JPH07318108A - Outdoor unit for air conditioner - Google Patents

Abstract

PURPOSE:To provide an outdoor unit for an air conditioner in which defrosted water can be smoothly discharged to the exterior by preventing a drain hole from being closed due to icing of the water. CONSTITUTION:An oil return tube 10 coupled to a compressor 5 and formed substantially in a U shape is disposed at the periphery of a drain hole 7 provided at a bottom plate 2 slightly separately from a heat exchanger 6. Thus, an outdoor unit for an air conditioner in which defrosted water is prevented from being iced by the heat radiated from the tube 10 to smoothly discharge it from the hole 7 is provided.

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, and more particularly to a defrost water treatment apparatus.

[0002]

2. Description of the Related Art An outdoor unit of a conventional air conditioner has a bottom plate 12 and a partition plate 14 standing on the bottom plate 12 as shown in FIG.
Is divided into a compressor chamber and a heat exchanger chamber by a compressor, and a compressor 15 having an oil separator 19, an oil return pipe 20 and the like connected thereto is disposed in the compressor chamber, and a heat exchanger 16 is provided in the heat exchanger chamber. Etc., the bottom plate 12 is provided with a drain hole 17 at a position corresponding to the heat exchanger 16, and a water channel 18 having a slope for guiding water toward the drain hole 17. With the above structure, the defrosting water flowing down from the heat exchanger 16 during the defrosting operation is collected in the water passage 18 and discharged from the drain hole 17 to the outside. However, when returning to the heating operation, if the outdoor air temperature is below freezing, the defrost water gradually freezes to block the drain hole 17, and the defrost water cannot be discharged from the drain hole 17. There was a problem. Therefore, it is conceivable to circulate a high-temperature refrigerant in a part of the heat exchanger 16 (on the side close to the bottom plate 12), but this countermeasure has a problem that the heating capacity is lowered. Further, a countermeasure may be considered in which a heater is provided on the bottom plate 12 to prevent freezing of the defrosted water. However, this countermeasure has a problem of increased cost and increased power consumption.

[0003]

DISCLOSURE OF THE INVENTION In the present invention, it is possible to prevent defrosting water from freezing and blocking drainage holes without lowering heating capacity and increasing cost and power consumption. The purpose is to smoothly discharge from the drain hole to the outside of the outdoor unit of the air conditioner.

[0004]

The present invention has been made to solve the above-mentioned problems, and divides the inside of the housing into a compressor room and a heat exchanger room by a partition plate standing on the bottom plate. In the outdoor unit of the air conditioner, the compressor and the like are provided in the compressor chamber, the heat exchanger and the like are provided in the heat exchanger chamber, and the drainage holes are provided in the bottom plate corresponding to the heat exchanger. An oil return pipe connecting the discharge side and the suction side of the compressor is arranged around a drain hole provided in the bottom plate. Further, the drainage hole is provided at a small distance from the heat exchanger. Further, the oil return pipe is formed in a substantially U shape along the circumference of the drainage port. Further, the bottom plate is provided with a water channel having a slope toward the drain hole.

[0005]

According to the above construction, the defrosted water is guided toward the drain hole by the water channel, and the oil return pipe arranged around the drainage hole dissipates heat to the outside without freezing the defrosted water. It becomes the outdoor unit of the air conditioner to be discharged.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1, 2 and 3, 1 is a casing of an outdoor unit of an air conditioner, 2 is a bottom plate on which a compressor, heat exchanger, etc. are mounted, and 3 protects the compressor, heat exchanger, etc. It is the outer torso. A partition 4 is erected on the bottom plate 2 and divides the bottom plate 2 into a compressor chamber and a heat exchanger chamber, and a recess (not shown) is provided at the lower end to prevent contact with an oil return pipe described later. The plates and 5 are placed in the same compressor room, and the oil separator 9
The compressor 6 connected to the oil return pipe 10 and the like is a heat exchanger mounted in the same heat exchanger chamber. A drain hole 7 is provided in the bottom plate 2 with a slight clearance from the heat exchanger 6, and a water channel 8 having a slope from a position corresponding to the heat exchanger 6 toward the drain hole 7 is formed. . The oil return pipe 10
Is formed in a substantially U shape, and the water channel 8 is formed in the opening of the same shape.
Is disposed around the drainage hole 7. 11 is a four-way valve, 12 is an expansion valve, and 13 is an indoor heat exchanger. With the above configuration, as shown in FIG. 1, the refrigerant discharged from the discharge side of the compressor 5 is the oil of the compressor 5 (refrigerator oil).
From the oil separator 9 provided for the recovery of the above, one side flows into the suction side of the compressor 5 through the oil return pipe 10 through which the high-temperature and high-pressure oil and the refrigerant flow, and the other side flows into the four-way valve 11. , From the same four-way valve 11 into the indoor heat exchanger 13, from the same indoor heat exchanger 13 through the expansion valve 12 into the outdoor heat exchanger 6, from the same outdoor heat exchanger 6 to the four-way valve 11 After that, a refrigeration cycle that reaches the suction side of the compressor 5 is configured.

In the above structure, during the defrosting operation, the defrosting water flowing down from the heat exchanger 6 is collected in the water passage 8.
The water is discharged from the drain hole 7 to the outside. When returning to the heating operation, even when the outdoor air temperature is below freezing, the high-temperature and high-pressure oil and the refrigerant flow, and the oil return pipe 10 disposed around the drain hole 7 dissipates the heat to remove the heat. The defrosted water can be smoothly discharged from the drainage hole 6 to the outside without the frosted water being frozen and therefore not blocking the drainage hole 7.

[0008]

As described above, according to the present invention, it is possible to prevent defrost water from freezing and blocking drainage holes without lowering the heating capacity and without increasing the cost and power consumption. As a result, the outdoor unit of the air conditioner can smoothly discharge the defrosted water from the drain hole to the outside.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle diagram of an air conditioner according to the present invention.

FIG. 2 is a perspective view of a main part of the outdoor unit according to the present invention.

FIG. 3 is a sectional view of the outdoor unit according to the present invention taken along the line AA shown in FIG.

FIG. 4 is a perspective view of a main part of an outdoor unit according to a conventional example.

[Explanation of symbols]

 1 Case 2 Bottom Plate 3 Outer Body 4 Partition Plate 5 Compressor 6 Heat Exchanger 7 Drain Hole 8 Water Channel 9 Oil Separator 10 Oil Return Pipe 11 Four Way Valve 12 Expansion Valve 13 Indoor Heat Exchanger

Claims (4)

[Claims] 1. A casing is divided into a compressor chamber and a heat exchanger chamber by a partition plate which is erected on a bottom plate. The compressor chamber and the heat exchanger chamber are provided in the compressor chamber and the heat exchanger chamber. In the outdoor unit of the air conditioner in which the bottom plate corresponding to the heat exchanger is provided with drainage holes, the bottom plate is provided with an oil return pipe connecting the discharge side and the suction side of the compressor. An outdoor unit for an air conditioner, which is arranged around a drain hole. 2. The outdoor unit for an air conditioner according to claim 1, wherein the drain hole is provided with a small clearance from the heat exchanger. 3. The outdoor unit for an air conditioner according to claim 1, wherein the oil return pipe is formed in a substantially U shape along the circumference of the drainage port. 4. The outdoor unit for an air conditioner according to claim 1, wherein the bottom plate is provided with a water channel having a slope toward the drain hole.