CN216205504U

CN216205504U - Heat exchange tube and heat exchanger

Info

Publication number: CN216205504U
Application number: CN202122406703.2U
Authority: CN
Inventors: 朱新华; 左景棉; 黄正华
Original assignee: Guangzhou Arlcho Refrigeration Equipment Co ltd
Current assignee: Guangzhou Arlcho Refrigeration Equipment Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-05
Anticipated expiration: 2031-09-30

Abstract

The utility model aims to provide a heat exchange tube, which comprises a plurality of transverse heat exchange tube sections which are arranged up and down for spraying water to arrange to form a water film, wherein at least two heat exchange tube sections which are adjacent up and down are closely arranged up and down for spraying water to arrange to form a continuous water film, and a connecting section which connects the two heat exchange tube sections in series, and is characterized in that: the heat exchange tube sections are arranged in at least two rows, and the heat exchange tube sections in each row are transversely arranged side by side; wherein at least one connecting section spans from one heat exchange tube section of one row to one heat exchange tube section of the other row, thereby connecting the two heat exchange tube sections which belong to the two rows in series. The heat exchange tube of the utility model adopts different technical concepts, and one heat exchange tube section in one row is spanned to one heat exchange tube section in the other row, so that the two heat exchange tube sections belonging to the two rows are connected in series.

Description

Heat exchange tube and heat exchanger

Technical Field

The utility model relates to a heat exchanger, in particular to a heat exchanger and a heat exchange tube of the heat exchanger.

Background

Patent document CN105466246B discloses that a heat exchange tube of a heat exchanger has multiple layers of heat exchange tube sections, the multiple layers of heat exchange tube sections are closely arranged up and down in a manner that the distance between the adjacent heat exchange tube sections is 1-3 mm to form a continuous water film, generally, it is considered that the preferred method is to have the same diameter between the bent tube section and the heat exchange tube section, set a first bent tube section to connect the right ends of the top layer heat exchange tube section and the second layer heat exchange tube section, set a second bent tube section to connect the left ends of the second layer heat exchange tube section and the third layer heat exchange tube section, and continue to set more bent tube sections in this manner until the two ends of the heat exchange tube sections are connected. However, because the bent pipe sections are vertically arranged according to the arrangement of the heat exchange pipe sections, each bent pipe section can only occupy the height of two layers of heat exchange pipe sections at most, so that the head section and the tail section of each bent pipe section can be smoothly bent only by being tightly arranged like the heat exchange pipe sections under the condition that the diameter of each bent pipe section is equal to that of the heat exchange pipe sections, which means that the bent pipe sections are bent for 180 degrees in a very narrow space, and the manufacturing difficulty is very high. The bend section can only be changed to have a smaller radius than the heat exchange tube section by the technical means disclosed in the above patent documents, but this creates a new problem: 1. the small diameter bend section causes large water resistance due to small radius. 2. The small-diameter bent pipe sections are arranged on the heat exchange pipe section in a welding mode, so that the heat exchange pipe generates a plurality of welding points, and the heat exchange efficiency of the heat exchange pipe is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a heat exchange tube with different technical concepts.

The heat exchange tube comprises a plurality of transverse heat exchange tube sections which are arranged up and down to form a water film for spray water arrangement, wherein at least two heat exchange tube sections which are adjacent up and down are closely arranged up and down to form a continuous water film for spray water arrangement, and the heat exchange tube also comprises a connecting section which connects the two heat exchange tube sections in series, wherein the plurality of heat exchange tube sections are at least two rows, and the heat exchange tube sections in each row are arranged side by side transversely; wherein at least one connecting section spans from one heat exchange tube section of one row to one heat exchange tube section of the other row, thereby connecting the two heat exchange tube sections which belong to the two rows in series.

Further, all the heat exchange tube sections in the same row are closely arranged up and down.

Further, the heat exchange tube is a coil and is coiled to form two rows of the plurality of heat exchange tube sections and connecting sections which are transversely arranged side by side, specifically, the first end of one heat exchange tube section in the first row is turned to cross the first end of one heat exchange tube section in the second row through the first end connecting section, and the second end of the heat exchange tube section in the second row is turned to cross the second end of the next heat exchange tube section in the first row through the second end connecting section, so that the plurality of heat exchange tube sections and the connecting sections which are transversely arranged side by side are formed by circularly coiling.

Further, the structure of the heat exchange tube comprises one of the following (a) and (b): (i) said one heat exchange tube section of the first row and said subsequent heat exchange tube section of the first row are both horizontal, the heat exchange tube section of the second row is sloped with a first end equal to said one heat exchange tube section of the first row and a second end equal to said subsequent heat exchange tube section of the first row, and accordingly the first end connection section and the second end connection section are horizontally disposed; (ii) said one heat exchange tube segment of the first row, said subsequent heat exchange tube segment of the first row, said one heat exchange tube segment of the second row are all horizontal; the first end connecting section is obliquely arranged, the connecting end of the first end connecting section, which is connected with the heat exchange tube section in the first row, is equal to the heat exchange tube section, the connecting end of the first end connecting section, which is connected with the heat exchange tube section in the second row, is equal to the heat exchange tube section, the connecting end of the second end connecting section, which is connected with the heat exchange tube section in the second row, is equal to the heat exchange tube section, and the connecting end of the second end connecting section, which is connected with the next heat exchange tube section in the first row, is equal to the heat exchange tube section.

Further, all the connecting sections and/or the heat exchange tube sections are circular or oval in cross section, and the oval is larger in height than in width.

Furthermore, the heat exchange tube is formed by coiling one tube.

Furthermore, the distance between two heat exchange pipe sections which are adjacent up and down in the middle of the heat exchange pipe section in the same row is 1-3 mm, and/or the distance between two connecting sections which are adjacent up and down in the middle of the connecting section in the same row is 3-5 mm.

Further, including carrying out vertical spacing stop device to whole row of connecting pipe section.

Further, the heat exchange tube is a condensation tube used for an evaporative condensation system.

The heat exchanger comprises a spraying mechanism and a heat exchange tube, wherein the spraying mechanism sprays water to the heat exchange tube above the heat exchange tube, and the spraying mechanism specifically sprays water to the heat exchange tube section.

Further, the spraying mechanism comprises at least two horizontal spraying straight pipes; and each straight spray pipe is respectively arranged right above each row of heat exchange pipe sections and is respectively aligned with each row of heat exchange pipe sections for water spraying.

Furthermore, the spraying mechanism further comprises a connection pipe, two ends of the connection pipe are respectively connected with the two horizontal spraying straight pipes and are positioned right above the connecting section, and the bottom of the connection pipe is provided with a spraying hole for spraying water to the connecting section.

Further, the heat exchanger is a condenser for an evaporative condensing system.

Further, the heat exchange pipes are provided with a plurality of rows, and the spray pipes are correspondingly provided with a plurality of rows.

The conventional thought of the prior art is that the connecting section is vertical, and the connecting section is vertically connected with two heat exchange tube sections which are adjacent up and down.

Drawings

FIG. 1 is a perspective view of a heat exchanger looking at an angle to the right;

FIG. 2 is a top view of rows of heat exchange tubes;

FIG. 3 is a perspective view of a heat exchange tube from a right perspective to a positive perspective;

FIG. 4 is a front view of the heat exchanger (with the housing, inlet manifold, outlet manifold hidden);

FIG. 5 is a schematic illustration of a cross-section of a first bank of header heat exchange tube segments;

FIG. 6 is a perspective view of a heat exchange tube;

FIG. 7 is a perspective view of a non-preferred heat exchange tube;

FIG. 8 is a perspective view of a non-preferred heat exchanger;

FIG. 9 is a perspective view of another preferred heat exchange tube;

in the figure: 1. a spraying mechanism; 2. a condensing mechanism; 3. a filler; 4. a main water pipe; 5. an air inlet exhaust pipe; 6. a liquid outlet pipe; 7. a condenser tube; 10. a first bank of first heat exchange tube sections; 11. a first end connection section; 12. a second row of first heat exchange tube sections; 13. a fixing strip; 14. a second end connection section; 15. the right end of the first row of first heat exchange pipe sections; 16. the right end of the second row of first heat exchange pipe sections; 17. the left end of the second row of first heat exchange tube sections; 18. the left end of the first row of secondary heat exchange tube sections; 20. a first spray straight pipe; 21. a second straight spray pipe; 22. an intake manifold; 23. a liquid outlet main pipe; 24. a first row of secondary heat exchange tube sections; 25. connecting pipes; 30. a first heat exchange straight pipe; 31. a first curved connecting section; 32. a second heat exchange straight pipe; 33. a second curved connecting section; 34. a third heat exchange straight pipe; 35. a third curved connecting section; 36. a fourth heat exchange straight pipe; 37. a fourth curved connecting section.

Detailed Description

The utility model is described in further detail below with reference to specific embodiments.

The heat exchanger is a condenser used for a central air-conditioning system, a single condenser pipe of the condenser is used as a heat exchange pipe and is formed by spirally winding a round pipe with the same diameter everywhere, welding spots are few, and the volume of the condenser pipe is reduced. As shown in fig. 6, the coil extends horizontally from the top to the right to form a horizontal first row of first heat exchange tube segments 10, the right ends 15 of the first row of first heat exchange tube segments are horizontally turned to form a horizontal first end connection segment 11 and then extend obliquely left and downward to form an inclined second row of first heat exchange tube segments 12, and the right ends 16 of the second row of first heat exchange tube segments are equal to the height of the first row of first heat exchange tube segments 10; then the left end 17 of the second row of first heat exchange tube sections horizontally turns to form a horizontal second end connecting section 14, then horizontally extends rightwards under the first row of first heat exchange tube sections 10 to form a first row of secondary heat exchange tube sections 24 closely arranged at a distance of 2mm (1-3 mm) from the first row of first heat exchange tube sections 10, the first row of secondary heat exchange tube sections 24 are equal to the left end 17 of the second row of first heat exchange tube sections, and two rows of heat exchange tube sections and connecting sections which are transversely arranged side by side are formed by circularly coiling. The first end connecting sections 11 are arranged up and down, and the distance between two first end connecting sections 11 which are adjacent up and down in the same row of first end connecting sections 11 is 4mm (can be 3-5 mm); the second end connecting segments are arranged in a first end connecting segment manner, and the first end connecting segment 11 and the second end connecting segment 12 are both arc-shaped. As shown in fig. 3, two fixing strips 13 are provided as a limiting device for vertically limiting the whole row of the first end connecting section 11 and the second end connecting section 14. As shown in fig. 5, both the first row of first heat exchange tube sections 10 and the second row of first heat exchange tube sections 12 are compressed into flat tubes (or may not be compressed, and are continuously coiled with round tubes), and the cross-sectional height of the flat tubes is greater than the width. The first and second

end connecting sections

11 and 14 may be wound with flat tubes instead.

As shown in fig. 2 and 3, the plurality of condensation pipes 7 are arranged in a horizontal direction, an air inlet manifold 22 and a liquid outlet manifold 23 are arranged in front of the condensation pipes 7 and connected to each condensation pipe 7, an air inlet calandria 5 is arranged on the air inlet manifold 22, and a liquid outlet calandria 6 (the liquid outlet calandria 6 is not shown in the figure, see fig. 4) is arranged on the liquid outlet manifold 23, and these components jointly constitute the condensation mechanism 2. As shown in fig. 1, a spraying mechanism 1 is arranged above the condensing mechanism 2 and a filler 3 is arranged below the condensing mechanism, the spraying mechanism 1 comprises a main water pipe 4, as shown in fig. 4, a plurality of spraying straight pipes which are transversely arranged side by side are arranged below the main water pipe 4, the spraying straight pipes are respectively connected with the main water pipe 4, taking a first spraying straight pipe 20 and a second spraying straight pipe 21 as examples, the first spraying straight pipe 20 is transversely arranged right above a first row of first heat exchange pipe sections 10 of one condensing pipe 7 and is aligned with the first heat exchange pipe section 10, the second spraying straight pipe 21 is transversely arranged right above a second row of first heat exchange pipe sections 12 of the same condensing pipe 7 and is aligned with the second first heat exchange pipe section 12, and spraying holes are formed at the bottoms of the two spraying

straight pipes

20 and 21. Referring to fig. 2 to 4, the working process is as follows: gaseous high-temperature refrigerant enters a condenser pipe 7 through an air inlet pipe 5, a main water pipe 4 carries out refrigeration in a water spraying cooling condenser pipe 7 through a first row of first heat exchange pipe sections 10 and a second row of first heat exchange pipe sections 12 through a first spraying straight pipe 20 and a second spraying straight pipe 21 respectively, all the heat exchange pipe sections in the same row of the condenser pipe 7 are arranged up and down tightly, so that spraying water is arranged on the outer side wall of each row of heat exchange pipe sections to form continuous water films, the continuous water films and the heat exchange pipe sections carry out efficient heat exchange to quickly take away the heat of the refrigeration in the condenser pipe 7, the cooled refrigerant is changed into liquid and flows out of a liquid outlet pipe 6, part of spraying water absorbs the heat of the refrigerant to generate hot steam, the hot steam is forcibly discharged out of the condenser by a condensing fan, and the spraying water which is not changed into the hot steam flows down into a filler 3 from the outer side wall of the condenser pipe 7 to be cooled by air flow.

The following non-preferred schemes can be changed on the basis of FIG. 6: the single condensation pipe 7 is formed by splicing a first row of heat exchange pipe sections 10 and a second row of heat exchange pipe sections 12 which are transversely arranged and corresponding connecting sections, namely: the right end of the first row of first heat exchange pipe sections 10 is used as a first end, the first end connecting section 11 turns to a right end 16 which is connected with the second row of first heat exchange pipe sections in a crossing mode and is used as a first end, the left end 17 of the second row of first heat exchange pipe sections is used as a second end, the second end connecting section 14 turns to a left end 18 which is connected with the first row of secondary heat exchange pipe sections 24 in a crossing mode and is used as a second end, and the second end connecting section 14 horizontally connects the two heat exchange pipe sections which belong to the two rows in a serial connection mode so as to form two rows of heat exchange pipe sections and connecting sections which are transversely arranged side by side in a circulating mode.

Preferably, as shown in fig. 7, the single condensation pipe 7 may be changed into four rows, the coil pipe laterally extends to the right to form a first heat exchange straight pipe 30, and laterally turns to form a first curved connection section 31, and then laterally extends to the left to form a second heat exchange straight pipe 32, and laterally turns to form a second curved connection section 33, and then laterally extends to the right to form a third heat exchange straight pipe 34, and laterally turns to form a third curved connection section 35, and then laterally extends to the left and downwards to form a fourth heat exchange straight pipe 36, and then laterally turns to a position right below the left end of the first heat exchange straight pipe 30 to form a fourth curved connection section 37, so that four rows of a plurality of heat exchange pipe sections and connection sections which are laterally arranged side by side are circularly coiled.

Unpreferably, as shown in fig. 8, the first and second

straight spray pipes

20 and 21 are changed into horizontal annular pipes, each annular pipe includes two

straight pipes

20 and 21 and two arc-shaped connection pipes 25, the two

straight pipes

20 and 21 are respectively arranged right above the first row of first heat exchange pipe sections 10 and the second row of first heat exchange pipe sections 12 of the same condenser pipe 7, and the bottoms of the two straight pipes are respectively provided with spray holes for spraying water; the two connection pipes 25 are respectively arranged right above the first end connecting section 11 and the second end connecting section 14, and the bottoms of the two connection pipes are respectively provided with a spraying hole for spraying water.

The condenser tube 7 according to the present invention may be used in a closed cooling tower.

On the basis of fig. 6, as shown in fig. 9, the heat exchange tube segments may be changed to be horizontal, the first end connecting segment is obliquely arranged, the second end connecting segment is horizontally arranged, the connecting end of the first end connecting segment connected with the one heat exchange tube segment in the first row is higher than the heat exchange tube segment, the connecting end of the first end connecting segment connected with the one heat exchange tube segment in the second row is higher than the heat exchange tube segment, the connecting end of the second end connecting segment connected with the one heat exchange tube segment in the second row is higher than the heat exchange tube segment, and the connecting end of the second end connecting segment connected with the subsequent heat exchange tube segment in the first row is higher than the heat exchange tube segment.

The above description is only the embodiments of the present invention, and the scope of protection is not limited thereto. The insubstantial changes or substitutions will now be made by those skilled in the art based on the teachings of the present invention, which fall within the scope of the claims.

Claims

1. The heat exchange tube comprises a plurality of transverse heat exchange tube sections which are vertically arranged for spraying water to arrange and form a water film, wherein at least two heat exchange tube sections which are vertically adjacent are vertically and closely arranged for spraying water to arrange and form a continuous water film, and the heat exchange tube further comprises a connecting section for connecting the two heat exchange tube sections in series, and is characterized in that: the heat exchange tube sections are arranged in at least two rows, and the heat exchange tube sections in each row are transversely arranged side by side; wherein at least one connecting section spans from one heat exchange tube section of one row to one heat exchange tube section of the other row, thereby connecting the two heat exchange tube sections which belong to the two rows in series.

2. The heat exchange tube of claim 1, wherein: all the heat exchange pipe sections in the same row are closely arranged up and down.

3. The heat exchange tube of claim 2, wherein: the heat exchange tube is a coil and is coiled to form two rows of the plurality of heat exchange tube sections and the connecting sections which are transversely arranged side by side, specifically, the first end of one heat exchange tube section in the first row is turned to cross the first end of one heat exchange tube section in the second row through the first end connecting section, and the second end of the heat exchange tube section in the second row is turned to cross the second end of the next heat exchange tube section in the first row through the second end connecting section, so that the two rows of the plurality of heat exchange tube sections and the connecting sections which are transversely arranged side by side are formed by circularly coiling.

4. A heat exchange tube according to claim 3, wherein the structure of the heat exchange tube comprises one of the following (a) and (b):

(i) said one heat exchange tube section of the first row and said subsequent heat exchange tube section of the first row are both horizontal, the heat exchange tube section of the second row is sloped with a first end equal to said one heat exchange tube section of the first row and a second end equal to said subsequent heat exchange tube section of the first row, and accordingly the first end connection section and the second end connection section are horizontally disposed;

(ii) said one heat exchange tube segment of the first row, said subsequent heat exchange tube segment of the first row, said one heat exchange tube segment of the second row are all horizontal; the first end connecting section is obliquely arranged, the connecting end of the first end connecting section, which is connected with the heat exchange tube section in the first row, is equal to the heat exchange tube section, the connecting end of the first end connecting section, which is connected with the heat exchange tube section in the second row, is equal to the heat exchange tube section, the connecting end of the second end connecting section, which is connected with the heat exchange tube section in the second row, is equal to the heat exchange tube section, and the connecting end of the second end connecting section, which is connected with the next heat exchange tube section in the first row, is equal to the heat exchange tube section.

5. The heat exchange tube of claim 1, wherein: all the connecting sections and/or the heat exchange tube sections are circular or oval in cross section, and the oval is larger than wide.

6. The heat exchange tube of claim 3 or 5, wherein: the heat exchange tube is formed by coiling one tube.

7. The heat exchange tube of claim 3 or 5, wherein: two adjacent heat exchange tube sections from top to bottom in the middle of the heat exchange tube section of the same row are 1-3 mm apart, and/or two adjacent connecting sections from top to bottom in the middle of the connecting section of the same row are 3-5 mm apart.

8. The heat exchange tube of claim 1, wherein: including carrying out vertical spacing stop device to whole row of connecting pipe section.

9. The heat exchange tube of claim 1, wherein: the heat exchange tube is a condensation tube used for an evaporative condensation system.

10. The heat exchanger, including spraying mechanism and heat exchange tube, spray the mechanism and toward heat exchange tube trickle above the heat exchange tube, its characterized in that: the heat exchange tube according to any one of claims 1 to 9, wherein the spraying mechanism is used for spraying water to the heat exchange tube section.

11. The heat exchanger of claim 10, wherein: the spraying mechanism comprises at least two horizontal spraying straight pipes; and each straight spray pipe is respectively arranged right above each row of heat exchange pipe sections and is respectively aligned with each row of heat exchange pipe sections for water spraying.

12. The heat exchanger of claim 10, wherein: the spraying mechanism further comprises a connection pipe, two ends of the connection pipe are respectively connected with the two transverse spraying straight pipes, the connection pipe is located right above the connection section, and the bottom of the connection pipe is provided with a spraying hole for spraying water to the connection section.

13. The heat exchanger of claim 10, wherein: the heat exchanger is a condenser used for an evaporative condensing system.

14. The heat exchanger of claim 10, wherein: the heat exchange tubes are provided with a plurality of rows, and the spraying mechanism is correspondingly provided with a plurality of rows.