is fixed to the power transistor 8 as shown in FIGS. 2 (B) and 2 (C). It is fastened at 17 and is in contact. The fins 16 of the cooling fin main body 9 project into the heat exchanger chamber 11.

During operation of the air conditioner, the refrigerant circulates in the heat exchanger 2 and the propeller fan 3 is driven. Then, the outside air sucked through the air suction port 5 exchanges heat with the refrigerant in the process of passing through the heat exchanger 2 to raise or lower the temperature,
It is urged by the propeller fan 3 and discharged from the air outlet 6. At that time, the fins 16 are cooled by the air flowing through the heat exchanger chamber 11 to prevent the temperature rise of the power transistor 8.

[0006]

In the conventional air conditioner described above, when the temperature of the outside air taken in through the air intake port 5 becomes high during the cooling operation, the cooling effect of the fins 16 decreases, which is accompanied by this. The temperature of the power transistor 8 rises abnormally, and as a result, the operation of the air conditioner may automatically stop.

[0007]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above problems, and its gist is to provide a cooling fin main body in a power transistor for an inverter housed in a control box. In an outdoor unit of an air conditioner additionally provided with the fins of the cooling fin main body protruding into the heat exchanger chamber, a drain water passage is provided in the cooling fin main body, and an indoor unit is generated in the drain water passage. It is an outdoor unit of an air conditioner characterized by having a drain water introduction system passage for guiding drain water.

A plurality of drain water passages can be provided.

A drain hose connecting the drain water introduction system path between the indoor unit and the drain water intake socket of the outdoor unit, and a hose connecting the drain water intake socket and the drain water passage of the cooling fin body. It can be configured by and.

[0010]

According to the present invention, since the drain water generated in the indoor unit enters the drain water passage through the drain water introducing system passage and flows through the drain water passage, the cooling fin body is provided. And heat it to cool it.
As a result, the cooling effect of the cooling fin body is increased, and an abnormal rise in the temperature of the power transistor is prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. 1, where (A) is a horizontal sectional view of an outdoor unit, (B) is a perspective view of a control box, and (C).
FIG. 6B is a sectional view taken along line CC of FIG. As shown in FIG. 1 (C), the cooling fin body 9 is provided with a drain water passage 15 which vertically penetrates the cooling fin body 9. A socket 14 is provided on the upper surface of the cooling fin body 9 so as to communicate with the upper end inlet of the drain water passage 15, and a socket 18 is provided on the lower surface of the cooling fin body 9 so as to communicate with the lower end outlet of the drain water passage 15. It is provided.

A drain pipe 19 is connected to the socket 18, and the drain pipe 19 penetrates the bottom plate of the container casing 1 and is guided to the outside.

As shown in FIG. 1 (A), a drain water intake socket 13 is provided on the rear surface of the container case 1. The inner end of the drain water intake socket 13 and the socket 14 are connected by a hose 12. Has been done.

A drain hose 20 is connected to the outer end of the drain water intake socket 13, and the other end of the drain hose 20 is connected to a drain pan (not shown) incorporated in the indoor unit 21 as shown in FIG. It is connected. Other configurations are shown in FIG.
It is similar to the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

The drain water generated in the indoor unit 21 of the air conditioner then flows into the drain water passage 15 through the drain water introducing system passage including the drain hose 20, the drain water intake socket 13, and the hose 12. After cooling the cooling fin body 9 in the process of flowing through the drain water passage 15, the cooling fin body 9 is discharged through the drain pipe 19.

Thus, during the cooling operation of the air conditioner, the power transistor 8 can be sufficiently cooled even when the temperature of the outside air taken into the heat exchanger chamber 11 becomes high.
It is possible to prevent the air conditioner from stopping due to an abnormal increase in the temperature of the power transistor 8.

In the illustrated embodiment, the drain water passage 15
Although only one is shown, it is desirable to provide multiple.

[0018]

According to the present invention, when the drain water generated in the indoor unit flows through the drain water passage, it exchanges heat with the cooling fin body to cool it. Therefore, since the fins can be cooled by the air flowing through the heat exchanger chamber and the cooling fin body can be cooled by the drain water at the same time, the temperature of the power transistor can be prevented from abnormally rising. As a result, the cooling operation of the air conditioner can be prevented. At this time, it is possible to prevent the air conditioner from stopping due to an abnormal rise in the temperature of the power transistor.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a horizontal sectional view of an outdoor unit, (B) is a perspective view of a control box, and (C) is a C of (B).
It is sectional drawing which follows the C line.

FIG. 2 is a schematic side view showing a connection state between the outdoor unit and the indoor unit according to the above embodiment.

FIG. 3 shows an outdoor unit of a conventional air conditioner, (A)
Is a horizontal sectional view of the outdoor unit, (B) is a perspective view of the control box,
(C) is a view taken along the line CC of (B).

[Explanation of symbols]

 1 Instrument case 10 Machine room 7 Control box 11 Heat exchanger room 2 Heat exchanger 3 Fan 8 Power transistor 9 Cooling fin body 16 Fin 15 Drain water passage 21 Indoor unit 20 Drain hose 13 Drain water intake socket 12 Hose

Claims (3)

[Claims] 1. An outdoor unit of an air conditioner, wherein a cooling fin body is attached to an inverter power transistor housed in a control box, and the fin of the cooling fin body is projected into a heat exchanger chamber in the outdoor unit of the air conditioner. An outdoor unit for an air conditioner, characterized in that a drain water passage is provided in the fin body, and a drain water introduction system passage for guiding the drain water generated in the indoor unit is provided in the drain water passage. 2. The outdoor unit for an air conditioner according to claim 1, wherein a plurality of the drain water passages are provided. 3. A drain hose connecting the drain water introduction system path between the indoor unit and the drain water intake socket of the outdoor unit, and a connection between the drain water intake socket and the drain water passage of the cooling fin body. The outdoor unit of the air conditioner according to claim 1, wherein the outdoor unit is formed of a hose.