KR20130114522A - Suction pipe assembly having spirally wound capillary tube and method for manufacturing suction pipe assembly - Google Patents

Abstract

PURPOSE: A suction pipe assembly having a capillary tube wound in a spiral shape and a manufacturing method thereof are provided to improve heat exchange efficiency by increasing the contact area between a suction pipe and a capillary tube. CONSTITUTION: A suction pipe assembly having a capillary tube wound in a spiral shape comprises a suction pipe (100), a capillary tube (200), and a coupling unit. The suction pipe guides a refrigerant discharged from an evaporator to a compressor and has first and second circumference surfaces (111, 113). The second circumference surface is recessed inward from the first circumference surface and is formed in a spiral shape. The capillary tube guides the refrigerant discharged from a condenser to an evaporator and is coupled to the inner surface of the second circumference surface. The coupling unit couples the suction pipe and the capillary tubes to each other.

Description

SUCTION PIPE ASSEMBLY HAVING SPIRALLY WOUND CAPILLARY TUBE AND METHOD FOR MANUFACTURING SUCTION PIPE ASSEMBLY}

The present invention relates to a suction pipe assembly having a spirally wound capillary tube and a manufacturing method thereof, and more particularly, to a suction pipe assembly having a spirally wound capillary tube having improved heat exchange efficiency and a method of manufacturing the same.

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.

Here, the refrigerant, which is compressed at high temperature and high pressure while passing through a compressor driven by an applied power source, is delivered to the condenser through a connecting pipe connected to the compressor and liquefied into a saturated liquid.

The refrigerant expands while passing through a capillary tube connected to the condenser, and becomes a wet vapor state. The refrigerant enters the evaporator, absorbs latent heat of evaporation of external air, and vaporizes the ambient air to cool, thereby cooling the refrigerating compartment or the freezing compartment.

Thereafter, the refrigerant discharged through the suction pipe connected to the evaporator is introduced into the compressor in a low temperature gaseous refrigerant state, and the circulation cycle of the high temperature and high pressure steam is repeated in the compressor.

At this time, in order to allow heat exchange between the suction pipe and the respective refrigerant moving to the capillary tube, a portion of the capillary tube is in contact with the suction pipe to form the suction pipe assembly.

1 is a perspective view showing a conventional suction pipe assembly, Figure 2 is a cross-sectional view taken along the line A-A of FIG.

As shown in FIGS. 1 and 2, the suction pipe assembly is formed such that the suction pipe 10 and the capillary tube 20 are in close contact with each outer surface along their respective longitudinal directions.

In addition, the welding pipe 30 is made to the close contact portion of the suction pipe 10 and the capillary tube 20, such that the suction pipe 10 and the capillary tube 20 may be coupled to each other.

Here, the welding 30 may be mainly made of brazing or soldering, and the soldering is generally made of tin (Sn).

In addition, the suction pipe 10 and the capillary tube 20 are generally made of a copper material so as to improve heat exchange and corrosion resistance between the suction pipe 10 and the capillary tube 20.

However, such a conventional suction pipe assembly has the following problems.

First, the outer surfaces of the suction pipe and the capillary tube are respectively formed in a circumferential shape, so that the suction pipe and the capillary tube are in line contact with each other.

Second, the suction pipe assembly has a problem that the longer the contact length between the suction pipe and the capillary tube is, the better the welding of the closely contacted part is made and the easier it is to perform. There is this.

In order to solve the above problems, the present invention is to provide a suction pipe assembly having a spiral wound capillary tube improved heat exchange efficiency and a method of manufacturing the same.

In order to achieve the above technical problem, the present invention comprises a compressor, a condenser and an evaporator in a system for performing cooling as the refrigerant circulates, the refrigerant provided between the compressor and the evaporator is discharged from the evaporator is A suction pipe which is guided to flow into the compressor and has a second circumferential surface recessed inward along a longitudinal direction of the first circumferential surface forming an outer shape, and a refrigerant provided between the condenser and the evaporator and discharged from the condenser. The suction pipe and the capillary tube to any one or more of capillary and adhesive bonds, welding bonds, soldering bonds, brazing bonds, heat shrinkable tube bonds, and tape bonds which are guided to the evaporator and are surface-contacted to the inner circumferential surface of the second circumferential surface. It comprises a coupling means for combining the second circle The main surface provides a suction pipe assembly having a spirally wound capillary, characterized in that formed in a spiral in a predetermined pitch along the longitudinal direction of the first circumferential surface.

In addition, the capillary is branched into at least two or more and the branched capillary is respectively coupled to the different second circumferential surface formed in the suction pipe.

In addition, the suction pipe is made of any one of a steel material, aluminum material and copper material.

Meanwhile, in the present invention, a suction pipe having a second circumferential surface in which one side of the first circumferential surface forming an outer shape forms a spiral along a longitudinal direction and is recessed inward is manufactured, and the capillary is the inner circumferential surface of the second circumferential surface. And a step of inserting into the capillary tube and joining by at least one of coupling means such as adhesive bonding, welding coupling, soldering coupling, brazing coupling, heat shrinkable tube coupling, and tape coupling such that the capillary is in surface contact with the inner peripheral surface of the second circumferential surface. It provides a method for producing a suction pipe assembly having a spirally wound capillary tube.

Referring to the effect of the suction pipe assembly having a spirally wound capillary tube and a method of manufacturing the same according to the present invention.

First, the second circumferential surface is formed inside the suction pipe, and the inner circumferential surface of the second circumferential surface is formed such that the capillary tube is in surface contact, thereby increasing the contact area between the suction pipe and the capillary tube, thereby improving heat exchange efficiency.

Second, at least two capillaries may be branched, and the branched capillaries may be in surface contact with the inner circumferential surfaces of the second second circumferential surface, thereby increasing the contact area between the suction pipe and the capillary tube, thereby improving heat exchange efficiency.

Third, since the second circumferential surface has a predetermined pitch along the longitudinal direction of the suction pipe and is formed spirally, the length of contact between the suction pipe and the capillary tube is extended and the contact area is increased, thereby improving heat exchange efficiency.

1 is a perspective view showing a conventional suction pipe assembly.
2 is a sectional view taken along the line AA in Fig.
Figure 3 is a cross-sectional view of the suction pipe assembly according to an embodiment of the present invention.
4 and 5 are assembled examples of the suction pipe assembly according to an embodiment of the present invention.
6 is a longitudinal cross-sectional view of the suction pipe assembly in a state in which a capillary tube is inserted into an insertion unit according to an embodiment of the present invention.
7 is a flowchart illustrating a manufacturing process of a suction pipe assembly according to an embodiment of the present invention.
8 is a cross-sectional view of a suction pipe assembly according to another embodiment of the present invention.

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

Figure 3 is a cross-sectional view of the suction pipe assembly according to an embodiment of the present invention, Figure 4 and Figure 5 is an illustration of the assembly of the suction pipe assembly according to an embodiment of the present invention, Figure 6 is an embodiment of the present invention Figure 7 is a longitudinal cross-sectional view of the suction pipe assembly in the state in which the capillary is inserted into the insertion portion, Figure 7 is a flow chart showing a manufacturing process of the suction pipe assembly according to an embodiment of the present invention.

As shown in FIGS. 3 to 7, the suction pipe assembly includes a suction pipe 100, a capillary tube 200, and a coupling unit 300.

Here, the suction pipe 100 includes a first circumferential surface 111 forming an outer shape and a second circumferential surface 113 formed by being recessed inward in the longitudinal direction of the suction pipe 100.

The capillary 200 is inserted into the insertion portion 119 formed by the second circumferential surface 113.

Accordingly, since the outer circumferential surface of the capillary tube 200 is in surface contact with the suction pipe 100, the heat exchange area between the capillary tube 200 and the suction pipe 100 may be increased to increase heat exchange efficiency.

In addition, the coupling means 300 may be further provided at a contact portion of the capillary 200 and the second circumferential surface 113 so that the capillary 200 does not move inside the insertion portion 119.

In detail, in the suction pipe 100, one side of the first circumferential surface 111 forming the outer shape is recessed inward along the longitudinal direction of the suction pipe 100 to form the second circumferential surface 113.

At this time, the second circumferential surface 113 is formed in a spiral along the longitudinal direction of the suction pipe 100.

This, in the capillary 200 is in contact with the suction pipe 100 in the longitudinal direction, the capillary 200 is formed spirally wound around the suction pipe 100 is in contact with the suction pipe 100 and the capillary tube 200 This is to extend the length.

Accordingly, the contact area of the suction pipe 100 and the capillary tube 200 is increased, thereby improving heat exchange efficiency.

Here, the suction pipe 100 is a cooling system including a compressor (not shown), a condenser (not shown) and an evaporator (not shown), and the refrigerant discharged from the evaporator is provided between the compressor and the evaporator. It may be a conventional suction pipe for guiding the compressor into the compressor.

The suction pipe 100 may be made of at least one of steel, aluminum, and copper.

In addition, in general, since the steel material is relatively lower in price than the aluminum material or the copper material, when the suction pipe 100 is made of a steel material, the production economy may be improved.

In addition, when the suction pipe 100 is made of steel, corrosion resistance plating may be further formed.

Here, the corrosion-resistant plating may be made of at least one of hot-dip zinc plating, hot-dip zinc trivalent chromium plating, ceria plating and cerium trivalent chromium plating. 3 refers to the chromium (Cr ^{+ 3)} the croissant plated mating process is made more.

In addition, ceria plating refers to a plating including 55 wt% aluminum, 43.4 to 44.9 wt% zinc, and other unavoidable impurities. Cerium trivalent chromium plating refers to trivalent chromium (Cr) after ceria plating. ^{3 +} ) refers to plating in which chromatization is further performed.

In addition, the capillary 200 is tightly coupled to the insertion portion 119 formed by the second circumferential surface 113.

In addition, the capillary 200 is preferably made of a copper material, but is not limited thereto, and may be made of various materials (for example, aluminum or steel).

In addition, a coupling means 300 for providing an adhesive force is applied between the capillary 200 and the second circumferential surface 113 so that the capillary 200 and the second circumferential surface 113 are coupled to each other.

In this case, the coupling means 300 may be any one or more of adhesive bonding, welding bonding, soldering bonding, brazing bonding, heat shrinkable tube bonding, and tape bonding.

Here, when the coupling means 300 is made of an adhesive, the adhesive is made of a thermally conductive material so that the degradation of the thermal conductivity between the capillary 200 and the suction pipe 100 can be minimized.

In addition, the adhesive is preferably applied to a thickness such that the capillary 200 provides sufficient adhesive force to adhere to the second circumferential surface 113, the heat transfer is minimized by the coupling means 300.

To this end, the adhesive may include a hardening material and a filler, and in this case, the filler may be made of any one of copper powder, aluminum powder, carbon black, and ceramic so as to ensure thermal conductivity.

Of course, the adhesive may be made without distinguishing between the hardening material and the filling material, and may be used as a normal pure adhesive used for adhering an object.

Meanwhile, referring to FIGS. 4 and 5, when the capillary tube 200 is coupled to the suction pipe 100, first, the capillary tube 200 may be coupled to the insertion unit 119 of the suction pipe 100. Insertion portion 119 is formed to be open at a gap (D) or more than the outer diameter of the capillary 200.

To this end, the second circumferential surface 113 is formed of a curved portion 115 having a shape corresponding to the capillary 200 and a straight portion 114 formed in parallel with each other from both ends of the curved portion 115.

In addition, the distance D between each of the straight portions 114 and the connecting portion 118 to which the first circumferential surface 111 is connected is formed to be greater than the outer diameter of the capillary 200.

Through this, the capillary 200 can be easily inserted into the insertion portion 119.

In this case, the coupling means 300 may be applied to the inner circumferential surface of the second circumferential surface 113 in advance, or may be applied after the capillary tube 200 is inserted into and coupled to the insertion portion 119. It can be appropriately made according to the type of.

In addition, after the capillary tube 200 is inserted into the insertion unit 119, a process of pinching the connection unit 118 such that the capillary tube 200 is not separated from the insertion unit 119 may be selectively added or subtracted. Of course, the production process can be simplified if the process is omitted.

In the manufacturing process of the suction pipe assembly, first, the second circumferential surface 113 is helically formed in a spiral at a predetermined pitch P along the longitudinal direction of the first circumferential surface 111 forming the outer shape. The suction pipe 100 to be formed is produced. (S110)

Next, the capillary 200 is inserted into the second circumferential surface 113. (S120)

Next, the capillary tube 200 is coupled to the suction pipe by any one or more of coupling means such as adhesive coupling, welding coupling, soldering coupling, brazing coupling, heat shrink tube coupling, and tape coupling such that the capillary 200 is in surface contact with the inner circumferential surface of the second circumferential surface 113. The assembly is manufactured. (S130)

For example, after the capillary 200 is coupled to the suction pipe 100 by an adhesive, the capillary 200 and the suction pipe 100 may be further bonded by a tape.

Here, when the coupling means is an adhesive bond, the coupling means is made to be applied to at least one of the outer circumferential surface of the capillary tube 200 or the inner circumferential surface of the second circumferential surface 113.

In addition, when the coupling means is one of a welding joint, a solder joint or a brazing joint, the coupling unit includes the capillary tube 200 and the second circle in a state in which the capillary tube 200 is coupled to the inner circumferential surface of the second circumferential surface 113. It may be applied to the portion where the main surface 113 abuts.

In addition, when the coupling means is either heat shrink tube coupling or tape coupling, the coupling means is a capillary tube 200 and suction pipe 100 in a state in which the capillary tube 200 is coupled to the inner circumferential surface of the second circumferential surface 113. It may be applied to surround the outer circumferential surface of the.

8 is a cross-sectional view of a suction pipe assembly according to another embodiment of the present invention.

The suction pipe assembly includes a suction pipe 150, a capillary tube 200 (see FIG. 5), and a coupling means 300.

Here, the suction pipe 150 has a first circumferential surface 151 forming an outer shape, and a second circumferential surface 152 and a third formed in a spiral shape along the longitudinal direction of the suction pipe 100 and recessed inward. A circumferential surface 153 is included.

At this time, the third circumferential surface 153 has the same shape as the second circumferential surface 152 and is formed in the suction pipe 150.

In addition, the capillary 200 (see FIG. 5) is branched into the first capillary 210 and the second capillary 220 at a certain point to be in surface contact with the suction pipe 150.

In other words, the branched first capillary tube 210 and the second capillary tube 220 are inserted and coupled to the second circumferential surface 152 and the third circumferential surface 153, respectively, to expand the heat exchange area with the suction pipe 150. Combined to increase efficiency.

The first capillary tube 210 and the second capillary tube 220 branched to a point of the capillary tube 200 (see FIG. 5) are heat-exchanged with the suction pipe 150 and then the first capillary tube 210 and the second capillary tube. 220 is merged and connected to the capillary 200 (see FIG. 5).

Therefore, the refrigerant moving inside the capillary tube 200 (see FIG. 5) may be divided into the first capillary tube 210 and the second capillary tube 220, and then combined with the capillary tube 200 (see FIG. 5).

At this time, the circumferential surface recessed inward to the suction pipe 150 may be formed in plurality depending on the number of branched tubes of the capillary tube 200 (see FIG. 5).

As such, the first capillary tube 210 and the second capillary tube 220 respectively inserted into the second circumferential surface 152 and the third circumferential surface 153 may be adhesively bonded, welded, soldered, brazed or thermally contracted. It may be coupled while the surface contact by any one or more coupling means 300 of the tube coupling and tape coupling.

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.

100, 150: suction pipe 111, 151: first circumferential surface
113, 152: Second circumference 153: Third circumference
200: capillary 210: first capillary
220: second capillary 300: coupling means

Claims (4)

In the system for cooling the refrigerant as the refrigerant circulates, including a compressor, a condenser and an evaporator, provided between the compressor and the evaporator to guide the refrigerant discharged from the evaporator to the compressor, forming an appearance A suction pipe having a second circumferential surface recessed inward in a length direction of the first circumferential surface;
A capillary tube disposed between the condenser and the evaporator to guide the refrigerant discharged from the condenser to move to the evaporator and to be in surface contact with the inner circumferential surface of the second circumferential surface; And
It comprises a coupling means for coupling the suction pipe and the capillary by any one or more of an adhesive bond, a weld bond, a solder bond, a braze bond, a heat shrink tube bond and a tape bond,
The second circumferential surface is suction pipe assembly having a spiral wound capillary, characterized in that formed in a spiral in a predetermined pitch along the longitudinal direction of the first circumferential surface. The method of claim 1,
And at least two branched capillaries and the branched capillaries are respectively coupled to different second circumferential surfaces formed on the suction pipes. The method of claim 1,
The suction pipe assembly has a spiral pipe capillary, characterized in that made of any one of steel, aluminum and copper material. Manufacturing a suction pipe on which one side of the first circumferential surface forming a contour forms a spiral along the longitudinal direction and is formed with a second circumferential surface recessed inward;
Inserting the capillary into an inner circumferential surface of the second circumferential surface; And
The capillary is spirally wound, comprising the step of coupling by any one or more of the bonding means such as adhesive bond, weld bond, solder bond bond, braze bond, heat shrink tube bond and tape bond such that the capillary tube is in surface contact with the inner peripheral surface of the second circumferential surface Method of manufacturing a suction pipe assembly having a capillary tube.

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