JPH07146034A - Refrigerator - Google Patents

Abstract

PURPOSE:To prevent such defects that sliding parts in a compression element are worn out due to liquid return caused by fluctuations of a load of a refrigerator and the performance of a compressor is deteriorated. CONSTITUTION:A refrigerator is provided with an accumulator 31 constituted of a vessel 33, a flow-in tube 32 connected to the upper part of the vessel 33, a flow-out tube 34 inserted into the vessel 33 through the lower part thereof and having an opening hole 34a at the root of the flow-out tube, a dividing plate 35 having an opening 35a and allowing the flow-out tube to penetrate therethrough, and an evaporation promoting part 38 provided on the upper face of the dividing plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating device for preventing liquid from returning to a compressor such as a refrigerator.

[0002]

2. Description of the Related Art A conventional refrigeration system will be described below with reference to the drawings. FIG. 2 is a cross-sectional view of the horizontal rotary compressor disclosed in JP-A-62-3095, and FIG. 3 is a piping diagram of a refrigeration system to which the horizontal rotary compressor is applied. Reference numeral 1 denotes a substantially cylindrical compressor that is long in the lateral direction, and houses an electric element 4 composed of a stator 2 and a rotor 3, and a compression element 5 driven by the electric element 4. Lubricating oil 6 is accumulated below the compressor 1.

The compression element comprises a cylinder 7, a main side housing 8 and a sub side housing 9, which form a compression chamber 10 which is in close contact with both sides of the cylinder 7. Reference numeral 14 is a crankshaft connected to the rotor 3 and has an eccentric portion 15. 1
Reference numeral 1 denotes a roller fitted in the eccentric portion 15, which is installed inside the compression chamber 10. 12 is a vane, and the roller 13 is provided by a spring 13.
The compression chamber 10 is made to have a high pressure and a low pressure by being pressed against. 18 is an oil supply pipe, one end of which penetrates the lubricating oil 6,
A coil spring 19 fixed to the crankshaft 14 is arranged inside. Reference numeral 20 is a discharge valve provided in the sub-side housing. Reference numeral 17 denotes a discharge cover, and the cup-shaped portion of the discharge cover 17 is a discharge chamber 1
It is formed as 6.

The oil supply pipe 18 is integrated with the discharge cover 17, and is lightly press-fitted and fixed to the convex portion 9a of the auxiliary side housing 9. Reference numeral 21 is a suction pipe that penetrates the compressor 1, is located above the lubricating oil 6, and is press-fitted into a through hole 17a that communicates with the compression chamber 10 of the cylinder 7 provided in the auxiliary side housing 9.

A condenser 23 is connected to the discharge pipe 22, and is sequentially connected in an annular shape by a decompressor 24 composed of a capillary tube, an evaporator 25, and a connecting pipe 26 connecting the evaporator 25 and the suction pipe 21, and An accumulator 27 for relaxing liquid return is provided from the compressor of the connecting pipe 26, and an inflow pipe 27a, an outflow pipe 27b, an oil return opening hole 27c provided at the root of the outflow pipe, and a liquid sump 27d. And constitutes a refrigeration system.

The operation of the refrigerating apparatus having the above structure will be described below. The rotation of the rotor 3 that constitutes the electric element 4 is transmitted to the crankshaft 14 and imparts a rotational motion to the roller fitted in the eccentric portion 15 of the crankshaft 14, thereby causing the suction pipe 21 to rotate.
The more drawn refrigerant is compressed in the compression chamber 10.

Further, the rotation of the rotor 3 depends on the crankshaft 14
The coil spring 19 fixed to one end of the compressor is also given a rotational movement, and the lubricating oil 6 accumulated below the compressor 1 is transferred to the crankshaft 14 side by the rotational centrifugal force to supply the oil to the compression element 5. Is going.

The refrigerant compressed in the compression chamber 10 is silenced by being discharged into the discharge chamber 16 from the discharge valve 20 provided in the auxiliary side housing 9, and is discharged from the discharge cover 17 into the compressor 1. . The discharged gas refrigerant is liquefied in the condenser 23 through the discharge pipe 22,
It is decompressed while passing through a decompressor 24 composed of a capillary tube or the like, evaporated at a predetermined temperature in an evaporator 25, an excess refrigerant liquid component is absorbed by an accumulator 27, and an oil component is an oil return opening hole. By repeating the cycle of returning from 27c to the compressor side again, the cooling action is continued.

[0009]

However, in the above-mentioned conventional structure, the suction pipe 21 is provided in the through hole 17a which is formed in the main side housing 8 and the sub side housing 9 so as to be in close contact with both sides of the cylinder 7 and communicates with the compression chamber 10. Depending on the refrigeration system to be applied, the load fluctuation is large, initial startup during normal ON-OFF operation, or after defrosting to remove the frost adhering to the evaporator 25 during operation, because it is press-fitted. The liquid refrigerant may return at the time of starting.

However, in the structure of the accumulator 27, the oil and the liquid are not sufficiently separated, and not only the oil but also the liquid is returned to the compressor side from the opening hole 27c for returning the oil,
Although the liquid refrigerant is prevented from being sucked into the suction pipe 21, it is difficult to prevent it sufficiently. Therefore, the liquid refrigerant is directly sucked into the compression chamber 10 via the suction pipe 21, the lubricating oil in the compression chamber 10 is washed with the liquid refrigerant, and the sliding parts of the roller 11 and the vane 12 are worn, It had the drawback of impairing performance.

An object of the present invention is to solve the above-mentioned problems, and an object thereof is to provide a refrigerating apparatus which does not wear the sliding parts in the compression element due to the liquid refrigerant returning caused by the load fluctuation.

[0012]

In order to achieve this object, a refrigerating apparatus of the present invention comprises an outflow pipe having an opening hole at its root, a partition plate having an opening portion and penetrating the outflow pipe, and an upper portion of the partition plate. In addition, an accumulator provided with an evaporation promoting section is provided.

[0013]

According to the present invention, the accumulator is divided into the upper and lower chambers by the partition plate, that is, the liquid storage chamber and the oil storage chamber, and the liquid refrigerant passes through the evaporation promoting portion provided on the upper portion of the partition plate. By promoting the evaporation during the operation, only the oil is likely to be accumulated in the oil sump chamber.

As a result, only the oil component can be returned from the oil return opening hole, and the refrigerant gas component can be returned from the outflow pipe opening to the liquid reservoir chamber, so that the liquid refrigerant can be easily evaporated before it is introduced into the compression chamber. Therefore, it is possible to prevent the disadvantage that the lubricating oil in the compression chamber is washed with the liquid refrigerant, the sliding parts are worn and the performance of the compressor is impaired.

[0015]

Embodiments of the refrigerating apparatus according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a refrigeration cycle piping diagram according to an embodiment of the present invention. The inflow pipe 32 is provided in the accumulator 31.
Is inserted in the upper part of the container 33, and the outflow pipe 34 is inserted in the lower part of the container 33. The container 33 is divided into two chambers, a liquid reservoir chamber 36 and an oil reservoir chamber 37, by a partition plate 35 provided so as to penetrate the outflow pipe 34.

The partition plate 35 has an opening 35a. The upstream side of the partition plate 35 is an evaporation promoting portion 38 made of a porous material having open cells. One end of the outflow pipe 34 is opened in the liquid storage chamber 36, and an opening hole 34a is provided at the bottom of the oil storage chamber 37.

The operation will be described below. The gas refrigerant discharged from the compressor 1 is liquefied in the condenser 23 through the discharge pipe 22 and is depressurized while passing through the pressure reducer 24 such as a capillary tube, and is evaporated in the evaporator 25 at a predetermined temperature. By repeating the cycle of returning to the suction pipe 21 again,
The cooling action is continued.

In the case of large load fluctuations, or normal ON-O
When the liquid refrigerant returns at the initial start-up during FF operation or after start-up after defrosting to remove the frost adhering to the evaporator 25 during operation, when the liquid refrigerant returns from the inflow pipe 32 of the accumulator 31 While gradually passing through the evaporation promoting portion 38 made of a porous material having open cells, the oil component contained in the refrigerant flows into the oil sump chamber 37 through the opening 35a of the partition plate 35.

The evaporated gas refrigerant flows from the outflow pipe 34 having one end opened in the liquid storage chamber 36 to the suction pipe 21, and the oil accumulated in the oil storage chamber 37 by a predetermined amount is opened in the outflow pipe 34.
To the suction pipe 21, and then returns to the compressor 1.

As described above, in the refrigerating apparatus of this embodiment, the accumulator 31 is provided with the evaporation promoting section 38,
The liquid refrigerant is prevented from returning to the compressor 1.

[0022]

As described above, according to the present invention, a compressor, a condenser, a decompressor, an evaporator and an accumulator are sequentially connected in an annular shape, and the accumulator is connected to a container and an upper part of the container. Since it consists of an inflow pipe, an outflow pipe that is inserted from the bottom of the container and has an opening hole at the root, a partition plate that has an opening and penetrates the outflow pipe, and an evaporation promoting unit that is provided above the partition plate. It is possible to prevent the liquid from returning to the compressor,
It is possible to eliminate the disadvantage that the lubricating oil in the sliding portion in the compressor is washed with the liquid refrigerant, the sliding parts are worn, and the performance of the compressor is impaired.

[Brief description of drawings]

FIG. 1 is a schematic refrigeration cycle diagram of a refrigeration apparatus according to the present invention.

FIG. 2 is a sectional view of a conventional rotary compressor.

FIG. 3 is a schematic refrigeration cycle diagram of a conventional refrigeration system.

[Explanation of symbols]

 1 Compressor 23 Condenser 24 Decompressor 25 Evaporator 31 Accumulator 32 Inflow pipe 33 Container 34 Outflow pipe 34a Opening hole 35 Partition plate 35a Opening 38 Evaporation promoting part

Claims (1)

[Claims] 1. A compressor, a condenser, a decompressor, an evaporator, and an accumulator are sequentially connected in an annular shape, the accumulator is a container, and an inflow pipe connected to an upper portion of the container.
A refrigeration system comprising an outflow pipe which is inserted from the bottom of a container and has an opening hole at the root, a partition plate which has an opening and penetrates the outflow pipe, and an evaporation promoting unit which is provided above the partition plate.