HJ SW-CJ-2K Wall-Mounted Air Purification Unit

Overview

The HJ SW-CJ-2K Wall-Mounted Air Purification Unit is an engineered solution designed specifically for localized air quality control in controlled laboratory environments, cleanroom retrofits, and critical work zones requiring continuous particulate and microbial reduction. Unlike freestanding or ceiling-suspended units, the SW-CJ-2K integrates directly into wall architecture—minimizing floor space occupation while enabling strategic placement near high-risk or high-activity areas (e.g., sample preparation benches, microbiological hoods, or instrument calibration stations). Its core filtration architecture combines a pre-filter, high-efficiency particulate air (HEPA) filter rated at ≥99.995% @ 0.3 µm, and an integrated low-pressure mercury UV-C lamp (254 nm) positioned within the recirculation path to inactivate airborne microorganisms. The unit operates on a closed-loop recirculation principle: ambient air is drawn through adjustable return inlets (configurable as single- or multi-point based on room width), conditioned via filtration and UV exposure, then discharged as ISO Class 5 (≤3.5 particles ≥0.5 µm per liter) air at controlled velocity (0.3–0.6 m/s). This design supports dynamic, non-disruptive disinfection—eliminating reliance on chemical fogging or downtime-intensive sterilization protocols.

Key Features

• Wall-integrated mechanical architecture optimized for retrofit applications in existing lab spaces—no structural reinforcement required beyond standard wall-mounting hardware.
• Dual-speed centrifugal fan system delivering stable airflow at 500 m³/h (single-unit) with acoustic optimization achieving ≤62 dB(A) under full-load operation.
• Programmable digital controller supporting up to six independent daily time slots; enables unattended, repeatable disinfection cycles aligned with shift schedules or procedural workflows.
• Real-time diagnostic interface with LCD display: monitors filter pressure drop, UV lamp operational status, motor temperature, and fault codes (e.g., “F01: UV lamp failure”, “F03: Fan obstruction”).
• Infrared remote control with full functionality mirroring manual panel inputs—enabling operation from up to 8 meters without line-of-sight constraints.
• Modular upgrade path: Optional integration of bipolar ionization or cold plasma modules (via certified third-party OEM interfaces) for enhanced VOC decomposition and rapid bioburden reduction.

Sample Compatibility & Compliance

The SW-CJ-2K is intended for use in non-explosive, non-corrosive indoor atmospheres compliant with IEC 61000-6-3 (EMC emission standards) and IEC 60335-1 (general safety requirements for electrical appliances). It meets ISO 14644-1:2015 Class 5 performance criteria at the supply outlet when installed per manufacturer-specified ducting and mounting guidelines (160 mm rigid PVC ducting mandatory for balanced static pressure management). While not classified as medical-grade equipment under FDA 21 CFR Part 820, its HEPA/UV configuration aligns with ISO 14698-1 guidance for biocontamination control in laboratories handling low-to-moderate risk biological agents. Filter replacement intervals are defined by differential pressure monitoring—not calendar-based—ensuring resource-efficient maintenance aligned with actual usage profiles.

Software & Data Management

The unit operates via embedded firmware (v2.4.x) with no external PC dependency. All operational parameters—including runtime logs, cycle history, UV exposure duration, and fault timestamps—are stored in non-volatile memory for minimum 12 months. Audit-ready records can be exported via RS-485 serial interface (Modbus RTU protocol) to facility-wide building management systems (BMS) or LIMS platforms. Firmware updates are performed via secure USB interface with SHA-256 signature verification—supporting traceability requirements under GLP and GMP Annex 11 frameworks. No cloud connectivity or remote access capabilities are implemented, preserving network isolation integrity in regulated lab environments.

Applications

• Supplemental air purification adjacent to laminar flow cabinets or biosafety cabinets where ambient recirculation introduces cross-contamination risk.
• Retrofit air hygiene in legacy labs lacking full cleanroom infrastructure—particularly in QC/QA microbiology labs performing environmental monitoring per ISO 14694.
• Localized particle control during precision weighing, lyophilization setup, or sterile filtration validation activities.
• Continuous deactivation of airborne fungi and Gram-negative bacteria in humidity-controlled storage rooms housing reference standards or hygroscopic reagents.
• Supporting ISO/IEC 17025 accredited testing labs requiring documented evidence of airborne particulate mitigation during method validation.

FAQ

What certification documentation is provided with the SW-CJ-2K?
Factory-issued test reports include airflow calibration (ISO 5220), UV irradiance mapping (at 1 m distance), and sound pressure level validation—all traceable to CNAS-accredited metrology labs.
Can the unit operate continuously for 24/7 duty cycles?
Yes—rated for continuous operation at 40°C ambient with derated airflow above 35°C; thermal protection circuitry automatically reduces fan speed if internal temperature exceeds 75°C.
Is the HEPA filter replaceable onsite without tools?
Yes—filter access is via two captive thumb screws; full replacement takes <90 seconds and requires no recalibration.
Does the UV lamp require periodic intensity verification?
Per IEC 62471, UV-C output decays over time; users must verify irradiance ≥40 µW/cm² at lamp surface annually using NIST-traceable radiometer—replacement recommended at 8,000-hour service life.
How is static pressure loss managed across variable duct lengths?
The unit includes a calibrated static pressure port (0–500 Pa range) and adjustable damper ring; installation must maintain total system resistance ≤120 Pa to sustain rated airflow and noise compliance.