The Smart Inverter Variable-Frequency Falling-film Screw Chiller is a high-efficiency industrial refrigeration solution engineered for large-scale B2B cooling demands, integrating advanced variable frequency technology and falling-film heat exchange design. This chiller adopts eco-friendly R134a refrigerant and a dual-compressor parallel system (one fixed + one variable), delivering 13% higher IPLV than conventional screw chillers while maintaining ultra-precise chilled water temperature control (5-15℃). Ideal for heavy industrial production, data center cooling and large commercial building HVAC systems, the R134a variable frequency falling-film chiller balances energy efficiency, reliability and environmental compliance, making it a cost-effective core equipment for industrial energy-saving transformation.
Filled with non-toxic, nonflammable R134a refrigerant, the unit meets global environmental standards with zero ozone depletion potential, eliminating safety hazards in industrial on-site operation.
The compressor’s Vi is flexibly adjustable, maintaining optimal compression efficiency across the entire operating range and driving the unit’s IPLV to reach up to 8.00 kW/kW.
With small bubble resistance and excellent oil return performance, the evaporator achieves higher heat exchange efficiency than traditional shell-and-tube types, and its 1.0MPa designed water pressure bearing capacity meets industrial heavy-duty operation requirements.
Inherits the high COP advantage of fixed-frequency units and the high IPLV merit of variable-frequency compressors, ensuring stable operation even in 24/7 continuous industrial working conditions.
Unit model | SLB870JV | SLB920JV | SLB980JV | SLB1050JV | SLB1150JV | SLB1230JV | SLB1330JV | SLB1420JV | SLB1530JV | ||
Nom-inal work-ing condition of refrig-eration | Nominal refrigerating capacity | kW | 873 | 925 | 985 | 1055 | 1154 | 1233 | 1332 | 1422 | 1531 |
104kcal/h | 75 | 80 | 85 | 91 | 99 | 106 | 115 | 122 | 132 | ||
Rated power | kW | 160 | 169 | 179 | 191 | 208 | 223 | 240 | 258 | 278 | |
COP | kW/kW | 5.45 | 5.47 | 5.50 | 5.52 | 5.54 | 5.52 | 5.55 | 5.51 | 5.50 | |
IPLV | kW/kW | 7.74 | 7.77 | 7.81 | 7.84 | 7.87 | 7.97 | 8.00 | 7.94 | 7.94 | |
Max. running current | A | 173+180 | 209+180 | 209+218 | 236+218 | 236+241 | 276+241 | 276+258 | 276+298 | 307+298 | |
Recommended wiring (copper core) | mm2 | 95+95 | 95+95 | 95+95 | 120+95 | 120+120 | 150+120 | 150+150 | 150+185 | 185+185 | |
Power supply | --- | 3/N/PE AC380/220V 50Hz | |||||||||
Safety protection | --- | High/low-pressure，oil level，safety valve，water cut-off delay，anti-freezing，motor overload，open-phase and phase sequence | |||||||||
Comp-ressor | Type | --- | Semi-hermetic screw type/12.5%~100% stepless variable frequency adjustment | ||||||||
Qty | Set | 2 | |||||||||
Evap-orator | --- | Falling film screw (designed bearing water pressure of 1.0MPa) | |||||||||
Water flow | m3/h | 150 | 159 | 169 | 181 | 198 | 212 | 229 | 245 | 263 | |
Water pressure drop | kPa | 60 | 60 | 60 | 60 | 62 | 62 | 62 | 65 | 65 | |
Cond-enser | Type | --- | Horizontal shell and tube type (designed bearing water pressure of 1.0MPa) | ||||||||
Water flow | m3/h | 188 | 199 | 212 | 227 | 248 | 265 | 286 | 306 | 329 | |
Water pressure drop | kPa | 66 | 66 | 66 | 66 | 70 | 70 | 70 | 70 | 72 | |
Refrigerant R134a charge Qty | kg | 240 | 250 | 255 | 260 | 270 | 280 | 290 | 300 | 310 | |
Unit weight | kg | 5050 | 5700 | 5950 | 6290 | 6400 | 6650 | 6950 | 7200 | 7400 | |
Operating weight | kg | 5500 | 6250 | 6500 | 6850 | 6950 | 7250 | 7450 | 7700 | 7900 | |
Site Preparation: Ensure a flat, load-bearing foundation (matching unit weight) with good ventilation; reserve maintenance space of at least 1.5m around the unit.
Core Component Installation: Fix the semi-hermetic screw compressor and falling-film evaporator with anti-vibration pads to reduce operational noise and vibration.
Piping Connection: Connect chilled water/cooling water pipelines in accordance with 1.0MPa pressure standards; install filters at water inlet to prevent pipeline blockage.
Electrical Wiring: Adopt copper core cables of the recommended specification (95+95 mm² for SLB920JV) and use iso-diameter wires from the same manufacturer; connect phase sequence correctly to avoid compressor damage.
Pre-Start Inspection: Check refrigerant charge, oil level and water pressure; test all safety protection functions (high/low pressure, anti-freezing, overload) before commissioning.
Heavy Manufacturing: Steel, non-ferrous metal smelting and auto parts production line cooling.
Data Center & IT Industry: Precision cooling for large cloud computing data centers with high heat density.
Pharmaceutical & Chemical: Constant temperature cooling for chemical reaction kettles and pharmaceutical clean rooms.
Commercial & Public Facilities: Central air conditioning for large shopping malls, high-rise office buildings and exhibition centers.
Food & Beverage: Large-scale cold storage and production line cooling for beverage and frozen food processing.
Refrigerant Customization: Support R410A refrigerant replacement for specific industrial working conditions.
Heat Recovery Upgrade: Add sensible heat (Hx) or total heat (H) recovery tubes to reuse waste heat for hot water supply.
Capacity Tailoring: Customize nominal refrigerating capacity according to on-site cooling load demands.
Modular Design: Provide modular (M) units for phased expansion of industrial production lines.
Wiring & Installation Adaptation: Customize cable specifications and installation brackets for special site conditions (e.g., high altitude, high humidity).
The outlet water temperature of chilled water is adjustable from 5℃ to 15℃, with ultra-high control precision to meet the strict temperature requirements of different industrial processes.
It is equipped with comprehensive protection, including high/low pressure protection, oil level monitoring, safety valve, water cut-off delay, anti-freezing, motor overload and open-phase/phase sequence protection.
The combination of adjustable Vi, stepless variable frequency compressor and dual-compressor parallel design optimizes the unit’s efficiency in partial load conditions, which is the core reason for the 13% higher IPLV than conventional compressors.
Chilled water flow is calculated by nominal refrigerating capacity × 0.172 m³/(h×kW) (7℃ outlet); cooling water flow is nominal refrigerating capacity × 0.215 m³/(h×kW) (30℃ inlet).
