KR101002027B1 - Suction pipe connection assembly and manufacturing method - Google Patents

Abstract

The present invention relates to a suction pipe connection assembly having improved corrosion resistance and reliability and a method of manufacturing the same. The suction pipe connection assembly according to the embodiment of the present invention includes a discharge pipe, a connection pipe and a suction pipe. Here, the discharge pipe is composed of a compressor and an evaporator in the system for performing cooling as the refrigerant circulates, connected to the evaporator to guide the movement of the refrigerant discharged from the evaporator. The connecting pipe is arranged adjacent to the discharge pipe. The suction pipe is connected to the compressor at one end thereof, and the other end is inserted into the discharge pipe through the connection pipe to guide the refrigerant flowing through the discharge pipe into the compressor, and the discharge pipe and the connection pipe are disposed between the discharge pipe and the connection pipe. Welding is made so that the suction pipe is integrally coupled, and a portion of the connection pipe is formed with a corrugated banding portion to facilitate bending of the connection pipe and the suction pipe together.

Suction Pipe, Welding, Refrigerant, Leakage, Corrosion Resistance

Description

Suction pipe connection assembly and manufacturing method therefor {suction pipe connection assembly and manufacturing method for suction pipe connection assembly}

The present invention relates to a suction pipe connection assembly and a method of manufacturing the same, and more particularly, to a suction pipe connection assembly and a method of manufacturing the improved corrosion resistance and reliability.

In general, refrigeration equipment is the most widely used as a storage device for food and articles, and generally, the refrigerant is subjected to the refrigeration cycle process of compression, condensation, expansion, and evaporation in a mechanical manner. Allow to be stored refrigerated.

1 is a configuration diagram schematically showing a configuration of a conventional heat exchanger.

As shown in FIG. 1, a refrigerant compressed at high temperature and high pressure while passing through a compressor 10 driven by an applied power is transferred to a condenser 20 through a refrigerant pipe 15 connected to the compressor 10. And liquefied into a saturated liquid.

In addition, the refrigerant is expanded while passing through the capillary tube 40 connected to the condenser 20 to be in the state of wet saturation, and enters the evaporator 30 to absorb the latent heat of evaporation of external air to vaporize it, thereby cooling the surrounding air. To cool the refrigerating or freezing compartment.

Thereafter, the refrigerant in the low temperature gaseous state discharged through the discharge pipe 135 connected to the evaporator 30 includes a joint 170 connected to the discharge pipe 135 and a suction pipe 150 connected to the joint 170. It moves through the), and is introduced into the compressor 10 through the inlet pipe 152 welded to the suction pipe 150.

In addition, the refrigerant introduced into the compressor 10 repeats a circulation cycle in which the high temperature and high pressure steam is generated by the compressor 10.

In this case, the discharge pipe 135 and the suction pipe 150 may be welded to both sides of the joint 170 to be connected to each other, where the welding 180 is mainly brazing or soldering ( soldering), and the soldering was generally made of tin (Sn).

In addition, the suction pipe 150 and the joint 170 are mostly made of copper material to improve heat exchange and corrosion resistance, and the discharge pipe 135 is generally made of aluminum.

However, these conventional heat exchangers have the following problems.

First, the flow path portion for guiding the refrigerant discharged from the evaporator to the compressor is composed of a plurality of pipe connections, such as discharge pipe, joint, suction pipe and inlet pipe, the welding point is increased by the welding of each connection to the manufacturing process Not only is this increased, there is a problem that there is always a potential risk of refrigerant leaking through multiple welding points.

Second, the joint is made of copper, and the discharge pipe is made of aluminum, which can reduce work efficiency due to the deterioration of weldability for this bimodal material, and the refrigerant can leak through the welded portion. There was a problem that could be.

Third, since the discharge pipe and the joint are formed of copper and aluminum, respectively, the potential difference is corroded and cracks occur, so durability is not only reduced, but refrigerant may leak through the cracked part, resulting in reliable product reliability. There was a problem that could be degraded.

In order to solve the above problems, the present invention is to provide a suction pipe connection assembly and a method of manufacturing the improved corrosion resistance and reliability.

In order to achieve the above technical problem, the present invention comprises a compressor and an evaporator comprising a discharge pipe for guiding the movement of the refrigerant discharged from the evaporator connected to the evaporator in a system for performing cooling as the refrigerant circulates; A connection pipe disposed adjacent to the discharge pipe; And one end is connected to the compressor, the other end is inserted into the discharge pipe is inserted into the discharge pipe comprises a suction pipe for guiding the refrigerant moving through the discharge pipe to the compressor, the discharge pipe and the Welding is made between the connection pipe and the connection pipe and the suction pipe are integrally coupled to each other, and a portion of the connection pipe is formed with a corrugated banding portion to facilitate bending of the connection pipe and the suction pipe together. Provides suction pipe connection assembly.

Here, the connection pipe and the discharge pipe is made of aluminum, the welding is preferably made of aluminum welding so that the weldability of the connection pipe and the discharge pipe is improved.

And, the suction pipe is inserted into the inside is coupled to the discharge pipe is prevented from being separated from the discharge pipe, it is preferable that the first compression portion is formed in the discharge pipe further along the circumferential direction of the discharge pipe.

In addition, the suction pipe may be further recessed in the connection pipe along the circumferential direction of the connection pipe so that the suction pipe inserted therein is not engaged with the connection pipe and does not move in the longitudinal direction of the connection pipe. .

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In addition, the present invention is a suction pipe is inserted into the inside of the connection pipe fixed to the step; Inserting one end of the suction pipe penetrating the connection pipe into the discharge pipe; Welding is performed such that the connection pipe, the suction pipe, and the discharge pipe are integrally coupled; And forming a corrugated banding portion in a portion of the connection pipe so that the suction pipe and the connection pipe inserted therein are easily bent together.

Here, it is preferable that the step of pressing the portion of the discharge pipe is further made so that the suction pipe and the discharge pipe inserted therein are not coupled to be separated.

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Referring to the effect of the suction pipe connection assembly and its manufacturing method according to the present invention.

First, one end of the suction pipe passing through the connecting pipe is inserted and coupled to the discharge pipe disposed adjacent to the connecting pipe, and the connecting pipe, the suction pipe, and the discharge pipe are integrally combined by one welding to minimize the welding point. In this way, the welding point can be minimized, thereby simplifying the process, and structurally reducing the risk of leakage of the refrigerant through the welded part.

Secondly, the connecting pipe and the discharge pipe are made of aluminum, and the surface of the suction pipe is made of corrosion resistant plating including aluminum, and the welding applied to integrally connect the connecting pipe and the discharge pipe and the suction pipe is also made of aluminum welding. As a result, the weldability can be improved, and thus, not only can the workability be improved, but also the risk of leakage of the refrigerant through the welded part can be reduced.

Third, the components of the same material can be removed from the suction pipe connection assembly including the connection pipe, the suction pipe, and the discharge pipe, thereby eliminating potential corrosion, and thus, the refrigerant leaks through the corroded portion. Not only can be prevented, but also the durability and reliability of the product can be improved.

With reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above technical problem will be described.

2 is a schematic view showing the configuration of a heat exchanger according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing a suction pipe connection assembly according to an embodiment of the present invention.

As shown in Figure 2 and 3, the suction pipe connection assembly is preferably made of a discharge pipe 35, the connection pipe 70 and the suction pipe (50). Here, the discharge pipe 35 is connected to the evaporator 30 to guide the movement of the refrigerant discharged from the evaporator 30. In addition, one end of the suction pipe 50 is connected to the compressor 10, and the other end of the suction pipe 50 is inserted into and coupled to the inside of the discharge pipe 35 to move the refrigerant through the discharge pipe 35 to the compressor 10. It is preferable to guide the inflow. In addition, it is preferable that the connection pipe 70 is fitted to the outside of the suction pipe 50. In this case, the connection pipe 70 has one end of the connection pipe 70 at the end of the discharge pipe 35. It is preferred to be located at a predetermined interval with. And, between the end of the discharge pipe 35 opposite the one end of the connection pipe 70, the welding so that the discharge pipe 35, the connection pipe 70 and the suction pipe 50 are integrally coupled ( 80) is preferred. Here, the discharge pipe 35 and the connection pipe 70 is made of the same material, the welding 80 is also preferably a welding using the same material as the discharge pipe 35 and the connection pipe 70, Through this, the weldability between the discharge pipe 35 and the connection pipe 70 can be improved, thereby reducing the risk of leakage of the refrigerant. Moreover, the discharge pipe 35, the connection pipe 70 and the suction pipe 50 may be all integrally coupled by one welding 80 as described above, so that the welding point may be minimized. In this way, the production process can be simplified and the productivity can be improved.

In detail, the suction pipe connection assembly may include a compressor 10, a condenser 20, and an evaporator 30, and is preferably applied to a system that performs cooling as the refrigerant circulates.

In addition, the suction pipe connection assembly applied to the system is installed between the compressor 10 and the evaporator to guide the refrigerant discharged from the evaporator 30 to the compressor 10.

To this end, the suction pipe connection assembly is preferably made of a discharge pipe 35, the connection pipe 70 and the suction pipe (50).

First, the refrigerant in the gas state of high temperature and high pressure in the compressor 10 is moved to the condenser 20 through a refrigerant pipe 15 connecting the compressor 10 and the condenser 20.

In addition, the refrigerant moved to the condenser 20 is released as heat and becomes a liquid state of medium temperature and high pressure, and is moved to the evaporator 30 through a capillary tube 40 connected to the condenser 20.

In addition, the refrigerant moved to the evaporator 30 is absorbed by the latent heat of the outside is evaporated and evaporated to be a low-temperature, low-pressure gas state is discharged from the evaporator 30, at this time, the refrigerant may be discharged and moved It is preferable that the discharge pipe 35 is connected to the evaporator 30.

Here, the discharge pipe 35 is preferably made of aluminum.

In addition, the suction pipe 50 connected to the compressor 10 may be connected to an end of the discharge pipe 35.

At this time, the suction pipe 50 is one end is connected to the compressor 10, the other end is preferably inserted into the discharge pipe 35 is coupled.

Through this, the refrigerant discharged through the discharge pipe 35 is introduced into the compressor 10 through the suction pipe 50.

Here, the suction pipe 50 is preferably coupled to the outer circumferential surface in close contact with the inner circumferential surface of the discharge pipe 35, for this purpose, the suction pipe 50 in the same manner as the interference fit inside the discharge pipe (35). Can be combined.

Through such a combination, the refrigerant moving inside the discharge pipe 35 may be prevented to some extent from leaking out of the discharge pipe 35 without being introduced into the suction pipe 50.

In addition, the suction pipe 50 may be made of a steel material, through which the processing such as bending due to the improvement of workability and bendability may be easily performed, thereby improving workability, as well as conventional suction. It is possible to improve production economics because the price is lower than the copper material used as the pipe material.

In addition, the surface of the suction pipe 50 is preferably plated with a corrosion-resistant alloy, by further plating the corrosion-resistant alloy, it is possible to use a steel material that can be susceptible to corrosion.

In this case, the corrosion-resistant alloy plating may be made of any one of hot-dip zinc plating or cerium alloy plating, preferably made of cerium alloy plating.

Here, the cerium alloy plating is an alloy comprising 55% by weight of aluminum, 43.4 to 44.9% by weight of zinc and other unavoidable impurities, and may further comprise 0.1 to 1.6% by weight of silicon.

On the other hand, the connection pipe 70 is preferably fitted to the outside of the suction pipe 50 so as to be disposed adjacent to the discharge pipe (35).

At this time, the connection pipe 70, one end of the connection pipe 70 is preferably coupled to maintain a predetermined distance (D) with the end of the discharge pipe (35).

Here, the interval (D) is preferably in the range of 3 ~ 10mm.

In addition, the connection pipe 70 is preferably made of aluminum.

To this end, the suction pipe 50, the other end of the suction pipe 50 is first penetrated through the inside of the connection pipe 70, before being inserted into the discharge pipe 35, a predetermined length (L) It is preferable to be exposed to the outside by).

Then, the other end of the suction pipe 50 exposed to the outside by the length (L) after passing through the connection pipe 70 is preferably inserted into the discharge pipe (35).

Here, the length L of the other end of the suction pipe 50 exposed to the outside after passing through the connection pipe 70 is preferably about 20 to 60 mm.

As such, the other end of the suction pipe 50 penetrating the connection pipe 70 is inserted into the discharge pipe 35, so that the connection pipe 70 is separated from the end of the discharge pipe 35 by the gap D. Can be combined to hold

Then, the welding 80 is preferably made in the gap D formed between the connecting pipe 70 and the discharge pipe 35.

Here, the welding 80 is preferably aluminum welding, more preferably may be any one of aluminum soldering or aluminum brazing.

As such, the discharge pipe 35 and the connection pipe 70 are made of aluminum, and aluminum welding is performed between the discharge pipe 35 and the connection pipe 70, thereby forming the same material. Welding is made in the liver so that weldability can be further improved.

And, through this, the risk of leakage of the refrigerant through the portion made of the welding 80 can be reduced, and the reliability of the place where the welding 80 is made can be improved.

In addition, since the corrosion-resistant alloy plating formed on the surface of the suction pipe 50 may be a cerium alloy plating including aluminum, the welding 80 formed between the suction pipe 50 and the discharge pipe 35 and The weldability of the welding 80 formed between the suction pipe 50 and the connection pipe 70 may also be improved.

As such, the suction pipe connection assembly may be integrally coupled to the discharge pipe 35, the connection pipe 70, and the suction pipe 50 by welding 80 formed at one point.

That is, the manufacturing process can be simplified by minimizing the number of points at which the welding is made, and structurally minimizing the welding points having the risk of leakage of the refrigerant, the risk of leakage of the refrigerant can be further reduced.

And, by removing the components made of copper in the suction pipe connection assembly, it is possible to prevent the occurrence of corrosion due to the potential difference.

Therefore, leakage of the refrigerant through the corroded portion can be prevented, and it is also possible to derive the effect of improving the durability of the product.

On the other hand, despite the surrounding environment of the evaporator 30 in which dew condensation and moisture residues exist, the suction pipe 50 located near the discharge pipe 35 has 10 cycles by the corrosion resistant plating. It is preferable to have corrosion resistance more than).

Here, the term "corrosion resistance" of 10 cycles or more means that red corrosion is observed after 10 cycles, that is, 240 hours before application of corrosion resistance to confirm the presence of red-blue (red rust) with 1 cycle of 16 hours of rest after 8 hours of spraying. It does not occur.

The suction pipe assembly is formed by coupling the outer surface of the capillary tube 40 to the outer surface of the suction pipe 50 or by partially inserting the capillary tube 40 into the suction pipe 50. Can be.

In this case, the suction pipe assembly may be fixed to the inside of the molding material 60, it is preferable to have a corrosion resistance of 10 cycles or more as described above.

Here, the molding material 60 may be made of a foam material.

In addition, one end of the suction pipe 50 connected to the compressor 10 may be further coated with a resin paint.

Here, the resin may be made of a synthetic resin in the form of colorless nano resin.

And, the synthetic resin can be made mainly including a nylon resin.

The resin coating material can prevent the corrosion-resistant alloy plating is oxidized to further improve the corrosion resistance of the suction pipe 50, through which one end of the suction pipe 50 is coupled to the compressor 10. In addition, it becomes possible to maintain corrosion resistance of 10 cycles or more as described above.

On the other hand, it is preferable that the first compression portion 37 is further formed in the discharge pipe 35 so that the suction pipe 50 inserted into the discharge pipe 35 is prevented from being separated from the discharge pipe 35. .

Here, the first crimping portion 37 may be recessed along the circumferential direction of the discharge pipe 35.

In addition, the suction pipe 50 may also have a first catching part 52 formed to correspond to the first compressing part 37 to be engaged with the first compressing part 37. The suction pipe 50 may be prevented from being separated from the discharge pipe 35.

The first crimping portion 37 is formed in an annular shape along the circumferential direction of the discharge pipe 35 or a plurality of spots are formed along the circumferential direction of the discharge pipe 35 at predetermined intervals. It can be formed recessed.

In addition, the first catching portion 52 may be formed together when the first compressing portion 37 is generated, or may be previously formed separately from the first compressing portion 37. In this case, the When the suction pipe 50 is inserted into the discharge pipe 35, the first catching part 52 may be coupled to and fixed to the first pressing part 37.

In addition, a portion of the connection pipe 70 is preferably bent together with the suction pipe 50, through which the suction pipe 50 may be prevented from being separated from the connection pipe 70 or separated. Can be.

In addition, the banding portion 75 having a corrugated shape may be further formed on a portion of the connection pipe 70 to be bent so that the bending of the connection pipe 70 may be easier.

Here, the corrugated shape (or bellows shape) may be formed only on the outer surface of the connection pipe 70, or both on the outer and inner surfaces of the connection pipe 70.

In this case, when the bellows shape is formed only on the outer surface of the connection pipe 70, the bending portion 75 may be formed before the suction pipe 50 is inserted into the connection pipe 70. have.

In addition, when the bellows shape is formed on the inner and outer surfaces of the connection pipe 70, the bending portion 75 is separately provided after the suction pipe 50 is inserted into the connection pipe 70. It can be formed by a pressing device (for example, a press device or a rolling device).

Therefore, when the bending part 75 is formed by the pressurizing device after the suction pipe 50 is inserted into the connection pipe 70 as described above, the suction pipe 50 may also be part of the suction pipe 50. A bellows shape corresponding to the bending portion 75 may be formed.

In addition, a second pressing part 72 is further provided on the connection pipe 70 so that the suction pipe 50 inserted into the connection pipe 70 does not move in the longitudinal direction of the connection pipe 70. Preferably formed.

Here, the second crimping portion 72 may be recessed along the circumferential direction of the connection pipe 70.

In addition, it is preferable that the suction pipe 50 also has a second catching part 53 formed to correspond to the second compressing part 72 so that the suction pipe 50 is engaged with the second compressing part 72.

The second crimp portion 72 is formed in an annular shape along the circumferential direction of the connecting pipe 70, or has a spot shape at a predetermined interval along the circumferential direction of the connecting pipe 70. Multiple dogs can be formed recessed.

In addition, the second catching part 53 may be formed together when the second compressing part 72 is generated, or may be formed separately from the second compressing part 72. In this case, the suction pipe When the 50 is inserted into the connection pipe 70, the second catching portion 53 is coupled to the second pressing portion 72 to be fixed.

4 is a flowchart illustrating a method of manufacturing a suction pipe connection assembly according to an embodiment of the present invention.

As shown in Figure 4, it is preferable that the step (S110) that one end of the suction pipe is inserted into the connection pipe to be fixed.

At this time, one end of the suction pipe inserted into the connection pipe is preferably exposed to the outside by a predetermined length (for example, 20 ~ 60mm) after passing through the connection pipe.

Then, after passing through the connection pipe, it is preferable that the step (S120) in which one end of the suction pipe exposed to the outside is inserted and coupled to the discharge pipe is performed.

Here, as the suction pipe is inserted into the discharge pipe, it is preferable that the suction pipe is inserted into the discharge pipe so that a predetermined interval (for example, 3 to 10 mm) is formed between the connection pipe and the discharge pipe.

And, it is preferable that the step (S130) of the welding is made in the gap formed between the connecting pipe and the discharge pipe, the connection pipe and the suction pipe and the discharge pipe through the welding can be combined integrally.

On the other hand, the suction pipe and the discharge pipe inserted therein is coupled to the engaging step of the suction pipe so that the suction pipe is not separated from the discharge pipe (S140) may be further made.

In addition, the step (S150) may be further made to form a corrugated banding portion in a portion of the connection pipe, through which the connection pipe and the suction pipe inserted into the connection pipe may be more easily bent together. Can be done.

Here, the bending portion may be selectively formed in advance before the suction pipe is inserted into the connection pipe.

In addition, a step (S160) of compressing a portion of the connection pipe may be further performed so that the suction pipe inserted therein is not engaged with the connection pipe and does not move in the longitudinal direction of the connection pipe.

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.

1 is a schematic view showing the configuration of a conventional heat exchanger.

Figure 2 is a schematic diagram showing the configuration of a heat exchanger according to an embodiment of the present invention.

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

Figure 4 is a flow chart showing a method of manufacturing a suction pipe connection assembly according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: compressor 20: condenser

30: evaporator 35, 135: discharge pipe

37: first pressing portion 40: capillary tube

50,150: suction pipe 52: first catching part

53: second catching part 70: connecting pipe

72: second crimping portion 75: banding portion

80: welding 152: inlet pipe

170: joint

Claims (8)

A system comprising a compressor and an evaporator to perform cooling as the refrigerant circulates, the discharge pipe connected to the evaporator to guide the movement of the refrigerant discharged from the evaporator; A connection pipe disposed adjacent to the discharge pipe; And One end is connected to the compressor, the other end is inserted into the discharge pipe is inserted into the discharge pipe comprises a suction pipe for guiding the refrigerant flowing through the discharge pipe to the compressor, Welding is made between the discharge pipe and the connection pipe so that the discharge pipe, the connection pipe and the suction pipe are integrally coupled to each other. And a corrugated banding portion is formed in a portion of the connection pipe to facilitate bending of the connection pipe and the suction pipe together. The method of claim 1, The connection pipe and the discharge pipe is made of aluminum, suction pipe connection assembly, characterized in that the welding is made of aluminum welding to improve the weldability of the connection pipe and the discharge pipe. The method of claim 1, The suction pipe connection assembly, characterized in that the suction pipe is further formed in the discharge pipe further recessed along the circumferential direction of the discharge pipe so that the suction pipe inserted into the suction pipe is prevented from being separated from the discharge pipe. The method according to any one of claims 1 to 3, The suction pipe is further recessed in the connection pipe along the circumferential direction of the connection pipe so that the suction pipe inserted therein is not engaged with the connection pipe and does not move in the longitudinal direction of the connection pipe. Pipe connection assembly. delete A suction pipe is inserted into and fixed to the inside of the connection pipe; Inserting one end of the suction pipe penetrating the connection pipe into the discharge pipe; Welding is performed such that the connection pipe, the suction pipe, and the discharge pipe are integrally coupled; And And forming a corrugated banding portion in a portion of the connection pipe to facilitate bending of the suction pipe and the connection pipe inserted therein. The method of claim 6, And a step of pressing the portion of the discharge pipe so that the suction pipe and the discharge pipe inserted therein are not coupled to be separated from each other. delete

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