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Application of air filters in various occasions

Views: 0 Author: Site Editor Publish Time: 2022-02-24 Origin: Site

Junior high-efficiency air filterRefers to the air filtration device, generally used in clean workshops, cleansing plants, laboratory and clean rooms, or for dustproof for electronic mechanical communication equipment. There is an initial filter, a medium-role filter, an efficient filter and a sub-efficacy model. Various models have different standards and performance.

◆ Rationalize filter efficiency at all levels

In general, the last level filter determines the degree of air purification, and the upstream level filters mainly protect, protect the lower airborne filter to extend its service life, or protect the air conditioning system to ensure its normal operation.

In the air conditioning design, you should first determine the efficiency of the last level filter according to the user's cleanup requirements, then select the protective filter, if this level filter needs to be protected, it is necessary to add a filter in its upper wind. Protect the filter collective \"pre-filter \".

The efficiency of each of the filters should be properly matched. If the efficiency specification of the neighbor two-stage filter is too large, the previous stage does not reach the role of the post-protected level; if the two levels are not large, the post-level burden is too small.

The ultimate life of the high-efficiency filter of the clean room is long, the most important factor affecting the service life is the pros and cons of the pre-filter.

When using \"g ~ f ~ h ~ u \" efficiency specification classification, it is convenient to estimate the efficiency of the filter required. In G2 ~ H12, a first-level filter is set every 2 to 4. For example: G4 → F7 → H10, where the end H10 (sub-efficient) filter determines the cleaning level of the air supply, the F7 protection H10, G4 protects F7. Clean chamber end high efficiency (HEPA) filter should be protected by a filter that is not less than f8 before the filter; the F9 ~ H11 filter can be used before the ultra-efficient (ULPA) filter. The central air conditioner itself should be protected by a filter that is not less than F5.

In the windless, low-contaminated area, the F7 filter can not be provided before the F7 filter; in the urban central air conditioning system, G3 ~ F6 is a common primary filter.

What is the efficiency level pre-filter to protect the post-first level filter, which requires designers and field engineers to use environmental, spare parts, operating energy consumption, maintenance costs and other factors and other factors.

◆ Selection reference for typical venue filters

Use place	Main filter efficiency	Common filter element	special requirements	illustrate
Main filter in ordinary central air conditioner	F5 ~ F7	Bag, no block filter	Reasonable filtration efficiency	Hygiene, protect the interior decoration, protect air conditioning system
Pre-filter in ordinary central air conditioners	G3 ~ F5	Various cheap and easy to use filters	High capacity capacity, supply is guaranteed	Protect air conditioning systems to protect the next level filter
High-speed public place central air conditioning	F7	Bag, no block filter	－	Prevent air inlet black stains, prevent indoor decoration
Airport Terminal	F7	Bag, no block filter	－	Passengers first impression
School, kindergarten	F7	Bag, no block filter	Fire prevention	Special safety consideration
Clinic and ward	F7 ~ F8	Bag, no block filter	－	Prevent cross-infection
Museum, library	F7	Bag, no block filter	－	Protect treasure
Audiovisual studio	F7	Bag, no block filter	－	Protect optical equipment and products
100,000 level, 10,000-level non-uniform flow clean room	Hepa	Have a separator, no block high-efficiency filter	Place-by-step test, no flammable material	Filter is installed in an efficient air supply
Level 100 clean room	Hepa ULPA	Have a separator, no block high-efficiency filter	After leaving the factory, after blocking inspection	Clean room end
General cleansing room pre-filtered	F8 ~ h10	Bag, no block, a partition filter	－	Ensure the normal service life of the end filter
Chip Factory 10, 1 clean factory	ULPA	No barrier ULPA filter	Scanning test, uniform flow rate, no volatile	Today's filter for filter performance requirements
Chip factory 10, level 1 clean factory pre-filter	Hepa	No separator, partition filter	High wind speed	Ensure the service life of the end filter is \"a lifetime \"
Pharmaceutical industry 300,000 level clean factory	F8 ~ h10 Hepa	Bag, no block, a partition filter	Filter does not contain nutrients	Terminal filter can be located in the central air conditioner
Negative cleansing room exhaust filter	Hepa	No separator, partition filter	reliable	Prohibition of dangerous goods emissions
Car coated pipeline main filter	G4 ~ F7	Bag filter	No silicone, no hair, flame retardant	Meet the paint no defect, protect the current material
Car paint flow water line main filter	F6 ~ F7	High temperature resistant partition filter	Silicone	Process requirement
High requirements static spray production workshop	F7 ~ F8	Bag, no block filter	No silicone, no hair	Guarantee appearance
Nuclear power plant exhaust	Hepa	Have a separator, no barrier filter	Fire prevention, impact, specialized agency certification	-
Machine room, switch station, central control room with central air conditioning	F5 ~ F7	Bag, no block filter	-	Prevent heat dissipation due to dust and circuit failure
Cabinet air-conditioned machine room, switch station, central control room	G3 ~ F5	Easy flat plate filter	-	Because of the site restriction, the cabinet air conditioner is difficult to adopt other forms of filters
Chemical fiber drawing process	F8	Bag filter	-	Prevent broken wire
Spinning shop	G4 ~ F7	Bag filter, electrostatic filter	-	Prevent \"Coal Sums\"
food industry	F7	Bag, no block filter	No nutrient	Production environment
Clean workbench, wind shower room	Hepa	Have a separator, no block high-efficiency filter	-	-
Rolled steel main motor	F7	Bag filter	Flame retardant	Prevent motor failure caused by dust
Current air conditioner	F7	Self-cleaning filter, bag filter	-	Domestic tobacco industry currently pop self-cleaning filtering device
Home central air conditioner	G3 ~ G4	Flat filter	Cheap, beautiful	Premium
Ordinary household air conditioner		Nylon net filter	Can be cleaned	Blocking fiber and rough dust
Sand area pre-filtered	－	Inertial dust removing device, water bath dust removing device, roller blind filter	－	Clear large particle dust, work only when weird
Gas turbine with centrifugal air compressor	F7 ~ F8	No separator, bag type, partition filter, self-cleaning filter	Anti-shock, flame retardant	Prevent internal fouling, wear, corrosion
Axial air compressor	F5 ~ F7	No separator, bag filter	Anti-shock, flame retardant	Prevent blade wear
Reciprocal air compressor, internal combustion engine	G3 ~ F5	Bag filter, filter, flat filter	Anti-impact, overtield resistance	Prevent cylinder wear
High-level car air conditioner	F7	No barrier filter element	－	Dust, flour pollen
High-end household vacuum cleaner	F7 Hepa	No barrier filter element	Strong, resistant to water	Prevent drainous secondary pollution
Clean room vacuum cleaner	Hepa	No barrier filter element	Strong, resistant to water	Prevent drainous secondary pollution
Household air purifier	F7 ~ f9 Hepa	Cylindrical and square non-barrier filter elements	Cheap, beautiful	Premium
Gas mask	Hepa	No barrier filter element	Temperature, water resistant	Combination of activated carbon

Note: \"Main Filter \" refers to the filter, or a filter for the specified part

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