Air exchange system with multiple air blowers or fans to produce a cyclone-like air flow

Abstract

An air exchange system places the air pumps or fans outside of the main air outflow pathway through a device, such as a range hood. By using this configuration, the system is made safe, easy to maintain with less noise and may even increase the efficiency of the air pump by not subjecting it to debris, particles or turbulence in the air flow, also flexible to add more pumps with significant increase the size of the air exchange system. Air pumps can be operably connected to push air into two or more air reservoirs. Each air reservoir has a narrow air outlet slit along with a Coanda design. When air comes out of the narrow air outlet, it has high speed and generates a negative pressure due to the Bernoulli effect. Such negative pressure will bring more air around into the air flow system, thus causing a desired air exchange.

What is claimed is: 
     
         1 . An air flow system comprising:
 one or more air pumps supplying air flow to at least two air reservoirs;   an air slit providing air outflow from the at least two air reservoirs into an air flow path through the air flow system; and   a Coanda surface disposed along an interior surface of the at least two air reservoirs, wherein   the outflow from the at least two air reservoirs pulls air into the air flow system due to the Bernoulli effect, and   there are no air fans or blowers disposed in the air flow path through the air flow system.   
     
     
         2 . The air flow system of  claim 1 , wherein the air fans or blowers are disposed proximate to the at least two reservoirs. 
     
     
         3 . The air flow system of  claim 1 , wherein the air fans or blowers are disposed away from the at least two reservoirs. 
     
     
         4 . The air flow system of  claim 1 , further comprising one or more deflector plates providing direction of air flow or multiple air reservoirs. 
     
     
         5 . The air flow system of  claim 1 , wherein air passing through the air reservoirs is turned equal or greater than 90 degrees prior to exiting the air slit. 
     
     
         6 . The air flow system of  claim 1 , further comprising a structural modification operable to create a cyclonic air flow exiting the air flow system. 
     
     
         7 . The air flow system of  claim 6 , wherein the structural modification is spiral exhaust tube. 
     
     
         8 . The air flow system of  claim 1 , further comprising a structural modification operable to create a tornadic air flow exiting the air flow system. 
     
     
         9 . The air flow system of  claim 1 , further comprising an air valve adapted to control the flow of air into the air reservoirs. 
     
     
         10 . The air flow system of  claim 1 , wherein the air slit is from about 0.1 mm to about 10 mm wide. 
     
     
         11 . An air flow system comprising:
 one or more air pumps supplying air flow to at least two air reservoirs;   an air slit providing air outflow from the at least two air reservoirs into an air flow path through the air flow system;   a Coanda surface disposed along an interior surface of the at least two air reservoirs; and   a spiral exhaust tube operable to create a cyclonic air flow exiting the air flow system, wherein   the outflow from the at least two air reservoirs pulls air into the air flow system due to the Bernoulli effect;   there are no air fans or blowers disposed in the air flow path through the air flow system; and   air passing through the air reservoirs is turned equal or greater than 90 degrees prior to exiting the air slit.   
     
     
         12 . The air flow system of  claim 11 , further comprising one or more deflector plates providing the direction of air flow or multiple air reservoirs. 
     
     
         13 . The air flow system of  claim 11 , further comprising an air valve adapted to control the flow of air into the air reservoirs. 
     
     
         14 . The air flow system of  claim 11 , wherein the air slit is from about 0.1 mm to about 1.5 mm wide.