CN116642353B - Current collecting structure, heat exchange core and heat exchanger - Google Patents
Current collecting structure, heat exchange core and heat exchanger Download PDFInfo
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- CN116642353B CN116642353B CN202310906692.5A CN202310906692A CN116642353B CN 116642353 B CN116642353 B CN 116642353B CN 202310906692 A CN202310906692 A CN 202310906692A CN 116642353 B CN116642353 B CN 116642353B
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- heat exchange
- current collecting
- exchange core
- flow channel
- collecting structure
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- 239000012530 fluid Substances 0.000 claims description 50
- 238000004891 communication Methods 0.000 claims description 42
- 238000003466 welding Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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
- F28D9/04—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 the conduits being formed by spirally-wound plates or laminae
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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
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
- F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a flow collecting structure, a heat exchange core body and a heat exchanger, and relates to the technical field of heat exchangers. The current collecting structure, the heat exchange core and the heat exchanger provided by the invention enable the heat exchange core and the heat exchanger to be more compact and more compact.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a current collecting structure, a heat exchange core body and a heat exchanger.
Background
A printed circuit board heat exchanger (PCHE) is a compact heat exchanger that is fabricated by microchannel etch forming techniques and diffusion welding techniques. The microchannel etching forming technology gives the advantages of compact volume and high heat exchange efficiency to the heat exchanger, and the diffusion welding technology makes the metal atoms of the welding surface mutually diffuse, so that the welding effect with extremely high structural strength is realized. Therefore, the heat exchanger has great potential in the fields of solar energy utilization, nuclear energy utilization and hydrogen production. As shown in fig. 1 and 2, a typical PCHE mainly comprises a multi-layer heat exchange plate 1, a fixed plate 2 and an external current collector 3, wherein the multi-layer heat exchange plate 1 and the fixed plate 2 form a PCHE main body part, the main body part of the heat exchanger is welded and formed by vacuum diffusion welding equipment, and then the main body part of the heat exchanger is welded with the external current collector by conventional argon arc welding. The upper limit of the thickness of the PCHE body part, in other words, the upper limit of the number of heat exchanging fins/heat exchanging area is basically determined by the limit of the height dimension of the temperature zone of the vacuum diffusion welding equipment. However, under certain heat exchange working conditions, the heat exchange quantity requirement is larger, the PCHE heat exchanger with a single module is limited by the heat exchange area, and the requirements are difficult to meet, so that the multi-module PCHE becomes a realistic and feasible solution.
As shown in fig. 3 and 4, a typical multi-module PCHE is formed by arranging a plurality of multi-layer heat exchanger plates 1 in parallel and closing the inlet and outlet by an integral external current collector 4. However, the structural design has a disadvantage that a pressure test before assembly cannot be performed on a single module, and if a certain module leaks after the parallel welding of multiple modules, the whole multi-module PCHE cannot be used, and even needs to be scrapped. If the split external current collector is adopted, the pressure test of a single module can be realized, the pressure resistance of the molded multi-module heat exchanger is ensured to be qualified, but another problem is brought: i.e. a fixed plate 2 having a thickness comparable to the wall thickness of the split current collector is provided between the individual modules. For PCHE in service under high temperature and high pressure working conditions, the large-volume current collector often needs a large wall thickness to meet the requirement of structural strength, so that the thickness of the fixing plate 2 is thicker, the thickness of the multi-layer heat exchange plate 1 is severely limited due to the fact that the upper limit of the total thickness of a single module is defined, the heat exchange area of the PCHE is reduced, and in addition, the material cost of the split current collector with a large number is greatly increased. Therefore, how to optimize/avoid the pressure test problem and the heat exchange plate reduction problem caused by the two structures through the PCHE structure design becomes a key problem to be solved by the multi-module PCHE, and the problem is embodied in how to realize the miniaturization of the split type current collector through the structure optimization.
In view of this, the present inventors have devised a current collecting structure, a heat exchanging core and a heat exchanger through trial and error based on production design experience in the field and related fields for many years, so as to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a flow collecting structure, a heat exchange core body and a heat exchanger, so that the heat exchange core body and the heat exchanger are smaller and more compact.
In order to achieve the above purpose, the invention provides a current collecting structure which is arranged on a heat exchange core body, wherein the heat exchange core body is formed by welding a plurality of heat exchange plates which are arranged in a stacked manner, the current collecting structure comprises a plurality of communication flow passages, at least one current collecting opening and at least one current collecting cover, the current collecting opening is arranged on the side wall of the heat exchange core body, a part of the side edges of the heat exchange plates are provided with notches, the notches are sequentially connected to form the current collecting opening, the rest of the heat exchange plates are provided with a plurality of communication holes which are in alignment fit with the notches, the communication holes are sequentially arranged at intervals along the side edges of the heat exchange plates, the communication holes of the heat exchange core bodies are in alignment fit and are communicated to form the communication flow passages, and the communication flow passages are communicated with the current collecting opening, and the current collecting cover is arranged at the current collecting opening and is in sealing connection with the side wall of the heat exchange plates positioned outside the current collecting opening.
The invention also provides a heat exchange core body, wherein the heat exchange core body comprises two bearing plates and a plurality of heat exchange plates, the heat exchange plates are arranged between the two bearing plates in a lamination direction, a first micro-flow channel is arranged on a first number of the heat exchange plates, a second micro-flow channel is arranged on a second number of the heat exchange plates, two ends of the first micro-flow channels are respectively communicated with a fluid pipeline through a first flow collecting structure and a second flow collecting structure, two ends of the second micro-flow channel are respectively communicated with the fluid pipeline through a third flow collecting structure and a fourth flow collecting structure, and the first flow collecting structure, the second flow collecting structure, the third flow collecting structure and the fourth flow collecting structure are all of the flow collecting structures.
The invention also proposes a heat exchanger, wherein the heat exchanger comprises at least one heat exchange core as described above.
Compared with the prior art, the invention has the following characteristics and advantages:
according to the current collecting structure, the heat exchange core and the heat exchanger, the plurality of connecting holes and the plurality of gaps on the heat exchange plates are utilized to form the partial current collecting structure, and the heat exchange core with the partial current collecting function is formed by stacking and diffusion welding of the plurality of heat exchange plates, so that no external large-sized current collector is needed, and the heat exchange core and the heat exchanger are more compact and more compact.
Drawings
In order to more clearly illustrate the embodiments of the invention 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, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
the drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.
FIG. 1 is a schematic diagram of a typical PCHE structure in the prior art;
FIG. 2 is a schematic diagram of a typical PCHE connection of the prior art;
FIG. 3 is a schematic diagram of a multi-module PCHE employing an integral current collector in the prior art;
FIG. 4 is a schematic diagram of a multi-module PCHE architecture employing a split current collector in the prior art;
FIG. 5 is a schematic view of a single heat exchange core according to the present invention;
fig. 6 is a schematic diagram of a split structure of a current collecting structure according to the present invention;
FIG. 7 is a schematic view of an end collecting port on a heat exchange core according to the present invention;
FIG. 8 is a schematic view of another end of the heat collecting port on the heat exchange core according to the present invention;
FIG. 9 is a schematic flow chart of a cold and hot fluid in a heat exchange core according to the present invention;
FIG. 10 is a schematic view of a first heat exchanger plate structure;
FIG. 11 is a schematic view of a second heat exchanger plate structure;
FIG. 12 is a schematic view of a third heat exchanger plate structure;
FIG. 13 is a schematic view of a fourth heat exchanger plate structure;
FIG. 14 is a schematic view of a heat exchanger according to the present invention;
fig. 15 is a schematic view of another structure of a heat exchanger according to the present invention.
Reference numerals illustrate:
the prior art comprises the following steps:
1. a multi-layer heat exchange plate; 2. a fixing plate; 3. externally connected with a current collector; 4. an integral external current collector.
The invention comprises the following steps:
10. a current collecting structure; 11. the communicating flow passage; 12. a collecting port; 13. a manifold cover; 131. a fluid conduit;
20. a heat exchange core; 21. a heat exchange plate; 212. a communication hole; 213. a notch; 214. lacing wires; 215. a first microchannel; 216. a first connecting flow passage; 217. a second microchannel; 218. a second connecting flow passage; 22. a pressure bearing plate;
30. a first heat exchange plate; 31. a second heat exchange plate; 32. a third heat exchange plate; 33. a fourth heat exchange plate;
40. a first current collecting structure; 41. a second current collecting structure; 42. a third current collecting structure; 43. a fourth current collecting structure;
50. a heat exchanger.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Embodiment one:
as shown in fig. 5 and 6, the present invention provides a current collecting structure 10 disposed on a heat exchange core 20, where the heat exchange core 20 is formed by welding a plurality of heat exchange plates 21 disposed in a stacked manner, the current collecting structure 10 includes a plurality of communication channels 11, at least one current collecting port 12 and at least one current collecting cover 13, the current collecting port 12 is disposed on a side wall of the heat exchange core 20, a notch 213 is disposed on a side edge of a part of the heat exchange plates 21, the plurality of notches 213 are sequentially connected to form the current collecting port 12, a plurality of communication holes 212 aligned with the notches 213 are disposed on the rest of the heat exchange plates 21, the plurality of communication holes 212 are sequentially disposed at intervals along the side edge of the heat exchange plates 21, the communication holes 212 of each heat exchange plate 21 are aligned and connected to form a communication channel 11, the communication channel 11 is communicated with the current collecting port 12, and the current collecting cover 13 is disposed at the current collecting port 12 and is hermetically connected with the side wall of the heat exchange plate 21 disposed outside the current collecting port 12.
The current collecting structure 10 provided by the invention forms a part of the current collecting structure 10 by utilizing the plurality of communication holes 212 and the plurality of notches 213 on the heat exchange plates 21, and forms the heat exchange core 20 with a part of current collecting function by stacking and diffusion welding the plurality of heat exchange plates 21, so that no external large-sized current collector is needed, and the heat exchange core 20 is more compact and more compact.
Specifically, as shown in fig. 5 and 6, the current collecting structure 10 of the present invention is disposed on the heat exchange core 20, and is used for dispersing external fluid onto the multi-layer heat exchange plate 21 in the heat exchange core 20 or converging the fluid on the multi-layer heat exchange plate 21 into the current collecting structure 10, and compared with a conventional external current collector, a part of the structure of the current collecting structure 10 of the present invention is integrally formed on the multi-layer heat exchange plate 21, and the structure is simpler. As shown in fig. 5 and 6, the heat exchange core 20 includes a plurality of heat exchange plates 21 stacked together, wherein a portion of the heat exchange plates 21 have notches 213 formed at their sides, and the heat exchange plates 21 having notches 213 are stacked together in sequence to form a current collecting port 12 having a groove-like structure on the side of the heat exchange core 20; the side of the heat exchange plate 21 without the notch 213 is provided with a plurality of communication holes 212 corresponding to the notch 213, and the communication holes 212 on the heat exchange plates 21 stacked together are overlapped up and down to form a communication runner 11 extending along the stacking direction of the heat exchange plates 21, wherein the communication runner 11 corresponds to the current collecting port 12 and is communicated with the current collecting port 12. Thus, the fluid entering the collecting port 12 can enter each layer of heat exchange plates 21 stacked together through the communication flow passage 11, and the fluid in each layer of heat exchange plates 21 can also be collected at the collecting port 12 through the communication flow passage 11.
Further, as shown in fig. 5, a collector cover 13 is covered on the outside of the collector opening 12 of the collector structure 10, the collector cover 13 is fixed on the side wall of the heat exchange core 20 (formed by the multi-layer heat exchange plates 21) and is connected with the heat exchange plates 21 in a sealing manner, a fluid pipe 131 is arranged on the collector cover 13 in a penetrating manner, and the fluid pipe 131 is communicated with the collector opening 12 of the collector structure 10. In this way, fluid can be fed into the manifold 12 through the fluid conduit 131 or fluid in the manifold 12 can be discharged through the fluid conduit 131.
Embodiment two:
the present invention further proposes a heat exchange core 20, as shown in fig. 5 and fig. 7 to fig. 13, where the heat exchange core 20 includes two pressure bearing plates 22 and a plurality of heat exchange plates 21, the plurality of heat exchange plates 21 are stacked between the two pressure bearing plates 22, a first micro-channel 215 is formed on a first heat exchange plate 21 along a stacking direction, a second micro-channel 217 is formed on a second heat exchange plate 21, two ends of the first micro-channel 215 are respectively communicated with the fluid pipeline 131 through a first current collecting structure 40 and a second current collecting structure 41, and two ends of the second micro-channel 217 are respectively communicated with the fluid pipeline 131 through a third current collecting structure 42 and a fourth current collecting structure 43, where the first current collecting structure 40, the second current collecting structure 41, the third current collecting structure 42 and the fourth current collecting structure 43 are all the current collecting structures 10 as described in the first embodiment.
According to the heat exchange core 20 provided by the invention, the collector cover 13 is in sealing connection with the side wall of the heat exchange plate 21, but not in sealing connection with the bearing plate 22 of the heat exchange core 20, so that the thickness of the bearing plate 22 is not required to be considered, the influence of the thickness of the externally connected collector cover 13 is only required to be considered from the perspective of mechanical structural strength, the thickness of the bearing plate 22 can be greatly reduced, and therefore, the number of the heat exchange plates 21 can be greatly increased and the heat exchange area can be obviously improved for the heat exchange core 20 with limited total thickness, and the volume size of the heat exchanger 50 under the same working condition is further reduced. Meanwhile, the collecting cover 13 only needs to be covered outside the collecting port 12, and does not need to cross the heat exchange core 20 in the vertical direction (the direction perpendicular to the heat exchange plate 21 and the pressure bearing plate 22), so that the volume of the collecting cover 13 is further reduced.
Specifically, a first current collecting structure 40 and a second current collecting structure 41 are respectively connected to two ends of the first micro flow channel 215, and a third current collecting structure 42 and a fourth current collecting structure 43 are respectively connected to two ends of the second micro flow channel 217. As shown in fig. 5, 7 and 8, wherein fig. 7 and 8 respectively show the structure of the heat exchange core 20 in opposite directions, the dashed arrows in the drawing indicate the flow direction of the first fluid in the first micro flow channels 215, and it can be seen that the first fluid is collected from the end surface of the heat exchange core 20 into each first micro flow channel 215 in the heat exchange core 20 through the first collecting structure 40 for heat exchange, and the first fluid after heat exchange flows out of the heat exchange core 20 from the other end of the first micro flow channel 215 through the second collecting structure 41. The solid arrows indicate the flow direction of the second fluid, the second fluid is distributed from the side surface of the heat exchange core 20 through a third flow collecting structure 42 and then enters each second micro flow channel 217 inside the heat exchange core 20 to exchange heat, and the second fluid after completing the heat exchange flows out of the heat exchange core 20 from the other end of the second micro flow channel 217 through a fourth flow collecting structure 43.
In an alternative embodiment of the present invention, as shown in fig. 5, 7 and 8, the structure of the heat exchange core 20 is shown, in which two first current collecting structures 40 are inlets for the first fluid, one second current collecting structure 41 is an outlet for the first fluid, one third current collecting structure 42 is an inlet for the second fluid, and two fourth current collecting structures 43 are outlets for the second fluid. As can be seen from the drawing, the first fluid flows into the heat exchange core 20 through two first collecting structures 40 distributed on the upper and lower sides of the heat exchange core 20, and flows out through a second collecting structure 41 which is slightly larger and distributed on the middle of the heat exchange core 20 in the vertical direction. The second fluid, on the contrary, flows in from a third collecting structure 42 located at the side of the heat exchange core 20 and located at the middle in the vertical direction, and flows out from two fourth collecting structures 43 distributed at the upper and lower sides of the side of the heat exchange core 20.
In an alternative embodiment of the present invention, as shown in fig. 9 to 13, a plurality of first micro flow channels 215 are formed on a first heat exchange plate 21 in parallel, and on the heat exchange plate 21, one end of each first micro flow channel 215 is connected to a communication hole 212 or a notch 213 of the first current collecting structure 40 through a first connection flow channel 216, and the other end of each first micro flow channel 215 is connected to a communication hole 212 or a notch 213 of the second current collecting structure 41 through a first connection flow channel 216. As shown in fig. 6, it can be seen that by the smart arrangement of the first manifold structure 40, the first fluid entering the manifold 12 is split into three streams: one fluid horizontally flows into the first micro-flow channel 215 connected with the notch 213, and the other two fluids respectively flow to the upper and lower heat exchange plates 21 through the communicating channels 11 and then enter the first micro-flow channel 215 connected with the communicating holes 212 so as to meet the flow requirement of the whole heat exchange core 20; through the converging action of the communicating channels 11, the first fluid exchanges heat and then enters the second collecting structure 41.
In an alternative embodiment of the present invention, as shown in fig. 9 to 13, a plurality of second micro flow channels 217 are formed on the second heat exchange plates 21, and one end of each second micro flow channel 217 is connected to the communication hole 212 or the notch 213 of the third current collecting structure 42 through a second connection flow channel 218, and the other end of each second micro flow channel 217 is connected to the communication hole 212 or the notch 213 of the fourth current collecting structure 43 through a second connection flow channel 218. The second fluid entering the third header structure 42 is also split into three streams: one fluid horizontally flows into the second micro-flow channel 217 connected with the notch 213 of the third collecting structure 42, and the other two fluids respectively flow to the upper and lower heat exchange plates 21 through the communicating channels 11 and then enter into the second micro-flow channel 217 connected with the communicating holes 212 so as to meet the flow requirement of the whole heat exchange core 20; through the converging action of the communicating channels 11, the second fluid exchanges heat and then enters the fourth collecting structure 43.
In the present invention, as shown in fig. 9 to 13, the first heat exchange plate 21 includes two different structural forms, namely, a first heat exchange plate 30 and a second heat exchange plate 31, as shown in fig. 10 and 11, respectively; the second plurality of heat exchanger plates 21 comprises two different structural forms of a third heat exchanger plate 32 and a fourth heat exchanger plate 33, as shown in fig. 12 and 13, respectively.
As shown in fig. 11, which is a schematic structural diagram of the second heat exchange plate 31, a plurality of first micro flow channels 215 are disposed along the length direction of the second heat exchange plate 31, a series of communication holes 212 are disposed in the inlet and outlet areas of the first micro flow channels 215, the first micro flow channels 215 are connected with the communication holes 212 through the first connection flow channels 216, and the communication holes 212 (hollowed holes) form the communication flow channels 11 after a plurality of heat exchange plates 21 are stacked-diffusion welded. As shown in fig. 10, which is a schematic structural view of the first heat exchange plate 30, it can be seen that, since the connection between the collecting port 12 and the fluid pipe 131 ensures the inlet and outlet of the first fluid, part of the communication holes 212 are omitted and are provided with notches 213, and the rest of the structures are substantially the same as those of the second heat exchange plate 31.
As shown in fig. 13, which is a schematic structural diagram of the fourth heat exchange plate 33, a plurality of second micro-channels 217 are formed on the fourth heat exchange plate 33, a series of communication holes 212 are formed in the inlet and outlet areas of the second micro-channels 217, and the second micro-channels 217 are connected with the communication holes 212 through second connecting channels 218; the structure of the fourth heat exchange plate 33 is substantially the same as that of the second heat exchange plate 31 except that the flow direction of the second fluid is a side in and out and the structure of the second micro flow channel 217 is different. As shown in fig. 12, which is a schematic structural view of the third heat exchange plate 32, it can be seen that, since the connection between the fluid collecting port 12 and the fluid pipe 131 ensures the inlet and outlet of the second fluid, part of the communication holes 212 are omitted and are set as notches 213, and the rest of the structures are substantially the same as those of the fourth heat exchange plate 33.
In the present invention, in the heat exchange process of the first fluid and the second fluid in the heat exchange core 20, please refer to the dashed arrow in fig. 9 for the flow direction of the first fluid, the solid arrow for the flow direction of the second fluid, the first fluid and the second fluid all flow in parallel, which is different from the typical PCHE, but the heat exchange plates 21 with different heights are mutually communicated through the communicating channels 11, so as to ensure the flow distribution of the heat exchange plates 21. More importantly, compared with a typical PCHE huge external current collector, the communication flow channel 11 compresses the flow distribution space in the axial direction, so that the size of the flow distribution structure is greatly reduced, and the miniaturization of the heat exchange core 20 structure is realized.
In an alternative embodiment of the present invention, as shown in fig. 11 and 13, tie bars 214 are provided between two adjacent communication holes 212 on the same heat exchange plate 21. The heat exchange core 20 is operated under the working condition of high temperature and high pressure, the mechanical structural strength of the heat exchange core is ensured to meet the requirement, and the connecting through holes 212 are separated by the lacing wires 214, so that the mechanical structural strength of the connecting flow channel 11 is improved. The micro flow channels at the inlet and outlet (i.e., the first connecting flow channel 216 and the second connecting flow channel 218) must be arranged in a contracted configuration due to the presence of the tie bars 214, but the influence on the flow heat exchange performance is substantially negligible due to their short length.
In an alternative embodiment of the present invention, the shape of the communication hole 212 may be various shapes including rectangular, square, circular.
Further, the communication hole 212 is a rectangular hole, and the rectangular hole has a rounded chamfer. Preferably, the rounded corners are provided at the root portions of the communication holes 212, which is also effective to enhance the mechanical structural strength of the communication flow passage 11.
Preferably, the thickness and the radius of the fillet can be adjusted by analyzing and designing the mechanical structure strength so as to meet the strength requirements of different working conditions.
In an alternative embodiment of the present invention, the plurality of heat exchange plates 21 are formed as the heat exchange core 20 with a partial current collecting function on the basis of a diffusion welding technique, so that the heat exchange core 20 and the heat exchanger 50 are miniaturized.
In an alternative embodiment of the invention, the collector cap 13 is welded to the side wall of the heat exchanger plate 21 located outside the collector port 12. Preferably, the collecting cover 13 is fixedly connected with the heat exchange plate 21 in a sealing manner based on a diffusion welding technology. Of course, the person skilled in the art also performs welding between the heat exchanger plates 21 and the collector hood 13 according to a brazing or other machining process.
In an alternative embodiment of the present invention, the material of the heat exchange plate 21 includes all materials that can be used for manufacturing the heat exchange plate 21, such as various stainless steels, titanium alloys, and composite materials.
In an alternative embodiment of the present invention, the first micro flow channel 215 and/or the second micro flow channel 217 on the heat exchange plate 21 include all micro flow channel structures including continuous flow channel structures such as straight, folded line, S-line, etc., and intermittent flow channel structures such as airfoil-shaped, drop-shaped, intermittent S-shaped, etc.
In an alternative embodiment of the present invention, the first micro flow channel 215 and/or the second micro flow channel 217 on the heat exchange plate 21 may not have a vortex generator, but may have a one-dimensional vortex generator, a two-dimensional vortex generator, or a three-dimensional vortex generator.
The heat exchange core 20 provided by the invention enables the micro-flow channel of the heat exchange plate 21 to be integrated with the current collecting structure 10, so that the structure of the heat exchange core 20 is more compact and miniaturized.
Embodiment III:
the present invention also proposes a heat exchanger 50, as shown in fig. 14 and 15, the heat exchanger 50 comprising at least one heat exchange core 20 as described in embodiment two.
In an alternative embodiment of the present invention, as shown in fig. 14 and 15, the heat exchanger 50 includes a plurality of heat exchange cores 20, and the plurality of heat exchange cores 20 are disposed in parallel.
The heat exchanger 50 provided by the invention can meet the pressure test requirement of a single module heat exchanger 50, namely, the pressure test can be carried out on the single heat exchange core 20, meanwhile, the thickness of the bearing plate 22 can be greatly reduced, the number of the heat exchange plates 21 is greatly increased, and the volume size of the heat exchanger 50 is effectively reduced.
The heat exchanger 50 provided by the invention is simple in principle, small in difficulty improvement compared with a typical PCHE manufacturing process, and has good market application prospect under the conditions of high-temperature high-pressure heat exchange scenes and high heat exchange quantity requirements.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (11)
1. The utility model provides a current collecting structure, sets up on the heat exchange core and be applied to on the printed circuit board heat exchanger, the heat exchange core is formed by welding a plurality of heat transfer boards of range upon range of setting, its characterized in that, current collecting structure includes many UNICOM runners, at least one collecting port and at least one collecting cover, the collecting port is seted up on the lateral wall of heat exchange core, and part the breach has been seted up to the side of heat transfer board, a plurality of breach connects gradually and forms the collecting port, remaining set up on the heat transfer board with breach counterpoint complex a plurality of communication hole, a plurality of communication hole is followed the side interval of heat transfer board sets up in proper order, each the UNICOM hole counterpoint cooperation parallel connection of heat exchange core forms the UNICOM runner, the UNICOM runner with the collecting port is linked together, the collecting cover is located the collecting port department and be located the lateral wall sealing connection of heat transfer board in the collecting port outside.
2. The current collecting structure according to claim 1, wherein tie bars are provided between adjacent two of the communication holes.
3. The current collecting structure according to claim 1, wherein the communication hole is a rectangular hole, and the rectangular hole has a rounded chamfer.
4. The header structure of claim 1, wherein said header structure includes two of said headers spaced apart, each of said headers being covered by said header cover.
5. The header structure of claim 1, wherein said header cap is welded to a sidewall of said heat exchange plate outboard of said header.
6. The utility model provides a heat exchange core, its characterized in that, heat exchange core includes two bearing plates and a plurality of heat exchange plate, a plurality of the heat exchange plate layer sets up in two between the bearing plates, along the range upon range of orientation, the first microchannel has been seted up on the heat exchange plate of the singular, the second microchannel has been seted up on the heat exchange plate of the singular, a plurality of the both ends of first microchannel are linked together with fluid pipeline through first mass flow structure and second mass flow structure respectively, a plurality of the both ends of second microchannel passageway are linked together with fluid pipeline through third mass flow structure and fourth mass flow structure respectively, first mass flow structure, second mass flow structure, third mass flow structure and fourth mass flow structure are the mass flow structure of claim 1.
7. The heat exchange core of claim 6, wherein two ends of the first micro flow channel are respectively connected with one of the first current collecting structure and the second current collecting structure, and two ends of the second micro flow channel are respectively connected with one of the third current collecting structure and the fourth current collecting structure.
8. The heat exchange core according to claim 6, wherein a first number of the heat exchange plates are provided with a plurality of first micro flow channels arranged in parallel, one end of each first micro flow channel is connected with the through hole or the notch of the first current collecting structure through a first connecting flow channel, and the other end of each first micro flow channel is connected with the through hole or the notch of the second current collecting structure through the first connecting flow channel.
9. The heat exchange core according to claim 6, wherein a plurality of second micro flow channels are formed in the second plurality of heat exchange plates, the second micro flow channels are arranged in parallel, one end of each second micro flow channel is connected with the through hole or the notch of the third current collecting structure through a second connecting flow channel, and the other end of each second micro flow channel is connected with the through hole or the notch of the fourth current collecting structure through the second connecting flow channel.
10. A heat exchanger, characterized in that it comprises at least one heat exchange core according to any one of claims 6 to 9.
11. The heat exchanger of claim 10, wherein the heat exchanger comprises a plurality of the heat exchange cores, the plurality of heat exchange cores being disposed in parallel.
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| CN202310906692.5A CN116642353B (en) | 2023-07-24 | 2023-07-24 | Current collecting structure, heat exchange core and heat exchanger |
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| CN202310906692.5A CN116642353B (en) | 2023-07-24 | 2023-07-24 | Current collecting structure, heat exchange core and heat exchanger |
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| CN116642353B true CN116642353B (en) | 2023-10-24 |
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| CN118654513A (en) * | 2024-08-16 | 2024-09-17 | 杭州沈氏节能科技股份有限公司 | Countercurrent heat exchanger |
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