With worldwide energy has become tighter, fossil fuels and significantly reduce growth in energy demand, prompting people to explore new ways to improve energy efficiency and the effective utilization of energy. Depending on the level of energy utilization countries, 43% to 70% of the energy mainly in the form of heat is lost, it will result in the city's "heat island effect." Therefore, American and European countries attach great importance to air-conditioning heat recovery technology research and practice Rotary unit, to achieve the second use of energy, thereby reducing energy consumption and emissions directly, in order to achieve energy saving and environmental protection purposes. In China, in recent years the unit, China's air-conditioning heat recovery technology has been rapid development in the practical application of energy-saving effect is obvious, widely used in hotels, hospitals, schools, factories, large stadiums and other places. New air handling units for some once-through system combined air-conditioning unit, the new wind not only make the environment meets health standards, but also bear all the indoor load. Because the indoor load is changed, then use the inevitable way to control the supply air temperature can not meet indoor requirements (possibly too hot or too cold). It is necessary to control the temperature of the place of use. It can be seen, when the temperature sensor must be located in a typical area controlled room. Since the current system is generally provided with ventilation systems, temperature sensor located in the exhaust pipe and to consider certain amendments also a viable option. In addition to the direct-current system, new air handling units and fan coil is usually used together. In some projects, considering a variety of reasons (such as fan coil dehumidification capacity restrictions, etc.), new air unit load to bear part of the interior design, this approach to the design of the state, according to the new air unit supply air temperature control is not there issues. But climate change and making the indoor outdoor (when heating hydraulic conditions) thermal equilibrium (such as some time to transition season), if it continues to control the supply air temperature, will inevitably lead to cold room (when cooling hydraulic conditions) or overheating reach ceiling-mounted unit, then should use the indoor temperature control. Therefore, in this case, from the annual run, it should adopt the joint control supply air temperature and room temperature. Relative humidity control new air unit relative humidity control main thing is to choose the installation position of the humidity sensor or control parameters, which with its humidification source and control the way. Air conditioning unit | unit | air conditioning units, refrigeration system Co. wucheng Dingrui provided by air-conditioning equipment. Wucheng Dingrui Air Conditioning Equipment Co., Ltd. (www.wcdrkt.com) (www.wcdrkt.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Dingrui into the brilliant air conditioning and you work for a better future!