Abstract: An air flow mixer structure for a vehicle air conditioning system has a first conduit for a first air flow, a second conduit for a second air flow, an opening between said first and second conduits for merging said first and second air flows in a merging region and a common air channel for said merged air flows, the mixer structure having an air inlet region and an air outlet region opening into said merging region, the structure comprising plural air passages disposed between said inlet region and said outlet region for dividing an air flow at said inlet region into plural air flows at plural said openings into said merging region.

Abstract: A static air mixing apparatus for mixing of air passing through a space of duct. The apparatus includes an inner enclosure at least partially traversing the duct, an outer enclosure surrounding the inner enclosure, a first plurality of radial vanes extending outwardly from a center of the inner enclosure to adjacent the inner enclosure, a second plurality of radial vanes extending from between the inner and outer enclosures, and a transition member forming a divergent retention region downstream of the enclosures for prolonging mixing of different temperature airstreams as they pass through the air mixing apparatus. Further, the apparatus is derived from an optimized depth ratio defined by the ratio of the depth of the enclosures to the minimum diameter of the outer enclosure which is between about 0.25 to 0.40, and a core ratio defined by the ratio of the area of the inner enclosure to the area of the outer enclosure including the area of the inner enclosure which is between about 0.55 to 0.65.

Abstract: A static air mixing apparatus for mixing of air passing through a space or duct. The apparatus includes an inner enclosure at least partially traversing the duct, an outer enclosure surrounding the inner enclosure, a first plurality of radial vanes extending outwardly from a center of the inner enclosure to adjacent the inner enclosure, a second plurality of radial vanes extending from between the inner and outer enclosures, and a transition member forming a divergent retention region downstream of the enclosures for prolonging mixing of different temperature airstreams as they pass through the air mixing apparatus. Further, the apparatus are derived from an optimized depth ratio between the depth of the enclosures to the minimum diameter of the outer enclosure of between 0.37 and 0.40 and core ratio between the core area defined by the inner enclosure to the outer enclosure area including the core area of between about 0.60 to about 0.65.

Abstract: An air conditioning system for a pressurized aircraft body includes an air flow closed loop into which fresh air may be introduced either through a fresh air treatment unit or through a trim valve or through both. A first series connection of system components includes a fresh air intake (FA), a closed loop controlled volume flow control valve (FCV) (11, 11.1, 11.2), an air-conditioner (8, 8.1, 8.2), an air mixer (9), and the space (10) to be air-conditioned interconnected by air ducts. A cabin pressure closed loop control (1) controls the air volume through the (FCV) valve. The air-conditioner unit (8) is controlled by an air conditioning closed loop control (2). A second series connection includes a filter (7), a blower (6), and a heat exchanger (4) and preferably a CO.sub.2 adsorber (5) series connected between the blower (6) and the heat exchanger (4). This second series connection forms a recycling circuit flow connected in parallel to the air mixer (9) and to the space (10).

Abstract: A static mixer device for mixing separate fluid streams entering the device in order to achieve a more uniform, or homogeneous, characteristic, such as temperature for example, in the resulting fluid mixture stream exiting the device. An exemplary embodiment of device comprises a series of parallel rectangular walls arranged in side-by-side, spaced apart relationship to form a series of rectangular spaces. The perimeters of these spaces are selectively closed to define respective first and second inlets and an outlet. The inlets sub-divide the respective entering fluid streams into sheet-like streams that are interleaved as they exit the device at the outlet. This interleaving of one stream with the other promotes increased homogeneity of the mixture stream in a shorter distance downstream of the confluence of the entrance streams.

Abstract: A novel plenum chamber and system for the mixing and subsequent distribution of two different fluids. In the preferred example the fluid is air and the chamber mixes fresh and recycled air proportionately and subsequently distributes the air stream through buildings, etc. The plenum chamber is in connection with an fresh air inlet duct and a recirculated air inlet duct at opposite ends, and an outlet duct along a third side. Louver panels divide the chamber into passages that are connected to one of the two intake ducts, the passages alternate being in connection with one or the other of the intake ducts so as to create a stratified mixture of air layers, alternating fresh layer, recirculated layer, etc. chambers. The outlet section is in connection with a distribution fan for dispersal to the rest of the building.

Abstract: An apparatus for mixing air streams in a duct or plenum of a heating, ventilating or air conditioning system is within a rectangular frame and comprises a centrally located square solid sided pyramid shaped deflector surrounded by four sets of air directing vanes, two long sets and two short sets, in rectangular apertures. The vanes divide oncoming air streams which pass through the rectangular apertures, along the vane's curved cross-sections, and are discharged at the vane's discharge angle toward the base of the pyramid shaped deflector. The pyramid shaped deflector divides the remaining oncoming air streams along each of its solid sides and directs the air streams into the mixing region. The divided air streams interface and mix in a region located around the pyramid shaped deflector's base to evenly temper air streams in a heating, ventilating or air conditioning system and distribute the mixed air uniformly across the downstream plenum or duct.

Abstract: An element for use in ductwork of a heating and air conditioning system includes a converging shape that causes pressure of the air flowing therethrough to decrease and which establishes a negative pressure between the surroundings of the element and the air flowing through the element. A plurality of vents are defined in the element whereby air from a room flows into the element to be mixed with conditioned air in the element before that conditioned air is exhausted into the room. The converging shape of the element causes pressure to vary according to a specific relationship, and each of the vents has a cross sectional area that varies according to the same relationship whereby adjacent vents have different cross sectional areas.