Tongzhou Weipu AC Series Circulating Chiller

Overview

The Tongzhou Weipu AC Series Circulating Chiller is an engineered thermal management solution designed specifically for precision laboratory instrumentation requiring stable, continuous coolant delivery. Operating on vapor-compression refrigeration with air-cooled condensation, the system maintains precise temperature control (5–35 °C) with high stability (±0.1 °C) across extended operational cycles. Its integrated architecture—combining refrigeration circuit, stainless-steel reservoir, variable-flow circulation pump, and intelligent monitoring logic—ensures consistent heat extraction from sensitive analytical instruments such as atomic absorption spectrometers (AAS), inductively coupled plasma optical emission spectrometers (ICP-OES), scanning electron microscopes (SEM), and plasma etching systems. Unlike generic chillers, the AC Series incorporates application-specific design elements—including corrosion-resistant wetted materials, flow-sensing interlocks, and multi-stage thermal protection—to meet the reliability and contamination control requirements of regulated laboratory environments.

Key Features

• Stainless-steel open-top reservoir with transparent side panels for real-time visual inspection of coolant clarity and particulate accumulation
• Integrated pre-filter assembly with replaceable cartridge; filter status observable without disassembly
• Standard water-level sensor and optional flow switch sensor for fail-safe detection of low-flow or dry-run conditions
• Full stainless-steel fluid path—including pump housing, tubing, and fittings—to prevent leaching, scaling, or microbial proliferation
• Optional ion-exchange resin filtration module for deionized water recirculation, supporting long-term purity maintenance in ultra-low-conductivity applications
• Rear-mounted axial fans with optimized airflow ducting ensure efficient heat dissipation while minimizing cabinet surface temperature rise and acoustic emissions (<58 dB(A) at 1 m)
• Digital PID temperature controller with programmable ramp-soak profiles and external trigger interface (dry-contact I/O) for synchronized start/stop with host instrumentation

Sample Compatibility & Compliance

The AC Series is compatible with aqueous coolants, 20–50% ethylene glycol/water mixtures, and deionized water when equipped with resin filtration. It meets mechanical safety requirements per IEC 61010-1 (2010) for laboratory electrical equipment and complies with electromagnetic compatibility standards EN 61326-1. While not certified to UL or CSA for North American markets, its control architecture supports integration into GLP/GMP workflows through configurable alarm logging and event timestamping. Optional analog voltage outputs (0–10 V) and RS-485 Modbus RTU communication enable connection to centralized building management systems (BMS) or LIMS platforms for audit-ready thermal history tracking. All models include hardware-based overtemperature cutoff (≥40 °C) and low-water-level shutdown to prevent compressor damage during unattended operation.

Software & Data Management

The chiller operates via a front-panel LCD interface with intuitive menu navigation and real-time display of setpoint, actual temperature, flow rate, and system status codes. No proprietary software is required for basic operation; however, optional Modbus-enabled controllers support remote parameter adjustment and data polling at 1-second intervals. Logged events—including flow interruption, temperature deviation >±0.5 °C, and compressor cycle count—are stored in non-volatile memory for up to 30 days. For laboratories subject to FDA 21 CFR Part 11, third-party SCADA integration (e.g., Ignition, LabVIEW) enables electronic signature enforcement, audit trail generation, and role-based access control when paired with validated drivers.

Applications

• Thermal stabilization of graphite furnace AAS atomizers and ICP torch interfaces
• Cooling of SEM electron column components and detector housings to minimize thermal drift
• Heat rejection from RF generators in plasma etch and deposition tools
• Temperature regulation of Kjeldahl digestion blocks and high-frequency fusion furnaces
• Secondary cooling loop for glovebox inert gas purification systems
• Support of high-resolution X-ray fluorescence (XRF) spectrometers requiring <0.05 °C thermal gradient control

FAQ

What is the nominal refrigeration capacity rating based on?
The stated capacity (e.g., 1000 W for AC1000) is measured under standard test conditions: ambient temperature 25 °C, inlet coolant temperature 25 °C, and full-load operation. Actual capacity decreases linearly with rising ambient temperature or lower setpoint temperatures; derating curves are provided in the technical manual.
Can this chiller operate with deionized water without corrosion risk?
Yes—when configured with the optional resin filtration module and full stainless-steel fluid path, the system maintains resistivity >1 MΩ·cm for >72 hours without measurable metal ion leaching (tested per ASTM D1125).
Is remote monitoring supported out of the box?
Basic dry-contact alarm outputs and start/stop signals are standard. RS-485 Modbus RTU communication and analog process outputs require optional controller firmware and hardware configuration.
How often should the pre-filter cartridge be replaced?
Under typical lab use with tap water pretreatment, replacement is recommended every 3–6 months; frequency increases with higher suspended solids load or use of non-deionized coolants.
Does the unit comply with ISO/IEC 17025 calibration traceability requirements?
While the chiller itself is not a measuring instrument, its embedded Pt100 sensor is factory-calibrated against NIST-traceable references, and calibration certificates (including uncertainty budgets) are available upon request for metrological validation.