Air conditioning
AssigneeCasaire Limited
InventorRobert Sidney Simmons
Life of this patent
Estimating the term…
Abstract
A method of cooling air in a space and air conditioning apparatus for carrying out this method. Primary air at a temperature much below the temperatures used in conventional systems, is mixed with secondary drawn from the space, the mixture then being introduced into the space in order to cool it. Mixing takes place in a venturi diffuser or mixing device which enables a high induction ratio to be achieved. The system is more efficient and less costly to install and operate than the conventional systems. In one embodiment, some or all of the primary air may be drawn from the space, thereby avoiding the wasteful discharge of cold air to atmosphere.
Claims13
A method of cooling a space comprising providing tubular venturi mixing devices or diffusers having primary air nozzles, bell-mouthed secondary air inlets, and outlets for discharging mixed primary and secondary air into said space, said nozzles being disposed at the entrances of the secondary air inlets, and said mixing devices or diffusers and the inlets thereof being disposed at high level within the space;
- cooling a supply of primary air to a temperature substantially below a desired temperature of the space;
- distributing the so-cooled primary air to said nozzles into said secondary air inlets;
- inducing with said jets flows of secondary air from the high level in the space directly into the inlets;
- and forming a mixture of said primary air and secondary air in the devices or diffusers in which the volume of secondary air represents at least 50% of the total volume of mixed primary and secondary air discharged into the space through said outlets.
Apparatus for cooling a space by the method which includes cooling a supply of primary air to a temperature substantially below a desired temperature of the space, distributing the so-cooled primary air to a plurality of tubular venturi mixing devices or diffusers disposed at high level within the space and directing a jet of primary air into one end of each mixing device or diffuser so as to induce a flow of secondary air from the space directly into the diffuser and cause mixing with the primary air to produce a mixture which has a desired intermediate temperature and which flows out from the diffuser into the space, said apparatus comprising a refrigeration unit for cooling a supply of primary air to a temperature substantially below a desired temperature of the space, ducting for distributing the so-cooled primary air to terminating nozzles associated with a plurality of tubular venturi diffusers or mixing devices disposed at high level in the space, each nozzle being arranged to direct a jet of primary air into one end of an associate tubular venturi diffuser, so as, in use, to induce a flow of secondary air from the upper level in the space directly into the diffuser and cause mixing with the primary air to produce a mixture which has a desired intermediate temperature and which flows into the space from the other end of the diffuser.
Dependencies are inferred from the claim text.