CN215063891U

CN215063891U - Coiled tube type heat exchanger and refrigerating system

Info

Publication number: CN215063891U
Application number: CN202120365797.0U
Authority: CN
Inventors: 周晓晓; 冯国艳; 钟建法; 史俊茹
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-12-07
Anticipated expiration: 2031-02-09

Abstract

The utility model relates to a refrigeration technology field especially relates to around tubular heat exchanger and refrigerating system. A wound tube type heat exchanger comprises a barrel assembly, a central tube and a plurality of heat exchange tubes, wherein a shell cavity for accommodating shell pass media is formed in the barrel assembly, the central tube is arranged in the shell cavity, and the heat exchange tubes surround the central tube in a layered mode and are spiral; the tube side heat exchanger is characterized in that at least two groups of tube side interfaces are arranged on the barrel assembly, each group of tube side interfaces comprises a tube side inlet and a tube side outlet, and the tube side outlets of the at least two groups of tube side interfaces are respectively close to two ends of the wound tube type heat exchanger. The utility model has the advantages that: the length of the pipeline between the tube pass outlet and the compressor can be shortened, the cost is saved, and the performance of the refrigerating system can be improved.

Description

Coiled tube type heat exchanger and refrigerating system

Technical Field

The utility model relates to a refrigeration technology field especially relates to around tubular heat exchanger and refrigerating system.

Background

The heat exchanger is arranged in the refrigerating system and used for carrying out heat exchange, and shell-and-tube heat exchangers in the field of module machines all adopt shell-and-tube heat exchangers. Some central air-conditioning modules are multi-system, and the multi-system modules are provided with a plurality of compressors which are respectively arranged at two ends of the shell-and-tube heat exchanger. The wound tube type heat exchanger has the characteristics of compact design, small occupied area and good heat exchange effect, and some modules can select the wound tube type heat exchanger to replace a shell and tube type heat exchanger.

In the existing shell-and-tube heat exchanger, tube pass outlets of a plurality of groups of tube pass interfaces are often arranged at the same end of the heat exchanger, so that one tube pass outlet needs to be connected with a compressor through a longer pipeline, the cost is increased, and the performance of a refrigeration system is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a around tubular heat exchanger, technical scheme is as follows:

a wound tube type heat exchanger comprises a barrel assembly, a central tube and a plurality of heat exchange tubes, wherein a shell cavity for accommodating shell pass media is formed in the barrel assembly, the central tube is arranged in the shell cavity, and the heat exchange tubes surround the central tube in a layered mode and are spiral; the tube side heat exchanger is characterized in that at least two groups of tube side interfaces are arranged on the barrel assembly, each group of tube side interfaces comprises a tube side inlet and a tube side outlet, and the tube side outlets of the at least two groups of tube side interfaces are respectively arranged at two ends of the wound tube type heat exchanger.

So set up, can shorten the length of the pipeline between tube side export and the compressor, save the cost, and can improve refrigerating system's performance.

In one embodiment, the tube side outlets and the tube side inlets of the tube side interfaces in the same group are respectively arranged at two ends of the coiled tube type heat exchanger.

The structure is suitable for the structure of a refrigerating system, in particular for the structure of a central air-conditioning module machine with multiple systems.

In one embodiment, the barrel assembly comprises a barrel, a first sealing cover and a second sealing cover, the first sealing cover and the second sealing cover are respectively arranged at two ends of the barrel in a covering mode, and the tube side interface is arranged on the first sealing cover and/or the second sealing cover.

In one embodiment, a first shell-side connection pipe is arranged on the first sealing cover, a second shell-side connection pipe is arranged on the second sealing cover, the tube-side outlet, the tube-side inlet and the first shell-side connection pipe on the first sealing cover are uniformly distributed along the circumferential direction of the first sealing cover, and the tube-side outlet, the tube-side inlet and the second shell-side connection pipe on the second sealing cover are uniformly distributed along the circumferential direction of the second sealing cover.

In one embodiment, a first liquid dividing assembly is arranged in the tube side inlet and connected to the inlet of the heat exchange tube.

The arrangement is such that the tube side medium is uniformly distributed to each heat exchange tube.

In one embodiment, the first liquid separation assembly comprises a first tube plate, the first tube plate is arranged in the tube side inlet and is provided with a plurality of first fixing holes, and the inlet of the heat exchange tube is expanded and connected in the first fixing holes.

In one embodiment, the first liquid distribution assembly comprises a first distributor, a plurality of first distribution holes are formed in the first distributor, and the inlet of the heat exchange tube is connected with the first distribution holes in a welding mode.

In one embodiment, the spiral directions of the heat exchange tubes of every two adjacent layers are opposite.

By the arrangement, the turbulence of shell side media between the heat exchange tubes can be enhanced, and heat exchange is enhanced.

In one embodiment, a gas collection assembly is arranged in the tube side outlet and connected to the outlet of the heat exchange tube.

By the arrangement, the tube pass media flowing out of the heat exchange tubes can be gathered and flow into the pipeline of the refrigeration system.

The utility model discloses still provide following technical scheme:

a refrigeration system comprises the coiled heat exchanger.

Compared with the prior art, the utility model provides a around tubular heat exchanger through setting up at least two sets of tube side export respectively in the both ends around tubular heat exchanger, can be connected with the compressor that is located both ends for every tube side export all is close to the compressor setting, can shorten the connecting line of tube side export and compressor, saves the cost.

Drawings

FIG. 1 is a partial cross-sectional view of a coiled heat exchanger according to one embodiment of the present invention;

FIG. 2 is a schematic view of a portion of a coiled heat exchanger according to another embodiment;

FIG. 3 is a first schematic structural diagram of a wound tube heat exchanger;

FIG. 4 is a second schematic structural view of a coiled heat exchanger;

fig. 5 is a left side view of the coiled heat exchanger.

The symbols in the drawings represent the following meanings:

100. a coiled heat exchanger; 101. a first end; 102. a second end; 103. a tube side interface; 10. a cartridge assembly; 11. a shell cavity; 12. a first shell-side adapter tube; 13. a second shell side connection pipe; 14. a barrel; 15. a first cover; 16. a second cover; 17. a tube side inlet; 18. a tube side outlet; 20. a central barrel; 30. a heat exchange pipe; 40. a first liquid-separating assembly; 41. a first distributor; 42. a first tube sheet; 421. a first fixing hole; 50. a gas collection assembly; 51. a gas collecting head; 52. a second tube sheet; 521. and a second fixing hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, the present invention provides a coiled heat exchanger 100, wherein the coiled heat exchanger 100 is installed in a refrigeration system for heat exchange.

Referring to fig. 1, the wound tube heat exchanger 100 includes a tube assembly 10, a central tube 20 and a plurality of heat exchange tubes 30, the tube assembly 10 has a shell cavity 11 therein, the heat exchange tubes 30 spirally and hierarchically surround the outer side of the central tube 20, and the central tube 20 and the heat exchange tubes 30 are disposed in the shell cavity 11.

Specifically, the barrel assembly 10 includes a barrel 14, a first cover 15 and a second cover 16, the first cover 15 and the second cover 16 are respectively disposed at two ends of the barrel 14, and the first cover 15, the second cover 16 and the barrel 14 enclose a shell cavity 11.

The wound tube heat exchanger 100 has a first end 101 and a second end 102 which are arranged oppositely, a first shell-side connecting tube 12 and a second shell-side connecting tube 13 are arranged on the cylinder assembly 10, the first shell-side connecting tube 12 and the second shell-side connecting tube 13 are both communicated with the shell cavity 11, the first shell-side connecting tube 12 is arranged at the first end 101, the second shell-side connecting tube 13 is arranged at the second end 102, a shell-side medium flows into the shell cavity 11 from the first shell-side connecting tube 12 and flows out of the second shell-side connecting tube 13 after exchanging heat with a tube-side medium in the heat exchange tube 30, or the shell-side medium flows in from the second shell-side connecting tube 13 and flows out of the first shell-side connecting tube 12. In this embodiment, the first shell-side connection tube 12 and the second shell-side connection tube 13 are respectively disposed on the first sealing cover 15 and the second sealing cover 16, and in other embodiments, the first shell-side connection tube 12 and the second shell-side connection tube 13 may also be disposed on the cylinder 14.

The barrel assembly 10 is provided with a plurality of sets of tube pass interfaces 103, each set of tube pass interface 103 comprises a tube pass inlet 17 and a tube pass outlet 18, and the tube pass outlets 18 of at least two sets of tube pass interfaces 103 are respectively arranged at two ends of the tubular heat exchanger 100. It can be understood that when the refrigeration system is a multi-system, the number of the compressors is multiple, and the multiple compressors are distributed at two ends of the coiled heat exchanger 100, so that the connecting pipeline between the tube pass outlet 18 and the compressors can be shortened, the cost can be reduced, and the performance of the refrigeration system can be improved.

The tube pass outlet 18 and the tube pass inlet 17 of the tube pass interface 103 in the same group are respectively arranged at two ends of the coiled tube heat exchanger 100 to adapt to the structure of a multi-system refrigeration system.

Referring to fig. 5, the tube-side outlet 18, the tube-side inlet 17, and the first shell-side adapter 12 on the first cover 15 are uniformly distributed along the circumferential direction of the first cover 15, and the tube-side outlet 18, the tube-side inlet 17, and the second shell-side adapter 13 on the second cover 16 are uniformly distributed along the circumferential direction of the second cover 16.

Referring to fig. 3 to 5, the included angle θ between the axis of the tube-side outlet 18 and the axis of the tube-side inlet 17 and the central axis of the central cylinder 20 is 45 °, if the included angle θ is too small, interference occurs when the first liquid distribution assembly 40 and the gas collection assembly 50, which are described below, are disposed in the tube-side outlet 18 and the tube-side inlet 17, or interference occurs with the first shell-side connection pipe 12 and the second shell-side connection pipe 13, and if the included angle θ is too large, a part of the first liquid distribution assembly 40 and the gas collection assembly 50 contacts the cylinder 14, which causes inconvenience in installation.

The heat exchange tubes 30 of adjacent layers are arranged at intervals, the gaps between the heat exchange tubes 30 of adjacent layers are 1 mm-4 mm along the radial direction of the central cylinder 20, and the gaps between the adjacent layers are used for allowing a shell side medium to flow, so that the tube side medium and the shell side medium can exchange heat fully. It can be understood that if the gaps of the heat exchange tubes 30 in the adjacent layers are too small, the shell-side medium cannot flow, or the flow velocity of the shell-side medium is too fast to increase the flow resistance, and if the gaps of the heat exchange tubes 30 in the adjacent layers are too large, the flow velocity of the shell-side medium is reduced, which affects the heat exchange coefficient. The gap between the adjacent heat exchange tubes 30 can be any value of 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm or 1 mm-4 mm. It should be noted that, in this embodiment, the tube-side medium may be a refrigerant, and the shell-side medium may be water, and according to the different properties of the media, a suitable medium is selected to pass through the tube side, and another medium passes through the shell side.

Further, the spiral directions of the adjacent heat exchange tubes 30 are opposite, so that the turbulence degree of shell-side media among the heat exchange tubes 30 can be enhanced, the heat exchange is enhanced, and the heat exchange efficiency is improved.

A wrapping cylinder (not shown) is arranged between the outermost heat exchange tube 30 and the inner wall of the cylinder 14, the wrapping cylinder is wound outside the outermost heat exchange tube 30 and is fixed on the inner wall of the cylinder 14, the wrapping cylinder plays a role in guiding flow, and shell pass media are prevented from directly flowing to the other end of the cylinder 14 from the position between the outermost heat exchange tube 30 and the inner wall of the shell cavity 11, so that the heat exchange effect is influenced, friction between the inner wall of the cylinder 14 and the heat exchange tube 30 is prevented, and the heat exchange tube 30 is prevented from being broken by friction to generate leakage.

The inner wall of the heat exchange tube 30 is provided with threads (not shown) to increase the heat exchange area of the heat exchange tube 30.

Each layer of heat exchange tube 30 comprises a plurality of heat exchange tubes 30, and the plurality of heat exchange tubes 30 in the same layer are surrounded into a cylinder shape.

A first liquid dividing component 40 is arranged in the tube side inlet 17, the first liquid dividing component 40 is connected with the inlet of the heat exchange tube 30, and the first liquid dividing component 40 is used for uniformly distributing a tube side medium to each heat exchange tube 30.

In the present embodiment, a gas collecting assembly 50 is disposed in the tube side outlet 18, the gas collecting assembly 50 is connected to the outlets of the heat exchange tubes 30, and the gas collecting assembly 50 is used for collecting the tube side media flowing out of each heat exchange tube 30 and flowing into the pipeline of the refrigeration system. In other embodiments, the gas collection assembly 50 may not be provided.

Referring to fig. 1, in one embodiment, the first liquid distribution assembly 40 and the gas collection assembly 50 respectively include a first distributor 41 and a gas collection head 51, the first distributor 41 and the gas collection head 51 are respectively provided with a plurality of distribution holes (not shown), an inlet of the heat exchange tube 30 is welded at the distribution hole of the first distributor 41, and an outlet of the heat exchange tube 30 is welded at the distribution hole of the gas collection head 51.

Referring to fig. 2, in another embodiment, the first liquid dividing assembly 40 and the gas collecting head 51 respectively include a first tube plate 42 and a second tube plate 52, the first tube plate 42 is disposed in the tube side inlet 17 and is provided with a plurality of first fixing holes 421, the second tube plate 52 is disposed in the tube side outlet 18 and is provided with a plurality of second fixing holes 521, the inlet of the heat exchange tube 30 is expanded and connected in the first fixing holes 421, and the outlet of the heat exchange tube 30 is expanded and connected in the second fixing holes 521. In other embodiments, the first liquid distribution assembly 40 may be a liquid distribution header or other distributor, and the gas collection assembly 50 may be a tube sheet or may not be provided with the gas collection assembly 50.

The utility model also provides a refrigerating system, including above-mentioned around tubular heat exchanger 100.

During operation, the tube-side outlet 18 at the first end 101 is connected to the compressor adjacent thereto, and the tube-side outlet 18 at the second end 102 is connected to the compressor adjacent thereto. Media simultaneously enter from each group of tube pass inlets 17, are subjected to liquid separation through the first liquid separation assembly 40, uniformly enter the heat exchange tubes 30, exchange heat with shell pass media, flow to the other end of the coiled tube heat exchanger 100 and flow out from the tube pass outlet 18 to the corresponding compressor; the shell-side medium flows in from the first shell-side connecting pipe 12, flows into the shell cavity 11, flows into the gaps of the heat exchange pipes 30 of each layer, exchanges heat with the tube-side medium, and flows out from the second shell-side connecting pipe 13.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A wound tube type heat exchanger comprises a tube body assembly (10), a central tube (20) and a plurality of heat exchange tubes (30), wherein a shell cavity (11) for accommodating shell side media is formed in the tube body assembly (10), the central tube (20) is arranged in the shell cavity (11), and the plurality of heat exchange tubes (30) surround the central tube (20) in a layered mode and are spiral;

the heat exchanger is characterized in that at least two groups of tube pass interfaces (103) are arranged on the barrel component (10), each group of tube pass interfaces (103) comprises a tube pass inlet (17) and a tube pass outlet (18), and the tube pass outlets (18) of the at least two groups of tube pass interfaces (103) are respectively arranged at two ends of the wound tube heat exchanger.

2. The coiled heat exchanger according to claim 1, wherein the tube side outlets (18) and the tube side inlets (17) of the tube side interfaces (103) of the same group are respectively arranged at two ends of the coiled heat exchanger.

3. The coiled heat exchanger according to claim 1, wherein the cylinder assembly (10) comprises a cylinder (14), a first cover (15) and a second cover (16), the first cover (15) and the second cover (16) are respectively disposed at two ends of the cylinder (14), and the tube-side interface (103) is disposed on the first cover (15) and/or the second cover (16).

4. The coiled heat exchanger according to claim 3, wherein a first shell-side connection pipe (12) is arranged on the first cover (15), a second shell-side connection pipe (13) is arranged on the second cover (16), the tube-side outlet (18), the tube-side inlet (17) and the first shell-side connection pipe (12) on the first cover (15) are uniformly distributed along the circumferential direction of the first cover (15), and the tube-side outlet (18), the tube-side inlet (17) and the second shell-side connection pipe (13) on the second cover (16) are uniformly distributed along the circumferential direction of the second cover (16).

5. The coiled heat exchanger according to claim 1, wherein a first liquid-dividing assembly (40) is arranged in the tube side inlet (17), and the first liquid-dividing assembly (40) is connected to the inlet of the heat exchange tube (30).

6. The coiled heat exchanger according to claim 5, wherein the first liquid-separating assembly (40) comprises a first tube plate (42), the first tube plate (42) is disposed in the tube-side inlet (17) and defines a plurality of first fixing holes (421), and the inlet of the heat exchange tube (30) is expanded in the first fixing holes (421).

7. The coiled heat exchanger according to claim 5, wherein the first liquid distribution assembly (40) comprises a first distributor (41), the first distributor (41) is provided with a plurality of first distribution holes, and the inlet of the heat exchange tube (30) is welded to the first distribution holes.

8. A wound tube heat exchanger according to claim 1 wherein the heat exchange tubes (30) of each adjacent two layers have opposite helical directions.

9. The coiled heat exchanger according to claim 1, wherein a gas collection assembly (50) is disposed in the tube side outlet (18), and the gas collection assembly (50) is connected to the outlet of the heat exchange tube (30).

10. A refrigeration system comprising a coiled heat exchanger according to any of claims 1 to 9.