What does air conditioning and healthy wind mean?

With the increasing tightness and privacy of residential buildings, the decline of indoor air quality has become a problem. For this reason, in recent years, Japanese home appliance enterprises are gradually introducing various healthy air conditioners, which can not only adjust the temperature, but also exchange and clean indoor air, inhibit and kill various bacteria and viruses, so as to increase the health index of the room. It is understood that there is no formal industry standard for healthy air conditioners in Japan at present, and the scale of defining healthy air conditioners by home appliance manufacturers is not the same. But a similar view is that a healthy air conditioner should meet the following conditions: it can adjust indoor temperature and humidity; Natural ventilation and fresh air; Effectively inhibit and kill germs, viruses, etc. Adjusting indoor air temperature is the most basic function of air conditioning, and dehumidification and humidification are also one of the necessary conditions for healthy air conditioning. Because the indoor humidity is too high, it not only makes people feel uncomfortable, but also enhances the vitality of some bacteria and viruses and accelerates their reproductive ability. In order to maintain the appropriate indoor humidity, the commonly used dehumidification technology will lead to the decrease of room temperature, which can not maintain the stability of indoor temperature. To this end, Japanese air-conditioning manufacturers have developed a technology called "reheat dehumidification". This dehumidification technology only reduces the moisture in the air, but does not reduce the temperature of the air. The basic principle is that the air with reduced temperature in the dehumidification process is sent back to the room after being heated by the reheater, which can basically keep the indoor temperature stable. In winter, using ordinary air conditioners will greatly reduce the indoor humidity. The air is so dry that the residents feel uncomfortable. Under normal circumstances, when the relative humidity is lower than 20%, small wrinkles are easily generated on the skin, which affects the function of the throat mucosa. If the humidity drops further, it will also enhance the activity and reproduction speed of influenza virus. Therefore, excessive dryness is the "enemy" of skin and health. However, it turns out that air conditioners in Japan are humidified by humidifiers, which simply evaporate water and release it into the air. This method not only needs water tank and constant water addition, but also breeds germs and causes secondary pollution if the water tank is not cleaned frequently. Sharp Corporation and Toshiba Corporation of Japan have developed a natural humidification method without water. Sharp company adopts the principle of natural ventilation and humidifies by using the temperature difference between indoor and outdoor. The company's newly developed humidifying device uses a special hygroscopic material, which is used to make humidifying rods. When the exhausted air passes through the humidifying rod, the moisture is absorbed by the humidifying rod. When humidifying, a special precision ceramic heater is used to blow warm air to the humidifying rod, so that the moisture attached to the humidifying rod can be released and the indoor air humidity can be improved. Toshiba has adopted the technology of "special heat exchanger for condensation" to make the moisture in the air attached to the exchanger condense rather than freeze, and the blown wind contains a certain amount of moisture, just like natural wind, which will not make people feel uncomfortable. Natural ventilation is also one of the important standards of healthy air conditioning. A person will spit out 1 0 to 40 liters of carbonic acid gas within1hour, which will pollute indoor air. With the strengthening of building seal, it is more important to use machinery for forced ventilation. Japan's recently revised Building Standards Law stipulates that new buildings must be equipped with ventilation facilities that can rotate all indoor air for two hours. Therefore, Sharp has developed a technology that can ventilate very gently like natural wind. As long as you press the ventilation button on the remote control, the air conditioner can completely replace the indoor air within one hour. The air conditioner developed by Toshiba also has a strong ventilation ability, which can exhaust all the old indoor air and replace it with fresh air within 2 hours. At present, the air conditioners sold in Japan basically have ventilation function, which meets the national ventilation standards. It can purify the air and eliminate the dirty gas and peculiar smell in the air, which is another important standard of healthy air conditioning. Daqing Express Air-conditioner developed by Toshiba Company installed a sterilization plasma air purification device and a self-cleaning device inside the express air-conditioner. Plasma air purification device can not only absorb dust and pollen in the air, but also eliminate viruses in the air passing through the purification device. Hitachi has developed an air conditioner with an air purification filter. This air conditioning filter element has antibacterial and antiviral functions, which can eliminate 0.0 1 micron smoke. Daikin Company has developed an air conditioner that uses photocatalyst to purify the air. With titanium oxide as photocatalyst, a photocatalyst filter screen is produced, which has twice the dust collection and filtration capacity compared with the original air filter screen of the company, and has antibacterial and antiviral functions. Inhibition of mold propagation, killing indoor germs and viruses, with strong disinfection and sterilization functions, is the goal that Japanese air-conditioning enterprises have worked hard to achieve in recent years, and has become a hot topic of healthy air-conditioning in Japan. Among them, air conditioners produced by sterilization with positive and negative ion group technology are favored by consumers. The so-called "strong sterilization technology of positive and negative ion groups" is to decompose water molecules into positive and negative ions through high-voltage discharge of ion generators. Because water molecules are wrapped by moisture, forming positive and negative ion groups, and then floating around in the air with water molecules as carriers, the sterilization ability is very strong. The air conditioner using this technology can inactivate influenza virus and inhibit the reproduction of Escherichia coli and black bacteria. The air conditioner with positive and negative ion group technology can keep the indoor air clean for a long time. Recently, the research results of molecular life function science research group of graduate school of Hiroshima University in Japan show that positive and negative ion group technology can also inactivate "planktonic mite allergen". And "planktonic mite allergen" is the main cause of allergic dermatitis of asthma.