KR102164804B1 - Heat Exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger.
The heat exchanger of the present invention comprises a plurality of refrigerant tubes through which refrigerant flows; A plurality of fins through which the plurality of refrigerant tubes pass and exchange heat transferred from the refrigerant flowing through the refrigerant tube with heat of air; And a connection band connecting the plurality of refrigerant tubes, wherein the connection band comprises: a plurality of straight pipe portions respectively connected to the plurality of refrigerant tubes; A bending pipe portion extending in a bent shape from each of the plurality of straight pipe portions and connected to each other; And a plurality of welding rings disposed on the outer circumference of each of the plurality of straight pipe parts and movably disposed along the straight pipe part.

Description

Heat Exchanger{Heat Exchanger}

The present invention relates to a heat exchanger for an air conditioner, and more particularly, to a heat exchanger including a connection band.

The heat exchanger of the air conditioner is a device that heats the refrigerant with outdoor air or indoor air. Heat that is released or absorbed through the phase change process of the refrigerant may be exchanged with air.

In the case of a heat exchanger used in an air conditioner, a plurality of refrigerant tubes through which a refrigerant flows, a plurality of fins forming a hole into which the refrigerant tube is inserted, and a plurality of fins that increase the contact area with air in a plate shape, and a plurality of refrigerant tubes It may include a connecting band to connect.

However, the interval in which the refrigerant tube protrudes from the outermost fin may be formed differently for each refrigerant tube. When the connection band and the refrigerant tube are connected, the welding position is formed differently, and thus, there is a problem that a portion to be unwelded during welding occurs, or a problem that a lot of time used for welding is required.
Korean Patent Publication No. 10-2006-0098910 discloses a connection band welded to a refrigerant tube.

The problem to be solved by the present invention is to provide a heat exchanger that improves weldability between a connection band and a refrigerant tube.

Another object of the present invention is to provide a heat exchanger that minimizes the time required for manufacturing.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the heat exchanger according to the present invention comprises: a plurality of refrigerant tubes through which refrigerant flows; A plurality of fins through which the plurality of refrigerant tubes pass and exchange heat transferred from the refrigerant flowing through the refrigerant tube with heat of air; And a connection band connecting the plurality of refrigerant tubes, wherein the connection band comprises: a plurality of straight pipe portions respectively connected to the plurality of refrigerant tubes; A bending pipe portion extending in a bent shape from each of the plurality of straight pipe portions and connected to each other; And a plurality of welding rings disposed on the outer circumference of each of the plurality of straight pipe parts and movably disposed along the straight pipe part, so that the connection band can be easily welded to the end of the refrigerant tube through the welding ring. Have.

Each of the plurality of straight pipe portions includes an insertion tube inserted into the refrigerant tube, and a welding ring guide tube having an outer diameter smaller than the outer diameter of the insertion tube and guiding the movement of the welding ring. The guide tube can be moved.

The welding ring guide pipe is disposed between the insertion pipe and the bending pipe portion, and the outer diameter of the welding ring guide pipe is formed smaller than the outer diameter of the insertion pipe, so that the welding ring can move only the welding ring guide pipe.

The inner diameter of the welding ring having an annular shape is smaller than the outer diameter of the insertion pipe and is formed larger than the outer diameter of the welding ring guide pipe, so that the welding ring can move only the welding ring guide pipe.

The bending pipe portion includes a plurality of curved pipes extending from each of the plurality of straight pipe portions, and a common pipe portion in which the plurality of curved pipes are joined at one point.

Each of the plurality of welding rings is welded at the ends of each of the plurality of refrigerant tubes when each of the plurality of straight pipe portions is inserted into each of the plurality of refrigerant tubes to facilitate a plurality of refrigerant tubes formed at various heights. Can be welded.

In the refrigerant tube, at an end connected to the connection band, a welding ring seating portion extending in a tube diameter is formed, so that the welding ring can be welded at the welding ring seating portion.

The connection band includes three straight pipe portions, and the bending pipe portion has a structure extending in a bent shape from each of the three straight pipe portions to be connected to each other, or includes two straight pipe portions, and the bending pipe portion It may have a structure that extends in a bent shape from each of the two straight pipe parts and is connected to each other.

Details of other embodiments are included in the detailed description and drawings.

According to the heat exchanger of the present invention, one or more of the following effects are provided.

First, there is an advantage of minimizing working time by easily connecting a plurality of refrigerant tubes protruding to the outside of the heat exchange fins arranged at the outermost sides with different lengths with a welding ring of the connection band.

Second, the welding ring disposed on the connection band is movable along the straight tube part, so that the welding ring can be moved and connected according to the length of the refrigerant tube, minimizing welding errors that may occur when connecting the refrigerant tube and the connection band. There are also advantages to be able to do.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention.
2 is a view for explaining the configuration of a heat exchanger according to an embodiment of the present invention.
3A is a perspective view of a connection band according to an embodiment of the present invention.
3B is a side view of FIG. 3A.
4 is a plan view of a welding ring according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a state in which the connection band of FIG. 3A is connected to a plurality of refrigerant tubes.
6A is a perspective view of a connection band according to another embodiment of the present invention.
6B is a side view of FIG. 6A.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the art to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a heat exchanger according to embodiments of the present invention.

<Overall composition>

1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention. Hereinafter, a configuration of an air conditioner according to the present embodiment will be described with reference to FIG. 1.

The air conditioner according to the present embodiment includes a compressor 10 for compressing a refrigerant, a first heat exchanger 12 for heat exchange between the refrigerant and indoor air, a second heat exchanger 14 for heat exchange between the refrigerant and outdoor air, and a compressor 10. ), a switching valve 22 that selectively sends the refrigerant compressed by the first heat exchanger 12 or the second heat exchanger 14, and a first expansion valve that expands the refrigerant flowing into the first heat exchanger 12 (16), and a second expansion valve (18) for expanding the refrigerant introduced into the second heat exchanger (14).

The air conditioner according to the present embodiment may further include an accumulator 20 for separating the gas phase refrigerant and the liquid refrigerant from the refrigerant introduced into the compressor 10. The accumulator 20 supplies the separated gas phase refrigerant to the compressor 10.

<Configuration of heat exchanger>

2 is a view for explaining the configuration of a heat exchanger according to an embodiment of the present invention. Hereinafter, a heat exchanger according to the present embodiment and a configuration thereof will be described with reference to FIG. 2.

In the first heat exchanger 12 or the second heat exchanger 14 according to the present embodiment, a plurality of refrigerant tubes 32 and a plurality of refrigerant tubes 32 through which a refrigerant flows, and through the refrigerant tube 32. It includes a plurality of fins 30 for exchanging heat transferred from the flowing refrigerant with heat of air, and connection bands 40a and 40b connecting the plurality of refrigerant tubes 32.

Each of the plurality of pins 30 has a thin plate shape and is spaced apart from each other at regular intervals. Each of the plurality of fins 30 has a through hole 34 through which the plurality of refrigerant tubes 32 pass. The plurality of fins 30 may receive heat from the refrigerant through the refrigerant tube 32 inserted into the through hole 34. The plurality of fins 30 exchange heat between the air flowing around the plurality of fins 30 and the refrigerant flowing through the refrigerant tube 32.

The plurality of refrigerant tubes 32 are inserted into the through holes 34 formed in the plurality of fins 30. The plurality of refrigerant tubes 32 may be disposed parallel to each other. The plurality of refrigerant tubes 32 may be connected to the connection bands 40a and 40b at their ends. Each end portion of the plurality of refrigerant tubes 32 may be spaced apart from the fins 30 disposed at the outermost sides of each other.

A welding ring seating portion 32a on which the welding ring 60 is seated is formed at an end of the refrigerant tube 32 connected to the connection bands 40a and 40b. The welding ring seating part 32a may be welded with the welding ring 60 to which the welding ring 60 is seated. The welding ring seating part 32a may have a structure in which the tube diameter increases toward the end so as to stably contact the welding ring 60.

<Connection Band>

3A is a perspective view of a connection band according to an embodiment of the present invention. 3B is a side view of FIG. 3A. 4 is a plan view of a welding ring according to an exemplary embodiment of the present invention. 5 is a diagram illustrating a state in which the connection band of FIG. 3A is connected to a plurality of refrigerant tubes. 6A is a perspective view of a connection band according to another embodiment of the present invention. 6B is a side view of FIG. 6A.

Hereinafter, a configuration of a connection band according to the present embodiment and a connection relationship between a refrigerant tube will be described with reference to FIGS. 3A to 6B.

The connection bands 40a and 40b according to this embodiment are connected to at least two refrigerant tubes 32. The refrigerant tube 32 and the connection band 40 according to the present embodiment may be connected to each other through welding.

The connection bands 40a and 40b according to this embodiment connect the two refrigerant tubes 32 and send the refrigerant introduced from one refrigerant tube 32 to the other refrigerant tube 32. ) Can be included. The connection bands 40a and 40b according to the present embodiment connect three refrigerant tubes 32 to branch and send the refrigerant introduced into one refrigerant tube 32 to the remaining two refrigerant tubes 32 It includes a tube 40a.

The connection bands 40a and 40b are connected to the refrigerant tube 32 and extend in a bent form at the ends of each of the plurality of straight pipe parts 46 and the plurality of straight pipe parts 46 formed in a straight shape. , A bending pipe part 42 connected to each other, and a welding ring 60 disposed on the outer circumference of each of the plurality of straight pipe parts 46, and disposed to be movable along the straight pipe part 46. The connection bands 40a and 40b according to the present embodiment may have two to three straight pipe parts 46.

The straight pipe part 46 has an outer diameter smaller than the outer diameter of the insertion pipe 50 and the insertion pipe 50 inserted into the refrigerant tube 32, and a welding ring disposed between the insertion pipe 50 and the bending pipe part 42 It includes a guide tube (48).

The insertion tube 50 according to this embodiment may be inserted into the refrigerant tube 32. Therefore, the outer diameter (D2) of the insertion tube (50) is formed smaller than the inner diameter of the refrigerant tube (32). The outer diameter (D2) of the insertion pipe 50 according to the present embodiment is formed larger than the outer diameter (D1) of the welding ring guide pipe (48). At a portion where the insertion tube 50 and the welding ring guide tube 48 are connected, a jaw may occur according to a difference in outer diameter. Therefore, the insertion pipe 50 limits the movement of the welding ring 60 in one direction along the circumference of the welding ring guide pipe 48.

The welding ring guide pipe 48 according to the present embodiment extends in a straight line from the insertion pipe 50 in the direction of the bending pipe part 42. The welding ring guide pipe 48 has an outer diameter of a size that the welding ring 60 can move. The outer diameter (D1) of the welding ring guide pipe (48) is formed to be smaller than the inner diameter (D3) of the welding ring (60). The outer diameter (D1) of the welding ring guide pipe (48) is formed smaller than the outer diameter (D2) of the insertion pipe (50).

The welding ring 60 has a ring shape and is disposed on the outer circumference of the welding ring guide pipe 48. The welding ring 60 according to the present embodiment may have a circular cross section. The welding ring 60 according to this embodiment may move along the outer circumference of the welding ring guide pipe 48. The welding ring 60 according to this embodiment may be welded to the end of the coolant tube 32 when the insertion tube 50 is inserted into the coolant tube 32.

When the insertion pipe 50 is inserted into the refrigerant tube 32, the welding ring 60 may move to the end of the refrigerant tube 32 along the welding ring guide pipe 48. The welding ring 60 moves along the welding ring guide pipe 48, and the movement may be limited by the insertion pipe 50 on one side, and the movement may be limited by the bending pipe part 42 on the other side. have.

The bending pipe portion 42 according to the present embodiment extends from the plurality of straight pipe portions 46 to form a curved pipe, and are connected to each other at one point. The bending pipe portion 42 according to the present embodiment extends in a direction opposite to the insertion pipe 50 at the end of the welding ring guide pipe 48 of each straight pipe portion 46.

The bandin pipe part 42 may be formed at a portion extending from the straight pipe part 46, and an expansion part 42a in which the pipe diameter of the outer circumference is expanded may be formed. The expansion part (42a) is formed with the outer diameter of the curved pipe (43) larger than the outer diameter (D1) of the welding ring guide pipe (48), preventing the welding ring (60) from moving outside the welding ring guide pipe (48) can do.

The bending pipe part 42 according to the present embodiment includes a plurality of curved pipes 43 extending from a plurality of straight pipe parts 46 and a common pipe part 44 in which the plurality of curved pipes 43 are joined at one point. Include.

The connection bands 40a and 40b according to the present embodiment may be a tri-port pipe 40a to which the three straight pipe portions 46 are connected, or a return band 40b to which the two straight pipe portions 46 are connected.

That is, referring to FIGS. 3A to 3B, in the triport pipe 40a, the curved pipes of the three bending pipe portions 42 extending from each of the three straight pipe portions 46 may be combined in the common pipe portion 44. . Further, referring to FIGS. 6A to 6B, in the return band 40b, the curved pipes of the two bandin pipe portions 42 extending from each of the two straight pipe portions 46 may be combined in the common pipe portion 44.

The connection bands 40a and 40b according to this embodiment may be combined with two or more refrigerant tubes 32. However, the interval at which the end of the refrigerant tube 32 is spaced apart from the outermost fin may be formed differently. The degree of insertion of each of the plurality of straight pipe portions 46 of the connection bands 40a and 40b into the refrigerant tube 32 may be different. When the connection bands 40a and 40b are connected to the plurality of refrigerant tubes 32, the welding rings 60 move, respectively, so that they can be welded at the ends of the refrigerant tubes 32.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and without departing from the gist of the present invention claimed in the claims, Various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

10: compressor 12: first heat exchanger
14: third heat exchanger 30: heat exchange fin
32: refrigerant tube 34: through hole
40a, 40b: connection band 42: bending pipe part
43: curved pipe 44: common pipe part
46: straight pipe part 48: welding ring guide pipe
50: insertion pipe 60: welding ring

Claims (9)

A plurality of refrigerant tubes through which refrigerant flows;
A plurality of fins through which the plurality of refrigerant tubes pass and exchange heat transferred from the refrigerant flowing through the refrigerant tube with heat of air; And
It includes a connection band connecting the plurality of refrigerant tubes,
The connection band,
A plurality of straight pipe portions respectively connected to the plurality of refrigerant tubes;
A bending pipe portion extending in a bent shape from each of the plurality of straight pipe portions and connected to each other; And
And a plurality of welding rings disposed on the outer circumference of each of the plurality of straight pipe parts and movably disposed along the straight pipe part,
Each of the plurality of straight pipe parts,
An insertion tube inserted into the refrigerant tube,
It has an outer diameter smaller than the outer diameter of the insertion tube, and includes a welding ring guide pipe for guiding the movement of the welding ring,
The welding ring guide pipe is disposed between the insertion pipe and the bending pipe portion, and the outer diameter of the welding ring guide pipe is formed smaller than the outer diameter of the insertion pipe,
The inner diameter of the welding ring having an annular shape is smaller than the outer diameter of the insertion pipe, and is formed larger than the outer diameter of the welding ring guide pipe,
Each of the plurality of welding rings,
When each of the plurality of straight pipe portions is inserted into each of the plurality of refrigerant tubes, the heat exchanger is welded at the ends of each of the plurality of refrigerant tubes. delete delete delete The method of claim 1,
The bending pipe part,
A heat exchanger comprising a plurality of curved pipes extending from each of the plurality of straight pipe parts, and a common pipe part in which the plurality of curved pipes are joined at one point. delete The method of claim 1,
The refrigerant tube is a heat exchanger having a welding ring seating portion extending in a tube diameter at an end connected to the connection band. The method of claim 1,
The connection band includes three straight pipe parts,
The bending pipe portion is a heat exchanger extending in a bending shape from each of the three straight pipe portions and connected to each other. The method of claim 1,
The connection band includes two straight pipe parts,
The bending pipe portion is a heat exchanger extending from each of the two straight pipe portions in a bent shape and connected to each other.

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