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RFC6DS
RFC
The Double-Stage Semi-Hermetic Compressor RFC combines RFC’s expertise in quiet operation with advanced two-stage compression technology, delivering exceptional performance in ultra-low-temperature applications. This model addresses the key limitation of single-stage compressors—high discharge temperatures at low evaporation temperatures—by splitting compression into two stages, which reduces thermal stress on components and cuts energy use. Its compact design (15% smaller than other double-stage compressors of the same capacity) makes it suitable for space-constrained facilities, such as urban medical labs or small-scale frozen food plants, where deep cooling (down to -45℃) is required but floor space is limited. The semi-hermetic housing uses a gasket-sealed cover that prevents refrigerant leaks (leak rate < 0.1 g/year) and allows easy access for maintenance.
Two-Stage Compression: The low-pressure cylinder compresses refrigerant to an intermediate pressure of 0.32 MPa, then the high-pressure cylinder compresses it to 1.3 MPa (condensing pressure). This splits the total compression ratio into two smaller ratios (≤4:1 per stage), reducing valve wear and discharge temperature (kept below 85℃ at -35℃ evaporation).
Energy Efficiency: Achieves a COP of 1.9 at -35℃ evaporation temperature—this cuts energy costs by 18% compared to single-stage compressors of equivalent capacity (e.g., a single-stage 22 kW compressor uses 12.2 kW, while this model uses 11.6 kW). Over a year of 24/7 operation, this saves approximately 3,000 kWh.
Quiet Operation: Acoustic insulation glass wool around the cylinder block and optimized valve design reduce noise to ≤66 dBA—the lowest in its class for double-stage compressors. This makes it suitable for medical facilities (e.g., hospital labs) where quiet operation is critical for staff focus.
Comprehensive Protection: Equipped with oil level sensors (triggers alert if levels drop below 25%), high/low pressure switches (HP set to 1.5 MPa, LP set to 0.1 MPa), and phase protection (prevents motor damage from reverse phase or phase loss). All protections are linked to a digital controller that logs errors for troubleshooting.
Medical freezers for vaccine storage (-40℃): Stores COVID-19 vaccines, influenza vaccines, and other temperature-sensitive biologics, complying with CDC and FDA cold chain requirements (temperature monitoring every 10 minutes).
Industrial freeze-drying equipment: Cools freeze-dry chambers to -45℃ for pharmaceutical (e.g., protein powders) and food (e.g., instant coffee) applications, removing moisture via sublimation.
Deep-freeze cold storage (200-600 m³): Stores industrial raw materials (e.g., rubber compounds, metal powders) that require ultra-low temperatures to maintain stability, with capacity to handle 20+ tons of goods.
Seafood processing and storage facilities: Flash-cools freshly caught seafood (e.g., shrimp, scallops) from 10℃ to -25℃ in 45 minutes, preserving flavor and texture for export.
