Printed circuit board type heat exchanger core body with staggered winding type flow channels
By using an interlaced winding flow channel design, fluid turbulence is enhanced, solving the problem of the single flow state in traditional printed circuit board heat exchangers, and achieving more efficient heat exchange and equipment economy.
Patent Information
- Application Number
- CN202521009198.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-05-21
AI Technical Summary
Traditional cross-flow printed circuit board heat exchangers have a relatively simple flow state and weak disturbance, resulting in limited ability to comprehensively optimize heat exchange performance and flow resistance. They are also large in size, have poor economic efficiency, and their heat exchange efficiency needs to be improved.
The design employs an interlaced winding flow channel, which forms a three-dimensional flow channel through the stacking of multiple metal plates, where hot and cold fluids intertwine and entwine. This enhances fluid disturbance, disrupts the boundary layer, strengthens heat exchange, and is then integrated into a single structure via vacuum diffusion welding.
It improves heat exchange efficiency, reduces fouling, lowers cleaning frequency, and enhances the economy and heat exchange performance of the equipment.
Smart Images
Figure CN224246840U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of heat exchange devices, and more particularly to a printed circuit board type heat exchanger core with interlaced winding flow channels. Background Technology
[0002] Printed Circuit Heat Exchanger (PCHE) is a new type of high-efficiency heat exchange equipment with advantages such as high compactness, good heat exchange performance, and good operation under extreme high temperature and high pressure. It is gradually being used in the energy industry, such as vaporization heat exchangers for liquefied natural gas, high and low temperature regenerators for supercritical carbon dioxide power generation, and intercoolers for nuclear reactors.
[0003] The fluid channels of the PCHE are etched into the heat exchange plates using a mechanical photoelectrochemical etching process, creating micro-channels. The different plates are then welded together to form the heat exchange core using vacuum diffusion welding technology. The flow channel types of the PCHE are mainly straight channel, Z-channel, S-channel, and airfoil fin type. Among them, the flow modes of the straight channel are mainly co-current, counter-current, and cross-flow.
[0004] Traditional cross-flow channel designs can typically be approximated as a two-dimensional flat plate flow model. Under this model, the fluid flow state is relatively simple, and the degree of disturbance is weak. Therefore, its ability to comprehensively optimize heat transfer performance and flow resistance is limited. Cross-flow heat exchangers have a smaller logarithmic mean temperature difference, resulting in a larger cross-flow heat transfer area requirement, larger equipment size, poorer economic efficiency, and the need for further improvement in heat transfer efficiency. Utility Model Content
[0005] In view of the technical problems mentioned in the background art above, a printed circuit board heat exchanger core with interlaced winding flow channels is provided.
[0006] The technical means adopted in this utility model are as follows:
[0007] A printed circuit board type heat exchanger core with interlaced winding flow channels includes: a metal plate with etched flow channels on the surface, which is made of multiple layers of metal plates stacked together and welded together by vacuum diffusion welding.
[0008] The heat exchanger core includes: an upper cover plate with several discontinuous flow channels, a lower cover plate with several discontinuous flow channels, and a perforated metal plate with several discontinuous flow channels on both sides; the upper cover plate with several discontinuous flow channels, the perforated metal plate with discontinuous flow channels on both sides, and the lower cover plate are periodically stacked in the order of upper cover plate-perforated metal plate-lower cover plate to form a three-dimensional flow channel in which hot and cold fluids intertwine and entwine in a woven pattern.
[0009] Furthermore, the flow channels of the upper cover plate having several discontinuous flow channels and the lower cover plate having several discontinuous flow channels are arranged in an alternating manner.
[0010] Furthermore, the arrangement of the flow channels on the upper surface of the perforated metal plate with several discontinuous flow channels on both sides is the same as the arrangement of the flow channels on the upper cover plate with several discontinuous flow channels, and the arrangement of the flow channels on the lower surface of the perforated metal plate with several discontinuous flow channels on both sides is the same as the arrangement of the flow channels on the lower cover plate with several discontinuous flow channels.
[0011] Furthermore, the cross-sectional shape of the flow channels of the upper cover plate with several discontinuous flow channels, the lower cover plate with several discontinuous flow channels, and the perforated metal plate with several discontinuous flow channels on both sides is any one or more combinations of semi-circular, rectangular, elliptical, and trapezoidal shapes.
[0012] Furthermore, the flow channels of the upper cover plate with several discontinuous flow channels, the lower cover plate with several discontinuous flow channels, and the perforated metal plate with several discontinuous flow channels on both sides are arranged in a parallel periodic pattern in both the transverse and longitudinal directions.
[0013] Furthermore, the flow channels and perforations of the perforated metal plate with several discontinuous flow channels on both sides are parallel and periodically arranged.
[0014] Furthermore, the perforations of the perforated metal plate with several discontinuous flow channels on both sides and the vertical projections of the flow channels of the upper cover plate with several discontinuous flow channels and the lower cover plate with several discontinuous flow channels all form the shape of the overlapping area.
[0015] Compared with the prior art, the present invention has the following advantages:
[0016] 1) This invention effectively enhances turbulence, allowing the fluid to flow periodically up and down within the channels on the plate. This is equivalent to adding vertical movement perpendicular to the flow plane to a traditional two-dimensional flow printed circuit board heat exchanger. Furthermore, due to the periodic interweaving and entanglement of the hot and cold fluids, the two fluids form an interlaced flow pattern. During the flow and heat exchange process, the boundary layer of the fluid is continuously disrupted, strengthening the field synergy effect and improving the heat exchange efficiency.
[0017] 2) The turbulent flow inside the heat exchanger has a self-cleaning effect, which can reduce the generation of dirt and reduce the cleaning frequency. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional schematic diagram of the heat exchanger core of this utility model;
[0020] Figure 2 The back side of the upper cover plate with several discontinuous flow channels of the heat exchanger core of this utility model;
[0021] Figure 3 This is the front of the lower cover plate of the heat exchanger core of this utility model, which has several discontinuous flow channels.
[0022] Figure 4(a) is a three-dimensional schematic diagram of a perforated metal plate with several discontinuous flow channels on both sides of the heat exchanger core of this utility model.
[0023] Figure 4(b) is a front view of the perforated metal plate with several discontinuous flow channels on both sides of the heat exchanger core of this utility model.
[0024] Figure 4(c) is a partial enlarged view of the perforated metal plate with several discontinuous flow channels on both sides of the heat exchanger core of this utility model.
[0025] Figure 4(d) is a schematic diagram of the back of a perforated metal plate with several discontinuous flow channels on both sides of the heat exchanger core of this utility model.
[0026] Figure 5 This is a schematic diagram of the flow path of the heat exchange channel unit of this utility model.
[0027] Among them, 1 is an upper cover plate with several discontinuous flow channels; 2 is a lower cover plate with several discontinuous flow channels; and 3 is a perforated metal plate with several discontinuous flow channels on both sides. Detailed Implementation
[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0032] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0035] like Figure 1-5 As shown, this utility model provides a printed circuit board heat exchanger core with interlaced winding flow channels, comprising: multi-layered metal plates with flow channels on the surface, which are integrally welded together by vacuum diffusion welding.
[0036] Meanwhile, as a preferred embodiment, in this application, the heat exchanger core has an upper cover plate with several discontinuous flow channels, a lower cover plate with several discontinuous flow channels, and a perforated metal plate with several discontinuous flow channels on both sides; the combination of the upper and lower cover plates with several discontinuous flow channels and the perforated metal plate with discontinuous flow channels is periodically superimposed, that is, according to... Figure 1 As shown, a unit is formed by stacking a lower cover plate with several discontinuous flow channels, a perforated metal plate with several discontinuous flow channels on both sides, and an upper cover plate with several discontinuous flow channels in sequence. Finally, multiple units are stacked and diffused welded to form a whole core.
[0037] In this embodiment, the upper cover plate with discontinuous flow channels and the perforated metal plate with discontinuous flow channels on both sides are provided with a plurality of flow channels. The flow channels are processed onto the metal plate with discontinuous flow channels by etching or machining. The flow channels of the perforated metal plate with discontinuous flow channels are arranged in an alternating manner on the upper and lower sides. The flow channels are discontinuous, and one or more guide channels are provided around each side.
[0038] As a preferred implementation, the number of flow channels should be designed according to actual engineering needs. For example, under high flow conditions, more channels should be arranged. However, more channels are not necessarily better, as increasing the number of channels will increase the processing difficulty. Therefore, the specific selection of the number of channels can be made according to actual production needs.
[0039] In a preferred embodiment, the cross-sectional shape of the discontinuous flow channel metal plate is any combination of one or more of the following: semi-circular, rectangular, elliptical, and trapezoidal. The attached drawings show an elliptical shape, where each flow channel metal plate has a half-elliptical cross-sectional shape, and two metal plates merge into a complete ellipse. The centerline of the flow channel can be a combination of straight lines and curves. The attached drawings show a straight line type, where all flow channel metal plates are straight channels; the curved type replaces these straight channels with curves of a certain degree of curvature.
[0040] In a preferred embodiment, the flow channels in this application are characterized by a parallel and periodic arrangement of both hot and cold flow channels. The hot and cold flow channels and perforations of the perforated metal plate 3 with discontinuous flow channels on both sides are arranged in a parallel and periodic manner, as shown in Figure 4(b) on the front side and Figure 4(d) on the back side. The stacking of plates creates an interlaced arrangement of hot and cold flow channels. Figure 5 This refers to one of the units. The entire heat exchanger core is composed of several such units stacked periodically, and each unit is parallel to the others.
[0041] Preferably, the flow channels on the upper surface of the perforated metal plate 3 with discontinuous flow channels are arranged in the same way as the flow channels on the upper cover plate 1 with discontinuous flow channels, and the flow channels on the lower surface of the perforated metal plate 3 with discontinuous flow channels are arranged in the same way as the flow channels on the lower cover plate 2 with discontinuous flow channels. The perforation is the shape of the overlapping area formed by the vertical projection of the flow channels of the upper cover plate 1 and the lower cover plate 2 with discontinuous flow channels.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A printed circuit board heat exchanger core with an interlaced winding flow channel, comprising: A multi-layered metal plate, welded together by vacuum diffusion welding, has etched flow channels on its surface, characterized in that... The heat exchanger core includes: an upper cover plate (1) with several discontinuous flow channels, a lower cover plate (2) with several discontinuous flow channels, and a perforated metal plate (3) with several discontinuous flow channels on both sides; the upper cover plate (1) with several discontinuous flow channels, the perforated metal plate (3) with discontinuous flow channels on both sides, and the lower cover plate (2) are periodically superimposed in the order of upper cover plate (1) - perforated metal plate (3) - lower cover plate (2) to form a three-dimensional flow channel in which hot and cold fluids intertwine and entwine in a woven pattern.
2. The printed circuit board heat exchanger core with interlaced winding flow channels according to claim 1, characterized in that, The upper cover plate (1) with several discontinuous flow channels and the lower cover plate (2) with several discontinuous flow channels are arranged in an alternating manner.
3. The printed circuit board heat exchanger core with interlaced winding flow channels according to claim 1, characterized in that, The arrangement of the flow channels on the upper surface of the perforated metal plate (3) with several discontinuous flow channels on both sides is the same as that of the upper cover plate (1) with several discontinuous flow channels. The arrangement of the flow channels on the lower surface of the perforated metal plate (3) with several discontinuous flow channels on both sides is the same as that of the lower cover plate (2) with several discontinuous flow channels.
4. A printed circuit board heat exchanger core with an interlaced winding flow channel as described in claim 1 or 3, characterized in that, The cross-sectional shape of the flow channels of the upper cover plate (1) with several discontinuous flow channels, the lower cover plate (2) with several discontinuous flow channels, and the perforated metal plate (3) with several discontinuous flow channels on both sides is any one or more of the following: semi-circular, rectangular, elliptical, and trapezoidal.
5. A printed circuit board heat exchanger core with an interlaced winding flow channel according to any one of claims 1, 3, or 4, characterized in that, The channels of the upper cover plate (1) with several discontinuous channels, the lower cover plate (2) with several discontinuous channels, and the perforated metal plate (3) with several discontinuous channels on both sides are arranged in a parallel periodic pattern in both the transverse and longitudinal directions.
6. The printed circuit board heat exchanger core with interlaced winding flow channels according to claim 1, characterized in that, The channels and perforations of the perforated metal plate (3) with several discontinuous flow channels on both sides are parallel and periodically arranged.
7. The printed circuit board heat exchanger core with interlaced winding flow channels according to claim 1, characterized in that, The perforations of the perforated metal plate (3) with several discontinuous flow channels on both sides and the vertical projections of the flow channels of the upper cover plate (1) with several discontinuous flow channels and the lower cover plate (2) with several discontinuous flow channels form an overlapping area shape.