Products series provided by greenheck includes : fans and ventilators , centrifugal and vane axial fans , kitchen ventilation system , damper , louvers , make - up air units and energy recovery ventilators 格林瀚克提供完整的产品系列，包含一般风机与通风设备、商用及工业用离心式风机、轴流式风机、厨房通风系统、风阀、百叶、新风机组及能源回收通风系统。
The motion equations of the unsteady air and water in jig are obtained by the method of fluid dynamics , and the fluid parameters in jig at different characteristic curve of air valve are calculated by use of numerical method 用流体力学方法导出了跳汰机内空气水动力学体系的运动规律，并通过数值计算得出了不同风阀期特性下的跳汰机内的水流运动。
At the same time , as the chief agent of yamatake corporation of japan in the north and east of china , we provide all yamatake ' s ba products , including bms , ddc , sensors , control valves , butterfly valves , actuators and etc 同时我公司为日本山武公司华北区的系统首席代理商，向用户提供山武公司全套楼宇自控产品，包括系统控制软件、 ddc控制器、传感器、电动调节阀、蝶阀及风阀执行器等。
The main function is the calculation degree of all kinds of the valves ( cross valves , blades valves , draught valves , etc . ) fitted in the air system in the condition of the layout and airflow of the air system . and the calculation degree can be exported in the report forms , which can be treated as the fixing degree of valves 软件的主要功能为在已知风系统布置情况及系统风量设计参数下，计算设计工况下的系统中诸如多叶调节阀，风口调节阀，带调节阀片的四通等等部件的阀片计算开度，并将开度结果以报表形式输出，作为安装公司安装风阀时的风阀预调开度。
Jingdu complex compound ultra energy conservation drum wind stove and infrared super energy conservation natural wind stove uses th cast iron type chamber , the stove circle integration design , the wind valve , the are valve , the gearing type adjustment , bums control fore one time to complete time - saving reduce effort dismounting stove legs used disign , operation , transportation extremely converient its market delivery use will be a green revolution of commercial fumace 京都综合体超节能鼓风灶和红外线超节能自然风灶采用铸铁式炉膛，炉圈一体化设计，风阀，气阀，连动式调节，点火，控火一步到位，省时省力，炉腿采用拆装式设计，操作，运输极其方便，它的市场投放使用将是商用炉具的一次革命。
After absorbing heat , the temperature rises to rated value and is let out at hot - blast mouth . when the hot - blast temperature reaches to the rated upper limit , the burner will stop to work automatically or turn to small fire . when the hot wind temperature reaches to the rated lower limit , the burner will kindle again or turn to big fire 需加热的空气通过选配的鼓风机强行送入热风炉、吸热后温度升至额定值从热风出口送出、当热风温度达到额定的上限温度时，燃烧器会自动停止燃烧或自动转为小火陷燃烧，当热风温度降低到额定的下限温度时，燃烧器又会重新点燃运行或转为大火燃烧，升温的速度可调进风阀来实现。
