KR101400866B1 - Distributing pipe of refrigerant pipe - Google Patents

Abstract

The present invention relates to a branch connector of a refrigerant pipe.
The present invention is characterized in that the two outlet-side tubes connected to the curved surface from the inlet-side tube having a semicircular cross-section are formed as a pair of divided branch connecting tubes symmetrically formed, and the inlet-side tube and the outlet- The inner peripheral surface is provided with a stopper for contacting the end portion of the refrigerant pipe to be inserted, and a coupling means for coupling the two ends of the semicircular shape which are mutually facing surfaces, so that the brazing operation with the refrigerant pipe can be easily performed A structure capable of determining the position of the refrigerant pipe to be inserted is provided, so that the connection operation can be easily performed.

Description

[0002] Distributing pipe of refrigerant pipe [0003]

The present invention relates to a branch connection pipe for connecting a refrigerant branch pipe applied to a refrigeration system or an air conditioning system, and more particularly to a branch pipe for a refrigerant branch connection pipe which is made of a metal material other than a copper pipe, The present invention relates to a branch connecting pipe of a refrigerant pipe capable of easily performing a connecting operation by providing a structure capable of determining a position of a refrigerant pipe to be inserted so as to easily perform soldering work with a refrigerant pipe.

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 tube is accompanied by processing steps such as cutting, bending, swaging, flaring, etc. for piping and jointing, the copper alloy of the bronze material having high heat conductivity and excellent workability Is 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.

Fig. 1 shows an example of a branch connecting pipe for forming a refrigerant tube in the related art.

Referring to this figure, a conventional branch connecting pipe is formed by swaging the inlet side and outlet side end portions of a copper pipe to expand the space, inserting a copper pipe, and then connecting and fixing by jointing by brazing, The same copper tube as the refrigerant tube has been used. 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 is obvious that it is desirable to find a way to reduce the manufacturing cost by converting the branch connector into a metal material other than copper pipes.

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 having a metal structure other than a copper tube and having a structure that is less expensive than a bronze material and has a convenient structure for brazing work is proposed, it is possible to reduce the manufacturing cost of the branch connector As a matter of course, the brazing operation for connecting with the refrigerant pipe can provide an excellent workability that can be easily performed.

Accordingly, it is an object of the present invention to provide a refrigerant branch connector capable of reducing manufacturing cost by manufacturing a refrigerant branch connecting pipe made of a metal material having a lower cost than a copper alloy copper alloy pipe.

It is another object of the present invention to provide a structure for determining a position of a refrigerant pipe inserted so as to facilitate brazing work with a refrigerant pipe, To provide a branch connector.

Technical features of the present invention to accomplish the objects of the present invention are as follows. A refrigerant branch connection pipe branched from one inlet pipe to at least two outlet pipes is made of a metal material less expensive than a copper alloy, Side inlet pipe and the outlet pipe are symmetrically formed, and the inlet-side pipe and the outlet-side pipe of the divided branch pipe are inserted into the inner peripheral surface of the outlet-side pipe, And a coupling means for coupling both end portions of the semicircular shape which are opposed to each other with stoppers formed in contact with the ends of the refrigerant pipe.

Another technical feature of the present invention is to provide a refrigerant branch connection pipe branched from at least one inlet pipe to at least two outlet pipes, which is made of a metal material less expensive than a copper alloy, The inlet pipe and the outlet pipe of the split branch pipe are expanded so that the end of the refrigerant pipe to be inserted is extended And a coupling means for coupling both end portions of the semicircular shape, which are mutually opposed faces, with the stopper formed in contact therewith.

The coupling means includes a horizontal portion formed outwardly from both ends of one of the divided branched branch pipes and a vertical portion formed upwardly from the horizontal portion to receive the end portion of another branched branched pipe. So that the jointed portion of the divided branch connector can be welded.

Wherein the coupling means comprises a first horizontal portion outwardly from both ends of any one of the divided branch connection tubes, a vertical portion formed upwardly from the first horizontal portion, And a horizontal portion inserted into the receiving portion formed by the first horizontal portion and the second horizontal portion is formed at both ends of the other divided branched coupling pipe, So that the welded joints of the divided branch connecting tubes can be welded.

According to the present invention, it is easy to manufacture by joining the end portions of the divided branch connecting tubes by using the accommodating portion and welding the butted portions, and the insertion range of the refrigerant tube inserted by the stopper in the inlet side tube and the outlet side tube is determined And the inserted refrigerant tube provides a convenient operation in which the welding operation can be performed without moving.

In addition, the refrigerant is distributed from the inlet-side tube to the outlet-side tube that forms a curved surface, and the resistance generated when the refrigerant flows can be remarkably reduced.

In addition, since the metal material is less expensive than the copper alloy, production costs are reduced.

1 is a perspective view of a conventional refrigerant distributing pipe
2 (a) is an exploded perspective view of a refrigerant branch connecting pipe according to the present invention;
(B) is a perspective view of the refrigerant branch connecting pipe according to the present invention
3 is an exploded perspective view showing the interior of the first embodiment of the present invention.
4 is a perspective view of a first embodiment of the present invention.
5 is a plan view of the first embodiment of the present invention.
6 is a cross-sectional view taken along line AA in Fig. 5
7 is a cross-sectional view of a state in which the refrigerant tube is coupled in the first embodiment of the present invention
8 is a sectional view taken along the line BB in Fig. 6
9 is a cross-sectional view taken along the line CC in Fig. 6
10 is an enlarged view of part D in Fig. 7
Fig. 11 is an enlarged view of part E in Fig. 8
12 is an enlarged view of part F in Fig. 9
13 is an exploded perspective view showing the inside of the second embodiment of the present invention.
14 is a perspective view of a second embodiment of the present invention
15 is a plan view of a second embodiment of the present invention
16 is a sectional view taken along line G'-G 'in Fig. 15
17 is a cross-sectional view taken along line HH in Fig. 16
Fig. 18 is a cross-sectional view taken along line II of Fig.
19 is an enlarged view of a portion J in Fig. 17
20 is an enlarged view of the portion K in Fig. 18
21 is a plan view of the third embodiment of the present invention

The features and advantages of the present invention will be more clearly understood from the accompanying drawings.

Hereinafter, embodiments of the present invention will be described.

Figs. 3 to 12 show drawings related to the first embodiment of the present invention. Fig.

Referring to these drawings, the branch connection pipe 1 of the present invention is composed of a lower branch connection pipe 10 and an upper branch connection pipe 20.

The lower branch connecting pipe 10 is formed in a semicircular cross section in which two outlet pipes 101 and 102 are connected to each other through a curved tube 103 from one inlet pipe 100, And stoppers 104, 105, and 106 for facilitating the operation of the upper branch connecting pipe 20. On the outer circumferential surface, accommodating portions 107 and 108 are formed at both ends of the semicircular cross section to join the upper branch connecting pipe 20.

The stoppers 104, 105, and 106 are integrally formed in a semicircular shape at positions where refrigerant tubes are appropriately inserted from the ends of the inlet side tube 100 and the outlet side tubes 101 and 102, respectively.

The receiving portions 107, 108, and 109 include horizontal portions 110, 111, and 112 and vertical portions 120, 121, and 122, respectively.

The horizontal parts 110, 111 and 112 protrude horizontally outward from both ends of the semicircular section, and the vertical parts 120 and 121 protrude upward from the ends of the horizontal parts 110 and 111, respectively .

The distance between the vertical parts 120, 121 and 122 of the upper part 120 is equal to the outer diameter of the upper branch connection pipe 20 and the distance between the horizontal parts 110, 111 and 112 and the vertical parts 120, So that the upper branch connecting tube 20 can be placed.

The horizontal portions 110, 111 and 112 and the vertical portions 120, 121 and 122 are continuously formed on the outer curved surfaces of the inlet side tube 100, the curved tube 103 and the outlet side tubes 101 and 102 And the horizontal portion 112 is formed continuously along the curved surface between the two outlet-side tubes 101, 102.

The upper branch connection pipe 20 is formed in a semicircular cross section in which two outlet side tubes 201 and 202 are connected to the curved tube 203 from one inlet side tube 200, The inlet side tube 200 and the outlet side tubes 201 and 202 are formed on the inner circumferential surface so as to be symmetrical with the shapes except for the horizontal portions 110, 111 and 112 and the vertical portions 120, 121 and 122, The stoppers 204, 205 and 206 are formed at the positions where the refrigerant pipe is appropriately inserted from the ends of the lower branch connecting pipe 10 and the accommodating portions 107, 108 and 109 where both ends of the semicircular cross- . ≪ / RTI >

The lower branch connecting pipe 10 and the upper branch connecting pipe 20 can be manufactured by a processing method such as casting, forging, press molding, etc., and the material thereof is less expensive than the copper alloy. Preferably, the lower branch connecting pipe 10 and the upper branch connecting pipe 20 are made of soft steel , mild steel) can be selected.

When the upper branch connecting pipe 20 is placed on the receiving portions 107, 108 and 109 of the lower branch connecting pipe 10, the horizontal portions 110 and 111 of the lower branch connecting pipe 10 The upper surface of the upper branch connecting pipe 20 and the lower surface of the upper branch connecting pipe 20 are in contact with each other and the vertical portions 120, do.

At this time, the semicircular inlet-side tubes 101 and 200 and the outlet-side tubes 101 and 201 (102 and 202) are cylindrical tubes, and the stoppers 104 and 105 And the semicircular stoppers 204, 205, and 206 formed on the upper branch connecting pipe 20 and the upper branch connecting pipe 20 face each other to form a ring-shaped body.

The horizontal portions 110, 111 and 112 and the vertical portions 102, 121 and 122 and the upper branch connecting pipe 20 are connected to each other such that the lower branch connecting pipe 10 and the upper branch connecting pipe 20 can be hermetically coupled. (20) by brazing.

The branch connection pipe 1 can be brazed in a state in which the upper branch connection pipe 20 is maintained in an accurate position by the vertical parts 120, 121 and 122 formed in the lower branch connection pipe 10 As shown in FIG. 7, when the refrigerant pipes P and P 'connected to both ends are inserted, the stoppers 104 and 204 (105 and 205) ( The ends of the refrigerant pipes P and P 'can be connected to the stoppers 104 and 204 (105 and 205) (106 and 206) So that excellent airtightness and watertightness can be exerted with a stronger bonding force.

13 to 20 show drawings related to the second embodiment of the present invention.

Also in this embodiment, the branch connection pipe 1a is composed of a lower branch connection pipe 10a and an upper branch connection pipe 20a.

The lower branch connection pipe 10a is connected to the curved pipe body 103a through the two outlet pipes 101a and 102a from one inlet pipe 100a like the lower branch pipe 10 of the first embodiment described above The stopper 104a, 105a, 106a for easily connecting the refrigerant pipe is formed on the inner circumferential surface, and on the outer circumferential surface thereof, the stopper 104a, 105a, Receiving portions 107a and 108a are formed at the end portions.

The stoppers 104a, 105a, and 106a are integrally formed in a semicircular shape at positions where refrigerant tubes are appropriately inserted from the ends of the inlet-side tube 100a and the outlet-side tubes 101a and 102a, respectively.

The receiving portions 107a, 108a and 109a include first horizontal portions 110a, 111a and 112a, vertical portions 120a, 121a and 122a and second horizontal portions 130, 131 and 131.

The first horizontal portions 110a, 111a and 112a are vertically protruded outward from both ends of the semicircular section, and the vertical portions 120a, 121a, And the second horizontal portions 130, 131 and 132 are protruded from the end portions of the vertical portions 120a, 121a and 122a so as to face the first horizontal portions 110a, 111a and 112a.

The horizontal portions 110a, 111a and 112a and the vertical portions 120a, 121a and 122a and the second vertical pipes 120a, 121a, and 122a are spaced apart from each other by a distance corresponding to the outer diameter of the upper branch connection pipe 20. [ The upper branch connecting pipe 20 can be placed in the space formed by the horizontal portions 130, 131, and 132.

The first horizontal portions 110a, 111a and 112 and the vertical portions 120a and 121a and 122a and the second horizontal portions 130 and 131 and 131 have the same shape as that of the inlet side tube 100a The curved tube body 103a and the outer curved surfaces of the outlet side tubes 101a and 102a and the horizontal portion 112a is continuously formed along the curved surface between the two outlet side tubes 101a and 102a.

The upper branch connecting pipe 20a is connected to the curved tubular body 203a through two outlet side tubes 201a and 202a from one inlet side tube 200a like the lower branch connecting tube 10 of the first embodiment described above The stoppers 204a, 205a, and 206a are formed at the positions where the refrigerant pipe is properly inserted, and the stoppers 204a, 205a, and 206a are protruded outward from both ends, The horizontal portions 210, 211, and 212 are inserted into the spaces formed by the second horizontal portions 130, 131, and 131, respectively.

The embodiment having such a structure is formed by the horizontal portions 110a, 111a and 112, the vertical portions 120a, 121a and 122a and the second horizontal portions 130, 131 and 131 in the lower branch connection pipe 10a The horizontal portions 130, 131 and 132 of the upper branch connecting pipe 20a are inserted into the space and then the ends of the second horizontal portions 130, 131 and 132 and the upper branch connecting pipe 20a are brazed .

The vertical portions 120a, 121a and 122a are long enough to contact the horizontal portions 210, 211 and 212 of the upper branch connection pipe 20a, The second horizontal portions 130,131 and 131 are formed while being bent from the first horizontal connecting portions 120a and 121a and the horizontal portions 210 of the upper branched connecting pipe 20a which are seated on the first horizontal portions 110a, , 211 and 212 may be fixed.

The lower branch connecting pipes 10 and 10a and the upper branch connecting pipes 20 and 20a can be manufactured by a processing method such as casting, forging, extrusion molding, blanking, etc., Preferably, mild steel may be selected.

The first embodiment and the second embodiment described above describe a preferred embodiment of the present invention. Accordingly, the scope of the technical rights of the present invention is not limited to the embodiments described above and the attached drawings, and the scope of the present invention may be extended to parts that can be easily changed from the technical idea of the present invention. Of course.

Fig. 21 shows an example in which the present invention can be modified.

Referring to this figure, the refrigerant pipe is inserted and expanded from the first and second embodiments described above by the extension parts 310, 311, and 312 into which the copper pipe is inserted by expanding the inlet side and the outlet side end, The stoppers 320, 321, and 322 are formed.

In addition, the inlet pipe and the outlet pipe of the split branch pipe are expanded so that the expansion parts 310, 311, and 312, which are in contact with the ends of the refrigerant pipe to be inserted, are made of a copper alloy, S1, S2, and S3 provided with the SW1, SW2, and SW3 are integrally welded, so that it is possible to more conveniently perform the operation of welding with the coolant pipe in the field.

In this embodiment, the stoppers 320, 321, and 322 formed by the extensions 10, 311, and 312 replace the protruding stoppers of the first and second embodiments described above, The vertical portion and the vertical portion in the first embodiment, the first horizontal portion, the vertical portion, and the second horizontal portion in the second embodiment.

10, 10a: lower branch connector
20, 20a: Upper branch connector
100, 100a, 200, 200a: inlet-side tube
101, 101a, 102, 102a, 201, 201a, 202, 202a:
103, 102a, 203, 203a: Curved tube
104, 104a, 105, 105a, 106, 106a: stopper
107, 107a, 108, and 108a:
110, 110a, 111, 111a, 112, 112a:
120, 120a, 121, 121a, 122, 122a:
130, 131, 131:
204, 204a, 205, 205a, 206, 206a:
310, 311, 312:
320, 321, 322: Stopper
S1, S2, S3: Socket
SW1, SW2, SW3: Swaging processing part

Claims (8)

Claims 1. A refrigerant branch connection pipe which branches from one inlet pipe to at least two outlet pipes, comprising: a pair of divided branches, each of which is symmetrical with respect to the two outlet-side tubes connected to the curved surface from the inlet- The inlet pipe and the outlet pipe of the split branch pipe are extended to form a stopper in contact with the end of the refrigerant pipe to be inserted, and both ends of the semicircular shape Coupling means for coupling,
The coupling means includes a horizontal portion formed outwardly from both ends of one of the divided branched branch pipes and a receiving portion formed in a vertical portion from the horizontal portion to receive the end portion of another branched branched pipe So that the joined branch portions can be welded,
The split branch connector is formed of a metal material which is cheaper than the copper alloy,
A stopper is formed by an extension formed by expanding an inlet side and an outlet side end to which the refrigerant tube is inserted and coupled,
And a socket having a swaging part is integrally welded to the expansion part.
Claims 1. A refrigerant branch connection pipe which branches from one inlet pipe to at least two outlet pipes, comprising: a pair of divided branches, each of which is symmetrical with respect to the two outlet-side tubes connected to the curved surface from the inlet- The inlet pipe and the outlet pipe of the split branch pipe are extended to form a stopper in contact with the end of the refrigerant pipe to be inserted, and both ends of the semicircular shape Coupling means for coupling,
Wherein the coupling means comprises a first horizontal portion extending outwardly from both ends of one of the divided branch connection tubes, a vertical portion formed upwardly from the first horizontal portion, and a second horizontal portion extending inward from the vertical portion, And a horizontal portion inserted into the accommodating portion formed by the first horizontal portion and the second horizontal portion is formed at both ends of the other divided branch connection tube So that the joined branch pipe can be welded,
The split branch connector is formed of a metal material which is cheaper than the copper alloy,
A stopper is formed by an extension formed by expanding an inlet side and an outlet side end to which the refrigerant tube is inserted and coupled,
The second horizontal part is bent from the vertical part of the upper branch connection pipe to fix the horizontal part of the upper branch connection pipe seated in the first horizontal part,
And a socket having a swaging part is integrally welded to the expansion part.
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