Air injection tube and a method for air injection
AssigneeKE-Burgmann A/S
InventorsFrede Danielsen, Carsten Jespersen
Life of this patent
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Abstract
An air injection tube for injecting ventilating, cooling and/or heating air for installation in a room where the tube has a plurality of small, mutually spaced air injecting openings defined in its peripheral wall along longitudinally extending wall zones of the tube. The air injection openings are arranged in a plurality of groups or patterns each comprising two or more peripherally spaced rows of openings which are mutually spaced along the length of the zone and the longitudinal spacing of adjacent groups or patterns substantially exceeds the mutual longitudinal spacing of the openings in each group or pattern of openings.
Claims38
An air injection tube for injecting ventilating, cooling and/or heating air into a room in which the tub is installed, a plurality of small, mutually spaced air injecting openings being defined in the peripheral wall of the tube along at least one longitudinally extending wall zone of the tube having a cross-sectional shape defining an arc of a circle, the openings of the zone being arranged in at least two peripherally spaced rows of openings and in predetermined groups or patterns, which are mutually spaced along a length of said zone, the longitudinal spacing of adjacent groups or patterns substantially exceeding the mutual longitudinal spacing of the openings in each group or pattern of openings, the maximum angular spacing of the air injection openings in peripherally adjacent rows of each group or pattern of openings being 45.degree. each of the groups or patterns of air injection openings being spaced from the wall surfaces defining the room, whereby primary air flow exiting through the air injection openings of the axially spaced groups or patterns of openings induces a substantial increase in secondary flow of room air directed towards the air injection tube.
A method of injecting ventilating, cooling and/or heating air into a room by means of an air injecting tube installed in a room, said tube having a plurality of small, mutually spaced injecting openings being defined in the peripheral wall of the tube along at least one longitudinally extending wall zone of the tube having a cross-sectional shape defining an arc of a circle, the openings of the zone being arranged in at least two peripherally spaced rows of openings and in groups or patterns, which are mutually spaced along the length of the zone, the longitudinal spacing of adjacent groups or patterns substantially exceeding the mutual longitudinal spacing of the openings in each group or pattern of openings, the maximum peripheral spacing of the air injection openings in peripherally adjacent rows of each group or patterns of air injection openings being spaced from the wall surfaces defining the room, said method comprising supplying air to the inner space of the tube at a pressure so as to cause air to flow out through the air injecting openings defined in the wall of the tube at a velocity of 6-15 m/sec, whereby primary air flows exciting through the maximum peripheral spacing of the air injection openings in peripherally adjacent rows of each group or patterns of air injection openings being spaced from the wall surfaces defining the room, whereby primary air flows exiting through the air injection openings of the axially spaced groups or patterns of openings induce a substantial increase in secondary flows of room air directed towards the air injection tube.
For injecting a primary fluid into an enclosure filled with secondary fluid, a tube installed in the enclosure for substantially increasing secondary fluid flow around the tube to enhance mixing of primary and secondary fluid, said tube comprising:
- a peripheral wall extending along an axis in a longitudinal direction and having a cross-sectional shape defining a circle,
- a plurality of fluid injection openings in said peripheral wall, said openings arranged in groups which are spaced from each other by zones without openings,
- each of said groups forming a pattern having openings arranged in at least four rows along the longitudinal direction and said rows being spaced along a predetermined arcual segment, so that primary fluid flow applied to the tube and exiting through said plurality of openings induces a substantial increase in secondary fluid flow whereby primary and secondary fluids are thoroughly mixed.
A method of mixing a primary fluid with secondary fluid in an enclosure, to obtain a thorough mixture of fluids, said method comprising:
- installing a fluid injection tube in the enclosure, said tube having a plurality of small, mutually spaced injecting openings being defined in the peripheral wall of the tube along at least one longitudinally extending wall zone of the tube having a cross-sectional shape defining an arc of a circle, the openings of the zone being arranged in at least two peripherally spaced rows of openings and in groups forming patterns, which patterns are mutually spaced along the length of the zone, the longitudinal spacing of adjacent patterns substantially exceeding the mutual longitudinal spacing of the openings in each pattern of openings, the maximum peripheral spacing of the fluid injection openings in peripherally adjacent rows of each pattern being spaced from a wall surface of the enclosure,
- supplying primary fluid under pressure to the inner space of the tube,
- causing primary air flow through the injecting opening to exit at velocities between 6 and 15 m/sec, and
- inducing a substantial increase in secondary fluid flow around the tube, said secondary fluid flow in turn reducing the velocity of primary fluid in the vicinity of the tube.
Dependencies are inferred from the claim text.