Jianhu JH-JJ150L Cleanroom Drying Oven

Overview

The Jianhu JH-JJ150L Cleanroom Drying Oven is an engineered solution for controlled thermal processing in regulated laboratory and production environments where particulate control, thermal stability, and material compatibility are critical. Unlike standard industrial ovens, this model integrates cleanroom-grade construction principles—including seamless SUS304 stainless steel interior surfaces, low-outgassing insulation, and filtered air exchange—to minimize contamination risk during drying, curing, stress-relief annealing, or pre-bake operations. Its operational principle relies on horizontal forced-air convection, with a top-mounted circulation motor driving laminar airflow across the chamber via a precision-balanced alloy impeller. Temperature regulation employs a PID-controlled LED digital controller (±1°C accuracy) paired with a calibrated PT100 RTD sensor (±1% FS), ensuring repeatable thermal profiles essential for process validation in electronics, pharmaceutical excipient drying, PCB manufacturing, and coated substrate curing.

Key Features

• Stainless steel inner chamber (SUS304, 1.0–1.2 mm thickness) with mirror-finish welds and zero crevice design to inhibit particle accumulation and simplify cleaning.
• Dual-port air management system: 60 mm adjustable intake port with filter cotton and 60 mm manually regulated exhaust port—both configurable for positive-pressure or balanced-flow operation.
• High-efficiency thermal insulation: 90 mm ceramic fiber blanket (100K grade) providing low thermal conductivity (<0.04 W/m·K at 200°C) and minimal heat loss.
• Modular heating architecture: Three sheathed U-tube infrared heaters (1.2 kW each, total 3.6 kW), mounted within the left-side ductwork for uniform radiant + convective energy delivery.
• Robust mechanical integrity: Reinforced frame constructed from 5# angle steel; load-bearing base structure with localized 2.0 mm steel reinforcement for long-term dimensional stability under thermal cycling.
• Electrical safety compliance: Integrated leakage-current protection, motor overload relay, grounding continuity monitoring, and CE-marked contactors (Delixi brand) meeting IEC 61000-4 immunity standards.

Sample Compatibility & Compliance

The JH-JJ150L accommodates substrates up to 500 mm wide and 500 mm deep, supporting standard industry fixtures including perforated stainless steel trays, quartz boats, and ceramic crucibles. Its chamber geometry and airflow path are validated for uniform temperature distribution per ASTM E2207–18 (Standard Practice for Calibration of Ovens and Furnaces). While not certified as a standalone cleanroom device, its construction meets supplementary requirements for ISO 14644-1 Class 5–8 cleanroom-adjacent applications—particularly when installed with HEPA-filtered supply air and operated under negative pressure relative to the surrounding environment. The oven supports GxP-aligned workflows through optional audit-trail-ready data logging (via RS485 interface) and is compatible with FDA 21 CFR Part 11–compliant software platforms when integrated into validated systems.

Software & Data Management

The built-in HS48S-99.99 timer enables programmable dwell cycles with manual start/stop initiation and audible-visual alarm notification upon completion. For traceable operation, the oven’s RS485 serial port allows connection to external SCADA or LIMS platforms for real-time temperature logging, event timestamping, and remote parameter adjustment. When deployed in regulated settings, users may configure periodic calibration verification points using NIST-traceable reference thermometers, with records stored in accordance with GLP Annex 11 and ISO/IEC 17025 documentation requirements. All electrical components—including the PID controller, contactors, and power distribution unit—are selected for ≥10,000-hour MTBF and rated for continuous duty at 250°C ambient.

Applications

This oven serves cross-industry thermal processing needs requiring both cleanliness and repeatability: moisture removal from hygroscopic powders (e.g., API intermediates, battery cathode precursors); post-deposition solvent evaporation in thin-film fabrication; stress relief of FR-4 and polyimide PCB laminates; crosslinking of UV-curable inks and conformal coatings; pre-baking of optical lenses and ceramic substrates; and residual solvent purging from vacuum-deposited films. Its stable ±0.5°C fluctuation and ≤2% uniformity support method transfer between R&D and pilot-scale production, particularly where thermal history directly impacts crystallinity, adhesion strength, or outgassing behavior.

FAQ

What is the maximum allowable operating temperature, and how is thermal stability maintained at 250°C?

The JH-JJ150L is rated for continuous operation up to 250°C. Stability is achieved through dual-layer thermal feedback: the primary PT100 sensor drives PID modulation of heater power, while secondary thermal cutoffs (mechanical and electronic) activate at 270°C to prevent runaway. Chamber uniformity is verified at three load conditions (empty, 50% loaded, full) per IEC 60068-3-5.

Can this oven be integrated into a Class 5 cleanroom HVAC system?

Yes—its filtered intake/exhaust ports and non-shedding stainless interior permit integration as a local thermal station. Required modifications include upstream HEPA filtration, interlocked door switches, and differential pressure monitoring to maintain room-class integrity.

Is the temperature controller compliant with 21 CFR Part 11 for electronic records?

The embedded controller does not provide electronic signatures or audit trails natively; however, its RS485 output supports third-party validation-ready data acquisition systems that meet Part 11 requirements when properly configured and qualified.

What maintenance intervals are recommended for the circulation motor and heating elements?

The 180 W motor requires biannual inspection of bearing clearance and impeller balance; heating elements are rated for 30,000–40,000 hours at ≤220°C and should be resistance-tested annually per IEC 60335-1 Clause 19.

Does the oven include validation documentation (IQ/OQ/PQ protocols)?

Factory-supplied documentation includes electrical schematics, material certifications (SUS304 mill test reports), and factory calibration certificates. Site-specific IQ/OQ protocols must be developed by the end user or qualified service provider per ISO 13485 or GMP Annex 15 guidelines.