KR20070102236A - Suction pipe assembly - Google Patents

Abstract

A suction pipe assembly is provided to increase heat exchange efficiency by forming a capillary pipe directly contacting with refrigerant flowing inside the suction pipe and to increase durability by preventing abrasion of a blade equipped within a compressor. A suction pipe assembly with improved heat exchange efficiency includes a suction pipe(10) guiding a refrigerant discharged from an evaporator to a compressor, an auxiliary pipe(20) inserted to the inside of the suction pipe through pipe expansion parts(12) formed on two ends of the suction pipe, and a capillary pipe(30) penetrating the inside of the suction pipe and flowing the refrigerant discharged from the condenser to the evaporator.

Description

Suction pipe assembly

1 is an exemplary view showing an embodiment of a conventional suction pipe assembly.

Figure 2 is an exemplary view showing another embodiment of a conventional suction pipe assembly.

Figure 3 is a main cross-sectional view showing an embodiment of a suction pipe assembly according to the present invention.

4A is a cross-sectional view taken along the line A-A of FIG.

4B is a cross-sectional view taken along the line B-B in FIG. 3.

4C is a cross-sectional view taken along the line C-C in FIG.

5 is a perspective view showing an auxiliary pipe according to the present invention.

Figure 6 is a sectional view of the main portion showing another embodiment of the present invention.

7A is a cross-sectional view taken along the line D-D of FIG. 6.

7B is a cross-sectional view taken along the line E-E of FIG.

FIG. 7C is a sectional view taken along the line F-F in FIG. 6; FIG.

<Explanation of symbols for main parts of the drawings>

10,15,100: suction pipe 12: expansion pipe

17: through part 20: auxiliary pipe

22: guide groove 30,110: capillary pipe

The present invention relates to a suction pipe assembly, and more particularly, to a suction pipe assembly with improved heat exchange efficiency.

Refrigeration equipment that stores products in a refrigerated state is the most widely used as a storage device for food and goods, and is usually used to mechanically pass through the refrigeration cycle of compression, condensation, expansion and evaporation in a mechanical manner. Allow the item to be stored fresh.

Generally, the refrigerant is compressed from the low temperature and low pressure refrigerant to the high temperature and high pressure refrigerant through a compressor driven by an applied power source. The refrigerant, which is delivered to the condenser through a connecting pipe connected to the compressor, is liquefied into a saturated liquid of low temperature and high pressure in the condenser.

In addition, the refrigerant expands while passing through a capillary pipe connected to the condenser, and becomes a wet / saturated vapor state at low temperature and low pressure, and absorbs latent heat of external air as it evaporates and enters an evaporator, thereby cooling ambient air. To cool the refrigerating compartment or freezing compartment.

In addition, the refrigerant discharged into the suction pipe connected to the evaporator is introduced into the compressor in a low-temperature gas phase refrigerant state, and the cycle of becoming a high temperature and high pressure steam in the compressor is repeated.

Here, a part of the suction pipe and the capillary pipe used in the conventional refrigeration equipment is assembled to form the suction pipe assembly, thereby mutual heat exchange is made.

1 and 2, the outer side of the capillary pipe 100 is provided on the outside of the suction pipe 100 to be in contact with the suction pipe 100 in parallel and welded along a surface in which the constituent members are in contact with each other. The welding part 120 is formed and fixed, or after placing the component inside the heat shrink tube 130, the heat shrink tube 130 contracts and adheres to the outside of the component to fix the component. It is made and formed.

Through this, the refrigerant of the capillary pipe 110 is supercooled by the low temperature refrigerant flowing in the suction pipe 100, and the refrigerant of the suction pipe 100 is cooled by the high temperature refrigerant of the capillary pipe 110. Heat exchange takes place to overheat.

However, the above-described conventional suction pipe assembly has the following problems.

First, in the suction pipe assembly, when the welding part between the suction pipe and the capillary pipe is long, welding is uneven and there is a problem that it is difficult to guarantee uniform welding quality. In addition, when the pipe is applied to the rear surface of the refrigerating device such as a refrigerator, the protrusion on the suction pipe causes interference with other components, thereby preventing the effective use of the installation space.

Second, as the suction pipe is provided in contact with the capillary pipe, there is a problem in that efficient heat exchange is not achieved because heat exchange is performed through heat transfer through each pipe, rather than direct heat exchange in direct contact with a refrigerant.

Third, since the outer surface of the suction pipe and the capillary pipe that are contacted for heat exchange are each circumferential, there is a problem in that efficient heat exchange is not achieved due to a small contact area due to contact of the constituent members.

Fourth, when the refrigerant discharged from the evaporator is introduced into the compressor due to the inefficient heat exchange, there is a serious problem that may wear the blade provided in the compressor.

The present invention is to solve the above problems, it is an object of the present invention to provide a suction pipe assembly with improved heat exchange efficiency.

In order to achieve the above object, the present invention is at least one end of the suction pipe is formed expansion tube is formed by expansion, the auxiliary pipe is inserted into the expansion pipe is connected, the capillary pipe is the connection portion It is provided through the suction pipe assembly, characterized in that it is internal to the suction pipe.

Here, one end of the auxiliary pipe is inserted into the expansion pipe is connected, the portion of the end of the auxiliary pipe is formed to be recessed inward so that the capillary pipe can pass through the connection portion into the suction pipe. It is preferable that a guide groove is provided.

In addition, a portion of the capillary pipe and the end circumferential surface of the expansion pipe portion, which are inherent in the expansion pipe and the guide groove, may prevent brazing of the refrigerant and fix the capillary pipe to fix the capillary pipe.

The other end of the suction pipe may include a through part formed by cutting one side of an outer circumferential surface of the suction pipe so that the capillary pipe penetrates and bending the inside of the suction pipe.

In addition, it is preferable that the capillary pipe connected to the through part and the through part prevent braking of the refrigerant and perform brazing welding to fix the capillary pipe. The suction pipe may be made of steel, and the auxiliary pipe may be made of copper.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can realize the above object specifically.

Figure 3 is a cross-sectional view of the main portion showing an embodiment of a suction pipe assembly according to the present invention, Figure 5 is a perspective view showing an auxiliary pipe according to the present invention.

As shown in FIG. 3, the suction pipe assembly preferably includes a suction pipe 10, an auxiliary pipe 20, and a capillary pipe 30. Here, the suction pipe 10 guides the refrigerant discharged from the evaporator to the compressor, and the auxiliary pipe 20 is inserted into and connected to the expansion part 12 of the suction pipe 10 and receives the refrigerant from the condenser. A portion of the capillary pipe 30 connecting to the evaporator is provided inside the suction pipe 10.

In detail, one end of the suction pipe 10 is connected to the evaporator and the other end is connected to the compressor. The low temperature refrigerant discharged from the evaporator is returned to the compressor through the suction pipe 10.

On the other hand, both ends of the suction pipe 10 is formed with an expansion tube 12 which is formed by expanding in the radial direction of the suction pipe 10. In addition, the auxiliary pipe 20 may be inserted into and connected to the inside of the expansion pipe 12.

In this case, the suction pipe 10 may be directly connected to the evaporator and the compressor or may be combined with the connector provided in the evaporator and the compressor. In addition, the other end of the auxiliary pipe 20 inserted into the expansion pipe 12 may be connected to the evaporator or the compressor.

The suction pipe 10 may be made of steel, and the auxiliary pipe 20 may be made of copper.

On the other hand, as shown in Figure 5, a portion of one end of the auxiliary pipe 20 is inserted into the expansion pipe portion 12 is coupled to the guide groove 22 is formed recessed into the auxiliary pipe 20 It is preferred to be provided.

Here, the guide groove 22 may be formed parallel to the axial direction of the auxiliary pipe (20). In addition, one end of the guide groove 22 is formed in the axial direction of the auxiliary pipe 20 at a predetermined depth and length from the end of the auxiliary pipe 20 to the outer surface of the auxiliary pipe 20 It is preferable to form a slope of and gently provided.

In addition, the inner surface of the guide groove 22 is preferably provided so that a predetermined rounded cross section is formed in the longitudinal direction of the guide groove 22.

3, the capillary pipe 30 is provided through the inside of the suction pipe 10 through one end of the suction pipe 10. The auxiliary pipe 20 is inserted into the suction pipe 10 through the expansion pipe 12 formed at both ends of the suction pipe 10.

In addition, one end of the auxiliary pipe 30 in which the guide groove 22 is formed is inserted into the expansion pipe 12.

Here, the auxiliary pipe 20 is preferably inserted into the expansion tube 12 so that a part of the capillary pipe 30 can be located inside the guide groove 22 is coupled. Through this, the capillary pipe 30 embedded in the guide groove 22 is bent in accordance with the inner shape of the guide groove 12 is inserted into the guide groove 22 and the expansion portion 12 In between.

In addition, the bending of the capillary pipe 30 by the shape of the guide groove 22 is formed in the outer peripheral surface of the auxiliary pipe 20 at a predetermined inclination to the rear side with respect to the direction in which the guide groove 22 is inserted. Can be done easily.

One end of the other auxiliary pipe 20 on which the guide groove 22 is formed is also inserted into and coupled to the expansion pipe 12 formed at the other end of the suction pipe 10. The capillary pipe 30 to be inserted into the 22 is also provided bent in accordance with the inner shape of the guide groove 22.

Here, each of the guide grooves 22 inserted into and coupled to the expansion pipes 12 formed at both ends of the suction pipe 10 may be provided to face the axial direction of the suction pipe 10. .

Through this, the capillary pipe 30 embedded in the suction pipe 10 through each of the guide grooves 22 may maintain a straight shape, and the capillary pipe 30 may maintain a straight shape. As a result, kinetic energy loss of the refrigerant moving inside the capillary pipe 30 can be prevented.

On the other hand, a portion of the capillary pipe 30 to be provided in the guide groove 22 is formed to be bent in advance to fit the guide groove 22, the capillary pipe 30 is the inside of the suction pipe 10 The auxiliary pipe 20 may be inserted into the expansion pipe 12 and connected to the expansion pipe 12.

Even in this case, the guide grooves 22 inserted into and coupled to the expansion pipes 12 formed at both ends of the suction pipe 10 are provided to face the axial direction of the suction pipe 10, Kinetic energy loss of the refrigerant flowing in the capillary pipe 30 can be reduced.

The refrigerant flowing in the suction pipe 10 maintains a low temperature as it approaches the evaporator, and the refrigerant flowing in the capillary pipe 30 maintains a high temperature as it approaches the condenser. Done.

Therefore, the refrigerant flow direction of the suction pipe 10 and the refrigerant flow direction of the capillary pipe 30 provided inside the suction pipe 10 may be reversed.

Through this, heat exchange efficiency between the suction pipe 10 and the capillary pipe 30 may be increased.

4A is a cross-sectional view taken along the line A-A of FIG. 3, FIG. 4B is a cross-sectional view taken along the line B-B of FIG. 3, and FIG. 4C is a cross-sectional view taken along the line C-C of FIG. 3.

4A to 4C, the outer circumferential surface of one end of the auxiliary pipe 20 inserted into the expansion pipe 12 is formed to contact the inner circumferential surface of the expansion pipe 12, and the capillary pipe 30 is contacted. The guide groove 22 formed to wrap is preferably formed to match the outer diameter of the capillary pipe 30 as much as possible.

As a result, a decrease in the internal area of the suction pipe 10 may be minimized, thereby reducing the flow resistance of the refrigerant flowing in the suction pipe 10.

In addition, a portion of the capillary pipe 30 is provided on the inner circumferential surface of the suction pipe 10 and the guide groove 22, so that the capillary pipe 30 is not moved inside the suction pipe 10. It can be provided without.

In addition, the outer circumferential surface of the capillary pipe 30 embedded inside the suction pipe 10 is preferably provided in contact with the inner circumferential surface of the suction pipe 10. Accordingly, resistance to the flow of the refrigerant in the suction pipe 10 may be reduced.

On the other hand, the outer circumferential surface of the capillary pipe 30 provided to the outside of the suction pipe 10 is preferably bent to be in contact with the outer circumferential surface of the suction pipe (10).

Through this, the flow of the refrigerant flowing in the capillary pipe 30 can be smoothly, and even when installed in a refrigerator, such as a refrigerator, the capillary pipe 30 is provided in close contact with the suction pipe (10). Thereby, various installation shapes can be made.

On the other hand, the outer peripheral surface of the end portion of the expansion pipe 12, including the capillary pipe 30 and the guide groove 22 penetrating through the expansion pipe 12 to the outside of the suction pipe 10 is the suction pipe Brazing welding may be performed to prevent the outflow of the refrigerant flowing in the inside of the 10 and to fix the capillary pipe 30.

In addition, brazing welding may be performed to fix the outer circumferential surface of the auxiliary pipe 20 and the outer circumferential surface of the capillary pipe 30 provided along the auxiliary pipe 20.

6 is a cross-sectional view illustrating main parts of another embodiment of the present invention, FIG. 7A is a cross-sectional view taken along the line D-D of FIG. 6, FIG. 7B is a cross-sectional view taken along the line E-E of FIG. 6, and FIG. 7C is a cross-sectional view taken along the line F-F of FIG. 6.

Some configurations of the present embodiment are the same as the first embodiment described above, and thus description thereof will be omitted.

As shown in FIGS. 6 to 7C, one end portion of the suction pipe 15 is formed with the expansion pipe portion 12, and the other end portion has a through portion 17 so that the capillary pipe 30 can be penetrated. Can be.

Here, the through part 17 is preferably formed in a portion of the outer peripheral surface of the other end of the suction pipe 15 in the same axial direction as the capillary pipe 30 provided inside the suction pipe 15. .

That is, the through part 17 is made by cutting so that the capillary pipe 30 can be penetrated, the cut surface is made of a circular or polygonal shape, partly cut so that part of the suction pipe ( 15).

In addition, the cut portion is preferably formed by bending the inside of the suction pipe (15). In addition, the capillary pipe 30 embedded in the suction pipe 15 passes through the through part 17 along the cut surface that is bent into the suction pipe 15 of the suction pipe 15. It is penetrated outward.

Meanwhile, a part of the capillary pipe 30 passing through the through part 17 and the through part 17 prevent the flow of the refrigerant flowing into the suction pipe 15 and close the capillary pipe 30. It is preferable that brazing welding is made to fix.

In addition, the capillary pipe 30 and the auxiliary pipe 20 provided to the outside of the suction pipe 15 through the through part 17 may be fixed by brazing welding.

As described above, the present invention is not limited to the above-described specific preferred embodiments, and various modifications by those skilled in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Implementations are possible and such variations are within the scope of the present invention.

Referring to the effect of the suction pipe assembly according to the present invention described above are as follows.

First, in the suction pipe assembly, a substantial portion of the capillary pipe penetrates a portion of the suction pipe and is provided inside the suction pipe, thereby reducing the protrusion on the suction pipe. Therefore, when the suction pipe assembly is applied to the refrigerating device, a wider space can be secured to facilitate piping and reduce interference with other components.

Second, the capillary pipe provided inside the suction pipe is capable of direct heat exchange by directly contacting the refrigerant flowing in the suction pipe, thereby enabling efficient heat exchange.

Third, the capillary pipe provided inside the suction pipe is in contact with a low temperature refrigerant moving inside the suction pipe, and high temperature heat due to the high temperature refrigerant moving inside the capillary pipe is applied to the capillary pipe. Since heat exchange occurs through the front surface, efficient heat exchange can be achieved.

Fourth, by the efficient heat exchange as described above, the refrigerant flowing into the compressor can be completely vaporized to prevent wear damage of the blade provided in the compressor to increase the durability.

Claims (6)

In the suction pipe assembly comprising a suction pipe for guiding the refrigerant discharged from the evaporator, and a capillary pipe coupled with the suction pipe and the refrigerant coming out of the condenser is moved to the evaporator, At least one end of the suction pipe is formed with an expansion pipe formed to be expanded, and the auxiliary pipe is inserted into and connected to the inside of the expansion pipe, and the capillary pipe penetrates through the connection portion and is internally formed inside the suction pipe. Suction pipe assembly, characterized in that. The method of claim 1, One end of the auxiliary pipe is inserted into the expansion pipe is connected, the guide groove is formed by recessing a portion of the end of the auxiliary pipe inward so that the capillary pipe can pass through the connection portion into the suction pipe Suction pipe assembly, characterized in that provided. The method of claim 2, Suction pipe assembly, characterized in that the portion of the capillary pipe and the end circumferential surface of the expansion tube and the end portion of the expansion pipe and the guide groove to prevent the leakage of the refrigerant and brazing welding for fixing the capillary pipe. The method of claim 1, Suction pipe assembly, characterized in that the other end of the suction pipe is provided with a through-section formed by cutting one side of the outer peripheral surface of the suction pipe so that the capillary pipe is penetrated into the suction pipe. The method of claim 4, wherein The suction pipe assembly, characterized in that the capillary pipe connected through the through portion and the through portion prevents the outflow of the refrigerant and brazing welding to fix the capillary pipe. The method of claim 1, The suction pipe assembly is made of a steel material and the auxiliary pipe is made of a copper material.

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