Tianfeng TF-LS-2.33HP Air-Cooled Industrial Circulating Chiller

Overview

The Tianfeng TF-LS-2.33HP is an integrated, air-cooled industrial circulating chiller engineered for precise thermal management in demanding laboratory and light-industrial environments. It operates on the vapor-compression refrigeration cycle, utilizing a hermetic scroll compressor and R22 refrigerant to deliver stable, continuous cooling across a wide operational range (0–50 °C). Unlike water-cooled chillers requiring external cooling towers or facility water loops, this unit relies solely on forced-air convection via a high-efficiency condenser assembly—comprising mechanically expanded copper tubes with aluminum fins and a low-noise external rotor fan delivering 2500 m³/h airflow. Its closed-loop design circulates deionized or treated process water through an internal stainless steel tank coil evaporator, ensuring consistent heat exchange without contamination risk. The system is designed for uninterrupted 24/7 operation, supporting critical instrumentation where thermal drift directly impacts measurement integrity—such as in atomic absorption spectrometry, X-ray diffraction, electron microscopy, and plasma-based analytical platforms.

Key Features

• Hermetic scroll compressor (2.15 kW) sourced from Japan or the U.S., delivering high volumetric efficiency, low mechanical wear, and acoustic noise <65 dB(A) at 1 m distance.
• Stainless steel reservoir (45 L capacity) with integrated auto-refill function, corrosion-resistant construction compliant with ASTM A240 Type 304 standards.
• Precision digital temperature controller (imported from Japan) with PID algorithm, enabling setpoint resolution of 0.1 °C and sustained stability within ±0.1 °C under dynamic load conditions.
• High-reliability circulation pump (0.37 kW, 2 m³/h flow, 14 m head) featuring dual sourcing—either Italian-made or domestic “Southern” brand—certified to ISO 5199 for sealless, leak-free operation.
• Electrostatic powder-coated enclosure with modular front/rear panels for rapid access to compressors, electrical cabinets, and refrigerant manifolds—designed for GLP-compliant maintenance logging.
• Comprehensive safety architecture including high/low pressure switches, compressor winding overtemperature sensors, phase-loss detection, and real-time fault code display with relay output for PLC integration.

Sample Compatibility & Compliance

This chiller is compatible with a broad spectrum of heat-generating analytical instruments requiring regulated coolant delivery—including graphite furnace atomic absorption spectrometers (GFAAS), inductively coupled plasma optical emission spectrometers (ICP-OES), scanning/transmission electron microscopes (SEM/TEM), X-ray fluorescence (XRF) and X-ray diffraction (XRD) systems, and laser-based material processing tools. Its stainless steel wetted parts meet FDA 21 CFR Part 11 requirements for traceability when paired with optional audit-trail-enabled controllers. While not certified to UL 61010-1 or IEC 61000-6-4 out-of-the-box, the unit conforms to CE marking prerequisites for EMC immunity and low-voltage directive compliance when installed per manufacturer-specified clearances and grounding protocols. All refrigerant handling adheres to ISO 8573-1 Class 4 purity standards for compressed air circuits used in associated instrumentation.

Software & Data Management

The TF-LS-2.33HP supports analog (4–20 mA) and digital (RS485 Modbus RTU) interfaces for integration into centralized lab infrastructure monitoring systems. Optional firmware upgrades enable time-stamped temperature logging at user-defined intervals (1 s–30 min), exportable via USB to CSV-compatible formats for traceable record retention. When deployed in GMP-regulated facilities, the chiller’s embedded event log captures timestamps for all alarm triggers, manual setpoint changes, and power-cycle events—meeting ALCOA+ data integrity principles for long-term archival. No proprietary cloud platform is required; data export remains fully offline and vendor-agnostic.

Applications

• Laser systems: Stabilizing diode-pumped solid-state (DPSS) and CO₂ lasers during precision machining or spectroscopic excitation.
• Plasma instrumentation: Maintaining RF generator and torch coolant temperatures within ±0.2 °C to ensure plasma impedance consistency in ICP-MS.
• Electron microscopy: Preventing thermal lensing in TEM column optics and mitigating specimen drift in cryo-EM stages.
• X-ray sources: Regulating rotating anode bearing temperatures to extend service life and minimize spectral line broadening.
• Process validation: Supporting IQ/OQ protocols for HVAC-coupled cleanroom equipment requiring documented thermal stability verification.

FAQ

Is R22 refrigerant still permissible for new installations in the EU or North America?
R22 is phased out under the Montreal Protocol and prohibited for new equipment in the EU (F-Gas Regulation No. 517/2014) and the U.S. (EPA SNAP Rule). This model is intended for legacy replacement or regions where R22 remains authorized; retrofitting to R404A or R407C requires compressor and lubricant compatibility verification.
Can the chiller operate continuously at 50 °C ambient temperature?
Yes—the condenser fan and fin-tube design are rated for continuous duty up to 45 °C ambient. At 50 °C, refrigeration capacity declines by approximately 12% relative to nominal rating; derating curves are provided in the technical manual.
Does the unit support remote start/stop and temperature setpoint adjustment via Modbus?
Yes—RS485 Modbus RTU interface supports full read/write access to setpoints, status registers, and alarm history. Register map documentation is included with firmware version 2.1+.
What is the minimum allowable coolant conductivity for safe operation with sensitive instruments?
For compatibility with GFAAS and ICP systems, maintain coolant resistivity ≥1 MΩ·cm (conductivity ≤1 µS/cm); use deionized water with biocide-grade inhibitor to prevent biofilm formation in the 45 L reservoir.
Is the stainless steel reservoir electropolished to pharmaceutical-grade finish?
No—the tank meets ASTM A240 304 but is mechanically polished only; electropolishing (Ra ≤0.4 µm) is available as a factory option (specify code EP-304 at order entry).