KR101336372B1 - Refrigerant system - Google Patents

Abstract

This embodiment proposes a refrigerant system.

Refrigerant system according to the embodiment, a plurality of refrigerant passages are respectively formed therein, a plurality of flat tubes each having a plurality of straight portions and at least one curved portion, at least one other tube disposed between the two straight portions; A header having a plurality of first chambers connected to the refrigerant inlet of the flat tube and a plurality of second chambers connected to the refrigerant outlet; A distributor connected to the first chamber to guide the flow of the refrigerant; A connection tube interposed between the distributor and the first chamber, the connecting tube connecting the distributor and the first chamber; A capillary having a main part connected to the second chamber to guide the flow of the refrigerant, and a plurality of branch parts branched from the main part to connect the second chamber and the main part, respectively; .

Refrigerant

Description

Refrigerant system

This embodiment relates to a refrigerant system.

Refrigerant systems are generally divided into compressor-condenser-expander-evaporator. The condenser or evaporator is also commonly referred to as a heat exchanger because the internal refrigerant causes heat exchange with the external fluid.

The heat exchanger may be broadly classified into a fin-tube type heat exchanger and a micro channel tube type heat exchanger. The fin-tube type heat exchanger includes a plurality of fins and a plurality of circular or circular shaped tubes passing through the plurality of fins. On the other hand, the micro channel tube type heat exchanger includes a plurality of flat tubes and fins which are bent a plurality of times when provided between the flat tubes.

An object of the present embodiment is to propose a refrigerant system in which a heat exchanger can be easily manufactured.

Another object of this embodiment is to propose a refrigerant system to improve the efficiency of the heat exchanger.

According to one aspect of the present invention, a refrigerant system includes: a plurality of flat tubes each having a plurality of refrigerant passages formed therein, each having a plurality of straight portions and one or more curved portions, and one or more other tubes disposed between the two straight portions; A header having a plurality of first chambers connected to the refrigerant inlet of the flat tube and a plurality of second chambers connected to the refrigerant outlet; A distributor connected to the first chamber to guide the flow of the refrigerant; A connection tube interposed between the distributor and the first chamber, the connecting tube connecting the distributor and the first chamber; A capillary having a main part connected to the second chamber to guide the flow of the refrigerant, and a plurality of branch parts branched from the main part to connect the second chamber and the main part, respectively; .

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According to the proposed embodiment, by simultaneously heating between the components constituting the heat exchanger and the heat exchanger and the connection tube and the connection tube and the first distributor, each can be fixed at the same time, it is possible to easily manufacture a refrigerant system There is an advantage.

Further, a straight flat tube having a predetermined length is bent at a predetermined curvature so that both ends thereof are parallel to each other, and the both ends thereof are coupled to the header, so that the production of the flat tube is simplified, and the header and the flat tube are The advantage is that the coupling is simple.

In addition, since the plurality of flat tubes are passed through the plurality of fins, when the heat exchanger functions as an evaporator, the condensed water generated in the heat exchange process can easily flow downward.

Hereinafter, embodiments will be described in detail with reference to the drawings.

1 is a view showing the structure of a refrigerant system according to an embodiment, FIG. 2 is an enlarged view of part X of FIG. 1, and FIG. 3 is a partial vertical cross-sectional view of the heat exchanger according to the embodiment.

1 to 3, the refrigerant system 1 according to the present embodiment, the heat exchange is provided with a plurality of flat micro-channel tube 11 (hereinafter referred to as 'flat tube' for convenience of description) Connected to the air conditioner 10, the first distributor 40 communicating with the heat exchanger 10, the capillary 60 communicating with the heat exchanger 10, and the capillary 60. A second distributor 70 is included.

In detail, the heat exchanger 10 includes a plurality of fins 12 through which the plurality of flat tubes 11 pass, and a header 20 coupled to both ends of the plurality of flat tubes 11.

The plurality of flat tubes 11 are spaced apart from each other, and each of the headers 20 has a coupling hole for coupling the plurality of flat tubes 11 to a shape corresponding to the flat tube 11. .

For example, the flat tube 11 and the fin 12 may be formed of an aluminum material having excellent conductivity.

Each of the flat tubes 11 includes a tube body 111 and a partition portion 113 that divides the inner space of the tube body 111 into a plurality of refrigerant passages 112.

2, the first flat tube 120, the second flat tube 130, and the third flat tube 140 are illustrated as an example. Externally, each of the flat tubes 120, 130, and 140 includes one curved portion 123, 133, and 143 and two straight portions 121, 131, 141, 122, 132, and 142 connected thereto. Included. The curved portions 123, 133, and 143 are bent at a predetermined curvature so that the two straight portions 121, 131, and 141 (122, 132, and 142) can be parallel to each other. That is, each of the flat tubes 120, 130, and 140 may be formed by bending one tube having a predetermined length to have a predetermined curvature.

Here, each of the flat tubes 120, 130, and 140 is disposed not only in the straight portions 121, 131, and 141 (122, 132, and 142) but also in the curved portions 123, 133, and 143. . In the present embodiment, the first flat tube 120, the second flat tube 130, the first straight portions 121, 131, and 141 of the third flat tube 140 and the second straight portion 122 which are adjacent to each other. , 132, 142 and curved portions 123, 133, and 143 are parallel to each other.

Therefore, when comparing the curved portions 123, 133, and 143 of the first to third flat tubes 120, 130, and 140, the radius of curvature R3 of the curved portions 143 of the third flat tube 140 is compared. The smallest half (L / 2) of the gap between the flat tube (120, 130, 140), and the curved portion 133 of the second flat tube 130, the curve of the first flat tube 120 In order of portion 123, the radius of curvature is formed larger. That is, in the case of the first flat tube 120 and the second flat tube 130, the radius of curvature (R1, R2) at the time of bending production is half of the interval between the flat tubes (120, 130, 140) ( L / 2), so that even if bent, the radius of curvature of the inner cross section, compared to the case where the radius of curvature is formed to be half (L / 2) of the gap between the respective flat tube (120, 130, 140) It has the advantage of being able to produce less deformation and with less force.

Meanwhile, the first straight portions 121, 131, and 141 allow the refrigerant to flow from one of the headers 20 and the curved portions 123, 133, and 143 of the flat tube 11 to the other, The second straight portions 122, 132, and 142 allow the refrigerant to flow from one of the header 20 and the other of the curved portions 123, 133, and 143 of the flat tube. That is, the refrigerant flow direction in the first straight portions 121, 131, and 141 and the refrigerant flow direction in the second straight portions 122, 132, and 142 are opposite. In this case, as described above, the first straight portions 121, 131, and 141 and the second straight portions 122, 132, and 142 correspond to each other by the plurality of curved portions 123, 133, and 143, respectively. Since the communication is included in each of the one flat tube (120, 130, 140), the refrigerant therein is independently flow for each of the linear portions 121, 122 (131, 132) (141, 142) that communicate with each other Of course.

The first to third flat tubes form one heat exchange unit (X). Then, this embodiment is provided with a plurality of heat exchange unit (X), in Figure 1 is shown as an example that nine heat exchange unit (X) is formed.

The header 20 is formed with a first partition 21 to allow the refrigerant flowing through the plurality of heat exchange units X to be partitioned with each other.

That is, the partitions 21 partition the inner space of the header 20 so that the refrigerant flowing through the heat exchange unit X is not mixed with each other in the header 20. Then, the header 20 is formed with a plurality of chambers (C) through which the refrigerant of each heat exchange unit (X) flows.

In order to prevent the refrigerant of the first straight portions 121, 131, and 141 and the refrigerant of the second straight portions 122, 132, and 142 from being mixed with each other in the chamber C, the header 20 is prevented from being mixed with each other. ), A chamber partition 21 for partitioning the chamber C into the first chamber A and the second chamber B is formed.

The refrigerant flow in the heat exchanger 10 will be briefly described.

When the heat exchanger 10 acts as a condenser, the refrigerant is introduced into the first chamber A of the header 20 and then distributed to the first straight portions 121, 131, and 141. The refrigerant distributed to the first straight portions 121, 131, and 141 flows into the curved portions 123, 133, and 143 and then flows into the second straight portions 122, 132, and 142. The refrigerant in the second straight portions 122, 132, and 142 moves to the second chamber B of the header 20.

On the other hand, when the heat exchanger 10 acts as an evaporator, the refrigerant is introduced into the second chamber B of the header 20 and then distributed to the second straight portions 122, 132, and 142. The refrigerant distributed to the second straight portions 122, 132, and 142 flows into the curved portions 123, 133, and 143, and then flows into the first straight portions 121, 131, and 141. In addition, the refrigerant of the first straight portions 121, 131, and 141 moves to the first chamber A of the header 20.

Meanwhile, the first distributor 40 is connected to the header 20 by a plurality of connection tubes 50. At this time, the connection tube 50 communicates with the first chamber A of the header 20. In addition, the connection tube 50 is provided in the same number as the number of the heat exchange unit (X).

In addition, the first distributor 40 is formed with a connection pipe 42 for the refrigerant flow. The connection pipe 42 serves as an inlet for the refrigerant when the heat exchanger 10 acts as a condenser, and serves as an outlet for the refrigerant when the heat exchanger 10 acts as an evaporator.

The capillary 60 includes a main portion 61 and a plurality of branch portions 62 branched from the main portion 61. The plurality of branches 62 are connected to a plurality of capillary connecting portions 24 formed in the header 20, respectively.

The plurality of branches 62 are in communication with the second chamber B of the header 20, respectively. In addition, the plurality of branch parts 62 and the plurality of capillary connection parts 24 are provided in the same number as the number of the heat exchange units X.

The header 20, the connection tube 50, and the first distributor 40 may be formed of, for example, aluminum, and the capillary 60 may be formed of, for example, copper. In addition, the capillary 60 may be coupled to the capillary connector 24 by low temperature welding.

The second distributor 70 is located below the heat exchanger 10. In addition, the main part 61 is connected to an upper surface of the second distributor 70.

Meanwhile, referring to FIG. 3, a brazing filler metal layer 13 is formed on the contact surfaces of the flat tubes 11 and the fins 12. The brazing filler metal layer 13 is formed as a sheet-like brazing filler material bonded or attached to the flat tube 10 is heated.

The brazing filler metal layer 13 allows the flat tube 11 and the fin 12 to be firmly fixed. In addition, as the brazing material, a clad may be used. At this time, the melting point of the brazing filler material is lower than the melting point of the flat tube and the fin 12.

In addition, although not shown, a solder material layer may be formed on the contact surface of each of the flat tube 11 and the header 20. In addition, although not shown, a brazing filler layer may be formed on the contact surface of the connection tube 50 and the header 20 and the contact surface of the connection tube 50 and the first distributor 40.

Hereinafter, a manufacturing process of the refrigerant system will be described.

First, a plurality of flat tubes 11 of a predetermined length have different radii of curvature, and are bent so that both ends are parallel to each other in the same direction. In detail, in the present embodiment, the radius of curvature R1 of the curved portion 143 of the third flat tube 140 is equal to half (L / 2) of the spacing between the flat tubes 120, 130, and 140. The same length. Next, the radius of curvature R2 of the curved portion 133 of the second flat tube 130 is larger than the radius of curvature R3 of the curved portion 143 of the third flat tube 140. In addition, the radius of curvature R1 of the curved portion 143 of the first flat tube 140 is larger than the radius of curvature R2 of the curved portion 143 of the second flat tube 140.

At this time, the smaller the radius of curvature of the curved portion (123, 133, 143) to be bent, the more difficult the machining, the radius of curvature (R1, R2) of the curved portion (123, 133, 143) of the plurality of flat tube 11 , R3) is a length, such as half (L / 2) of the distance between the plurality of flat tubes 11, there is an advantage that the processing is easier.

Next, the solder material is bonded or attached to the straight portions 121, 131, and 141 (122, 132, and 142) of the plurality of flat tubes 11. Then, the straight portions 121, 131, 141 (122, 132, 142) of the plurality of flat tubes 11 to which the brazing material is attached are penetrated to the plurality of pins 12.

Thereafter, both ends of the plurality of flat tubes 11 having the brazing material attached to each other in the same direction are penetrated through the header 20.

Then, the solder material is bonded or attached to both ends of the plurality of connection tubes (50). In addition, one side of the plurality of connecting tubes 50 having a brazing filler material is coupled to the header 20, and the other side of the plurality of connecting tubes 50 having the brazing filler material is coupled to the first distributor 40. Let's do it.

Then, the heat exchanger 10 (composed of a header, fins and flat tubes) connected to the first distributor 40 is heated. For example, the heat exchanger 10, the connecting tube 50 and the first distributor 40 are heated to a temperature of approximately 580-612 ^° C. The heating of the heat exchanger 10, the connecting tube 50, and the first distributor 40 is for heating and melting the brazing filler metal.

Then, between the flat tube 11 and the fin 12, between the flat tube 11 and the header 20, between the connecting tube 50 and the header 20 and between the connecting tube 50 and the A brazing filler material layer is formed between the first distributors 40 and is fixed to each other. Then, the capillary 60 and the header 20 connected to the second distributor 70 are coupled by low temperature welding.

According to this embodiment, by simultaneously heating the components between the components constituting the heat exchanger 10 and the heat exchanger 10 and the connection tube 50 and the connection tube 50 and the first distributor 40, Since each can be fixed at the same time, there is an advantage that the refrigerant system 1 can be manufactured simply.

In addition, in the present embodiment, the flat tube 11 of a predetermined length is bent at a predetermined curvature so that both ends thereof are parallel to each other in the same direction, and thus the both ends thereof are coupled to the header 20. The manufacturing of the flat tube 11 is simplified, there is an advantage that the coupling of the header 20 and the flat tube 11 is simplified.

Next, the operation of the refrigerant system 1 will be described.

First, when the heat exchanger 10 acts as a condenser, the refrigerant of the gaseous phase discharged from the compressor (not shown) is introduced into the first distributor 40 through the connection pipe 42. The refrigerant introduced into the first distributor 40 is distributed to each connection tube 50, and the refrigerant of each connection tube 50 flows into the first chamber A of the header 20, respectively. do.

The refrigerant introduced into the first chamber A is distributed to the first straight portions 121, 131, and 141. The coolant of the first straight portions 121, 131, and 141 passes through the curved portions 123, 133, and 143 and the second straight portions 122, 132, and 142, and then the header 20. Move to the second chamber (B). At this time, the refrigerant is condensed in the process of flowing to each of the linear portions 121, 131, 141 (122, 132, 142) and the curved portions (123, 133, 143). The refrigerant moved to the second chamber B is expanded while passing through the capillary 60 and then flows into the second distributor 70. Then, the refrigerant moved to the second distributor 70 is moved to the compressor through a heat exchanger acting as an evaporator (not shown).

On the other hand, when the heat exchanger 10 acts as an evaporator, two-phase refrigerant of liquid and gaseous phase is distributed from the second distributor 70 to the capillary 60.

When the refrigerant is completely condensed while passing through the condenser, the refrigerant passing through the condenser is in a liquid state. However, the refrigerant which has substantially passed through the condenser cannot be a perfect liquid phase, but becomes an abnormal state of the liquid phase and the gaseous phase.

Here, in the present embodiment, the main part 62 of the capillary 60 is coupled to the upper surface of the second distributor 70, and each branch part 62 is branched from the main part 61. The refrigerant may be uniformly distributed from the second distributor 70 to each branch 62. That is, only one liquid phase refrigerant is distributed to one of the branch portions 62, and only the gaseous phase refrigerant is distributed to the other branch portions 62.

The refrigerant introduced into the capillary 60 undergoes an expansion process, and the expanded refrigerant flows into the second chamber B of the header 20, respectively. The refrigerant introduced into the second chamber B is distributed to the second straight portions 122, 132, and 142. After the refrigerant flowing into the second straight portions 122, 132 and 142 flows to the curved portions 123, 133 and 143 and the first straight portions 121, 131 and 141, the header It evaporates while moving to the first chamber A of 20. At this time, the refrigerant is evaporated in the process of flowing to each of the straight portion (122, 132, 142) (121, 131, 141) and the curved portion (123, 133, 143). The refrigerant moved to the first chamber A is moved to the first distributor 40 through the connecting tube 50. In addition, the refrigerant moved to the first distributor 40 passes through the connecting pipe 42 to a compressor (not shown).

Here, while the heat exchanger 10 acts as an evaporator, condensed water is generated during the heat exchange process between the refrigerant and the external fluid. At this time, in the case of the present embodiment, the flat tube 11 is coupled through the pin 12, so that the generated condensate can easily flow along the pin 12.

1 is a view showing the structure of a refrigerant system according to an embodiment.

2 is an enlarged view of a portion X in FIG. 1;

3 is a partial vertical cross-sectional view of a heat exchanger according to the embodiment.

Claims (13)

A plurality of flat tubes each having a plurality of refrigerant passages formed therein, each having a plurality of straight portions and at least one curved portion, and at least one other tube disposed between the two straight portions; A header having a plurality of first chambers connected to the refrigerant inlet of the flat tube and a plurality of second chambers connected to the refrigerant outlet; A distributor connected to the first chamber to guide the flow of the refrigerant; A connection tube interposed between the distributor and the first chamber, the connecting tube connecting the distributor and the first chamber; And A capillary having a main part connected to the second chamber to guide the flow of the refrigerant, and a plurality of branch parts branched from the main part to connect the second chamber and the main part, respectively; Refrigerant system configured to include. The method of claim 1, Refrigerant system in which the radius of curvature of the curved portion of each tube is formed different The method of claim 1, And a plurality of fins through which the plurality of tubes pass. The method of claim 1, The first chamber and the second chamber are partitioned, And each of the flat tubes communicates the first chamber and the second chamber with each other. The method of claim 1, In the two straight portions, A first straight portion connecting the first chamber and the curved portion; Refrigerant system including a second straight portion connecting the second chamber and the curved portion. 6. The method of claim 5, The straight portion, A plurality of first linear portions are sequentially arranged; A refrigerant system in which a plurality of second straight portions are sequentially disposed below the first straight portion. The method of claim 1, Each of the first chamber and the second chamber is provided with a plurality, And the first chamber and the second chamber are alternately disposed. The method of claim 1, Between the branch portion and the second chamber, And a capillary connection portion connecting the branch portion and the second chamber. delete The method of claim 1, Further comprising a pin through the plurality of tubes, And a brazing material layer formed by melting a sheet-like brazing material at a contact portion of each of the fins and the plurality of tubes. The method of claim 1, And a brazing filler metal layer formed by melting brazing filler metal at a contact portion between the respective tubes and the headers. A plurality of refrigerant passages each formed therein, each having a plurality of straight portions and one or more curved portions, each of the at least two curved portions having a plurality of flat tubes having different radii of curvature; A plurality of pins through which the plurality of flat tubes pass; A header connected to the straight portion having a plurality of first chambers connected to the refrigerant inlet of the flat tube and a plurality of second chambers connected to the refrigerant outlet; A first distributor connected to the first chamber to guide the flow of the refrigerant; A plurality of connection tubes interposed between the first chamber and the first distributor, connecting the first distributor and the first chamber; A capillary having a main part connected to a space where the refrigerant of the header is discharged, and a plurality of branch parts branched from the main part to connect the header and the main part; And A second distributor connected with the capillary; Refrigerant system comprising a. 11. The method of claim 10, The curved portion of each tube is arranged in parallel with each other refrigerant system.

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