Technology support
2019-10-30




Electrostatic Air Cleaners

Advantages

Disadvantages/Solutions

An electrostatic precipitating (ESP 

or Plasmas) air cleaner is usually 

composed of two sections, 

a charging section and a collection section. 

The charging section uses high-voltage wires 

to impart a positive charge to the incoming pollutant particles. 

The charged particles are then drawn into a secondary electric field, 

where they are collected on a series of metal plates 

carrying the opposite charge. Clean air is then 

re-circulated back into the general air stream. 

It can capture particles in a range of 0.01 micron 

to 1 micron. Some advanced types add 

in a fan to enhance the draw-in efficiency.


Quite effective, removing about 95 percent of 

bulk dirt and 85% percent of microscopic particles 

(small to 0.01 microns), 

and especially effective for gaseous 

particles.High-energy efficiency: 

most of them consume the electricity 

under 20 watts.No costly filters to replace: 

the collection plates can be washed or wiped down.


The main disadvantage of this type of 

unit is its high cost due to the sophisticated 

manufacturing technology.

One side effect should be concerned is that it 

may produce ozone as a byproduct of use, 

but it is none harm if the ozone emission is 

well controlled under safety level.


HEPA Air Filtration

AdvantagesDisadvantages/Solutions

HEPA, which stands for High Efficiency 

Particulate Accumulation, is a highly 

effective filter originally designed for removing 

radioactive particles from air. HEPA air filters 

are made from very tiny glass fibers that are made 

into a tightly woven paper. This creates a filter 

consisting of a multitude of very small sieves 

that can capture extremely small particles, including 

some biological agents. Once trapped, contaminates 

and particles are not able to flow back into circulation, 

due to the highly absorbent pores of the HEPA air filter.

Effective at removing airborne solid and liquid particulate 

(small to 0.03 microns) with up to 97.7% efficiency.

High replacement cost is a real disadvantage 

to HEPA filters cannot be washed due to being too 

easily damaged, they must be replaced periodically 

depending on use, and typically cost very expensive. 

Because of so dense, they require a strong 

blower to move air through, racking up higher 

energy costs.And they only remove odors 

trapped in the filter as it passes through the unit.

Negative Ionizers

Advantages

Disadvantages/Solutions

Most Negative ionizers use tiny, 

charged wires or needles to create ions 

(gas molecules with a negative charge) that latch 

onto airborne particles. The negative ions cause 

microscopic particles (particulates) floating in a room, 

that cause some people to have allergic reactions, 

to clump together and fall to the floor (or other surfaces) 

where they can be vacuumed up. This is due to an 

electrostatic charge between the negative ions and 

other air molecules and particles in the air.

Removes finer particles than HEPA filters or 

any other type of air purifier available. A fan-type 

air filter can only filter the air drawn through it, 

whereas negative ions disperse throughout the 

room causing particles to drop out of the air.

Well known as it a min A in the air purifier, 

they also have been shown to help lift mood, 

alleviate depression and seasonal affective disorder.

Many ionizers build up a coating of dirt inside 

that makes them stop working after a relatively 

short period of time.

An effective solution for this problem is to add in 

fan before the ionizer wires or needles to 

blow off the dirt while disperse the negative ions 

more evenly throughout the room.

Ozone Purification

AdvantagesDisadvantages/Solutions

Ozonizer produces ozone by making oxidation. 

When a molecule of oxygen, O2, is bound via 

oxidation to a third oxygen atom, it becomes Ozone, 

or O3, which is an unstable bluish water-soluble 

gas with a very characteristic scent that is easy to recognize.

With very unstable characteristic, ozone has a strong 

oxidation, so is widely used in our daily life for deodorization, 

detoxification, sterilization, maintaining freshness, and bleaching.

Studies shown that ozone

is safe and effective if used properly for: 
1. Neutralizing stale and foul odors.
3. Avoiding the growth of fleas and mildew.
4. Killing all kinds of bacteria.
5. Decomposing the poison residual in vegetables and fruits.
6. Maintaining the frozen food fresh.
7. Decomposing toxic gases quickly.
8. Decolorizing water.


Used in indoor air purification, ozone is safe when 

occurring within FDA standards at a concentration 

of 0.05 ppm (parts per million). However, with such a 

low concentration in the air, it doesn’t show apparently 

effective in killing bacteria even deodorizing. So it isn’t 

recommended that air purifiers use ozone for indoor 

air purification.But there is a different story when

ozonizers generate ozone at certain level to effectively 

eliminate odors or kill bacteria inside a closed space 

without human beings or living animals in, such as 

refrigerators, food storage containers, wardrobes and so on.

UV Air Cleaners

AdvantagesDisadvantages/Solutions

UV light air purification products are basically 

specialized light bulbs that produce UVC light. 

UV light is a well-known and effective killer of 

biological organisms, and breaks down many 

organic gases into their harmless components.

Ultraviolet lights have been demonstrated to 

be an effective control measure for controlling 

disease germs for which such control is necessary, 

like medical care facilities. The use of UV light as 

an air-cleaning tool in such environments is 

both justified and desirable.

The problem with UV light is the same damage 

of the destruction of the microorganisms has a 

chance to occur to humans skin and eyes. 

Some UV air purifiers without shielding 

direct ultraviolet light from escaping the inside of 

the unit lay down a potential danger to hurt 

the skins and eyes of the users.

Active carbon

AdvantagesDisadvantages/Solutions

Super absorbing and removing smells ability

The active carbon super absorbing and 

removing smells ability: Efficient active carbon 

net sponge is just like the sea alga will instantly 

remove the smoke in the room, formaldehyde,

ammonia, carbon monoxide etc, In the meanwhile, 

will absorb the dusts.


No side effects of active carbon have been found.

Photocatalyst Oxidization

AdvantagesDisadvantages/Solutions

Photocatalyst (TiO2) is a semiconductor that 

has strong oxidation. Shining of light source can 

stir up oxidation-reduction reaction on its surface, 

and the surface will release free radicals, at the 

moment, chain degradation reaction occurs 

between the free radicals and kinds of contaminant 

and bacteria each other. And the reaction can realize 

the functions of air purification, anti-bacteria, 

anti-dirtiness and deodorization, hydrophilic 

nature, and so on.

Utilized in air purification, it can efficiently 

decompose and eliminate many kinds of 

organic and inorganic materials and gases 

in the air.Coated on nickel foam filter, 

it is efficient for long consumed without 

declining with the time, and very convenient 

for maintenance--the TiO2 nickel foam filter 

can be washed without any destruction of its efficiency.

No side effects of photocatalyst have been found.

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