JPH1026443A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize a violent agitation phenomenon of a refrigerator oil during the starting time of a compressor and reduce the generation of abnormal sound by providing an accumulator flow-out pipe on the upper part of an accumulator. SOLUTION: When a compressor 1 is stopped, a refrigerator oil 11 is accumulated in an accumulator 8 by flowing backward in a suction pipe 10. As a result, the refrigerator oil 11 is accumulated in the lower part of the accumulator 8 while gasified refrigerant is accumulated in the upper part thereof. Then, when starting the compressor 1, the gasified refrigerant in the upper part of the accumulator 8 is absorbed into the compressor 1 at first by way of a flow- out pipe 8 connected to the suction pipe 10 and the accumulator 8 and then the refrigerator oil accumulated in the lower part is absorbed. Owing to this construction, the refrigerator oil 11 accumulated in the accumulator 8 can return smoothly to the compressor 1 when starting the compressor 1, which makes it possible to relax the generation of abnormal sound by allowing the refrigerator oil 11 to be agitated violently in the accumulator 8 and thereby prevent the generation of a drawback that the abnormal sound is turned to a noise which may damage the quality of a merchandise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an accumulator provided in the vicinity of a horizontal rotary compressor such as a refrigerator or the like, in which the accumulator is started when the compressor is started by refrigerating machine oil flowing backward from the compressor when the compressor is stopped. TECHNICAL FIELD The present invention relates to a refrigeration apparatus for preventing an abnormal sound from being generated.

[0002]

2. Description of the Related Art A conventional refrigeration system will be described below with reference to the drawings. FIG. 3 is a schematic piping diagram of a refrigeration system to which a horizontal rotary compressor disclosed in Japanese Patent Application Laid-Open No. 62-13095 is applied, and FIG. 4 is a cross-sectional view of the horizontal rotary compressor.

[0003] Reference numeral 1 denotes a substantially cylindrical compressor which is long in the lateral direction, and an electric element 16 comprising a stator 14 and a rotor 15;
The compression element 17 driven by the electric element 16 is housed. Numeral 11 denotes lubricating oil which is accumulated below the compressor 1.

The compression element is tightly attached to both sides of the cylinder 18 by a cylinder 18, a main side housing 19 and a sub side housing 20 to form a compression chamber 22. 26 is a crankshaft coupled to the rotor 15 and has an eccentric portion 27.

Reference numeral 23 denotes a roller fitted on the eccentric part 27,
It is housed in the compression chamber 22. Reference numeral 24 denotes a vane which is pressed against the roller 23 by a spring 25 to partition the compression chamber 22 into high and low pressures. Numeral 31 denotes an oil supply pipe, one end of which penetrates into the lubricating oil 11, and a coil spring 32 fixed to the crankshaft 26 is disposed therein.

Reference numeral 33 denotes a discharge valve provided on the sub side housing 20. Reference numeral 29 denotes a discharge cover, and a cup-shaped portion of the discharge cover 29 is formed as a discharge chamber 28.

The oil supply pipe 31 is integrated with the discharge cover 29 and is press-fitted and fixed to the convex portion 21 of the sub side housing 20. Reference numeral 10 denotes a suction pipe that penetrates through the compressor 1, is located above the lubricating oil 11, and is press-fitted into a through-hole 30 that communicates with the compression chamber 22 of the cylinder 18 provided in the sub-side housing 20.

The discharge pipe 2 is connected with a condenser 3, a decompressor 4 comprising a capillary tube, etc., an evaporator 5, and a return pipe 6. Liquid is returned to the compressor 1 between the return pipe 6 and the suction pipe 10. An accumulator 8 for alleviating the pressure is provided, and an inflow pipe 7 is provided between the return pipe 6 and the accumulator 8, and an intake pipe 10 is provided.
And the accumulator 8 are connected by an outflow pipe 9 to form a refrigerating apparatus.

[0009] The operation of the refrigeration system configured as described above will be described below. The rotation of the rotor 15 constituting the electric element 16 is transmitted to the crankshaft 26 to give a rotational motion to the roller 23 fitted to the eccentric part 27, and the refrigerant sucked from the suction pipe 10 is compressed in the compression chamber 22. I do.

The rotation of the rotor 15 is controlled by the rotation of the crankshaft 2.
The lubricating oil 11 stored below the compressor 1 is also transferred to the crankshaft 26 by the rotational centrifugal force to supply lubricating oil 11 to the compression element 17. It is carried out.

The refrigerant compressed in the compression chamber 22 is discharged from a discharge valve 33 provided in the sub-side housing 20 into the discharge chamber 28 to silence the sound, and is discharged from the discharge cover 29 into the compressor 1. . The released gas refrigerant passes through the discharge pipe 2, is liquefied in the condenser 3, is decompressed while passing through the decompressor 4 composed of a capillary tube or the like, evaporates at a predetermined temperature in the evaporator 5, The refrigerant liquid is absorbed by the accumulator 8, and the oil contained in the refrigerant liquid repeats a cycle of returning to the compressor 1 from the oil return opening 13 again, thereby continuing the cooling action.

[0012]

However, in the above-described conventional structure, the suction pipe 10 is provided in the through hole 30 which is formed by the main side housing 19 and the sub side housing 20 and is in close contact with both sides of the cylinder 18 and communicates with the compression chamber 22. Since it is press-fitted, an assembly clearance between the sliding parts of the rollers 23 and the vanes 24 and the compression chamber 22 formed in close contact with both sides of the cylinder 18 by the main side housing 19 and the sub side housing 20 forms a passage. As a result, a phenomenon occurs in which the refrigerating machine oil 11 flows backward through the suction pipe 10 and accumulates in the accumulator 8 due to the high / low pressure difference when the compressor 1 is stopped.

This phenomenon is more likely to occur as the clearance on assembly increases and the pressure of the applied refrigerant increases.

The refrigerating machine oil 11 accumulated in the accumulator 8 is sucked from the tip of the outflow pipe 9 together with the vaporized gas refrigerant inside the accumulator 8 due to a rapid pressure drop of the suction pipe 10 when the compressor 1 is started. Stir vigorously. During the vigorous stirring, an abnormal sound is generated from the accumulator 8, resulting in noise and impairing the merchantability.

An object of the present invention is to provide a refrigerating apparatus which solves the above-mentioned problem and reduces the generation of abnormal noise by reducing the vigorous stirring phenomenon of refrigerating machine oil in an accumulator when starting a compressor. Aim.

[0016]

In order to achieve this object, a refrigerating apparatus according to the present invention comprises a horizontal rotary compressor, a condenser, a decompressor, an evaporator, a return pipe, and an accumulator near the compressor. The accumulator outflow pipe connecting the suction pipe of the compressor and the upper part of the accumulator, the return pipe and the lower part of the accumulator are connected, and the tip is inserted to the upper part inside the accumulator. An accumulator inflow pipe is provided.

Further, a bypass pipe having an inner diameter smaller than the accumulator outflow pipe is provided between the accumulator and the suction pipe.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has the above-described configuration,
Since the accumulator outlet pipe is provided at the upper part of the accumulator, the accumulator outlet pipe does not simultaneously draw in the refrigerating machine oil and the vaporized gas refrigerant at the time of starting the compressor. Then, the refrigerating machine oil collected inside the accumulator is sucked.

Thus, the vigorous stirring of the refrigerating machine oil in the accumulator at the time of starting the compressor can be reduced.
That is, the generation of abnormal sound from the accumulator during the vigorous stirring can be mitigated, and the drawback of causing noise and deteriorating the merchantability can be prevented.

Further, by connecting the lower part of the accumulator and the outflow pipe and providing a bypass pipe having an inner diameter smaller than the outflow pipe, the bypass pipe directly sucks only the refrigerating machine oil accumulated in the accumulator when the compressor is started. Therefore, the time during which the refrigerating machine oil is stored in the accumulator is shortened.

Thus, even if the refrigerating machine oil is vigorously stirred in the accumulator, the time can be shortened. That is, it is possible to shorten the time during which abnormal sound is generated from the accumulator during the vigorous stirring, and to prevent the disadvantage that the product is lost as noise.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a refrigeration apparatus according to the present invention will be described below with reference to the drawings. The components having the same configuration as the conventional example are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a sectional view showing the vicinity of an accumulator according to a first embodiment of the present invention.

In FIG. 1, an outflow pipe 9 is connected to the upper part of the accumulator 8, and an inflow pipe 7 is inserted from the lower part so that the tip is located in the upper part inside the accumulator 8. The outflow pipe 9 is connected to the suction pipe 10 of the compressor 1, and the inflow pipe 7 is connected to the return pipe 6.

The operation of the refrigeration system configured as described above will be described below. The gas refrigerant discharged from the compressor 1 passes through a discharge pipe 2, is liquefied in a condenser 3, is decompressed while passing through a decompressor 4 formed of a capillary tube or the like, and is evaporated at a predetermined temperature in an evaporator 5. And again the suction pipe 10
The cooling operation is continued by repeating the cycle of returning to the above.

When the operation of the compressor 1 is stopped in the normal ON-OFF operation, or when the operation of the compressor 1 is stopped during the defrosting to defrost the frost adhered to the evaporator 5 during the operation, the suction pipe 10 is Since the main side housing 19 and the sub side housing 20 are press-fitted into the through holes 30 communicating with the compression chambers 22 formed in close contact with both sides of the cylinder 18, the rollers 2
3 and the sliding parts of the vane 24 and the main side housing 1
The passage between the assembly 9 and the compression chamber 22 formed in close contact with both sides of the cylinder 18 by the auxiliary side housing 20 serves as a passage, and due to the high / low pressure difference when the compressor 1 is stopped, the refrigerating machine oil 11 is supplied to the suction pipe. 10 flows backward and accumulates in the accumulator 8.

For this reason, in the accumulator 8, the refrigerating machine oil 11 accumulates in the lower part and the vaporized gas refrigerant accumulates in the upper part.

Next, when starting the compressor 1, the suction pipe 10
And an outlet pipe 9 connected to an accumulator 8,
First, the vaporized gas refrigerant in the upper part of the accumulator 8 is sucked into the compressor 1, and then the refrigerating machine oil 11 in the lower part.

As a result, the refrigerating machine oil 11 accumulated in the accumulator 8 when the compressor 1 is started is returned to the compressor 1 smoothly, so that the refrigerating machine oil 11 is vigorously agitated in the accumulator 8 and abnormally. It is possible to alleviate the generation of noise and prevent a disadvantage that noise is generated and the merchantability is impaired.

As described above, the refrigerating apparatus of the present embodiment comprises a horizontal rotary compressor 1, a condenser 3, a decompressor 4, and an evaporator 5.
A return pipe 6 and an accumulator 8 in the vicinity of the compressor, which are sequentially connected in a ring shape, and an outlet pipe 9 of the accumulator 8 connecting between a suction pipe 10 of the compressor 1 and an upper part of the accumulator 8; Since the return pipe 6 and the lower part of the accumulator 8 are connected and the leading end thereof is provided with the inflow pipe 7 of the accumulator 8 inserted to the upper part inside the accumulator 8, the accumulator 8 is started when the compressor 1 is started. Does not simultaneously draw in the refrigerating machine oil 11 and the vaporized gas refrigerant.

First, the refrigerant gas is sucked from the vaporized gas refrigerant accumulated in the upper part of the accumulator 8, and then the refrigerating machine oil 11 accumulated in the lower part of the accumulator 8 is sucked. Thereby, vigorous stirring of the refrigerating machine oil 11 inside the accumulator 8 at the time of starting the compressor 1 can be alleviated.

That is, the generation of abnormal sound from the accumulator 8 during vigorous stirring can be mitigated, and the disadvantage that the product becomes a noise and impairs the merchantability can be prevented.

(Embodiment 2) Next, a second embodiment of the refrigerator according to the present invention will be described with reference to the drawings. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 2 is a sectional view showing the vicinity of an accumulator according to a second embodiment of the present invention. The bypass pipe 1 connecting the outflow pipe 9 of the accumulator 8, the lower part of the accumulator 8, and the outflow pipe 9 and having an inner diameter smaller than the outflow pipe 9
2 is provided.

With this configuration, when the compressor 1 is started, the bypass pipe 12 directly sucks only the refrigerating machine oil 11 accumulated in the accumulator 8, so that the time during which the refrigerating machine oil 11 accumulates in the accumulator 8 is shortened. If the refrigerating machine oil 11 is vigorously stirred in the accumulator 8, the time can be shortened.

That is, it is possible to shorten the time during which abnormal sound is generated from the accumulator 8 while the refrigerating machine oil 11 is being vigorously stirred, and to prevent the disadvantage that the product is lost due to noise.

During normal operation, since the inner diameter of the bypass pipe 12 is smaller than the inner diameter of the outflow pipe 9, most of the gas refrigerant vaporized due to the resistance difference of the pipe passes through the outflow pipe 9 and is partially contained in the refrigerant. Refrigeration oil 1 separated in accumulator 8
1 returns to the compressor 1 through the bypass pipe 12, so that the presence of the bypass pipe 12 does not hinder the normal operation.

As described above, the refrigerating apparatus of the present embodiment comprises the horizontal rotary compressor 1, the accumulator 8, the suction pipe 9 of the compressor 1, the outlet pipe 9 of the accumulator 8 connecting the upper part of the accumulator 8, and the accumulator 8. 8 is connected to the outflow pipe 9 and a bypass pipe 12 having an inner diameter smaller than that of the outflow pipe 9 is provided, so that when the compressor 1 is started, the bypass pipe 12 is located inside the accumulator 8. Since only the accumulated refrigerating machine oil 11 is directly sucked in, the time during which the refrigerating machine oil 11 is accumulated in the accumulator 8 is shortened. Even if the refrigerating machine oil 11 is vigorously stirred in the accumulator 8, the time can be shortened. .

That is, it is possible to shorten the time during which abnormal sound is generated from the accumulator 8 during the vigorous stirring, and to prevent the disadvantage that the product is lost due to noise.

[0040]

As described above, the present invention provides a horizontal rotary compressor, a condenser, a decompressor, an evaporator, a return pipe, and an accumulator in the vicinity of the compressor in the form of a circular connection. A refrigerating machine provided with an accumulator outlet pipe connecting the suction pipe of the compressor and the upper part of the accumulator, and an accumulator inlet pipe connected between the return pipe and the lower part of the accumulator and having a tip inserted to the upper part inside the accumulator. Since the apparatus is configured, intense agitation of refrigerating machine oil in the accumulator at the time of starting the compressor can be reduced. That is, it is possible to alleviate the generation of abnormal sound from the accumulator while being vigorously stirred, and to prevent a drawback that noise is generated and product quality is impaired.

Also, since the refrigerating apparatus is provided with a bypass pipe having an inner passage smaller than the accumulator outflow pipe, even if vigorous stirring of the refrigerating machine oil occurs in the accumulator, the time can be shortened. In other words, it is possible to shorten the time during which abnormal sound is generated from the accumulator during the vigorous stirring, and to prevent the drawback that noise is generated and the merchantability is impaired.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the vicinity of an accumulator of a refrigeration apparatus according to the present invention.

FIG. 2 is a sectional view showing the vicinity of an accumulator in a refrigeration apparatus according to a second embodiment of the present invention.

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

FIG. 4 is a sectional view of a conventional rotary compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 3 Condenser 4 Pressure reducer 5 Evaporator 6 Return pipe 7 Inflow pipe 8 Accumulator 9 Outflow pipe 10 Suction pipe 11 Refrigerator oil 12 Bypass pipe

Claims (2)

[Claims] 1. A horizontal rotary compressor, a condenser, a decompressor, an evaporator, a return pipe and an accumulator in the vicinity of the compressor are sequentially connected in a ring shape, and a suction pipe of the compressor and an upper part of the accumulator are connected. A refrigerating apparatus comprising: an accumulator outflow pipe for connecting the accumulator; and an accumulator inflow pipe connected between the return pipe and the lower part of the accumulator and having a tip inserted to an upper part inside the accumulator. 2. The refrigerating apparatus according to claim 1, wherein a bypass pipe having an inner diameter smaller than the outlet pipe of the accumulator is provided between the accumulator and the suction pipe.