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    • 11. 发明申请
    • METHOD AND APPARATUS FOR MEASUREMENT OF TOTAL FLOW RATE IN VENTILATION INSTALLATIONS
    • 用于测量通风装置总流量的方法和装置
    • WO1992022790A1
    • 1992-12-23
    • PCT/SE1992000413
    • 1992-06-12
    • ABB FLÄKT AKTIEBOLAGHOLMBERG, RoySJÖQVIST, Lennart
    • ABB FLÄKT AKTIEBOLAG
    • G01F01/34
    • G01F1/34F04D27/00F24F11/72G01P5/14
    • A method and apparatus for determining the total flow rate in a ventilation installation with a free suction fan (15) are described. The flow rate is determined by measurement of the local pressure at at least one measurement point in the vicinity of the inlet opening of the free suction fan. A measurement probe (20), open at one end only, is used as measurement means, and oriented with its longitudinal axis in the inflow direction. The measurement point (20a) is situated axially inside an outer radial plane (B), which is located at an axial distance (a) outside an inner radial plane (A). The measurement point is located adjacent to said inner radial plane (A), though always in the narrowest section of the fan inlet. In this way there is obtained good measurement accuracy within a large flow range.
    • 描述了一种用于通过自由吸风机(15)确定通风装置中的总流量的方法和装置。 通过在自由吸入风扇的入口附近的至少一个测量点处的局部压力的测量来确定流量。 仅在一端开口的测量探头(20)用作测量装置,并且其纵向轴线在流入方向上定向。 测量点(20a)轴向位于外径向平面(B)内,外径向平面(B)位于内径向平面(A)外的轴向距离(a)处。 测量点位于与所述内径向平面(A)相邻的位置,尽管总是在风扇入口的最窄部分。 以这种方式在大流量范围内获得了良好的测量精度。
    • 15. 发明申请
    • AIR DATA SENSOR WITH CLEANING MEANS FOR PNEUMATIC LINES
    • 空气数据传感器,用于气动线路清洁
    • WO2012160349A1
    • 2012-11-29
    • PCT/GB2012/051079
    • 2012-05-15
    • BAE SYSTEMS plcELLISON, William Frank
    • ELLISON, William Frank
    • G01P5/14G01P3/62G01P13/02G01L19/06
    • G01P5/16B08B5/04B23P11/00G01L19/0627G01P3/62G01P5/14G01P13/025Y10T29/49826
    • Apparatus and method for providing the apparatus, the apparatus comprising: a duct; and anon-return valve (18, 24); wherein the duct comprises a first portion and a second portion; the first portion has a first end (28, 30) and a second end; the first end (28, 30) is open to a fluid (e.g. air); the second end is connected to the second portion such that fluid is permitted to flow between the first portion and the second portion; the non-return valve (18, 24) is positioned at or proximate to the second end; and the non-return valve (18, 24) is arranged such that, upon application of a suction force to the first portion at the first end(28,30), fluid flows into the first portion via the non-return valve (18, 24) from outside the duct, and through the first portion from the second end to the first end (28, 30).
    • 一种用于提供该装置的装置和方法,所述装置包括:管道; 和止回阀(18,24); 其中所述管道包括第一部分和第二部分; 第一部分具有第一端(28,30)和第二端; 第一端(28,30)对流体(例如空气)开放; 第二端连接到第二部分,使得允许流体在第一部分和第二部分之间流动; 止回阀(18,24)定位在第二端处或其附近; 并且止回阀(18,24)被布置成使得当在第一端(28,30)处向第一部分施加吸力时,流体经由止回阀(18)流入第一部分 ,24),并且从第二端到第一端(28,30)的第一部分。
    • 17. 发明申请
    • FLOWMETER
    • 流量计
    • WO99009376A1
    • 1999-02-25
    • PCT/FI1998/000636
    • 1998-08-18
    • G01F1/34G01F1/36G01F1/38G01F1/46G01F1/74G01P5/14G01P5/16
    • G01F1/74G01F1/34G01F1/363G01F1/383G01F1/46G01P5/14G01P5/16
    • The invention relates to a device and a procedure for measuring the flow of a gas or gas mixture in a flow channel (7), said device comprising a frame (10), which comprises measuring space (8), a measuring duct (6), which is mounted on the frame between the flow channel and the measuring space and which is open at both ends (2, 9) to pass the pressure wave generated by the flow from the measuring duct into the measuring space, and a measuring element (1) mounted on the frame and used to measure the pressure wave, said measuring element being disposed near the second end (9) of the measuring duct. According to the invention, the measuring duct is disposed in a substantially perpendicular orientation relative to the direction of flow the gas or gas mixture and so that it can rotate about its longitudinal axis, the measuring duct comprises a first orifice (4), which is disposed at the first end (2) of the measuring duct and faces alternately in the direction of flow and against the flow to pass a changing and cyclic pressure wave into the measuring duct, and the measuring duct comprises a second orifice (3), which is disposed in the part of the measuring duct extending into the measuring space to equalise the static pressures in the measuring space and measuring duct.
    • 本发明涉及一种用于测量流动通道(7)中的气体或气体混合物的流动的装置和程序,所述装置包括框架(10),其包括测量空间(8),测量导管(6) ,其安装在流路和测量空间之间的框架上,并且在两端(2,9)处打开,以将由流量从测量管道产生的压力波传递到测量空间中,并且测量元件 1)安装在框架上并用于测量压力波,所述测量元件设置在测量管道的第二端(9)附近。 根据本发明,测量管道相对于气体或气体混合物的流动方向以基本上垂直的方向设置,并且使得其可以围绕其纵向轴线旋转,测量管道包括第一孔口(4) 设置在测量管道的第一端(2)处,并且在流动方向上交替地面对流动,以将变化的和循环的压力波传递到测量管道中,并且测量管道包括第二孔口(3) 设置在测量管道的延伸进入测量空间的部分,以均衡测量空间和测量管道中的静压力。