A leading global home appliance manufacturer specializing in refrigerators, freezers, and heat pumps faced growing complexity in their production lines. With a portfolio spanning both traditional and low‑GWP flammable refrigerants—including R600a, R290, R32, R1234ze, R1234yf, and R134a—the company needed a flexible, future‑proof charging solution.

Their existing single‑system machines required frequent reconfiguration, causing bottlenecks, calibration errors, and safety risks when switching between different refrigerants. Flammable working fluids demanded strict explosion‑proof protection, while high‑volume production required stable, repeatable cycle times. The client sought a unified system that could handle multiple refrigerant types safely, without compromising on speed or precision.

The manufacturer partnered with Chunmu Refrigeration to deploy the Dual‑System A3 CM8600(ExS) Explosion‑Proof Refrigerant Charging Machine, tailored to their multi‑refrigerant, high‑volume requirements:

• Supported Refrigerants: R600a, R290, R32, R1234ze, R1234yf, R134a and more
• Certifications: CE, ATEX, and ZJEx certified explosion‑proof design
• Power Supply: 380V / 50Hz
• Dual‑System Design: Independent charging circuits enable parallel processing or dual‑refrigerant operation
• Charging Speed: Up to 80g/s per channel, scalable for high‑speed assembly lines
• Charging Accuracy: ±1g (≤100g fills) / ±0.3% (>2000g fills)
• Core Features: Integrated evacuation, leak detection, and automatic charging with Siemens PLC control

The dual‑system architecture allowed the client to run two independent production streams or seamlessly switch between different refrigerant recipes without stopping the line.

1. Safety & Compliance for Multiple Flammable RefrigerantsHandling R290, R600a, and R32 required strict adherence to explosion‑proof standards. The CM8600’s fully certified ATEX design, isolated electrical controls, and dedicated safety monitoring eliminated risks of ignition and leaks. The dual‑system’s independent safety loops further ensured that operations with different flammable refrigerants did not interfere with each other, keeping the plant compliant with international safety regulations.
2. Production Flexibility & Line EfficiencyThe client previously used separate machines for different refrigerants, leading to long changeover times and underutilized equipment. The dual‑system CM8600 allows the same unit to handle multiple refrigerant types in parallel or sequentially, reducing floor space and eliminating downtime for reconfiguration. With both channels running simultaneously, the production line achieved a significant throughput increase without expanding the facility footprint.
3. Precision & Consistency Across All RefrigerantsDifferent refrigerants require specific charging parameters to ensure optimal performance. The machine’s pre‑set recipe library and high‑precision turbine flowmeters maintain consistent accuracy across all working fluids, reducing rejects caused by overcharging or undercharging. The result: fewer quality issues, lower rework rates, and stable product performance across the entire appliance range.

After installation and commissioning, the dual‑system CM8600 has become the centerpiece of the client’s main assembly line. The equipment’s stability, safety, and multi‑refrigerant flexibility have exceeded expectations.

The client’s engineering team commented:

This deployment demonstrates Chunmu’s ability to deliver advanced, multi‑refrigerant solutions that meet both today’s production demands and tomorrow’s regulatory and sustainability challenges.