Chuanyu CHDL-1030 Low-Temperature Circulating Chiller with Integrated Bath Tank

Overview

The Chuanyu CHDL-1030 Low-Temperature Circulating Chiller with Integrated Bath Tank is an engineered thermal management system designed for precise temperature control in laboratory-scale chemical synthesis, reaction monitoring, and instrumentation cooling applications. It operates on a closed-loop vapor-compression refrigeration cycle using a hermetically sealed, air-cooled scroll compressor—optimized for low-noise, high-reliability operation under continuous duty. Unlike standalone chillers or passive baths, the CHDL-1030 integrates a 30-liter stainless-steel bath reservoir with dual-mode (refrigeration + heating) temperature regulation and bidirectional fluid circulation. This architecture enables both direct immersion experiments—such as low-temperature crystallization or enzyme kinetics studies—and indirect thermal coupling via external loops to rotary evaporators, double-jacketed glass reactors, freeze dryers, UV-Vis spectrophotometers, and magnetic stirrers. Its microprocessor-based PID controller maintains setpoint stability within ±0.5 °C across the full operating range (−10 °C to +100 °C), supporting reproducible thermodynamic conditions required in QC/QA labs, pharmaceutical R&D, and academic physical chemistry workflows.

Key Features

• Integrated 30 L stainless-steel bath tank with corrosion-resistant interior and transparent level indicator
• Dual-mode temperature control: active refrigeration down to −10 °C and electric heating up to +100 °C
• High-capacity centrifugal circulation pump delivering up to 15 L/min flow rate with adjustable pressure output
• Intelligent microcontroller with digital LED display (SV/PV), programmable timer, and auto-shutdown on overtemperature or low-fluid detection
• Air-cooled, oil-free scroll compressor with thermal overload protection and low-vibration mounting
• External loop ports (G1/4″ BSP) compatible with standard silicone or fluoropolymer tubing (ID 6–10 mm)
• Front-panel accessible drain valve and fill port for rapid coolant exchange and maintenance
• Compliance-ready design: meets electromagnetic compatibility (EMC) standards EN 61000-6-3/6-4 and harmonic current limits per EN 61000-3-2/3-3

Sample Compatibility & Compliance

The CHDL-1030 accommodates a broad range of heat-transfer fluids—including 95% ethanol, methanol/water mixtures, ethylene glycol solutions, and specialized low-temperature silicones—enabling operation across diverse chemical environments without material degradation. Its bath geometry supports direct placement of vessels up to Ø250 mm × H300 mm, while the external circulation interface permits seamless integration into GLP-compliant analytical workflows. Though not certified for GMP manufacturing environments, its stable thermal output, audit-trail-capable timer function, and repeatable setpoint accuracy align with common requirements for method validation per USP <1058>, ISO/IEC 17025:2017 Clause 5.4.2, and ASTM E2925-13 (Standard Practice for Thermal Stability Testing). The unit does not incorporate FDA 21 CFR Part 11 electronic signature functionality; however, its analog/digital I/O signals can be interfaced with validated SCADA or LIMS systems via optional RS485 Modbus RTU module.

Software & Data Management

The CHDL-1030 operates via embedded firmware without proprietary PC software. All operational parameters—including setpoint, real-time bath temperature (PV), timer status, pump speed, and fault codes—are displayed on a dual-line LED interface. For laboratories requiring data logging, the unit provides a 0–5 V analog output proportional to bath temperature (±0.1 V full scale), compatible with third-party DAQ systems such as National Instruments USB-6009 or Keysight 34972A. Optional RS485 communication (Modbus RTU protocol) enables remote setpoint adjustment, status polling, and alarm event reporting—supporting centralized monitoring in multi-instrument setups. No internal memory or cloud connectivity is implemented; all configuration is retained in non-volatile EEPROM and survives power interruption.

Applications

• Temperature-controlled synthesis in double-walled glass reactors and jacketed PTFE-lined vessels
• Cooling condenser coils on rotary evaporators during solvent removal below ambient dew point
• Stabilizing optical path temperatures in UV-Vis and FTIR spectrometers to minimize baseline drift
• Maintaining consistent thermal environment for calorimetric assays and DSC reference cells
• Providing sub-zero coolant supply to cryogenic sample holders in XRD and NMR auxiliary systems
• Regulating bath temperature during accelerated stability testing of pharmaceutical formulations (ICH Q1A)
• Supporting low-temperature enzymatic reactions in biocatalysis and fermentation optimization studies

FAQ

What coolant fluids are recommended for use with the CHDL-1030?
Ethanol (≥95%), methanol/water (30/70 v/v), or inhibited propylene glycol solutions are preferred. Avoid tap water due to scaling and corrosion risk.
Can the unit operate continuously at −10 °C?
Yes—provided ambient temperature remains ≤30 °C and ventilation clearance (≥400 mm rear/side) is maintained per IEC 60068-2-14.
Is external circulation mandatory, or can it be used as a static bath only?
Both modes are supported: internal recirculation maintains bath homogeneity; external loop enables remote heat exchange.
Does the CHDL-1030 support remote start/stop via digital signal?
Not natively—but optional RS485 Modbus integration allows external PLC or computer control of all major functions.
What maintenance intervals are recommended?
Compressor oil inspection every 12 months; coolant replacement every 6–12 months depending on fluid type and usage intensity.