CN106288912A - A kind of micro-channel heat exchanger and air-conditioner - Google Patents
A kind of micro-channel heat exchanger and air-conditioner Download PDFInfo
- Publication number
- CN106288912A CN106288912A CN201610629936.XA CN201610629936A CN106288912A CN 106288912 A CN106288912 A CN 106288912A CN 201610629936 A CN201610629936 A CN 201610629936A CN 106288912 A CN106288912 A CN 106288912A
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- China
- Prior art keywords
- micro
- channel
- heat exchanger
- channel flat
- flat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/26—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being integral with the element
- F28F1/28—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being integral with the element the element being built-up from finned sections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of micro-channel heat exchanger and air-conditioner, relate to heat-exchange apparatus technical field, invent for solving problem that in prior art, micro-channel flat tail district head causes the heat exchange efficiency of micro-channel heat exchanger to reduce.One micro-channel heat exchanger of the present invention, including micro-channel flat, the cross section of described micro-channel flat is symmetrical airfoil.A kind of micro-channel heat exchanger of the present invention for passing to the equipment of cold flow body by the partial heat of hot fluid.
Description
Technical field
The present invention relates to heat-exchange apparatus technical field, particularly relate to a kind of micro-channel heat exchanger and air-conditioner.
Background technology
Micro-channel heat exchanger refer to passage equivalent diameter 1～1000um heat exchanger, its volume coefficient of heat transfer is big, heat exchange
Efficiency is high, can meet higher Energy Efficiency Standard, and have excellent voltage endurance capability, the most progressively be applied to business, domestic
Refrigerating and air conditioning industry.
Micro-channel heat exchanger includes multiple micro-channel flat 01 and two headers 03, and multiple micro-channel flat 01 are positioned at two
Between individual header 03, and the two ends of each micro-channel flat 01 connect with two headers 03 respectively, adjacent two microchannels
Being provided with multiple fin 02 between flat tube 01, this micro-channel flat 01 is flat tube, as shown in Fig. 1～2.
Air enters after micro-channel heat exchanger (in Fig. 1, direction shown in arrow is the flow direction of air), because of by flat
The obstruction of the arc section of pipe front end, air-flow is separated and is flowed along the flat segments that flat tube is upper and lower, when gas flow to flat tube
During rear end, the upper and lower gas of flat tube starts to collect, and portion gas continues linearly to flow because of inertia, and fraction is not because being obstructed
Hindering and start the back-end region to flat tube and tighten up, air-flow mutually clashes into the tail district 02 (tail causing flat tube rear end to produce
Refer to after moving object or the disorderly bumpy flow in object downstream) longer, the energy loss of gas is relatively big, therefore gas wind speed fall
Low, the pressure loss is more, and when air-flow is again with the micro-channel flat heat exchange of rear end, heat exchange efficiency reduces, thus causes microchannel to be changed
The heat exchange efficiency of hot device reduces.
Summary of the invention
The embodiment provides a kind of micro-channel heat exchanger and air-conditioner, it is possible to resolve in prior art, microchannel is flat
Pipe tail district head causes the problem that the heat exchange efficiency of micro-channel heat exchanger reduces.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
A kind of micro-channel heat exchanger, including micro-channel flat, the cross section of described micro-channel flat is symmetrical airfoil.
The embodiment of the invention also discloses a kind of air-conditioner, including the micro-channel heat exchanger described in technique scheme.
The micro-channel heat exchanger of embodiment of the present invention offer and air-conditioner, owing to the cross section of micro-channel flat is symmetrical wing
Type, after air enters micro-channel heat exchanger, the surface along the micro-channel flat arc of symmetrical airfoil carries out the attachment stream without separating
Dynamic, and in micro-channel flat, boundary layer of air is relatively thin, when specifically applying, makes air along the arc of the micro-channel flat of symmetrical airfoil
Shape surface flow at trailing edge from leading edge, and upper downstream collects naturally, and therefore, the tail district that air is formed is shorter, the energy of air
Losing less, thus the pressure loss after air and micro-channel flat heat exchange is the least, the wind speed of air is still very fast, then with installation
In micro-channel heat exchanger near other micro-channel flat heat exchange of leeward side time, the heat exchange efficiency of micro-channel flat is higher, therefore,
The heat exchange efficiency of micro-channel heat exchanger is the highest.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of micro-channel heat exchanger in prior art；
Fig. 2 is that in prior art micro-channel heat exchanger, micro-channel flat is the structural representation of flat tube；
Fig. 3 is the structural representation of micro-channel heat exchanger in the embodiment of the present invention；
Fig. 4 is that in the embodiment of the present invention, in micro-channel heat exchanger, the cross section of micro-channel flat is the structural representation of symmetrical airfoil
One of figure；
Fig. 5 is that in the embodiment of the present invention, in micro-channel heat exchanger, the cross section of micro-channel flat is the structural representation of symmetrical airfoil
The two of figure；
Fig. 6 is the structural representation that in the embodiment of the present invention, in micro-channel heat exchanger, micro-channel flat is interspersed；
Fig. 7 is the structural representation of the concordant distribution of micro-channel flat in micro-channel heat exchanger in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
In describing the invention, it is to be understood that term " " center ", " on ", D score, "front", "rear", " left ",
Orientation or the position relationship of the instruction such as " right ", " vertically ", " level ", " top ", " end ", " interior ", " outward " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Aerofoil profile refers to, along the plane of symmetry being parallel to aircraft, open up to optional position partial application, the wing scaled off at wing
Section, wherein, the aerofoil profile of upper and lower camber line symmetry is referred to as symmetrical airfoil.With reference to Fig. 4, aerofoil profile is positioned at the end points of wing forefront
For leading edge point A, the end points being positioned at wing rearmost is trailing edge point B, connects the string of a musical instrument that straight line is aerofoil profile of leading edge point and trailing edge point
AB；Angle between string of a musical instrument AB and the speed of incoming flow of aerofoil profile is angle of attack.
Micro-channel heat exchanger is the heat exchanger that a kind of internal flow path diameter is less, including multiple micro-channel flat 1 and two
Header 3, multiple micro-channel flat 1 between two headers 3, and the two ends of each micro-channel flat 1 respectively with two
Header 3 connects, and is provided with multiple fin 2, as shown in Figure 3 between adjacent two micro-channel flat 1.
In the embodiment of the present invention, micro-channel heat exchanger includes micro-channel flat 1, and the cross section of this micro-channel flat 1 is symmetrical wing
Type, as shown in figs. 34.
The micro-channel heat exchanger that the embodiment of the present invention provides, owing to the cross section of micro-channel flat 1 is symmetrical airfoil, air enters
After entering micro-channel heat exchanger, the surface along micro-channel flat 1 arc of symmetrical airfoil carries out the attachment without separating and flows (such as Fig. 5
Direction shown in arrow), and in micro-channel flat 1, boundary layer of air is relatively thin, when specifically applying, makes micro-along symmetrical airfoil of air
The curved surfaces of passage flat tube 1 flow at trailing edge from leading edge, and upper downstream collects naturally, and therefore, the tail district that air is formed is relatively
Short, the energy loss of air is less, thus the pressure loss after air and micro-channel flat 1 heat exchange is the least, the wind speed of air
Still very fast, then be installed on micro-channel heat exchanger near other micro-channel flat 1 heat exchange of leeward side time, micro-channel flat 1
Heat exchange efficiency is higher, and therefore, the heat exchange efficiency of micro-channel heat exchanger is the highest.
In the embodiment of the present invention, micro-channel flat 1 is multiple, and in order to reduce front side further, (front side herein refers near changing
Hot device windward side) the micro-channel flat impact on micro-channel flat 1 thereafter, it is preferable that multiple micro-channel flat 1 is in multiple row
Distribution, and installation of the micro-channel flat 1 of adjacent two row mutually being staggered, as shown in Figure 6, can reduce previous column micro-channel flat 1
The turbulent flow in the tail district impact on rear string micro-channel flat 1, it is ensured that the heat exchange property of micro-channel heat exchanger.
Big and the wind speed application scenario faster for needs air output, based on above-described embodiment, can be by flat for multiple row microchannel
Pipe 1 flushly mounts with, as it is shown in fig. 7, micro-channel flat 1 is less to the resistance of air, such air can comparatively fast change through microchannel
Hot device (in Fig. 7, the direction of arrow is the flow direction of air), micro-channel heat exchanger to go out wind velocity higher.
At present, micro-channel flat uses extrusion forming process manufacture, and its production difficulty is relatively big, and dimensional accuracy also requires that relatively
Height, the one end in micro-channel flat cross section to be made as tip by the embodiment of the present invention, and its technology difficulty is too big, it is therefore preferred that
The trailing edge of the micro-channel flat 1 of symmetrical airfoil is designed as circular arc by the embodiment of the present invention, manufactures to facilitate.
Specifically, the trailing edge radius of the micro-channel flat 1 of symmetrical airfoil should be less than leading-edge radius, and in view of the tail of trailing edge
Mark district size, should be under process conditions allow, and the micro-channel flat 1 of symmetrical airfoil, its trailing edge radius is the smaller the better.
Further, in the embodiment of the present invention, micro-channel heat exchanger also includes fin 2, corresponding micro-channel flat 1 on fin 2
Being provided with a micro-channel flat 1 in offering multiple aerofoil profile through hole, and each aerofoil profile through hole, the setting of fin 2 can increase and carries
The heat exchange area of high micro-channel heat exchanger, thus improve the heat exchange efficiency of micro-channel heat exchanger.
Specifically, the symmetrical airfoil that in the embodiment of the present invention, micro-channel flat 1 cross section is used is that NACA four figures is symmetrical
Aerofoil profile (NACA:National Advisory Committee for Aeronautics, American National aviation consultative council
Meeting), this aerofoil profile has higher maximum lift coefficient and relatively low resistance coefficient.When specifically used, micro-channel flat 1
Cross section can use NACA0006, NACA0009, NACA0012, NACA0015, NACA0018, NACA0021 and NACA0024
Deng, the first figure place of above-mentioned aerofoil profile represents camber (ultimate range referring between the mean camber line of aerofoil profile and the string of a musical instrument), the second figure place
Representing the chordwise location of mean camber line peak, be ten marks of chord length, last double figures representative thickness, is the percent of chord length,
Such as NACA0012 refers to without camber, and mean camber line overlaps with the string of a musical instrument (i.e. symmetrical), and thickness is the aerofoil profile of chord length 12%.Concrete NACA
The basic thickness distribution of four figures symmetrical airfoil is:
In formula,Lower aerofoil relative coordinate on finger,Wherein, y refers to upper lower aerofoil coordinate, and c refers to chord length；
Refer to relative maximum thickness,Wherein, t refers to maximum gauge；
The relative position of dinger thickness degree,Wherein, the position of x dinger thickness degree.
According to specific needs, select suitable NACA four figures symmetrical airfoil model, determine suitable chord length, then
According to above-mentioned thickness distribution formula, concrete aerofoil profile figure can be drawn.
Further, in order to ensure the bonding strength between micro-channel flat 1 and fin 2, and reduce thermal contact resistance, this
Micro-channel flat 1 is welded together by bright embodiment with fin 2, and preferably by soldering processes, this technique has soldering
Deform little, the advantage such as joint smooth and beautiful appearance.
The embodiment of the invention also discloses a kind of air-conditioner, have employed above-mentioned all of micro-channel heat exchanger.Due at this
The micro-channel heat exchanger installed in the air-conditioner of embodiment and the microchannel of offer in each embodiment of above-mentioned micro-channel heat exchanger
Heat exchanger is identical, and therefore the two can solve the problem that identical technical problem, and reaches identical Expected Results.
Further, being additionally provided with fan in air-conditioner, this fan is positioned at the one of micro-channel flat 1 leading edge of symmetrical airfoil
Side, and the air-out of fan is the most identical with the string of a musical instrument direction of the micro-channel flat 1 of symmetrical airfoil, so, can make entrance microchannel
In heat exchanger, the angle of attack between the string of a musical instrument AB of the micro-channel flat 1 of the velocity attitude of air and this symmetrical airfoil is zero, such as Fig. 5
Shown in Fig. 7, therefore, lift is zero, will not make to produce between symmetrical airfoil micro-channel flat 1 and fin 2 vibration.In this process
In, the micro-channel flat of symmetrical airfoil is mainly frictional resistance to the resistance of air, and therefore, the surface improving micro-channel flat is put down
Slippery so that coefficient of frictional resistance is about between 0.005～0.008, thus reduces the pressure loss of air further.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (11)
1. a micro-channel heat exchanger, including micro-channel flat, it is characterised in that the cross section of described micro-channel flat is symmetrical wing
Type.
Micro-channel heat exchanger the most according to claim 1, it is characterised in that described micro-channel flat is multiple and multiple
Described micro-channel flat is many column distributions, and the described micro-channel flat of adjacent two row mutually stagger installation.
Micro-channel heat exchanger the most according to claim 1, it is characterised in that described micro-channel flat is multiple and multiple
Described micro-channel flat is many column distributions, and micro-channel flat described in multiple row flushly mounts with.
Micro-channel heat exchanger the most according to claim 1, it is characterised in that after the described micro-channel flat of symmetrical airfoil
Edge is circular arc.
Micro-channel heat exchanger the most according to claim 4, it is characterised in that after the described micro-channel flat of symmetrical airfoil
Edge radius is less than leading-edge radius.
Micro-channel heat exchanger the most according to claim 1, it is characterised in that also include fin, corresponding institute on described fin
Stating micro-channel flat and offer multiple aerofoil profile through hole, each described aerofoil profile through hole is provided with a described micro-channel flat.
Micro-channel heat exchanger the most according to claim 1, it is characterised in that the cross section of described micro-channel flat is used
Symmetrical airfoil is NACA four figures symmetrical airfoil.
Micro-channel heat exchanger the most according to claim 7, it is characterised in that the cross section of described micro-channel flat is used
Symmetrical airfoil is NACA0006, NACA0009, NACA0012, NACA0015, NACA0018, NACA0021 or NACA0024.
Micro-channel heat exchanger the most according to claim 6, it is characterised in that described micro-channel flat is passed through with described fin
Welding manner connects.
10. an air-conditioner, it is characterised in that include the micro-channel heat exchanger according to any one of the claims 1～9.
11. air-conditioners according to claim 10, it is characterised in that also include that fan, described fan are positioned at symmetrical airfoil
The side of described micro-channel flat leading edge, and the string of the air-out direction of described fan and the described micro-channel flat of symmetrical airfoil
Line is parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629936.XA CN106288912A (en) | 2016-08-03 | 2016-08-03 | A kind of micro-channel heat exchanger and air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629936.XA CN106288912A (en) | 2016-08-03 | 2016-08-03 | A kind of micro-channel heat exchanger and air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106288912A true CN106288912A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610629936.XA Pending CN106288912A (en) | 2016-08-03 | 2016-08-03 | A kind of micro-channel heat exchanger and air-conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336045A (en) * | 2018-02-07 | 2018-07-27 | 电子科技大学 | The microchannel cooling system constituted using the imitative Airfoil Sections cooling fin of 3D printing |
| CN109707514A (en) * | 2018-12-26 | 2019-05-03 | 中国人民解放军国防科技大学 | Microchannel and precooler |
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|---|---|---|---|---|
| JPS62166294A (en) * | 1986-01-16 | 1987-07-22 | Nippon Denso Co Ltd | Heat exchanger |
| CN2149598Y (en) * | 1992-07-11 | 1993-12-15 | 青岛化工学院 | Drop-cross-section tubular heat exchanger |
| CN2328971Y (en) * | 1998-02-16 | 1999-07-14 | 潍坊宏伟化工设备厂 | Water drop type tube air preheater |
| WO2004027234A1 (en) * | 2002-09-20 | 2004-04-01 | Modine Manufacturing Company | Internally mounted radial flow intercooler for a combustion air charger |
| EP1429101A2 (en) * | 2002-12-11 | 2004-06-16 | Modine Manufacturing Company | Heat-exchanger assembly with wedge-shaped tubes with balanced coolant flow |
| CN102192672A (en) * | 2010-03-16 | 2011-09-21 | 乐金电子(天津)电器有限公司 | Flat tube heat exchanger structure and assembling method thereof |
| CN102338570A (en) * | 2010-07-16 | 2012-02-01 | 乐金电子(天津)电器有限公司 | Heat exchanger structure and assembly process thereof |
| CN203274572U (en) * | 2013-03-11 | 2013-11-06 | 三花控股集团有限公司 | Flat pipe suitable for bending and heat exchanger provided with same |
| CN104197750A (en) * | 2014-09-23 | 2014-12-10 | 大连葆光节能空调设备厂 | Wedge-shaped tubular heat exchanger |
-
2016
- 2016-08-03 CN CN201610629936.XA patent/CN106288912A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62166294A (en) * | 1986-01-16 | 1987-07-22 | Nippon Denso Co Ltd | Heat exchanger |
| CN2149598Y (en) * | 1992-07-11 | 1993-12-15 | 青岛化工学院 | Drop-cross-section tubular heat exchanger |
| CN2328971Y (en) * | 1998-02-16 | 1999-07-14 | 潍坊宏伟化工设备厂 | Water drop type tube air preheater |
| WO2004027234A1 (en) * | 2002-09-20 | 2004-04-01 | Modine Manufacturing Company | Internally mounted radial flow intercooler for a combustion air charger |
| EP1429101A2 (en) * | 2002-12-11 | 2004-06-16 | Modine Manufacturing Company | Heat-exchanger assembly with wedge-shaped tubes with balanced coolant flow |
| CN102192672A (en) * | 2010-03-16 | 2011-09-21 | 乐金电子(天津)电器有限公司 | Flat tube heat exchanger structure and assembling method thereof |
| CN102338570A (en) * | 2010-07-16 | 2012-02-01 | 乐金电子(天津)电器有限公司 | Heat exchanger structure and assembly process thereof |
| CN203274572U (en) * | 2013-03-11 | 2013-11-06 | 三花控股集团有限公司 | Flat pipe suitable for bending and heat exchanger provided with same |
| CN104197750A (en) * | 2014-09-23 | 2014-12-10 | 大连葆光节能空调设备厂 | Wedge-shaped tubular heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336045A (en) * | 2018-02-07 | 2018-07-27 | 电子科技大学 | The microchannel cooling system constituted using the imitative Airfoil Sections cooling fin of 3D printing |
| CN109707514A (en) * | 2018-12-26 | 2019-05-03 | 中国人民解放军国防科技大学 | Microchannel and precooler |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 266736 Hisense Road 1, South Village Town, Pingdu City, Qingdao, Shandong Applicant after: Hisense (Shandong) Air-conditioning Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Qingdao, Shandong Province, No. 151 Applicant before: Hisense (Shandong) Air-conditioning Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |