Shanghai Hengping LW-3000 Compact Air-Cooled Circulating Chiller

Overview

The Shanghai Hengping LW-3000 is a compact, integrated air-cooled circulating chiller engineered for precision temperature control in laboratory and light industrial applications. Designed around a forced-convection heat exchange architecture—featuring a full-copper finned-tube evaporator and high-efficiency axial fans—the system delivers stable thermal management without requiring external water sources or chilled water infrastructure. Its operational principle relies on vapor-compression refrigeration, where R134a or an equivalent low-GWP refrigerant circulates through a sealed loop to absorb heat from the process fluid (typically deionized water or water-glycol mixtures), then dissipates it via ambient air convection. The unit maintains setpoint temperatures within ±0.5 °C across its 0–40 °C operating range, supporting continuous-duty operation with minimal thermal drift. Its small footprint (470 × 270 × 370 mm) and integrated pump/reservoir design make it suitable for benchtop integration with lasers, CNC spindles, spectrophotometers, vacuum pumps, and other heat-sensitive instrumentation requiring reliable, low-noise cooling.

Key Features

• Integrated air-cooled refrigeration system with copper-finned evaporator for enhanced thermal conductivity and long-term corrosion resistance
• Precision temperature control with digital PID regulation and real-time display of setpoint, actual temperature, and flow status
• Self-contained circulation pump delivering up to 10 L/min at 1 bar pressure, compatible with standard 8–10 mm OD tubing connections
• Dual-safety monitoring: flow interruption detection and over-temperature alarm with automatic compressor shutdown
• Energy-efficient operation with optimized fan speed control and low standby power draw (<15 W)
• Modular electrical interface supporting 220 V / 50 Hz input; optional voltage variants available upon request for international deployment
• 9-liter reservoir with level indicator and drain valve for easy maintenance and fluid replacement

Sample Compatibility & Compliance

The LW-3000 is compatible with aqueous coolants—including deionized water, 10–30% ethylene glycol solutions, and inhibited water-based heat transfer fluids—within pH 6.5–8.5 and conductivity <50 µS/cm. It meets general-purpose safety requirements per IEC 61010-1 (2010) for laboratory electrical equipment and complies with CE marking directives for EMC (2014/30/EU) and Low Voltage (2014/35/EU). While not certified for Class I Division 1 hazardous locations, its sealed refrigerant circuit and non-sparking motor design support use in standard ISO Class 7 cleanrooms and GMP-aligned QC laboratories. For regulated environments, the unit supports manual log generation and can be incorporated into GLP/GMP workflows when paired with external data acquisition systems meeting FDA 21 CFR Part 11 audit trail requirements.

Software & Data Management

The LW-3000 operates via an embedded microcontroller with local push-button interface and LED display—no proprietary software or driver installation required. All operational parameters (setpoint, real-time temperature, pump status, alarm history) are accessible directly on-device. For integration into centralized lab monitoring networks, analog 0–10 V or 4–20 mA output signals (optional configuration) enable connection to PLCs, SCADA systems, or building management platforms. Data logging requires external hardware; however, the unit’s stable thermal performance and repeatable setpoint response support validated calibration protocols per ASTM E220, ISO/IEC 17025, and USP analytical instrument qualification frameworks.

Applications

• Cooling of CO₂ laser tubes (up to 80 W output, <60% wall-plug efficiency) in engraving and cutting systems
• Thermal stabilization of CNC spindle motors (dual-unit configuration supports two 1.5 kW spindles)
• Heat removal from UV-Vis spectrophotometer Peltier elements and detector housings
• Temperature regulation of rotary evaporator condensers and vacuum pump jackets
• Supporting controlled exothermic reactions in jacketed glass reactors (when used with external heat exchanger loops)
• Continuous cooling of plasma cleaning systems and RF generators in semiconductor R&D setups

FAQ

What is the maximum allowable coolant temperature rise across the chiller’s heat exchanger?
Under nominal load, the unit sustains a ΔT of ≤2.5 °C between inlet and outlet at 10 L/min flow rate and 50 W/°C cooling capacity.
Can the LW-3000 operate continuously at 40 °C ambient temperature?
Yes—it is rated for continuous operation in ambient environments up to 40 °C, provided minimum clearance (≥15 cm) is maintained around intake/exhaust vents for unrestricted airflow.
Is the reservoir compatible with biocide-treated water for extended microbial control?
Only non-oxidizing, non-foaming biocides approved for copper-alloy wetted parts may be used; consult coolant manufacturer documentation prior to dosing.
Does the unit include RS-485 or Modbus communication capability?
Standard configuration does not include digital communications; Modbus RTU interface is available as a factory-installed option (specify at time of order).
What maintenance intervals are recommended for optimal long-term reliability?
Inspect air filters quarterly; clean evaporator fins annually with compressed air; verify refrigerant charge and pump seal integrity every 24 months under continuous operation.