English Product Name

Overview

The Jihepu DW-GL290 Ultra-Low Temperature Freezer is an engineered solution for long-term cryogenic storage of biologics, clinical specimens, and temperature-sensitive materials in research laboratories, biobanks, pharmaceutical QC labs, and diagnostic facilities. Designed to maintain stable thermal conditions from –10 °C to –65 °C, it employs a direct-cooling refrigeration architecture with a proprietary dual-circuit refrigerant system developed in collaboration with the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. This system utilizes environmentally compliant, non-ozone-depleting refrigerants (R404A/R508B blend or equivalent), eliminating chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) in full compliance with the Montreal Protocol and EU F-Gas Regulation (EU No. 517/2014). The freezer’s structural integrity and thermal performance are validated under ISO 13485:2016 (Medical Devices Quality Management Systems) and conform to IEC 61010-1 safety standards for laboratory equipment. Its upright, side-opening dual-door configuration optimizes workflow ergonomics while minimizing cold air loss during access—critical for maintaining sample integrity across repeated door cycles.

Key Features

• Microprocessor-controlled digital temperature management with Pt100 platinum resistance sensor, offering ±0.5 °C temperature uniformity across the chamber volume and real-time display of setpoint, actual internal temperature, and system status.
• Dual-layer insulated door design with magnetic gasket seal and mechanical safety lock, preventing unauthorized access and accidental temperature excursions.
• Reinforced cabinet construction using corrosion-resistant phosphated and powder-coated structural steel; interior chamber fabricated entirely from 304 stainless steel for chemical resistance and cleanability.
• Advanced secondary foaming insulation technology—applied in two sequential stages—to eliminate voids and thermal bridging, achieving effective thermal resistance (R-value) exceeding 3.8 m²·K/W at –65 °C.
• Comprehensive alarm suite including high/low temperature deviation, door ajar, power failure, compressor overload, condenser overheating, sensor fault, and ambient temperature exceedance—with audible and visual alerts plus relay dry-contact outputs for building management system (BMS) integration.
• Operational safeguards: programmable start-up delay, compressor cycle protection, keypad lock with user-defined password, and battery-backed memory retention for parameter settings during brief outages.

Sample Compatibility & Compliance

The DW-GL290 supports storage of primary human biospecimens—including peripheral blood mononuclear cells (PBMCs), hematopoietic stem cells, semen, ovarian tissue, and skin grafts—as well as microbial cultures, viral vectors, and thermolabile reagents. Its temperature stability profile meets requirements outlined in ISO 20387:2018 (Biobanking—General Requirements for Biobank Operations) and aligns with best practices recommended by the International Society for Biological and Environmental Repositories (ISBER). All electrical and mechanical components comply with CE marking directives (2014/35/EU Low Voltage Directive and 2014/30/EU EMC Directive). Regulatory documentation includes a Class II Medical Device Registration Certificate issued by China NMPA, ISO 9001:2015, ISO 14001:2015, ISO 13485:2016, and OHSAS 18001:2007 certifications.

Software & Data Management

While the DW-GL290 operates via embedded firmware without cloud connectivity, its control interface supports audit-trail-capable logging of critical events—including temperature deviations, door openings, alarm triggers, and parameter modifications—stored locally for ≥30 days. Optional RS485/Modbus RTU output enables integration with centralized laboratory information management systems (LIMS) or environmental monitoring platforms. Data export is supported via USB port (not included), allowing retrieval of timestamped CSV logs compatible with GLP/GMP-compliant review workflows. Firmware updates are performed offline using certified service tools to ensure data integrity and regulatory traceability per FDA 21 CFR Part 11 Annex A guidelines on electronic records.

Applications

• Cryopreservation of clinical-grade cell therapies and regenerative medicine products under GTP-compliant conditions.
• Long-term archival storage of genomic DNA, RNA, and tissue sections at temperatures that suppress enzymatic degradation and nucleic acid fragmentation.
• Stabilization of monoclonal antibodies, recombinant proteins, and enzyme preparations prior to analytical characterization (e.g., SEC-HPLC, DSC).
• Storage of reference standards and calibration materials used in ISO/IEC 17025-accredited testing laboratories.
• Environmental stress testing of electronic components requiring controlled low-temperature exposure per MIL-STD-810G Method 502.6.

FAQ

What is the minimum ambient operating temperature for the DW-GL290?

The unit is rated for installation in rooms maintained between +10 °C and +32 °C (Climate Class N), with relative humidity ≤70% non-condensing. Operation outside this range may impair compressor efficiency and temperature recovery time.

Does the freezer support remote monitoring via Ethernet or Wi-Fi?

No. Remote monitoring requires external hardware integration via its RS485 Modbus interface; no built-in IP networking capability is provided.

Is validation documentation (IQ/OQ/PQ protocols) available?

Yes—validated test templates and commissioning checklists are supplied with the unit. Custom IQ/OQ execution services are available through authorized Jihepu technical partners.

How often does manual defrosting need to be performed?

The DW-GL290 uses a continuous direct-cooling system with no automatic defrost cycle; periodic manual defrost is required only if frost accumulation exceeds 5 mm on evaporator surfaces—typically every 6–12 months depending on usage frequency and ambient humidity.

Can the internal shelving be reconfigured for non-standard containers?

Yes. The adjustable stainless-steel shelves are height-adjustable in 25 mm increments and support load capacities up to 25 kg per shelf, accommodating standard cryoboxes, canisters, and custom racks.