Fresh air unit and the air conditioning unit Difference between the two: fresh air units mainly deal with outdoor air fresh air unit brand, and air conditioning units for processing through the air ventilator treatment; but the new fans can have return air, return air can have fresh air, its purpose is In order to better regulate the temperature and humidity, and other parameters. Fresh air unit and the air conditioning unit distinguish three: fresh air units generally do not bear the heat and moisture load of fresh air unit air conditioning area, the main function is to send fresh air. Ideally, of course, air temperature and humidity constant, so the new air unit general control air temperature and humidity. New air control unit controls include: supply air temperature control, air relative humidity control, frost control, CO2 concentration control, and various interlock content. If the new commitment to consider indoor air unit loads (eg DC-type units), but also to control the room temperature (or indoor relative humidity). 1. supply air temperature control Supply air temperature control which means the fix air temperature control, the applicable conditions are usually the fresh air unit is to meet the health requirements rather than a burden indoor indoor load to use. Thus, the control over the entire time, which is to maintain a constant supply air temperature principle. Since the winter and summer indoor requirements are different, therefore in winter and summer air temperature should be different requirements. That is the new air unit maintenance, new air unit at a given supply air temperature control, two control values ??throughout the year - winter and summer control value control value of the new air unit specifications and must be considered controller winter, summer conditions of conversion issues . When the supply air temperature control, usually summer water cooling coil control, winter control steam flow hot water or steam coil coil. To facilitate the management, the temperature sensor is generally located in the room where the air tube inside the unit. Carbon dioxide (CO2) concentration control is usually the maximum air flow of new air handling units are (except to bear the load of the DC-style indoor unit) Press meet hygiene requirements and design, then press the number of rooms at full consideration. In actual use, the room number is not always full, and when a small number of people, fresh air can be reduced in order to save energy, this method is particularly suitable for certain uses fresh air plus air unit coil system of office building space small meeting rooms and other places use. In order to guarantee the basic quality of indoor air, indoor CO2 concentrations usually measured way to measure, as shown in Figure 4-43. CO2 concentration controller are located in each room to control the degree of opening of new wind electric air manifold on the same time, in order to prevent the system static pressure is too high, set the static pressure controller controls the fan speed on the total air pipe. Therefore, this will not only reduce the load of new air-cooled, and fan energy consumption will decline. The new wind power units, Rui Xincheng air conditioning, new air handling units provided by Jinan Rui Xincheng Air Conditioning Equipment Co., Texas. Rui Xincheng Texas Air Conditioning Equipment Co. (www.dzrxckt.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!