Microchannel Coils (Mches) siam dan tur .

MCHES siamchhuah hi precision-diven process a ni a, chu chuan material science, extrusion molding, leh thermal joining technology te a inzawm khawm a, ultra-small flow channels (0.1–2 mm) siam tura siam niin heat transfer tha tak a ni. A pawimawh ber chu hetiang hi a ni:

1. Aluminum alloy hmanrua siam dan .

MCHes hian aluminum alloy (eg, 3003, 6061) an hmang ber a, chu chu an rit lo, thermal conductivity sang tak, leh an man tlawm vang a ni-effectiveness vang a ni.

Material thlan chhuah .: High-purity aluminum ingots te hi alloying elements (magnesium, silicon) te nen an inhmeh a, chu chuan mechanical strength leh corrosion resistance a tichak a, ASTM B209 emaw EN 573-3 standards a tlin a ni.

Preprocessing tih a ni.: ingot surface te chu degreased (alkaline cleaner hmangin) leh pickled ( dilute nitric acid hmanga) te chu oxide, oils, emaw impurities te paih chhuah nan-Critical for ensure uniform extrusion and brazing quality later.

2. Microchannel Flat Tube Extrusion .

He step hian MCHES "core" a siam a: flat tubes chu parallel microchannel tam tak neiin a siam a.

Extrusion setup 1000 a ni.: Heated aluminum alloy billet (450–500℃) chu hydraulic press hmangin precision-engineered die (microchannel- ang chi cavities nei) hmangin an nawr a. Die design hian direct takin channel size a tichiang a (typically .<1 mm for high-efficiency models) and distribution.

A lian leh te calibration .: Extruded flat tube chu dimensional stability vawng reng turin rang takin (air emaw water quenching hmangin) a lum a, chutah chuan a sei zawng (0.5 m atanga 6 m atanga 6 m thleng, a hman dan azirin) a tan a ni.

Quality check .: Laser micrometers chuan channel diameter, wall thickness, leh flatness-tolerances te chu ±0.02 mm chhungin control a ni tih a finfiah a, chu chu flow resistance insum theih lohna a awm loh nan a ni.

3. Fins stamping & forming .

Flat tube-ah hian fins dahin heat transfer surface area (MCHE efficiency-a key factor) tihzauh a ni.

Stamping kalpui dan tur .: Aluminum sheet (0.1–0.2 mm thick) te chu precision stamping press-ah an dah a, fin pattern siam dan-common design-ah chuan louvered fins (enhanced airflow turbulence atan) emaw corrugated fins (compactness atan) emaw a tel a ni.

Pre-Coating hmanga enkawlna .: Fins te hian brazing flux hmanga adhesion siam that nan leh post-brazing corrosion resistance tihchak nan surface treatment (eg, chromate conversion coating) an tawk thei.

4. Core assembly (tube-Fin stacking) a ni.

Flat tube leh fins te chu "heat exchanger core"-a bulpui ber functional unit ah an inzawm khawm a.

Layered stacking a ni a.: Flat tubes chu parallel-in a inzawm a, fins chu a kianga tube awm inkar ah dahin sandwich-sang tak structure a siam a. Temporary clamps hian assembly chu a hmunah a vawng tlat a, chu chuan misalignment a awm loh nan a pui a ni.

Gap control a ni a .: Tube leh fin inkar gap chu 100-ah dah a ni.<0.05 mm to ensure full contact during brazing, minimizing thermal resistance at the interface.

5. Vacuum brazing (thermal joining) .

Vacuum brazing hi flat tubes leh fins te chu leak-tight core-traditional soldering ang lo takin, structural strength leh thermal conductivity sang tak a awm theih nan a nghet taka inzawm tirtu step pawimawh tak a ni.

Flux hman dan tur .: Aluminum layer te tak te-silicon (Al-Si) brazing flux (melting point ~577℃) chu assembled core-ah spray emaw dip emaw a, heating laiin oxidation a awm loh nan.

Vacuum furnace siam dan tur .: A core chu vacuum furnace (pressure 10) ah dah a ni.<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.

Cooling .: Furnace chu thermal stress tihziaawmna turin zawi zawiin (50–100℃/hour) a lum a, microchannel-a microcrack awm tur a veng thei a ni.

6. Cutting & Port Machining .

Brazed core hi fluid inlet/outlet atana connection port add theih nan process a ni.

Core cutting 1000 a ni.: CNC saw chuan core chu a tawp bera product size (eg, 300×400 mm for commercial freezer MCHES) thlengin a cut a, coolant hmangin heat-induced deformation a awm loh nan.

Port drilling leh tapping te pawh a awm bawk.: Flat tubes tawp te chu drilled niin manifold ports siam a ni a, chu chu tap a, refrigerant line connect na tur threads (eg, M10 emaw 1/4 NPT) te dah belh a ni. Deburring Tools Channel blockage awm loh nan metal shavings te chu paih chhuak rawh.

7. Pressure Testing & Leak hriat theihna .

MCHes hian leak strict-tightness (refrigerant- ac emaw refrigeration emaw ang chi application atana hman tur a ni) a mamawh a ni.

Pressure test a ni a .: 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 hian leak a nih thu a tarlang.

Helium leak hriat theihna .: High-precision application (eg, automotive AC) tan chuan helium mass spectrometry hmangin micro-leaks (sensitivity chu 1×10⁻⁹M3/s thlenga tlahniam) hriat theih a ni.

8. Lei chung enkawlna & anti-Corrosion coating (a duh chuan)

Harsh environment-a hman MCHes (eg, marine emaw high-humidity settings)-ah chuan corrosion protection dang hman a ni:

Coating hman dan tur .: Phenolic resin, epoxy, emaw fluoropolymer coatings te chu core surface-ah spray emaw electrophorese emaw a ni. Coating thickness hi 20–50 μm-ah control a ni a, corrosion resistance leh heat transfer efficiency balance a ni.

Curing a awm em .: Coated core chu 120–180 degree-ah minute 30–60 chhung bak a ni a, chu chuan coating chu a tidam a, dense, impermeable layer a siam a ni.

9. Final Quality Inspection & Packaging .

Testing kimchang tak neih a ni ang.: Inspector-te chuan dimensions (coordinate tehna machine hmangin), (crack emaw flux residue emaw ang chi brazing defect-te tan) an check a, random heat transfer efficiency test an nei bawk (standard condition hnuaia heat exchange rate tehna atan wind tunnel hmangin).

Packaging a awm em .: MCHes qualified te chu moisture-proof film ah wrapped an ni a, foam ah an pack a, an phurh chhuah laiin chhiatna an thlen loh nan an lined carton te an dah tel bawk.

Hetiang kalphung hian MCHes hian application hrang hrang, commercial refrigeration, automotive air conditioning, leh HVAC systems-Balances efficiency, compactness, leh reliability te atana performance requirement khauh tak a tlin theih nan a enkawl a ni.

Hylita-ah hian fully automated production leh assembly lines, fully automated brazing production lines, leh fully automated helium leak testing lines te dah a ni.

1. Assembly hmanrua zawng zawng automated .

Key component hrang hrang tan fully automated stamping line a awm bawk.chu chuan quality reliability 49% a tisang a, non-standard components supply efficiency-ah 67% a tisang bawk.

Fully automated a siam zawh tawh a ni.Assembly efficiency-a 51% tihpun theihna leh quality stability 99.8%-a tihsan theihna tur.

2. A automated brazing hmanrua zawng zawng a awm vek .

Tunnel hmanga siam chhuah theihna line kimchang-Type brazing furnaces .Quality reliability 53% zetin a sang a, brazed finished products pass rate chu 99.7% a ni.

Fully automated production lines te chu vacuum brazing furnace nen a awm a.Quality reliability 57% a sang thei a, brazed finished products pass rate chu 99.7% a tling.

3. A automated coating/testing hmanrua kimchang tak .

Fully automated surface coating siam chhuahna line .Quality reliability-ah 55% zetin hmasawnna a thlen a, coated finished products pass rate chu 99.8% a tling.

A rilru a buai em em a, a rilru a hah em em bawk a.Product zawng zawng zinga 100% chuan vacuum helium leak test an nei a, hei hian delivery hmain helium leak testing atan 100% qualification rate a pe thei a ni.

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