CN212566999U - Primary surface type heat exchanger core - Google Patents

Abstract

The utility model provides a once surface formula heat exchanger core, including a plurality of heat exchanger fins that set up side by side and the strip of paper used for sealing of setting on the heat exchanger fin edge, wherein, heat exchanger fin cross-sectional area equals 3 times the product of heat exchanger fin periodic unit length and fin thickness. The utility model provides a fin blank pressing back that once surface formula heat exchanger core provided, blank pressing thickness is approximately 3 times fin thickness, and the gap on the high and blank pressing of blank pressing intensity is small, is showing the welding performance who has improved fin blank pressing and strip of paper used for sealing.

Description

Primary surface type heat exchanger core

Technical Field

The utility model relates to an energy power technical field, concretely relates to once surface formula heat exchanger core.

Background

The heat exchanger has wide application in the chemical industry, energy industry and other industries, and the common forms of the heat exchanger at present include shell-and-tube type, plate-fin type, plate type, primary surface and other forms. The primary surface heat exchanger is usually formed by processing a metal sheet with the thickness of 0.1-0.3 mm, a metal plate sheet is formed into fins with certain characteristics after being stamped, and a heat exchange core body is formed by overlapping a plurality of layers of fins, but the prior primary surface heat exchanger has the following difficulties in the design and manufacturing process: 1. the fins in the core body are self-supporting, the structural strength is high, but no support is arranged in the middle of the edge pressing structure at the inlet and the outlet, and the strength is lower; 2. the structure that fin blank pressing and strip of paper used for sealing combined together is often adopted to core exit structure, because fin thickness is very little, the fin is very big with the welding degree of difficulty of strip of paper used for sealing, in addition, after the corrugated fin flattens, blank pressing surface can the unevenness usually, can have the situation that one deck fin and three-layer fin appear in turn, forms discontinuous recess and boss, this can greatly reduced blank pressing and strip of paper used for sealing welded reliability, produces welding defect easily, reduces equipment life.

Accordingly, it is desirable to provide a primary surface heat exchanger core that solves the above-identified problems.

Disclosure of Invention

The utility model relates to a solve above-mentioned problem and go on, aim at provides a surface heat exchanger core once, and the fin blank pressing thickness that the core was imported and exported equals 3 times fin thickness, the surface heat exchanger core once that blank pressing structural strength is high.

The utility model provides a once surface formula heat exchanger core, including a plurality of heat exchanger fins that set up side by side and the strip of paper used for sealing of setting on the heat exchanger fin edge, wherein, heat exchanger fin cross-sectional area equals 3 times the product of heat exchanger fin periodic unit length and fin thickness.

The utility model provides a once surface formula heat exchanger core still has such characteristic, the heat exchanger fin is including setting up the ripple fin district in the straight fin district of business turn over mouth section and the main heat transfer section of core.

The utility model provides a once surface formula heat exchanger core still has such characteristic, straight fin district is equipped with the edging structure.

The utility model provides a once surface formula heat exchanger core still has such characteristic, blank pressing structure with be equipped with between the corrugated fin and reserve the section, the length of reserving the section does corrugated fin's half wavelength.

The utility model provides a once surface formula heat exchanger core still has such characteristic, the blank pressing structure with reserve and be equipped with the changeover portion between the section.

The utility model provides a surface formula heat exchanger core once still has such characteristic, the length of changeover portion is half wavelength of corrugated fin.

The utility model provides a once surface formula heat exchanger core still has such characteristic, changeover portion cross-section sudden change department radius angle.

The utility model provides a once surface formula heat exchanger core still has such characteristic, the strip of paper used for sealing welding is in the blank pressing is structural.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a fin blank pressing back that once surface formula heat exchanger core provided, blank pressing thickness is approximately 3 times fin thickness, and the gap on the high and blank pressing of blank pressing intensity is small, is showing the welding performance who has improved fin blank pressing and strip of paper used for sealing.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a primary surface heat exchanger core fin according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a single periodic unit fin of a primary surface heat exchanger core provided in an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a heat exchanger fin provided with no blank pressing according to an embodiment of the present invention;

fig. 4 is a schematic view of an inlet/outlet structure of a primary surface heat exchanger core according to an embodiment of the present invention;

wherein,

1: a corrugated fin region; 2: a straight fin region; 21: a transition section; 22: reserving a section; 23: a blank pressing structure; 3: a seal is provided.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically illustrated in conjunction with the accompanying drawings.

In the description of the embodiments of the present invention, it should be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for the convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The utility model provides a once surface formula heat exchanger core, this core include a plurality of heat exchanger fins that set up side by side and the strip of paper used for sealing of setting on the heat exchanger fin edge, wherein, heat exchanger fin cross-sectional area equals 3 times the product of heat exchanger fin cycle unit length and fin thickness, heat exchanger fin adopt deep-drawing method to process. As shown in fig. 1, the heat exchanger fin comprises a straight fin area 2 arranged at the inlet and outlet section and a corrugated fin area 1 of the core main heat exchange section, the straight fin is convenient for edge pressing and flow guiding, and the corrugated fin is beneficial to enhancing heat transfer. As shown in fig. 2-3, if the cross-sectional area S of the periodic unit is equal to (or slightly smaller than) 3 times the product of the length l of the periodic unit and the thickness b of the fin, i.e., if S is 2.981b, the binder thickness is 3 layers of fins, and the width of the gap a of the groove is 0.1 mm. As shown in fig. 3, the heat exchanger fin is not pressed, the fin is in a shape of a Chinese character ji, and the width of the cross section of the fin is the length l of the periodic unit of the heat exchanger fin.

The edge pressing structure 23 is arranged in the straight fin area 2, edge pressing is started from the connection position of the straight fin and the corrugated fin, in order to reduce mechanical damage to the fin during edge pressing, as shown in fig. 2, a transition section 21 is arranged between the fin and a flattening part, a section mutation position is rounded off, the length of the transition section 21 is determined by the section parameter of the fin, and as shown in fig. 4, the seal strip 3 is welded at the edge pressing position.

In the above embodiment, when the fin is pressed, the material is redistributed due to plastic deformation, so that the pressing surface has grooves or projections, such as the gap of the grooves shown in fig. 2, and the groove gap is formed because the material of the section of the fin is more than the material of the length of the periodic unit, but does not satisfy the relationship of 3 times. If the cross-sectional area of one periodic unit is equal to 2.5 times the periodic unit length times the fin thickness, then the edge hold results in a discontinuous 3-layer fin structure. The cross section area of the heat exchanger fin is limited to be 3 times of the product of the cycle unit length and the fin thickness, so that the groove gap width a is smaller than the single-layer fin thickness, the fin thickness is 3 times of the fin after the fin is subjected to edge pressing, the edge pressing surface is a continuous plane, the thickness is consistent, the welding difficulty is reduced, and the welding quality is guaranteed.

In another embodiment of the present invention, considering that the fluid flows in the inlet and outlet complicatedly, the local pressure loss is large, the reserved section is set in the straight fin area 2 to stabilize the flow of the fluid, the reserved section 22 is half of the wavelength Lw of the corrugated fin, and the remaining straight fin area except the reserved section is flattened.

In another embodiment of the present invention, the length of the transition section 21 is equal to half of the corrugated fin wavelength Lw.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The primary surface type heat exchanger core is characterized by comprising a plurality of heat exchanger fins arranged in parallel and sealing strips arranged on the edges of the heat exchanger fins, wherein the cross section area of each heat exchanger fin is equal to 3 times of the product of the length of a periodic unit of each heat exchanger fin and the thickness of each fin.

2. A primary surface heat exchanger core as claimed in claim 1, wherein the heat exchanger fins comprise straight fin regions disposed in the inlet and outlet sections and corrugated fin regions disposed in the primary heat exchange section of the core.

3. A primary surface heat exchanger core according to claim 2, wherein the straight fin regions are provided with hold-down structures adjacent the inlet and outlet locations.

4. A primary-surface heat exchanger core according to claim 3, wherein a reserved section is provided between the hold-down structure and the corrugated fin region, the reserved section having a length of one-half wavelength of the corrugated fin.

5. A primary surface heat exchanger core according to claim 4, wherein a transition section is provided between the hold-down structure and the reserved section.

6. A primary surface heat exchanger core according to claim 5, wherein the length of the transition section is one-half wavelength of the corrugated fin.

7. A primary surface heat exchanger core as claimed in claim 5, wherein the transition section abrupt cross-sectional transition is rounded.

8. A primary surface heat exchanger core according to any one of claims 3 to 7, wherein the seal is welded to the hold-down structure.

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