Mokhoa oa ho Etsa Likhoeli tsa Microchannel (MCHEs)

Tlhahiso ea li-MCHE ke ts'ebetso e nepahetseng-e kopanyang mahlale a matle, mokhoa oa extrusion molding, le litheknoloji tsa ho kopanya mocheso, tse etselitsoeng ho etsa liteishene tse nyane tse phallang haholo (0.1–2 mm) bakeng sa ho fetisa mocheso hantle. Mehato ea bohlokoa ke e latelang:

1. Aluminium Alloy Material Tokiso

Li-MCHE haholo-holo li sebelisa lialloi tsa aluminium (mohlala, 3003, 6061) ka lebaka la boima ba tsona bo bobebe, li sebelisa mocheso o phahameng, le -tse sebetsang hantle.

Khetho ea Lintho: Li-ingots tse phahameng- tsa aluminium tse hloekileng li kopantsoe le metsoako ea motsoako (magnesium, silicon) ho matlafatsa matla a mochine le ho hanyetsa ho bola, ho finyella litekanyetso tsa ASTM B209 kapa EN 573-3.

Ho sebetsa esale pele: Bokaholimo ba ingot boa tlotsoa (ho sebelisoa lihloekisi tsa alkaline) 'me li tšetsoe (ka dilute nitric acid) ho tlosa li-oxide, oli, kapa litšila-ke tsa bohlokoa haholo bakeng sa ho netefatsa hore ho na le monko o tšoanang le oa boleng ba brazing hamorao.

2. Microchannel Flat Tube Extrusion

Mohato ona o theha "moko" oa li-MCHE: li-tubes tse bataletseng tse nang le li-microchannel tse ngata tse bapileng.

Tlhophiso ea Extrusion: Aluminium alloy billet e futhumetseng (450–500℃) e phunyeletsoa ka mokhoa o nepahetseng{2}}engineered die (ka microchannel{3}}shaped cavities) ka mochine oa khatiso oa hydraulic. Moralo oa die o khetha ka kotloloho boholo ba mocha (hangata<1 mm for high-efficiency models) and distribution.

Size Calibration: The extruded flat tube e pholile ka potlako (ka moea kapa ho tima metsi) ho boloka botsitso ba dimensional, ebe o khaola ho ea bolelele bo hlokahalang (ho tloha ho 0.5 m ho ea ho 6 m, ho itšetlehile ka kopo).

Tlhahlobo ea Boleng: Li-micrometer tsa laser li netefatsa bophara ba kanale, botenya ba lebota, le ho ba sephara-mamello li laoloa ka har'a ±0.02 mm ho qoba ho se lumellane ha phallo.

3. Fins Stamping & Forming

Lithapo li eketsoa liphapeng tse bataletseng ho holisa sebaka sa phetisetso ea mocheso (ntho ea bohlokoa molemong oa katleho ea MCHE).

Mokhoa oa ho hatakela: Maqephe a Aluminium (0.1–0.2 mm botenya) a kenngoa mochineng oa khatiso o nepahetseng ho etsa lipaterone tsa mapheo -meetso e tloaelehileng e kenyelletsa mapheoana a louvered (bakeng sa moferefere o matlafalitsoeng oa phallo ea moea) kapa mapheoana a masenke (bakeng sa ho kopana).

Pele{{0}Kalafo ea ho Coating: Mapheo a ka 'na a phekoloa ka holim'a metsi (mohlala, chromate conversion coating) ho ntlafatsa ho khomarela ka brazing flux le ho matlafatsa post{2}}brazing corrosion resistance.

4. Core Assembly (Tube-Fin Stacking)

Li-tubes le mapheoana li kopanngoa ho ba "mokhoa oa ho fapanyetsa mocheso"{0}}karolo ea motheo ea tšebetso.

Layered Stacking: Li-tubes tse bataletseng li tsamaisana ka ho bapa, 'me mapheoana a kenngoe lipakeng tsa li-tubes tse bapileng ho etsa sandwich-e kang sebopeho. Li-clamp tsa nakoana li tšoara kopano ho thibela ho se lumellane.

Taolo ea Lekhalo: Lekhalo pakeng tsa li-tubes le mapheoana le bolokiloe ho<0.05 mm to ensure full contact during brazing, minimizing thermal resistance at the interface.

5. Vacuum Brazing (Thermal Joining)

Vacuum brazing ke mohato oa bohlokoa o kopanyang li-tubes tse bataletseng le mapheoana hore a lutle-mokotla o tiileng{1}}ho fapana le mokhoa oa khale oa ho solder, o tiisa hore sebopeho se matla le ho sebetsa hantle.

Sesebelisoa sa Flux: Learo le tšesaane la aluminiamo-silicon (Al-Si) brazing flux (melting point ~ 577℃) e fafatsoa kapa e qoelisoa holim'a motsoako o kopantsoeng ho thibela oxidation nakong ea mocheso.

Ts'ebetso ea Vacuum Furnace: Konokono e beoa ka seboping sa vacuum (khatello<10⁻³ Pa) and heated to 580–620°C. At this temperature, the flux melts and flows along the tube-fin interfaces, while the aluminum base material remains solid. The vacuum environment eliminates air bubbles, ensuring uniform brazing.

Ho phodisa: Sebōpi se pholile butle (50-100℃/ hora) ho fokotsa khatello ea mocheso, ho thibela li-microcracks ho li-microchannels.

6. Cutting & Port Machining

Brazed core e sebetsoa ho kenya likou tsa khokahano bakeng sa phallo ea metsi.

Ho Seha Mokotla: A CNC saw seha konokono ho isa boholo ba sehlahisoa sa ho qetela (mohlala, 300×400 mm bakeng sa lihatsetsi tsa khoebo MCHEs), ka sehatsetsi se sebelisetsoang ho qoba mocheso{4}}o bakoang ke ho senyeha.

Ho Cheka Boema-kepeng & Ho Tlanya: Lipheletso tsa li-tubes tse bataletseng li phunngoa ho etsa likou tse ngata, ebe li kenngoa ho kenya likhoele (mohlala, M10 kapa 1/4 NPT) bakeng sa ho hokahanya likhoele tsa sehatsetsing. Lisebelisoa tsa ho senya li tlosa litelu tsa tšepe ho thibela li-block blockages.

7. Teko ea Khatello & Ho Fumana Leak

Li-MCHE li hloka ho lutla ka thata-tse tiileng (tse bohlokoa haholo bakeng sa lits'ebetso tsa sehatsetsi{1}joaloka AC kapa sehatsetsi).

Teko ea Khatello: The core is filled with high-pressure nitrogen (1.5–2 times the design working pressure, typically 2–3 MPa) and held for 30–60 minutes. Pressure gauges monitor for drops-any loss >0.01 MPa e bonts'a ho lutla.

Ho fumanoa ha Helium Leak: Bakeng sa{0}}mesebetsi e nepahetseng e phahameng (mohlala, automotive AC), helium mass spectrometry e sebelisoa ho bona ho lutla ha lintho tse nyane-(boikutlo ho fihla ho 1×10⁻⁹ Pa·m³/s).

8. Kalafo le ho Thibela-Tlhahiso ea ho Corrosion Coating (Ha u rata)

Bakeng sa li-MCHE tse sebelisoang libakeng tse thata (mohlala, leoatleng kapa{2}}litlhophiso tsa mongobo o phahameng), tšireletso e eketsehileng ea kutu e sebelisoa:

Kopo ea ho roala: Phenolic resin, epoxy, kapa fluoropolymer coatings ba fafatsoa kapa electrophoresed holim 'a mantlha. Botenya ba ho roala bo laoloa ho 20-50 μm ho leka-lekanya ho hanyetsa ha kutu le bokhoni ba ho fetisa mocheso.

Ho phekola: Motsoako o koahetsoeng o phehoa ka likhato tse 120-180 bakeng sa metsotso e 30-60 ho phekola ho roala, ho etsa sekhahla se teteaneng, se ke keng sa senyeha.

9. Tlhahlobo ea Boleng ea ho Qetela & Packaging

Comprehensive Testing: Bahlahlobi ba hlahloba litekanyo (ka mechine ea ho lekanya e hokahanyang), (bakeng sa mefokolo ea brazing e kang mapetsong kapa masala a phallang), 'me ba etsa liteko tse sa sebetseng tsa ho fetisa mocheso (ho sebelisa kotopo ea moea ho lekanya sekhahla sa phapanyetsano ea mocheso tlas'a maemo a tloaelehileng).

Sephutheloana: Li-MCHE tse tšoanelehang li phuthetsoe ka filimi e thibelang mongobo{{0}'me li phuthetsoe ka har'a foam{1}}li mabokose a mela ho thibela tšenyo nakong ea lipalangoang.

Ts'ebetso ena e netefatsa hore li-MCHE li fihlella litlhokahalo tse tiileng tsa ts'ebetso bakeng sa lits'ebetso tse joalo ka sehatsetsi sa khoebo, moea o futhumatsang likoloi, le lisebelisoa tsa HVAC-ho leka-lekanya ho sebetsa hantle, ho sebetsa ka thata, le ho tšepahala.

HYLITA e na le lisebelisoa tse ikemetseng tsa tlhahiso le likhoele tsa kopano, mehala ea tlhahiso ea brazing e ikemetseng, le mehala ea tlhahlobo ea helium e lutlang ka botlalo.

1. Lisebelisoa tsa Kopano tse Ikemetseng ka ho Feletseng

Mela ea Setempe e Iketselitsoeng ka Botlalo bakeng sa Likaroloana tsa BohlokoaE hlahisitseng keketseho ea 49% ea ts'epahalo ea boleng le ntlafatso ea 67% molemong oa phepelo ea{2}}ka likarolo tse sa tloaelehang.

Mehala ea Kopano e Felletseng ka ho Fetisisa ea LihlahisoaHo nolofaletsa matlafatso ea 51% molemong oa kopano le ho ntlafatsa botsitso ba boleng ho isa ho 99.8%.

2. Lisebelisoa tsa Brazing tse Iketselitsoeng ka Botlalo

Fully Automated Production Lines with Tunnel{0}}Type Brazing FurnacesE lebisang ho nyoloheng ea boleng ba boleng ba 53%, 'me sekhahla sa ho feta sa lihlahisoa tse feliloeng ka brazed se fihla ho 99.7%.

Mehala ea Tlhahiso ka Botlalo e nang le Vacuum Brazing FurnacesHo fihlella keketseho ea 57% ea ts'epahalo ea boleng, 'me sekhahla sa ho feta sa lihlahisoa tse phethiloeng se fihla ho 99.7%.

3. Lisebelisoa tsa Coating / Testing tse Felletseng ka ho Fetisisa

Ka ho Feletseng Automated Surface Coating Production LinesE fana ka ntlafatso ea 55% ea ts'epo ea boleng, 'me sekhahla sa ho feta sa lihlahisoa tse feliloeng se fihla ho 99.8%.

Mela ea Tlhahlobo ea Leak ea Helium e Ikemetseng ka ho Fetisisa100% ea lihlahisoa tsohle li etsoa tlhahlobo ea vacuum helium leak, ho netefatsa sekhahla sa 100% sa tlhahlobo ea ho lutla ha helium pele ho tsoalo.

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