JP2002267324A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which noise incident to refrigerant flow of an accumulator is eliminated after stopping a compressor. SOLUTION: The accumulator 11 comprises a hollow container 11a, an inlet tube 10 having one end connected to the cooler side and the other end fitted in the hollow container 11a, and an outlet tube 12 having one end fitted in the hollow container 11a and the other end connected with a suction pipe. A groove 10c having U-shaped or V-shaped cross-section is made in the outer circumference at the upper end part 10b of the inlet tube 10 and a pipe 14 having one end being fitted in the inlet tube 10 by providing an inlet part except a part of the groove 10c and the other end extending toward the upper end of the hollow container 11a of the accumulator 11 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, to a structure for preventing generation of sound in an accumulator constituting a refrigeration cycle of the refrigerator.

[0002]

2. Description of the Related Art A conventional refrigerator will be described with reference to FIGS. 1, 2 and 4. FIG. FIG. 1 shows the main body of the refrigerator,
This shows an example of the arrangement of the components of the refrigeration cycle. The main body 1 is composed of an outer box 2, an inner box 3, and a foam insulating material 4 filled between them. A compressor 5 is arranged, and a cooler 9 is arranged at an upper part in the inner box 3. A high-pressure side pipe constituted by connecting a heat-radiating pipe 6, a dryer 7, and a capillary tube 8 which are also a condenser in series between a discharge side of the compressor 5 and an inlet of the cooler 9 is connected in series, and the cooling is performed. An accumulator 11 having an inlet pipe 10 having an oil return hole 10a formed in the lower end thereof, and an outlet pipe 12 being fitted in the upper end thereof, between the outlet of the compressor 9 and the suction side of the compressor 5; 13 are connected in series to form a refrigeration cycle by connecting low-pressure-side pipes. The capillary tube 8 is attached to the suction pipe 13 and is buried in the foam insulation 4.

The accumulator 11 has a hollow container 11a as shown in FIG. 4 and one end connected to the cooler 9 side.
The inlet pipe (inner pipe) 10 having the other end inserted into the hollow container 11a, and the outlet pipe 12 having one end fitted into the hollow container 11a and the other end connected to the suction pipe 13. Thus, the gas-liquid mixed refrigerant flowing out of the cooler 9 into the accumulator 11 is separated into a gas phase (gas refrigerant) and a liquid phase (liquid refrigerant), and the liquid refrigerant 15 is retained in the accumulator 11. This prevents the occurrence of abnormal noise and the like due to the liquid compression of the compressor 5. An oil return hole 10a is provided at a lower portion of the inlet pipe 10 to prevent oil (lubricating oil of the compressor 5) mixed in the refrigerant from accumulating in the accumulator 11, and when the compressor 5 starts up. , To the compressor 5 side (return pipe).

However, when the inside of the refrigerator reaches a predetermined cooling temperature and the compressor 5 stops, the accumulator 1
The gas-liquid mixed refrigerant remains in 1, and the gas refrigerant and the liquid refrigerant 15 flow into the cooler 9 due to the pressure balance of the refrigeration cycle. The accumulator 11
In the upper part, the internal pressure rises and the oil comes out from the oil return hole 10a to the uppermost part of the cooler 9. Then, the volume of the gas refrigerant that has flowed in increases, the pressure increases, and the liquid refrigerant 15 on the outlet side of the cooler 9 tries to be pushed up to the tip end opening of the inlet pipe.

When the gas phase and the liquid phase are separated from each other, the difference between the pressure at the tip opening of the inlet pipe 10 and the pressure from the outlet pipe 12 is large. When the difference between the pressure at the tip opening of the inlet pipe 10 and the pressure from the outlet pipe 12 is small, the pressure at which the liquid refrigerant 15 is pushed out from the tip opening of the inlet pipe 10 is reduced. Instead, the liquid is dripped into the accumulator 11 from the distal end opening of the inlet pipe 10 and comes out of the oil return hole 10a. The air bubbles generated at that time cause an unusual noise to be transmitted to the outside, causing a problem that the noise may be generated.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a refrigerator which eliminates noise caused by the flow of the refrigerant in the accumulator after the compressor is stopped. And

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a main body formed by filling a foamed heat insulating material between an outer case and an inner case. Is arranged,
In the upper part of the inner box, a cooler provided with an inlet and an outlet for the refrigerant on one upper side is provided, and a radiating pipe also serving as a condenser between the discharge side of the compressor and the inlet of the cooler, A high pressure side pipe configured by sequentially connecting a dryer and a capillary tube in series is connected, and between an outlet of the cooler and a suction side of the compressor,
An inlet pipe having an oil return hole formed therein is inserted thereinto, an accumulator having an outlet pipe fitted thereinto is connected to a low-pressure side pipe formed by connecting a suction pipe in series, and the capillary pipe is connected to the suction pipe. And a groove formed in the outer periphery of the upper end of the inlet pipe, and an inlet is provided with one end leaving a part of the groove. A pipe is fitted to the pipe and the other end is extended toward the upper end of the accumulator.

The sectional shape of the groove is U-shaped or V-shaped.

[0008] An inclined surface is formed on the rear surface of the entrance.

A notch centered on the groove is formed at an outlet provided at the tip of the inlet pipe.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. The same reference numerals are used for the same parts as in the conventional example. FIG. 1 is a front view (A) of a refrigerator according to the present invention and a sectional side view (B) of a main part, and FIG. 2 is a perspective view (A) showing a relationship between a cooler and an accumulator according to the present invention, and a front view ( B), and FIG. 3 is a longitudinal sectional view (A) of an accumulator showing an embodiment of the present invention, and an enlarged sectional view of a main part (B), in which the shape of the groove in the embodiment of the present invention is shown in (B). (C) and (D) as viewed from the direction of arrow a, and an enlarged cross-sectional view (E) of an essential part showing an embodiment of the groove portion of the present invention.

FIG. 1 shows a schematic configuration of a refrigerator, in which 1 is a refrigerator main body (insulated) made of an outer box 2 made of a steel plate, an inner box 3 made of a synthetic resin, a foamed heat insulating material 4 and the like. A compressor 5 is disposed at a lower rear portion of the main body 1, and a cooler 9 is disposed at an upper portion in the inner box 3.
A high-pressure side pipe formed by connecting a heat-radiating pipe 6 also serving as a condenser, a dryer 7 and a capillary tube 8 in series in order between the compressor 5 and the cooler 9, and an outlet of the cooler 9. An inlet pipe 10 having an oil return hole 10a formed in the lower end thereof is inserted between the suction pipe and the suction side of the compressor 5, and an accumulator 11 having an outlet pipe 12 fitted in the upper end thereof, and a suction pipe 13 are sequentially connected in series. Is connected to a low-pressure side pipe configured to form a refrigeration cycle. The suction pipe 13 and the capillary tube 8 are attached to each other, and are buried in the foam insulation 4.

The relationship between the cooler 9 and the accumulator 11 according to the present invention will be described with reference to FIGS. As described in FIG. 4 of the related art, the accumulator 11 includes a hollow container 11a, the inlet pipe 10 having one end connected to the cooler 9 side, and the other end inserted into the hollow container 11a. The outlet pipe 12 has one end fitted into the hollow container 11 a and the other end connected to the suction pipe 13.

As shown in FIGS. 3 (B), 3 (C) and 3 (D) of this embodiment, the outer periphery of the upper end 10b of the inlet pipe 10 has a U-shaped or V-shaped cross section. A groove 10c is formed, one end of which is provided with an inlet 10e while leaving a part of the groove 10c, fitted into the inlet pipe 10, and the other end of the hollow container 11 of the accumulator 11 is provided.
a The pipe 14 extends toward the upper end. In addition, the length of the inlet pipe 10 is a length that can form the groove 10c, and the length of the pipe 14 is a length that always projects from the surface of the liquid refrigerant 15.

As shown in an enlarged sectional view of a main part of the groove in FIG. 3E, the inlet 10e provided with a part of the groove 10c is used as the oil return hole 10a, and the inlet 1a is formed.
The groove 10c is formed from 0e toward the tip 10d of the inlet pipe 10, and the groove 10c on the tip 10d side of the inlet pipe 10 is an outlet 10f of the oil return hole 10a.

Further, the entrance 10e of the groove 10c is formed.
By forming an inclined surface on the rear surface and forming a notch at the outlet 10f of the groove 10c, the oil (lubricating oil of the compressor 5) mixed in the refrigerant can be removed when the compressor 5 is started. It is smoothly returned to the compressor 5 side (return pipe).

In the above configuration, the relationship between the cooler 9 and the accumulator 11 and the embodiment of the present invention have been described.
If f is formed upward, after the inside of the refrigerator reaches a predetermined cooling temperature and the compressor 5 is stopped, the gas refrigerant that increases in the cooler 9 due to the pressure balance is discharged from the oil return hole 10a. Since it is possible to prevent the refrigerator from coming off, it is possible to eliminate the generation of a rattling sound in the accumulator 11, which is a problem in the conventional refrigerator.

[0017]

As described above, according to the present invention,
After the compressor is stopped, the refrigerator is configured to eliminate noise generated due to the flow of the refrigerant in the accumulator.

[Brief description of the drawings]

FIG. 1 is a front view of a refrigerator according to the present invention and a conventional example (A).
FIG.

FIG. 2 is a perspective view (A) and a front view (B) showing a relationship between a cooler and an accumulator according to the present invention and a conventional example.

FIG. 3 is a longitudinal sectional view (A) of an accumulator showing one embodiment of the present invention, and an enlarged sectional view of a main part (B), and FIG. It is an arrow view (C) and (D), and the principal part expanded sectional view (E) which shows the Example of the groove part of this invention.

FIG. 4 is a longitudinal sectional view (A) showing an example of a conventional accumulator and an enlarged sectional view (B) of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body (insulated box) 2 Outer box 3 Inner box 4 Foam insulation material 5 Compressor 6 Radiation pipe 7 Dryer 8 Capillary tube 9 Cooler 10 Inlet pipe 10a Oil return hole 10b Upper end part 10c Groove part 10d Tip part 10e Inlet part 10f Exit Part 11 Accumulator 11a Hollow container 12 Outlet pipe 13 Suction pipe 14 Pipe 15 Liquid refrigerant

Claims (4)

[Claims] 1. A main body is formed by filling a foamed heat insulating material between an outer box and an inner box, and a compressor is disposed at a lower rear portion of the main body.
In the upper part of the inner box, a cooler provided with a refrigerant inlet and outlet on one upper side is disposed, and a radiating pipe also serving as a condenser between the discharge side of the compressor and the inlet of the cooler, A high pressure side pipe configured by sequentially connecting a dryer and a capillary tube in series is connected, and between an outlet of the cooler and a suction side of the compressor,
An inlet pipe having an oil return hole formed therein is inserted thereinto, an accumulator having an outlet pipe fitted thereinto is connected to a low-pressure side pipe formed by connecting a suction pipe in series, and the capillary pipe is connected to the suction pipe. And a refrigerator embedded in the foam insulation, wherein a groove is formed on the outer periphery of the upper end of the inlet pipe,
A refrigerator characterized in that one end is provided with an inlet portion leaving a part of the groove portion and fitted into the inlet pipe, and the other end is provided with a pipe extending toward an upper end of the accumulator. 2. The refrigerator according to claim 1, wherein the groove has a U-shaped or V-shaped cross section. 3. The refrigerator according to claim 1, wherein an inclined surface is formed on a rear surface of the inlet portion. 4. An outlet provided at a tip of the inlet pipe,
4. The refrigerator according to claim 1, wherein a notch is formed around the groove.