CN109141070B

CN109141070B - Hexagonal spiral channel compact heat exchanger

Info

Publication number: CN109141070B
Application number: CN201811080388.5A
Authority: CN
Inventors: 李育隆; 冯月; 吴宏
Original assignee: Beihang University
Current assignee: Beihang University
Priority date: 2018-09-17
Filing date: 2018-09-17
Publication date: 2020-07-28
Anticipated expiration: 2038-09-17
Also published as: CN109141070A

Abstract

The invention relates to a hexagonal spiral channel compact heat exchanger which comprises a cold fluid inner channel, a hot fluid inner channel, a cold fluid distribution cavity, a hot fluid distribution cavity, a cold fluid outer pipe and a hot fluid outer pipe. The method is characterized in that: the cold and hot fluid exchanges heat by a plurality of staggered regular triangular channels in the middle of the heat exchanger, and meanwhile, the heat exchange performance is improved by the torsion structure in the middle of the heat exchanger. The compact heat exchanger has simple and reliable structure and high heat exchange efficiency.

Description

Hexagonal spiral channel compact heat exchanger

Technical Field

The invention belongs to the technical field of heat exchange devices, and particularly relates to a high-efficiency compact heat exchanger.

Background

The heat exchanger is a device for transferring partial heat of hot fluid to cold fluid in a certain heat transfer mode, and is also called as a heat exchanger. Heat exchangers have found widespread use in industrial production and are of increasing importance due to the current world facing energy shortages. The heat exchanger is required to have good reliability, high efficiency and low cost.

The heat exchanger can be divided into a tube type, a plate type and a special type by a heat transfer surface structure. The tubular heat exchanger has the main characteristics of simple structure, low manufacturing cost and wide material selection range, but the heat exchange coefficient is not high, and the tubular heat exchanger is inconvenient to clean. The plate heat exchanger has the characteristics of high heat transfer strength, use flexibility and easiness in manufacturing and processing, but has low pressure bearing capacity, is easy to leak, and meanwhile, the operating temperature of the plate heat exchanger cannot be too high.

With the continuous development of theory and mechanical technology, a heat exchanger with good performance in all aspects is urgently needed. In order to solve the problems of low heat exchange efficiency and large volume of the conventional heat exchanger, the invention provides a hexagonal spiral channel compact heat exchanger, which has the advantage that the heat exchange performance is enhanced through a compact geometric design and a torsion structure, so that the heat exchanger has higher heat exchange efficiency and smaller volume compared with the conventional heat exchanger.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a hexagonal spiral channel compact heat exchanger, which solves the problems of large volume and low heat exchange efficiency of the conventional heat exchanger and provides a more efficient heat exchange mode for the heat exchanger.

(II) technical scheme

In order to solve the problems, the invention adopts the following technical scheme:

the utility model provides a compact heat exchanger of hexagonal spiral passageway, this heat exchanger includes cold fluid outer tube (1), cold fluid distribution chamber (2) that link to each other with cold fluid outer tube (1), cold fluid inner channel (5) that link to each other with cold fluid distribution chamber (2), cold fluid outlet (8) that link to each other with cold fluid inner channel (5), hot-fluid outer tube (6), hot-fluid distribution chamber (7) that link to each other with hot-fluid outer tube (6), hot fluid inner channel (4) that link to each other with hot-fluid distribution chamber (7), hot-fluid outlet (3) that link to each other with hot fluid inner channel (4), its characterized in that: the cold fluid inner channel and the hot fluid inner channel respectively comprise a spiral section and a diffusion section, the cold fluid inner channel (5) and the hot fluid inner channel (4) respectively comprise a plurality of small channels, and the small channels of the spiral sections of the cold fluid inner channel (5) and the hot fluid inner channel (4) are in regular triangle and are staggered, so that the spiral sections form a hexagonal spiral channel integrally; the diffusion section of the cold fluid inner channel (5) is positioned in the hot fluid distribution cavity (7), and the diffusion section of the hot fluid inner channel (4) is positioned in the cold fluid distribution cavity (2); in the hot fluid distribution chamber (7), the small channels of the diffuser section of the cold fluid inner channel (5) are changed into a circle from a triangle and the flow path is enlarged along the diffusion direction, and in the cold fluid distribution chamber (2), the small channels of the diffuser section of the hot fluid inner channel (4) are changed into a circle from a triangle and the flow path is enlarged along the diffusion direction; the spiral sections of the cold fluid inner channel and the hot fluid inner channel rotate for 360 degrees; the cold fluid outer pipe (1) and the hot fluid outer pipe (6) are arranged in different directions; the relation between the total heat exchange area A of the spiral section and the side length a of the regular triangle, the total channel number n of the regular triangle and the heat exchange length l of the spiral section is as follows:

the hexagonal spiral channel compact heat exchanger is a countercurrent double-channel heat exchanger.

(III) advantageous effects

The invention has the following beneficial effects:

1. the structure is simple and reliable; 2. the volume is compact; 3. the heat exchange efficiency is high.

Drawings

FIG. 1 is a general schematic of the heat exchanger of the present invention;

FIG. 2 is a front view of the heat exchanger of the present invention;

FIG. 3 is a cross-sectional view of the flow path in the middle of the heat exchanger of the present invention;

FIG. 4 is a cross-sectional view of the flow channel in the middle of the heat exchanger of the present invention;

in the figure: 1. a cold fluid outer tube; 2. a cold fluid distribution chamber; 3. a hot fluid outlet; 4. a thermal internal fluid channel; 5. a cold fluid internal channel; 6. a hot fluid outer tube; 7. a hot fluid distribution chamber; 8. cold fluid outlet

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings.

The material of the hexagonal spiral channel compact heat exchanger can be made of metal or nonmetal materials. The working process of the compact heat exchanger is as follows: the cold fluid gets into the heat exchanger from outer tube 1, gets into cold fluid inner channel 5 behind cold fluid distribution chamber 2, carries out heat exchange through heat exchanger middle part rotating part and hot fluid inner channel 4, then discharges from cold fluid export 8. Meanwhile, the hot fluid enters the heat exchanger from the hot fluid outer pipe 6, passes through the hot fluid distribution cavity 7 and then enters the hot fluid inner channel 4 to exchange heat with the cold fluid in the middle of the heat exchanger, and then is discharged from the hot fluid outlet 3. At this time, the cold and hot fluid completes heat exchange.

The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a compact heat exchanger of hexagonal spiral passageway, this heat exchanger includes cold fluid outer tube (1), cold fluid distribution chamber (2) that link to each other with cold fluid outer tube (1), cold fluid inner channel (5) that link to each other with cold fluid distribution chamber (2), cold fluid export (8) that link to each other with cold fluid inner channel (5), hot-fluid outer tube (6), hot-fluid distribution chamber (7) that link to each other with hot-fluid outer tube (6), hot fluid inner channel (4) that link to each other with hot-fluid distribution chamber (7), hot-fluid export (3) that link to each other with hot fluid inner channel (4), its characterized in that: the cold fluid inner channel (5) and the hot fluid inner channel (4) respectively comprise a spiral section and a diffusion section, the cold fluid inner channel (5) and the hot fluid inner channel (4) respectively comprise a plurality of small channels, and the small channels of the spiral sections of the cold fluid inner channel (5) and the hot fluid inner channel (4) are in regular triangle and are staggered, so that the spiral sections are integrally formed into a hexagonal spiral channel; the diffusion section of the cold fluid inner channel (5) is positioned in the hot fluid distribution cavity (7), and the diffusion section of the hot fluid inner channel (4) is positioned in the cold fluid distribution cavity (2); in the hot fluid distribution chamber (7), the small channels of the diffuser section of the cold fluid inner channel (5) are changed into a circle from a triangle and the flow path is enlarged along the diffusion direction, and in the cold fluid distribution chamber (2), the small channels of the diffuser section of the hot fluid inner channel (4) are changed into a circle from a triangle and the flow path is enlarged along the diffusion direction; the spiral sections of the cold fluid inner channel and the hot fluid inner channel rotate for 360 degrees; the cold fluid outer pipe (1) and the hot fluid outer pipe (6) are arranged in different directions; the relation between the total heat exchange area A of the spiral section and the side length a of the regular triangle, the total channel number n of the regular triangle and the heat exchange length l of the spiral section is as follows:

2. a hexagonal spiral channel compact heat exchanger as claimed in claim 1 wherein: the hexagonal spiral channel compact heat exchanger is a countercurrent double-flow heat exchanger.