Tongzhou Weipu RG Series Split-Type Circulating Chiller

Overview

The Tongzhou Weipu RG Series Split-Type Circulating Chiller is an engineered thermal management solution designed specifically for high-precision, high-heat-load laboratory and industrial instrumentation. Unlike monoblock chillers, the RG Series adopts a physically separated architecture: the outdoor unit houses the refrigeration core—including hermetic scroll or semi-hermetic compressors, air-cooled condensers, and axial fans—while the indoor unit contains the circulation pump, stainless-steel reservoir, and evaporator heat exchanger. This separation eliminates internal heat recirculation and relocates primary acoustic sources (compressor vibration, fan noise) outdoors, achieving indoor ambient noise levels below 45 dBA at 1 m—critical for quiet-sensitive environments such as X-ray diffraction (XRD) labs, electron microscopy suites, and cleanroom-adjacent analytical zones. The system operates on vapor-compression refrigeration with R410A or R134a refrigerant (model-dependent), delivering stable coolant supply across a wide operational envelope (5–35 °C) with phase-change thermodynamic efficiency optimized for continuous duty cycles.

Key Features

• Split-system architecture with thermally and acoustically decoupled indoor/outdoor units—enabling zero heat discharge into conditioned lab spaces
• Outdoor unit built with industrial-grade galvanized steel chassis and corrosion-resistant aluminum finned condensers; no structural plastic components to ensure >15-year service life under continuous operation
• Intelligent climate adaptation: compressor crankcase heaters and variable-speed condenser fans support reliable start-up and capacity modulation across ambient temperatures from –25 °C (Northern China) to +45 °C (Southern coastal regions)
• Large-access 316L stainless-steel reservoir (custom volumes from 30 L to 500 L) with transparent level gauge, drain valve, and integrated UV-resistant sight glass for real-time water quality monitoring and simplified maintenance
• High-head magnetic-drive or multistage centrifugal circulation pumps (up to 6 bar max pressure, flow rates up to 120 L/min)—suitable for long-loop distribution networks and high-backpressure instruments (e.g., plasma etchers, vacuum coating systems)
• Comprehensive safety architecture: dual-pressure switch monitoring (HP/LP), motor overcurrent protection, phase-sequence/phase-loss detection, compressor discharge temperature cutoff, and automatic fault logging

Sample Compatibility & Compliance

The RG Series is engineered for seamless integration with high-value analytical and processing equipment requiring stable, low-noise, high-capacity cooling. It is routinely deployed with X-ray fluorescence (XRF) spectrometers, transmission electron microscopes (TEM), inductively coupled plasma mass spectrometers (ICP-MS), RF plasma sources, and industrial vacuum furnaces. All models comply with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity). Electrical design adheres to GB/T 19001–2016 (equivalent to ISO 9001) and incorporates dual-channel PT100 sensors with NIST-traceable calibration options. For regulated environments, optional audit-trail-enabled controllers meet FDA 21 CFR Part 11 requirements when paired with validated software packages.

Software & Data Management

Standard configuration includes an IP65-rated 7-inch TFT touchscreen HMI with real-time display of suction/discharge pressures, evaporator outlet temperature, reservoir level, pump status, and cumulative runtime. Optional Ethernet/Modbus TCP or RS485 interfaces enable integration into centralized building management systems (BMS) or LabVantage/STARLIMS platforms. Firmware supports configurable alarm thresholds, event-driven email/SMS notifications (via external gateway), and CSV export of 30-day trend logs (1-min resolution). For GxP environments, validation documentation packages—including IQ/OQ protocols, sensor calibration certificates, and FAT/SAT reports—are available upon request.

Applications

• Stabilized cooling for XRD and XRF source tubes and detector assemblies—preventing thermal drift in Bragg angle measurements
• Thermal load management in focused ion beam (FIB) and scanning electron microscope (SEM) columns, where sub-µm beam stability depends on <±0.5 °C coolant consistency
• Cooling of RF generators and matching networks in plasma-enhanced chemical vapor deposition (PECVD) and reactive ion etching (RIE) tools
• Process-critical temperature control in vacuum metallization systems, including e-beam evaporators and magnetron sputtering chambers
• Support for high-power laser systems (e.g., excimer, fiber lasers) requiring consistent ΔT across multi-kilowatt optical heads

FAQ

What is the maximum allowable vertical lift between indoor and outdoor units?
For optimal oil return and refrigerant flow dynamics, vertical separation should not exceed 20 m. Horizontal piping distance is limited to 50 m for RG models ≤34 kW and 80 m for ≥44 kW units. Longer runs require custom oil management solutions.
Can the RG Series operate continuously at 5 °C setpoint in ambient temperatures above 40 °C?
Yes—models equipped with high-ambient condensers and variable-speed fans maintain full rated capacity at 45 °C ambient per AHRI 550/590 testing protocols.
Is remote monitoring and control supported out of the box?
Standard HMI supports local control only. Remote access requires optional Ethernet module + cloud-ready firmware (Tongzhou Weipu CloudLink v3.2), enabling secure HTTPS-based dashboard access and alarm push via TLS 1.2.
Are custom refrigerants available for specific environmental compliance requirements?
R410A (standard), R134a (low-GWP alternative), and R513A (GWP < 600) are factory-installable options. A2L refrigerants (e.g., R1234ze) require engineering review due to charge size and safety cabinet constraints.
Does the system support integration with building automation systems (BAS)?
Yes—Modbus RTU (RS485) and BACnet MS/TP are standard; BACnet/IP and MQTT are available as field-upgradable firmware options.