CN114264173A

CN114264173A - Heat exchange body

Info

Publication number: CN114264173A
Application number: CN202111607758.8A
Authority: CN
Inventors: 万子潜; 黄曦; 陈喜满; 刘洋
Original assignee: Zhongshan Fuwei Environmental Technology Co ltd
Current assignee: Zhongshan Fuwei Environmental Technology Co ltd
Priority date: 2020-12-28
Filing date: 2021-12-23
Publication date: 2022-04-01
Also published as: CN112595153A

Abstract

The invention discloses a heat exchange body, comprising a plurality of adjacent sheets, wherein at least one part of the adjacent sheets at the peripheral edge part or the middle part is connected with each other; the sheet is characterized in that a plurality of convex peak lines which are arranged in parallel at intervals in rows and are convex upwards are formed on the upper plane of the sheet, a plurality of convex contour lines which are arranged in parallel at intervals in rows and are convex downwards are formed on the lower plane of the sheet, and the convex peak lines and the convex contour lines which are arranged in rows are formed by connecting continuous peaks and valleys; a first flow channel and a second flow channel are formed between every two adjacent sheets, fluid circulates in the first direction and the second direction in the first flow channel, fluid circulates in the first direction and the third direction in the second flow channel, and convection is formed by the fluid through the first flow channel and the second flow channel. The invention can improve the heat exchange efficiency, has simple structure, is easy for industrialized implementation and has controllable cost.

Description

Heat exchange body

Technical Field

The invention relates to the technical field of air heat exchange, in particular to a heat exchange body.

Background

With the rapid development of society, the living standard of people is improved, meanwhile, the surrounding living environment is seriously damaged, and the air quality is seriously reduced. In order to change the indoor air quality, air purifiers and fresh air systems have been developed. The fresh air system filters and purifies outdoor fresh air and then introduces the fresh air into the room, and exhausts indoor polluted air to the outside of the room, so that effective circulation of indoor and outdoor air is completed, and the freshness and comfort of the indoor air are ensured.

The heat exchange core of traditional new trend system has the drawback that heat exchange efficiency is low, to this problem, we have developed a new technical scheme.

Disclosure of Invention

The object of the invention is to provide a heat exchanger, which can improve the heat exchange efficiency.

The technical problem to be solved by the invention is to provide a heat exchange body which is simple in structure, easy to implement industrially and controllable in cost.

In order to achieve the above technical effects, the present invention provides a heat exchanger, comprising:

a heat exchange body comprising a plurality of adjacent sheets extending parallel to each other in the same direction;

at least a part of the adjacent sheets at the peripheral edge part or the middle part of the adjacent sheets are connected with each other, and a flow passage for flowing fluid is formed between the adjacent sheets;

the sheet is characterized in that a plurality of convex peak lines which are arranged in parallel at intervals in rows and are convex upwards are formed on the upper plane of the sheet, a plurality of convex contour lines which are arranged in parallel at intervals in rows and are convex downwards are formed on the lower plane of the sheet, and the convex peak lines and the convex contour lines which are arranged in rows are formed by connecting continuous peaks and valleys;

between every two adjacent sheets, the peak of the convex contour line is positioned between the valleys of the two convex peak lines, the peaks of the convex contour line and the valleys of the two convex peak lines are arranged in a staggered mode to form a first flow channel and a second flow channel, fluid circulates in the first flow channel along the first direction and the second direction, fluid circulates in the second flow channel along the first direction and the third direction, and convection is formed by the fluid through the first flow channel and the second flow channel;

the first direction, the second direction and the third direction are arranged at included angles, and the second direction and the third direction are parallel and opposite in direction.

In a further improvement, the fluid flows in a first direction a in the first flow channel and flows in a first direction B in the second flow channel, the first direction a and the first direction B being opposite, and the fluid forms at least two convection currents through the first flow channel and the second flow channel.

In a further improvement, the fluid circulates along the first direction to form a curve, and the curve has alternately appeared peaks and valleys;

the track formed by the circulation of the fluid along the second direction or the third direction is a straight line, and the second direction and the third direction are parallel and opposite;

and the horizontal plane included angle between the first direction and the second direction and between the first direction and the third direction is alpha, and alpha is 30-90 degrees.

In a further improvement, the fluid circulates along the first direction to form a track of a triangular wave, and the triangular wave has triangular wave crests and triangular wave troughs which alternately appear;

the first direction is perpendicular to the second direction and the third direction.

In a further improvement, the peaks of the raised contour lines extend into the valleys of the two raised peak lines, and the peaks of the raised peak lines extend into the valleys of the two raised contour lines, which are parallel to the raised peak lines.

In a further improvement scheme, the distance between the convex contour line and the convex peak line is d, and d is 0.5-5 mm;

the distance between two adjacent peaks of the convex contour line is L, and L is 2-100 mm;

the vertical distance between the peak of the convex contour line and the valley of the convex contour line is H, and H satisfies the condition that (Hx H)/(Lx L) is more than or equal to 0.75;

the included angle of the peak of the convex contour line is delta 1, the included angle of the valley of the convex peak line is delta 2, delta 1 is greater than or equal to 20.5 degrees, and delta 2 is greater than or equal to 20.5 degrees.

In a further improvement scheme, d is 1-3 mm, L is 3-50 mm, H satisfies the condition that (H & ltx & gt H)/(L & ltx & gt L & lt & gt) is not less than 1.25 and not more than 6.6, delta 1 is not less than 22 degrees and not more than 60 degrees, and delta 2 is not less than 22 degrees and not more than 60 degrees.

In a further improvement, the peak of the convex contour line extends into the valley of the two convex peak lines, and the peak of the convex peak line extends into the valley of the two convex contour lines, and the extending length occupies one quarter to two thirds of the depth of the valley;

the crest of the convex contour lines is positioned on the central line of the valley of the two convex contour lines, and the crest of the convex crest lines is positioned on the central line of the valley of the two convex contour lines.

In further improvement, be equipped with the protruding water conservancy diversion strip of multichannel on the sheet of the protruding crest line both sides in a row, the inboard tip of protruding water conservancy diversion strip joins in the tip of protruding crest line, the outer fringe department that the sheet is located the outside end of protruding water conservancy diversion strip is uncovered to be set up, and the sheet is equipped with the flange in all the other outer fringe departments.

In a further improvement, the convex diversion strips and the second direction or the third direction form an included angle beta, and beta is larger than 0 degree and smaller than 90 degrees.

In a further improvement, the raised guide strips of adjacent sheets are arranged at an included angle gamma, wherein gamma is more than 0 degrees and less than 180 degrees.

In a further improvement, the sheet material has a micropore structure, and the pore diameter of the micropores is 0.01-0.3 μm.

In a further improvement, at least one polymer composite coating is arranged on the sheet, and the polymer composite coating has selective permeability to water molecules.

Compared with the prior art, the invention has the beneficial effects that:

the invention is a heat exchange body formed by stacking and adjacently connecting a plurality of sheets. A plurality of flow channels are formed between the convex crest lines arranged in rows and the convex contour lines arranged in rows, fluid (airflow) flows in the flow channels formed between the convex crest lines and the convex contour lines, and the sheets on the upper layer and the sheets on the lower layer are arranged in a staggered and parallel manner. After stacking, the convex contour line of the upper sheet is staggered with the convex peak line of the lower sheet, the peak of the convex contour line is inserted downwards into the valley of the convex peak line, the peak of the convex peak line is inserted upwards into the valley of the convex contour line, two sides of the peak of the convex contour line and two sides of the valley of the convex peak line form two-side gaps, fluid flows along the valley bottom of the convex contour line, the valley bottom of the convex peak line and the gaps on the two sides, the heat exchange area of the fluid is greatly increased, and the heat exchange efficiency is obviously improved.

First flow channels and second flow channels are formed between channels formed by the peaks and the valleys among the adjacent three sheets, each first flow channel and each second flow channel are in bypass, fluid circulates in the first flow channels along the first direction and the second direction, and fluid circulates in the second flow channels along the first direction and the third direction. In the heat exchange process, two air flows realize convective heat transfer and mass transfer through the middle sheet. The first air flow passes through the first flow channel and advances in a second direction, the second air flow passes through the second flow channel and advances in a third direction, and the second direction is parallel to the third direction and opposite to the third direction so as to form convection in the direction vertical to the paper surface. Meanwhile, the first air flow and the second air flow also meander and advance through a gap formed between the convex contour line and the convex crest line, the first air flow meanders and advances in a first direction A in the first flow channel, the second air flow meanders and advances in a first direction B in the second flow channel, and the first direction A and the first direction B are opposite in direction, so that another convection current is formed in the horizontal direction.

Therefore, the invention realizes convection heat transfer and mass transfer by utilizing a plurality of air flows through the middle sheet, so that the flowing speed distribution of the air flows is more uniform, the flowing speed of the air flows can be reduced, the resistance of the air flows passing through the flow channel is reduced, and the heat exchange efficiency is improved.

Moreover, the invention has simple structure, easy industrial implementation and controllable cost.

Drawings

FIG. 1 is a perspective view of a heat exchange body according to the present invention;

FIG. 2 is a first schematic view of the heat exchange body according to the present invention;

FIG. 3 is a second schematic view of the heat exchange body of the present invention in an exploded configuration;

FIG. 4 is a cross-sectional view of a heat exchange body of the present invention;

FIG. 5 is a partial enlarged view of portion A of FIG. 4;

FIG. 6 is a first perspective view of the sheet of the present invention;

FIG. 7 is a second perspective view of the sheet of the present invention;

FIG. 8 is a front view of the sheet of the present invention;

FIG. 9 is a schematic view of an embodiment of a cross section between adjacent sheets;

FIG. 10 is a schematic view of the flow channel shown in FIG. 9;

FIG. 11 is a schematic illustration of the maximum velocity variation within a flow channel of the present invention;

FIG. 12 is a schematic view of the velocity profile of the center of the flow channel within the flow channel of the present invention;

FIG. 13 is a velocity flow field profile of example 1 of the present invention;

FIG. 14 is a velocity flow field profile of example 2 of the present invention;

FIG. 15 is a velocity flow field profile of example 3 of the present invention;

FIG. 16 is a velocity flow field profile of example 4 of the present invention;

fig. 17 is a velocity flow field profile of example 5 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.

The orientation shown in the drawings is not to be construed as limiting the specific scope of the invention, but is for the best understanding of the preferred embodiments only, and changes in location or addition of numbers or structural simplifications may be made to the product parts shown in the drawings.

The relation of "connected" between the components shown in the drawings and described in the specification can be understood as fixedly connected or detachably connected or integrally connected; the connecting elements can be directly connected or connected through an intermediate medium, and persons skilled in the art can understand the connecting relation according to specific conditions, and can use the connecting elements in a screwed connection or riveting connection or welding connection or clamping connection or embedding connection mode to replace different embodiments in a proper mode.

The terms of orientation such as up, down, left, right, top, bottom, and the like in the description and the orientation shown in the drawings, may be used for direct contact or contact with each other through another feature therebetween; above may be directly above and obliquely above, or it simply means above the other; other orientations may be understood by analogy.

The present invention provides a heat exchange body, as shown in fig. 1 to 6, comprising a plurality of adjacent sheets 10, the plurality of adjacent sheets 10 being stacked to form the heat exchange body. In this embodiment, the sheet is a hexagonal sheet.

The adjacent sheets 10 extend parallel to each other in the same direction, at least a part of the adjacent two sheets 10 at the peripheral edge or the middle thereof is connected to each other, and a flow channel for fluid flow is formed between the adjacent two sheets 10; the sheet 10 is provided with a plurality of convex peak lines 20 which are arranged in parallel at intervals in a row and are convex upwards on the upper plane, the sheet 10 is provided with a plurality of convex contour lines 30 which are arranged in parallel at intervals in a row and are convex downwards on the lower plane, and the convex peak lines 20 and the convex contour lines 30 which are arranged in a row are formed by connecting continuous peaks and valleys; between two adjacent sheets 10, the peak of the convex contour line 30 is located between the valleys of the two convex peak lines 20, and the peaks of the convex contour line 30 and the valleys of the two convex peak lines 20 are staggered.

As shown in fig. 6 to 10, the peak 30A of the convex contour line 30 is inserted downward into the valley 20B of the convex contour line 20, the peak 20A of the convex contour line 20 is inserted upward into the valley 30B of the convex contour line 30, both sides of the peak 30A of the convex contour line 30 and both sides of the valley 20B of the convex contour line 20 form both-side slits, and the fluid flows along the bottom of the valley 30B of the convex contour line 30, the bottom of the valley 20B of the convex contour line 20, and both-side slits.

A first flow channel 40 and a second flow channel 50 are formed between channels formed by peaks and valleys among the adjacent three sheets, each first flow channel 40 and each second flow channel 50 are in bypass, fluid circulates in the first direction and the second direction in the first flow channel 40, fluid circulates in the first direction and the third direction in the second flow channel 50, and the fluid forms convection through the first flow channel 40 and the second flow channel 50; the first direction, the second direction and the third direction are arranged at included angles, and the second direction and the third direction are parallel and opposite in direction.

As shown in fig. 10, the first direction is a horizontal direction, and the second direction and the third direction are directions perpendicular to the paper surface, the second direction being a direction inward from the paper surface, and the third direction being a direction outward from the paper surface.

The first direction may be a horizontal direction, including a direction meandering horizontally to the left, or a direction meandering horizontally to the right. The second direction is the direction indicated by x in the drawing, which represents the direction toward the inside of the vertical paper, and the third direction is the direction indicated by · in the drawing, which represents the direction toward the outside of the vertical paper.

Preferably, the fluid flows in the first flow path in a first direction a which is a direction meandering horizontally to the right; the fluid circulates in the second flow channel along a first direction B, the first direction B is a direction which horizontally meanders towards the left, the first direction A and the first direction B are opposite, and the fluid forms at least two convection currents through the first flow channel and the second flow channel.

In the heat exchange process, at least two air flows in the adjacent three sheets realize convective heat and mass transfer through the middle sheet. The first air flow passes through the first flow channel and advances in a second direction, the second air flow passes through the second flow channel and advances in a third direction, and the second direction is parallel to the third direction and opposite to the third direction so as to form convection in the direction vertical to the paper surface. Meanwhile, the first air flow and the second air flow also meander and advance through a gap formed between the convex contour line and the convex crest line, the first air flow meanders and advances in a first direction A in the first flow channel, the second air flow meanders and advances in a first direction B in the second flow channel, and the first direction A and the first direction B are opposite in direction, so that another convection current is formed in the horizontal direction.

Preferably, the trajectory of the fluid circulating in the first direction is a curved line having alternately peaks and valleys, and the air current flows through the first and

second flow channels

40 and 50 while meandering through the gaps formed between the convex contour lines 30 and the convex peak lines 20. The trajectory of the air stream may be varied, such as but not limited to a sine wave, a triangular wave, etc.

The trajectory formed by the circulation of the fluid along the second direction or the third direction is a straight line, and the second direction and the third direction are parallel and opposite, which is beneficial to forming convection in the first flow channel 40 and the second flow channel 50. And the horizontal plane included angle between the first direction and the second direction and between the first direction and the third direction is alpha, and alpha is 30-90 degrees.

More preferably, as shown in fig. 9 and 10, the fluid circulates along the first direction to form a triangular wave having triangular wave peaks and triangular wave troughs alternately. The track formed by the circulation of the fluid along the first direction meets the sawtooth function. When the trajectory formed by the fluid flowing in the first direction in the first flow channel 40 and the second flow channel 50 is a triangular wave, the peak 20A of the convex peak line 20, the valley 20B of the convex peak line 20, the peak 30A of the convex contour line 30, and the valley 30B of the convex contour line 30 all form an included angle. The included angle is preferably acute.

The track that the fluid circulated along first direction and formed is the triangle wave, and the heat transfer area of fluid and runner is big to can reduce the speed that the air current flows, reduce the resistance that the air current passes through the runner, make the speed distribution that the air current flows more even, show improvement heat exchange efficiency.

Preferably, the peak 30A of the convex contour line 30 extends into the valley 20B of the two convex peak lines 20, the peak 20A of the convex peak line 20 extends into the valley 30B of the two convex contour lines 30, the convex contour lines 30 are parallel to the convex peak lines 20, and the slopes of the two are the same in the same length direction. The peaks of the convex contour lines 30 are located on the center line of the valleys of the two convex peak lines 20, and the peaks of the convex peak lines 20 are located on the center line of the valleys of the two convex contour lines 30.

As another embodiment of the flow channel, the fluid flowing along the first direction forms a trajectory close to a triangular wave, however, the peak 20A of the convex peak line 20, the valley 20B of the convex peak line 20, the peak 30A of the convex contour line 30, and the valley 30B of the convex contour line 30 are provided with bending transition sections. Alternatively, the included angle formed by the peak 20A of the convex peak line 20, the valley 20B of the convex peak line 20, the peak 30A of the convex contour line 30, and the valley 30B of the convex contour line 30 is a rounded transition, but is not limited thereto. The invention is beneficial to industrial implementation by arranging bending transition or fillet transition.

It should also be noted that the sheet may be a sheet of various shapes, preferably a hexagonal sheet. The sheet material may also be a square sheet material, a circular sheet material, an oval sheet material, an octagon sheet material, a diamond sheet material, etc., and is not limited thereto.

Therefore, the present invention is integrated into a heat exchange body by stacking and adjacently connecting a plurality of sheets. A plurality of sheets are stacked to form first flow passages and second flow passages which alternate with each other.

Flow channels are formed between adjacent sheets, specifically, a plurality of flow channels are formed between the convex peak lines 20 arranged in rows and the convex contour lines 30 arranged in rows, fluid (airflow) flows in the flow channels formed between the convex peak lines 20 and the convex contour lines 30, and the sheets of the upper layer and the sheets of the lower layer are arranged in a staggered and parallel manner. After stacking, the convex contour lines 30 of the upper layer sheets are staggered with the convex peak lines 20 of the lower layer sheets, the peaks 20A of the convex peak lines 20 are upwards inserted into the valleys 30B of the convex contour lines 30, two sides of the peaks 30A of the convex contour lines 30 and two sides of the valleys 20B of the convex peak lines 20 form two-side gaps, and fluid flows along the bottoms of the valleys 30B of the convex contour lines 30 and the bottoms and the gaps of the two sides of the valleys 20B of the convex peak lines 20, so that the heat exchange area of the fluid is greatly increased, and the heat exchange efficiency is obviously improved.

The invention realizes convection heat transfer and mass transfer by utilizing a plurality of air flows through the middle sheet, and the plurality of air flows flow through the first flow channel and the second flow channel, so that the flowing speed of the air flows is more uniform, the flowing speed of the air flows can be reduced, the resistance of the air flows passing through the flow channels is reduced, and the heat exchange efficiency is improved.

Further, the distance between the convex contour line and the convex peak line is d, d is preferably 0.5-5 mm, and specifically 0.5mm, 1mm, 2mm, 3mm, 4mm and 5mm can be selected, but not limited thereto. More preferably, d is 1 to 4 mm. Preferably, d is 1 to 3 mm.

The distance d between the convex contour line and the convex peak line can influence the maximum speed of the airflow and the speed change of the center of the flow channel, thereby influencing the uniformity of the air flow. The d of the invention can be selected from 0.5-5 mm, when the d is 0.5-5 mm and the inlet air speed is 1m/s, the maximum speed of the air flow is lower than 2.6m/s, the speed variation of the center of the flow channel is less than or equal to 12%, and better air flow uniformity can be obtained.

As shown in FIG. 11, when d is gradually increased from 0.5mm, the maximum speed of the airflow is gradually decreased, and when d is increased from 0.5mm to 1-2.5 mm, the maximum speed of the airflow is in the lowest range, and the maximum speed can be decreased by 20-30%. When d is increased from 1-2.5 mm to 4-5 mm, the maximum speed of the airflow is slowly increased, and the maximum speed increase amplitude is less than 10%. The lower the maximum velocity of the air flow, the better the flow uniformity of the air is represented.

As shown in FIG. 12, when d is gradually increased from 0.5mm to 3mm, the velocity variation at the center of the flow channel is very small and the velocity is maintained substantially constant, and when d is increased from 3mm to 5mm, the velocity at the center of the flow channel is gradually increased and the velocity variation at the center of the flow channel is less than or equal to 12%.

The distance between two adjacent peaks of the convex contour line is L, and the L is preferably 2-100 mm. More preferably, L is 3 to 50 mm. The vertical distance between the peak of the convex contour line and the valley of the convex contour line is H, and H satisfies the condition that (Hx H)/(Lx L) is more than or equal to 0.75. More preferably, H is 1.25 or less (Hx H)/(Lx L) or less than 6.6.

The distance L between two adjacent peaks of the convex contour line, and the vertical distance H between the peak of the convex contour line and the valley of the convex contour line jointly influence the heat exchange effect and the manufacturability of the sheet. The (HxH)/(LxL) is not less than 0.75, so that a good heat dissipation effect can be obtained. In principle, the larger the ratio (Hx H)/(Lx L), the larger the heat exchange area of the heat exchange body, and the better the heat exchange effect. However, if the ratio of (HxH)/(LxL) exceeds a suitable range, i.e., (HxH)/(LxL) > 6.6, the draw ratio becomes too large, the difficulty of the sheet manufacturing process is high, the cost is high, and the service life is affected.

The included angle of the peak of the convex contour line is delta 1, the included angle of the valley of the convex peak line is delta 2, delta 1 is greater than or equal to 20.5 degrees, and delta 2 is greater than or equal to 20.5 degrees. More preferably, the delta 1 is more than or equal to 22 degrees and less than or equal to 60 degrees, and the delta 2 is more than or equal to 22 degrees and less than or equal to 60 degrees. The delta 1 and the delta 2 are more than or equal to 20.5 degrees, so that the heat exchange area can be ensured to be in a larger range, and good heat exchange efficiency is obtained. If delta 1 and delta 2 are more than 60 degrees, the stretching ratio is too small, and the exchange area of the heat exchange core cannot be ensured; if δ 1 and δ 2 are less than 20.5 °, the difficulty of the manufacturing process of the sheet is high.

The peak of the convex contour line extends into the valley of the two convex contour lines, and the peak of the convex contour line extends into the valley of the two convex contour lines, the extending length preferably occupies one quarter to two thirds of the valley depth, and specifically, one quarter, one third, one half, two thirds can be selected, but the invention is not limited thereto, the exchange area of the heat exchange core can be ensured, and the uniformity of the fluid velocity distribution can be improved.

In summary, according to the present invention, the distance d between the convex contour line and the convex peak line, the distance L between two adjacent peaks of the convex contour line, and the vertical distance H between the peak of the convex contour line and the valley of the convex contour line, the included angle between the peaks of the convex contour line is δ 1, the included angle between the valleys of the convex peak line is δ 2, etc., jointly affect the uniformity of the airflow flow, the heat exchange area, and the uniformity of the velocity flow field distribution, so as to obtain the optimal heat exchange efficiency.

Be equipped with the protruding water conservancy diversion strip of multichannel 60 on the sheet of the protruding crest line 20 both sides in a row, the inboard tip of protruding water conservancy diversion strip 60 joins in the tip of protruding crest line 20, the sheet is located the uncovered setting of outer fringe department of the outside end of protruding water conservancy diversion strip 60, and the sheet is equipped with flange 70 in all the other outer fringe departments. The arrangement of the raised guide strips 60 can change the airflow flow path on one hand, so that the airflow flow path can be flexibly changed, and on the other hand, the flowing speed of the airflow is also changed, the heat exchange time is prolonged, and the heat exchange efficiency is improved.

The raised flow guide strips 60 are disposed at an included angle β with the second direction or the third direction, so that fluid can flow in the first flow channel along the first direction and flow in the second direction or the third direction. Preferably, 0 DEG < beta < 90 deg. More preferably, beta is not less than 30 degrees and not more than 60 degrees.

The convex guide strips of the adjacent sheets are arranged at an included angle gamma, preferably, gamma is more than 0 degree and less than 180 degrees. More preferably, gamma is not less than 30 degrees and not more than 150 degrees.

As a more preferable embodiment of the present invention, the sheet has a micro-porous structure distributed over the convex peak lines and the convex contour lines. The microporous structure is favorable for water molecules to permeate, and the humidity exchange of the heat exchanger is realized. Preferably, the sheet is provided with a plurality of micropores with the aperture of 0.01-0.3 mu m. More preferably, the aperture of the micropores is 0.02 to 0.15 μm. Most preferably, the pore diameter of the micropores is 0.05-0.1 μm.

The micropores form channels through which water molecules pass, and can allow the water molecules to reciprocate between the first flow channels. In the practical use process, the water vapor content of the air flow in the first flow passage and the air flow in the second flow passage are different, so that a water vapor concentration difference is formed, the water vapor concentration difference provides driving force for the diffusion of the water vapor, and water molecules can penetrate through one side with low concentration through micropores, so that the aim of exchanging the water vapor in the first flow passage and the second flow passage is finally fulfilled, and the uniformity of heat exchange is facilitated.

The sheet is provided with at least one layer of polymer composite coating, the polymer composite coating has selective permeability to water molecules, has a humidity exchange function while exchanging temperature, can realize simultaneous exchange of sensible heat and latent heat, does not allow other gas molecules to permeate, ensures the sealing property of the heat exchange core body, is suitable for a fresh air system, and avoids mixing of fresh air and exhaust air. Preferably, the polymer composite coating may be formed by one or more of polyethylene oxide, polystyrene, polycarbonate, polymethyl methacrylate, polyacrylic acid, polyether polyamide, aliphatic polyurethane, sulfonated styrene, sulfonated polyacrylic acid, and sulfonated polyether ether ketone.

The invention is further illustrated by the following specific examples

A heat exchange body including a plurality of adjacent sheets extending parallel to each other in the same direction; at least a part of the adjacent sheets at the peripheral edge part or the middle part of the adjacent sheets are connected with each other, and a flow passage for flowing fluid is formed between the adjacent sheets; the sheet is characterized in that a plurality of convex peak lines which are arranged in parallel at intervals in rows and are convex upwards are formed on the upper plane of the sheet, a plurality of convex contour lines which are arranged in parallel at intervals in rows and are convex downwards are formed on the lower plane of the sheet, and the convex peak lines and the convex contour lines which are arranged in rows are formed by connecting continuous peaks and valleys; between two adjacent sheets, the peak of protruding profile line is located between the millet of two protruding peak lines, and crisscross setting between the peak of protruding profile line and the millet of two protruding peak lines, and the distance between protruding profile line and the protruding peak line is d, and the distance between the two adjacent peaks of protruding profile line is L, the peak of protruding profile line with perpendicular distance between the millet of protruding profile line is H, and the contained angle of the peak of protruding profile line is delta 1, the contained angle of the millet of protruding peak line is delta 2.

Between three adjacent sheets, the peak of protruding profile line is located between the valley of two protruding peak lines, and stagger setting between the peak of protruding profile line and the valley of two protruding peak lines to form first runner and second runner, fluid circulates along first direction A and second direction in first runner, and fluid circulates along first direction B and third direction in the second runner, and fluid passes through first runner and second runner formation convection current.

The dimensions of the heat exchange bodies of examples 1-5 are set with reference to table 1:

TABLE 1 dimension table of heat-exchange body

Item	Example 1	Example 2	Example 3	Example 4	Example 5
						d	1mm	2mm	3mm	4mm	6mm
L	3mm	5mm	8mm	10mm	15mm
						H	3.5mm	7mm	10mm	17mm	25mm
δ1	46.4°	39.3°	43.6°	32.8°	33.4°
						δ2	22°	25°	30°	40°	35°

Computer simulation of the fluid velocity distribution of the heat exchangers shown in examples 1-5 resulted in very uniform fluid velocity distribution of the heat exchangers of examples 1-3, as shown in FIGS. 13-17; the heat exchanger of example 4 also had a relatively uniform fluid velocity distribution. The heat exchange body of example 5, which had a poorer fluid velocity profile than that of examples 1-4, substantially met the demand in less demanding applications.

The heat-exchange bodies of examples 1 to 5 were tested for exchange efficiency, and the results are shown in Table 2 below:

TABLE 2 Heat exchange Effect table of Heat exchange body

The experimental results of table 2 are based on the following experimental conditions: the outdoor temperature is 35 ℃, the outdoor humidity is 28 ℃, the indoor temperature is 27 ℃, the indoor humidity is 19.5 ℃, the air flow speed is 1m/s, and the projected heat exchange area is 20 square meters.

It should be noted that, the experimental apparatus adopted in the experiment is a heat recovery enthalpy difference chamber, and the experimental method is performed with reference to a heat recovery fresh air handling unit in GB/T21087-.

The humidity is dew point temperature, which is the temperature when the air is cooled to saturation under the condition that the water vapor content and the air pressure are not changed, and is measured by a wet-dry bulb hygrometer.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A heat exchange body comprising a plurality of adjacent sheets, said adjacent sheets extending parallel to one another in a common direction;

2. A heat exchange body according to claim 1, wherein the fluid flows in a first direction a in a first flow channel and in a first direction B in a second flow channel, the first direction a and the first direction B being opposite, the fluid flowing through the first flow channel and the second flow channel forming at least two convection currents.

3. The heat exchange body according to claim 1, wherein the fluid circulates in the first direction along a curved path having alternately peaks and valleys;

4. The heat exchange body according to claim 3, wherein the fluid circulates in the first direction along a trajectory of a triangular wave having triangular peaks and triangular valleys alternately;

5. The heat exchange body according to claim 1, wherein the peaks of the convex profile lines are deep into valleys of two convex profile lines, and the peaks of the convex profile lines are deep into valleys of two convex profile lines, the convex profile lines being parallel to the convex profile lines.

6. The heat exchanger according to claim 5, wherein the distance between the convex profile line and the convex crest line is d, and d is 0.5 to 5 mm;

7. The heat exchange body according to claim 6, wherein d is 1 to 3mm, L is 3 to 50mm, and H satisfies 1.25. ltoreq. (Hx H)/(Lx L). ltoreq.6.6, 22. ltoreq. delta.1. ltoreq.60 °, 22. ltoreq. delta.2. ltoreq.60 °.

8. The heat exchange body according to claim 1, wherein the peaks of the convex profile lines are deep into the valleys of the two convex peak lines, and the peaks of the convex peak lines are deep into the valleys of the two convex profile lines, the depth of the deep protrusions occupying one quarter to two thirds of the depth of the valleys;

9. The heat exchanger body according to claim 1, wherein a plurality of the convex guide strips are provided on the sheet material on both sides of the convex crest lines in the row, the inner ends of the convex guide strips are joined to the ends of the convex crest lines, the sheet material is provided with an opening at the outer edge of the outer end of the convex guide strip, and the sheet material is provided with a rib at the remaining outer edge.

10. A heat exchange body according to claim 9, wherein the raised strips are disposed at an angle β to the second or third direction, 0 ° < β < 90 °.

11. The heat exchange body according to claim 9, wherein the raised strips of adjacent sheets are disposed at an included angle γ, 0 ° < γ < 180 °.

12. The heat exchange body according to claim 1, wherein the sheet has a microporous structure, and the pores have a pore diameter of 0.01 to 0.3 μm.

13. The heat exchange body of claim 1, wherein the sheet material has at least one polymeric composite coating thereon, the polymeric composite coating being selectively permeable to water molecules.