CN214666241U

CN214666241U - Compact heat exchanger and asymmetric wing-shaped heat exchange plate thereof

Info

Publication number: CN214666241U
Application number: CN202120665046.0U
Authority: CN
Inventors: 吴家荣; 李红智; 杨玉; 张一帆; 吴帅帅
Original assignee: Xian Thermal Power Research Institute Co Ltd
Current assignee: Xian Thermal Power Research Institute Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-09
Anticipated expiration: 2031-03-31

Abstract

The utility model provides a compact heat exchanger and asymmetric wing section heat transfer slab thereof, simple structure, reasonable in design can effectively reduce or eliminate the uneven problem of heat transfer channel flow distribution when keeping strengthening the heat transfer. The asymmetric airfoil-shaped heat exchange plate comprises a heat exchange plate body and asymmetric airfoil-shaped fins arranged in a flow channel of the heat exchange plate body; the asymmetric wing-shaped fins are arranged in a bending way towards one side; the asymmetric wing type fins are sequentially arranged at intervals in the same row along the flowing direction of fluid, the direction of the curved arc line of the asymmetric wing type fins in the same row is the same, the direction of the curved arc line of the asymmetric wing type fins in adjacent rows is opposite, and a discontinuous S-shaped channel is formed between every two adjacent rows of asymmetric wing type fins.

Description

Compact heat exchanger and asymmetric wing-shaped heat exchange plate thereof

Technical Field

The utility model relates to a heat transfer device technical field specifically is a compact heat exchanger and asymmetric wing section heat transfer slab thereof.

Background

A printed circuit board heat exchanger (PCHE) is a compact heat exchanger widely used in the fields of chemical industry, aerospace, metallurgy, electric power, refrigeration and the like, and has the characteristics of compact structure, high temperature and high pressure resistance, large specific surface area and the like. The core body of the PCHE is a core component, microchannels with equivalent diameters of about 1mm are etched on a metal plate sheet to form a cold and hot plate sheet by a light or chemical etching method, and the cold and hot plate sheets are sequentially connected through a diffusion welding technology to form the core body.

The heat exchange plate on the existing PCHE core body usually comprises a plurality of micro-channels with semicircular sections and linear, Z-shaped and sinusoidal shapes along the flow direction, and the heat exchange area and the volume of each channel are the same. Because the passageway size is very little and the passageway quantity is huge in the core, and heat exchanger inlet tube internal diameter is very little for the head, and fluid can cause each passageway flow distribution uneven after getting into the head from the heat exchanger inlet tube, the problem that a large amount of passageways can not effectively be utilized for actual heat transfer effect descends.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a compact heat exchanger and asymmetric wing section heat transfer slab thereof, simple structure, reasonable in design can effectively reduce or eliminate the uneven problem of heat transfer channel flow distribution when keeping strengthening the heat transfer.

The utility model discloses a realize through following technical scheme:

an asymmetric airfoil-shaped heat exchange plate of a compact heat exchanger comprises a heat exchange plate body and asymmetric airfoil-shaped fins arranged in a flow channel of the heat exchange plate body;

the asymmetric wing-shaped fins are arranged in a bending way towards one side; the asymmetric wing type fins are sequentially arranged at intervals in the same row along the flowing direction of fluid, the direction of the curved arc line of the asymmetric wing type fins in the same row is the same, the direction of the curved arc line of the asymmetric wing type fins in adjacent rows is opposite, and a discontinuous S-shaped channel is formed between every two adjacent rows of asymmetric wing type fins.

Preferably, the asymmetric airfoil rib comprises a leading edge, a trailing edge, an upper camber line and a lower camber line; the upper camber line and the lower camber line are respectively and smoothly connected with the front edge and the rear edge, and the upper camber line and the lower camber line are bent or convex in the same direction.

Furthermore, the connecting lines of the front edge and the rear edge of the asymmetric airfoil ribs in the same row are arranged in a collinear manner.

Furthermore, the connecting lines of the front edges and the rear edges of two adjacent rows of asymmetric airfoil ribs are arranged in parallel.

Preferably, the asymmetric airfoil rib adopts NACA series asymmetric airfoil ribs.

Preferably, the heat exchange plate is etched to form the asymmetric airfoil-shaped rib by a light or chemical etching method.

A compact heat exchanger comprising a core; the core body is formed by connecting a plurality of asymmetric airfoil-shaped heat exchange plates in a stacked mode through diffusion welding.

Compared with the prior art, the utility model discloses following profitable technological effect has:

an asymmetric wing section heat transfer slab of compact heat exchanger, include the periodic fin of arranging that constitutes by a plurality of asymmetric wing sections, there is the clearance between arbitrary adjacent fin of arranging, constitutes the S type passageway that is interrupted between two adjacent lines of fins. Compared with the traditional Z-shaped or sine-shaped channel, the existence of the gap of the interrupted S-shaped channel enables fluid to freely flow between the adjacent channels, so that the problem of uneven flow distribution of each channel in the traditional heat exchange channel is solved or avoided. On the other hand, the interrupted S-shaped channel keeps the disturbance of the traditional Z-shaped or sine-shaped channel to the heat exchange fluid and keeps the effect of strengthening heat transfer.

Drawings

Fig. 1 is a schematic view of an asymmetric airfoil-shaped rib arrangement according to an embodiment of the present invention.

Fig. 2 is an illustration of an asymmetric airfoil heat exchanger plate according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of a core structure according to an embodiment of the present invention.

In the figure: core 1, heat exchange plate body 2, asymmetric airfoil rib 3, leading edge 301, trailing edge 302, camber line 303, camber line 304.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.

The utility model relates to an asymmetric airfoil type heat exchange plate of a compact heat exchanger, as shown in figure 2, which comprises a heat exchange plate body 2 and an asymmetric airfoil type fin 3 arranged in a flow channel of the heat exchange plate body 2;

the asymmetric wing-shaped rib 3 is bent towards one side; the asymmetric airfoil fins 3 are sequentially arranged at intervals along the flow direction of fluid in an in-line mode, the direction of the bending arc line of the asymmetric airfoil fins 3 in the same line is the same, the direction of the bending arc line of the asymmetric airfoil fins 3 in adjacent lines is opposite, and a discontinuous S-shaped channel is formed between every two adjacent lines of asymmetric airfoil fins 3.

Wherein, the connecting lines of the front edge 301 and the rear edge 302 of the asymmetric airfoil ribs 3 in the same row are arranged in a collinear way. The connecting lines of the front edges 301 and the rear edges 302 of two adjacent rows of asymmetric airfoil ribs 3 are arranged in parallel.

Specifically, each two rows of asymmetric airfoil-shaped fins 3 on the heat exchange plate body 2 form a period, a plurality of periods form fin arrangement along the flow direction, a gap exists between any two adjacent rows of fins, and a discontinuous S-shaped channel is formed between two adjacent rows of fins, as shown in fig. 1.

In one period of the asymmetric airfoil-shaped rib 3, a second row of ribs is formed by translating a first row of ribs along the horizontal direction and then carrying out mirror image change along the connecting line of the front edge 301 and the rear edge 302, as shown in fig. 1, the first row of ribs and the first row of ribs are translated for a certain distance along the flow direction to obtain ribs shown by dotted lines in the figure, and then the ribs with the dotted lines are carried out mirror image change about the connecting line of the front edge 301 and the rear edge 302 to obtain ribs with solid lines in the first row and the second row.

Therefore, in practice, the shapes of the asymmetric airfoil-shaped fins 3 on the heat exchange plate body 2 are the same, and regular arrangement is formed according to the arrangement requirement; in the specific preparation, the heat exchange plate is etched to form the asymmetric airfoil-shaped rib 3 on the metal plate by a light or chemical etching method, as shown in fig. 2; the heat exchange plates are connected in a laminated manner by diffusion welding to form a core body 1, as shown in FIG. 3; in the preferred embodiment, the S-shaped channels in the two adjacent asymmetric airfoil heat exchange plates are arranged in a staggered manner.

In the preferred embodiment, the asymmetric airfoil ribs 3, as shown in FIG. 1; including leading edge 301, trailing edge 302, camber line 303, and camber line 304; the upper camber line 303 and the lower camber line 304 are respectively and smoothly connected with the leading edge 301 and the trailing edge 302; the up camber line 303 and the down camber line 304 exist asymmetrically with respect to a line connecting the leading edge 301 and the trailing edge 302; the upper arc 303 and the lower arc 304 are curved or convex in the same direction.

In particular, the asymmetric airfoil rib 3 comprises a leading edge 301, a trailing edge 302, an up camber line 303 and a down camber line 304, and may be, but is not limited to, an NACA series asymmetric airfoil, and the preferred embodiment is illustrated by an example of an NACA9410 rib in the airfoil, as shown in fig. 1. The upper camber line 303 and the lower camber line 304 of the asymmetric airfoil type NACA9410 rib are respectively and smoothly connected with the front edge 301 and the rear edge 302, the upper camber line 303 and the lower camber line 304 of the asymmetric airfoil type NACA9410 rib are asymmetrically arranged about the connecting line of the front edge 301 and the rear edge 302, and the upper camber line 303 and the lower camber line 304 of the asymmetric airfoil type NACA9410 rib are bent upwards or convex upwards, as shown in FIG. 1.

According to the above embodiment, the utility model provides a pair of compact heat exchanger and asymmetric airfoil heat transfer slab thereof adopts current light or chemical etching method and diffusion welding process, and is technically mature reliable. The discontinuous S-shaped channel is formed between two adjacent rows of fins, so that the traditional Z-shaped or sinusoidal channel is ensured to enhance the heat transfer effect, and simultaneously, the fluid between the adjacent channels can flow freely, the problem of uneven flow distribution of each heat exchange channel is improved or eliminated, and the actual heat exchange effect cannot be greatly reduced due to uneven flow of the channels.

The above description is only a preferred example of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An asymmetric airfoil-shaped heat exchange plate of a compact heat exchanger is characterized by comprising a heat exchange plate body (2) and asymmetric airfoil-shaped fins (3) arranged in a flow channel of the heat exchange plate body (2);

the asymmetric wing-shaped rib (3) is bent towards one side; the asymmetric airfoil-shaped fins (3) are sequentially arranged at intervals along the flowing direction of a fluid in an in-line mode, the direction of the bending arc line of the asymmetric airfoil-shaped fins (3) in the same line is the same, the direction of the bending arc line of the asymmetric airfoil-shaped fins (3) in adjacent lines is opposite, and a discontinuous S-shaped channel is formed between every two adjacent lines of asymmetric airfoil-shaped fins (3).

2. The asymmetric aerofoil heat exchanger plate of a compact heat exchanger according to claim 1, wherein the asymmetric aerofoil rib (3) comprises a leading edge (301), a trailing edge (302), an upper camber line (303) and a lower camber line (304); the upper camber line (303) and the lower camber line (304) are respectively and smoothly connected with the front edge (301) and the rear edge (302), and the upper camber line (303) and the lower camber line (304) are bent or convex towards the same direction.

3. The asymmetric airfoil heat exchanger plate of a compact heat exchanger according to claim 2, characterized in that the connecting lines of the leading edge (301) and the trailing edge (302) of the asymmetric airfoil fins (3) in the same row are arranged in a collinear manner.

4. The asymmetric airfoil heat exchanger plate of a compact heat exchanger according to claim 2, characterized in that the connecting lines of the leading edges (301) and the trailing edges (302) of two adjacent rows of asymmetric airfoil fins (3) are arranged in parallel.

5. The asymmetric airfoil heat exchanger plate of a compact heat exchanger as recited in claim 1 wherein said asymmetric airfoil fins (3) are NACA series asymmetric airfoils.

6. Asymmetric aerofoil heat exchanger plate for a compact heat exchanger according to claim 1, characterised in that the asymmetric aerofoil ribs (3) are obtained by photo etching.

7. Asymmetric aerofoil heat exchanger plate for a compact heat exchanger according to claim 1, characterised in that the asymmetric aerofoil ribs (3) are obtained by chemical etching.

8. A compact heat exchanger, characterized by comprising a core (1); the core body (1) is formed by connecting a plurality of asymmetric airfoil-shaped heat exchange plates according to any one of claims 1 to 6 in a laminated mode through diffusion welding.