JP2002174482A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which noise incident to the flow of refrigerant is eliminated at an accumulator section after stopping a compressor. SOLUTION: An accumulator 11 comprises a hollow container 11a, an inlet tube 10 having one end coupled to the cooler side and the other end inserted into the hollow container 11a, and an outlet tube 12 having one end fitted in the hollow container 11a and the other end being coupled with a suction pipe. A thick sleeve 14 is provided in the joint 16 of the upper end of the accumulator 11 and the outlet tube 12, difference between the inside diameter 14b of the sleeve 14 and the inside diameter 10b at the forward end opening of the inlet tube 10 in the accumulator 11 is increased, and the inside diameter 14b of the sleeve 14 is set thinner than the inside diameter 10b at the forward end opening of the inlet tube 10.

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 a refrigerant from flowing in an accumulator section 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 6. 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. Between the outlet of the compressor 9 and the suction side of the compressor 5, an inlet pipe 10 is inserted inside the lower end, one end of a sleeve 14 is inserted inside the upper end, and the other end of the sleeve 14 is connected to the outlet pipe 12. A refrigeration cycle is formed by connecting the fitted accumulator 11 and the suction pipe 13 in series to a low-pressure side pipe. 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. 6 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 in the lower part of the inlet pipe 10.
This prevents oil (lubricating oil of the compressor 5) mixed in the refrigerant from accumulating in the accumulator 11.

The sleeve 14 having a small thickness is provided in a joint portion 16 between the upper end of the accumulator 11 and the outlet pipe 12, and the inner diameter 14a of the sleeve 14 is thin. It has a size substantially equal to the inner diameter 10b of the opening at the distal end of the tube 10. The sleeve 14 is made of stainless steel, and when the butt portion between the upper end of the accumulator 11 made of aluminum and the outlet pipe 12 is joined by argon welding, the melted aluminum is filled inside the outlet pipe 12. It has a role to protect from entering.

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 cooler 9
Exit to the top of 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 is pushed up to the front end opening of the inlet, and is ejected into the accumulator 11 together with the liquid refrigerant 15. .

As a result, the amount of the liquid refrigerant 15 in the accumulator 11 increases, and the opening at the distal end of the inlet pipe 10 is hidden by the liquid refrigerant 15 and subsequently flows out from the opening at the distal end of the inlet pipe 10. The gas refrigerant that rises through the liquid refrigerant 15 stagnating in the accumulator 11 and rises at this time.
In No. 1, there was a problem that a clicking sound was generated and transmitted to the outside, which could cause noise.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a refrigerator which eliminates the noise generated by the flow of the refrigerant in the accumulator after the compressor is stopped. The purpose is.

[0007]

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, and a compressor provided at a lower rear portion of the main body. 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 is inserted into the lower end, one end of the sleeve is inserted into the upper end, and an accumulator in which the other end of the sleeve is inserted into the outlet pipe is connected to a low-pressure side pipe that is formed by connecting a suction pipe in series. In the refrigerator, wherein the capillary is attached to the suction pipe and buried in the foamed heat insulating material, the sleeve is made thick, and the inner diameter of the sleeve is set at the end opening of the inlet pipe inside the accumulator. It is formed to be thinner than the inside diameter.

The inner diameter of the sleeve is gradually reduced from the upper end of the accumulator toward the outlet pipe.

A main body is formed by filling a foamed heat insulating material between the outer case and the inner case. A compressor is disposed at a lower rear portion of the main body. A high-pressure system in which a cooler provided with an inlet and an outlet of the compressor is arranged, and a radiating pipe, a dryer, and a capillary tube also serving as a condenser are sequentially connected in series between the discharge side of the compressor and the inlet of the cooler. Connect the side piping,
Between the outlet of the cooler and the suction side of the compressor, an inlet pipe is fitted inside the lower end, and an accumulator fitted with an outlet pipe inside the upper end, and a low-pressure side configured by connecting a suction pipe in series. In a refrigerator in which a pipe is connected and the capillary tube is attached to the suction pipe and embedded in the foamed heat insulating material, the inside diameter of the fitting portion of the outlet pipe or the vicinity of the fitting portion is determined by the accumulator. It is formed thinner than the inner diameter of the opening at the end of the inlet pipe inside.

[0010] The inner diameter of the outlet pipe is formed smaller than the inner diameter of the opening at the end of the inlet pipe.

The inner diameter of the upper end of the accumulator is formed smaller than the inner diameter of the opening at the end of the inlet pipe.

[0012]

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 a first embodiment of the present invention.
And (B) and (C) are main part enlarged sectional views.

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 constituted by connecting a heat-radiating pipe 6 also serving as a condenser, a dryer 7 and a capillary tube 8 in series between the compressor 5 and the cooler 9 in order, and an inlet pipe 1 inside the lower end.
0, and one end of the sleeve 14 is fitted inside the upper end.
The accumulator 11 in which the other end of the sleeve 14 is fitted to the outlet pipe 12 is connected to a low-pressure side pipe constituted by connecting the suction pipes 13 in series 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. 6 of the related art, the accumulator 11 has a hollow container 11a, the inlet pipe 10 having one end connected to the cooler 9 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 FIG. 3B of this embodiment, a thick sleeve 14 is provided in a joint 16 between the upper end of the accumulator 11 and the outlet pipe 12.
And the inner diameter 14b of the sleeve 14 is changed to the inner diameter 10b of the distal end opening of the inlet pipe 10 inside the accumulator 11.
The inner diameter 14b of the sleeve 14 is formed to be smaller than the inner diameter 10b of the distal end opening of the inlet pipe 10.

In the embodiment shown in FIG. 3C, the inner diameter 14a of the sleeve 14 is
The inner diameter 14c is gradually reduced from the upper end toward the outlet pipe 12 side. The sleeve 14 is made of stainless steel, and when the butt portion between the upper end of the accumulator 11 made of aluminum and the outlet pipe 12 is joined by argon welding, the melted aluminum is filled inside the outlet pipe 12. It has a role to protect from entering.

Although the relationship between the cooler 9 and the accumulator 11 and the first embodiment of the present invention have been described above, in such a case, the inside of the refrigerator reaches a predetermined cooling temperature and the compressor After the operation of the refrigerator 5 is stopped, the increasing amount of the gas refrigerant in the cooler 9 due to the pressure balance after the refrigeration cycle can be confined. Can be eliminated.

FIG. 4 shows a longitudinal sectional view (A) of an accumulator showing a second embodiment of the present invention and an enlarged sectional view (B) of a main part. The difference from the previously described one is as follows. By removing the sleeve 14 and increasing the thickness of the outlet pipe 12, the inner diameter 12 b of the outlet pipe 12 is formed smaller than the inner diameter 10 b of the opening at the end of the inlet pipe 10, thereby containing the gas refrigerant and accumulating the accumulator. It is possible to eliminate the generation of a click-and-click sound in the inside 11. A convex portion 12 is formed at a joint 16 between the outlet pipe 12 and the upper end of the accumulator 11.
is formed, the convex portion 12a is fitted into the upper end of the accumulator 11 and joined by argon welding, so that the sleeve 14 can be omitted, and the melted aluminum enters the inside of the outlet tube 12. I try not to.

FIG. 5 is a longitudinal sectional view (A) and an enlarged sectional view (B) of a main part of an accumulator showing a third embodiment of the present invention, wherein the thickness of the upper end of the accumulator 11 is increased. Inner diameter 11c of upper end of accumulator 11 itself
Is formed thinner than the inner diameter 10b of the opening at the distal end of the inlet pipe 10, so that the sleeve 14 can be omitted and the squeaking sound inside the accumulator 11 can be eliminated, as in the second embodiment described above. Occurrence can be eliminated. In addition, a concave portion 11b is formed at a joint 16 with the outlet pipe 12 at the upper end of the accumulator 11, and
The outlet pipe 12 is fitted into the outlet pipe 12b and joined by argon welding, so that the molten aluminum does not enter the inside of the outlet pipe 12.

In the above configuration, if the inside diameter of the joint portion 16 is smaller than the inside diameter 10b of the opening at the tip end of the inlet pipe 10, the inside of the refrigerator is kept at a predetermined cooling temperature. After the compressor 5 has stopped, the gas refrigerant that increases in the cooler 9 can be confined in the cooler 9 after the compressor 5 has stopped, so that there is a problem in the accumulator 11 that has been a problem in the conventional refrigerator. The noise is eliminated and the refrigerator becomes quieter.

[0021]

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 section.

[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 a first embodiment of the present invention and enlarged sectional views (B) and (C) of a main part.

FIG. 4 is a longitudinal sectional view (A) of an accumulator showing a second embodiment of the present invention, and an enlarged sectional view (B) of a main part.

FIG. 5 is a longitudinal sectional view (A) of an accumulator showing a third embodiment of the present invention, and an enlarged sectional view (B) of a main part.

FIG. 6 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 Foaming insulation material 5 Compressor 6 Radiation pipe 7 Dryer 8 Capillary tube 9 Cooler 10 Inlet pipe 10a Oil return hole 10b Inner diameter 11 Accumulator 11a Hollow container 11b Concave part 11c Inner diameter 12 Outlet pipe 12a Convex part 12b Inside diameter 13 Suction pipe 14 Sleeve 14a Inside diameter 14b Inside diameter 14c Inside diameter 15 Liquid refrigerant 16 Joint

Claims (5)

[Claims] 1. A main body is formed by filling a foamed heat insulating material between an outer case and an inner case, 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 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 is inserted into the lower end, one end of the sleeve is inserted into the upper end, and an accumulator in which the other end of the sleeve is inserted into the outlet pipe is connected to a low-pressure side pipe that is formed by connecting a suction pipe in series. In the refrigerator, the capillary is attached to the suction pipe and embedded in the foamed heat insulating material. The sleeve is made thick, and the inner diameter of the sleeve is set at the end opening of the inlet pipe inside the accumulator. A refrigerator characterized by being formed thinner than the inner diameter of the part. 2. The refrigerator according to claim 1, wherein the inner diameter of the sleeve is gradually reduced from the upper end of the accumulator toward the outlet pipe. 3. A main body is formed by filling a foamed heat insulating material between the outer case and the inner case, 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 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 is inserted in the lower end, an accumulator in which an outlet pipe is inserted in the upper end, and a low-pressure side pipe formed by connecting a suction pipe in series are connected, and the capillary is attached to the suction pipe and In the refrigerator embedded in the foamed heat insulating material, the fitting part of the outlet pipe or the inner diameter in the vicinity of the fitting part is formed smaller than the inner diameter of the tip end opening part of the inlet pipe inside the accumulator. A refrigerator characterized by the following. 4. The refrigerator according to claim 3, wherein an inner diameter of the outlet pipe is formed smaller than an inner diameter of a front end opening of the inlet pipe. 5. The refrigerator according to claim 3, wherein an inner diameter of an upper end of the accumulator is formed smaller than an inner diameter of a front end opening of the inlet pipe.