KR20150136086A - Manifold and heat exchanger having same - Google Patents

Abstract

The manifold (1) comprises an axially extending inner cavity (20) and a plurality of axially extending individual portions (11, 12); The inner cavity 20 includes a refrigerant inflow cavity 18 and a refrigerant dispense cavity 19 separated from each other and in fluid communication with each other and the refrigerant enters the refrigerant inflow cavity 18 and is supplied by the refrigerant dispense cavity 19 Is distributed to the heat exchanger tube (2); The refrigerant inflow cavity 18 and the refrigerant dispense cavity 19 are formed by continuously arranging and connecting a plurality of axially extending portions 11 and 12 in an assembling direction perpendicular to the axial direction, 1 is composed of a plurality of individual portions 11, 12. The manifold 1 connects the plurality of individual portions 11, 12 thereby improving the two-phase flow distribution to the heat exchanger, enhancing heat exchange performance, increasing product quality safety, Thereby solving the existing problems of high cost of the tubes.

Description

≪ Desc / Clms Page number 1 > MANIFOLD AND HEAT EXCHANGER HAVING SAME < RTI ID =

The present invention relates to a heat exchanger including a collecting pipe and a collecting pipe.

The heat exchanger disclosed in U.S. Patent Application No. 2011 / 0315363A1 includes a first collection pipe and a second collection pipe. The distribution plate is longitudinally arranged in the first collection tube so as to divide the first collection tube into a cooling medium inlet and a cooling medium distribution section and is provided with a plurality of channels of flat tubes Extends into the first collection tube. Each of the plurality of channels having a first end contacting the distribution plate of the first flow pipe and a second end disposed within the second flow pipe, wherein the plurality of generally parallel flow paths comprise a first flow pipe and a second flow pipe, Two flow tubes, and is at least partially blocked by the distribution plate. An outer wall at one end of the plurality of channels of flat tubes is removed to allow cooling medium to enter the interior of the flat tubes from the distribution chambers.

The heat exchangers disclosed in U.S. Patent Application No. 2011 / 0315363A1 still use high frequency welded collecting tubes, which does not solve the problem of high cost of high frequency welded tubes. In addition, the distribution plate is inserted into the inlet flow tube, which increases the complexity of the manufacturing process and makes it difficult to control the product quality. Moreover, the ends of the flat tubes that contact the distribution plate tend to be blocked by welding.

SUMMARY OF THE INVENTION The present invention provides a heat exchanger having a collection tube and a collection tube that can solve the high cost problem of high frequency welded tubes and improve the heat exchange performance.

According to one aspect of the present invention there is provided a collection tube comprising: an inner chamber extending in an axial direction and a plurality of axially extending individual components, wherein the axially extending inner chambers are separated from each other, A communicating refrigerant inlet chamber and a refrigerant dispense chamber; And at least one of the refrigerant inlet chamber and the refrigerant distribution chamber or the condenser tube is divided into a plurality of axially extending individual components Are continuously arranged in the assembling direction perpendicular to the axial direction and connected to each other.

According to another aspect of the present invention, the plurality of axially extending individual components include respective first and second components, wherein the first component includes one of the refrigerant inlet chamber and the refrigerant distribution chamber Wherein at least a portion of the wall of the first component and the second component forms the other of the refrigerant inlet chamber and the refrigerant distribution chamber by disposing and connecting the first and second components in the assembly direction.

According to another aspect of the present invention, the first component includes a first U-shaped wall portion; The step portions extending outwardly from the two ends of the first U-shaped wall portion; And second wall portions extending from the outer ends of the step toward the side away from the first U-shaped wall portion.

According to another aspect of the present invention, the first component includes a first U-shaped wall portion; The step portions extending outwardly from the two ends of the first U-shaped wall portion; Second wall portions extending from the outer ends of the step toward the side away from the first U-shaped wall portion; And a partition wall portion extending between the inner ends of the step portion.

According to another aspect of the present invention, the first component further includes protrusions formed on the partition wall portion and spaced from the second wall portions at a predetermined distance.

According to another aspect of the present invention, as viewed in cross-section, the first component comprises a first arcuate wall portion; Step portions extending outwardly from two ends of the first arcuate wall portion; And second arcuate wall portions extending from the outer ends of the step toward the side away from the first arcuate wall portion.

According to another aspect of the present invention, as viewed in cross-section, the first component comprises a first arcuate wall portion; Step portions extending outwardly from two ends of the first arcuate wall portion; Second arcuate wall portions extending from the outer ends of the step towards the side away from the first arcuate wall portion; And a partition wall portion extending between the inner ends of the step portion.

According to another aspect of the present invention, the first component includes protrusions formed on the partition wall portion and spaced from the second arcuate wall portions at a predetermined distance.

According to another aspect of the present invention, the plurality of axially extending individual components include respective first, second and third components, wherein the first component, the third component, By sequentially arranging and connecting the components in the assembling direction, a coolant inlet chamber is formed between the first component and the third component, and a coolant distributing chamber is formed between the third component and the second component .

According to another aspect of the present invention, the first component includes a first U-shaped wall portion; The step portions extending outwardly from the two ends of the first U-shaped wall portion; And second wall portions extending from the outer ends of the step toward the side away from the first U-shaped wall portion.

According to a further aspect of the present invention, the second component has an inverted U-shaped wall portion as seen in cross section, and the two ends of the inverted U-shaped wall portion of the second component are connected to the first component And is disposed inside the second wall portions.

According to another aspect of the present invention, the first U-shaped wall portion has a substantially circular arc shape in cross section.

According to another aspect of the present invention, when viewed in cross section, the second wall portions are substantially arc-shaped.

According to a further aspect of the present invention, the inverted U-shaped wall portion of the second component, when viewed in cross-section, is substantially arc-shaped.

According to another aspect of the present invention, as viewed in cross-section, the first component comprises a first arcuate wall portion; Step portions extending outwardly from two ends of the first arcuate wall portion; And second arcuate wall portions extending from the outer ends of the step toward the side away from the first arcuate wall portion.

According to another aspect of the present invention, the third component has a first end and a second end, the first and second ends of the third component being located on each of the steps, And connected to these steps.

According to a further aspect of the present invention there is provided a method of manufacturing a plasma display panel, the method comprising the steps of: And is disposed inside the arc-shaped wall portions.

According to another aspect of the present invention, a central angle corresponding to each component of each of the plurality of axially extending components constituting the outer wall of the collector tube when viewed in cross-section is less than 360 DEG, , A central angle corresponding to a portion of each component of each of the plurality of axially extending components constituting the outer wall of the collection pipe which forms the outer surface of the collection pipe is less than 360 DEG.

According to another aspect of the present invention, the width of the portion of the inverted U-shaped wall portion of the second component overlapping the second wall portions of the first component is 3 mm or more.

According to another aspect of the present invention, the central angle corresponding to the first component, when viewed in cross-section, is approximately equal to or less than 180 degrees.

According to another aspect of the present invention, the partition wall portion protrudes toward the refrigerant distribution chamber.

According to another aspect of the present invention, a refrigerant pipeline is integrally formed on a surface of the partition wall on a side remote from the refrigerant distribution chamber, the refrigerant pipeline being spaced from the first U-shaped wall.

According to another aspect of the present invention, the inside of the collection pipe is substantially circular.

According to one aspect of the invention, there is provided a heat exchanger comprising heat exchange tubes and a collection tube as described above, wherein the ends of the heat exchange tube are in fluid communication with a refrigerant distribution chamber of the collection tube.

According to another aspect of the present invention, the collection tube has a plurality of openings formed in the tube wall of the collection tube and disposed in the axial direction, and the end of the heat exchange tube has a stepped portion, and is inserted into the opening, At least a portion of the step of the tube contacts the peripheral portion of the opening.

According to another aspect of the invention, the refrigerant inlet chamber and the refrigerant distribution chamber are separated by a partition wall portion and are in fluid communication with one another through holes in the partition wall portion, at least one of the holes being provided between two adjacent heat exchange tubes do.

In the present invention, the inlet and outlet tubes of the heat exchanger are formed by welding a plurality of components or connecting them in different ways, some of which divide the collection tube into two or more separate chambers, And one of the remaining chambers is a refrigerant inlet chamber, and the refrigerant inlet chamber communicates with the refrigerant distribution chamber through a circular hole or other type of opening. In this manner, the cooling medium entering the collection tube enters the refrigerant distribution chamber from the inlet chamber through the openings between the two chambers, the plurality of openings are distributed in the longitudinal direction of the collection tube, The tubes or the plurality of flat tubes correspond to at least one opening, after which the cooling medium can achieve the purpose of entering the flat tubes from the refrigerant distribution chamber and distributing the cooling medium uniformly.

The inventive heat collecting tube of the heat exchanger is formed by welding or otherwise connecting two or more individual components so that the cross section of the collecting tube is divided into at least two individual chambers. Furthermore, the inside of the cross section of the collection pipe formed by assembling a plurality of individual components is circular. As the collection tube is formed by connecting a number of components, the high cost problem of high frequency welded tubes can be solved. Since the inner side of the cross section of the collector pipe is circular, a circular end cover with high machining convenience and high reliability can be used. The process of inserting the distribution plate into the inside of the collection pipe is omitted and the complexity of the process is greatly reduced.

1 is a schematic view of a heat exchanger according to a first embodiment of the present invention.
2 is a schematic partial cross-sectional view of a heat exchanger according to a first embodiment of the present invention.
3 is a schematic partial cross-sectional view of a heat exchanger according to a second embodiment of the present invention.
4 is a schematic partial cross-sectional view of a heat exchanger according to a third embodiment of the present invention.
5 is a schematic partial cross-sectional view of a heat exchanger according to a fourth embodiment of the present invention.

Example 1

1, a heat exchanger 100, such as a micro-channel heat exchanger, according to an embodiment of the present invention includes a collection tube 1, 7 (e.g., an inlet tube 1 and an outlet tube 2) Tube 7); Heat exchange tubes (2) such as flat tubes; Fins (5) disposed between the heat exchange tubes (2); And side plates (3). The heat exchanger can be used in the fields of heating ventilation air conditioner, vehicle, refrigeration and the like, and can also be used as a heat exchanger, for example, an evaporator, a condenser and a water tank. The ends of the heat exchange tube (2) are in fluid communication with the refrigerant distribution chamber (19) of the collection tube. The end of the heat exchange tube (2) is connected to the end of the heat exchange tube (1) in the axial direction of the heat exchange tube (1) Such as a step located at a predetermined distance from the end face of the heat exchange tube 1. The cross section of the heat exchange tube 1 between the end face of the end portion and the step portion is smaller than the cross section of the remaining portion of the heat exchange tube 1. [ An end portion of the heat exchange tube 2 is inserted into the opening portion, and at least a part of the step portion of the heat exchange tube 2 is in contact with the peripheral portion of the opening portion. In this way, the length of the heat exchange tubes 1 inserted into the collection tubes 1, 7 can be controlled and the means for positioning the heat exchange tubes 1 is reduced, The uniformity of the length of the heat exchange tubes 1 inserted into the tubes 7 can also be ensured.

1 and 2, a collecting pipe 1 according to a first embodiment of the present invention includes an inner chamber 20 extending in an axial direction and a plurality of axially extending individual components 11 Wherein the inner chamber 20 includes a refrigerant inlet chamber 18 and a refrigerant dispensing chamber 19 separated from each other and in fluid communication with each other and a refrigerant inlet chamber 18 into which the refrigerant in the refrigerant dispensing chamber 19 , Wherein at least one of the refrigerant inlet chamber (18) and the refrigerant distribution chamber (19) or the collection tube (1) comprises individual components extending in the axial direction 11 and 12 are continuously arranged and connected in the assembling direction A perpendicular to the axial direction. The components 11, 12 may be connected together by welding or other connection methods.

As shown in Figure 2, the inner chamber 20 may have a generally circular cross-section; Also, optionally, the cross section of the inner chamber 20 may be generally oval or other shapes.

As shown in FIG. 2, a plurality of axially extending individual components 11, 12 include respective first and second components 11, 12. The first component 11 comprises one of a refrigerant inlet chamber 18 and a refrigerant distribution chamber 19. In the example shown in FIG. 2, the first component 11 includes a refrigerant inlet chamber 18. At least a part of the walls of the first component 11 and the second component 12 are arranged and connected by the first component 11 and the second component 12 in the assembly direction A, And at least a portion of the walls of the first component 11 and the second component 12 form the other of the refrigerant distribution chamber 18 and the refrigerant distribution chamber 19, To form a dispensing chamber 19.

2, the first component 11 has a first arcuate wall portion 111 (an example of a first U-shaped wall portion), a second arcuate wall portion 111, ; Step portions 112 extending outwardly from two ends of the first arcuate wall portion 111; Second arcuate wall portions 113 (examples of second wall portions) extending from the outer ends of the step portion 112 toward the side remote from the first arcuate wall portion 111; And a partition wall portion (114) extending between the inner ends of the step portion (112).

2, the second component 12 has an arcuate wall portion (an example of inverted U-shaped wall portion), and the second component 12 has an arc-shaped wall portion 2 Are disposed inside the second arcuate wall portions (113) of the first component (11). The arcuate wall portion of the second component 12 and the two ends of the second arcuate wall portion 113 of the first component 11 may be connected together by welding or the like.

2, a refrigerant pipeline 115 is integrally formed on a surface of the partition wall portion 114 on a side remote from the refrigerant distribution chamber 19, and the refrigerant pipeline 115 is divided into a first And is spaced apart from the arcuate wall portion 111. The refrigerant inlet chamber 18 is formed by a refrigerant pipeline 115. The chamber 17 is formed between the partition wall portion 114, the refrigerant pipeline 115 and the first arcuate wall portion 111.

2, the partition wall portion 114 protrudes toward the refrigerant distribution chamber 19. As shown in Fig. 2, the refrigerant inflow chamber 18 and the refrigerant distribution chamber 19 are separated by a partition wall portion 114 and are in fluid communication with each other through the apertures 14 of the partition wall portion 114. As shown in FIG. Each of the heat exchange tubes 2 corresponds at least to one hole 14, that is, the number of the holes 14 is at least equal to the number of the heat exchange tubes 2. As shown in Figure 1, for example, the location 4 of each hole 14 is between two adjacent heat exchange tubes 2 in the longitudinal or axial direction of the collecting tube 1. At least one hole such as a circular hole or an opening is provided between two adjacent heat exchange tubes 1 in the longitudinal direction or the axial direction of the collecting tube 1. [ In this way, the uniformity of the introduction of the cooling medium into the heat exchange tubes 1 can be ensured and the cooling medium flows from the refrigerant inlet chamber 18 to the refrigerant distributor chamber 19, The vapor and the liquid are homogeneously mixed and then reintroduced into the heat exchange tubes 1 thereby ensuring the uniformity of the cooling medium in the heat exchange tubes 1 and ensuring the heat exchange performance Can be improved.

As one option, each of the heat exchange tubes 1 corresponds to at least one hole 14 in the longitudinal direction or the axial direction of the collecting tube 1, The number of holes 14 in the position is less than three.

As shown in Fig. 2, a central angle corresponding to each component of each of the plurality of axially extending individual components 11, 12 constituting the outer wall of the collector pipe 1, when viewed in cross section, (11, 12) of each of the plurality of axially extending components (11, 12) constituting the outer wall of the collecting tube (1) when viewed in cross section, The central angle corresponding to the portion forming the outer surface of the substrate 1 is less than 360 DEG or less than 270 DEG. As shown in FIG. 2, the central angle corresponding to the first component 11, when viewed in cross section, is less than approximately 180 degrees, thereby facilitating the installation of the second component 12.

In Embodiment 1, the collection tube 1 of the heat exchanger 100 is formed by welding two or more individual components or connecting them in different ways, whereby the cross section of the collection tube 1 is at least 2 Are divided into individual chambers. Furthermore, the inside of the cross section of the collection pipe formed by assembling a plurality of individual components is circular. As the collection tube is formed by connecting a number of components, the high cost problem of high frequency welded tubes can be solved. Since the inner side of the cross section of the collector pipe is circular, a circular end cover with high machining convenience and high reliability can be used. In addition, the process of inserting the distribution plate into the collection tube is omitted, which greatly reduces the complexity of the process. Since the inside of the collection pipe 1 is substantially circular, the built-in end cover can be designed in a circular shape, thereby ensuring that the collection pipe 1 has a simple structure and good sealing performance.

Further, as shown in Fig. 2, the line 119 connecting the ends of the second arcuate wall portion 113 does not exceed the centerline of the inner circle of the cross section. In this way, installation in the manufacturing process is convenient, process complexity is reduced, and reliability is ensured.

Further, as shown in Fig. 2, the width of each second arcuate wall portion 113 overlapping the arcuate wall portion of the second component 12 is 3 mm or more. In this way, welding can be easily achieved from a technical point of view and the weld strength of the collector tube can also be improved, thereby alleviating the problem of low compressive strength of the multi-sheet collector tubes.

The inventive collection tube (1) comprises a refrigerant inlet chamber and a refrigerant distribution chamber communicating through holes (14) such as circular holes or other types of openings. In this way, the amount of refrigerant entering the refrigerant distribution chamber can be determined on demand, thereby improving the distribution of the refrigerant.

The ends of the heat exchange tubes 2, such as flat tubes, adopt a reduced aperture configuration, these ends are inserted into the openings of the collection tube 1 and the reduced openings are used for positioning Used for; 2, it is possible to avoid the welding clogging caused by the contact between the heat exchange tubes 2 such as the flat tubes and the partition wall portion 114 of the collection tube 1.

Example 2

As shown in Fig. 3, the second embodiment according to the present invention is further improved based on the first embodiment. Particularly, the first component 11 further includes protrusions 116 which are formed on the partition wall portion 114, such as the surface of the partition wall portion 114 facing the refrigerant distribution chamber 19, And is spaced from the second arcuate wall portions 113 at a predetermined distance. This distance may be approximately the same as the thickness of the two ends of the arcuate wall portion of the second component 12 so that the two ends of the arcuate wall portion of the second component 12 are spaced from the protrusions 116 And is inserted between the second arcuate wall portions 113. With the provision of the protrusions 116, it is possible to ensure good contact between the two individual components 11, 12 and the weld strength is improved.

Example 3

As shown in Fig. 4, a plurality of axially extending individual components 11, 12 and 13 comprise individual first, second and third components 11, 13); The first component 11, the third component 13 and the second component 12 are successively arranged and connected together in the assembly direction A, for example the first component 11, The third component 13 and the second component 12 are connected together by welding. A refrigerant inlet chamber 18 is formed between the first component 11 and the third component 13 and a refrigerant distribution chamber 19 is defined between the third component 13 and the second component 12 As shown in FIG.

As shown in Fig. 4, in cross-section, for example in the cross-section shown in Fig. 4, the first component 11 comprises a first arcuate wall portion 111; Step portions 112 extending outwardly from two ends of the first arcuate wall portion 111; And second arcuate wall portions 113 extending from the outer ends of the step portion 112 toward the side remote from the first arcuate wall portion 111. Viewed in cross-section, the third component 13 has a first end and a second end, and the first and second ends of the third component 13 are each positioned on the steps 112 Are connected to these steps.

4, the refrigerant inlet chamber 18 and the refrigerant distribution chamber 19 are in fluid communication with each other through the apertures 14 of the third component 13. As shown in Fig. The third component 13 is projected toward the refrigerant distribution chamber 19.

As shown in Fig. 4, the individual components 11, 12, 13 constituting the collection pipe 1 are in contact with each other, and in this contact portion, one component 11 is divided into two (12, 13).

As shown in Figure 4, the ends of the heat exchange tubes 2, such as flat tubes, adopt a reduced aperture configuration, which is inserted into the openings of the collection tube 1, Lt; RTI ID = 0.0 > (1) < / RTI > As shown in Fig. 4, it is possible to avoid weld clogging caused by the contact between the heat exchange tubes 2, such as flat tubes, and the third component 13 of the collection tube 1.

Example 4

The fourth embodiment according to the present invention is further improved based on the first embodiment. In particular, as shown in FIG. 5, the collection tube 1 does not have a refrigerant pipeline 115 as shown in FIG. 2, and the refrigerant inlet chamber 18 has a first circular arc wall portion 111 Is formed by the partition wall portion (114).

The embodiments shown in Figs. 2 and 3 provide advantages for the embodiments shown in Figs. 4 and 5, while further ensuring that the other components and process are the same, further reducing the refrigerant inlet chamber 18 Thereby relieving the problem of the separation of the two-phase cooling medium after the cooling medium enters the collection tube 1, improving the distribution of the cooling medium, and improving the heat exchange performance of the heat exchanger.

In the above-described embodiments, the collection pipe 1 is used as an inlet collection pipe, but this collection pipe 1 can also be used as a discharge collection pipe.

The present invention is also directed to a system and method for a two-phase flow distribution system in which a plurality of individual components are connected together, thereby alleviating the problem of two-phase flow distribution in a heat exchanger such as a micro-channel heat exchanger, Quot; is provided. Further, by the simple assembly process in the present invention, unstable product quality problems can be alleviated. Further, the present problem of high cost of high frequency welded pipes is solved by the present invention.

Although the circular embodiments of the present invention have been described in the foregoing embodiments, the above-described embodiments may also be suitable for collection tubes having other cross-sectional shapes such as elliptical collecting tubes and rectangular collecting tubes. In the case of a collection tube of any suitable shape, the first arcuate wall portion in the above embodiments is the first U-shaped wall portion and the second arcuate wall portion is the second wall portion. The arcuate wall portion of the second component is an inverted U-shaped wall portion of the second component.

Claims (20)

CLAIMS What is claimed is: 1. A collection tube, comprising: an axially extending inner chamber and a plurality of axially extending individual components,
Said axially extending inner chamber comprising a refrigerant inlet chamber and a refrigerant dispense chamber separated from each other and in fluid communication with each other; And a refrigerant that enters the refrigerant inlet chamber and is distributed to the heat exchange tubes in the refrigerant distribution chamber,
Wherein at least one of the refrigerant introduction chamber and the refrigerant distribution chamber or the collection tube is formed by continuously arranging and connecting a plurality of axially extending individual components in an assembling direction perpendicular to the axial direction. The method according to claim 1,
Wherein each of the plurality of axially extending components includes respective first and second components, wherein the first component comprises one of the refrigerant inlet chamber and the refrigerant distribution chamber, the first component And at least a portion of a wall of the second component forms the other of the refrigerant inlet chamber and the refrigerant distribution chamber by disposing and connecting the first and second components in the assembly direction. 3. The method of claim 2,
Viewed in cross-section, the first component comprises a first U-shaped wall portion; The step portions extending outwardly from the two ends of the first U-shaped wall portion; And second wall portions extending from the outer ends of the step toward the side away from the first U-shaped wall portion. 3. The method of claim 2,
Viewed in cross-section, the first component comprises a first U-shaped wall portion; The step portions extending outwardly from the two ends of the first U-shaped wall portion; Second wall portions extending from the outer ends of the step toward the side away from the first U-shaped wall portion; And a partition wall portion extending between the inner ends of the step portion. 5. The method of claim 4,
Wherein the first component further comprises protrusions formed on the partition wall portion and spaced from the second wall portions at a predetermined distance. The method according to claim 1,
Wherein each of the plurality of axially extending components includes respective first, second and third components, wherein the first component, the third component, and the second component are continuously Wherein a refrigerant inlet chamber is formed between the first component and the third component and a refrigerant distribution chamber is formed between the third component and the second component. The method according to claim 6,
Viewed in cross-section, the first component comprises a first U-shaped wall portion; The step portions extending outwardly from the two ends of the first U-shaped wall portion; And second wall portions extending from the outer ends of the step toward the side away from the first U-shaped wall portion. 8. The method of claim 7,
The third component having a first end and a second end, wherein the first and second ends of the third component are positioned on the steps and connected to the steps, respectively, Collection pipe. 8. The method according to claim 3 or 7,
The second component has an inverted U-shaped wall portion and two ends of the inverted U-shaped wall portion of the second component are disposed inside the second wall portions of the first component , A collection tube. 9. The method according to any one of claims 3 to 5, 7, and 8,
The first U-shaped wall portion, when viewed in cross-section, has a generally circular arc shape. 9. The method according to any one of claims 3 to 5, 7, and 8,
Wherein the second wall portions are substantially arc-shaped when viewed in section. 10. The method of claim 9,
Wherein the inverted U-shaped wall portion of said second component, when viewed in cross-section, is substantially arc-shaped. 10. The method of claim 9,
Wherein the width of the portion of the inverted U-shaped wall portion of the second component overlapping the second wall portions of the first component is at least 3 mm. 7. The method according to claim 2 or 6,
Wherein the central angle corresponding to the first component when viewed in cross-section is not greater than about 180 degrees. 5. The method of claim 4,
Wherein the partition wall portion protrudes toward the refrigerant distribution chamber. 5. The method of claim 4,
A refrigerant pipeline is integrally formed on a surface of the partition wall on a side remote from the refrigerant distribution chamber, the refrigerant pipeline being spaced apart from the first U-shaped wall. The method according to claim 1,
Wherein the inside of the collection pipe is substantially circular. Heat exchange tubes; And
11. A water treatment system comprising a collection tube according to claim 1,
Wherein the ends of the heat exchange tube are in fluid communication with a refrigerant distribution chamber of the collection tube. 19. The method of claim 18,
Wherein the outlet pipe has a plurality of openings formed in a pipe wall of the collecting pipe and disposed in an axial direction, the end of the heat exchange pipe having a stepped portion and inserted into the opening, at least a part of the stepped portion of the heat- And the peripheral portion of the opening is contacted. 19. The method of claim 18,
Wherein the coolant inlet chamber and the coolant distribution chamber are separated by a partition wall portion and are in fluid communication with one another through holes in the partition wall portion, at least one of the holes being provided between two adjacent heat exchange tubes.

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