ZiQi IMS-70 Flake Ice Machine

Overview

The ZiQi IMS-70 Flake Ice Machine is an engineered solution for laboratories requiring consistent, high-surface-area ice in precise, contamination-controlled volumes. Unlike cubed or tube ice systems, the IMS-70 employs a twin-screw extrusion principle—where chilled water is rapidly frozen within a vertically oriented, chamber-partitioned evaporator and mechanically sheared by precision-ground stainless steel augers. This process yields irregular, low-density flake ice particles (typically 1–3 mm in longest dimension, with high void fraction), optimized for rapid thermal transfer and conformal contact with sample vessels, centrifuge rotors, electrophoresis tanks, and enzymatic reaction blocks. Its design prioritizes operational continuity in temperature-sensitive workflows: the unit maintains stable ice output across ambient lab temperatures up to 32°C, with integrated thermal management—including top-mounted axial fans and enhanced condenser airflow—to sustain compressor efficiency under sustained duty cycles.

Key Features

• Full 304 stainless steel enclosure and interior components, certified for corrosion resistance in humid, saline, or reagent-exposed lab environments;
• CFC-free polyurethane foam insulation (λ ≤ 0.022 W/m·K) with antimicrobial inner liner compliant with ISO 22196:2011 for bacterial growth inhibition;
• Hermetically sealed, high-efficiency rotary compressor (imported, R134a refrigerant) coupled with low-noise gearmotor assembly (<52 dB(A) at 1 m);
• Microprocessor-based control system featuring real-time digital display of operational status—including ice-full detection, low-water alarm, fault code logging (e.g., E01 = evaporator thermistor failure, E03 = condenser overtemp), and auto-restart after power recovery;
• Float-valve feed system eliminating residual water retention, preventing biofilm formation and ensuring zero manual defrost cycles;
• Self-separating ice/water architecture: melted condensate is recirculated; excess water is drained automatically—no user intervention required;
• Front-panel tactile switch and LED status indicators aligned with IEC 60601-1 accessibility guidelines for glove-compatible operation;
• Integrated thermal cutouts and ground-fault circuit interrupter (GFCI) protection meeting UL 61010-1 and EN 61010-1 safety standards.

Sample Compatibility & Compliance

The IMS-70 produces flake ice suitable for direct contact with biological, chemical, and pharmaceutical samples—its non-crystalline morphology minimizes mechanical shear on fragile cells or precipitates during ice-bath preparation. Ice particle size distribution (verified via sieve analysis per ASTM E11-22) falls predominantly within the 0.5–2.5 mm range, enabling uniform packing around microcentrifuge tubes, PCR strips, and NMR sample holders. The unit complies with ISO/IEC 17025:2017 requirements for ancillary equipment used in accredited testing labs; its digital log records (accessible via USB export) support GLP-compliant audit trails when paired with validated lab information management systems (LIMS). All wetted surfaces meet USP material compatibility criteria for pharmaceutical cold-chain support.

Software & Data Management

While the IMS-70 operates as a standalone appliance, its embedded controller supports ASCII-formatted event logging (timestamped start/stop cycles, fault codes, ice-full events) via RS-232 serial interface (optional USB-to-serial adapter). Logs are exportable for integration into electronic lab notebooks (ELN) or preventive maintenance scheduling platforms. Firmware versioning and calibration date tracking are retained in non-volatile memory, satisfying FDA 21 CFR Part 11 requirements for secure, attributable data when deployed in regulated QC/QA environments. No cloud connectivity or proprietary software is required—data integrity is preserved through deterministic state-machine firmware architecture.

Applications

• Cooling of enzymatic digests, restriction reactions, and ligase incubations in molecular biology;
• Temperature stabilization during HPLC column conditioning and LC-MS autosampler tray cooling;
• Preparation of low-temperature reaction baths for organometallic synthesis and cryo-PCR;
• Sample preservation during tissue homogenization, cell lysis, and nucleic acid extraction;
• Calibration support for thermocouple validation studies (ice-point reference generation);
• Backup cold storage for short-term transport of diagnostic specimens in clinical labs.

FAQ

What distinguishes flake ice from other ice types in laboratory use?
Flake ice offers superior surface-area-to-volume ratio and conformability compared to cube or nugget ice—critical for rapid, uniform heat extraction from narrow-diameter vessels and high-sensitivity instruments.
Is the IMS-70 compatible with distilled or deionized water supply?
Yes; the float-valve system functions reliably with conductivity <5 µS/cm. Use of DI water reduces mineral scaling and extends evaporator service intervals.
Does the unit require periodic descaling or maintenance beyond standard cleaning?
No scheduled descaling is needed. Routine wipe-down of the ice bin and periodic inspection of the water inlet filter (every 6 months) suffice under typical lab water quality conditions.
Can the IMS-70 be installed under a benchtop or in a confined space?
Minimum rear clearance of 150 mm and top clearance of 200 mm are required for adequate condenser ventilation. It is not rated for fully enclosed cabinetry.
How is ice quality verified for trace metal or organic residue sensitivity?
ZiQi provides optional third-party test reports (ICP-MS and GC-MS) confirming <0.1 ppb heavy metals and <5 ppb total organic carbon (TOC) in produced ice—available upon request for method validation documentation.