Double Grille features: 1, double adjustable blade, available different distances and different air diffusion angle 2, can be used as outlet 3, 4 optional aluminum or iron production, can be used in conjunction with the rotary valve work flow outlet utilizing the rotation of the wind, the air spirally sent, induced to produce a very high ratio of the outlet, so that air from the surrounding room air rapidly mixing. With conventional diffuser different swirl diffusers of the duct radially arranged air duct in the guide through swirl diffusers central air-conditioning outlet duct, forming a jet tangentially (see Figure 1). Air-conditioning vents throughout the outlet in a multi-role jets, generating a group such as a typhoon-like vortex. The central region of the vortex formed a negative pressure zone, induce ambient room air quickly mixed with air, the entire air stream is steady-state level of diffusion flow. Its induction ratio is 10-20 times that of conventional diffusers. Outlet, Hanyang outlet, Wuhan Han Wei Wei Li Yuen Yuen provided by the Wuhan-being of Equipment Co., Ltd. Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) strong, credible, in Wuhan, Hubei fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wuhan Han Wei Li Yuen and you hand into the brilliant, for a better future!