Airflow enhancement device for hvac systems

Abstract

The present invention relates to an airflow enhancement device for HVAC systems comprising a vent cover with a central air channel, at least one side air channel, and a passive vortex accelerator positioned within the central air channel. The passive vortex accelerator includes a cylindrical body and a plurality of stationary, tapered fins configured to induce a vortex pattern in airflow received from an HVAC duct. The vortex-accelerated airflow is directed into a surrounding environment through the central air channel, while additional airflow may be distributed laterally through side air channels. The device further includes fixed or adjustable louvers to redirect airflow vertically or laterally for improved room coverage. The modular design supports removable installation of the vortex accelerator and allows retrofit or new installations. By passively shaping and accelerating airflow, the invention improves circulation, reduces thermal stratification, and enhances occupant comfort without the need for powered components.

What is claimed is: 
     
         1 . An airflow enhancement device for HVAC systems, the airflow enhancement device comprising:
 a vent cover having a front side and a back side, the vent cover comprising a central air channel;   a passive vortex accelerator disposed within the central air channel, the passive vortex accelerator comprising:
 a cylindrical body positioned with a central axis aligned substantially perpendicular to the vent cover; and 
 a plurality of tapered fins that are stationary and affixed to an inner surface of the cylindrical body, the tapered fins oriented in the direction of airflow to induce vortex formation and thereby accelerate the airflow; 
   wherein the passive vortex accelerator is configured to receive airflow from an HVAC duct, transform the airflow into a vortex pattern via the plurality of tapered fins, and direct the accelerated vortex airflow through the central air channel into a surrounding environment.   
     
     
         2 . The airflow enhancement device of  claim 1 , the vent cover further comprising at least one side air channel positioned laterally relative to the central air channel and configured to direct a portion of airflow in a direction different from the central airflow path. 
     
     
         3 . The airflow enhancement device of  claim 1 , wherein the plurality of tapered fins comprises between five and ten fins equally spaced about the cylindrical body. 
     
     
         4 . The airflow enhancement device of  claim 1 , wherein each tapered fin tapers from a radial distance in the range of 2.6 inches to 2.9 inches at a first end to a radial distance in the range of 2.3 inches to 2.6 inches at a second end. 
     
     
         5 . The airflow enhancement device of  claim 1 , wherein the passive vortex accelerator is removably mounted within the vent cover. 
     
     
         6 . The airflow enhancement device of  claim 1 , the airflow enhancement device further comprising:
 a set of central louvers positioned around the passive vortex accelerator, the central louvers oriented to direct airflow upward, downward, leftward, or rightward relative to the vent cover.   
     
     
         7 . The airflow enhancement device of  claim 1 , wherein the passive vortex accelerator is integrally molded into the vent cover. 
     
     
         8 . The airflow enhancement device of  claim 1 , wherein the airflow exits the cylindrical body in a helical vortex pattern. 
     
     
         9 . The airflow enhancement device of  claim 1 , wherein the cylindrical body of the passive vortex accelerator has a height in the range of 2.5 inches to 5.0 inches and an outer diameter in the range of 2.5 inches to 4.5 inches. 
     
     
         10 . An airflow enhancement device for HVAC systems, the airflow enhancement device comprising:
 a vent cover having a mounting structure for attachment to an HVAC duct opening;   a passive vortex accelerator mounted within the vent cover, the passive vortex accelerator comprising a cylindrical shell having a plurality of fixed, inwardly tapered fins;   a set of central louvers positioned around the passive vortex accelerator, the central louvers oriented to direct airflow upward, downward, leftward, or rightward relative to the vent cover;   wherein the passive vortex accelerator is configured to receive airflow from an HVAC duct, transform the airflow into a vortex pattern via the plurality of fixed, inwardly tapered fins, and direct the accelerated vortex airflow through the vent cover into a surrounding environment.   
     
     
         11 . The airflow enhancement device of  claim 10 , wherein the set of central louvers comprises at least one fixed louver to provide baseline airflow and at least one adjustable louver to enable user-controlled directional adjustment and airflow regulation. 
     
     
         12 . The airflow enhancement device of  claim 10 , wherein the central louvers are horizontally oriented relative to the vent cover surface. 
     
     
         13 . The airflow enhancement device of  claim 10 , wherein the passive vortex accelerator is mounted with its cylindrical axis aligned perpendicular to the vent cover plane. 
     
     
         14 . The airflow enhancement device of  claim 10 , wherein the vent cover further comprises ridge edging around its perimeter, the ridge edging being configured to reduce airflow leakage and dampen vibration-induced noise during HVAC system operation. 
     
     
         15 . An airflow enhancement device for HVAC systems, the airflow enhancement device comprising:
 a vent cover having a central region and opposing lateral regions;   a passive vortex accelerator disposed in the central region, the passive vortex accelerator comprising:
 a cylindrical body having an axis extending from a rear side to a front side of the vent cover; and 
 a plurality of tapered fins afixed to the inner wall of the cylindrical body, each of the plurality of fins extending substantially along the height of the cylinder and tapering radially inward from an inlet end to an outlet end; 
   a pair of vertically oriented side louvers disposed in the lateral regions, each configured to direct airflow laterally left or right;   wherein the passive vortex accelerator is configured to receive airflow from an HVAC duct, induce a vortex pattern in the airflow via the plurality of tapered fins, and direct the accelerated vortex airflow through the vent cover into a surrounding environment.   
     
     
         16 . The airflow enhancement device of  claim 15 , wherein the side louvers are located adjacent to the side air channels of the vent cover. 
     
     
         17 . The airflow enhancement device of  claim 15 , wherein at least one of the side louvers is fixed and at least one is adjustable to control the magnitude of lateral airflow distribution. 
     
     
         18 . The airflow enhancement device of  claim 15 , wherein one or more components of the airflow enhancement device, including the vent cover, the passive vortex accelerator, the tapered fins, the side louvers, and the central louvers, are fabricated from plastic, metal, wood, a composite material, or any combination thereof. 
     
     
         19 . The airflow enhancement device of  claim 15 , wherein the passive vortex accelerator is seated within the central air channel and aligned with airflow received from the HVAC duct. 
     
     
         20 . The airflow enhancement device of  claim 15 , wherein the passive vortex accelerator is configured to be removably coupled to the vent cover to allow for replacement, cleaning, or reconfiguration.