The introduced way of the fresh air
The direct introduction of the untreated new wind indoor Indoor fresh air directly introduce the blower into the chamber, the exhaust gas through the doors and windows of the gap or exhaust fan discharge chamber, which is simple, easy to control, during the transition period can also be ventilated. But the untreated new wind will cause the Enthusiasm of indoor temperature, temperature fluctuations, poor comfort, the new wind load is borne by the commercial air conditioning, caused by high relative humidity of the air-conditioned room, especially easy to produce condensed water outlet in the room. Can see this new wind practice in some air-conditioned spaces, the main reason for this phenomenon is caused by non-professional personnel design and installation design, installation, such as certain manufacturers or decoration companies to bid for engineering design and installation, I do not know ignorance often used to save money, an unwise move, but professional designers will not commit this error.
The fresh air flows into the room after processing
New air duct outside air into air conditioners, and mixed with return air into the room and treated, the indoor unit can be floor-to-ceiling cabinet, also available ceiling duct or ceiling cassettes. This is a common way of new wind, the method is simple, guaranteed fresh air, but the air conditioner is ordinary type, processing enthalpy difference is small, and designed indoor return air conditions is limited ability to deal with the new wind. For commercial air conditioning refrigerant direct evaporation system in terms of the proportion of the fresh air of the air conditioner indoor unit is best not to exceed 15%, otherwise it will create indoor supply air temperature cannot meet the design requirements, the normal operation of the system and the of adverse air conditioning refrigerant.
www.airconditionings.cn has also constructed four state-level product performance- testing centers for packaged air conditioners, high-temperature-use air conditioners, air and water- cooled chillers and FCU & AHU. Moreover, a joint laboratory named Shenling-Siemens network-based professional lab for air-conditioning operating & monitoring system was set up in Shenling, which was the first lab of this kind co-constructed with Siemens in HVAC industry in china.