【 Weak current College 】 air conditioning copper parts antibacterial answers---Power By 【 China power house network 】

Because some parts of the air conditioning system at run time, and often generating condensation to microbial reproduction. According to the international copper industry association and related public health departments on the actual use of room air conditioner onsite health survey, bacteria, mold and mildew in air conditioning systems are present in varying degrees, growth, central air conditioning Terminal, split wall hanging machine and air conditioning split cupboard, still checking out a large number of bacteria, including Staphylococcus aureus, Bacillus and Legionella, etc, to the indoor environment of secondary pollution.

Of these, Staphylococcus aureus for the middle of Staphylococcus aureus bacteria can cause infection and inflammation, the air conditioning system of Staphylococcus aureus in the level of average checkout at 10%, should arouse attention. Bacillus is opportunistic bacteria, detection rate is extremely high, reaching 88% or more. Legionella in fan-coil in the detection rate of 1.72% (1/58), and in the checkout of the air-conditioner 9.38% (3/67), Legionella causes Legionnaires Disease, it is a type of pneumonia.

The main component of room air conditioner for fans, heat exchangers, filters and condensate tray, etc. Energy exchange in summer, the indoor heat exchanger surface temperature is usually 5-20 ° c, optimal for the multiplication of bacteria; the temperature area plus the condensation water caused by damp micro environment, constitutes the ideal place for microbial growth. Therefore, filters, heat exchanger and condenser water up into a living room of filth, resulting in indoor secondary pollution, and threats to human health. At the same time, the microbiological hazards, the indoor air with outdoor air with greater risk.

Antibacterial typically have the following meanings: (1) to the living environment of bacteria for the object, the effect lasting several years and even decades; (2) sterilization capacity below the usual sterilization, static strain level; (3) to maintain the health of life-environment. According to the composition of antibacterial agents can be divided into natural, organic and inorganic three types. Copper is excellent inorganic antimicrobial, atomic weight 63.54, specific gravity 8.92.

The main mechanism of copper antibacterial: (1) contact reaction, i.e. antibacterial products in contact with copper ions and bacteria, causing microorganism reactions inherent component failure or dysfunction. (2) a photocatalytic reaction, in light of the role, the copper ions can play a catalytic activity centre activated water and oxygen to produce hydroxyl radical (.0H) and active oxygen ions (O-2), short time damage bacteria proliferation and cell death, so as to achieve antibacterial.

Copper ions have fungistatic action, in a public place is unique with bronze structure prevents the spread of germs. From environmental health perspectives, the copper foil is air-conditioning heat exchanger fin-use best antibacterial material; it is also recommended that the stagnant water and filter it using copper or copper plating.

Air conditioning system without copper, at present, "household and similar electrical appliances General requirements for disinfection of the relevant national standards have entered into consultation phase. In recent years, people on the air conditioning system of microorganism breeding conditions for the further reflection on, in order to prevent the microbes spread through the air conditioning system, strengthening public health management of the air conditioning system, air-conditioning system filters, cooling coils, heating (wet), condensation water plate etc use antibacterial material or surface antibacterial processing and use of antibacterial material durability of antibacterial properties and corresponding air conditioning system part of the active life.

Antimicrobial for copper, Japan has developed air conditioning copper filter cotton and other type of filter material. New copper copper fin heat exchanger related antimicrobial properties and excellent heat transfer performance in research. For example, according to the international copper industry association and Shanghai Jiaotong University jointly on room air conditioner with heat exchanger for heat transfer performance computer simulation analysis show that when used to replace copper fins, aluminum finned heat exchangers increased heat transfer coefficient; when fin thickness is smaller, the more fins height, air side, the greater the heat transfer coefficient, the entire copper heat exchanger relative to the copper pipe aluminium heat exchanger for heat transfer enhancement effects. Typical operating conditions, when fin thickness is 0.1mm, fin height 15.0mm, refrigerant heat transfer coefficient 4000W/m2/K, air side heat transfer coefficient for 80W/m2/K, fin spacing as 1.6mm, the total heat transfer coefficient for enhanced 9.88 relative percentage. In the test conditions, when fin thickness is 0.02mm, fin height 30.0mm, refrigerant side heat transfer coefficient to 5000W/m2/K, air side heat transfer coefficient for 60W/m2/K, fin spacing as 1.6mm, the total heat transfer coefficient for enhanced relative percentage of 23.276%.

Prospect prospect, the air conditioning system with heat exchanger fins, filters and condensate tray, to be reasonable with the antibacterial effect of copper, when can contribute to protecting people's health.