CN219301366U - Novel printed circuit board type heat exchanger core body of three-dimensional spiral winding type runner - Google Patents

Abstract

The utility model provides a three-dimensional spiral winding type runner printed circuit board type heat exchanger core body, which comprises: and the metal plates are overlapped in multiple layers and welded into a whole through vacuum diffusion welding, and the surfaces of the metal plates are provided with etched flow channels. The heat exchanger core includes: a metal plate with a plurality of discontinuous flow channels on the two sides, a plurality of perforated metal plates and upper and lower cover plates with a plurality of discontinuous flow channels on the single side; the heat exchanger core is formed by superposing plates; the upper cover plate and the lower cover plate are overlapped, the perforated metal plate is arranged in the middle of the upper cover plate and the lower cover plate, and the metal plates of the discontinuous flow channels are periodically overlapped; the upper and lower cover plates are directly connected with the perforated metal plate. The device increases the heat exchange area and improves the heat exchange quantity. And effectively enhances disturbance and eliminates axial heat conduction effect.

Description

Novel printed circuit board type heat exchanger core body of three-dimensional spiral winding type runner

Technical Field

The utility model relates to the technical field of heat exchange devices, in particular to a novel three-dimensional spiral winding type runner printed circuit board type heat exchanger core body.

Background

The printed circuit board type heat exchanger (Printed Circuit Heat Exchanger, PCHE) is a compact microchannel heat exchanger, and compared with the traditional plate type and shell-and-tube type heat exchanger, the heat exchanger has the advantages of high compactness, high pressure resistance, low temperature resistance, high heat exchange efficiency, high reliability and the like due to the adoption of photochemical etching and vacuum diffusion welding technologies. In recent years, studies have been widely conducted in the fields of nuclear energy, solar energy, natural gas, and the like.

The printed circuit board type heat exchanger core is formed by welding a plurality of plates processed by photochemical etching through a vacuum diffusion welding technology. The flow channel forms are mainly linear type, Z-shaped, S-shaped and discontinuous fin type. The cross section of the flow channel is mainly semicircular due to the adoption of photochemical etching technology.

The flow channels in different forms enhance the heat exchange effect by enhancing the disturbance of the fluid in the heat exchanger, and the heat exchange effect is enhanced, but the flow resistance is increased, so that the pumping cost is increased. Whereas conventional flow channel forms can be seen as two-dimensional flat flow, their ability to enhance overall performance is limited.

Disclosure of Invention

According to the technical problem that the capability of strengthening the comprehensive performance is limited, the novel three-dimensional spiral winding type runner core body of the printed circuit board type heat exchanger is provided. The utility model mainly utilizes a three-dimensional spiral winding type runner printed circuit board type heat exchanger core body, which comprises: the heat exchanger is characterized in that the two sides of the heat exchanger core body are provided with a plurality of metal plates with discontinuous flow channels, a plurality of perforated metal plates and an upper cover plate and a lower cover plate with a plurality of discontinuous flow channels on one side; the heat exchanger core is formed by superposing plates; the upper cover plate and the lower cover plate are overlapped, the perforated metal plate is arranged in the middle of the upper cover plate and the lower cover plate, and the metal plates of the discontinuous flow channels are periodically overlapped; the upper and lower cover plates are directly connected with the perforated metal plate. The metal sheet adopts stainless steel, copper alloy, aluminum alloy, titanium alloy or nickel-based alloy.

Further, a plurality of runners are arranged on both sides of the metal plate of the discontinuous runner, and the runners are machined on the metal plate of the discontinuous runner through an etching process; the flow channels are discontinuous, and one or more diversion flow channels are arranged on both sides of each surface.

Further, the etched cross-sectional shape of the metal plate of the discontinuous flow channel is: any one or a combination of a plurality of semi-circular, rectangular, elliptic and trapezoidal.

Further, the center line of the flow channel is a linear type combination and a curve type combination.

Further, the flow channels are characterized by a parallel periodic arrangement.

Further, the perforations of the perforated metal sheet have the feature of being arranged periodically in parallel.

Further, the perforated metal plate is in the shape of an overlapping area formed by vertical projection of double-sided runners of the runner metal plate.

Further, the upper and lower cover plates are provided with single-sided runners of the metal plate of the discontinuous runner.

Compared with the prior art, the utility model has the following advantages:

1) The device increases the heat exchange area, and the traditional printed circuit board type heat exchanger, whether the traditional printed circuit board type heat exchanger is of a runner type or a fin type, can be regarded as the flow heat exchange of single fluid on a single layer board, and belongs to two-dimensional flow. The novel spiral winding type flow channel printed circuit board type heat exchanger is equivalent to a three-dimensional flow channel, fluid can reach the bottom flow channel of the upper layer of double-sided flow channel plate through the perforation, and then returns to the original flow channel plate along the perforation, so that the heat exchange area is increased and the heat exchange quantity is improved in repeated upper and lower plate interpenetration.

2) The device effectively enhances disturbance, fluid flows in the flow channels on the periodic up-down and plate, is equivalent to a traditional two-dimensional flow channel, and simultaneously increases up-down motion perpendicular to a flow plane, meanwhile, a disturbance increasing mode of traditional plane flow can also act on the flow channel design, and the flow channel design is generally provided with a certain angle, so that the fluid generates a spiral flow form after being overlapped with the up-down motion. The mixing of the fluid is enhanced, the boundary layer of the fluid is continuously destroyed, the field synergistic effect is enhanced, and finally the heat exchange effect is improved. The disturbance flow in the heat exchanger has a self-cleaning effect, can prevent dirt from generating, and plays a role in avoiding blockage of a micro channel.

3) The device eliminates the axial heat conduction effect, and the traditional printed circuit board type heat exchanger has the fluid heat exchange mode limited by downstream, countercurrent, cross flow, serpentine flow and the like. The flow mode of the utility model is winding type flow, the cold fluid and the hot fluid exchange heat on different surfaces of the flow channel plate at the same time, and the cold fluid and the hot fluid are turned over through corresponding perforations. The contact of cold and hot fluid is not generated in the middle, and the flow channel design is more beneficial to the aggravation of the axial heat conduction effect caused by the reduction of the heat conduction performance of metal under the low-temperature working condition, as the cold and hot fluid is mutually inserted in the main flow direction of the flow channel, as seen from the horizontal direction.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic perspective view of a heat exchanger core of the present utility model.

Fig. 2 (a) is a front view of the flow field plate 1 of the heat exchanger core of the present utility model, and (b) is a partial enlarged view.

Fig. 3 shows the back side of the flow field plate 1 of the heat exchanger core according to the utility model.

Fig. 4 (a) is a schematic view of a perforated plate 2 of the heat exchanger core of the present utility model, and (b) is a partial enlarged view.

FIG. 5 is a flow diagram of a set of heat exchange channels according to the present utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-5, the present utility model provides a printed circuit board heat exchanger core with three-dimensional spiral wound flow channels, comprising: and the metal plates are overlapped in multiple layers and welded into a whole through vacuum diffusion welding, and the surfaces of the metal plates are provided with etched flow channels.

Meanwhile, as a preferred embodiment, in the application, the heat exchanger core is provided with a metal plate with a plurality of discontinuous flow channels on two sides, a plurality of perforated metal plates and an upper cover plate and a lower cover plate with a plurality of discontinuous flow channels on one side; the heat exchanger core is formed by superposing plates; the upper cover plate and the lower cover plate are overlapped, the perforated metal plate is arranged in the middle of the upper cover plate and the lower cover plate, and the metal plates of the discontinuous flow channels are periodically overlapped; that is, as shown in fig. 1, the metal plates 1 and 2 are repeatedly stacked in this order, and finally welded to form a core body with periodicity. Preferably, the metal sheet is stainless steel, copper alloy, aluminum alloy, titanium alloy or nickel-based alloy.

Simultaneously, the upper cover plate and the lower cover plate are directly connected with the perforated metal plate.

In this embodiment, a plurality of runners are provided on both sides of the metal plate of the discontinuous runner, and the runners are machined on the metal plate of the discontinuous runner by an etching process; the flow channels are discontinuous, and one or more diversion flow channels are arranged on both sides of each surface. As a preferred embodiment, the number of the diversion channels is designed according to actual engineering requirements, and if a large flow is required for working, the arrangement of the channels must be more, but at the same time, the more channels are not arranged, the better the number of the channels is, and the processing difficulty is increased. The specific choice of the number of flow channels can therefore be chosen according to the actual production requirements.

As a preferred embodiment, the etched cross-sectional shape of the metal plate of the discontinuous flow channel is: any one or a combination of a plurality of semi-circular, rectangular, elliptic and trapezoidal. The central line of the flow channel is a linear type combination and a curve type combination. The drawing shows straight-line type, which is characterized in that the flow channel metal plates are straight-line flow channels inclined at a certain angle, and the curves replace the straight-line flow channels with curves with a certain radian.

The flow channels are characterized by a parallel periodic arrangement. The perforations of the perforated metal sheet 2 are arranged periodically in parallel. As shown in fig. 5, the stacking of the plates forms a spiral winding of two flow channels, one of which is shown in fig. 5. The number of the flow channels is large, so that the whole core body is internally provided with a plurality of heat exchange units in fig. 5, and the heat exchange units are periodically arranged and are parallel to each other.

The perforated metal plate 2 is perforated in the shape of an overlapping area formed by vertical projection of double-sided runners of the runner metal plate 1. The upper and lower cover plates 3 are provided with single-sided runners of the metal plate 1 of the discontinuous runners.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. In the foregoing embodiments of the present utility model, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments. In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (5)

1. A novel printed circuit board heat exchanger core of a three-dimensional spiral wound flow channel, comprising: a metal sheet having etched flow channels on the surface thereof, which is integrally formed by vacuum diffusion welding and is laminated in a plurality of layers, is characterized in that,

the heat exchanger core includes: a metal plate (1) with a plurality of discontinuous flow channels on two sides, a plurality of perforated metal plates (2) and an upper cover plate and a lower cover plate (3) with a plurality of discontinuous flow channels on one side; the heat exchanger core is formed by superposing plates; the upper cover plate (3) and the lower cover plate (3) are overlapped, the perforated metal plate (2) is arranged in the middle of the upper cover plate, and the metal plates (1) of the discontinuous flow channels are periodically overlapped;

the upper and lower cover plates (3) are directly connected with the perforated metal plate (2);

the bottom surface flow channel of the upper layer of double-sided flow channel plate of the heat exchanger core body is returned to the original flow channel plate along the perforation and is inserted into the repeated upper and lower plates;

the two sides of the metal plate (1) of the discontinuous flow channel are provided with a plurality of flow channels, and the flow channels are processed on the metal plate (1) of the discontinuous flow channel through an etching process and a mechanical processing process; the flow channels are discontinuous, and one or more diversion flow channels are arranged on both sides of each surface;

the flow channels are arranged in parallel periodically;

the perforation of the perforated metal plate (2) is in the shape of an overlapping area formed by vertical projection of double-sided runners of the runner metal plate (1);

the bottom flow channel of the upper layer of double-sided flow channel plate of the heat exchanger core body returns to the original flow channel plate along the perforation, and the fluid generates a spiral flow form after overlapping with the up-down movement due to a certain angle of the flow channel design in the repeated upper and lower plate penetration.

2. A novel three-dimensional spiral-wound flow-channel printed circuit board heat exchanger core as described in claim 1, wherein,

the etched cross-sectional shape of the metal plate (1) of the discontinuous flow channel is as follows: any one or a combination of a plurality of semi-circular, rectangular, elliptic and trapezoidal.

3. The novel three-dimensional spiral-wound flow channel printed circuit board heat exchanger core of claim 2, wherein the flow channel center line is a combination of a straight line type and a curved line type.

4. A novel three-dimensional spiral-wound flow-channel printed circuit board heat exchanger core according to claim 1, characterized in that the perforations of the perforated metal sheet (2) are characterized by a parallel periodic arrangement.

5. A novel three-dimensional spiral wound flow channel printed circuit board heat exchanger core according to claim 1, wherein the upper and lower cover plates (3) are provided with single sided flow channels of the discontinuous flow channel metal plate (1).

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