JPH09257322A - Freezer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abnormal sound from being produced at an accumulator due to oil of a freezer flowed back from a compressor into the accumulator under a stopped state of the compressor when the compressor starts its operation again in a freezer device provided with the accumulator arranged near the compressor of a refrigerator. SOLUTION: This freezer device is constructed such that a compressor 1, a condensor 23, a pressure reducer 24, an evaporator 25 and an accumulator 28 arranged near the comressor 1 are connected in series in an annular form. In a container of the accumulator 28 is arranged a partition plate 29 floating in oil 6 of the freezer for use in separating the oil 6 of the freezer accumulated by reverse flow generated when the compressor stops from refrigerator flowed in when the compressor stops its operation. Then, both oil 6 of the freezer and refrigerant are completely separated within the accumulator 28 to attempt an effect capable of preventing an abnormal sound from being produced when the compressor is started to operate.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a refrigeration system.

[0002]

2. Description of the Related Art A conventional refrigeration system is disclosed in Japanese Patent Laid-Open No. 62-1309.
No. 5 is known.

FIG. 4 is a sectional view of a horizontal rotary compressor, and FIG.
[Fig. 4] is a piping diagram of a refrigeration system to which a 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. 6
Is the refrigerating machine oil and is accumulated below the compressor 1.

The compression element 5 includes a cylinder 7, a main side housing 8 and a sub side housing 9, which are closely attached to both sides of the cylinder 7 to form a compression chamber 10. Reference numeral 11 is a crankshaft connected to the rotor 3 and has an eccentric portion 12.
A roller 13 is fitted in the eccentric portion 12 and is inscribed in the compression chamber 10. 14 is a vane, and a spring 13 is a roller 13
The pressure of the compression chamber 10 is made high and low by being pressed against. Reference numeral 16 denotes an oil supply pipe, one end of which enters the refrigerating machine oil 6 and a coil spring 17 fixed to the crankshaft 11 is arranged inside. Reference numeral 18 is a discharge valve provided in the sub side housing 9. Reference numeral 19 denotes a discharge cover, and the cup-shaped portion of the discharge cover 19 is formed as a discharge chamber 20.

The oil supply pipe 16 is integrated with the discharge cover 19 and is 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 refrigerating machine oil 6, and is press-fitted into a through hole 19a 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 a decompressor 24 composed of a capillary tube or the like, an evaporator 25,
And an evaporator 25 and a connecting pipe 26 connecting the suction pipe 21 are sequentially connected in an annular shape, and an accumulator 27 for relaxing liquid return is provided on the compressor side of the connecting pipe 26, and an inflow pipe 27a and an outflow pipe are provided. 27b, an oil return opening 27c provided at the base of the outflow pipe 27b, and a liquid reservoir 27d constitute a refrigeration system.

The operation of the refrigerating apparatus constructed as above will be described below. The rotation of the rotor 3 forming the electric element 4 is transmitted to the crankshaft 11 and its eccentric portion 1
The roller fitted in 2 is given a rotational motion to compress the refrigerant sucked through the suction pipe 21 in the compression chamber 10.

The rotor 3 is rotated by the crankshaft 11
A rotary movement is also given to the coil spring 17 fixed to one end of the compressor 1, and the refrigerating machine oil 6 accumulated below the compressor 1 by the rotational centrifugal force is transferred to the crankshaft 11 side to supply 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 20 from the discharge valve 18 provided in the sub-side housing 9, and is discharged from the discharge cover 19 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.

[0010]

In the domestic refrigerator / freezer in which this refrigerating apparatus is mounted, quietness is required.

However, in the above-mentioned conventional structure, the suction pipe 21 is press-fitted into the through hole 19a communicating with the compression chamber 10 formed on the both sides of the cylinder 7 in the main side housing 8 and the sub side housing 9 in close contact with each other. A clearance is provided between the sliding parts of the rollers 13 and the vanes 14 and the compression chamber 10 formed by the main side housing 8 and the sub side housing 9 in close contact with each other on both sides of the cylinder 7, and serves as a passage to stop the compressor. Due to the high and low pressure difference, the refrigerator oil 6 flows backward through the suction pipe 21 and accumulates in the accumulator 27. This phenomenon is more likely to occur as the clearance in assembly increases and the pressure of the applied refrigerant increases.
The refrigerating machine oil 6 accumulated in the accumulator 27 is vigorously agitated due to the pressure change at the time of starting the compressor, and while vigorous agitation, an abnormal sound is generated from the accumulator 27, which causes noise and impairs the commercial property. It was

The present invention solves the above-mentioned problems. Even when the refrigerating machine oil flows back into the accumulator when the compressor is stopped, the accumulator is prevented from stirring with the refrigerant flowing in when the compressor is restarted. The purpose is to prevent abnormal noise from being generated.

[0013]

In order to solve this problem, the present invention provides a container, an inflow pipe connected to the upper part of the container, an outflow pipe inserted from the lower part of the container, and the above-mentioned outflow pipe. An opening hole for oil return provided at the base of the container,
When a partition plate that floats on the refrigerating machine oil accumulated in the accumulator container is provided, the refrigerating machine oil accumulated in the accumulator container is completely separated from the refrigerant.

Thus, it is possible to prevent the refrigerating machine oil from being vigorously stirred by the refrigerant flowing into the accumulator due to the difference in pressure level when the compressor is restarted. That is, it is possible to alleviate the generation of an abnormal sound from the accumulator while being vigorously stirred, and to prevent the drawback of becoming a noise and impairing the marketability.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a horizontal rotary compressor,
A condenser, a pressure reducer, an evaporator, and an accumulator provided in the vicinity of the compressor are sequentially connected in an annular shape, and the accumulator is a container, an inflow pipe connected to an upper part of the container, and a lower part of the container. Outlet pipe inserted more, the opening hole for oil return provided at the root in the container of the outflow pipe, a partition plate floating in the refrigerating machine oil for separating the refrigerating machine oil and the refrigerant accumulated in the accumulator container It is a refrigerating device having the configuration that even if the refrigerating machine oil flows back into the accumulator when the compressor is stopped, the partition plate floating on the refrigerating machine oil accumulated in the accumulator causes the refrigerant to flow into the accumulator when the compressor is restarted. And are completely separated.
As a result, it is possible to prevent the refrigerating machine oil from being vigorously stirred by the refrigerant flowing into the accumulator due to the pressure difference when the compressor is restarted. That is, it is possible to alleviate the generation of an abnormal sound from the accumulator while being vigorously stirred, and to prevent the drawback of becoming a noise and impairing the commercial property.

[0016]

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

FIG. 1 shows a refrigeration cycle piping diagram according to an embodiment of the present invention. In FIG. 1, a horizontal rotary compressor 1 is shown.
The condenser 23, the decompressor 24, the evaporator 25, and the accumulator 28 provided in the vicinity of the compressor 1 are sequentially connected in an annular shape. FIG. 2 shows a cross-sectional view of the refrigeration cycle part, and the accumulator 28 has a container 28 that can store a liquid to mitigate liquid return when the compressor is started.
a, the inflow pipe 28b is provided on the upper part of the container 28a, and the container 2
Outflow pipe 28c is inserted in the lower part of 8a, and outflow pipe 2
Reference numeral 8c denotes an oil return opening hole 28d provided at a root portion of the container 28a and a refrigerating machine oil 6 for separating refrigerating machine oil and refrigerant from the accumulator 28 inside the container 28a.
A partition plate 29 that floats at the bottom is provided. FIG.
Shows a cutaway view of the accumulator 28. The partition plate 29 has an outer periphery in contact with the inner wall of the container 28a and an inner periphery of the outflow pipe 28.
It is configured in a donut shape so as to contact the outer wall of c.

The operation of the refrigerating apparatus constructed as above will be described below. The gas refrigerant discharged from the compressor 1 is liquefied in the condenser 23 through the discharge pipe 22,
The cooling action is continued by repeating a cycle in which the pressure is reduced while passing through the pressure reducer 24 formed of a capillary tube or the like, the vaporizer 25 evaporates at a predetermined temperature and returns to the suction pipe 21 again.

When the compressor 1 is stopped during normal on-off operation, or when the compressor 1 is stopped during defrosting to defrost the evaporator 25 during operation, the suction pipe 21 is stopped. Is press-fitted into the through hole 19a communicating with the compression chamber 10 formed on both sides of the cylinder 7 by the main side housing 8 and the sub side housing 9, so that the sliding parts of the roller 13 and the vane 14 and the main side housing are 8 and the auxiliary side housing 9 and the compression chamber 10 formed on both sides of the cylinder 7 in close contact with each other serve as a passage, and due to the pressure difference when the compressor 1 is stopped,
Refrigerating machine oil 6 flows backward through the suction pipe 21. At this time, the partition plate 29 inside the container 28a of the accumulator 28 floats on the oil surface of the refrigerating machine oil 6 that flows back from the compressor 1 and is accumulated inside the container 28a of the accumulator 28, and changes due to the change in the oil surface height. The container 28a of the accumulator 28 can be moved up and down without resistance. Further, the amount of the refrigerating machine oil 6 which flows back from the compressor 1 is 1 / the amount enclosed in the compressor 1 by an experiment.
It is known that the number is 3 or less, and when the compressor 1 is restarted, the counter-refrigerating machine oil 6 is stored in the accumulator 28.
Refrigerator oil that flows back from the compressor 1 again by returning to the compressor 1 through the oil return opening 28d in the base portion of the outflow pipe 28c in the container 28a, and then stopping again It has been found that the quantity of 6 is always within a certain quantity. Therefore, the container 28a of the accumulator 28
Since the amount of the refrigerating machine oil 6 accumulated inside the container due to the reverse flow when the compressor is stopped is always within a fixed amount, the insertion length of the accumulator 28 into the container 28a of the inflow pipe 28c is accumulated in the container 28a. The refrigerating machine oil 6 has a length equal to or greater than the height of the refrigerating machine oil 6 and accumulates inside the container 28a.
The partition plate 29 that floats on the inside does not come off from the outflow pipe 28c inserted inside the container 28a. Further, since there is no gap between the inner wall of the container 28a of the accumulator 28 and the partition plate 29, and the outer wall of the inflow pipe 28b inside the accumulator 28 and the partition plate 29, the gas flows into the container 28a of the accumulator 28 when the compressor is restarted. The refrigerant 30 and the container 28 of the accumulator 28 due to the reverse flow when the compressor is stopped
Refrigerating machine oil 6 accumulated in a does not mix.

According to the present invention, the refrigerating machine oil 6 that flows backward from the compressor 1 into the accumulator 28 and the refrigerant 30 that flows into the accumulator 28 when the compressor is restarted are completely separated from each other, so that they are not vigorously stirred. As a result, it is possible to mitigate the generation of abnormal sound from the accumulator 28 when the compressor 1 is started up, and to prevent the disadvantage that it becomes noise and impairs the commercial characteristics.

As described above, the refrigerating apparatus of this embodiment includes the compressor 1, the condenser 23, the decompressor 24, the evaporator 25, and
An accumulator 28 provided in the vicinity of the compressor 1 is sequentially connected in an annular shape, and the accumulator 28 is connected to the container 2
8a and an inflow pipe 28b connected to the upper part of the container 28a
And an outflow pipe 28c inserted from the lower part of the container 28a,
An opening hole 28d for returning oil provided at the base of the container 28a of the outflow pipe 28c, and a partition plate 29 floating on the refrigerating machine oil 6 for separating the refrigerating machine oil 6 and the refrigerant 30 accumulated in the container 28a of the accumulator 28 from each other. Therefore, the reverse flow of the refrigerating machine oil 6 into the accumulator 28 when the compressor 1 is stopped can be mitigated, and abnormal noise can be reduced.

[0022]

As described above, according to the present invention, the compressor, the condenser, the decompressor, the evaporator, and the accumulator provided near the compressor are sequentially connected in an annular shape, and the accumulator is provided. Is a container, an inflow pipe connected to the upper part of the container, an outflow pipe inserted from the lower part of the container, an opening hole for oil return provided at the root of the outflow pipe in the container, and the accumulator Since it has a partition plate that floats on the refrigerating machine oil that separates the refrigerating machine oil and the refrigerant that accumulate in the container, even if the refrigerating machine oil flows back to the accumulator when the compressor is stopped, stirring with the refrigerant that flows in when the compressor restarts It is possible to obtain the advantageous effect that the noise can be alleviated and the generation of abnormal sound can be reduced.

[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 partial sectional view of a schematic refrigerating cycle of a refrigerating apparatus according to an embodiment of the present invention.

FIG. 3 is a cutaway view of the accumulator.

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

FIG. 5 is a schematic refrigeration cycle diagram of a conventional refrigeration system.

[Explanation of symbols]

 1 Compressor 6 Refrigerator oil 23 Condenser 24 Decompressor 25 Evaporator 28 Accumulator 28a Container 28b Inflow pipe 28c Outflow pipe 28d Oil return opening hole 29 Partition plate 30 Refrigerant

Claims (1)

[Claims] 1. A compressor, a condenser, a decompressor, an evaporator, and an accumulator provided near the compressor are sequentially connected in an annular shape, and the accumulator is connected to a container and an upper part of the container. An inflow pipe, an outflow pipe inserted from the lower portion of the container, an oil return opening hole provided at the root of the outflow pipe in the container, and a refrigerating machine oil and a refrigerant that accumulate in the accumulator container. A refrigeration system equipped with a partition plate that floats on the refrigerating machine oil to be separated.