Hengping LW-5000 Compact Air-Cooled Circulating Chiller

Overview

The Hengping LW-5000 is a compact, air-cooled circulating chiller engineered for precision thermal management in industrial and laboratory environments where space, reliability, and stable temperature control are critical. Designed around a closed-loop refrigeration cycle using R-134a—a non-ozone-depleting, low-global-warming-potential refrigerant—the system delivers consistent cooling capacity of 800 W at nominal conditions. Its thermodynamic architecture integrates a hermetic scroll or rotary compressor, copper-aluminum finned condenser with axial fan cooling, expansion valve, and brazed plate evaporator—optimized for high heat transfer efficiency and long-term operational stability. Unlike water-cooled chillers requiring external cooling towers or plumbing infrastructure, the LW-5000 operates autonomously with ambient air exchange, making it ideal for cleanrooms, laser integration cabinets, CNC machine tool enclosures, and benchtop analytical instrumentation.

Key Features

• High-precision digital temperature controller with dual-mode operation: PID-regulated constant-temperature mode and ramp-soak profiling mode for process-critical applications.
• Real-time monitoring and protection suite including compressor overcurrent detection, flow interruption alarm (via turbine or Hall-effect sensor), high/low temperature deviation alert, and compressor start-up delay (≥3 minutes) to prevent liquid slug and thermal shock.
• Three pump configuration variants (LW-5000G2, H2, I2) calibrated for distinct hydraulic loads: 10 L/min @ 10 m head, 13 L/min @ 12 m head, and 16 L/min @ 25 m head—enabling optimal matching to laser rod jackets, spindle jackets, or high-flow machining coolant loops.
• Corrosion-resistant 6-liter stainless-steel reservoir with level sensor, anti-spill baffle, and integrated air venting to eliminate vapor lock and ensure priming reliability.
• Front-panel interface with LED display, tactile membrane keys, and status LEDs for power, pump, compressor, alarm, and communication readiness—designed for glove-compatible operation in industrial settings.
• Robust mechanical construction: powder-coated steel chassis, vibration-damped compressor mount, and IP20-rated electrical enclosure compliant with IEC 61000-6-2/6-4 EMC standards.

Sample Compatibility & Compliance

The LW-5000 supports continuous circulation of deionized water, 20–30% ethylene glycol/water mixtures (for sub-5 °C operation), or other non-corrosive, low-conductivity coolants compatible with copper, brass, and stainless-steel wetted parts. It meets CE marking requirements under the Low Voltage Directive (2014/35/EU) and Electromagnetic Compatibility Directive (2014/30/EU). While not certified to UL 61010-1 or IEC 61010-1 out-of-the-box, its safety architecture—including thermal cutouts, pressure relief valves, and reinforced insulation—facilitates third-party certification for OEM integration into Class I medical or industrial laser systems. The unit complies with ISO 13849-1 PLc functional safety principles for its protective functions and supports traceable calibration per ISO/IEC 17025 when paired with external reference thermometers.

Software & Data Management

The LW-5000 operates as a standalone device with no embedded firmware-based data logging; however, its analog 0–5 V or 4–20 mA output signals (optional RS485 Modbus RTU interface available on custom orders) enable integration into SCADA, PLC, or LabVIEW-based supervisory systems. Temperature setpoint, actual bath temperature, pump status, and alarm flags can be polled at configurable intervals (1–10 s). For GxP-regulated environments, external validation protocols may document temperature uniformity (±0.1 °C across reservoir), stability (≤0.05 °C/h drift), and recovery time (<15 min from +35 °C to +25 °C after 50% load step change)—supporting IQ/OQ documentation aligned with FDA 21 CFR Part 11 requirements when paired with audit-trail-capable acquisition software.

Applications

• Cooling of CO₂ glass tube lasers (e.g., single-tube 80 W systems with >60% optical efficiency) requiring stable jacket temperatures between 18–22 °C to minimize thermal lensing and mode instability.
• Thermal regulation of high-speed electric spindles (up to 5 kW) in CNC machining centers, where localized heat flux exceeds 1.2 MW/m² and coolant temperature must remain within ±0.2 °C to preserve bearing preload and dimensional accuracy.
• Active cooling of solid-state diode-pumped lasers (5–10 W Nd:YAG or fiber-coupled modules), where junction temperature control directly affects wavelength stability and pulse-to-pulse energy repeatability.
• Support for laser material processing platforms—including marking, engraving, welding, and cutting systems—where chiller failure would result in immediate beam quality degradation or optics damage.
• Benchtop compatibility with spectrophotometers, X-ray diffractometers, and plasma etch sources requiring auxiliary cooling without facility water connections.

FAQ

What is the minimum ambient operating temperature for the LW-5000?
The unit is rated for ambient temperatures between 10 °C and 35 °C. Operation below 10 °C may cause refrigerant migration and oil foaming; optional crankcase heater kits are available for low-ambient installations.
Can the LW-5000 be used with pure ethanol or acetone?
No. Organic solvents degrade seals, gaskets, and pump impellers. Only water, water-glycol blends, or manufacturer-approved synthetic heat-transfer fluids are permitted.
Is remote ON/OFF control supported?
Yes—via dry-contact closure input (terminal block) or 0–10 V analog signal on models equipped with the optional industrial I/O module.
How often should the air filter be cleaned?
Under typical cleanroom or air-conditioned lab conditions, inspect and vacuum the condenser intake filter every 30 days; in dusty industrial environments, weekly inspection is recommended.
Does the LW-5000 meet RoHS compliance?
Yes—its PCB assemblies, wiring, and refrigerant conform to Directive 2011/65/EU Annex II substance restrictions, with full material declarations available upon request.