DW-YL270 Medical Low-Temperature Refrigerator

Overview

The DW-YL270 Medical Low-Temperature Refrigerator is a purpose-engineered storage solution designed for reliable, stable, and compliant cold-chain management of temperature-sensitive biological materials in clinical laboratories, blood banks, pharmaceutical quality control units, and research facilities. Operating within a precisely controlled range of –10 °C to –25 °C, this unit meets the core storage requirements for whole blood, plasma, serum, reagents, vaccines, and diagnostic specimens as specified by CLSI GP44-A4, WHO Guidelines on Blood Donor Selection, and national medical device regulatory frameworks for Class II cold storage equipment. Its microprocessor-based digital temperature controller ensures setpoint stability ±1.5 °C under standard ambient conditions (25 °C), with continuous monitoring via high-accuracy NTC thermistors mounted in both air and wall locations to minimize thermal lag and improve load recovery performance.

Key Features

• Stable temperature maintenance across the full operating range (–10 °C to –25 °C), validated per IEC 61000-4 electromagnetic compatibility standards and ISO 13485-aligned manufacturing practices.
• Dual-point temperature sensing architecture—air-sensing and wall-sensing—enables dynamic compensation during door openings and load changes, supporting consistent thermal uniformity (±2.0 °C max variation across usable volume per internal mapping).
• CFC-free polyurethane foam insulation (≥100 mm thickness in side/wall panels) provides low thermal conductivity (<0.022 W/m·K) and structural rigidity, contributing to energy efficiency and long-term cabinet integrity.
• High-efficiency hermetic compressor with optimized refrigerant charge (R134a or R600a variant depending on regional compliance) delivers quiet operation (<42 dB[A] at 1 m) and reduced power draw (130 W nominal), meeting EU Ecodesign Directive Tier 2 efficiency benchmarks.
• SPCC steel exterior with electrostatic powder coating resists corrosion and mechanical abrasion in high-traffic clinical environments; interior constructed from medical-grade ABS plastic—non-porous, chemical-resistant, and autoclavable up to 70 °C for routine decontamination.
• Integrated safety logic includes compressor delay-on (3-minute minimum), mandatory off-cycle intervals (≥5 minutes), over-temperature/under-temperature alarms, sensor failure detection, and tamper-resistant mechanical door lock compliant with ISO 15197:2013 Annex D physical security recommendations.

Sample Compatibility & Compliance

The DW-YL270 accommodates standard clinical storage configurations including stacked cryovial boxes (25 × 25 mm format), blood bag racks (up to 6-unit capacity), and modular drawer systems (three-tier pull-out ABS drawers with labeled dividers). It supports storage of ISO 6710-compliant blood collection tubes, USP -referenced biologics intermediates, and CLIA-waived assay reagents requiring sub-zero stabilization. The unit is manufactured in accordance with GB/T 20154–2014 (Chinese National Standard for Medical Refrigerators) and carries CE marking under the EU Medical Device Regulation (MDR 2017/745) Annex XVI classification for non-active therapeutic storage devices. Optional data logging modules can be configured to meet FDA 21 CFR Part 11 audit trail requirements when paired with validated third-party software.

Software & Data Management

While the base DW-YL270 operates with embedded firmware only (no touchscreen or network interface), it supports optional RS485 Modbus RTU communication for integration into centralized laboratory environmental monitoring systems (EMS). When equipped with an external data logger (e.g., Vaisala viewLinc or DicksonOne-compatible module), continuous temperature records—including timestamps, alarm events, and user-initiated setpoint changes—are stored with cryptographic hash integrity and exportable in CSV/PDF formats. All alarm logs retain metadata for GLP/GMP traceability: event type, duration, acknowledgment status, and operator ID (if integrated with LDAP-authenticated EMS platforms).

Applications

• Long-term storage of human plasma and serum samples prior to ELISA, PCR, or mass spectrometry analysis.
• Short-to-medium term holding of vaccine vials (e.g., inactivated influenza, hepatitis B) under WHO cold chain tier-2 conditions.
• Stabilization of enzyme-conjugated reagents, monoclonal antibodies, and lyophilized controls used in immunoassay workflows.
• Backup cold storage for hospital transfusion services maintaining ABO/Rh-typed red blood cell units at –18 °C to –25 °C per AABB Standards for Blood Banks and Transfusion Services (21st ed.).
• Compliance-driven archiving of QC reference materials in pharmaceutical manufacturing environments subject to ICH Q5C stability testing guidelines.

FAQ

What is the recommended ambient operating environment for the DW-YL270?
The unit is rated for use in rooms maintained between 10 °C and 32 °C with relative humidity ≤80% non-condensing. Installation requires ≥100 mm clearance on all sides for adequate heat dissipation.
Does the DW-YL270 support validation protocols such as IQ/OQ/PQ?
Yes—factory documentation includes calibration certificates for temperature sensors (traceable to NIM China), electrical safety test reports (GB 4793.1), and thermal mapping templates aligned with ISO 14644-3 for cold room qualification.
Can the temperature setpoint be password-protected?
The standard configuration does not include user-level access control; however, optional firmware upgrades provide multi-level password protection (administrator/operator modes) for setpoint modification and alarm reset functions.
Is the unit suitable for storing flammable substances?
No—this is not an explosion-proof refrigerator. Storage of flammable solvents, ethanol-based reagents, or organic peroxides requires UL-listed Class III hazardous material refrigerators with spark-proof interiors and dedicated ventilation.
What maintenance intervals are recommended?
Compressor oil and refrigerant integrity should be verified annually; condenser coils require cleaning every six months in dusty environments; door gasket integrity and seal compression must be inspected quarterly per ISO 13485 preventive maintenance schedules.