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    • 6. 发明授权
    • Air inlet system
    • 进气系统
    • US4498373A
    • 1985-02-12
    • US485746
    • 1983-04-18
    • Willard W. DittmerMark W. Dittmer
    • Willard W. DittmerMark W. Dittmer
    • F24F7/00F24F11/04F24F13/14F24F7/007
    • F24F11/043F24F13/1413F24F13/1486F24F7/00
    • In negative pressure ventilating system wherein atmospheric air is introduced along the walls of a building adjacent the roof, insulated, hinged valves provided within the associated airways rise automatically from their lower, fully closed position by the pressure of the incoming air as the inside pressure is reduced to below atmospheric. The bottoms of the valves and the surfaces upon which they rest, when closed by gravity, are contoured to reduce resistance to free air flow in the airways. A smooth, uninterrupted change of directional flow is effected by streamlining both the valves and the opposed surfaces, virtually eliminating air turbulence from the inlets to the discharge ends of the air ducts. By elimination of abrupt changes in the direction of flow the incoming air is properly controlled. The air is gradually directed along the airways downwardly and inwardly away from the ceiling and the adjacent wall such as to provide proper air distribution within the building regardless of variances in the rate of air flow. The surfaces are formed on baffling which controls air circulation within the building.
    • 在负压通风系统中,其中大气沿着与屋顶相邻的建筑物的壁被引入,设置在相关联的气道内的绝缘的铰链阀门通过进入空气的压力自动地从其下部完全关闭位置升高,因为内部压力为 降至低于大气压。 当通过重力关闭时,阀门的底部和它们静止的表面形成轮廓,以减少对气道中的自由空气流动的抵抗力。 定向流动的平稳,不间断的变化是通过简化阀门和相对表面来实现的,实际上消除了入口到空气管道的排放端的空气湍流。 通过消除流动方向的突然变化,进入的空气被适当地控制。 空气沿着气道向下并向内远离天花板和相邻的壁逐渐引导,以便在建筑物内提供合适的空气分布,而不管空气流量的变化如何。 这些表面形成在控制建筑物内的空气循环的挡板上。
    • 7. 发明授权
    • Fluid flow control means
    • 流体流量控制装置
    • US4377968A
    • 1983-03-29
    • US223324
    • 1981-01-08
    • Ulric K. Gerry
    • Ulric K. Gerry
    • F24F11/04F24F13/08G05D7/01F24F13/10
    • F24F13/08F24F11/043G05D7/012F24F2013/1493Y10S251/901Y10T137/7875
    • The present invention relates to an arrangement for controlling fluid flow through an aperture.In one embodiment, the flow control arrangement, which may be used in association with a window to control the flow of ventilating air, comprises a strip brush composed of an array of resilient filaments firmly mounted at their root region. The free end region of the filaments define, with a fixed flange, the effective area or width of an aperture for the passage of ventilating air. Variations in the strength of the air flow incident to the array of filaments causes changes in the degree of deflection of the filaments, thus altering the effective width of the aperture and controlling the air flow through the aperture.
    • 本发明涉及一种用于控制通过孔的流体流动的装置。 在一个实施例中,可以与用于控制通风空气流动的窗口相关联地使用的流量控制装置包括由其牢固地安装在其根部区域处的弹性细丝阵列组成的带状刷。 长丝的自由端区域用固定的法兰限定用于通风空气通过的孔的有效面积或宽度。 入射到细丝阵列的空气流的强度的变化导致长丝的偏转程度的变化,从而改变孔的有效宽度并控制通过孔的空气流。
    • 10. 发明授权
    • Apparatus and method to optimize fume containment by a hood
    • 通过罩优化烟雾容纳的装置和方法
    • US6131463A
    • 2000-10-17
    • US918408
    • 1997-08-26
    • Robert H. Morris
    • Robert H. Morris
    • F24F7/00F24F11/04G01L7/00
    • F24F11/043F24F2007/001F24F2011/0042
    • A system for optimizing the flow of air through a fume hood by dynamically controlling the air flow to provide a stable vortex in the vortex chamber of the hood, the optimum condition for minimizing backflow of fume-laden air through the hood doorway. A highly-sensitive pressure sensor disposed at a critical location in the vortex chamber sidewall senses minute variations in vortex pressure indicative of turbulence and sends signals via a transducer to an analog controller which uses proportional integral and adaptive gain algorithms to formulate output signals to an actuator which adjusts dampers in the hood to change the airflow into the vortex. The system operates in feedback mode and seeks a minimum in the amplitude of the sidewall pressure variations, indicating that turbulence has been eliminated and that a stable vortex exists. The pressure sensor signals can also be directed to an alarm to signal an off-standard and potentially dangerous condition.
    • 通过动态地控制空气流量以在发动机罩的涡流室中提供稳定的涡流来优化通过通风橱的空气流的系统,这是使通过发动机罩门口的含烟空气回流最小化的最佳条件。 设置在涡流室侧壁的关键位置的高灵敏度的压力传感器感测到指示湍流的涡流压力的微小变化,并且经由换能器将信号发送到模拟控制器,该模拟控制器使用比例积分和自适应增益算法来将输出信号配置到致动器 其调节罩中的阻尼器以将气流改变成涡流。 该系统在反馈模式下工作,并且寻求侧壁压力变化幅度的最小值,表明湍流已被消除并且存在稳定的涡流。 压力传感器信号也可以被引导到报警器来发出标准的和潜在的危险的状况。