The deficiencies in the existing technology are: the limitation of thermal sterilization is large; the filter material of the filter will be blocked by dirt soon and become invalid when it is used, the pathogens blocked by the filter material will not be killed, and the cost of replacing the filter material is high , prone to secondary pollution; electrostatic sterilization is to make floating dust and microorganisms deposit on the plate after being charged in a high-voltage electric field. Poor durability; ultraviolet light and photocatalysis are only low-efficiency disinfection methods, which require a relatively short distance and a long time to sterilize, and cannot reliably disinfect the air
It was originally to solve the problem of large air intake resistance of the dry filter, but adding liquid to the coarse filter, the absorbent cotton in it will absorb water and expand, and the fine filter is equipped with multi-layer sieve plates and filter mesh membranes, and is soaked in acid, alkali or salt In such disinfection solutions, the air intake resistance is still very large, especially the dust will quickly block the filter material and mix with the solution to make the filter invalid; secondly, it is not economical to list magnesium chloride, mercuric chloride and sodium hydroxide as disinfectants , appropriate and prone to air recontamination by disinfectant, and it is difficult to have a filter that can also be used in caustic soda solution
Also on February 28, 1996, "A kind of washing type air freshener using ozone water", publication number 2221173, atomizes the aqueous solution of ozone into the air that the water curtain leaching flows through, and its main deficiency is that this rinsing air The method makes the contact between air and water limited, and the purification efficiency is low
The "water filter type air purification energy-saving device" announced on October 3, 2001, the announcement number CN1072026C, is to purify the air through the porous water seepage filter pipe; the "water filter type air filter" announced on May 22, 1996 "Air purifier", announcement number CN2227518Y, using the motor blades in the barrel to set off a water curtain to wash the air; "water bath air cleaner", announcement number CN2344691Y, announced on October 20, 1999, spraying water with a nozzle in the barrel Air; another "water-soluble air purifier" announced on January 16, 2002, the announcement number CN2471396Y, uses an air pump to pump air into the water bucket, and the motor drives the blades to rotate and smash the floating air bubbles to wash the air, and the air is washed in the water. A magnetic block is provided to magnetize water, etc.; the common deficiency of the above-mentioned technologies is that the oily floating dust in the air and the oily dust contained in the air used have no or poor affinity for bacteria and aerosols, and at the interface between air and water, due to water Due to the surface tension and air buoyancy, the contact between gas and water is insufficient, especially the short time between gas and water, resulting in poor washing effect, low purification efficiency, and lack of safe or proper sterilization measures.
In a densely populated environment, the source of infection continuously emits tens of thousands of pathogens into the air. The concentration of pathogens is often high, and the air is used as a carrier to spread with the air flow. Disinfection equipment, all of which inhale air into the equipment for disinfection, including built-in ultraviolet light and built-in ozone machine, can only gradually reduce the concentration of pathogens in the air, and cannot stop the source of infection from continuously emitting pathogens into the air and spreading to the surrounding area, especially The air passes through the equipment very quickly, and the effective sterilization time is too short, which makes the disinfection effect unsatisfactory; air purification is one of the components of the air conditioning unit, and due to the technical status quo in the field of air disinfection, the hygiene level in the air conditioning field is low, and it is easy to cause airborne infection. The transmission of infectious diseases through air conditioners has attracted the attention of the health department in our country; due to many defects and deficiencies in the existing technology, it has not been seen that it can efficiently, reliably and conveniently purify and disinfect air and block the passage of pathogens in a densely populated and mobile indoor environment. Airborne Devices