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.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application contains subject matter that is related to the subject matter of the following co-pending application. The below-listed application is hereby incorporated herein by reference in its entirety:

[0002] This is a U.S. non-provisional application that claims the benefit of a U.S. provisional application, Ser. No. 63 / 637,569, inventor John A. Cason, entitled “AIR BOOSTER”, filed Jun. 10, 2024.TECHNICAL FIELD OF THE INVENTION

[0003] This invention relates to heating, ventilation, and air conditioning (HVAC) systems, and particularly to a passive airflow enhancement device configured to improve air distribution, velocity, and directional control within conditioned spaces. The invention specifically concerns vent cover assemblies that incorporate a vortex-inducing structure and integrated airflow guides to modulate the discharge of air from HVAC ductwork into a room environment without requiring powered components or mechanical actuators.BACKGROUND OF THE INVENTION

[0004] Before our invention, airflow delivery in HVAC systems commonly relied on vent covers, registers, or diffusers that incorporated flat grilles, slotted vanes, or fixed louvers. These components were generally passive in design and offered only limited functionality beyond directing airflow in a basic outward direction. While such approaches were simple to manufacture and install, they often failed to meet the growing demand for improved indoor air distribution, occupant comfort, and energy efficiency. As modern buildings have become more tightly sealed and thermally regulated, shortcomings in these conventional airflow delivery mechanisms have become more apparent.

[0005] First, airflow from these earlier designs often lacked the velocity or momentum required to reach distant areas of a room, resulting in temperature imbalances, stagnant zones, and occupant discomfort. Second, the inability to actively or passively redirect airflow across multiple axes meant that air was often unevenly distributed, particularly in rooms with non-central ducts, high ceilings, or complex layouts. Third, most prior approaches offered no means of shaping or enhancing the airflow itself; once air exited the duct, it simply passed through the grille without any internal modulation or structural acceleration. This led to low-efficiency thermal mixing and longer runtimes for HVAC systems. Fourth, the use of flat grilles or slotted openings often resulted in noisy discharge patterns, as turbulent airflow encountered sharp edges or obstructed flow paths—issues exacerbated at higher fan speeds. Fifth, retrofitting these systems with more efficient or directional airflow components was rarely possible without extensive mechanical modification, limiting upgrade paths and long-term usability.

[0006] These and other shortcomings made it difficult to deliver uniform, comfortable airflow using conventional vent hardware. The inability to optimize airflow direction, velocity, and coverage using a fully passive solution represented a persistent limitation in residential and commercial HVAC performance. The present invention addresses these and other shortcomings by providing a passive airflow solution with integrated structural flow modulation. For these reasons and shortcomings, as well as other reasons and shortcomings, there is a long-felt need that gives rise to the present invention.SUMMARY OF THE INVENTION

[0007] The shortcomings of the prior art are overcome, and additional advantages are provided through the provision of an airflow enhancement device for HVAC systems. The device comprises a vent cover having a front side facing the conditioned space and a back side configured to receive airflow from an HVAC duct. The vent cover includes a central air channel and at least one side air channel for distributing airflow along multiple paths. A passive vortex accelerator is disposed within the central air channel and includes a cylindrical body aligned with its central axis, substantially perpendicular to the vent cover. Affixed to the inner surface of the cylindrical body are a plurality of stationary, tapered fins, each oriented in the direction of airflow to induce a vortex pattern. As airflow enters the vortex accelerator from the HVAC duct, the tapered fins impart rotational motion that transforms the incoming air into an accelerated vortex flow, which is then directed through the central air channel into the surrounding environment.

[0008] Additional shortcomings of the prior art are overcome, and additional advantages are provided through the provision of an airflow enhancement device for HVAC systems. The device comprises a vent cover having a mounting structure configured for attachment to an HVAC duct opening. Mounted within the vent cover is a passive vortex accelerator, which includes a cylindrical shell housing a plurality of fixed, inwardly tapered fins. These fins are arranged to induce rotational airflow as air enters from the HVAC duct. Surrounding the vortex accelerator is a set of central louvers oriented to direct the exiting airflow upward, downward, leftward, or rightward relative to the plane of the vent cover. The vortex accelerator is configured to receive incoming air, convert it into a spiraling vortex pattern through its internal fin geometry, and discharge the accelerated airflow into the surrounding environment. The combination of vortex acceleration and louver-based redirection enables enhanced air distribution and coverage within the conditioned space.

[0009] Additional shortcomings of the prior art are overcome, and additional advantages are provided through the provision of an airflow enhancement device for HVAC systems. The device comprises a vent cover having a central region and opposing lateral regions. Disposed in the central region is a passive vortex accelerator, which includes a cylindrical body oriented with its axis extending from the rear side to the front side of the vent cover. A plurality of tapered fins is affixed to the inner wall of the cylindrical body, with each fin extending substantially along the height of the cylinder and tapering radially inward from an inlet end to an outlet end. The lateral regions of the vent cover include a pair of vertically oriented side louvers, each configured to direct airflow laterally to the left or right. The passive vortex accelerator receives airflow from an HVAC duct, generates a vortex pattern via the tapered fins, and directs the accelerated airflow into the surrounding environment.

[0010] Additional features and advantages are realized through the techniques of the present invention. Other embodiments and aspects of the invention are described in detail herein and are considered a part of the claimed invention. For a better understanding of the invention with advantages and features, refer to the description and to the drawings.BRIEF DESCRIPTION OF THE FIGURES

[0011] The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other objects, features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:

[0012] FIGS. 1-4 illustrate examples of perspective views of an airflow enhancement device;

[0013] FIG. 5 illustrates one example of, in reference ‘A’, a passive vortex accelerator assembly into a vent cover, and in reference ‘B’, the assembled airflow enhancement device;

[0014] FIG. 6 illustrates one example of, in reference ‘A’, a perspective view of the passive vortex accelerator, and in reference ‘B’, a front view of the passive vortex accelerator;

[0015] FIG. 7 illustrates one example of a front view of an airflow enhancement device;

[0016] FIG. 8 illustrates one example of a back view of an airflow enhancement device;

[0017] FIG. 9 illustrates one example of a left side view of an airflow enhancement device;

[0018] FIG. 10 illustrates one example of a right side view of an airflow enhancement device;

[0019] FIG. 11 illustrates one example of a top view of an airflow enhancement device;

[0020] FIG. 12 illustrates one example of a bottom view of an airflow enhancement device.

[0021] The detailed description explains the preferred embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.DETAILED DESCRIPTION OF THE INVENTION

[0022] Heating, ventilation, and air conditioning (HVAC) systems are widely used to regulate environmental conditions in residential, commercial, and industrial spaces. In typical systems, conditioned air is delivered from ductwork into interior spaces through vent covers or registers. These vent covers commonly include simple grilles, slots, or flat louvers intended to direct airflow in a general direction. While perhaps effective for basic air delivery, such conventional vent designs often fail to optimize air distribution, air velocity, or circulation patterns within the occupied space. This inefficiency can result in uneven heating or cooling, formation of stagnant zones, extended run times to achieve target temperatures, and overall reductions in HVAC system performance.

[0023] Further complicating the problem is the fact that most passive vent covers are not designed to enhance airflow dynamics. They typically allow air to pass through with minimal modulation, resulting in laminar or turbulent discharge that quickly loses momentum. This unoptimized flow can cause poor mixing of conditioned air, leading to discomfort for occupants and unnecessary strain on HVAC equipment. In some cases, airflow irregularities at the vent opening can also lead to perceptible noise or vibration, further diminishing the user experience.

[0024] The present invention, as described and claimed herein, provides a novel airflow enhancement device that passively increases the velocity and coverage of HVAC air delivery without introducing powered components or complex mechanical assemblies. At the heart of the system is a passive vortex accelerator, a cylindrically shaped structure with a plurality of fixed, inwardly tapered fins arranged along its interior wall. These tapered fins are configured to induce a helical vortex pattern in the incoming airflow as it passes from the duct into the room. The resulting vortex increases both the momentum and directional control of the outgoing air, improving its reach and promoting more uniform air distribution throughout the environment.

[0025] Unlike known powered booster fans, the passive vortex accelerator achieves these improvements using entirely static geometry. In preferred embodiments, the accelerator is disposed within the central air channel of a vent cover, with its cylindrical axis oriented perpendicular to the plane of the vent. The passive fins are shaped and dimensioned to produce vortex flow with minimal pressure loss, allowing the device to operate without the need for external energy or mechanical actuation.

[0026] In certain embodiments, the vent cover is further configured with one or more directional louvers, such as central louvers positioned around the passive vortex accelerator or side louvers positioned along the lateral regions of the vent cover. These louvers may be fixed, adjustable, or a combination thereof, and are oriented to redirect a portion of the airflow upward, downward, leftward, or rightward as needed. This allows the device not only to enhance the overall strength of the airflow but also to shape it in ways that better address the unique airflow requirements of the conditioned space.

[0027] The airflow enhancement device can be fabricated from plastic, metal, or a combination of materials suitable for HVAC applications. It may be integrally molded into a vent cover or configured as a modular insert. Some embodiments are designed for direct replacement of existing vent covers, while others may be configured to mount over or within existing registers, enabling retrofit installation without requiring removal of the original fixture.

[0028] By integrating a passive vortex generator within a vent assembly and optionally combining it with directional louvers, the present invention solves long-standing challenges in HVAC airflow efficiency, comfort delivery, and noise management. The device provides a robust, scalable, and low-cost solution that enhances the effectiveness of existing HVAC systems while maintaining ease of installation and operation. The structural configuration of the airflow enhancement device also supports improved manufacturability and customization across a range of duct sizes and installation types.

[0029] In the present invention, the term “passive vortex accelerator” is intended to mean a non-powered, fixed-geometry cylindrical structure comprising one or more stationary fins arranged to induce a rotational or helical pattern in airflow as it passes through the structure.

[0030] In the present invention, the term“tapered fin” is intended to mean a fin that varies in radial dimension, width, thickness, or depth along its length to progressively influence the shape, direction, or velocity of airflow.

[0031] In the present invention, the term “central air channel” is intended to mean a region within the vent cover aligned with the axis of the passive vortex accelerator and configured to direct airflow received from the vortex accelerator into a conditioned space.

[0032] In the present invention, the term “side air channel” is intended to mean an airflow passage positioned laterally relative to the central air channel, and configured to receive and discharge airflow to the left or right side of the vent cover.

[0033] In the present invention, the term “central louvers” is intended to mean airflow directing structures located adjacent to or around the central air channel or passive vortex accelerator, and configured to influence the vertical or angled discharge of vortex-accelerated airflow.

[0034] In the present invention, the term “side louvers” is intended to mean airflow directing structures associated with the side air channels and configured to redirect airflow laterally to the left or right relative to the vent cover.

[0035] In the present invention, the term “ridge edging” is intended to mean a structural border formed along the perimeter of the vent cover, which can assist in sealing, vibration damping, alignment, or mechanical mounting.

[0036] In the present invention, the term “mounting holes” is intended to mean openings or apertures formed in the vent cover that enable attachment to a surface or duct using mechanical fasteners, adhesive, magnetic coupling, or other means.

[0037] In the present invention, the term “airflow enhancement device” is intended to mean a vent cover or register structure for use in an HVAC system, which includes one or more airflow-directing features configured to modify airflow characteristics such as velocity, direction, or distribution, without requiring powered components.

[0038] In the present invention, the term “removably coupled” is intended to mean a non-permanent connection between components that allows for manual separation, replacement, or reconfiguration without permanent tools or fasteners.

[0039] Turning now to the drawings in greater detail, it will be seen that in FIG. 1, there is illustrated one example of a front perspective view of an airflow enhancement device 100 configured for HVAC applications. In an exemplary embodiment, the airflow enhancement device 100 comprises a vent cover 112 having a front side exposed to a conditioned space and a back side that interfaces with an HVAC duct. The vent cover 112 defines multiple airflow regions, including a central air channel 110 and two opposing side air channels 104, each designed to route air in a spatially distributed manner across the room.

[0040] Centrally positioned within the vent cover 112 is a passive vortex accelerator 106, configured as a cylindrical body mounted with its central axis oriented substantially perpendicular to the plane of the vent cover 112. The passive vortex accelerator 106 includes a plurality of stationary, tapered fins 108 affixed to the interior surface of the cylindrical wall. As better illustrated in at least FIG. 6, the outer diameter 222 of the passive vortex accelerator 106 can range from 2.5 to 4.5 inches, with a more preferred diameter of approximately 3.8 inches, while the inner diameter 224 defines the core flow path. The height 236 of the cylindrical body can range from 2.5 to 5.0 inches, and the wall thickness 240 can be selected to balance structural rigidity with minimal flow obstruction.

[0041] Each fin 108 extends along the internal wall and defines a taper from a maximum fin length 238 near the inlet end to a minimum fin length 242 near the outlet. In this configuration, the fins induce a vortex motion in incoming air as shown by accelerated airflow 304, which exits the passive vortex accelerator 106 with increased velocity and angular momentum. The rotational airflow is spatially redirected into the room through the central air channel 110, where it may also be influenced by a series of central louvers 116, which direct the flow vertically as illustrated by airflow 308.

[0042] To either side of the central air channel 110, the vent cover 112 includes side air channels 104. Each side air channel is configured to receive a portion of incoming air and redirect it outward via side louvers 114, as shown by airflow 302. These side guides can be fixed or adjustable and are arranged to support lateral airflow extension, improving overall coverage. The width of each side air channel is defined by dimension 204 on the left and dimension 212 on the right. The height of the side air channels is better illustrated in at least FIGS. 7 as 226 and 232, respectively, which may be equal or varied depending on the airflow balancing strategy.

[0043] The spacing between features is defined with precision in FIG. 1. For example, the distance between the left side air channel 104 and the first side of the ridge edging 118 is shown as dimension 202, while the spacing between the left side air channel and the central air channel 110 is defined by dimension 206. On the opposite side, dimension 210 shows the gap between the right side air channel and the central channel 110, while dimension 214 shows the distance to the opposite side of the ridge edging 118. These measurements determine the layout symmetry and influence the airflow path geometry. As better illustrated in at least FIG. 7, additional spacing references, including dimensions 220, 228, 230, and 234, specify alternate distances between the side air channels and various ridge edging 118 boundaries, which may vary in alternate mounting configurations.

[0044] The central air channel width 218 defines the lateral span through which the vortex-accelerated air is discharged, ensuring alignment with the downstream fin guides. A vertical reference line 208 and a horizontal reference line 216 are also shown, centrally located on the vent cover 112 to establish geometric alignment across the components.

[0045] As better illustrated in at least Figure, the perimeter of the vent cover 112 includes, on the backside, a raised ridge edging 118, which forms a sealing and stabilizing interface between the vent cover and the mounting surface. This feature not only contains airflow but also helps to reduce mechanical vibration and noise. Along the sides of the ridge edging, multiple mounting holes 102 are provided, enabling secure installation using various fasteners, screws, adhesive, magnetic, or other suitable fasteners. These mounting holes 102 can be symmetrically spaced relative to the horizontal reference line 216 to simplify alignment during installation. Alternatively, the mounting holes 102 can be positioned in other locations on the surface of the vent cover 112, as may be required and / or desired in a particular embodiment.

[0046] The motion of airflow is shown in multiple stages. Airflow 306 enters from the HVAC system into the back side of the vent cover 112. Once inside, a portion of the air passes into the passive vortex accelerator 106, where the tapered fins 108 induce vortex acceleration, shown as airflow 304. This airflow is then discharged through the central air channel 110 and vertically redirected by the central louvers 116, forming airflow 308. Simultaneously, air is channeled into the left and right side air channels 104, redirected laterally by the side louvers 114, and discharged as airflow 302.

[0047] Finally, with reference to at least FIG. 5, reference 310 illustrates the motion of the passive vortex accelerator 106 as it is fitted into or removed from the vent cover 112. This highlights the modularity of the system and supports embodiments in which the vortex accelerator is removably coupled.

[0048] Altogether, the geometry, spacing, and integrated airflow control structures depicted in the Figures distinguish the airflow enhancement device 100 from prior vent designs. Instead of relying on static grille faces or flat louvers alone, the system of the present invention employs volumetric air modulation through internal acceleration and spatially coordinated discharge. The result is a low-energy, high-efficiency air delivery mechanism suitable for both new HVAC systems and retrofit applications.

[0049] In various embodiments, the airflow enhancement device 100 and its constituent components, including but not limited to the vent cover 112, passive vortex accelerator 106, tapered fins 108, side fin louvers 114, and central fin louvers 116, can be fabricated from a wide range of materials suitable for HVAC environments. These materials can include plastic, metal, wood, composite materials, other suitable materials, or combinations thereof.

[0050] Plastic materials such as ABS, polypropylene, or polycarbonate can be used for lightweight, cost-effective, and corrosion-resistant construction. Metal materials, including aluminum or stainless steel, can offer enhanced durability, rigidity, and thermal resistance in commercial or high-performance applications. In certain architectural or aesthetic contexts, wood or engineered wood products may be employed to match interior finishes or design requirements.

[0051] The selection of material for each component can vary based on manufacturing method, target use environment, thermal exposure, desired airflow characteristics, and user preference. In some embodiments, different materials can be combined, for example, a metal passive vortex accelerator 106 integrated into a plastic vent cover 112, to achieve a balance of performance, weight, and cost. Other suitable materials may be used as required or desired in a particular embodiment without departing from the scope of the present invention.

[0052] Referring to FIG. 2, there is illustrated one example of a backside perspective view of the airflow enhancement device 100, depicted from a forward angle that highlights the three-dimensional configuration of the vent cover 112, internal flow paths, and geometric design of airflow-regulating components. In an exemplary embodiment, the airflow enhancement device 100 comprises a vent cover 112 having a central air channel 110 and a pair of side air channels 104, each configured to direct conditioned air into a room from an HVAC duct.

[0053] At the core of the central air channel 110 is a passive vortex accelerator 106, a cylindrical insert mounted with its axis oriented substantially perpendicular to the plane of the vent cover 112. The cylindrical body includes a series of stationary, tapered fins 108 affixed to its inner surface, with each fin tapering from a maximum fin length 238 near the inlet end to a minimum fin length 242 near the outlet. In an exemplary embodiment, the cylindrical body is defined by an outer diameter 222 and an inner diameter 224, with a vertical height 236 that matches or exceeds the axial length of the tapered fins 108. The wall thickness 240 can be selected to provide rigidity while allowing smooth airflow transition. In an exemplary embodiment, wall thickness 240 can be in the range of 0.05 to 0.25 inches, and preferrable approximately 0.12 inches.

[0054] Incoming air 306 from the HVAC system enters through the backside of the vent cover and is directed into the passive vortex accelerator 106. As it passes over the tapered fins 108, the air is transformed into a vortex motion, exiting the cylindrical body as accelerated airflow 304. This flow is then guided through the central air channel 110 and is optionally redirected upward or downward by central louvers 116, shaping airflow 308 into a vertical discharge that enhances room-level mixing and thermal reach.

[0055] On either side of the central vortex outlet are side air channels 104, each bordered by side louvers 114 that direct lateral airflow (shown as airflow 302) leftward and rightward relative to the vent cover 112. The width of the side air channels is defined by dimensions 204 and 212, and their heights are specified as 226 and 232, respectively. These channels are separated from the central air channel by spacings 206 (left) and 210 (right), and the distance from each side air channel to the ridge edging 118 is specified by dimensions 202, 214, 220, 228, 230, and 234, depending on the reference edge.

[0056] The width of the central air channel 110 is designated by dimension 218, and both the horizontal reference line 216 and vertical reference line 208 are illustrated to define the spatial symmetry of the vent cover 112. These reference lines ensure proper mounting alignment and support use in both centered and offset HVAC duct layouts.

[0057] From this angle, the role of the ridge edging 118 as a vibration dampener and air-sealing perimeter is more clearly visible. It surrounds the outer edges of the vent cover 112 and isolates the mounting interface from airflow-induced movement. Also shown are mounting holes 102, located symmetrically along the sides of the vent cover 112. These holes are sized and positioned to receive standard HVAC screws or other fastening mechanisms for direct or retrofit installation.

[0058] In operation, airflow 306 approaches the backside of the vent cover from the HVAC system, and is distributed along the central vortex path 304, side air channels 302, and central channel 308 accordingly.

[0059] Referring to FIG. 3, there is illustrated one example of a backside perspective view of the airflow enhancement device 100, emphasizing the symmetrical architecture, channel geometry, and multi-axis airflow modulation. In an exemplary embodiment, the airflow enhancement device 100 comprises a vent cover 112 configured to be installed over an HVAC duct outlet, enabling multidirectional delivery of conditioned air into a surrounding room.

[0060] With reference to FIGS. 1 and 3, the figures clearly show the device's three distinct airflow outlets: a central air channel 110 positioned along the vertical reference line 208, and a pair of laterally offset side air channels 104 situated equidistantly to either side. These outlet channels are separated and defined by precise spacing dimensions. On the left side, the distance between the side air channel 104 and the ridge edging 118 is indicated by dimension 202, while the gap between the side and central channels is defined by dimension 206. The right side reflects corresponding spacings through dimensions 210 and 214. The total width of the central air channel 110 is labeled as dimension 218, and the widths of the left and right side air channels are shown as dimensions 204 and 212, respectively.

[0061] Mounted within the central air channel 110 is a passive vortex accelerator 106, which defines a cylindrical airflow module with an outer diameter 222, inner diameter 224, and height 236. Within the cylinder, a plurality of tapered fins 108 is affixed to the inner surface. Each fin extends vertically and tapers in radial depth from a maximum fin length 238 at the inlet end to a minimum fin length 242 near the outlet. These fixed fins are positioned to convert axial duct airflow into a vortex flow 304, which exits the accelerator and enters the central air channel 110 with enhanced velocity and rotational momentum.

[0062] Positioned above and below the passive vortex accelerator 106 are central louvers 116, which redirect the accelerated flow either upward or downward, as illustrated by airflow 308. This feature allows the vortex output to be tailored to the vertical needs of the space, such as directing airflow toward the ceiling for stratified mixing or downward for direct occupant cooling. The vertical redirection complements the lateral airflow 302, which is generated by side air channels 104 and redirected by side louvers 114 into leftward and rightward trajectories. The heights of the side air channels are labeled as dimensions 226 and 232, allowing them to match or differ depending on the intended lateral balance.

[0063] From this viewing angle, the wall thickness 240 of the passive vortex accelerator 106 can be more easily appreciated, forming the structural boundary that supports the internal fin array while maintaining aerodynamic flow continuity. The motion 310 of the vortex accelerator as it is installed into or removed from the vent cover 112 is also referenced, illustrating the system's modularity and supporting configurations in which the vortex accelerator is removably coupled for maintenance or customization.

[0064] The ridge edging 118 surrounds the perimeter of the vent cover 112 and provides a compressive interface for flush installation. The ridge acts to both reduce vibrational resonance and limit unintentional air leakage around the unit. The mounting holes 102, symmetrically arranged along both sides of the ridge edging, allow the airflow enhancement device 100 to be securely fastened to the ceiling or wall duct openings using conventional hardware.

[0065] Collectively, the geometry shown in FIG. 3 illustrates how the airflow enhancement device 100 achieves a multidimensional airflow profile through fully passive means. Air enters the back side of the vent cover as airflow 306, is transformed into vortex flow through the passive vortex accelerator 106 as airflow 304, and is then redirected either vertically by the central louvers 116 or laterally by the side louvers 114 into airflow paths 308 and 302, respectively.

[0066] This configuration improves upon prior designs by combining three-axis airflow modulation, vortex acceleration, and installation-ready mounting features into a unified system. The device is especially well-suited for both new HVAC installations and retrofits, offering enhanced room air distribution, faster temperature equalization, and reduced noise, without requiring motors, dampers, or powered fans.

[0067] Referring to FIG. 4, there is illustrated a front side perspective view of the airflow enhancement device 100, with a focus on alignment symmetry, flow path organization, and the structural coherence between its airflow control features. In an exemplary embodiment, the airflow enhancement device 100 comprises a vent cover 112 configured to receive airflow 306 from an HVAC duct on its back side and redirect that airflow into a room environment through a structured assembly of internal airflow paths.

[0068] The device includes a central air channel 110 flanked by a pair of side air channels 104. These elements are precisely positioned around a central vertical reference line 208 and balanced across a horizontal reference line 216, which ensures proper placement and symmetry during manufacturing and installation. The width of the central air channel 110 is defined by dimension 218, while the widths of the left and right side air channels 104 are shown as dimensions 204 and 212, respectively. The spacing between the central and side channels is referenced by dimensions 206 and 210, and the outer separation from the ridge edging 118 is marked by dimensions 202, 214, 220, 228, 230, and 234.

[0069] Centrally positioned in the central air channel 110 is the passive vortex accelerator 106, a cylindrical airflow element aligned perpendicular to the vent cover face. The outer diameter 222, inner diameter 224, and height 236 define the physical bounds of the vortex accelerator. Within the cylinder, a series of stationary tapered fins 108 are affixed to the inner wall. Each fin tapers from a maximum tapered fin 108 length 238 at the intake to a minimum fin length 242 at the discharge point, and is spaced evenly around the interior circumference. These fins convert linear duct airflow into accelerated vortex airflow 304, which exits the accelerator in a spiraling trajectory.

[0070] The vertical discharge is subsequently redirected by central louvers 116, which shape airflow 308 either upward or downward relative to the vent cover surface. These guides are arranged around the outlet of the vortex accelerator to optimize throw angle and dispersion profile. In this view, their position and curvature can be appreciated in context with the outlet of the cylindrical core.

[0071] Also shown are the side louvers 114, which are vertically oriented and placed adjacent to the side air channels 104. These guides receive a portion of the incoming airflow 306, and redirect it laterally outward as airflow 302. The height 226 and height 232 of the left and right side air channels, which can be the same height or different heights depending on configuration, define the extent of vertical airflow shaping, which contributes to uniformity in room coverage, particularly near wall edges or furniture zones.

[0072] The ridge edging 118 is shown running continuously along the outer boundary of the vent cover 112. This structural feature not only supports sealing and vibration dampening, but also frames the integrated mounting locations. The mounting holes 102 are visible along the side edges and are aligned relative to the horizontal reference line 216 for straightforward installation using screws, adhesive, or magnetic mounting elements.

[0073] This figure also captures motion 310, indicating the removable insertion or replacement of the passive vortex accelerator 106 into the vent cover 112. This supports configurations where the accelerator is not permanently fixed, allowing maintenance, customization, or retrofit interchangeability. The wall thickness 240 of the vortex accelerator defines its rigidity and helps maintain flow integrity across varied HVAC pressure regimes.

[0074] In combination, the spatial arrangement of airflow channels, redirection elements, and dimensional tolerances illustrates how the airflow enhancement device 100 forms a compact but highly engineered system. Unlike conventional vent covers that simply release air through planar slots or static vanes, the present device introduces structured vortex generation, multi-axis airflow modulation, and removable modular components that enhance airflow efficiency and occupant comfort while maintaining ease of installation and low maintenance overhead.

[0075] Referring to FIG. 5, there is illustrated one example of a passive airflow enhancement device 100 in both an exploded assembly view (reference ‘A’) and a fully assembled configuration (reference ‘B’). These views demonstrate the modular architecture and assembly sequence of the core components, including the passive vortex accelerator 106, the vent cover 112, and the integrated airflow shaping features that enable multi-directional air delivery.

[0076] In reference ‘A’, the passive vortex accelerator 106 is shown separated from the vent cover 112 to illustrate the modular nature of the assembly. The passive vortex accelerator 106 comprises a cylindrical housing with a defined outer diameter 222, inner diameter 224, and wall thickness 240, enclosing a plurality of stationary, tapered fins 108. Each tapered fin 108 extends vertically and tapers in radial dimension from a maximum fin length 238 to a minimum tapered fin 108 length 242, forming a spiraling internal structure configured to generate vortex airflow 304 when air is forced through the cylinder.

[0077] The motion 310 of the passive vortex accelerator 106 being inserted into the central air channel 110 of the vent cover 112 is illustrated with directional arrows. This fitting motion reflects one embodiment in which the vortex accelerator is removably coupled to the vent cover, allowing for cleaning, replacement, or substitution of vortex modules with different performance characteristics. When inserted, the cylindrical body of the vortex accelerator aligns along the vertical reference line 208 and seats into the central region of the vent cover 112. The height 236 of the vortex accelerator can match the depth of the central air channel 110, ensuring that the airflow remains well-contained and centered during operation.

[0078] The vent cover 112 includes lateral side air channels 104, each separated from the central channel by spacing dimensions 206 and 210, and bordered by ridge edging 118. Mounting holes 102 are positioned near the edges, aligned relative to the horizontal reference line 216, and allow the entire assembly to be mounted to an HVAC opening using conventional fasteners. The heights of the side air channels are indicated as 226 and 232, while the widths 204 and 212 define the lateral span of airflow permitted through the left and right air channels, respectively.

[0079] In reference ‘B’, the airflow enhancement device 100 is shown in its assembled state, with the passive vortex accelerator 106 fully inserted and all visible air channels aligned for operation. The central cylindrical body receives airflow 306 from the back side of the device. As this airflow passes through the internal tapered fins 108, it is transformed into a spiraling, accelerated vortex 304, which exits forward into the central air channel 110 and is then redirected as airflow 308 by the surrounding central louvers 116. Simultaneously, a portion of the incoming air is routed into the side air channels 104 and laterally discharged as airflow 302, shaped by the side louvers 114.

[0080] This figure underscores the functional and spatial integration of the airflow enhancement device 100. In contrast to traditional one-piece vent grilles or diffuser plates, the illustrated embodiment enables airflow transformation and redirection using a removable core module and fixed outer frame. This modularity simplifies service, allows future upgrades, and permits production variants to be tailored to specific flow characteristics, duct pressures, or room configurations.

[0081] Referring to FIG. 6, there is illustrated one example of a passive vortex accelerator 106 as used within the airflow enhancement device 100. In an exemplary embodiment, reference ‘A’ shows a perspective view of the passive vortex accelerator 106, while reference ‘B’ presents a front view looking directly into the vortex-forming structure. These views reveal the geometric features and internal airflow-shaping components that define the accelerator's function.

[0082] In reference ‘A’, the cylindrical body of the passive vortex accelerator 106 is shown oriented with its axis vertically aligned. The body includes an outer diameter 222, an inner diameter 224, and a defined wall thickness 240, which together form a hollow structure that directs incoming airflow along its central axis. Affixed to the inner wall surface are a plurality of tapered fins 108, each extending substantially the full height of the cylinder (height 236).

[0083] Each tapered fin 108 is dimensioned with a radial taper from a maximum tapered fin 108 length 238 at the rear (air entry) end to a minimum tapered fin 108 length 242 at the front (air discharge) end. The tapered fins 108 are evenly spaced around the inner circumference of the cylindrical body, defining a vortex-generating structure that spirals and accelerates airflow as it travels from the inlet to the outlet. The internal spacing, taper angles, and height of the tapered fins are selected to induce a consistent and centered vortex flow 304 when the accelerator is exposed to airflow from the HVAC system.

[0084] In reference ‘B’, a front view of the passive vortex accelerator 106 is shown. This perspective provides a clear view into the cylindrical body along the flow axis. The openings between adjacent tapered fins 108 form angular air passages, each contributing to the rotational acceleration of incoming airflow. The symmetrical distribution of the fins supports balanced vortex formation and consistent output characteristics. The inner diameter 224 defines the open flow region at the center, while the spacing between the outer wall and fin structure is bounded by the outer diameter 222.

[0085] In operation, the passive vortex accelerator 106 is designed to receive airflow 306 from the rear side of the vent cover and convert it into an accelerated, spiraling discharge 304. This vortex output is then directed into the central air channel 110 of the airflow enhancement device 100, where it may be further shaped by central louvers 116. The self-contained structure of the accelerator allows it to be removably inserted (310) into the vent cover housing, as shown in prior figures, supporting modularity and serviceability.

[0086] The features shown in FIG. 6 distinguish the passive vortex accelerator 106 from basic diffuser inserts or flat-louver devices. Instead of allowing unmodulated airflow to pass through the vent cover, this component introduces structured aerodynamic shaping that enhances throw, reduces thermal stratification, and improves air mixing throughout the space, all without requiring powered elements or moving parts.

[0087] Referring to FIG. 7, there is illustrated one example of a front view of the airflow enhancement device 100. In an exemplary embodiment, this view reveals the overall geometry, structural alignment, and dimensional layout of the vent cover 112, as seen from the room-facing side. The figure emphasizes the symmetrical positioning of the air channels, guides, and mounting features along both a vertical reference line 208 and a horizontal reference line 216, which define the visual and functional centerlines of the device.

[0088] Centrally located is the central air channel 110, bordered on either side by a pair of side air channels 104. The width of the central air channel is labeled as dimension 218, while the widths of the left and right side air channels are labeled as dimensions 204 and 212, respectively. The vertical height 226 of the left side air channel and height 232 of the right side air channel define their vertical span and can be equal or asymmetrical depending on the desired airflow distribution.

[0089] Spacing between key elements is also highlighted. The distance between the left side air channel 104 and the ridge edging 118 is shown as dimension 202, while the space between the left side air channel and the central air channel is marked as dimension 206. On the opposite side, dimension 210 represents the gap between the right side air channel 104 and the central air channel 110, and dimension 214 shows the distance to the right ridge edge. Additional lateral distances are shown as dimensions 220, 228, 230, and 234, which define alternate ridge edging 118-to-channel 104 clearances along the left and right perimeters.

[0090] Mounted within the central air channel 110 is the passive vortex accelerator 106, visible through its front opening. The circular opening represents the inner diameter 224, while the housing perimeter corresponds to the outer diameter 222. The internal tapered fins 108 are partially visible from this angle, each extending radially inward to form spiraling air pathways. These fins convert axial duct airflow into vortex airflow 304, discharged forward through the central air channel 110.

[0091] Positioned around the outlet of the passive vortex accelerator 106 are central louvers 116, configured to deflect the vortex stream either upward or downward, depending on installation orientation and user preference. Flanking the side air channels are side louvers 114, which are vertically oriented and configured to redirect airflow laterally as shown in prior figures (e.g., airflow 302). These guides are designed to provide both minimum baseline redirection and optional user-adjustable modulation.

[0092] The perimeter of the vent cover 112 includes the raised ridge edging 118, which surrounds the airflow assembly and supports vibration isolation, visual containment, and airflow sealing against adjacent ceiling or wall surfaces. Distributed symmetrically along the sides of the ridge edging are multiple mounting holes 102, which allow the airflow enhancement device 100 to be secured using screws or other fasteners.

[0093] This front view illustrates the structured, modular design of the device, in contrast to flat-faced or open-louvered registers. Through the central vortex accelerator, dimensional spacing, and multi-directional fin guides, the airflow enhancement device 100 transforms incoming HVAC airflow into a structured and spatially distributed discharge that improves comfort, thermal reach, and air circulation within the conditioned space.

[0094] Referring to FIG. 8, there is illustrated one example of a backside view of the airflow enhancement device 100, as seen from the HVAC duct-facing side. In an exemplary embodiment, this view emphasizes the airflow entry geometry, mounting alignment, and rearward access to key structural components.

[0095] The vent cover 112 includes a rear opening aligned with the central air channel 110, into which the passive vortex accelerator 106 is installed. The cylindrical housing of the vortex accelerator 106 is visible from this angle, with the back ends of the tapered fins 108 forming the airflow intake zone. Incoming airflow 306 from the HVAC system is received directly into this rear opening and routed through the vortex-forming structure.

[0096] Also shown are the side air channels 104, visible in partial profile on either side of the central channel. From this angle, the ridge edging 118 fully frames the outer perimeter of the vent cover 112, forming a boundary for airflow containment and mechanical mounting. In an exemplary embodiment, the mounting holes 102 are symmetrically spaced along both lateral sides and are visible in this rear perspective as entry points for fasteners or clips.

[0097] This view illustrates how the passive airflow enhancement system is designed to receive axial duct airflow and immediately introduce vortex modulation and multi-axis redirection before discharging into the room-facing side.

[0098] Referring to FIG. 9, there is illustrated one example of a left side view of the airflow enhancement device 100.

[0099] Referring to FIG. 10, there is illustrated one example of a right side view of the airflow enhancement device 100. In an exemplary embodiment, this view is a mirror image of the configuration shown in FIG. 9.

[0100] Referring to FIG. 11, there is illustrated one example of a top view of the airflow enhancement device 100.

[0101] Referring to FIG. 12, there is illustrated one example of a bottom view of the airflow enhancement device 100.

[0102] While the preferred embodiment of the invention has been described, it will be understood that those skilled in the art, both now and in the future, may make various improvements and enhancements which fall within the scope of the claims which follow. These claims should be construed to maintain the proper protection for the invention first described.

Claims

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; anda 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; anda 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.

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