Tianfeng TF-LS-1.5 kW Compact Circulating Chiller

Overview

The Tianfeng TF-LS-1.5 kW Compact Circulating Chiller is an integrated, water-cooled thermal management system engineered for precision temperature stabilization of laboratory and industrial equipment requiring continuous, low-noise, and highly reproducible cooling. It operates on vapor-compression refrigeration principles—utilizing a scroll compressor, thermostatic expansion valve, condenser, evaporator, and refrigerant circuit—to maintain setpoint temperatures within ±0.1 °C across its operational range of 0–40 °C. Designed for seamless integration with heat-generating instrumentation—including atomic absorption spectrometers (GFAAS), ICP-OES and ICP-MS systems, XRF and XRD analyzers, SEM/TEM vacuum chambers, and laser-based material processing tools—the chiller delivers stable chilled water at flow rates up to 38 L/min and delivery pressures up to 2.0 bar. Its compact footprint (650 × 500 × 765 mm), stainless-steel fluid path, and robust mechanical architecture ensure long-term reliability in demanding 24/7 laboratory environments.

Key Features

• Integrated single-unit design with built-in 15 L stainless-steel reservoir, eliminating external tank dependencies
• High-efficiency scroll compressor (European/American origin) delivering stable 1.5 kW refrigeration capacity under standard conditions (chilled water inlet/outlet: 12/7 °C; ambient cooling air: 30/40 °C)
• Digital PID temperature controller with real-time display, adjustable setpoint resolution of 0.1 °C, and optional RKC (Japan) controller upgrade for enhanced stability and logging capability
• Multi-layer safety architecture: compressor overheat protection, high/low refrigerant pressure interlocks, overcurrent cutoff, and overtemperature alarm with fault signal output
• Corrosion-resistant wetted parts—including pump head, reservoir, and internal piping—all fabricated from 304 stainless steel to ensure compatibility with deionized water and mild coolant additives
• Adjustable flow and pressure: variable-speed circulation pump supports flow modulation from 0–38 L/min and pressure regulation up to 2.0 bar, enabling optimized thermal coupling with diverse instrument interfaces
• Low acoustic signature (<65 dB(A) at 1 m), suitable for placement inside analytical laboratories without compromising ambient noise requirements
• Compliance-ready architecture: electrical components meet IEC 61000-6-3 (EMC emission) and IEC 61000-6-2 (immunity); mechanical design aligns with ISO 13849-1 for functional safety of control systems

Sample Compatibility & Compliance

The TF-LS-1.5 kW chiller is compatible with a broad spectrum of laboratory instrumentation requiring active heat extraction from optical benches, RF generators, plasma sources, detector housings, and high-power laser diodes. Its 0–40 °C operating window supports both sub-ambient stabilization (e.g., for GFAAS graphite furnace cooling) and elevated-temperature maintenance (e.g., for controlled-dew-point operation in XRD humidity stages). Fluid compatibility includes deionized water, 10–30% ethylene glycol/water mixtures, and non-corrosive synthetic coolants—provided pH remains between 6.5 and 8.5. The unit meets CE marking requirements per Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. While not certified to UL or CSA standards out-of-the-box, its component-level compliance (Siemens/OMRON contactors, TÜV-certified compressors, RoHS-compliant PCBs) facilitates third-party certification for North American deployment. For GLP/GMP-regulated labs, optional audit-trail-enabled controllers (RKC RP950 series) support 21 CFR Part 11-compliant data integrity when paired with validated software.

Software & Data Management

The base configuration features a local digital interface with LED temperature readout, manual setpoint adjustment, and status LEDs for pump, compressor, and alarm states. For networked environments, the optional RKC RP950 controller provides RS-485 Modbus RTU communication, enabling integration into LabVantage, STARLIMS, or custom SCADA platforms. Logged parameters include real-time outlet temperature, cumulative runtime, compressor cycle count, and alarm history (with timestamps). Data export is supported via USB memory stick (CSV format), and configurable event triggers allow automated notifications via dry-contact relay outputs—suitable for linkage with building management systems (BMS) or emergency shutdown protocols. All firmware updates are performed offline via SD card to preserve validation integrity in regulated settings.

Applications

• Analytical Instrument Cooling: Stabilization of graphite furnace AAS, ICP torch interfaces, X-ray tube anodes, and SEM/TEM column chill plates to minimize thermal drift and improve signal-to-noise ratio
• Laser Systems: Thermal management of CO₂, fiber, and ultrafast lasers used in ablation, marking, welding, and micromachining—maintaining diode junction temperature within manufacturer-specified limits
• Materials Testing: Precise coolant delivery to hot-stage accessories in DSC, TGA, and rheometry systems where thermal inertia must be minimized
• Vacuum & Plasma Equipment: Heat rejection from diffusion pumps, turbo-molecular pump controllers, and RF matching networks in thin-film deposition and etching tools
• Industrial Process Support: Mold temperature control in lab-scale injection molding, die-casting simulation rigs, and additive manufacturing post-processing ovens

FAQ

What is the recommended maximum return water temperature for continuous operation?
For optimal compressor longevity and consistent refrigeration efficiency, the return water temperature should not exceed 40 °C. Sustained inlet temperatures above this threshold increase discharge pressure and reduce volumetric efficiency.
Can this chiller operate with glycol-water mixtures?
Yes—up to 30% ethylene or propylene glycol by volume is supported. However, glycol addition reduces effective heat capacity and flow rate; consult the derating curve in the technical manual before implementation.
Is remote monitoring possible without upgrading the controller?
No. The standard PID controller lacks communication interfaces. Remote status access and data logging require the optional RKC RP950 module with RS-485 output.
Does the unit comply with FDA 21 CFR Part 11 for electronic records?
Out-of-the-box, no—but the RKC RP950 option supports user authentication, electronic signatures, and immutable audit trails when deployed with validated software and procedural controls.
What maintenance intervals are recommended for laboratory-grade service life?
Perform quarterly visual inspection of condenser coils and reservoir cleanliness; replace the refrigerant dryer cartridge annually; verify calibration of the temperature sensor biannually using a NIST-traceable reference probe.