CN102313401B - Microchannel heat exchanger - Google Patents
Microchannel heat exchanger Download PDFInfo
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- CN102313401B CN102313401B CN 201110315878 CN201110315878A CN102313401B CN 102313401 B CN102313401 B CN 102313401B CN 201110315878 CN201110315878 CN 201110315878 CN 201110315878 A CN201110315878 A CN 201110315878A CN 102313401 B CN102313401 B CN 102313401B
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Abstract
The invention discloses a microchannel heat exchanger, which comprises a fluid passage. A working fluid inlet and a refrigerating working substance outlet are molded at one end of the fluid passage; a working fluid outflow opening and a refrigerating working substance inlet are molded at the other end of the fluid passage; a heat exchange section is arranged in the fluid passage; a plurality of refrigerating working substance passages and working fluid passages which are mutually parallel are alternately arranged at the heat exchange section to achieve heat exchange; the refrigerating working substance passages and the working fluid passages are molded between metal plates which are superposed, combined and connected; refrigerating working substance grooves and working fluid grooves are alternately molded on at least one side surfaces of the adjacent metal plates; and after the metal plates are superposed, combined and connected, the refrigerating working substance grooves and the working fluid grooves respectively form the refrigerating working substance passages and the working fluid passages. The microchannel heat exchanger is formed by mutually superposing, combining and connecting a plurality of the metal plates with the same structures; compared with a conventional microchannel heat exchanger, the heat exchanger provided by the invention is more suitable for batch production; and the cost is decreased greatly.
Description
Technical field
The present invention relates to the heat exchanger components take heat exchange as purpose between two kinds of fluids; Specifically can be used as the micro-channel heat exchanger that carries out the transmission of heat energy between water and refrigeration working medium.
Background technology
At present, in field of heat exchangers, micro-channel heat exchanger can satisfy the requirement of compact heat exchanger due to volume, weight less, is the new direction of current heat exchanger research and development.
But the existing micro-channel heat exchanger that is used for heat pump is nearly all to add that with the aluminum flat tube section bar import and export of refrigeration working medium and working fluid realize, only limits to the branch type heat exchanger that the heat exchange between refrigeration working medium and air is used.As the micro-channel heat exchanger that is used for heat pump of setting forth in number of patent application 200510012007.6,200810115272.0 and 200510079932.0, all add inventor's idea or consist of invention in kind on the basis of aluminum flat tube section bar.But above-mentioned three inventions exist following problem: 1. the heat exchange flat tube is the aluminum pipe section bar, and section bar is of a size of definite value.Hydraulic diameter selection for the microchannel is restricted, is difficult to choose the later aluminum pipe section bar of Optimal Structure Designing.Also have, produced at present the restriction of aluminum pipe section bar technology, the size (very thin) that the wall thickness between the microchannel can not accomplish to conduct heat requirement uses flat tube just can not become the direction of micro-channel heat exchanger technology as the micro-channel heat exchanger of aluminum pipe profile design like this.2. be soldering due to what adopt between the fin that the microchannel passed through of refrigeration working medium and air pass through, consequent thermal resistance problem does not solve.3. above-mentioned three applications only limit to the branch type heat exchanger that between refrigeration working medium and air, heat exchange is used.Air and other working fluid (such as water, non freezing solution, nano-fluid etc.), due to the difference of forced-convection heat transfer coefficient, needed heat transfer area is just different, and the structure of heat exchanger is just fully different.The forced-convection heat transfer coefficient ratio refrigeration working medium of air is wanted little 2 orders of magnitude, so the branch type heat exchanger that the heat exchange between refrigeration working medium and air is used need to design the heat transfer area of air side very greatly, thereby the volume of heat exchanger is also just larger.And the forced-convection heat transfer coefficient of water is compared with refrigeration working medium about a little order of magnitude, so heat exchanger just can design compactly, improves heat exchange efficiency, saves material.
For addressing the above problem, Chinese patent application CN102116545A discloses a kind of micro-channel heat exchanger, it can be used for refrigeration working medium and working fluid (such as water, non freezing solution, nano-fluid etc.) heat exchange between, can be used for Teat pump boiler, heat pump boiler (ATW(Air to Water)), the heat pump such as water source source heat pump and used heat heat source heat pump system.Simultaneously, its refrigeration working medium passage is combined by the method that atom spreads with fluid passage and interlayer between the two, and it does not weld the thermal resistance of generation, and the heat transfer area in unit volume is greater than 700.But in this application, the structure of working fluid and refrigeration working medium microchannel needs the metal sheet of 3 layers of photoetch to consist of, and because the processing parts number in production process increases, is unfavorable for the low-cost production of micro-channel heat exchanger of carrying out in enormous quantities.
Summary of the invention
For this reason, technical problem to be solved by this invention is the existing high problem of micro-channel heat exchanger production cost, and a kind of realization micro-channel heat exchanger cheaply is provided.
for solving the problems of the technologies described above, micro-channel heat exchanger of the present invention comprises the fluid passage, and an end of described fluid passage forms Working-fluid intaking and refrigeration working medium outlet, the other end forms working fluid flow export and refrigeration working medium entrance, be provided with heat exchanging segment in described fluid passage, described heat exchanging segment is arranged alternately by a plurality of refrigeration working medium passages that are parallel to each other and working fluid passage and realizes heat exchange, described refrigeration working medium passage and working fluid channel forming in stacked in conjunction with between the metallic plate that is connected, a side of adjacent metal sheets alternately forms refrigeration working medium groove and working fluid groove, form the refrigeration working medium groove on another side, the stacked combination in side that described metallic plate has the working fluid groove is connected to form heat exchange unit, the stacked combination of a plurality of heat exchange units is connected to form described heat exchanging segment.
Described refrigeration working medium passage is 1:0.25-15 with the ratio of the hydraulic diameter of working fluid passage.
The hydraulic diameter of described refrigeration working medium passage is 0.0675-0.5mm; The hydraulic diameter of described working fluid microchannel is 0.125-1mm.
The cross section of described refrigeration working medium passage and working fluid passage is can be random geometry according to processing conditions; Preferably, cross sectional shape is rectangle, and the thickness deltat of described metallic plate is 0.5-2.5 times of the partition wall thickness δ between described refrigeration working medium passage and working fluid passage.
Described plate thickness Δ is 0.19-0.7mm.
Partition wall thickness δ between described refrigeration working medium passage and working fluid passage is 0.125-0.5mm.
The material of described metallic plate is identical, and by solid atom method of diffusion, stacked conducting plate is combined into integral body.
The material of described metallic plate is a kind of in stainless steel, copper and aluminium.
Fig. 4 is the variation of partition wall thickness δ between the microchannel and the relation between withstand voltage safe multiplying power, can find out according to Fig. 4, when the thickness deltat of sheet metal is 2 times of the minimum value of δ, fixedly calculate its withstand voltage safe multiplying power of span for all partition bulkhead thickness all more than 25 times by face A and face B, freely calculate its withstand voltage safe multiplying power of span for all partition bulkhead thickness more than 5 times by face A stationary plane B.δ is greater than after 0.3, and the increase of the safe multiplying power that it is withstand voltage tends towards stability.Therefore, choosing partition wall thickness δ is that the metallic plate compressive resistance of 0.125-0.5mm can satisfy.
Fig. 5 has represented the variation of thickness δ of partition wall between the microchannel and the relation between the heat resist increment rate.According to the result that represents in Fig. 5, when the thickness deltat of sheet metal is 2 times of the minimum value of δ, between the microchannel, the increase of the variation of the thickness δ of partition wall and heat resist increment rate is linear, be in the span of 0.125-0.5mm at partition bulkhead thickness δ, the heat resist increment rate is 3.3% to the maximum.This heat resist increment rate is negligible degree in design of heat transfer.
Technique scheme of the present invention has the following advantages compared to existing technology:
The present invention connects and composes micro-channel heat exchanger by the mutual stacked combination of the metallic plate of a plurality of same structures, than the existing micro-channel heat exchanger that passes through the stacked formation of metallic plate of three kinds of different structure forms, heat exchanger of the present invention is more suitable for batch production, and cost reduces greatly.
Preferably, the hydraulic diameter of refrigeration working medium passage of the present invention is 0.0675-0.5mm; The hydraulic diameter of described working fluid microchannel is 0.125-1mm.Described plate thickness Δ is 0.1125-0.7mm.Partition wall thickness δ between described refrigeration working medium passage and working fluid passage is 0.125-0.5mm.Through finding out the withstand voltage safe multiplying power of this metallic plate and the numerical simulation of heat resist increment rate, metallic plate in above-mentioned span can satisfy the requirement of intensity and rigidity, only has simultaneously minimum thermal resistance, and above-mentioned size is through the production technology checking, heat exchanger microchannel compared to existing technology, its processing cost is lower.
Description of drawings
For content of the present invention is more likely to be clearly understood, the below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is micro-channel heat exchanger structural representation of the present invention;
Fig. 2 is the heat exchanging segment sectional view that forms the microchannel;
Fig. 3 is the metallic plate cross-sectional view;
Fig. 4 is the variation of partition wall thickness δ between the microchannel and the relation between withstand voltage safe multiplying power;
Fig. 5 is the variation of partition wall thickness δ between the microchannel and the relation between the heat resist increment rate.
In figure, Reference numeral is expressed as:
1-Working-fluid intaking 2-working fluid outlet 3-refrigeration working medium outlet 4-refrigeration working medium entrance 5-heat exchanging segment 6-metallic plate
11-refrigeration working medium passage 12-working fluid passage 61-refrigeration working medium groove 62-working fluid groove
The specific embodiment
Below with reference to accompanying drawing, use following examples that the present invention is further set forth.
Fig. 1 is micro-channel heat exchanger of the present invention, comprises the fluid passage, and an end of described fluid passage forms Working-fluid intaking 1 and refrigeration working medium outlet 3; The other end forms working fluid outlet 2 and refrigeration working medium entrance 4, is provided with heat exchanging segment 5 in described fluid passage, and described heat exchanging segment 5 comprises a plurality of refrigeration working medium passages 11 and working fluid passage 12 that are parallel to each other and are arranged alternately.Water at low temperature enters heat exchanger from Working-fluid intaking 1, with the HTHP refrigeration working medium gas that enters from refrigeration working medium entrance 4 after heat exchanging segment 5 phase-change heat-exchanges, from working fluid flow export 2 with high-temperature water flow out, and refrigeration working medium flows out from the state of refrigeration working medium outlet 3 with liquid, realizes the heat exchange of this heat exchanger.
as shown in Figure 2, described refrigeration working medium passage 11 takes shape in stacked in conjunction with between the metallic plate 6 that is connected with working fluid passage 12, a side of described metallic plate 6 alternately forms refrigeration working medium groove 61 and working fluid groove 62, form refrigeration working medium groove 61 on another side, the stacked combination in side with working fluid groove 62 of described metallic plate 6 is connected to form heat exchange unit, after described metallic plate 6 connects through stacked combination, opposed two cold working medium grooves 61 and working fluid groove 62 form respectively described refrigeration working medium passage 11 and working fluid passage 12.The stacked combination of a plurality of described heat exchange units is connected to form described heat exchanging segment 5.
In the present embodiment, the cross section of described microchannel is rectangle, and described refrigeration working medium passage 11 is 1:2 with the ratio of the hydraulic diameter of working fluid passage 12.As other embodiment, the cross section of described microchannel can also be any plastic shape such as circular, oval.
The hydraulic diameter of the described refrigeration working medium passage 11 of the present embodiment is 0.5mm; The hydraulic diameter of described working fluid microchannel 12 is 1mm.
Partition wall thickness between metallic plate 6 thickness of the described refrigeration working medium passage 11 of moulding and working fluid microchannel 12 and refrigeration working medium passage 11 and working fluid microchannel 12 should be can proof strength and the condition of difficulty of processing under, the less heat exchange efficiency of thickness is higher.In order to satisfy above-mentioned condition, the applicant obtains the partition wall thickness δ value range of plate thickness Δ of the present invention and microchannel, as shown in Figure 3 through test of many times.In the present embodiment, the thickness deltat of described metallic plate is 2 times of partition wall thickness δ between described refrigeration working medium passage and working fluid passage.Described metallic plate 6 thickness deltat are 0.7mm.Partition wall thickness δ between described refrigeration working medium passage 11 and working fluid passage 12 is 0.35mm.
The material of described metallic plate 6 is identical, and by solid atom method of diffusion, stacked conducting plate is combined into integral body.The material of metallic plate described in the present embodiment 6 is stainless steel.
Embodiment 2
Basically identical in micro-channel heat exchanger in the present embodiment and embodiment 1, its distinctive points is:
The hydraulic diameter of the described refrigeration working medium passage 11 in the present embodiment is 0.25mm; The hydraulic diameter of described working fluid microchannel 12 is 0.5mm.
Metallic plate 6 thickness deltat of the described refrigeration working medium passage 11 of moulding and described working fluid microchannel 12 are 0.25mm.Partition wall thickness δ between described refrigeration working medium passage 11 and working fluid passage 12 is 0.13mm.
The material of metallic plate described in the present embodiment 6 is copper.
Basically identical in micro-channel heat exchanger in the present embodiment and embodiment 1, its distinctive points is:
The hydraulic diameter of the described refrigeration working medium passage 11 in the present embodiment is 0.0625mm; The hydraulic diameter of described working fluid microchannel 12 is 0.125mm.
Metallic plate 6 thickness deltat of the described refrigeration working medium passage 11 of moulding and described working fluid microchannel 12 are 0.19mm.Partition wall thickness δ between described refrigeration working medium passage 11 and working fluid passage 12 is 0.38mm.
The material of metallic plate described in the present embodiment 6 is aluminium.
Basically identical in micro-channel heat exchanger in the present embodiment and embodiment 1, its distinctive points is:
The hydraulic diameter of the described refrigeration working medium passage 11 in the present embodiment is 0.125mm; The hydraulic diameter of described working fluid microchannel 12 is 0.3mm.
Metallic plate 6 thickness deltat of the described refrigeration working medium passage 11 of moulding and described working fluid microchannel 12 are 0.4mm.Partition wall thickness δ between described refrigeration working medium passage 11 and working fluid passage 12 is 0.16mm.
The material of metallic plate described in the present embodiment 6 is copper.
Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (8)
1. a micro-channel heat exchanger, comprise the fluid passage, and an end of described fluid passage forms Working-fluid intaking (1) and refrigeration working medium outlet (3); The other end forms working fluid flow export (2) and refrigeration working medium entrance (4), be provided with heat exchanging segment (5) in described fluid passage, described heat exchanging segment (5) is arranged alternately by a plurality of refrigeration working medium passages (11) that are parallel to each other and working fluid passage (12) and realizes it is characterized in that heat exchange:
Described refrigeration working medium passage (11) takes shape in stacked in conjunction with between the metallic plate (6) that is connected with working fluid passage (12), a side of adjacent described metallic plate (6) alternately forms refrigeration working medium groove (61) and working fluid groove (62), form refrigeration working medium groove (61) on another side, opposed stacked the formation in conjunction with company in side that described metallic plate (6) has working fluid groove (62) connects heat exchange unit, and the stacked combination of a plurality of heat exchange units is connected to form described heat exchanging segment (5).
2. micro-channel heat exchanger according to claim 1 is characterized in that:
Described refrigeration working medium passage (11) is 1:0.25-15 with the ratio of the hydraulic diameter of working fluid passage (12).
3. micro-channel heat exchanger according to claim 2 is characterized in that:
The hydraulic diameter of described refrigeration working medium passage (11) is 0.0675-0.5mm; The hydraulic diameter of described working fluid microchannel (12) is 0.125-1mm.
4. micro-channel heat exchanger according to claim 1 is characterized in that:
Described refrigeration working medium passage (11) is rectangle with the cross section of working fluid passage (12), and the thickness deltat of described metallic plate (6) is 0.5-2.5 times of the partition wall thickness δ between described refrigeration working medium passage (11) and working fluid passage (12).
5. according to claim 1-4 arbitrary described micro-channel heat exchangers is characterized in that:
Described metallic plate (6) thickness deltat is 0.19-0.7mm.
6. micro-channel heat exchanger according to claim 4 is characterized in that:
Partition wall thickness δ between described refrigeration working medium passage (11) and working fluid passage (12) is 0.125-0.5mm.
7. micro-channel heat exchanger according to claim 1 is characterized in that:
The material of described metallic plate (6) is identical, and by solid atom method of diffusion, stacked conducting plate is combined into integral body.
8. micro-channel heat exchanger according to claim 7 is characterized in that:
The material of described metallic plate (6) is a kind of in stainless steel, copper and aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110315878 CN102313401B (en) | 2011-10-18 | 2011-10-18 | Microchannel heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110315878 CN102313401B (en) | 2011-10-18 | 2011-10-18 | Microchannel heat exchanger |
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| CN102313401A CN102313401A (en) | 2012-01-11 |
| CN102313401B true CN102313401B (en) | 2013-06-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104165538B (en) * | 2014-08-18 | 2016-03-23 | 上海理工大学 | Heat abstractor |
| CN104591073A (en) * | 2014-12-05 | 2015-05-06 | 上海交通大学 | Microchannel structure and method for generating microchannel |
| CN111721147B (en) * | 2019-03-22 | 2022-02-25 | 中国石油化工股份有限公司 | Heat exchange unit and heat exchange reactor |
| CN110631386B (en) * | 2019-09-09 | 2020-09-25 | 贵州永红航空机械有限责任公司 | Micro-channel plate-fin heat exchanger and forming and assembling method |
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| US5851636A (en) * | 1995-12-29 | 1998-12-22 | Lantec Products, Inc. | Ceramic packing with channels for thermal and catalytic beds |
| US20070158050A1 (en) * | 2006-01-06 | 2007-07-12 | Julian Norley | Microchannel heat sink manufactured from graphite materials |
| JP2007333353A (en) * | 2006-06-19 | 2007-12-27 | Univ Of Tsukuba | Micro-channel integrated type laminated structure heat exchanger for super critical refrigerant |
| JP2008117035A (en) * | 2006-11-01 | 2008-05-22 | Matsushita Electric Ind Co Ltd | Vending machine |
| CN102095285B (en) * | 2011-02-10 | 2012-07-18 | Tcl空调器(中山)有限公司 | Flat tube manufacturing method of microchannel heat exchanger |
| CN202281422U (en) * | 2011-10-18 | 2012-06-20 | 杭州沈氏换热器有限公司 | Microchannel heat exchanger |
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Owner name: HANGZHOU SHENSHI ENERGY SAVING TECHNOLOGY CO., LTD Free format text: FORMER NAME: HANGZHOU SHENSHI HEAT EXCHANGER CO., LTD. |
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Address after: Jiande hangtou Town Industrial Zone, Hangzhou city 311612 large mouth block in Zhejiang Province Patentee after: HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY CO., LTD. Address before: Hangzhou City, Zhejiang province 311612 large hangtou town of Jiande City Industrial Park Patentee before: Hangzhou Shenshi Heat Exchanger Co., Ltd. |