CN111780597B - A microchannel air-cooled heat exchanger structure, processing method and heat exchange method - Google Patents
A microchannel air-cooled heat exchanger structure, processing method and heat exchange method Download PDFInfo
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- CN111780597B CN111780597B CN202010790869.6A CN202010790869A CN111780597B CN 111780597 B CN111780597 B CN 111780597B CN 202010790869 A CN202010790869 A CN 202010790869A CN 111780597 B CN111780597 B CN 111780597B
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- heat exchanger
- channel
- layer plate
- exchanger core
- air
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000009792 diffusion process Methods 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 23
- 238000005530 etching Methods 0.000 claims description 3
- DDTVVMRZNVIVQM-UHFFFAOYSA-N 2-(1-azabicyclo[2.2.2]octan-3-yloxy)-1-cyclopentyl-1-phenylethanol;hydrochloride Chemical compound Cl.C1N(CC2)CCC2C1OCC(O)(C=1C=CC=CC=1)C1CCCC1 DDTVVMRZNVIVQM-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- -1 nuclear industry Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- F28D9/0081—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 for one heat-exchange medium being formed by a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a micro-channel air-cooled heat exchanger structure, a processing method and a heat exchange method, wherein the heat exchanger comprises a plurality of heat exchanger core plates, a flow guide channel inner layer plate, a flow guide channel middle layer plate, a flow guide channel outer layer plate and a cover plate which are sequentially overlapped and welded into a whole by adopting vacuum diffusion welding to form the micro-channel air-cooled heat exchanger core structure, and the top of the micro-channel air-cooled heat exchanger core structure is provided with a cooling air circulation channel at the heat exchanger core. The method is more suitable for the application occasions with larger difference of volume flow and flow density on two sides of the heat exchanger.
Description
Technical Field
The invention belongs to the technical field of heat exchange devices, and particularly relates to a micro-channel air-cooled heat exchanger structure, a processing method and a heat exchange method.
Background
The printed circuit board heat exchanger (printed circuit heat exchanger, PCHE) belongs to the category of microchannel plate heat exchangers. The PCHE has the advantages of compact structure, high temperature resistance, high pressure resistance, safety, reliability and the like, and is widely applied to the fields of refrigeration air conditioning, petroleum and natural gas, nuclear industry, chemical industry, power industry and the like.
The high-temperature side and low-temperature side formats of the conventional PCHE heat exchanger are similar, and the PCHE heat exchanger is more suitable for occasions with similar heat exchange working medium densities and volume flow on two sides. If the volume flow rate difference between the two sides is large, for example, one side is air, the volume flow rate is large, the other side is high-temperature high-pressure flow rate, and the volume flow rate is small, at this time, the problem of large air side resistance can be caused by the model. However, the traditional PCHE design and processing cannot easily achieve too large difference of flow channels on two sides, otherwise, the positions of contact points of plates on two sides and supporting ribs are not matched, and welding is easy to be difficult.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a micro-channel air-cooled heat exchanger structure, a processing method and a heat exchange method, wherein an air channel is cut from a corresponding position on the top surface after the whole heat exchanger core body is subjected to vacuum diffusion welding, and the positions of a high-pressure side fluid channel flow hole and ribs on each plate are consistent no matter how the air channel is arranged, so that the welding strength is not influenced by the position and the size of the air channel, and the air channel can be larger.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A microchannel air-cooled heat exchanger structure comprises a cover plate 5, a diversion channel outer layer plate 4, a diversion channel middle layer plate 3, a diversion channel inner layer plate 2 and a plurality of heat exchanger core plates 1, wherein the heat exchanger core plates 1 are stacked front and back to form a heat exchanger core, the heat exchanger core is arranged in the middle, the diversion channel inner layer plate 2 is stacked front and back of the heat exchanger core, the diversion channel middle layer plate 3 is stacked outside the front and back diversion channel inner layer plate 2, the diversion channel outer layer plate 4 is stacked outside the front and back diversion channel middle layer plate 3, the cover plate 5 is stacked outside the front and back diversion channel outer layer plate 4, grooves or holes for high-pressure fluid circulation are formed in the cover plate 5, the diversion channel outer layer plate 4, the diversion channel middle layer plate 3, the diversion channel inner layer plate 2 and the heat exchanger core plates 1, all the plates and the cover plate are stacked in sequence and welded into a whole through vacuum diffusion welding, and a microchannel air-cooled heat exchanger core structure is formed, and a cooling air circulation channel is cut at the top of the microchannel heat exchanger core structure.
The heat exchanger core plate 1 is uniformly provided with a plurality of core plate vertical through grooves 1-1 through which cooling air circulates along the vertical direction, groove ribs 1-2 among the core plate vertical through grooves 1-1 are uniformly provided with a plurality of core plate small holes 1-3 through which high-temperature high-pressure fluid circulates along the vertical direction, the inner layer plate 2 of the flow guide channel is uniformly provided with a plurality of inner layer plate small holes 2-1 through which high-temperature high-pressure fluid circulates along the vertical direction corresponding to the positions of the core plate small holes 1-3, the middle layer plate 3 of the flow guide channel is uniformly provided with a plurality of middle layer plate horizontal through grooves 3-1 through which high-temperature high-pressure fluid circulates along the horizontal direction, the position of each middle layer plate horizontal through groove 3-1 is consistent with the position of the plurality of inner layer plate small holes 2-1 along the horizontal direction, the middle part of the outer layer plate 4 of the flow guide channel is provided with one outer layer plate through groove 4-1 through which high-temperature high-pressure fluid circulates along the vertical direction, the middle part of the cover plate 5 is provided with one cover plate through hole 5-1 through which high-temperature high-pressure fluid circulates, and the position of the cover plate through hole 5-1 is located at the position of the plate through groove 4-1.
The cooling air circulation channels cut at the top of the integral structure at the positions of the heat exchanger cores are formed by separating the tops of the heat exchanger core plates 1, so that the heat exchanger cores are prevented from being scattered.
According to the processing method of the micro-channel air-cooled heat exchanger structure, the micro-channel air-cooled heat exchanger is thinner, so that two or more micro-channel air-cooled heat exchanger core structures are firstly welded and processed in the height direction, then cooling air circulation channels are cut at the heat exchanger core at the top of the micro-channel air-cooled heat exchanger core structure, and finally the two or more micro-channel air-cooled heat exchanger core structures which are processed and molded at one time are cut into a single micro-channel air-cooled heat exchanger structure.
The concrete method for cutting the cooling air circulation channel at the top of the micro-channel air-cooled heat exchanger core structure at the heat exchanger core is that the vertical through grooves 1-1 of the core plates on the heat exchanger core plates 1 at intervals are cut up and down to form the cooling air circulation channel for cooling air circulation, so that the heat exchanger core is prevented from being scattered.
The number of the micro-channel air-cooled heat exchanger core structures subjected to one-time welding processing is determined according to the thickness of a single heat exchanger, the size of a vacuum diffusion welding machine and the size of etching equipment.
According to the heat exchange method of the microchannel air-cooled heat exchanger structure, high-temperature and high-pressure fluid to be cooled flows in from the cover plate through holes 5-1 of the cover plate 5 at the front part, is dispersed up and down through the outer layer plate through grooves 4-1, is further dispersed horizontally through the middle layer plate horizontal through grooves 3-1, then enters the core plate small holes 1-3 through the inner layer plate small holes 2-1, releases heat, then flows out from the inner layer plate small holes 2-1 at the rear part, the middle layer plate horizontal through grooves 3-1, the outer layer plate through grooves 4-1 and the cover plate through holes 5-1 in sequence, and cooling air flows through a cooling air channel at the bottom of the microchannel air-cooled heat exchanger structure and is transversely scoured to cool the high-temperature and high-pressure fluid.
The invention has the following beneficial effects:
The heat exchanger structure of the invention has the advantages that no matter how the air channels are arranged, the positions of the high-pressure side fluid channel flow holes and the ribs on each plate are consistent, so that the positions and the sizes of the air channels do not influence the welding strength, and the air channels can be larger. The method is more suitable for the application occasions with larger volume flow difference, such as air cooling heat exchangers, of the flow density at two sides of the heat exchanger.
Drawings
Fig. 1 is a schematic view of a heat exchanger plate structure.
Fig. 2 is a schematic view of a heat exchanger core plate.
Fig. 3 is a partially enlarged schematic view of a heat exchanger core plate.
Fig. 4 is a schematic view of an inner layer plate of the diversion channel.
Fig. 5 is an enlarged partial schematic view of an inner layer plate of the diversion channel.
FIG. 6 is a schematic view of a layer sheet in a flow channel.
FIG. 7 is an enlarged view of a portion of a lamina in a diversion channel.
Fig. 8 is a schematic view of an outer layer plate of the flow guide channel.
Fig. 9 is a schematic diagram of a cover plate.
Fig. 10 is an overall schematic diagram of the heat exchanger after the vacuum diffusion welding is completed.
Fig. 11 is an overall schematic view of the heat exchanger after cutting out the air channels.
Fig. 12 is a partially enlarged schematic view of the air passage after cutting out the air passage.
Fig. 13 is a schematic diagram of a single air-cooled heat exchanger.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, the microchannel air-cooled heat exchanger structure comprises a cover plate 5, a diversion channel outer layer plate 4, a diversion channel middle layer plate 3, a diversion channel inner layer plate 2 and a plurality of heat exchanger core plates 1, wherein the heat exchanger core plates 1 are stacked front and back to form a heat exchanger core, the heat exchanger core is positioned in the middle, the diversion channel inner layer plate 2 is stacked front and back, the diversion channel middle layer plate 3 is stacked outside the front and back diversion channel inner layer plate 2, the diversion channel outer layer plate 4 is stacked outside the front and back diversion channel middle layer plate 3, the cover plate 5 is stacked outside the front and back diversion channel outer layer plate 4, the cover plate 5, the diversion channel outer layer plate 4, the diversion channel middle layer plate 3, the diversion channel inner layer plate 2 and the heat exchanger core plates 1 are sequentially stacked and welded into a whole by vacuum diffusion welding, and a cooling air channel is cut at the position of the heat exchanger core of the top of the microchannel air-cooled heat exchanger core structure.
As shown in fig. 2 and 3, the core plate 1 of the heat exchanger is provided with a plurality of core plate vertical through grooves 1-1 through which cooling air circulates in the vertical direction, and the groove ribs 1-2 between the core plate vertical through grooves 1-1 are provided with a plurality of core plate small holes 1-3 through which high-temperature high-pressure fluid circulates.
As shown in fig. 4 and 5, a plurality of inner layer plate small holes 2-1 through which high-temperature and high-pressure fluid flows are uniformly formed in the position corresponding to the core plate small holes 1-3 in the vertical direction on the inner layer plate 2 of the flow guide channel.
As shown in fig. 6 and 7, the middle layer plate 3 of the diversion channel is uniformly provided with a plurality of middle layer plate horizontal through grooves 3-1 for high-temperature and high-pressure fluid circulation along the horizontal direction, and the position of each middle layer plate horizontal through groove 3-1 is consistent with the position of a plurality of inner layer plate small holes 2-1 along the horizontal direction.
As shown in fig. 8, a through groove 4-1 for passing high-temperature and high-pressure fluid is formed in the middle of the outer plate 4 of the diversion channel along the vertical direction.
As shown in fig. 9, a cover plate through hole 5-1 through which high-temperature high-pressure fluid flows is formed in the middle of the cover plate 5, and the position of the cover plate through hole 5-1 is located at the position of the outer layer plate through groove 4-1.
As a preferred embodiment of the present invention, the cooling air flow channels cut at the top of the integral structure at the heat exchanger core are not cut at the top of the heat exchanger core plates 1 at intervals, avoiding the heat exchanger cores from being scattered.
According to the processing method of the micro-channel air-cooled heat exchanger structure, as shown in fig. 10, due to the fact that the micro-channel air-cooled heat exchanger is thinner, two or more micro-channel air-cooled heat exchanger core structures are firstly welded in the height direction, as shown in fig. 11 and 12, then cooling air circulation channels are cut at the top of the micro-channel air-cooled heat exchanger core structures at the heat exchanger core, and finally the two or more micro-channel air-cooled heat exchanger core structures which are processed and formed at one time are cut into a single micro-channel air-cooled heat exchanger structure, as shown in fig. 13.
The concrete method for cutting the cooling air circulation channel at the top of the micro-channel air-cooled heat exchanger core structure is that the core plate vertical through grooves 1-1 on the heat exchanger core plate 1 at intervals are cut up and down to form the cooling air circulation channel for cooling air circulation, so that the heat exchanger core is prevented from being scattered.
According to the heat exchange method of the microchannel air-cooled heat exchanger structure, high-temperature and high-pressure fluid to be cooled flows in from the cover plate through holes 5-1 of the cover plate 5 at the front part, is dispersed up and down through the outer layer plate through grooves 4-1, is further dispersed horizontally through the middle layer plate horizontal through grooves 3-1, then enters the core plate small holes 1-3 through the inner layer plate small holes 2-1, releases heat, and flows out from the inner layer plate small holes 2-1, the middle layer plate horizontal through grooves 3-1, the outer layer plate through grooves 4-1 and the cover plate through holes 5-1 at the rear part in sequence, and cooling air flows through a cooling air channel at the bottom of the microchannel air-cooled heat exchanger structure and is transversely scoured and cooled.
The arrangement position, the cross section shape and the size of the flow channel, the position and the size of the air cooling channel and the like can be designed according to actual requirements, and the number of heat exchanger cores welded at one time is also determined according to the thickness of a single heat exchanger and the size of the vacuum diffusion welding machine and etching equipment.
Claims (5)
1. A microchannel air-cooled heat exchanger structure is characterized by comprising a cover plate (5), a diversion channel outer layer plate (4), a diversion channel middle layer plate (3), a diversion channel inner layer plate (2) and a plurality of heat exchanger core plates (1), wherein the heat exchanger core plates (1) are stacked front and back to form a heat exchanger core, the heat exchanger core is positioned in the middle, the diversion channel inner layer plate (2) is stacked front and back, the diversion channel middle layer plate (3) is stacked outside the front and back diversion channel inner layer plate (2), the diversion channel outer layer plate (4) is stacked outside the front and back diversion channel middle layer plate (3), the cover plate (5) is stacked outside the front and back diversion channel outer layer plate (4), the cover plate (5), the diversion channel outer layer plate (4), the diversion channel inner layer plate (2) and the heat exchanger core plates (1) are provided with grooves or holes for high-pressure fluid, all the plates and the cover plate are stacked in sequence and welded into an integral structure by adopting vacuum diffusion welding, and the micro-channel heat exchanger core structure is formed, and the micro-channel heat exchanger core structure is cut at the top of the heat exchanger core is cooled by air cooling channel;
the heat exchanger comprises a heat exchanger core plate (1), a plurality of core plate vertical through grooves (1-1) for cooling air to circulate, a plurality of core plate small holes (1-3) for high-temperature and high-pressure fluid to circulate, a plurality of inner layer plate small holes (2-1) for high-temperature and high-pressure fluid to circulate, a plurality of middle layer plate horizontal through grooves (3-1) for high-temperature and high-pressure fluid to circulate, and a plurality of inner layer plate small holes (2-1) for high-temperature and high-pressure fluid to circulate, wherein the positions of the middle layer plate horizontal through grooves (3-1) are consistent with the positions of the plurality of inner layer plate small holes (2-1) in the horizontal direction;
the cooling air circulation channels cut at the top of the integral structure at the positions of the heat exchanger cores are formed by separating the tops of the heat exchanger core plates (1) without cutting, so that the heat exchanger cores are prevented from being scattered.
2. The method for processing the micro-channel air-cooled heat exchanger structure according to claim 1, wherein the micro-channel air-cooled heat exchanger is thinner, so that two or more micro-channel air-cooled heat exchanger core structures are welded at one time along the height direction, cooling air circulation channels are cut at the heat exchanger core at the top of the micro-channel air-cooled heat exchanger core structure, and finally the two or more micro-channel air-cooled heat exchanger core structures which are processed and molded at one time are cut into a single micro-channel air-cooled heat exchanger structure.
3. The processing method according to claim 2, wherein the specific method for cutting the cooling air circulation channel at the heat exchanger core at the top of the micro-channel air-cooled heat exchanger core structure is that the core plate vertical through grooves (1-1) on the heat exchanger core plates (1) at intervals are cut up and down to form the cooling air circulation channel for cooling air circulation, so that the heat exchanger core is prevented from being scattered.
4. The method of claim 2, wherein the number of micro-channel air-cooled heat exchanger core structures for one welding process is determined according to the thickness of the single heat exchanger and the dimensions of the vacuum diffusion welder and etching equipment.
5. The heat exchange method of the microchannel air-cooled heat exchanger structure is characterized in that high-temperature and high-pressure fluid to be cooled flows in from a cover plate through hole (5-1) of a cover plate (5) at the front part, is dispersed up and down through an outer layer plate through groove (4-1), is further dispersed horizontally through a middle layer plate horizontal through groove (3-1), then enters a core plate small hole (1-3) through an inner layer plate small hole (2-1), passes through the inner layer plate small hole (2-1) at the rear part, the middle layer plate horizontal through groove (3-1), the outer layer plate through groove (4-1) and the cover plate through hole (5-1) after releasing heat, and cooling air flows through a cooling air channel at the bottom of the microchannel air-cooled heat exchanger structure and is transversely flushed to cool the high-temperature and high-pressure fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010790869.6A CN111780597B (en) | 2020-08-07 | 2020-08-07 | A microchannel air-cooled heat exchanger structure, processing method and heat exchange method |
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| CN202010790869.6A CN111780597B (en) | 2020-08-07 | 2020-08-07 | A microchannel air-cooled heat exchanger structure, processing method and heat exchange method |
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| CN111780597B true CN111780597B (en) | 2025-01-24 |
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| FR3152869A1 (en) | 2023-09-08 | 2025-03-14 | Commissariat A L’Energie Atomique Et Aux Energies Alternatives | Plate heat exchanger with 3D fluid circulation |
| FR3152867A1 (en) | 2023-09-08 | 2025-03-14 | Commissariat A L’Energie Atomique Et Aux Energies Alternatives | Plate heat exchanger for phase separation |
| FR3152868A1 (en) | 2023-09-08 | 2025-03-14 | Commissariat A L’Energie Atomique Et Aux Energies Alternatives | Hollow plate heat exchanger |
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| CN110701929A (en) * | 2019-11-18 | 2020-01-17 | 西安热工研究院有限公司 | A printed circuit board air-cooled heat exchanger core |
| CN110732243A (en) * | 2019-11-26 | 2020-01-31 | 中冶南方都市环保工程技术股份有限公司 | A multi-silo SCR reactor flue gas sub-silo flow equalization device |
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| JP2002267289A (en) * | 2001-03-09 | 2002-09-18 | Sanyo Electric Co Ltd | Plate heat exchanger |
| CN1244794C (en) * | 2003-01-17 | 2006-03-08 | 西安交通大学 | Fluid distribution end plate of aliform plank type heat exchanger and flow deflector connected end plate |
| JP5795994B2 (en) * | 2012-07-09 | 2015-10-14 | 住友精密工業株式会社 | Heat exchanger |
| CN203605514U (en) * | 2013-11-13 | 2014-05-21 | 南京师范大学 | Air-cooling compression condensing unit of microchannel heat exchanger |
| IL255877B (en) * | 2017-11-23 | 2019-12-31 | Dulberg Sharon | Device for extraction of water from air, and dehumidifying with high energy efficiency and methods for manufacturing thereof |
| CN207628210U (en) * | 2018-03-30 | 2018-07-20 | 中冶节能环保有限责任公司 | A kind of dry desulfurization denitration reaction tower gas approach structure and flue gas flow guiding device |
| CN110749217A (en) * | 2019-12-06 | 2020-02-04 | 江苏唯益换热器有限公司 | First plate for multi-stage flow-dividing brazing heat exchanger plate group |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701929A (en) * | 2019-11-18 | 2020-01-17 | 西安热工研究院有限公司 | A printed circuit board air-cooled heat exchanger core |
| CN110732243A (en) * | 2019-11-26 | 2020-01-31 | 中冶南方都市环保工程技术股份有限公司 | A multi-silo SCR reactor flue gas sub-silo flow equalization device |
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