팬 필터 단위 (FFU)

1. Product Overview

FFU, short for Fan Filter Unit, is an air purification device that integrates a fan and a high-efficiency filter into a single unit. FFUs are typically installed in the ceiling grid of cleanrooms, serving as terminal air supply units that deliver high-efficiency filtered clean air into the cleanroom environment.

The FFU is one of the core equipment components in modern cleanrooms, widely used in industries with strict air cleanliness requirements, including pharmaceuticals, biotechnology, semiconductor manufacturing, electronics production, hospitals, and food processing.

2. Working Principle

The working principle of an FFU can be summarized in three stages: fan-driven air intake, filtration and purification, and uniform air supply.

First, Fan-Driven Air Intake. The internal fan of the FFU draws air from the ceiling return plenum or static pressure chamber above the cleanroom.

둘째, 여과와 정화.공기는 내장 고효율 필터 (HEPA, 고효율 입자 공기 필터) 또는 매우 낮은 침투 필터 (ULPA, 매우 낮은 침투 공기 필터)를 통해 통과하여 공기에 있는 입자, 박테리아, 먼지 및 기타 오염물질을 효과적으로 잡습니다.

셋째, 공기 공급 통합.필터링된 청정한 공기는 FFU 출구를 통해 청정실로 균등하게 배달되어 필요한 청정도 수준을 유지하기 위해 단방향 또는 비 단방향 공기 흐름 패턴을 만듭니다.

선택된 필터 효율성에 따라 FFU는 ISO 클래스 5에서 ISO 클래스 8까지의 클린룸 환경을 달성할 수 있습니다.

3. 제품 구조 및 성분

FFU는 다음과 같은 핵심 구성 요소로 구성되어 있습니다.

Fan: Typically a high-efficiency centrifugal fan or EC fan, characterized by low noise, low energy consumption, and adjustable airflow capacity.

High-Efficiency Filter: Includes HEPA filters (99.97% or higher efficiency for 0.3 micron particles) and ULPA filters (99.999% or higher efficiency for 0.12 micron particles).

Housing: Generally manufactured from galvanized steel sheet, stainless steel sheet, or aluminum alloy, providing good airtightness and structural strength.

구부된 페이스 플레이트 / Diffuser: 공급 공기의 균등한 분배를 보장하기 위해 FFU 출구에 설치됩니다.

제어 단위: 속도 컨트롤러, 차압 경보 장치 및 원격 모니터링 인터페이스를 포함하여 FFU의 로컬 또는 중앙 집중 제어를 가능하게 합니다.

Sealing Device: Includes sealing gaskets and sealing tapes to ensure a tight seal between the FFU and the ceiling grid frame, preventing unfiltered air from leaking into the cleanroom.

4. Features and Advantages

First, Modular Design. FFUs adopt standardized module dimensions, allowing flexible quantity configuration based on cleanroom area. They are easy to install and remove, facilitating cleanroom renovation and expansion.

Second, Independent Control. Each FFU can be independently controlled for start/stop and airflow speed, enabling demand-based air supply according to the actual requirements of different zones, thereby saving energy.

Third, Low Operating Noise. Utilizing low-noise fans and optimized airflow path designs, FFUs operate at low noise levels, making them suitable for laboratories and production environments with strict noise requirements.

Fourth, High Filtration Efficiency. Equipped with HEPA or ULPA filters, FFUs effectively remove microscopic airborne particles, ensuring cleanroom air quality.

Fifth, Easy Maintenance. Filter replacement is simple, and the fan unit can be serviced from above or below the ceiling without disrupting normal cleanroom operations.

Sixth, Energy Efficiency and Environmental Friendliness. EC fan technology offers low energy consumption, and speed can be adjusted according to actual demand, reducing unnecessary energy waste.

5. Technical Specifications (Standard)

Fan Type: Centrifugal fan or EC fan

Power Supply: AC220V 50Hz or AC380V 50Hz

Standard Dimensions: Typically 1175mm × 575mm or 1175mm × 1175mm, can also be customized based on ceiling grid dimensions

HEPA Filtration Efficiency: 99.97% or higher for 0.3 micron particles

ULPA Filtration Efficiency: 99.999% or higher for 0.12 micron particles

Rated Airflow: 500 to 2000 cubic meters per hour (varies by size and model)

External Static Pressure: 50 to 250 Pascals (adjustable)

Noise Level: Less than 55 dB(A)

주택 물자: 직류 전기를 통한 강철판, 스테인리스 판, 또는 알루미늄 합금

제어 방법: 5 속도 조정, 단계없는 속도 조정, 또는 중앙 통제 시스템

Operating Temperature: 0 to 40 degrees Celsius

Operating Humidity: Less than 95% relative humidity

6. Product Classification

Standard FFU: Utilizes AC fans or multi-speed DC fans, suitable for conventional cleanroom environments.

EC FFU: Utilizes EC fans (Electronically Commutated fans), offering higher energy efficiency and more precise speed control, ideal for applications requiring energy savings and accurate control.

Low-Noise FFU: Features special noise reduction design, operating at even lower noise levels, suitable for noise-sensitive environments such as laboratories and hospitals.

Corrosion-Resistant FFU: Housing and fan manufactured from corrosion-resistant materials, suitable for cleanroom environments with corrosive gases or chemicals.

Explosion-Proof FFU: Equipped with explosion-proof motor and electrical components, suitable for special cleanroom environments with flammable or explosive gases.

Ceiling-Mounted FFU: Standard installation type, recessed into ceiling grid.

Wall-Mounted FFU: Installed on walls, suitable for space-constrained areas or special airflow pattern requirements.

7. 응용 분야

FFU는 엄격한 공기 청결성 요구 사항을 가진 다양한 장소에서 널리 사용됩니다.

Pharmaceutical Industry: Used in drug production workshops, sterile preparation workshops, API purification and packaging workshops, complying with GMP requirements. FFUs provide ISO Class 5 to Class 8 cleanroom environments, ensuring air quality during pharmaceutical production.

Biotechnology and Life Sciences: Used in biological laboratories, cell culture rooms, genetic laboratories, etc., preventing airborne microorganisms and particles from contaminating experimental samples.

Semiconductor and Electronics Manufacturing: Used in chip fabrication, wafer processing, LCD panel production, precision electronic component assembly, etc. The semiconductor industry requires extremely high cleanliness levels, typically ISO Class 1 to Class 5, and FFUs are key equipment for achieving this.

Hospitals and Medical Facilities: Used in operating rooms, ICU wards, sterile treatment rooms, central sterile supply departments, etc. FFUs provide clean air to reduce patient infection risks.

Food and Beverage Processing: Used in food packaging workshops, dairy filling lines, beverage production workshops, etc., preventing airborne microorganisms from contaminating food products.

Precision Instruments and Optics Manufacturing: Used in lens assembly, precision instrument calibration, optical coating, and other processes requiring high environmental cleanliness.

Laboratories and R&D Centers: Used in chemical laboratories, physics laboratories, materials science laboratories, etc., protecting experimental samples and precision instruments from airborne particle interference.

Data Centers and Computer Rooms: Used in server rooms, telecommunications rooms, etc. FFUs help maintain the clean environment and appropriate temperature required for equipment operation.

Aerospace and Defense: Used in spacecraft assembly, precision navigation equipment manufacturing, weapons system maintenance, and other applications with special cleanliness requirements.

Animal Housing Facilities: Used in SPF animal rooms, laboratory animal centers, etc., preventing airborne pathogens from entering animal housing areas.

8. Comparison with Other Cleanroom Equipment

FFU vs. Central HVAC System: Traditional central HVAC systems supply air to cleanrooms through centralized air handling units and long ductwork, resulting in high resistance, high energy consumption, and difficulty in independently adjusting airflow for different zones. FFUs use distributed air supply, with each unit independently controlled, offering high flexibility and significant energy savings.

FFU vs. Fan Filter Box: Fan filter boxes are typically larger in size, installed outside the cleanroom, and connected to terminal air supply devices through ducts. FFUs are compact and mounted directly on the ceiling, saving space and offering easier installation and maintenance.

FFU vs. High-Efficiency Air Supply Diffuser: High-efficiency air supply diffusers do not have an integrated fan and rely on external fans for air supply power. FFUs have their own built-in fan, do not depend on external air pressure, and offer more flexible installation, especially suitable for renovation projects and establishing localized clean zones.

9. 선택 가이드

청결성 요구 사항: 필요한 ISO 청결성 클래스에 따라 적절한 필터 유형을 선택하십시오.ISO 클래스 5 이상의 경우 HEPA 또는 ULPA 필터를 선택합니다.ISO 클래스 6 이하의 경우 중간 효율 필터가 적합할 수 있습니다.

Cleanroom Area and Height: Calculate the required number of FFUs based on total cleanroom area and ceiling height. Typically, 0.5 to 1 standard-sized FFU is configured per square meter, with the exact quantity determined by the required air change rate.

Airflow Pattern: Unidirectional flow cleanrooms require dense FFU arrangement to achieve uniform vertical laminar flow. Non-unidirectional flow cleanrooms can use fewer FFUs, supplemented by return air columns or return air walls.

Noise Requirements: For noise-sensitive environments such as hospital wards and laboratories, select low-noise FFUs and pay attention to overall installation sound insulation.

Control Method: Choose local speed control or centralized control system. Large cleanrooms are recommended to use centralized control systems for unified management and energy monitoring.

Maintenance Convenience: Consider the ease of filter replacement. Select FFU models that can be serviced from inside the cleanroom or from above the ceiling.

Installation Conditions: Verify that the ceiling structure can support the weight of the FFUs and that sufficient overhead space is available for installation and maintenance.

Budget and Energy Consumption: EC FFUs have higher initial investment but lower operating energy costs. AC FFUs have lower initial cost but higher long-term energy consumption. Consider both factors based on project duration and budget.

10. 설치 및 유지 보수

설치 주요 점: 설치 전에 천장 그리드가 안전하고 수평한지 확인하십시오.FFU 지원 프레임을 그리드에 설치하여 레벨을 확인합니다.FFU를 프레임에 넣고, 밀접 가스켓을 사용하여 프레임과 단단한 밀접을 달성합니다.전원과 제어 케이블을 연결하여 적절한 접지를 보장합니다.구부된 페이스 플레이트 또는 디푸저를 설치하십시오.테스트, 팬 작동 상태 및 속도 조정 기능을 확인하기 위해 전원을 켜십시오.

Daily Maintenance: Regularly check FFU operating status, including airflow speed, noise, and vibration. Observe the differential pressure indicator and replace the filter promptly when the pressure drop reaches the replacement value. Clean the intake and outlet grilles of the FFU. Inspect sealing gaskets for aging or damage. Periodically conduct airflow speed tests and filter integrity tests (PAO leak testing) on FFUs.

Filter Replacement Procedure: Turn off FFU power. Access the service panel from above or below the ceiling. Remove the old filter. Clean the filter mounting frame. Install the new filter, ensuring proper sealing. Restore power and test operating status.

Common Troubleshooting: If the fan does not operate, check power connections, fuses, and control switches. If airflow is insufficient, check whether the filter is clogged or the fan speed setting is too low. If noise is excessive, check whether the fan impeller is balanced or if foreign objects have entered. If vibration is excessive, check whether the fan mounting screws are loose.