The air cleanliness testing of cleanroom

The air cleanliness testing of cleanroom

The air cleanliness of cleanroom, should undertake the following tests:

A  Empty state & static testing
Empty state test: under the conditions of cleanroom has been completed & the purify air conditioning system has been in a state of normal operation, to do the test without process equipment and production personnel indoor.
Static test: under the conditions of cleanroom purify air conditioning system is in normal operation condition and process equipment has been installed, to do the test without production personnel indoor.

B  To do the dynamic testing cleanroom under the normal production.
Clean room air volume, wind speed, positive pressure, temperature, humidity, noise detection, can according to the relevant provisions of the general gm & air conditioning to execute.

Empty state, static testing
A   the preparation before the test
1. Response to the clean room clean air conditioning system to make a thorough clean.

2、Using light scattering particle counter to do the leak detection test for HEPA filter. First determine the dust grain number of upper side of the HEPA air filter static pressure box (or air hose) particle size ≥0.5um should be ≥30000 / l. If not enough, smoke can be introduced, and then began to leak detection. Put the particle counter (or leak detection devices) about 2~3cm to the sampling port of the HEPA filter, can move at a speed of 2 ~ 4 cm/sec, to scan the whole section head at the glue and mounting frame. When the dust particles of particle counter?≥0.5um over 3 grain/min.l (or the penetration rate ＞0.01‰)，that it has obvious leakage, must be prevented leak.

B  Test content
1. The total air supply volume, total return air volume, fresh air volume, exhaust air volume, etc.
2. Clean room pressure value.
3. The section air velocity and air flow of laminar flow cleanroom.
4. The cleanliness of clean work area.
5. Indoor temperature, humidity and the adjust test of control capabilities.
6. The indoor noise of cleanroom.

C  The test method for air cleanliness of the clean work area for the particle size ≥0.5um, it’s better to adopt a light scattering particle counting method. For the particle size ≥0.5um, it can also be used membrane microscope counting method.

Light scattering particle counting method
1、Light scattering particle counter sample volume for 100 rank: each time the sample volume ≥1 liter.
For 1,000~10,000 rank: each time the sample volume ≥0.3 liter.
For 100,000 rank: each time the sample volume ≥0.1 liter.
For the 100 rank cleanroom, it should be used to test by the large flow particle counter. If the conditions are not available, it can be used for each sample not less than 1 liter of particle counter.

2、Sampling Notes：
(1) The sampling tube must be clean, junction is strictly prohibited leakage.
(2) The length of sampling tube, should be based on allowable length of the instrument. If not has the specified, should be less than 1.5 meters.
(3) The sampling nozzle velocity, should close to the average wind speed of cleanroom section. The tester should at the downwind of sampling port.
(4) Sample order should be in accordance with the dust concentration from low to high.

3、Monitoring point arrangement
(1) Testing should be proceed in the clean work area. When the production process without special requirements, sampling height appropriate for one meter from the ground.
(2) The total measuring point of laminar flow clean room not less than 20 points, each measuring point distance is from 0.5um to 2.0um. The number of dust particle size ≥ 0.5 microns allows more than one point. The measuring points of horizontal laminar flow clean room only arranged in the first clean workspace.
(3) Turbulence cleanroom according to clean area, if ≤ 50 square meters are arranged five measuring points (attached map 2). Each additional 20~50 square meters, add 3~5 measuring points.

4、Data processing
(1) Data processing of each measuring point should be three consecutive sampling under conditions of stable operation of test equipment, take the average value, is the point at which the measured value.

(2) For the number of dust particles ≥ 0.5um: laminar flow cleanroom to take each maximum measurement point, turbulence cleanroom averaged each measuring point.

D  Positive pressure measuring should adopt the micromanometers which the accuracy up to 0.01 mm water column.

Dynamic Testing. The operating position in the clean workspace choose a representative measuring point on the airflow wind direction, the test method is the same with empty state & static testing.

Cleanroom Project

Cleanroom Project

办公室                                Office

包装材料仓库（3门）                      Packaging material storage

成品仓库（3门）                      finished store

外包装车间（5门）                      Packaging workshop

换鞋间（2门）                         Shoes Changing Room

洗衣间                                Laundry Room

茶水间                             Tea Room

一次更衣室（男性）                   The first Dressing Room (Male)

一次更衣室（女性）                  The first Dressing Room (Female)

二次更衣室（男性）                    The second Dressing Room (Male)

二次更衣室（女性）                    The second Dressing Room (Female)

手消毒间                            Hand Disinfection Room

风淋室                                Air Shower Room

洁净走廊（3门）                       Cleaning Corridor(3doors)

洁具间（2门）                         Tools Cleaning Room(2doors)

容器消毒间（2门）                     vessel Disinfection Room(2doors)

容器清洁间（2门）                     vessel Cleaning Room(2doors)

灌装车间（4门）                       bottling department(4doors)

静置车间（5门）                      Standing Room(5doors)

乳化车间（4门）                       Emulsion Workshop(4doors)

称量间（2门）                         Materials Dispensing Room(2doors)

拆包间（2门）                        Unpacked Room(2doors)

货淋室（2门）                        Goods Air Shower Room(2doors)

原料仓库                             material warehouse

瓶材暂存间（2门）                     Bottle material temporarily holding room(2doors)

灭菌间（2门）                         Sterilization room（2doors）

洁瓶间（2门）                         Bottle Clean room(2doors)

中间检验室                                The middle inspection room

一次更衣室                               The first Dressing Room

二次更衣室                                The second Dressing Room

微生物检验室                              Microbiology Testing Room

紫外线消毒室                        UV disinfection chamber

监控室                             monitoring room

参观走廊                             Viewing Corridor

配电房                               Power Distribution Room

空调机房                         Air Conditioning Facilities

锅炉房                               boiler room

纯水处理房                            Water treatment room

传递口（4门）                         Pass Through(4doors)

Clean room contamination control ways:

Clean room is the most important and most representative measure air cleaning technology to create a micro-environment clean, clean room is the theoretical basis of the principles of design, operation and maintenance of a good clean room.
     

Clean room for its control objects, sub industrial clean room and biological clean room into two categories.

Industrial clean room chamber to control pollution biotic particles as the main task, and biological clean room is to control of biological particulate pollution as the main task.

However, the non- biological particles or biological particles, or particles or inanimate life particles in clean air technologies are seen as particles, have a property of particles. So no matter what kind of clean room, ways to control particulate contamination is common, such approaches are mainly reflected in the following aspects:

(1) Effectively prevent contamination intrusion indoor outdoor (or indoor pollution Yi to prevent outdoor). This is the main way to control pollution clean room, mainly involving air purification methods, the indoor pressure.
 ( 2 ) rapidly and effectively remove indoor pollution should happen by, mainly related to indoor air distribution, is also a key feature of the clean room reflected .
  (3) Control of pollution sources, reduce the amount of contamination, which occurred mainly involves setting up and management of contaminated equipment and objects entering the clean room and purification. The former belongs to process issues.

Technology support: www.cleanroomffu.com