About the clean room

Clean Room (Clean Room), also known as dust-free workshop, Clean Room and Clean Room. The main functions of the clean room for indoor pollution control, there is no clean room, contamination sensitive parts can't batch production. Within the FED - STD - 2, clean room is defined as a air filtration, distribution, optimization, construction materials and equipment room, specific rules of the operating procedures to control the air particulate matter concentration, so as to achieve the appropriate level of particulate cleanliness. Clean degree and the continued stability of the pollution control, is the core of the clean room quality inspection standard, the standard based on factors such as regional environment, degree of purification, divided into several levels, common international standards and domestic regional industry standards, some well-known purification engineering company, in addition to a standard, also has its own execution is higher than the international standard of purification, purification ability and environment adaptability than international brand.

1 introduction

Clean room is within the scope of a certain space in the particles in the air, bacteria and other harmful air pollutants, and the indoor temperature, cleanliness, interior pressure, air velocity and air distribution, noise, vibration and lighting, static control within the scope of a certain demand, and the special design of the room. That is no matter how the outside air conditions change, its indoor all one can maintain the original set requirements of cleanliness, temperature and humidity and pressure performance characteristic.

Clean room of the main function is to control products (such as silicon) contact by clean living and temperature and humidity of the atmosphere, can make the products in a good environment of production and manufacturing in the space, this space we call it a clean room. According to international practice, dust-free purification level mainly according to the division per cubic meter of air particle diameter is greater than the standard number of particles to rules. That is the so-called no dust, clean is not 100% but control on a very tiny amounts of units. Of course accord with standard of dust particles in the standard relative to our common dust is small, but for optical structure, even just a bit of dust will be a very negative impact, so on the optical structure of production, clean is the inevitable requirement.

Per cubic meter will be less than 0.3 micron particle size below the number of dust control in 3500, to reach the international clean grade A standard. Chip level production and processing of dust-free standards higher than that of A grade to the requirement of dust, such high is mainly used in some high level chip production. 0.5 uM and dust quantity are strictly under control within the 1000 per cubic inch, which is commonly known as 1 k levels in the industry.

Empty state, has been finished and can be put into use in the clean room (facilities). It has all the relevant services and functions. However, no operator operation of equipment within the facility.

Static: all kinds of function, set installation is complete, can according to the set used or are using clean room (facilities), but there is no operating personnel within the facility.

Movement: in the normal use of the clean room, service function, equipment and personnel; If you need, can work in the normal.

Uniflow cleanroom principle (laminar flow)

In the clean room, from the air supply outlet to the inlet, the section of airflow through the way almost no change, plus intake plenum and equalizing all flow effect and high efficiency filter, full chamber cross section on flow velocity is uniform, and unidirectional parallel flow in a work area, at least no eddy current. This is the three major characteristics of uniflow cleanroom. Streamline one-way parallel, here refers to streamline parallel to each other, when a single direction.

Uniflow cleanroom is turbulent flow from the Reynolds number of judgment, so the so-called laminar flow clean room laminar flow and the laminar flow on the fluid mechanics is a completely different concept. Laminar flow clean room, therefore, the term is not appropriate, some foreign standards and the article also points out that, for example, the British standard BS - 5295 the so-called laminar flow clean room was defined as uniflow cleanroom, just take care of habits in parentheses indicate for laminar flow. Former federal republic of Germany standard VDl - 2083 with the term "non turbulent displacement flow", and points out that in the note, the concept of laminar flow appeared earlier in the laminar flow clean room just for the sake of difference between the turbulence of (random) flow clean room and in the use of idioms, the precise meaning of "laminar flow system is not stratified flow, but the displacement turbulent flow, mentioned in this chapter, the concept of the gradient is turbulent flow. In fluid mechanics, the flow state can also be called parallel flow or uniflow. In China in 1977 in the air clean technology measures, chose the term parallel flow, behind the term is also pointed out that traditionally called "layers".

In the uniflow clean room, clean air is not a one or a few shares, but fills the entire room section, so the clean room not by clean air on indoor dirty air mixing dilution effect, but by the launch of clean air will indoor dirty air along the entire section to the outdoor, achieve the purpose of purifying indoor air. So, the former federal republic of Germany have said uniflow cleanroom airflow for "slug flow", "horizontal pushing flow" of the former Soviet union called "squeezed" weak air jet. Clean air is just like a piston, along the "cylinder" room, forward (below), and make the dust particles (below), before can not return to the original high dust concentration of the air squeeze out of the room.

At uniflow cleanroom and uniflow purification equipment, two filters can be found along the wall and take it at the bottom of the reverse flow. The air will be sent at the bottom of the pollution transfer to the upper and down, undermined the "state of piston flow", great harm. For opening and the outside world have similar partial purification equipment, clean bench, for example, the air ejector outside air pollution, must reduce the filter frame space on the design of the invalid area, try to make the space more effective idea wind wall as far as possible close to the filter section.

Through the above analysis, we can think to ensure uniflow cleanroom characteristics (high cleanliness and self-purification ability to recover quickly) one of the important prerequisites are two: (1) to flow cleanliness; (2) to flow piston flow situation;

For cleanliness to flow, to the above efficient filter ventilation uniflow cleanroom it is not a problem, for the coming flow of the piston flow ", is a ~ step analysis.

According to the principle of fluid mechanics, the flow situation of flow conditions on the later will have the important role of direct supply air export OuDeLai airflow is work flow.

To flow turbulence sex is big, will affect the back of the uniflow features; To flow is not full of flowing section, behind will influence whether can form "piston flow and forming speed; And not filled with liquid to flow section is also a factor to flow element. So, under the condition of using high efficiency filter, necessary conditions to guarantee the uniflow cleanroom characteristics are "piston flow", and the necessary conditions of piston flow is to flow with flowing section. However, for a room instead of a pipe, let the air flow from beginning to end completely full of flow section is also not realistic.

Originally, do believe that this kind of unidirectional parallel airflow should be full of the clean room, but that is technically and economically will be unfavourable. With the development of knowledge, people and points out that the uniflow has only "in the limited area all along the parallel flow with constant speed air flow", and that can strongly inhibit the vortex. Through the whole space uniflow dominant features of the clean air room, also known as the uniflow cleanroom. That is to say, does not require the whole room with one-way parallel to the streamline, uniform speed, no eddy current, but requires only a one-way parallel flow characteristics of dominant in this room, for example, in the entire workspace this layer ensures the uniflow space, this room is uniflow cleanroom. Introduced in front of the domestic and foreign relevant standards and measures of uniflow cleanroom achieve high cleanliness, is refers to in the work zone of cleanliness. Therefore, dense arrangement of streamlined diffuser top conveying and the orifice plate, has also been used as a means of implement vertical uniflow.

The principle of turbulence,

Clean room air flow state to distinguish, according to its main divided into turbulence (FeiChanXiang flow clean room), uniflow cleanroom and radial flow clean room (there is also a vector flow clean room), this section mainly discuss the turbulence clean room. It has already been pointed out that whether which kind of clean room, is turbulent flow. Why not call turbulent flow clean room?

Turbulence is the name of the cleanroom borrowing in Japanese, but Japanese turbulence is the meaning of turbulent flow, and the earliest in the air clean technology measures, China officially adopted the term turbulence is both the meanings of the turbulent flow and different from the turbulence on the fluid mechanics the proper nouns. Internationally used to call this clean room FeiChanXiang flow clean room.

The so-called turbulence clean room, various forms of air supply generally include the following:

(1) high efficiency filter top to send (with and without diffusion plate diffuser

2 streamlined diffuser in jacking

(3) local orifice to send

(4) side to send 

5 purification method

Air purification method

1, overall purification: can be divided into laminar and turbulent flow. Laminar flow is refers to the air flow to the other side by side fully to the same speed, make indoor dust or bacteria will not be flat out spreading around the outside, and achieves good antibacterial effect.

(1) high efficiency filter aseptic technique: air clean mainly by high or super high efficiency filtration equipment, to purify air transport within a specific environment and keep the air cleanliness. Filter clean principle: (1) net interdiction leave; (2) screen Kong Zu leave; (3) electrostatic attraction detention; (4) inertia collision and Brownian motion resistance. Therefore, filter clean technology is the result of a combination.

2 filter material structure: biological filter material used in clean room level most efficient or super efficient filter material, the filter material used are: glass cotton, senior pulp filtration material, the filter material asbestos fiber filter material, chlorinated polyvinyl chloride fiber filter material, etc. Efficient filter material for 0.5 microns particles in the air of detention rate can reach 90% ~ 99%, super efficient filter material detention by 0.3 microns particles of more than 99.9%.

2, partial purification

(1) clean laminar flow hood, clean laminar flow hood is hospital local air purification device. Can generally be a vertical laminar flow way, with transparent curtain. The entire enclosure can keep high cleanliness levels (million million) air. The clean laminar flow hood can be used for protection of immunocompromised patients, so also known as aseptic sickbed laminar flow hood.

2 purification work station: the horizontal or vertical laminar flow way to purify the air in the box body, can make the work station in purification to achieve a high level.

(3) electrostatic adsorption aseptic purification technology: electrostatic adsorption aseptic is using the principle of industrial electric precipitation, the miniaturization technology innovation. (1) the discharge electrode and aluminium honeycomb box collect very thin lines form a level line device; (2) the mirror force charged adsorption.

Currently has a three-level purification device, namely pre filter - high efficiency filter, activated carbon adsorption, combined positive ion electrostatic adsorption in addition to bacteria, and make use of large air purification, in order to assure indoor air purification, better solve the key departments such as the operating room, ICU, maternal and child hospital, blood dialysis room air continuous disinfection of some cases, can make the hospital purification of indoor air cleanliness levels up to 100000 ~ 10000.

Anion anion purification technology: [4] is a negatively charged functional groups, reversible change can occur, there is a very short time, itself has no ability to kill microorganisms, mainly consisted of charged ions combine with the particles in the air, especially microbial particles, forming multiple particles condensed larger settlement, thus and quickly achieve the purpose of purifying air. Only when you have some chemical properties of anion in air, such as active oxygen ions, they has the ability to kill microbes, violations of the protein anion in air purification ability are limited, therefore, the microbial particles in the air can only reach 70% ~ 70% respectively.

Six ways of working

The disorderly flow

Air by air conditioning box through a duct and clean indoor air filter (HEPA) into the clean room, and clean room on both sides of the partition wall plate or elevated floor return air. Non linear movement and irregular airflow turbulence or eddy current state. This form is applicable to clean room 1000 - level of 1000.

Definition: uneven airflow to speed parallel flow, accompanied by reflux or vortex flow clean room.

Features: turbulence clean room is accomplished by many times of air clean and clean level. Purification of air changes to define level (the more ventilation rate, the higher the level of purification)

(1) the net time: refers to the clean room air changes according to the design began to supply air into the clean room, indoor dust concentration reaches the designed purification level of time. Hope no more than 20 min (minutes) level 1000 (15 min) desirable level 10000 hope no more than 30 min (minutes) (25 min) desirable level 100000 hope no more than 40 min (minutes) (preferable 30 min)

2 air changes (design) according to the requirements of the self-purification time level 1000 43.5 55.3 times per hour (specification: 50 times per hour) level 10000 23.8 28.6 times per hour (specification: 25 times/h) level 100000 14.4 19.2 times per hour (specification: 15 times/h)

Advantages: simple construction, system construction costs, the extension of clean room easier, in some places of special use, can use clean workbench, improve the level of clean room.

Weakness: the turbulence caused by the dust particles floating in the interior space is not easy to discharge, easy pollution process products. In addition if the system stops running reactivation, demand for cleanliness, often must take a long time.

Layer flow

Layer flow air flow movement into a uniform rectilinear, air filter by the coverage rate of 100% enter indoor, and the elevated floor or on both sides of the partition panel return, this type is applicable to clean room need to be used the environment of high grade, generally their level of clean room for Class 1 ~ 100. The pattern can be divided into two categories:

(1) horizontal layer flow: blow out the horizontal air filter single direction, from the side wall of the return air return air system, dust in the wind to eduction outdoor, generally on the low side pollution more serious.

Advantages: simple structure, operation can become stable after a short time.

Weakness: the construction cost is higher than disorderly flow, interior space is not easy to expand.

Layer 2 vertical flow: the room ceiling entirely in ULPA filter cover, air to blow by, can get higher cleanliness, or staff in the process of dust can be emitted quickly and will not affect other work areas.

Advantages: easy management, start running in a short period of time can reach a steady state, not easily influenced by what job status or workers.

Disadvantages: high cost of structure, flexible use of space is difficult, the ceiling of the hanger is occupy a space, more trouble maintenance to replace the filter.

compound

Compound for will be a composite or disorderly flow and layer flow and use, can provide local super clean air.

(the Clean Tunnel) : (1) Clean Tunnel with HEPA and ULPA filter to process area or working area cover to improve cleanliness levels by 100% to more than 10, installation operation cost can be saved.

This type of homework personnel must be quarantined on the workspace with the product and machine maintenance, to avoid affect the work and the quality when machine maintenance, ULSI process mostly adopt this model.

Clean tunnel and two advantages: a. elastic expansion; B. when maintenance equipment can be performed easily in the pit.

2 Clean pipeline (the Clean Tube) : the product flow through the automatic production line of surrounds and purification treatment, the cleanliness level to level is above 100. Due to the product and the operators and dust environment mutual isolation, a small amount of supply air can get good cleanliness, can save energy, do not need artificial automatic production lines for the most appropriate use. Fit for pharmaceuticals, food industry and semiconductor industry.

(3) and local Clean room (Clean Spot) : the Clean room level of 10000 ~ 100000 turbulence Clean indoor product process area cleanliness level for more than 10 ~ 1000 grade, thought of production; Clean bench, clean work shed, which includes clean wind cabinet.

Clean bench: Class 1 ~ level of 100.

Clean work shed: for in the disorderly flow of clean room space in case of electrostatic transparent plastic round into a small space, the independence of the HEPA and ULPA or air conditioning air supply unit and a higher level of clean room, the level of 10 ~ 1000, height 2.5 meters, under the covering area of about 10 m2, with four pillars and wheel equipped with activity, can be use for the elastic.

7 wind speed control

Clean indoor air is one of the important factors about the cleanroom performance, general clean room air flow speed is between 0.25 ~ 0.5 m/s, the area of air velocity is a breeze, vulnerable people, such as the machine movement and interference becomes chaotic, is improve the wind speed can suppress the effects of the disturbing and maintain cleanliness, but due to the increase of wind speed will affect the increase of operating costs, so should be meet the requirements of the level of cleanliness, to be able to supply the most suitable wind speed, in order to achieve the appropriate wind supply in order to achieve economic effect.

On the other hand to achieve the stable effect of clean room cleanliness, uniform flow of keep also is an important factor, if unable to maintain uniform air, said wind speed is different, especially in the wall, air flow would occur along the wall eddy current effect, it's difficult to achieve high cleanliness in fact at this time.

Vertical layer flow direction to maintain uniform air flow must blow to wind speed: (a) do not have the difference in speed; (b) the floor return air plate of the suction surface wind speed do not have the difference in speed. Speed is too low or too high (0.2 m/s, 0.7 m/s) all has the phenomenon of eddy current, and the speed of 0.5 m/s, is relatively uniform, generally clean room, the wind speed are between 0.25 ~ 0.5 m/s.

Eight factors influencing

There are many factors affect the clean room air flow, such as process equipment, personnel, clean room assembly materials, lighting equipment, etc., at the same time for the production equipment of air above the split points, should also be included in the consideration.

General work station or on the surface of the production equipment such as air flow distribution points, should be in clean room space and two-thirds of clapboard spacing, so can make the workers work, working in the air can flow from inside the process area, and the dust away; If diversion point configuration in the process zone ahead, will become the improper air bypass, when most of the air flow to process area, operators will be brought to the equipment operation caused by the dust, the workbench and therefore will be subject to pollution, yield is reduced.

Clean indoor obstacles such as work tables, in place will have the eddy current phenomenon occurs, relatively poor in the vicinity of cleanliness will, return air hole on work desktop drill, will make the eddy current phenomenon reduced minimum; Assemble the proper choice of materials, equipment layout is perfect, also for the air flow is become the important factor of eddy current phenomenon.

Composition of clean room is composed of the following systems (molecules are composed of system is necessary), otherwise will not be able to constitute a complete and good quality of clean room:

(1) the Ceiling system: including the derrick (between), steel Beam (I - Beam or U - Beam), the Ceiling grid Beam (between the grid or Ceilingframe).

2 air conditioning system: including air tank, filter system, windmills, etc.

(3) partition board (Partitional wall) : including Windows, doors.

(4) the floor: including elevated floor or anti-static shu floor.

5] lighting fixtures, including fluorescent lamp, yellow tubes, etc.

Clean room construction of the main body structure, usually with steel or bone cement, but whatever the construct, must meet the following conditions:

Low not occurred cracks due to temperature change and vibration;

Is not easy to produce tiny particles of dust, and it is difficult to attached particles;

Low moisture absorption small;

In order to maintain indoor humidity conditions, thermal insulation.

Importance of 9

Clean room cleanliness is often affected by air, in other words, namely, person, machine compartment, such as building structure of dust produced by mobile, diffusion are at the mercy of the airflow.

Clean room system use HEPA and ULPA filter the air, the dust collection rate was more than 99.97 ~ 99.99995%, so the air can be said of the filter is very clean. Clean indoor in addition to people, however, there are machines such as hair dust source, once the occurrence of dust diffusion, namely cannot clean space, so we must use air dust emitted quickly will occur.

10 applications

industrial

In order to inanimate particle control for the object. Main control air dust particle pollution to the work object, generally remain positive pressure inside. It is suitable for precision machinery industry, electronic industry, semiconductor, integrated circuit, etc.) the aerospace industry, high purity magnetic products, atomic energy industry, chemical industry, light industry (CD, tape, film production), LCD (liquid crystal glass), computer hard drives, magnetic head production and other industries.

biological

Main control life particles (bacteria) and abiotic particles of pollution (dust) to the work object. And can be divided into:

A, general biological clean room: the main pollution control microorganism (bacteria) objects. At the same time its internal materials need to be able to withstand various sterilization agent erosion, internal general guarantee positive pressure. Essentially to its internal material can endure all kinds of sterilization processing industrial clean room. Example: the pharmaceutical industry, hospital (operating room, sterile ward) food, cosmetics, beverage production, animal laboratory, the physical and chemical inspection room, blood stations, etc.

B, biology safety clean room: main control object of a particulate pollution to the outside world and human life. Internal to maintain and negative pressure of the atmosphere. Example: bacteriology, biology, clean laboratory, engineering (recombinant gene vaccine).

The relevant knowledge

11 work

Send dust

Clean indoor dust, can consider through local exhaust exclude from devices, not into the interior; Hair products and materials in the process of transporting dust compared with human hair dust quantity, generally small, negligible. Due to the application of metal is used (caigang sandwich panels) from hair dust on the surface of the building also rarely, generally accounts for less than 10%, dust mainly comes from people, accounting for about 90%. In the hair on the amount of dust, due to the style of clothing material and improvement, sending absolute quantity of dust is reduced.

A, material: cotton dust quantity biggest, followed by cotton to electrostatic polyester, nylon, dacron,.

B, style: big hanging dust quantity, packing type times up and down, all type cover at least.

C, activity: activity of dust generally up to rest time 3 to 7 times.

D, cleaning: solvent washing hair dust fell to use one 5 of the general water to clean.

Indoor maintenance structure surface dust, will be subject to the ground, about 8 square meters of the ground surface corresponding to send dust and the hair of a static dust quantity.

Microbial hair

Pollution from staff:

1) skin: humans usually once every four days to complete the skin completely change, human skin off about 1000 pieces per minute (average size is 30 * 60 * 3 microns)

(2) hair: human hair diameter of about 50 to 100 microns) has been fall off.

3) the saliva: including, enzyme, salt, potassium, sodium chloride and food particles.

4) daily clothing: particles, fibers, silica, cellulose, all kinds of chemicals and bacteria.

5) human stationary and sit will produce 10000 per minute is greater than 0.3 micron particles.

6) in human head and torso do actions will produce 1000000 per minute when greater than 0.3 micron particles.

7) humans walking at a speed of 0.9 m/s will produce 5000000 per minute is greater than 0.3 micron particles.

Analysis of foreign test data can be thought of:

(1) clean indoor when workers wear sterile clothing:

Resting of the bacteria amount is usually 10-300 / min. People

Microbial hair of the body during normal activities of 150-1000 / min. The people

Microbial hair of the brisk walking for 900-2500 / min. People

2 cough a general for 70 ~ 700 / min. People

Sneezing a general for 4000 ~ 62000 / min. People

(3) microbial wear ordinary clothes to send the 3300 ~ 62000 / min. People

(4) no mask hair bacteria amount: with masks 1:7 ~ 1:14 bacteria quantity

5] hair amount of bacteria: hair dust 1:500 ~ the latter according to the domestic example:

Microbial [6] in the operation personnel to send 878 / min

So, clear clean indoor microbial static hair of the sterile gown personnel generally not more than 300 / min., dynamic hair bacterium quantity is generally not more than 1000 / min/person, as a calculation basis is feasible.

12 standards

Standard.

(1). Clean workshop design specification GB50073-2001

2. The hospital clean operating department construction technical specification GB50333-2002

(3). Pharmaceutical industry clean workshop design standard GB 50457-2008

(4). Infectious disease hospital architecture design specification

5]. Pharmaceutical industry clean room (area) of suspended particles to GB/T16292-1996 test method

[6]. QS certification of the quality manual

Once. GMP pharmaceutical production quality management norms

Being. Clean room construction and acceptance standard GB 5091-2010

The international standard

The ISO series

(1) ISO14644-1 air cleanliness hierarchies

2 ISO14644 ISO14644-1-2 for certification consistent of continuous testing and monitoring technical requirements

(3) ISO14644-3 test methods

(4) ISO14644-4 design build start

5] ISO14644-5 run (Operations)

[6] ISO14644-6 terms and definitions

Once ISO14644-7 separation device (clean air cap, glove box, separator and microcirculation equipment

Being ISO14644-8 molecular contamination

'levies ISO14644-9 clean chemicals (liquid)

IEST series

Clean air:

The RP - CC001 high and ultra high efficiency filter

The RP - CC002 uniflow device

RP - CC006 cleanroom testing RP - CC007 ultra high efficiency filter test

The RP - CC008 gas absorption device

RP - CC021 efficient and highly efficient filters filter medium test

RP - CC034 efficient and highly efficient filters filter leak detection

Clean room and clean environment:

The RP - CC006 cleanroom testing

The RP - CC012 clean room design points

The RP - CC016 cleanroom non-volatile residue deposition rate

The RP - CC018 clean room management operation and test procedures

The RP - CC022 clean room and electrostatic in a controlled environment

The RP - CC023 microbes in clean room

The RP - CC024 microelectronics equipment vibration measuring and instructions

The RP - CC026 clean room operation

The RP - CC027 clean room and in a controlled environment and behavior

Special applications:

The RP - CC029 use paint sprayer pollution control factors to consider

Run security:

The RP - CC003 clean room with the clothing system point of controlled environment

RP - CC004 clean room and controlled environment with cloth material evaluation

RP - CC005 clean room and controlled environment with gloves and refers to the set

The RP - CC020 cleanroom file material and format

Equipment:

The RP - CC002 uniflow device

The RP - CC013 equipment calibration and inspection procedures

The RP - CC015 clean room equipment and auxiliary equipment

Terms:

The RP - terms and definitions CC011 pollution control field

Documents:

In the field of RP - CC009 pollution control standards, guidelines, methods and related document overview

Detailed parameters

Clean standard and clean level ISO (international standards)

The particle size of file maximum permissible particle concentration (/ m3)

ISO grade 0.1 0.2 um um 0.2 um

1 October 2

2 100 24 10 4

3 to 1,

4, 10000, 2370, 1020, 32, 83

May 10, 100000, 23700,

6, 1000000, 237000, 102

Clean air should be stipulated in the following table is divided into four levels.

Air cleanliness level table

level

Per cubic meter (per liter) in the air

Acuity 0.5 micron dust grains

Per cubic meter (per liter) in the air

Number 5 microns or dust particles

The class of 100

35 x 100 or less (3.5)

The class of 1000

35 x 1000 or less (35)

2500 (0.25) or less

The class of 10000

35 x 10000 or less (350).

25000 (2.5) or less

The class of 100000

35 x 100000 or less (3500).

25000 (25) or less

Note: the class of 100 clean indoor air cleanliness for dust is greater than or equal to 5 microns calculation should be repeated sampling. When the multiple occurrences, may think that the test value is *.

13 application scope

Purification engineering is a basic industry is very widely used supporting industries, in the electronic information, semiconductor, optoelectronics, precision manufacturing, medicine and health care, biological engineering, aerospace, automotive coating are applied in many industries, and according to the requirements of the industry precision and dust-free, level difference is bigger also.

Current level most of aviation aerospace storehouse, basic it is to belong to grade 1, belong to a special field, the area is relatively small.

In addition to biochemistry laboratory is required high level and high precision nanomaterials production workshop, the development of the Internet chips will be a direction of future demand.

14 the eight characteristics

The first point, the principle is more suitable for the cleanroom arc Angle;

The second point, the system automatic control operation, two-door electronic interlock, and is equipped with photoelectric sensors, air shower, a one-way passage from the clean area in, shut the door after infrared induction was blowing rain, introductory locking after blowing rain, only from out of the air shower outdoors;

The third point, the overall cold-rolled steel plate production, the surface electrostatic pensu processing,

Fourth, door, floor, nozzle adopt stainless steel, beautiful and easy;

Fifth, touch soft key press type time relay, LED display and set the leaching time, adjustable range between 10-99 - s, two-door automatic locking when blowing tube;

At the beginning of the sixth, USES the, efficient two stage filtration system, has a hepa filter, filtration efficiency is 99.99%, ensure purification level;

First at seven o 'clock, the wind outlet wind speed up to 25 m/s above, to the human body more than 18 m/s wind speed;

First at eight o 'clock, use EVA sealing materials, sealed performance is high.

15 personnel specification

In order to avoid and reduce the clean room staff cause pollution to the clean room. Any clean room outside of work personnel in contact with the clean room staff jetstar when talking to his back to the past, because of the nose and mouth will send out to watch the hing pollution.

Do nose not workspace of the clean room.

If there is a cough or sneeze, workspace to do back to clean room covered with gloves, gloves and timely replacement. In severe cases, should immediately leave the clean room area, and report to the leadership.

Clean indoor items shall not be placed in the clean room work. Clean room work items to discharge in order.

When the device will not operate properly, don't to repair, to report to the leadership, and other professional personnel for clean room for repair.

In addition, since the clean room cleanliness has a high requirement. Therefore, the body of clean room staff requirement is very strict.

People with respiratory disease, caused by for clean room air pollution, so it can't work into the clean room

Suffer from conjunctivitis or other symptoms of secretions, or those suffering from skin diseases are not suitable for work in the clean room.

Also need to be aware of, clean room staff to their oral health, keep attention. Clean room staff regularly for physical health examination

16 operation and energy saving

Low should be between clean room air distribution, ventilation, air switch, such as production stop, ventilation cabinet also should stop or reduce the air volume, fresh air should be down.

Low technology is not absolutely required on duty to the protection of the fan operation, should be adopted in advance on the net.

Low clean room fan speed pressure head can be controlled, don't always in the air volume of the maximum pressure head or running condition.

Low operation should maximize the use of outdoor air cooling, and increase the fresh air than at this time.

Clean room should according to the outdoor weather conditions change, through the automatic or manual which can adjust output.

Reduce the size of our clean room, such as clean tunnel or tunnel clean room, according to the production requirements put clean space is divided into different levels of cleanliness technology area, operating area, pit and channel area.