KR20140027677A - Manufacturing method of distributing pipe for refrigerant pipe - Google Patents

Abstract

The present invention relates to a manufacturing method of a branching pipe for a refrigerant pipe. The method is specifically about manufacturing upper and lower pipes respectively which are formed in upper and lower parts and integrated by joining one another. The method is provided to easily manufacturing of the branching pipe thereby comprising the steps of: forming extensions of a fluid path part and two extension parts around the upper and lower pipes respectively; joining and braze welding upper and lower pipes; manufacturing a connector combined to the integrated upper and lower pipe by braze welding; and braze welding the connector to each stepped portion on the inner circumferential surface of the entrance region of the integrated upper and lower pipe by being mutually brazed and on the inner circumferential surface of the exit for separated refrigerant respectively. [Reference numerals] (S100) Step for manufacturing an upper pipe; (S200) Step for manufacturing a lower pipe; (S300) Step for brazing the upper and lower pipes; (S400) Step for manufacturing a connector; (S500) Step for brazing the connector to the upper and lower pipes

Description

Manufacturing method of Distributing pipe for refrigerant pipe

The present invention relates to a manufacturing method for easily manufacturing the branch connection pipe of the refrigerant pipe branched at one end through the upper and lower pipes which are brazed and joined in contact with each other.

In a refrigeration and air conditioning system using a compressed high-temperature and high-pressure refrigerant gas as a medium, the thermal conductivity of the refrigerant tube directly affects the efficiency of the system. In addition, since the refrigerant pipe is accompanied by processing processes such as cutting, bending, swaging, flaring, and the like for piping and joint work, bronze copper having high heat transfer and workability is excellent. Copper tubes made of alloys are used. These copper tubes have good heat and workability, but are relatively expensive.

In the refrigeration and air conditioning system, the liquid pipe and the gas pipe made of copper pipes are to be installed according to the shape of the building and the installation conditions when the system is designed efficiently and the indoor unit and the outdoor unit are connected.

Specifically, when the refrigerant gas discharged to the discharge side of the compressor is distributed to the plurality of condensers, or when the refrigerant liquid is distributed from the condenser to the plurality of expansion valves, or when the refrigerant gas passing through the expansion valve is distributed to the plurality of evaporators, When a part of the refrigerant gas on the suction side of the compressor is supplied to the condenser to realize a supercooling degree and when the evaporator is bypassed in order to defrost the evaporator, In the case of the above, a branch tube is formed.

In this branch pipe, two refrigerant pipes branching from one refrigerant pipe are connected through a branch connection pipe forming two outlet-side flow paths from one inlet side. In this way, the branch connection pipe is formed from one inlet side to two outlet sides, and the branch pipe of the refrigerant can be formed by inserting the end portion of the copper pipe on each of the inlet side and the outlet side so as to maintain airtightness and watertightness.

Conventional branch connection pipes extend the space by swaging the inlet and outlet ends of the copper pipe, insert the copper pipe, and then join and fix the joint by brazing to connect and fix the refrigerant pipe and I have been using the same copper tube. Therefore, individual production costs of the branch connector were high.

In general, the method of joining members using fusion welding requires that both the members to be connected and the electrodes are made of the same material so that the effective joint strength can be maintained by the intermetallic affinity. However, the refrigerant tube and the branch connecting tube are not necessarily made of the same material, It is not a problem to maintain airtightness and watertightness at joints because it can show pressure strength.

Therefore, it will be apparent that it is desirable to search for a method of manufacturing a branch connection pipe that can reduce manufacturing costs by converting the branch connection pipe into a metal material other than the copper pipe.

In addition, the branch connector does not affect the efficiency of the system even though there is a difference in the heat transfer coefficient with the copper tube.

However, it is a reality that there is no possibility that the workability in the joint work can be selected from metal materials which are less costly than copper pipes.

Therefore, if a branch connector is proposed which has a structure which is convenient for workability of brazing operation while using a branch connector as a metal other than copper, and having a structure that is convenient for workability of brazing, it is possible to reduce the cost of manufacturing the branch connector. Of course, it may provide excellent workability that can be easily performed brazing operation for connecting to the refrigerant pipe.

Accordingly, the present invention is to provide a method for manufacturing a branch pipe of the refrigerant pipe that can reduce the manufacturing cost by manufacturing a refrigerant branch connection pipe made of a metal material of lower cost than the copper pipe of the copper alloy.

Another object of the present invention is to provide a structure for determining the position of the refrigerant pipe to be inserted to facilitate the brazing operation with the refrigerant pipe of the refrigerant pipe that can be easily connected to the refrigerant pipe It is to provide a method for manufacturing a branch connection pipe.

The present invention is a means for solving the above problems, the lower end is opened, the top tube 10 forming step of one end is divided into a plurality of flow paths (S100); Forming an upper end of the lower end tube 20 so that one end is branched into a plurality of flow paths so as to be correspondingly coupled to the upper end tube (S200); Coupling the upper end tube 10 to the upper portion of the lower end tube 20 (S300); Forming a plurality of connecting pipes 50 expanded or condensed toward one end (S400); (S500) fitting and fixing the connection pipe (50) to one end of the upper and lower pipes (10, 20) and the other end of the branch (50); Characterized in that consists of.

As described above, the present invention by forming a flow path portion, an extension portion, an extension portion, etc. in the upper and lower half of the semicircle consisting of a plurality of upper and lower, on the rim, there is an effect that can be easily brazed and joined to each other have.

In addition, the present invention is to be integrally joined, the stepped to be formed for each inner circumference of the flow path of the lower tube, the insertion range of the connector is determined, the effect that the inserted connector can be brazed without movement have.

In addition, the present invention forms a plurality of flow path by branching the flow path at one end, the refrigerant flowing in the refrigerant is distributed from the inlet pipe to the outlet pipe of the type forming a curved surface to significantly reduce the resistance generated as the refrigerant flows It can be effected.

In addition, the present invention has the effect of reducing the manufacturing cost as the metal material is cheaper than the copper alloy.

1 is a process flow diagram of an embodiment showing a branch connection pipe manufacturing method of the refrigerant pipe according to the present invention.
Figure 2 is a perspective view of one embodiment showing a branch connecting pipe made by FIG.
3 is a sectional view of Fig. 2;
Fig. 4 is an exploded perspective view of Fig. 2; Fig.
Figure 5 is a process diagram of one embodiment showing the brazing junction of the upper tube and the lower tube according to the present invention.
Figure 6 is a process diagram of one embodiment showing the brazing junction of another embodiment of the top tube and the bottom tube according to the present invention.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

To this end, according to an embodiment of the present invention,

Forming a top tube 10 having a lower opening and having one end branched into a plurality of flow paths (S100); Forming an upper end of the lower end tube 20 so that one end is branched into a plurality of flow paths so as to be correspondingly coupled to the upper end tube (S200); Coupling the upper end tube 10 to the upper portion of the lower end tube 20 (S300); Forming a plurality of connecting pipes 50 expanded or condensed toward one end (S400); (S500) fitting and fixing the connection pipe (50) to one end of the upper and lower pipes (10, 20) and the other end of the branch (50); Characterized in that consists of.

In addition, in the step S100, the upper tube 10 is the first channel portion 11 having a semi-circular cross-section, so as to correspond to the second channel portion 21 of the lower tube 20 to form a circular channel. ; First stepped portions (41) protruding from the inner circumference of both ends of the first flow path part (11); It is characterized by being provided with.

In addition, in the step S100, the upper tube 10 is the first channel portion 11 having a semi-circular cross-section, so as to correspond to the second channel portion 21 of the lower tube 20 to form a circular channel. ; A first edge portion 12 extending from the edge of the first flow path portion 11 and correspondingly contacting the second edge portion 22 formed on the edge of the bottom tube 20; First stepped portions (41) protruding from the inner circumference of both ends of the first flow path part (11); It is characterized by being provided with.

In addition, in the step S200, the lower tube 20 is a second flow path portion 21 having a semicircular cross section; A second border portion 22 that is bent to be horizontal with the ground at the edge of the second flow path portion 21; An extension part 23 extending in the longitudinal direction to the second edge part 22; A second stepped protrusion 42 protruding from the inner periphery of both ends of the second flow path part 21 so as to correspond to the first stepped protrusion 41 respectively protruding from the inner periphery of both ends of the upper tube 10; It is characterized by being provided.

In addition, in the step S300, after the upper end tube 10 and the lower end tube 20 is in contact with each other, the lower end tube 20, the extension 23 formed on the first edge portion 22 is the upper end tube ( After brazing or joining in the longitudinal direction to the outer periphery of 10) or the first and second edge portions 12 and 22 formed at the edges of the upper and lower pipes 10 and 20 to be in surface contact, the second The extension part 23 formed on the edge part 22 is bent toward the upper part of the first edge part 12, and then covered with brazing.

In addition, in the step S500, the connecting pipe 50 is fitted to the first and second stepped jaws 41, 42 formed on the inner peripheral edges of both ends of the upper and lower pipes 10, 20, and then, the first, It is characterized in that it is to be brazed at the contact portion with the second step (41, 42) or the contact portion with the flow path inner periphery.

Hereinafter, a method of manufacturing a branch connection pipe of a refrigerant pipe according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6.

As shown, the method of manufacturing a branch connection pipe of the refrigerant pipe according to the present invention is as follows.

1. The lower end is opened, one end is branched into a plurality of flow paths 10 forming step (S100): In the case of the branch connection pipe in the present invention, the upper and lower ends are made of brazing (Brazing) bonded to each other Will, in step S100 is the step of manufacturing the top tube 10 of the upper, lower tubes (10, 20).

The upper tube 10 is connected to the lower tube 20 and joined to form a tube to form a flow path therein, the linear inlet tube (A) portion of the refrigerant flows, and the inlet tube ( In the part A), the flow path is branched into a plurality, so that the outlet pipe body B from which the refrigerant is discharged may be formed.

The upper end pipe 10 for this purpose is open at both ends, the lower end also has a shape that is open, the inlet pipe (A) toward the outlet pipe (B) has a shape in which a plurality of passages branched from a single. The flow path of the upper tube 10 forms a first flow path part 11 having a semicircular cross-sectional shape such as '∩'. That is, the first flow path part 11 means the entire lengthwise flow path of the outlet pipe B from the inlet pipe A of the upper pipe 10.

In addition, the upper tube 10 may be formed only in the form of a first channel portion having a semi-circular shape as shown in FIG. 5 and the first embodiment, according to an embodiment of the user, or as shown in FIG. 6 as a second embodiment. As described above, for easy brazing operation with the lower tube 20 to be described later, the first edge portion 12 is further formed along the longitudinal direction on the lower outer periphery lower edge, that is, the edge of the first flow path portion 11. In this case, the first edge portion 12 may be manufactured to be extended in a form that is horizontal to the ground.

In addition, the inner circumferential edges of both end portions (parts into which refrigerant flows in) of the upper end pipe 10, that is, the inner circumferences of the inlet pipe A of the refrigerant and the outlet pipe B branched into a plurality, respectively, are respectively internal. The first step 41 is formed toward the first step 41, wherein the first step 41 has an inlet pipe A portion and a plurality of outlet pipe B portions having the remaining flow path portion of the first flow path part 11. By making the diameter larger in shape, it is possible to cause the jaw to occur due to the difference in diameter in the larger diameter portion.

2. Forming the lower end tube 20, the upper end is open, one end is branched into a plurality of flow paths (S200) so as to be correspondingly coupled to the upper end tube (10): the upper end tube 10 manufactured in step S100 described above Corresponding to the bottom of the) is the manufacturing step of the bottom tube 20 to be brazed.

Like the first flow path part 11 of the upper pipe 10, the lower pipe 20 has a plurality of flow paths toward the outlet pipe B through which the refrigerant is discharged from the inlet pipe A through which the refrigerant flows. It has the 2nd flow path part 21 which has the shape branched into.

The second channel part 21 is open at both ends and the upper part thereof, and is correspondingly joined to the upper tube 10 described above so that the first and second channel parts 11 and 21 form a circular flow path therebetween. In other words, it should have a semicircular cross-sectional shape of '∪' shape. That is, the second flow path part 21 means the entire lengthwise flow path of the outlet pipe B from the inlet pipe A of the lower pipe 20.

In addition, the bottom tube 20 has a second border portion 22 protruding horizontally with the ground on the upper edge to form the longitudinal direction of the bottom tube (20). When the first border portion 12 is formed in the upper tube 10 according to an embodiment, the second edge portion 22 corresponds to the first edge portion 12 and is in surface contact with the first edge portion 12. do.

In addition, the second edge portion 22 may be formed to further extend the outer portion 23, in the case of the extension portion 23, it may have two shapes, as shown in FIG. As described above, when the first edge portion 12 is not formed in the upper tube 10, the second edge portion 22 has a shape that is bent upward by 90 ° toward the upper portion, or in FIG. 6. As shown in the drawing, when the first edge portion 12 is formed in the upper tube 10, the first edge portion 12 is horizontally aligned with the ground toward the upper surface of the first edge portion 12 (or with the second edge portion 22). To be bent horizontally). 6, when the upper tube 10 corresponds to an upper portion of the lower tube 20 and is joined to the upper tube 10, the upper tube 10 is disposed on the upper surface of the second edge portion 22 of the lower tube 20. The first edge portion 12 of the first edge portion 12 is in contact with each other, and the extension portion 23 is formed so as to be positioned outside the first edge portion 12.

In addition, the lower end pipe 20, like the upper end pipe 10, also has an inner circumferential edge of the lower end (part where the refrigerant flows in and out), that is, the inlet side pipe A of the refrigerant and the outlet side pipe branched into a plurality ( A second step 42 is formed in each of the inner circumferential edges of B) toward the inside, and the second step 42 has an inlet tube A portion and a plurality of outlet tube B portions having a second flow path. By making the diameter relatively larger than the remaining flow path portion of the part 21, the jaw can be generated due to the difference in the diameter in the portion where the diameter is increased, and, of course, the inlet tube with the lower end of the larger diameter Obviously, the diameter of the portion (A) and the plurality of outlet side pipe bodies (B) is equal to the larger diameter of the inlet side body (A) portion of the upper tube 10 and the plurality of outlet side body bodies (B) described above. will be.

3. Step (S300) to correspond to the upper tube 10 to the upper portion of the lower tube 20 (S300): correspond to the phase, the lower tube (10, 20) respectively manufactured through the above-described step S100 and S200 Brazing step.

In other words, the upper tube 10 is brazed after the upper tube 10 corresponds to the upper portion of the lower tube 20 opened toward the upper side. In the case of this step S300, as shown in Figure 5 and 6, according to the shape of the upper, lower tubes (10, 20), two types of brazing step may be carried out.

The first embodiment, as shown in Figure 5, after the upper and lower pipes 10, 20 are positioned to correspond to each other, the extension portion formed in the second edge portion 22 of the lower pipe (20) ( 23) is brazed and bonded to the outer periphery of the upper end pipe 10 using a filler metal, so that the upper and lower end pipes 10 and 20 are joined together to be integrated.

In the second embodiment, as shown in FIG. 6, the first edge portion 12 corresponding to the second edge portion 22 of the bottom tube 20 is formed in the top tube 10. In the state in which the two edge portions 12 and 22 correspond to each other and face-to-face contact, the length of the extension portion 23 (the extension portion 23 of the lower end pipe 20) is vertically bent upward than the first embodiment of FIG. 5. Relatively longer (to extend to the edge of the upper tube 10) to be horizontally bent back toward the upper surface of the first edge portion 12 of the upper tube 10, the upper end After the upper surface of the first edge portion 12 of the tube 10 is formed to be covered, the contact portion of the upper surface of the first edge portion 12 of the upper tube 10 and the bottom of the extension portion 23, or an extension thereof. By brazing and joining the outer periphery of the end of the part 23 and the upper end pipe 10 using a material, the upper and lower end pipes 10 and 20 are made to be integrated. In other words, the second embodiment of the upper tube 10, the upper edge of the lower tube 20 (the first border portion 12) is the extension 23 of the lower tube 20 is upper, lower tube ( 10, 20) to have a form that wraps over the entire longitudinal direction.

4. Step (S400) to form a plurality of connecting pipes 50 extending or condensed toward one end: through the step S100 and S200 described above, after manufacturing the upper and lower pipes (10, 20), the brazing of step S300 The connection pipe 50 to be inserted and fastened respectively to the refrigerant inlet side and the branched refrigerant outlet side of the upper and lower pipes 10 and 20 (hereinafter, referred to as 'the main body 30') which are integrated with each other through the operation. Manufacturing step.

This, the connecting pipe 50 is one end is fitted to the end of the main body 30, the other end is to be a diameter enlarged form by swaging operation, such that the expansion portion is a branch of the refrigerant pipe of the present invention It can be manufactured in advance according to the diameter of the tube to be fitted to the connector, looking at the use of the connector 50, the body 30 is made of SUS (Steel Use Stainless) material, but in the field copper In the case where the pipe is used, it is used for the purpose of connecting the connecting pipe 50 made of the same material to each opening portion of the main body 30 made of SUS for ease of welding.

5. Steps of fitting and fixing the connecting pipe 50 to one end of the upper and lower pipes 10 and 20 and the other end branched (S500): A plurality of connecting pipes manufactured through the step S400 Brazing (50) to the inlet outlet (H) of the main body 30 to fix, the connecting pipe 50, according to the embodiment of the user, one end of the refrigerant inlet outlet of the main body 30 of the present invention (H), respectively, but only up to the stepped portion 40 formed by the first and second stepped portions 41 and 42 formed on the inner circumference of the refrigerant inlet side and the branched refrigerant outlet side of the upper and lower pipes 10 and 20, respectively. To make it fit, then let the brazing work take place.

That is, the upper and lower pipes 10, 20 are correspondingly coupled, such a plurality of connection pipes fitted to the main body 30 is formed with a single inlet outlet (H) at one end, a plurality of inlet outlets (H) at the other end 50, the inflow outlet (H) of the main body 30 in contact with the stepped portion 40 formed on the inner circumference to be brazed by using a brazing material, or the inflow pipe 50 is fitted By brazing at the inner circumferential portion of the outlet H, the plurality of connecting pipes 50 can be fixed to each inlet and outlet H of the main body 30.

In addition, in the present invention, for convenience of description, a single inlet outlet H that is not branched is referred to as the inlet tube A of the refrigerant, and the inlet outlet H where the flow path is divided into a plurality of outlet outlets of the refrigerant ( Although B), the inlet pipe (A) and the outlet pipe (B), according to the user's embodiment, after the refrigerant flows through a plurality of inlet outlets (H) branched, the refrigerant is added to a single inflow Of course, the direction of the refrigerant in the form discharged through the outlet (H) may be used to be reversed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: upper pipe 11: first flow path
12: first border portion 20: lower tube
21: second euro part 22: second border part
23: extension part 30: main body
40: step 41: first step
42: second step 50: connector
A: inlet pipe B: outlet pipe
H: inlet and outlet

Claims (6)

Forming a top tube 10 having a lower opening and having one end branched into a plurality of flow paths (S100);
Forming an upper end of the lower end tube 20 so that one end is branched into a plurality of flow paths so as to be correspondingly coupled to the upper end tube (S200);
Coupling the upper end tube 10 to the upper portion of the lower end tube 20 (S300);
Forming a plurality of connecting pipes 50 expanded or condensed toward one end (S400);
(S500) fitting and fixing the connection pipe (50) to one end of the upper and lower pipes (10, 20) and the other end of the branch (50);
Branch connection pipe manufacturing method of the refrigerant pipe, characterized in that consisting of.
The method of claim 1,
In step S100,
The upper tube 10 is
A first flow passage portion 11 having a semicircular cross section so as to correspond to the second flow passage portion 21 of the bottom tube 20 to form a circular flow passage;
First stepped portions (41) protruding from the inner circumference of both ends of the first flow path part (11);
Branch connection pipe manufacturing method of the refrigerant pipe characterized in that the manufacturing is provided.
The method of claim 1,
In step S100,
The upper tube 10 is
A first flow passage portion 11 having a semicircular cross section so as to correspond to the second flow passage portion 21 of the bottom tube 20 to form a circular flow passage;
A first edge portion 12 extending from the edge of the first flow path portion 11 and correspondingly contacting the second edge portion 22 formed on the edge of the bottom tube 20;
First stepped portions (41) protruding from the inner circumference of both ends of the first flow path part (11);
Branch connection pipe manufacturing method of the refrigerant pipe characterized in that the manufacturing is provided.
The method of claim 1,
In step S200,
The lower tube 20 is
A second flow passage portion 21 having a semicircular cross section;
A second border portion 22 that is bent at the edge of the second flow path portion 21 so as to be horizontal to the ground;
An extension part 23 extending in the longitudinal direction to the second edge part 22;
A second stepped protrusion 42 protruding from the inner periphery of both ends of the second flow path part 21 so as to correspond to a first stepped protrusion 41 respectively protruding from the inner periphery of both ends of the upper tube 10;
Branch connection pipe manufacturing method of the refrigerant pipe characterized in that the manufacturing is provided.
The method of claim 1,
The step S300,
After the upper end tube 10 and the lower end tube 20 are in contact with each other, the lower end tube 20 has an extension portion 23 formed on the first edge portion 22 on the outer circumference of the upper end tube 10. Brazing in the direction
Alternatively, the first and second edge portions 12 and 22 formed at the edges of the upper and lower pipes 10 and 20 are brought into surface contact with each other, and then the extension portion 23 formed on the second edge portion 22 is Method for producing a branch connection pipe of the refrigerant pipe, characterized in that the braided junction after the cover is bent toward the top of the first edge portion (12).
The method of claim 1,
In step S500,
The connector 50 is
After fitting to the first and second stepped jaws 41 and 42 formed on the inner circumferential edges of both ends of the upper and lower pipes 10 and 20, the contacting portion or the flow path of the first and second stepped jaws 41 and 42 are inserted. Method for producing a branch connection pipe of the refrigerant pipe, characterized in that for brazing bonding at the contact portion with the peripheral edge.

Images