JP3214221B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator for reducing the flow of refrigerant in a cooling pipe of a refrigeration cycle.

[0002]

2. Description of the Related Art In a conventional refrigerator, when a compressor is stopped during a cooling operation of a refrigeration cycle, a refrigerant flow noise (sloppy noise) is generated in a refrigerant flow path of an accumulator.

[0003] Referring to FIGS. 4 and 5, a description will be given of a mechanism for generating a refrigerant flow sound of a conventional refrigerator.

The refrigerant in the evaporator 7 tube during the cooling operation forms a gas-liquid two-phase flow of the gas refrigerant 16 generated by evaporation and the unevaporated liquid refrigerant 17.

The liquid refrigerant 17 that has not evaporated in the evaporator 7 is retained in the accumulator 9 so that the liquid refrigerant 17 is
To prevent it from being sucked into the compressor.

An inner pipe 15 connected to the outlet pipe 8 of the evaporator 7 is arranged in the accumulator 9, and the evaporator outlet pipe 8 has a curved portion 12 near the inlet of the accumulator 9.
And the inner pipe 15
Is linked to

The inner pipe 15 discharges the discharged gas-liquid two-phase refrigerant to the inner wall of the accumulator 9 to separate the refrigerant into gas and liquid.

The inner pipe 1 in the accumulator 9
An oil return hole 14 is provided at the lower portion of the accumulator 9 to prevent oil mixed in the refrigerant from accumulating in the accumulator 9.

When the refrigerator reaches a predetermined temperature and the compressor 1 stops, the gas refrigerant 16 is sealed in the evaporator 7.

The gas refrigerant 16 and the liquid refrigerant 17 sealed in the evaporator 7 evaporate a part of the liquid refrigerant as the temperature in the refrigerator increases, and the gas refrigerant 16 further increases in volume and pressure. While pushing the liquid refrigerant 17 at the outlet of the evaporator 7, the gas lump 1
Although flowing as 6a, a part of the gas refrigerant 16 was discharged into the accumulator 9 from the oil return hole 14 at the lower part of the inner pipe 15, and at that time, a refrigerant flowing sound (sloppy sound) was generated.

[0011] This type of refrigerator related to the reduction of refrigerant flow noise is disclosed in, for example, Japanese Utility Model Laid-Open No. 1-971.
No. 66 is cited.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide a refrigerator in which the flow noise of refrigerant generated when the compressor of a refrigeration cycle is stopped is reduced.

[0013]

To achieve the above object, the present invention provides a compressor, a condenser, an evaporator, and an accumulator.
And a refrigerator that circulates refrigerant through these
Having an opening inside the accumulator
The placed inner pipe and under this inner pipe
It is provided with a plurality of holes provided on one side .

[0014]

The refrigerant in the accumulator during and after the cooling operation of the refrigeration cycle forms a two-phase liquid of a gas refrigerant in the upper part and a liquid refrigerant in the lower part.

When the operation is stopped and the temperature in the refrigerator rises, a part of the liquid refrigerant in the evaporator evaporates and increases in volume to form a gas mass while pushing the liquid refrigerant to flow toward the accumulator. By providing a plurality of holes on the lower side of the inner pipe , the mass of gas discharged from the holes is reduced, and the sound of refrigerant flow can be reduced.

Also, by increasing the number of holes ,
The liquid refrigerant accumulated in the accumulator easily returns to the evaporator,
The liquid level also dropped, and the distance between the hole and the liquid level became smaller,
As possible out is possible to reduce the more refrigerant flow sound.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an enlarged view of a main part of the accumulator and the evaporator of the present embodiment.

FIG. 5 is a diagram showing a refrigeration cycle of the present invention.
It is composed of a compressor 1, a condenser 3, a dryer 5, a capillary tube 6, an evaporator 7, an accumulator 9, and pipes 2, 4, 8, 10 and the like connecting these. The accumulator 9 connected to the outlet pipe 8 of the evaporator 7 has an inner pipe 15 as shown in FIG. 1 and four φ1.5 oil return holes 14 at the bottom of the inner pipe 15 as shown in FIG. The refrigerant to be discharged flows out to the inner wall of the accumulator 9 and is separated into gas and liquid.

In the refrigerator having the above-mentioned structure, as shown in FIG.
Is confined in the evaporator 7, a part of the liquid refrigerant 17 evaporates as the temperature in the refrigerator rises, the volume of the gas refrigerant 16 increases, and flows as a gas mass 16 a to the accumulator 9 side, and the inner pipe 15 The gas mass 16 a is smaller than the four oil return holes 14 at the bottom and is discharged into the liquid refrigerant 17. At this time, the noise of the generated refrigerant can be reduced because the gas mass is small.

Further, since there are four oil return holes 14, the liquid refrigerant 17 collected in the accumulator 9 easily returns to the evaporator 7, the liquid level is lowered, the distance between the oil return hole 14 and the liquid level is small, and the refrigerant noise is reduced. Can be further reduced.

FIG. 2 shows a second embodiment, in which two φ2 oil return holes 14 are opened in the inner pipe 15.
There is almost the same effect as in FIG.

FIG. 3 shows a third embodiment, in which four φ1 oil return holes 14 are provided in the inner pipe 15 and two rows of
This has an effect similar to that shown in FIGS.

The same effect can be obtained by providing a plurality of oil return holes in this way.

[0024]

According to the present invention, the refrigerant flow noise generated when the compressor is stopped during the cooling operation of the refrigerator (sloppy noise).
And noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an accumulator and an evaporator showing one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of an accumulator according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part of an accumulator according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a conventional accumulator and evaporator.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Compressor, 3 ... Condenser, 5 ... Dryer, 6 ... Capillary tube, 7 ... Evaporator, 9 ... Accumulator, 11 ... Suction pipe, 12 ... Curved part, 13 ... Rise part, 14 ... Oil return hole, 15 ... Inner pipe, 16: gas refrigerant, 16a: lump of gas refrigerant, 17: liquid refrigerant

────────────────────────────────────────────────── ─── Continuation of the front page (72) Tadashi Tokita 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture Living Equipment Division, Hitachi, Ltd. (56) References JP-A-4-324080 (JP, A) Opened 63-183358 (JP, A) Opened open 61-93767 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 43/00

Claims (1)

(57) [Claims] 1. A compressor, a condenser and an evaporator and Akyumure <br/> motor is connected, a refrigerator der circulating a coolant thereto
Therefore, it is arranged with an opening inside the accumulator.
And the lower side of this inner pipe
Refrigerator with multiple holes provided in it.