Abstract The invention relates to a process and device for ventilation and air conditioning, which operate by steam or compressed air ejection. The process performs the entrainment and mixing of the air as a secondary fluid with the primary fluid by creating a depression in the primary fluid, introduced under pressure into an annular chamber; the primary fluid expands through an annular slot, between two axially confronting surfaces; due to the Coanda effect, the emergent flow adheres pellicularly to a closed surface with a curved profile, located downstream of the slot. The device includes a Coanda ejector of the outer type fastened to a support; the device includes a cylindrical body in which the annular chamber is located. The cylindrical body is connected by a screw thread to the curved profile body of revolution; between the two bodies is arranged the adjustable slot. The ejector is disposed in a cylindrical tube with a layer of acoustic insulation having an air-inlet at the upstream end and obturation means with flaps at the downstream end from the ejector.
Inventors
👤 C Teodorescu
👤 C Ceauselu
👤 S Ioanitescu
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 11:40
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/24; F24F13/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
226 words
A ventilating apparatus comprising an upright tube formed with a perforated inner wall, a layer of acoustical insulation surrounding said inner wall and an imperforate outer wall surrounding said layer of acoustical insulation; an external COANDA ejector disposed in said tube at an intermediate location there-along and comprising a support of lenticular cross-section extending laterally into said tube at said location and formed with a passage for feeding a primary fluid to said ejector, a cylindrical body fiXed to said support and defining an annular chamber around an axis coinciding with the axis of said tube, a COANDA body of revolution spacedly juxtaposed with and mounted upon said cylindrical body to define an outwardly open annular slot communicating with said chamber, said body of revolution having an arcuate convex portion adjacent said slot and tapering upwardly away from said convex portion whereby fluid dispensed from said slot adheres to said body of revolution by the COANDA effect and induces a pressure drop at said location drawing air into said tube, the air being entrained through said tube by the COANDA flow along said body, and means for adjusting the width of said slot; flaps at the upper end of said tube for controlling the flow of air therethrough and an acoustic baffle at the lower end of said tube for admitting air laterally into the latter.
Claim 2
Dependent Claim
226 words
A ventilating apparatus comprising an upright tube formed with a perforated inner wall, a layer of acoustical insulation surrounding said inner wall and an imperforate outer wall surrounding said layer of acoustical insulation; an external COANDA ejector disposed in said tube at an intermediate location there-along and comprising a support of lenticular cross-section extending laterally into said tube at said location and formed with a passage for feeding a primary fluid to said ejector, a cylindrical body fiXed to said support and defining an annular chamber around an axis coinciding with the axis of said tube, a COANDA body of revolution spacedly juxtaposed with and mounted upon said cylindrical body to define an outwardly open annular slot communicating with said chamber, said body of revolution having an arcuate convex portion adjacent said slot and tapering upwardly away from said convex portion whereby fluid dispensed from said slot adheres to said body of revolution by the COANDA effect and induces a pressure drop at said location drawing air into said tube, the air being entrained through said tube by the COANDA flow along said body, and means for adjusting the width of said slot; flaps at the upper end of said tube for controlling the flow of air therethrough and an acoustic baffle at the lower end of said tube for admitting air laterally into the latter.
Claim 3
Dependent Claim
51 words
The apparatus defined in claim 1 wherein said COANDA ejector includes a thread on said cylindrical body, said body of revolution being threadedly engaged with said cylindrical body and said ejector further includes a profiled piece for securing said body of revolution in a predetermined position relative to said cylindrical body.