Tianfeng TF-LS-300W Integrated Circulating Chiller

Overview

The Tianfeng TF-LS-300W Integrated Circulating Chiller is an engineered solution for precise temperature control in laboratory-scale applications requiring stable, continuous coolant circulation. Designed around a hermetic scroll compressor and optimized refrigeration cycle using R22 refrigerant, this chiller operates on the vapor-compression principle to deliver consistent cooling capacity of 0.3 kW at standard ambient conditions. Its compact integrated architecture eliminates external piping complexity and reduces footprint—ideal for benchtop placement in analytical laboratories, material testing setups, or as a dedicated cooling source for spectrometers, laser systems, and vacuum pumps. The unit maintains thermal stability through proportional control logic coupled with a thermostatic expansion valve, ensuring responsive load adaptation without overshoot or oscillation. Unlike modular chillers requiring separate reservoirs or controllers, the TF-LS-300W integrates pump, reservoir, heat exchanger, and control logic into a single, self-contained enclosure—reducing installation time and minimizing maintenance points.

Key Features

• Hermetic scroll compressor (0.13 kW) delivering high volumetric efficiency, low vibration, and extended service life under cyclic laboratory duty.
• High-efficiency condenser assembly featuring copper tubing with aluminum finned heat exchange surface and a low-noise external rotor fan (500 m³/h airflow), enabling effective heat rejection in confined lab spaces.
• Immersed coil evaporator design ensures uniform heat transfer between refrigerant and circulating fluid, minimizing localized freezing risk and improving thermal response time.
• Integrated centrifugal circulation pump (0.37 kW, 1 m³/h flow, 4 m head) with stainless steel wetted parts compatible with deionized water and common aqueous coolant mixtures.
• 5-liter insulated reservoir with level sensor and overflow protection, supporting stable flow dynamics during transient thermal loads.
• Comprehensive safety architecture including compressor overheat, high/low pressure cutoffs, phase sequence monitoring, overcurrent detection, and overtemperature shutdown—fully compliant with IEC 61000-6-2/6-4 EMC and IEC 60335-1 safety standards.

Sample Compatibility & Compliance

The TF-LS-300W is designed for use with non-corrosive, non-viscous heat transfer fluids—including deionized water, 30% ethylene glycol/water mixtures, and other ISO 6743-22 Class HEA-compatible coolants. It is not rated for flammable, abrasive, or highly conductive media. All wetted components—including pump housing, reservoir, and internal tubing—are constructed from corrosion-resistant materials suitable for GLP-compliant environments. The unit conforms to ISO 9001:2015 quality management requirements and meets CE marking criteria for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). While not FDA 21 CFR Part 11–certified out-of-the-box, its analog control interface supports integration into validated systems where audit trails and user access controls are implemented externally.

Software & Data Management

The TF-LS-300W employs a microprocessor-based digital controller with LED display, offering real-time monitoring of outlet temperature, compressor status, and fault codes. Though it does not feature embedded Ethernet or USB connectivity, its analog output (0–10 V or 4–20 mA) enables integration with centralized building management systems (BMS) or SCADA platforms for remote alarm logging and trend analysis. Temperature setpoint resolution is ±0.1 °C, with steady-state stability maintained within ±0.3 °C under constant load. For laboratories operating under GLP or GMP frameworks, the controller supports manual calibration verification logs, and all safety interlocks generate non-erasable event timestamps stored in volatile memory—facilitating root-cause analysis during system audits.

Applications

• Cooling of UV-Vis spectrophotometers, FTIR instruments, and X-ray diffractometers to prevent thermal drift in optical path alignment.
• Temperature stabilization of HPLC column ovens and detector cells, particularly during gradient elution protocols sensitive to ambient fluctuations.
• Heat removal from Nd:YAG and diode-pumped solid-state lasers used in Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS).
• Support of vacuum pump operation by maintaining oil temperature below 60 °C to preserve viscosity and sealing integrity.
• Controlled cooling of reaction calorimeters and jacketed glass reactors in synthetic chemistry labs.
• Supplemental cooling for electrophoresis power supplies and gel documentation systems requiring low-noise thermal environments.

FAQ

What is the maximum allowable coolant temperature range for continuous operation?
The unit is rated for outlet temperatures between 5 °C and 35 °C. Operation below 5 °C requires antifreeze mixture and is limited to short-term use; prolonged sub-zero operation without glycol may cause ice formation in the evaporator coil.
Can the TF-LS-300W be used with a closed-loop recirculation system connected to external equipment?
Yes—it is specifically designed for closed-loop configurations. The integrated pump provides sufficient head (4 m) to overcome typical pressure drops across 10–15 m of 1/2″ ID tubing and standard heat exchangers.
Is R22 refrigerant still supported under current environmental regulations?
R22 is subject to phase-out per Montreal Protocol Annex A, Group I. While existing units may operate under servicing allowances, new installations should consider R407C or R410A alternatives; Tianfeng offers retrofit consultation upon request.
Does the chiller include a built-in filtration system?
No—external particulate filtration (e.g., 5–10 µm inline filter) is recommended when using tap water or reclaimed coolant to prevent pump impeller erosion and valve clogging.
What maintenance intervals are recommended for optimal performance?
Compressor oil inspection every 24 months; condenser coil cleaning every 6 months in dusty environments; reservoir descaling annually if using hard water; and full system leak check and refrigerant charge verification every 36 months.