| 1 | Sheet-Metal Stamping Press | Blanking, piercing, bending, and forming of cabinet panels and brackets | Typical nominal force: 25–250 tonnes; production speed depends on die design and part geometry | Indoor units, outdoor-unit panels, mounting brackets, and structural components | ISO 12100 for machinery risk assessment; press guarding and two-hand controls are commonly applied |
| 2 | Tube-Bending Machine | Controlled bending of copper and aluminum refrigeration tubing | Typical tube diameter range: approximately 4–22 mm; programmable bend angle commonly reaches ±0.1° to ±0.5° | Evaporator, condenser, suction, discharge, and liquid-line assemblies | Dimensional inspection and prevention of tube flattening or unacceptable bend radius |
| 3 | Tube-End Forming and Expansion Machine | Expanding, flaring, reducing, and shaping tube ends for heat-exchanger assembly | Typical tooling is designed for copper or aluminum tubes from about 5–16 mm; cycle time varies by forming sequence | Heat-exchanger headers, return bends, and connection points | Joint dimensional control is essential for brazing quality and refrigerant tightness |
| 4 | Fin-Press and Heat-Exchanger Assembly Line | High-speed fin stamping followed by tube insertion, expansion, and header assembly | Typical fin thickness: about 0.08–0.20 mm; tube pitch commonly falls within approximately 19–32 mm | Evaporators and condensers for split, packaged, and commercial systems | Leak testing, fin-spacing inspection, and heat-transfer surface consistency |
| 5 | Automatic Brazing and Welding System | Joining copper tubing, steel components, and refrigeration circuit connections | Controlled gas flow, temperature, and torch position; inert-gas purging is commonly used for copper tube brazing | Refrigeration circuits, compressor connections, valves, and heat exchangers | ISO 13585 for brazing personnel qualification; joint strength and cleanliness are key controls |
| 6 | Vacuum Evacuation and Refrigerant Charging Station | Moisture removal, deep evacuation, refrigerant charging, and electronic weighing | Typical weighing resolution: 1–10 g; target vacuum levels depend on system volume and process specification | Residential and light-commercial air-conditioning production lines | IEC 60335-2-40 and applicable refrigerant-handling requirements; recovery and ventilation controls may be required |
| 7 | Refrigerant Leak-Test System | Helium, hydrogen-nitrogen, pressure-decay, or tracer-gas testing of sealed circuits | Detection capability depends on the method; helium systems can reach very low leak-rate thresholds under controlled conditions | Completed indoor units, outdoor units, compressors, and brazed assemblies | ISO 14903 provides methods for assessing leakage of refrigerating components and joints |
| 8 | Electrical Safety and Performance Test Bench | Insulation resistance, dielectric withstand, grounding continuity, input power, and functional testing | Test voltage, current, and timing are configured according to the product design and applicable market standard | Room air conditioners, heat pumps, inverter units, and packaged systems | IEC 60335-1 and IEC 60335-2-40 are widely used references for household and similar air-conditioning equipment |
| 9 | Functional Performance Test Chamber | Cooling, heating, airflow, power-consumption, noise, and control-function verification | Temperature and humidity ranges are selected to reproduce rated and extreme operating conditions; chamber size depends on unit type | Split systems, variable-speed units, heat pumps, and commercial air conditioners | ISO 5151 is a commonly referenced standard for non-ducted air conditioners and heat pumps |
| 10 | End-of-Line Assembly and Traceability System | Final assembly, screw fastening, labeling, barcode recording, packaging, and production-data collection | Torque-controlled fastening commonly uses programmable tools; traceability can record serial number, test results, and operator data | All air-conditioner product families and mixed-model production lines | ISO 9001 quality-management practices and documented calibration of measurement equipment |