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.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of priority of U.S. provisional application No. 61 / 679,525, filed Aug. 3, 2012, the contents of which are herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]The present invention relates to air exchange systems and, more particularly, to an air flow system with multiple air blowers that are disposed outside of the air flow.[0003]In traditional air exchange systems, such as a range hood, the fans or air blowers are in the middle of the air outflow duct. The obstacle from the fans or air blowers can cause air flow turbulence, thus decreasing the air flow efficiency. Moreover, the fans or air blowers in the air flow can generate significant noise due to the disturbance which there is hard to muffle. These systems are also difficult and unsafe to maintain. Over time, the dirt or grease from the air flow, especially in the case of a range hood, could accumulate on the fans or air blowers, decre...

AI Technical Summary

Benefits of technology

The patent is about an air flow system that uses air pumps and a Coanda surface to pull air into the system through an air slit, without the need for air fans or blowers. The system can also include a spiral exhaust tube, multiple air flow deflectors, or tangential air flow from air outflow slits to create a cyclonic air outflow. The invention allows for better air flow control and efficiency.

Problems solved by technology

The obstacle from the fans or air blowers can cause air flow turbulence, thus decreasing the air flow efficiency.

Moreover, the fans or air blowers in the air flow can generate significant noise due to the disturbance which there is hard to muffle.

These systems are also difficult and unsafe to maintain.

Over time, the dirt or grease from the air flow, especially in the case of a range hood, could accumulate on the fans or air blowers, decreasing the motor's performance.

Clean-up of these deposits on the motors can be difficult and time consuming.

Furthermore, it has to increase the size of the range hood or other similar air exchange system if more air blowers or fans needed for one air outflow duct.

Images