Inqubo Yokukhiqiza Yamakhoyili Amancane Amashaneli (MCHEs)
Ukukhiqizwa kwama-MCHE kuyinqubo eshayelwa ukunemba-ehlanganisa isayensi yezinto ezibonakalayo, ukubumba i-extrusion, kanye nobuchwepheshe bokujoyina obushisayo, obukhelwe ukudala amashaneli agelezayo ama-ultra (0.1–2 mm) ukuze kudluliselwe ukushisa okusebenzayo. Izinyathelo ezibalulekile zimi kanje:
1. Aluminium Alloy Material Ukulungiselela
Ama-MCHE ngokuyinhloko asebenzisa ama-alloys e-aluminium (isb, 3003, 6061) ngenxa yesisindo sawo esingasindi, izinga eliphezulu le-thermal conductivity, kanye{4}}nokusebenza kahle kwezindleko.
Ukukhetha Okubalulekile: Ama-ingots e-aluminium{0}emsulwa aphezulu axutshaniswa nezinto ze-alloying (i-magnesium, i-silicon) ukuze kuthuthukiswe amandla emishini nokumelana nokugqwala, okuhlangabezana namazinga we-ASTM B209 noma we-EN 573-3.
Iyacubungula: Indawo ye-ingot iyasuswa amafutha (kusetshenziswa izihlanzi ze-alkaline) futhi zifakwe emanzini anosawoti (nge-nitric acid ehlanjululwe) ukuze kukhishwe ama-oxide, uwoyela, noma ukungcola{0}}okubalulekile ukuze kuqinisekiswe ukukhishwa okufanayo kanye nekhwalithi yokubhuqa kamuva.
2. I-Microchannel Flat Tube Extrusion
Lesi sinyathelo sakha "umnyombo" wama-MCHE: amashubhu ayisicaba anama-microchannel amaningi ahambisanayo.
Ukusethwa kwe-Extrusion: I-heated aluminium alloy billet (450–500℃) iphushwa ngokunemba{2}}nge-engineered die (ene-microchannel{3}}imigodi emise okwezimbotshana) ngomshini wokunyathelisa we-hydraulic. Idizayini yefa inquma ngokuqondile usayizi wesiteshi (imvamisa<1 mm for high-efficiency models) and distribution.
Ukulinganisa Usayizi: Ithubhu eyisicaba ekhishweyo ipholiswa ngokushesha (ngomoya noma ukucisha amanzi) ukuze kugcinwe ukuzinza kwe-dimensional, bese isikwa ubude obudingekayo (kusuka ku-0.5 m kuya ku-6 m, kuye ngokuthi isicelo).
Ukuhlola Ikhwalithi: Ama-micrometer e-laser aqinisekisa ububanzi besiteshi, ukujiya kodonga, nokubekezelelana-nobucaba kulawulwa phakathi kuka-±0.02 mm ukuze kugwenywe ukungqubuzana kokumelana nokugeleza.
3. I-Fins Stamping & Forming
Amaphiko engezwa kumashubhu ayisicaba ukuze kwandiswe indawo yokudlulisa ukushisa (isici esibalulekile ekusebenzeni kahle kwe-MCHE).
Inqubo yokugxiviza: Amashidi e-Aluminium (ubukhulu obungu-0.1–0.2 mm) afakwa emshinini wokunyathelisa onembayo ukuze adale amaphethini ama-fin{2}}imiklamo evamile ihlanganisa amaphiko a-louvered (okuthuthukisa ukugeleza komoya) noma izimpiko zikathayela (ukuze zihlangane).
Ngaphambi-Ukwelashwa Kwe-Coating: Amaphiko angase aphathwe ngaphezulu (isb, ukuguqulwa kwe-chromate) ukuze kuthuthukiswe ukunamathela nge-brazing flux kanye nokuthuthukisa{2}}ukumelana nokubola kwe-brazing.
4. I-Core Assembly (I-Tube-I-Fin Stacking)
Amashubhu ayisicaba namaphiko ahlanganiswe abe "umgogodla wokushintsha ukushisa"{0}}iyunithi eyisisekelo yokusebenza.
I-Layered Stacking: Amashubhu ayisicaba aqondaniswe ngokuhambisana, afakwe amaphiko phakathi kwamashubhu ancikene ukuze akhe isangweji{0}}elifana nesakhiwo. Ama-clamps esikhashana abamba umhlangano ukuze ugweme ukungahambi kahle.
Ukulawula Igebe: Igebe phakathi kwamashubhu namafins ligcinwa likhona<0.05 mm to ensure full contact during brazing, minimizing thermal resistance at the interface.
5. I-Vacuum Brazing (Ukujoyina okushisayo)
I-vacuum brazing isinyathelo esibalulekile esihlanganisa unomphela amashubhu ayisicaba kanye nezimpiko zibe indawo evuzayo-eqinile{1}}ngokungafani nokusoda okuvamile, kuqinisekisa amandla aphezulu esakhiwo kanye nokuhamba kahle kwe-thermal.
Isicelo se-Flux: Ungqimba oluncane lwe-aluminium-i-silicon (Al-Si) i-brazing flux (iphoyinti elincibilikayo ~577℃) luyafafazwa noma lucwiliswe kumongo ohlanganisiwe ukuze kuvinjelwe i-oxidation ngesikhathi sokushisisa.
I-Vacuum Furnace Processing: Ingqikithi ifakwa esithandweni sevacuum (ingcindezi<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.
Ukupholisa: Isithando somlilo sipholile kancane (50-100℃/ ihora) ukunciphisa ukucindezeleka okushisayo, ukuvimbela ama-microcracks kuma-microchannels.
6. Cutting & Port Machining
I-brazed core icutshungulwa ukuze kwengezwe izimbobo zokuxhuma zokungenisa/okuphumayo okuwuketshezi.
Ukusika Okuyinhloko: Isaha ye-CNC isika umongo uye kusayizi wokugcina womkhiqizo (isb., 300×400 mm wama-MCHE wamafriji entengiso), ngesibandisi esisetshenziselwa ukugwema ukushisa{4}}okubangelwa ukonakala.
Ukubhoboza Embotsheni Nokuthepha: Iziphetho zamashubhu ayisicaba ziyabhora ukwenza izimbobo eziningiliziwe, bese zithepha ukuze kwengezwe imicu (isb, i-M10 noma i-1/4 NPT) yokuxhuma imigqa yesiqandisi. Amathuluzi okukhipha insimbi asusa ukushefa kwensimbi ukuvimbela ukuvinjwa kweziteshi.
7. Ukuhlola Ingcindezi & Ukutholwa Okuvuzayo
Ama-MCHE adinga ukuvuza okuqinile-okuqinile (okubalulekile ezinsizeni ezisekelwe efrijini{1}njenge-AC noma isiqandisi).
Ukuhlolwa Kwengcindezi: 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 >I-0.01 MPa ikhombisa ukuvuza.
Ukutholwa kokuvuza kwe-Helium: Ngohlelo lokusebenza-lokunemba okuphezulu (isb, i-automotive AC), i-helium mass spectrometry isetshenziswa ukuze kutholwe ukuvuza okuncane-(ukuzwela kuze kufike ku-1×10⁻⁹ Pa·m³/s).
8. Ukwelapha Okuphezulu Nokumelana-Ne-Corrosion Coating (Ongakukhetha)
Kuma-MCHE asetshenziswa ezindaweni ezinokhahlo (isb, izilungiselelo zasolwandle noma{2}}zomswakama ophezulu), ukuvikela ukugqwala okwengeziwe kuyasetshenziswa:
Uhlelo Lokuhlanganisa: I-Phenolic resin, i-epoxy, noma i-fluoropolymer coatings iyafafazwa noma ifakwe nge-electrophores endaweni ewumgogodla. Ukujiya kwe-coating kulawulwa ku-20-50 μm ukulinganisa ukumelana nokugqwala nokusebenza kahle kokudlulisa ukushisa.
Ukwelapha: Umgogodla oboshwe ubhakwa ku-120-180℃imizuzu engu-30-60 ukuze uphulukise ukugqoka, okwenza ungqimba oluqinile, olungenakunyakaziswa.
9. Ukuhlolwa Kwekhwalithi Yokugcina Nokupakishwa
Ukuhlola Okuphelele: Abahloli bahlola ubukhulu (ngemishini yokulinganisa yokuxhumanisa), (ngokulimala kokubhuqa okufana nokuqhekeka noma izinsalela ze-flux), futhi benze ukuhlola okungahleliwe kokusebenza kahle kokudlulisa ukushisa (besebenzisa umhubhe womoya ukukala izinga lokushisa ngaphansi kwezimo ezijwayelekile).
Ukupakisha: Ama-MCHE afanelekayo asongwa ngomswakama-ifilimu elifakazelayo futhi apakishwa emabhokisini anegwebu{1}}afakwe ulayini ukuze avimbele ukulimala ngesikhathi sokuthutha.
Le nqubo iqinisekisa ukuthi ama-MCHE ahlangabezana nezimfuneko zokusebenza eziqinile zezinhlelo zokusebenza ezifana nesiqandisi sezentengiso, isimo sezulu sezimoto, namasistimu e-HVAC-okulinganisa ukusebenza kahle, ukubumbana, nokwethembeka.
I-HYLITA ihlome ngemigqa yokukhiqiza neyokuhlanganisa ezenzakalela ngokugcwele, imigqa yokukhiqiza yokubhuqa ezenzakalelayo, kanye nemigqa yokuhlola ukuvuza kwe-helium ezenzakalelayo.
1. Izinsiza Zomhlangano Ezizenzakalelayo Ngokugcwele
Imigqa Yezitembu Ezenzakalelayo Yezingxenye EzibalulekileOkuholela ekukhuphukeni kwama-49% ekuthembekeni kwekhwalithi kanye nokuthuthuka okungama-67% ekusebenzeni kahle kokuhlinzeka{2}}kwezingxenye ezingajwayelekile.
Imigqa Yomhlangano Yomkhiqizo Oqediwe NgokugcweleUkunika amandla ukukhushulwa okungama-51% ekusebenzeni kahle komhlangano kanye nokwenza ngcono ukuzinza kwekhwalithi kuye kuma-99.8%.
2. Izisetshenziswa Ze-Brazing Ezizihambela Ngokugcwele
Imigqa Yokukhiqiza Ezenzakalelayo Ephelele Enomhubhe-Thayipha Ama-Brazing FurnacesOkuholela ekukhuphukeni kwekhwalithi ngo-53%, nezinga lokuphasa lemikhiqizo eqediwe eqinile lifinyelele ku-99.7%.
Imigqa Yokukhiqiza Esebenza Ngokugcwele Nezifudumezi Ze-Vacuum BrazingUkuthola ukwenyuka ngo-57% ekuthembekeni kwekhwalithi, nezinga lokuphasa lemikhiqizo eqediwe ye-brazed lifinyelela ku-99.7%.
3. Imishini Yokuhlola Okuzenzakalelayo Okuzenzakalelayo
Imigqa Yokukhiqiza Ye-Surface Coating Fully AutomatedIletha ukuthuthuka okungama-55% ekuthembekeni kwekhwalithi, nezinga lokuphasa lemikhiqizo eqediwe ehlanganisiwe lifinyelela ku-99.8%.
Imigqa Yokuhlola Ukuvuza Okuzenzakalelayo Okuzenzakalelayo Kwe-Vacuum HeliumI-100% yayo yonke imikhiqizo ihlolwa ukuvuza kwe-vacuum helium, okuqinisekisa izinga lokufaneleka elingu-100% lokuhlolwa kokuvuza kwe-helium ngaphambi kokulethwa.
Amashadi ashisayo: Umshini wokuwasha umshini wokuwasha umshini wokuwasha we-microchannel condenser, umshini wokuwasha waseChina umshini wokuwasha umkhiqizi we-microchannel condenser, abahlinzeki, imboni
