Hanuo FMB40 Laboratory-Grade Flake Ice Machine

Overview

The Hanuo FMB40 Laboratory-Grade Flake Ice Machine is an engineered solution for controlled, on-demand production of irregular, fine-textured flake ice—optimized for thermal management in sensitive laboratory workflows. Unlike cubed or nugget ice systems, the FMB40 employs a twin-screw extrusion principle: water is frozen into a thin film on a refrigerated evaporator drum, then mechanically scraped and compressed through dual counter-rotating stainless-steel screws. This process yields dry, low-density flakes (typically 1–3 mm in thickness, with variable lateral dimensions under 5 mm), exhibiting high surface-area-to-volume ratio and rapid thermal transfer kinetics. The machine is specifically calibrated for environments where consistent cooling performance, minimal water waste, and spatial efficiency are critical—such as histology specimen preparation, PCR reagent chilling, electrophoresis buffer temperature stabilization, and cold-chain sample handling prior to analysis.

Key Features

• Stainless steel 304 enclosure and internal components ensure corrosion resistance, cleanability, and compliance with ISO 14644-1 Class 8 (ISO Class 100,000) ambient lab compatibility.
• Compact monoblock architecture (380 × 543 × 722 mm) minimizes footprint—ideal for benchtop integration or under-counter installation in QC labs and research facilities.
• Air-cooled condensing system eliminates need for external water drainage or chiller hookups; suitable for laboratories without dedicated chilled-water infrastructure.
• Twin-screw extrusion evaporator with cavity-divider design enhances heat exchange uniformity and reduces localized freezing inefficiencies.
• Microprocessor-based control unit provides real-time monitoring of evaporator temperature, compressor duty cycle, ice bin level, and water reservoir status—with non-volatile memory for operational history logging.
• Zero-residual water design: integrated sump drainage and self-flushing cycle ensure no standing water remains post-harvest, mitigating microbial growth risk per CLSI GP35-A4 guidelines.
• Acoustic optimization via two-stage gear reduction delivers sustained operation at ≤58 dB(A) at 1 m—compatible with noise-sensitive analytical lab zones.

Sample Compatibility & Compliance

The FMB40 produces flake ice certified for indirect contact with biological and chemical samples per FDA 21 CFR §174.50 and NSF/ANSI Standard 12 for food equipment—validated for use in clinical diagnostics, pharmaceutical stability testing, and academic life science research. Its ice morphology enables conformal packing around vials, tissue blocks, and microcentrifuge tubes without mechanical stress. While not classified as medical device (Class I or II), the unit conforms to electromagnetic compatibility (EMC) standards IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emissions), and meets RoHS Directive 2011/65/EU material restrictions. It supports GLP-aligned documentation through optional RS-232 serial output for time-stamped ice production logs.

Software & Data Management

The embedded controller does not require external software but supports ASCII protocol over RS-232 for integration into centralized lab monitoring systems (e.g., LabVantage, Thermo Fisher SampleManager). Event logs—including start/stop timestamps, fault codes (E01–E09), and daily ice mass estimates—are retained for ≥30 days. No cloud connectivity or proprietary drivers are required; data export is plain-text compatible with CSV parsers. Audit trail functionality satisfies basic 21 CFR Part 11 read-only record retention requirements when paired with validated third-party log archiving.

Applications

• Cooling of enzymatic reaction mixtures during DNA extraction and restriction digestion
• Temperature maintenance of HPLC autosampler trays and LC-MS source compartments
• Pre-chilling of centrifuge rotors and cryogenic sample carriers
• Embedding medium cooling in paraffin sectioning workflows
• Short-term preservation of primary cell suspensions during flow cytometry setup
• Buffer temperature equilibration in protein crystallization trials
• Field-deployable cold storage supplementation for mobile biosafety labs

FAQ

What is the typical flake density and melting profile under standard lab conditions (22°C, 45% RH)?
Flake density ranges from 350–420 kg/m³; complete melt time for a 100 g pack in ambient air is approximately 22–28 minutes—significantly faster than cube ice due to interstitial air content and high surface exposure.
Can the FMB40 operate continuously in a 30°C ambient environment?
Yes—air-cooled performance is rated for continuous operation up to 32°C ambient, though ice yield decreases by ~12% at 30°C versus 25°C reference conditions.
Is routine descaling required? If so, what agent is recommended?
Descaling every 3–6 months is advised depending on feed water hardness; only citric acid-based solutions (≤5% w/w, pH 2.5–3.0) are approved—hydrochloric or phosphoric acid will damage evaporator plating.
Does the unit include a water filtration module?
No—external 5 µm sediment + activated carbon pre-filtration is mandatory to prevent nozzle clogging and scale formation on the evaporator surface.
What electrical supply specifications must be observed?
220–240 V AC, 50 Hz, single-phase, with dedicated 16 A circuit breaker and grounded outlet; voltage fluctuation tolerance is ±10% RMS.