JP2002364950A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator wherein sounds are prevented from being caused by flow of a refrigerant in an accumulator after stopping a compressor. SOLUTION: The accumulator 11 comprises a hollow container 11a, an inlet pipe 10 having one end connected to a cooler side and the other end inserted in an interior of the container 11a, and an outlet pipe 12 having one end fitted in the interior of the container 11a and the inlet pipe 10 and the other end connected to a suction pipe. A pipe 14 is arranged outside of the inlet pipe 10. The pipe 14 has one end fitted between the lower end of the container 11a and the other end extended toward the upper end of the container 11a of the accumulator 11. A space is formed between the inlet pipe 10 and the pipe 14. An oil returning port 14a is provided at a position lower than that of an oil returning port 10a of the inlet pipe 10. The pipe 14 has a length not shorter than the length of the inlet pipe 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 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 components of the refrigeration cycle. The main body 1 is composed of an outer box 2, an inner box 3, a foam insulating material 4 filled between them, and the like. 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 also functions as a condenser, in series between the discharge side of the compressor 5 and the inlet of the cooler 9 is connected, and the cooling is performed. An accumulator 11 in which an inlet pipe 10 having an oil return hole 10a formed in a lower end thereof is inserted between an outlet of the compressor 9 and a suction side of the compressor 5, and an outlet pipe 12 is fitted in an upper end thereof; 13 are connected in series to form a refrigeration cycle. 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.

[0005] When the gas phase and the liquid phase are separated from each other, when the difference between the pressure at the distal end opening of the inlet pipe 10 and the pressure from the outlet pipe 12 is large, the liquid flows from the distal end opening of the inlet pipe 10 to the gas phase. 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, 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 formed by connecting a dryer, a capillary tube and the like is connected, and an inlet pipe having an oil return hole formed inside a lower end is inserted between an outlet of the cooler and a suction side of the compressor. An accumulator having an outlet pipe fitted therein and a low-pressure side pipe connected to a suction pipe are connected, and the capillary is attached to the suction pipe and the refrigerator is embedded in the foamed heat insulating material. Outside the inlet tube,
One end is fitted between the lower end of the accumulator and the inlet pipe, and the other end is provided with a pipe extending toward the upper end of the accumulator, and a predetermined pipe is provided inside the pipe and outside the inlet pipe. A configuration in which an oil return hole is provided below the pipe at a position lower than the oil return hole of the inlet pipe, and the length of the pipe is formed to be equal to or longer than the length of the inlet pipe. It has become.

The oil return hole of the pipe is formed smaller than the oil return hole of the inlet pipe.

[0008] The oil return hole of the pipe and the oil return hole of the inlet pipe are formed with inclined surfaces that penetrate upward from below.

[0009] The oil return hole of the pipe and the oil return hole of the inlet pipe are configured to be elliptical.

[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 (B) of a main part, showing a flow of a gas refrigerant according to an embodiment of the present invention. It is a principal part enlarged sectional view (D) which shows the part enlarged sectional view (C) and the other Example of this invention, and the principal part enlarged longitudinal section (E) which shows the shape of the oil return hole of this invention. .

FIG. 1 shows a schematic structure of a refrigerator, wherein 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. 2 and 3A. 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) and 3 (C), an embodiment according to the present invention is arranged such that one end of the inlet tube 10 is connected to the lower end of the hollow container 11a of the accumulator 11 and the inlet tube 10 is connected to the outside. And a pipe 14 having the other end extending toward the upper end of the hollow container 11a of the accumulator 11 is provided. Outside the inlet pipe 10 and inside the pipe 14, By providing a predetermined gap, the gas refrigerant 16 leaking from the oil return hole 10a of the inlet pipe 10
Is guided upward through the gap.

The oil return hole 14 is located below the pipe 14 at a position lower than the oil return hole 10a of the inlet pipe 10.
The gas refrigerant 16 leaking from the oil return hole 10a of the inlet pipe 10 is provided with the oil return hole 1 of the pipe 14.
4a is prevented from leaking.

Further, the length of the pipe 14 is formed to be the same as the length of the inlet pipe 10, or FIG.
As shown in (D), by forming the length of the pipe 14 to be equal to or longer than the length of the inlet pipe 10, a gap provided outside the inlet pipe 10 and inside the pipe 14 is reduced. The gas refrigerant 16 leaked from the oil return hole 10a of the inlet pipe 10 is easily prevented from being ejected from the liquid refrigerant 15 into the space. In addition, the lengths of the inlet pipe 10 and the pipe 14 always extend from the surface of the liquid refrigerant 15.

The oil return hole 14a of the pipe 14
Is formed smaller than the oil return hole 10 a of the inlet pipe 10, so that the gas refrigerant 16 leaking from the oil return hole 10 a of the inlet pipe 10 is less likely to enter the oil return hole 14 a of the pipe 14. The oil return hole 14a of the pipe 14
And an oil return hole 10a of the inlet pipe 10 to form an inclined surface that penetrates upward from below, and the oil (lubricating oil of the compressor 5) mixed in the refrigerant is used when the compressor 5 starts up. It is easy to return to the compressor 5 side (return pipe).

Further, as shown in FIG. 3E, an oil return hole 14a of the pipe 14 and an oil return hole 1 of the inlet pipe 10 are provided.
The shape of the gas refrigerant 16a is made elliptical, and the gas refrigerant 16 becomes easy to come out from the oil return hole 10a of the inlet pipe 10, the gas noise can be reduced, and the oil mixed in the refrigerant is removed from the oil of the pipe 14. It is easy to return from the return hole 14a.

In the above configuration, the relationship between the cooler 9 and the accumulator 11 and the embodiment of the present invention have been described. As described above, the pipe 14 is provided outside the inlet pipe 10 and the pipe 14 is provided. Oil return hole 14
By setting a at a position lower than the oil return hole 10a of the inlet pipe 10, the inside of the refrigerator reaches a predetermined cooling temperature, and after the compressor 5 stops, the pressure inside the cooler 9 increases due to pressure balance. The gas refrigerant 16 can be prevented from falling out of the oil return hole 10a of the inlet pipe 10 and further from the oil return hole 14a of the pipe 14, and abnormal noise generated at that time can be suppressed. In addition, it is possible to prevent the generation of a rattling sound in the accumulator 11, which is a problem in the conventional refrigerator.

[0019]

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 an embodiment of the present invention, and an enlarged sectional view of a main part (B) of the accumulator, showing a main part enlarged sectional view showing a flow of gas refrigerant in the embodiment of the present invention. (C)
FIG. 7 is an enlarged sectional view (D) of a main part showing another embodiment of the present invention, and is an enlarged vertical sectional view (E) of a main part showing a shape of an oil return hole of the present 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 5 Compressor 6 Radiation pipe 7 Dryer 8 Capillary tube 9 Cooler 10 Inlet pipe 10a Oil return hole 11 Accumulator 11a Hollow container 12 Outlet pipe 13 Suction pipe 14 Pipe 14a Oil return hole 15 Liquid refrigerant 16 Gas 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 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 formed by connecting a dryer, a capillary tube and the like is connected, and an inlet pipe having an oil return hole formed inside a lower end is inserted between an outlet of the cooler and a suction side of the compressor. An accumulator having an outlet pipe fitted therein and a low-pressure side pipe connected to a suction pipe are connected, and the capillary is attached to the suction pipe and the refrigerator is embedded in the foamed heat insulating material. Outside the inlet pipe, a pipe is fitted at one end between the lower end of the accumulator and the inlet pipe, and the other end is provided with a pipe extending toward the upper end of the accumulator. A predetermined gap is provided outside the inlet pipe. A gap is provided, an oil return hole is provided below the pipe at a position lower than the oil return hole of the inlet pipe, and the length of the pipe is formed to be longer than the length of the inlet pipe. A refrigerator characterized by that: 2. The refrigerator according to claim 1, wherein an oil return hole of the pipe is formed smaller than an oil return hole of the inlet pipe. 3. The refrigerator according to claim 1, wherein the oil return hole of the pipe and the oil return hole of the inlet pipe are formed with inclined surfaces that penetrate upward from below. 4. The refrigerator according to claim 1, wherein the shape of the oil return hole of the pipe and the shape of the oil return hole of the inlet pipe are elliptical.