Enkola y’okukola koyilo za microchannel (MCHE) .

Okukola MCHES ye nkola entuufu-egololwa egatta ssaayansi w’ebintu, okubumba okufuluma, ne tekinologiya ow’okugatta ebbugumu, ekoleddwa mu ngeri ey’enjawulo okukola emikutu gy’okukulukuta emitono ennyo (0.1–2 mm) okusobola okutambuza ebbugumu mu ngeri ennungi. Emitendera emikulu giri bwe giti:

1. Okuteekateeka ebintu bya aluminiyamu aloy .

MChEs okusinga zikozesa aluminiyamu alloys (okugeza, 3003, 6061) olw’obuzito bwazo obutono, obutambuzi bw’ebbugumu obw’amaanyi, n’omuwendo-obulungi.

Okulonda ebintu .: Ingots za aluminiyamu eza waggulu-Obulongoofu zitabulirwamu ebintu ebikola aloy (magnesium, silicon) okutumbula amaanyi g’ebyuma n’okuziyiza okukulukuta, okutuukiriza emitendera gya ASTM B209 oba EN 573-3.

Okusooka okukola .: Ebitundu bya INGOT biggibwamu (nga bakozesa ebyuma ebiyonja alkaline) era nga bisiigiddwa (nga biriko asidi wa nitric omutono) okuggyawo okisayidi, amafuta, oba obucaafu-obukulu okukakasa okufuluma okw’enjawulo n’omutindo gw’okusiba ebikonde oluvannyuma.

2. Okufulumya ttanka ya microchannel flat tube .

Omutendera guno gukola "core" ya mches: flat tubes nga zirina microchannels eziwera ezikwatagana.

Okuteekawo okufuluma .: Ekipande kya aluminiyamu ekibuguma (450–500℃) kinyigirizibwa okuyita mu precision-engineered die (nga microchannel-ebituli ebifaanagana) nga biyita mu press press. Dizayini ya die esalawo butereevu obunene bw’omukutu (mu ngeri entuufu .<1 mm for high-efficiency models) and distribution.

okupima obunene .: Tubu ya fulaati efulumiziddwa (extruded flat tube) enyogozeddwa mangu (nga eyita mu mpewo oba amazzi agazikidde) okukuuma ebipimo by’ebipimo, olwo n’esala okutuuka ku buwanvu obwetaagisa (okuva ku mmita 0.5 okutuuka ku mita 6, okusinziira ku kusiiga).

Okukebera omutindo .: Laser micrometers zikakasa diameter y’omukutu, obuwanvu bw’ekisenge, n’obuwanvu-okugumira kufugibwa mu mm ±0.02 okwewala obutakwatagana obuziyiza okukulukuta.

3. FINS Okukuba sitampu & okukola .

Ebiwaawaatiro byongerwa mu ttanka ezipapajjo okugaziya ekitundu eky’okungulu eky’okutambuza ebbugumu (ensonga enkulu mu kukola obulungi kwa MCHE).

Enkola y'okukuba sitampu .: Ebipande bya aluminiyamu (0.1–0.2 mm thick) biriisibwa mu precision stamping press okukola fin patterns-Enkola eza bulijjo mulimu louvered fins (for enhanced airflow turbulence) oba corrugated fins (for compactness).

Pre-Okulongoosa obujjanjabi .: Ebiwaawaatiro biyinza okuyita ku ngulu (okugeza, chromate conversion coating) okulongoosa adhesion ne brazing flux n’okutumbula post-okuziyiza okukulukuta.

4. Okukuŋŋaana kw'omusingi (tube-Okuteeka mu nkola) .

Flat tubes ne fins zikuŋŋaanyizibwa mu "heat exchanger core"-ekitundu ekikulu ekikola.

Layered stacking .: Tubu ezipapajjo zikwatagana mu parallel, nga ebiwaawaatiro biyingiziddwa wakati wa ttanka eziriraanye okukola sandwich-ensengekera eringa. Ebikwaso eby’ekiseera bikwata Olukiiko mu kifo okuziyiza okutakwatagana.

Okufuga ebituli .: Ekituli wakati wa tubes ne fins kikuumibwa ku .<0.05 mm to ensure full contact during brazing, minimizing thermal resistance at the interface.

5. Okufuuwa empewo (Okugatta ebbugumu) .

Vacuum brazing gwe mutendera omukulu ogukwatagana enkalakkalira fulaati n’ebiwaawaatiro mu kuvuunika-omusingi ogutali guyingira-obutafaananako soldering ey’ennono, ekakasa amaanyi g’enzimba amangi n’obutambuzi bw’ebbugumu.

Okukozesa Flux .: oluwuzi olugonvu olwa aluminiyamu-silikoni (Al-SI) brazing flux (okusaanuusa ekifo ~577℃) kifuuyirwa oba okunnyika ku core ekuŋŋaanyiziddwa okuziyiza oxidation mu kiseera ky’okubuguma.

Okulongoosa ekikoomi mu vacuum .: Omusingi guteekebwa mu kyokero ekitaliimu kintu (Pressure .<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.

Okunyogoza .: Ekikoomi kinyogozeddwa mpola (50–100℃/hour) okukendeeza ku kunyigirizibwa kw’ebbugumu, okuziyiza microcracks mu microchannels.

6. Okusala & Port Machining .

Omusingi ogukoleddwa mu brazed gukolebwako okwongera ku myalo gy’okuyunga ku mazzi agayingira/okufuluma.

Okusala omusingi .: CNC yalaba omusingi okutuuka ku sayizi y’ekintu ekisembayo (okugeza, 300×400 mm ku firiiza mches ez’ettunzi), nga coolant ekozesebwa okwewala ebbugumu-okukyukakyuka okuleetebwa.

Okusima n'okukuba ebifaananyi ku mwalo .: Enkomerero za ttanka ezipapajjo zisimibwa okukola emikutu gya manifold, oluvannyuma ne giteekebwako emikono okugattako obuwuzi (okugeza, M10 oba 1/4 NPT) okuyunga layini z’amazzi agafuumuula. Ebikozesebwa mu kuggyamu ebyuma biggyawo ebikuta by’ebyuma okuziyiza okuzibikira emikutu.

7. Okugezesa puleesa & okuzuula okukulukuta .

MCHE zeetaaga okuvuba okukakali-tightness (critical for refrigerant-okusinziira ku nkola nga AC oba firiigi).

Okugezesa puleesa .: 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 eraga nti waliwo okukulukuta.

Okuzuula okukulukuta kwa Helium .: Ku nkola ya waggulu-obutuufu (okugeza, AC ey’emmotoka), helium mass spectrometry ekozesebwa okuzuula micro-okukulukuta (sensitivity down to 1×10⁻ ⁹ pa·m3/s).

8. Okulongoosa kungulu & Anti-Okusiiga okukulukuta (Optional) .

Ku MCHE ezikozesebwa mu mbeera enzibu (okugeza, eby’omu nnyanja oba ebya waggulu-obunnyogovu), okukuuma okukulukuta okw’enjawulo kukozesebwa:

Okusiiga okusiiga .: Ebizigo bya phenolic resin, epoxy, oba fluoropolymer bifuuyirwa oba okufuuyirwa amasannyalaze ku ngulu w’omutwe. Obugumu bw’okusiiga bufugibwa ku 20–50 μm okusobola okutebenkeza okuziyiza okukulukuta n’obulungi bw’okutambuza ebbugumu.

Okuwonya .: Omusingi ogusiigiddwa gufumbibwa ku 120–180℃okumala eddakiika 30–60 okuwonya ekizigo, ne kikola oluwuzi olunene, olutayitamu.

9. Okukebera n’okupakinga omutindo ogusembayo .

Okugezesa okujjuvu .: Abakebera bakebera ebipimo (nga bayita mu byuma ebipima ensengekera), (olw’obulema obw’ekika kya brazing nga enjatika oba ebisigaddewo ebikulukuta), n’okukola okugezesa okutambuza ebbugumu mu ngeri ey’ekifuulannenge (nga bakozesa omukutu gw’empewo okupima omuwendo gw’okuwanyisiganya ebbugumu mu mbeera eza bulijjo).

Okupakinga .: MCHE ezirina ebisaanyizo zizingibwa mu bunnyogovu-obukakafu era ne bupakibwa mu foam-katoni eziriko ennyiriri okuziyiza okwonooneka mu kiseera ky'okutambuza.

Enkola eno ekakasa nti MCHE zituukana n’ebisaanyizo ebikakali ku nkola y’emirimu nga firiigi ez’ettunzi, ebyuma ebifuuwa empewo mu mmotoka, n’enkola za HVAC-okugeraageranya obulungi, okubeera enzito, n’okwesigamizibwa.

Hylita eriko layini z’okufulumya n’okuzikuŋŋaanya mu ngeri ey’otoma mu bujjuvu, layini ezikola mu ngeri ya otomatiki mu bujjuvu, ne layini ezigezesa okukulukuta kwa heliyamu mu bujjuvu.

1. Ebikozesebwa mu kukuŋŋaanya mu bujjuvu mu ngeri ey’otoma .

Layini ezikuba sitampu ezikola mu bujjuvu ku bitundu ebikulu .ekivaamu okweyongera kwa 49% mu kwesigika kw’omutindo n’okulongoosa ebitundu 67% mu bulungibwansi bw’okugaba ebintu ebitali-omutindo.

Layini z’ebintu eziwedde okukolebwa mu ngeri ey’otoma mu bujjuvu .okusobozesa okutumbula obulungi ebitundu 51% mu kukuŋŋaanya n’okulongoosa obutebenkevu bw’omutindo okutuuka ku bitundu 99.8%.

2. Ebikozesebwa mu kukola brazing mu bujjuvu .

Layini ezifulumya mu bujjuvu nga zirina omukutu-Ekikoomi eky’ekika kya brazing .ekivaako okwesigika okw’omutindo okulinnya ebitundu 53%, ng’omuwendo gw’okuyita kw’ebintu ebiwedde ebikoleddwa mu brazed gutuuse ku bitundu 99.7%.

Lines ezikola mu bujjuvu nga zirina ebyuma ebikuba ebikonde (vacuum brazing furnaces) .Okutuuka ku kweyongera kwa 57% mu kwesigika kw’omutindo, ng’omuwendo gw’okuyita kw’ebintu ebiwedde mu brazed gutuuse ku bitundu 99.7%.

3. Ebikozesebwa mu kusiiga/okugezesa mu bujjuvu mu ngeri ey’otoma .

Layini ezikola okusiiga ku ngulu mu bujjuvu .Okutuusa enkulaakulana ya bitundu 55% mu kwesigika kw’omutindo, ng’omuwendo gw’okuyita ogw’ebintu ebiwedde okusiigibwa gutuuse ku bitundu 99.8%.

Fully automated vacuum helium okuvuba layini .Ebitundu 100% ku bintu byonna biyita mu kukebera okukulukuta kwa vacuum helium, okukakasa nti 100% qualification rate for helium leak testing nga tebannaba kutuusa.

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