摘要:
A valve includes a film (22) having side edges and an opening (24) to extend across a passage (54) in a housing (20) of a HVAC system. The film (22) has a circular aperture (28) in the film (22) adjacent each rounded corner of each opening (24) for relieving stress. Either or both of the leading edge and the trailing edge of the film (22) are undulated (32) to prevent deformation of the edges. A pair of the racks (34) is disposed on the film (22) and sprockets (38) engage the teeth (36) of the racks (34) for moving the racks (34) and the film (22) linearly. Each rack (34) includes a strap (44) and a bearing member (46) for retaining the associated sprocket (38) in engagement with the teeth (36). The bearing member (46) is in rolling engagement with a bearing surface (48) of the associated strap (44) as it rotates with the sprockets (38).
摘要:
An air distribution apparatus for an automotive vehicle, comprising a chamber (72) for receiving air conditioned by at least one heat exchanger, the chamber includes an inlet opening and a plurality of discharge openings (16,18,20) and mechanism downstream of the inlet opening for selecting at least one of the discharge openings. The mechanism for selecting comprises a pair of rollers (22,24), a flexible material (34) disposed between the rollers (22,24) and having at least one cutout area (36); and a mechanism (42,44) for bidirectional driving of the rollers for positioning the flexible material such that the cutout area (36) is either positioned for allowing air flow through at least one of the discharge openings (16,18,20) or for preventing air flow through any of the discharge openings.
摘要:
A novel planetary roller type flow control valve, which can precisely control a flow rate and has a small friction, is provided. The planetary roller type flow control valve comprises a plurality of planetary rollers (2) having different diameters from one another and being externally contiguous to a roller (1) serving also as an input shaft, a ring (3) being internally contiguous to the same planetary rollers and having a predetermined width in its axial direction, a housing (4) fitting around the same ring with its inner circumference partly kept in contact with the outer circumference of the same ring and held coaxial and liquid-tight with respect to the above-mentioned roller serving also as an input shaft, a fluid inlet (5) provided at one angular position of the inner circumference of the same housing so as to be interceptable by the predetermined width of the above-mentioned ring, and a fluid outlet (6) provided at another angular position of the inner circumference of the same housing so as to be interceptable by the predetermined width of the aforementioned ring.
摘要:
Die Erfindung betrifft ein Be- und Entlüftungsventil für Fluid führende Rohrleitungen bzw. Armaturen, mit einem im Wesentlichen becherförmigen und nach unten hin querschnittsverkleinemd ausgebildeten Ventilkörper (6) zum Verschließen und Öffnen eines Ventilabgangs (3), mit einem Membranbecher (9), welcher einem Schwimmkörper (11) des Ventils zugeordnet ist, und mit einer Rollmembran (8), die zwischen dem Ventilkörper und dem Membranbecher (9) angeordnet ist und in unterschiedlichen Verschluss- bzw. Öffnungsstellungen über Durchlassöffnungen (10) des Ventilkörpers (6) zu liegen kommen kann. Der Membranbecher (9) weist gemäß einem Aspekt der Erfindung eine Innenkontur auf, die sich im Wesentlichen entsprechend der Außenkontur des Ventilkörpers (6) nach oben hin aufweitet. Gemäß einem weiteren Aspekt ist der Ventilkörper (6) beweglich an seinem Sitz (4) am Ventilabgang (3) angeordnet, so dass er im Bereich des Ventilkörpersitzes (4) einen Durchlass freigeben und schließen kann.
摘要:
This invention relates to a pressure compensating valve and more particularly, but not exclusively, to a balanced pressure compensating valve, or regulator. The valve includes a chamber (6) for containing fluid, defined by a flexible barrier (2) trapped between first (3) and second (4) surfaces. A fluid inlet provides fluid to the interior of the chamber. A fluid outlet selectively allows fluid to pass out of the chamber. Movement of the first (3) and second (4) surfaces relative to each other causes change in contact between the flexible barrier and the first and second surfaces to selectively open the fluid outlet, in a first position, and occlude it between the flexible barrier and one of the surfaces, in a second position.
摘要:
A HVAC curtain valve (20) that can operate at very low torque and can be assembled easily is provided. The valve (20) has an inlet (23), an outlet (25), and a curtain closure (40). The curtain closure (40) adjustably controls fluid flow through the outlet (25) and includes a diaphragm (40) held in an insert (30). The insert (30) has a dimension larger than a mating surface on the valve body (22) so that it can be secured without fasteners. The valve (20) can employ a radially and axially moveable shoe (350) to assure tight close off.