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Construct a localized ISO Class 5 (Class 100) modular clean booth within existing workshop for precision assembly, sensor packaging and final assembly of senior-oriented smart health watches and smart wristbands with blood glucose/heart rate detection functions, ensuring particulate-controlled environment for core assembly processes of senior smart health devices to enhance product yield and patient data monitoring reliability.
Hubei Chunhui Technology Co., Ltd. (Chunhui Technology), established on November 19, 2014, with registered capital of RMB 2,325,581, is a high-tech enterprise focusing on R&D and design of mobile communication terminal products, committed to smart wearable device R&D and mobile health service operations. The company provides comprehensive mobile terminal solutions covering ID design, structure, hardware, software, testing, manufacturing and quality assurance. It operates three major support hubs: Shenzhen Terminal R&D Center, Wuhan System R&D Center and Operation Service Center. The company specializes in mobile health senior care enterprise cloud and R&D of senior-oriented smart wearable products, aiming to provide mobile health senior care cloud services to 1,000 enterprises and 100,000 health service professionals, benefiting the safety, health and happy retirement of 10 million senior home users.
Construct a modular Class 100 clean booth occupying approx. 180 m² within existing workshop, dedicated to core processes including senior-oriented smart health watch and blood glucose/heart rate smart wristband display bonding, precision sensor alignment & packaging, and final waterproof sealing assembly. Functional zones: core Class 100 assembly area (approx. 120 m²), gowning buffer zone (approx. 15 m²), air shower & material staging zone (approx. 15 m²), utility zone (approx. 30 m²). Aluminum alloy frame structure with anti-static transparent PVC panels. Full-coverage FFU fan-filter units overhead, vertical unidirectional airflow design, air changes ≥240 times/hour. Fresh air undergoes three-stage filtration (pre-filter + medium filter + ULPA).
This project is entrusted to our experienced cleanroom construction team, which consists of 5 project managers, 15 engineers, and 40 skilled technicians. All team members hold relevant professional certifications and have undergone specialized training in cleanroom construction, thereby ensuring the project's high quality and timely completion.
Preparation & “non-stop” execution strategy
Deiiang coordinated with the client to schedule high‑noise tasks during shift breaks. The 40-day construction plan was strictly followed with daily safety briefings and evening progress reviews.
Structural progress (40 days sprint):
Days 1-10: Aluminum frame and FFU hangers assembly; Days 11-20: Enclosure panels, anti-static PVC flooring with copper mesh grounding; Days 21-30: HVAC, air shower, pass box and environmental sensors; Days 31-35: System integration and filter balancing; Days 36-40: Third-party static/dynamic cleanroom testing.
Pain point #4 – Last‑minute design change (air shower direction)
Chunhui requested to change the air shower orientation to fit new production flow, which would normally delay delivery by 10 days. Deiiang rapidly re‑engineered the module drawings, deployed a backup production line and finished the modified parts within 5 days, simultaneously preparing on‑site groundwork – zero idle time, no impact on critical path.
Pain point #5 – Dynamic maintenance of ISO 5
Static acceptance was easy, but real operation with personnel walking and material transfers often causes particle bursts. Deiiang performed a 7‑day stress test simulating full production activity, adjusting FFU speeds and adding local high‑efficiency filters. The result: dynamic particle counts remained consistently below ISO 5 limits (≤3,200 particles/m³ for ≥0.5μm).
Key achievements: Completed construction with zero safety incidents, 100% on‑schedule, and the client’s daily production was never halted.
Strict acceptance protocol (GB50591-2020):
Static cleanliness: average particle count (≥0.5μm) ≤3,200/m³ – well within ISO 5 limit (3,520).
Dynamic (operational) cleanliness: full production simulation maintained Class 100 throughout.
168‑hour continuous run: temperature (22±2°C), RH (45±5%), pressure differential all stable.
Smart FFU system integrated with remote alarming and data logging.
Turnkey delivery plus value‑added services:
Deiiang conducted on‑site training (garment protocol, air shower use, pass box discipline) and delivered a complete O&M manual with filter replacement schedules. Remote IoT monitoring enables proactive maintenance alerts, ensuring long-term reliability.
Quantified project value:
• Annual capacity: 300,000–500,000 units of senior smart watches/glucose wristbands.
• Yield improvement: sensor packaging/bonding increased from 90% to >97%.
• Cost efficiency: modular clean booth cost = 30–40% of a conventional fixed cleanroom; construction time reduced by >50%.
• Social impact: accurate blood glucose and heart rate data safeguards seniors’ health, enabling reliable mobile health cloud services for 10M+ families.
Deiiang’s proven expertise: From reverse BIM modelling, distributed load engineering, CFD airflow optimisation, to dynamic cleanroom stabilisation – the project demonstrates Deiiang’s end‑to‑end strength in high‑precision modular clean environments for electronics manufacturing. The client now owns a fully controllable, competitive core‑assembly line, and our team’s “zero downtime, zero quality compromise” approach has set a benchmark in the industry.
Total built area: 180 m² (core Class 100 area 120 m² + support zones). Cleanliness: ISO 5 (Class 100) vertical unidirectional flow, ULPA filtration. Temperature: 22±2°C, RH 40-60% (target 45±5%). Process coverage: display bonding, sensor micro‑alignment (tolerance ±0.03mm), antenna assembly, waterproof sealing IP67/IP68.
• Distributed lightweight suspension solved slab overloading.
• Reverse BIM modeling from point cloud → digital twin.
• IoT FFU fleet with cloud-based real-time particle monitoring.
• Seven‑day dynamic stress test to guarantee operational stability.
• 40‑day construction with concurrent on-site prep and off-site module fabrication.
All acceptance criteria exceeded. The client’s CTO stated: “This small project ignited a leap in our core manufacturing competitiveness.” Deiiang continues to provide 24/7 remote assistance and annual maintenance planning.
Deep root‑cause analysis: Instead of quoting blindly, we spent days on Chunhui’s production line to understand the true yield bottleneck – outsourcing’s low consistency – and proposed the modular clean booth as the most cost‑effective solution.
Non‑disruptive execution mantra: BIM modelling, early site preparation and parallel prefabrication ensured production continued without a single hour of downtime.
Class 100 dynamic hold capability: our team’s obsession with CFD and real‑time tuning delivered a “plug‑and‑produce” environment that passes the toughest third‑party audits.
Smart lifecycle care: The built‑in IoT platform transforms the booth from a static facility into an intelligent, remotely managed asset.
This project has been recognized as a benchmark modular cleanroom case for wearable health IoT manufacturing across central China.
