CN108180773A - A kind of interruption fin structure printed circuit board heat exchanger core body - Google Patents
A kind of interruption fin structure printed circuit board heat exchanger core body Download PDFInfo
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- CN108180773A CN108180773A CN201810085586.4A CN201810085586A CN108180773A CN 108180773 A CN108180773 A CN 108180773A CN 201810085586 A CN201810085586 A CN 201810085586A CN 108180773 A CN108180773 A CN 108180773A
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- 238000005192 partition Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000737 periodic effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明公开了一种间断翅片结构印刷电路板式换热器芯体，包括自上到下依次分布的若干高温介质通道及若干低温介质通道，各低温介质通道内及各高温介质通道内均设置有若干行翅片，其中，同一行翅片中相邻两个翅片之间有间隙；各翅片为机翼型翅片或S型翅片，该换热器芯体的传热面积密度小、各流道之间流动分配均匀性好，并且流动阻力损失小。
The invention discloses a core body of a printed circuit board heat exchanger with an intermittent fin structure, which comprises a number of high-temperature medium channels and a number of low-temperature medium channels distributed sequentially from top to bottom. There are several rows of fins, among which, there is a gap between two adjacent fins in the same row of fins; each fin is an airfoil fin or an S-shaped fin, and the heat transfer area density of the heat exchanger core is Small size, good flow distribution uniformity among each flow channel, and small loss of flow resistance.
Description
技术领域technical field
本发明属于换热装置领域，涉及一种间断翅片结构印刷电路板式换热器芯体。The invention belongs to the field of heat exchange devices, and relates to a core body of a printed circuit board heat exchanger with an intermittent fin structure.
背景技术Background technique
印刷电路板式换热器(printed circuit heat exchanger,PCHE)是一种微通道板式换热器，其传热芯体由紧密堆叠的多层金属板片扩散焊接而成。其蚀刻流体微通道的工序与制造印刷电路板的工序相近，故而得名。PCHE具有结构紧凑、热效率高、压损可控、耐高温高压、安全可靠等优点，在制冷空调、石油天然气、核工业、化工工业、电力工业、舰船动力装备等领域应用广泛。Printed circuit heat exchanger (PCHE) is a microchannel plate heat exchanger, the heat transfer core is formed by diffusion welding of closely stacked multilayer metal plates. The process of etching fluid microchannels is similar to the process of manufacturing printed circuit boards, hence the name. PCHE has the advantages of compact structure, high thermal efficiency, controllable pressure loss, high temperature and high pressure resistance, safety and reliability, etc. It is widely used in refrigeration and air conditioning, oil and gas, nuclear industry, chemical industry, electric power industry, ship power equipment and other fields.
目前常见的商用PCHE芯体均采用连续流道结构(直通道、Z字形通道)，其特点是每个流股的流-固交界面连为一体、贯穿始终，众多流股平行并联。连续流道组成的平行流换热器芯体结构简单、易于加工，但其缺点在于：传热面积密度(单位体积换热面积)小；各平行微通道之间流动分配均匀性差；流动阻力损失大。At present, the common commercial PCHE core adopts continuous flow channel structure (straight channel, zigzag channel), which is characterized in that the fluid-solid interface of each stream is connected as a whole, throughout, and many streams are connected in parallel. The core structure of the parallel flow heat exchanger composed of continuous flow channels is simple and easy to process, but its disadvantages are: the heat transfer area density (heat exchange area per unit volume) is small; the flow distribution uniformity between parallel microchannels is poor; the flow resistance loss big.
发明内容Contents of the invention
本发明的目的在于克服上述现有技术的缺点，提供了一种间断翅片结构印刷电路板式换热器芯体，该换热器芯体的传热面积密度小、各流道之间流动分配均匀性好，并且流动阻力损失小。The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a printed circuit board heat exchanger core with intermittent fin structure. The uniformity is good, and the flow resistance loss is small.
为达到上述目的，本发明所述的间断翅片结构印刷电路板式换热器芯体包括自上到下依次分布的若干高温介质通道及若干低温介质通道，各低温介质通道内及各高温介质通道内均设置有若干行翅片，其中，同一行翅片中相邻两个翅片之间有间隙；In order to achieve the above purpose, the core body of the printed circuit board heat exchanger with intermittent fin structure according to the present invention includes a number of high-temperature medium channels and a number of low-temperature medium channels distributed sequentially from top to bottom, each low-temperature medium channel and each high-temperature medium channel Several rows of fins are arranged inside, wherein there is a gap between two adjacent fins in the same row of fins;
各翅片为机翼型翅片或S型翅片。Each fin is an airfoil fin or an S-shaped fin.
高温介质通道内相邻行翅片中的各翅片错列分布。The fins in adjacent rows of fins in the high-temperature medium channel are arranged in a staggered arrangement.
高温介质通道内相邻行翅片中的各翅片相对分布。The fins in adjacent rows of fins in the high-temperature medium channel are relatively distributed.
低温介质通道内相邻行翅片中的各翅片错列分布。The fins in adjacent rows of fins in the low-temperature medium channel are arranged in a staggered arrangement.
低温介质通道内相邻行翅片中的各翅片相对分布。The fins in adjacent rows of fins in the low-temperature medium channel are relatively distributed.
还包括若干自上到下依次分布的隔板，其中，相邻隔板之间形成高温介质通道或低温介质通道。It also includes several baffles distributed sequentially from top to bottom, wherein a high-temperature medium channel or a low-temperature medium channel is formed between adjacent baffles.
本发明具有以下有益效果：The present invention has the following beneficial effects:
本发明所述的间断翅片结构印刷电路板式换热器芯体包括自上到下依次分布的若干高温介质通道及若干低温介质通道，其中，低温介质通道及高温介质通道内均设置有间断分布的若干翅片，相对于传统连续流动结构，本发明中间断分布的翅片的传热面积密度较大；与传统连续流道结构组成的平行换流器相比，本发明中间断分布的翅片形成周期性横向联通的流道，流体的重复的流动及分配，有效的流体提高流动分配的均匀性，进而提高换热器的热效率。另外，本发明中的翅片为机翼型翅片或S型翅片，能够有效抑制流动分离、消除回流及涡旋，提升流体流动分配的均匀性，显著降低流动阻力损失，经试验，本发明的流动阻力损失仅为连续通道结构的1/20～1/4。同时，工质在流通过程中，通过间断的翅片反复冲击热边界层，以抑制热边界层的发展，减小热边界层的厚度，具有强化传热的作用。The core body of the printed circuit board heat exchanger with intermittent fin structure according to the present invention includes a number of high-temperature medium channels and a number of low-temperature medium channels distributed sequentially from top to bottom, wherein the low-temperature medium channels and the high-temperature medium channels are all provided with discontinuous distribution channels. Compared with the traditional continuous flow structure, the heat transfer area density of the intermittently distributed fins in the present invention is larger; compared with the parallel converter composed of the traditional continuous flow channel structure, the intermittently distributed fins in the present invention The sheets form periodic transverse communication flow channels, the repeated flow and distribution of the fluid, and the effective fluid improves the uniformity of the flow distribution, thereby improving the thermal efficiency of the heat exchanger. In addition, the fins in the present invention are wing-shaped fins or S-shaped fins, which can effectively suppress flow separation, eliminate backflow and vortex, improve the uniformity of fluid flow distribution, and significantly reduce flow resistance loss. The flow resistance loss of the invention is only 1/20-1/4 of that of the continuous channel structure. At the same time, during the circulation process, the working fluid repeatedly impacts the thermal boundary layer through the intermittent fins to inhibit the development of the thermal boundary layer, reduce the thickness of the thermal boundary layer, and enhance heat transfer.
附图说明Description of drawings
图1为本发明的结构示意图；Fig. 1 is a structural representation of the present invention;
图2a为本发明中机翼型翅片的结构示意图；Fig. 2 a is the structural representation of airfoil fin among the present invention;
图2b为本发明中S型翅片的结构示意图；Figure 2b is a schematic structural view of S-shaped fins in the present invention;
图3a为本发明中机翼型翅片排列的结构示意图；Fig. 3 a is the structural representation of airfoil fin arrangement among the present invention;
图3b为本发明中S型翅片排列的结构示意图；Fig. 3b is a structural schematic diagram of S-shaped fin arrangement in the present invention;
图4a为本发明中机翼型翅片顺列布置示意图；Figure 4a is a schematic diagram of the arrangement of airfoil fins in the present invention;
图4b为本发明中机翼型翅片错列布置示意图；Figure 4b is a schematic diagram of the staggered arrangement of airfoil fins in the present invention;
图5a为本发明中S型翅片顺列布置示意图；Figure 5a is a schematic diagram of the arrangement of S-shaped fins in the present invention;
图5b为本发明中S型翅片错列布置示意图。Fig. 5b is a schematic diagram of the staggered arrangement of S-shaped fins in the present invention.
其中，1为高温介质通道、2为低温介质通道、3为隔板。Among them, 1 is a high-temperature medium channel, 2 is a low-temperature medium channel, and 3 is a partition.
具体实施方式Detailed ways
下面结合附图对本发明做进一步详细描述：The present invention is described in further detail below in conjunction with accompanying drawing:
参考图1，本发明所述的间断翅片结构印刷电路板式换热器芯体包括自上到下依次分布的若干高温介质通道1及若干低温介质通道2，各低温介质通道2内及各高温介质通道1内均设置有若干行翅片，其中，同一行翅片中相邻两个翅片之间有间隙；各翅片为机翼型翅片或S型翅片。Referring to Fig. 1, the core body of the printed circuit board heat exchanger with intermittent fin structure according to the present invention includes a number of high-temperature medium channels 1 and a number of low-temperature medium channels 2 distributed sequentially from top to bottom, each low-temperature medium channel 2 and each high-temperature medium channel Several rows of fins are arranged in the medium channel 1, wherein there is a gap between two adjacent fins in the same row; each fin is an airfoil-shaped fin or an S-shaped fin.
高温介质通道1内相邻行翅片中的各翅片错列分布，或者高温介质通道1内相邻行翅片中的各翅片相对分布；低温介质通道2内相邻行翅片中的各翅片错列分布，或者低温介质通道2内相邻行翅片中的各翅片相对分布；本发明还包括若干自上到下依次分布的隔板3，其中，相邻隔板3之间形成高温介质通道1或低温介质通道2，隔板3为金属平板。The fins in the adjacent rows of fins in the high-temperature medium channel 1 are distributed in staggered rows, or the fins in the adjacent rows of fins in the high-temperature medium channel 1 are relatively distributed; the fins in the adjacent rows of fins in the low-temperature medium channel 2 The fins are staggered, or the fins in adjacent rows of fins in the low-temperature medium channel 2 are relatively distributed; A high-temperature medium channel 1 or a low-temperature medium channel 2 is formed between them, and the separator 3 is a metal plate.
在使用时，流体介质沿翅片之间的空隙流动，各翅片为机翼型翅片或S型翅片，其中，机翼型翅片的形线采用对称翼型结构，S型翅片的形线由圆弧及直线段组成。机翼型翅片与S型翅片的传热面积密度大小相当，机翼型翅片对流动分离、回流、涡旋的抑制作用更强，因此机翼型翅片的流动阻力损失相对较小、传热性能相对略差，而S型翅片的流动阻力损失相对较大、传热性能相对较优。When in use, the fluid medium flows along the gaps between the fins. Each fin is an airfoil fin or an S-shaped fin. The shape of the airfoil-shaped fin adopts a symmetrical airfoil structure. The S-shaped fin The shape line consists of arcs and straight line segments. The heat transfer area density of airfoil fins and S-shaped fins is similar, and the airfoil fins have a stronger inhibitory effect on flow separation, backflow, and vortex, so the flow resistance loss of airfoil fins is relatively small , The heat transfer performance is relatively poor, while the flow resistance loss of the S-shaped fin is relatively large, and the heat transfer performance is relatively good.
机翼型翅片的形线结构由弦长a、最大厚度b、最大厚度位置xb、前缘半径r1及后缘角α确定；S型翅片的形线结构由圆弧半径R1、圆弧半径R2、弧心角θ1、弧心角θ2、倾角β、厚度c、长度d及高度e确定。在实际操作中，通过调整翅片的上述几何参数的大小可以改变翅片的表面积及翅片间的空隙形状，从而满足不同设计参数的要求。The shape line structure of the airfoil fin is determined by the chord length a, the maximum thickness b, the maximum thickness position x b , the leading edge radius r 1 and the trailing edge angle α; the shape line structure of the S-shaped fin is determined by the arc radius R 1 , arc radius R 2 , arc center angle θ 1 , arc center angle θ 2 , inclination β, thickness c, length d and height e are determined. In actual operation, the surface area of the fins and the shape of the gap between the fins can be changed by adjusting the above geometric parameters of the fins, so as to meet the requirements of different design parameters.
机翼型翅片的排列结构由纵向间距lx及横向间距ly确定，S型翅片的排列结构由纵向间距Lx、横向间距Ly确定。通过调整翅片间距的大小可以改变翅片排布密度，从而改变翅片数量、翅片间空隙大小，以满足不同设计参数的要求。The arrangement structure of the airfoil fins is determined by the longitudinal spacing lx and the transverse spacing ly , and the arrangement structure of the S-shaped fins is determined by the longitudinal spacing Lx and the transverse spacing Ly . By adjusting the size of the fin spacing, the arrangement density of the fins can be changed, thereby changing the number of fins and the size of the gap between the fins to meet the requirements of different design parameters.
高温介质通道1中的翅片与低温介质通道2中的翅片相互平行或相互垂直；当高温介质通道1中的翅片与低温介质通道2中的翅片相互平行时，高温介质通道1及低温介质通道2中的介质通过逆流或顺流进行换热，当高温介质通道1中的翅片与低温介质通道2中的翅片相互垂直时，高温介质通道1及低温介质通道2中的介质通过交错流动进行换热。The fins in the high-temperature medium channel 1 and the fins in the low-temperature medium channel 2 are parallel or perpendicular to each other; when the fins in the high-temperature medium channel 1 and the fins in the low-temperature medium channel 2 are parallel to each other, the high-temperature medium channel 1 and the The medium in the low-temperature medium channel 2 exchanges heat through countercurrent or downstream flow. When the fins in the high-temperature medium channel 1 and the fins in the low-temperature medium channel 2 are perpendicular to each other, the medium in the high-temperature medium channel 1 and the low-temperature medium channel 2 Heat exchange by means of interleaved flow.
另外，相邻两个高温介质通道1之间可以布置一个或者多个低温介质通道2，同理，相邻两个低温介质通道2之间可以布置一个或者多个高温介质通道1。In addition, one or more low-temperature medium channels 2 may be arranged between two adjacent high-temperature medium channels 1 , and similarly, one or more high-temperature medium channels 1 may be arranged between two adjacent low-temperature medium channels 2 .
以上详细说明仅为本发明的较佳实施例，不能以此限定本发明的范围。即凡是依据本发明申请专利范围所作的均等变化与修饰，皆应属于本发明专利涵盖的范围之内。The above detailed description is only a preferred embodiment of the present invention, and should not limit the scope of the present invention. That is, all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.
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| CN109632272A (en) * | 2018-11-23 | 2019-04-16 | 合肥通用机械研究院有限公司 | A kind of PCHE core structure of heat exchanger design experiment model machine |
| CN109855436A (en) * | 2019-02-27 | 2019-06-07 | 西安交通大学 | The bionical micro-channel condenser of swordfish shuttle-type-inclined groove |
| CN109990640A (en) * | 2019-03-12 | 2019-07-09 | 西安交通大学 | A heat exchange plate with a slotted streamline rib structure |
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