BACKGROUND
Destratification is the reverse of the natural process of thermal stratification, which is the layering of differing (typically increasing) air temperatures from floor to ceiling. Stratification is caused by hot air rising up to the ceiling or roof space because it is lighter than the surrounding cooler air. Conversely, cool air falls to the floor as it is heavier than the surrounding warmer air.
In a stratified building, temperature differentials of up to 1.5° C. per vertical foot is common, and the higher a building's ceiling, the more extreme this temperature differential can be. In extreme cases, temperature differentials of 10° C. have been found over a height of 1 meter. Other variables that influence the level of thermal stratification include heat generated by people and processes present in the building, insulation of the space from outside weather conditions, solar gain, specification of the HVAC system, location of supply and return ducts, and vertical air movement inside the space, usually supplied by destratification fans.
In a study conducted by the Building Scientific Research Information Association, the wasted energy due to stratification increased consistently based on temperature differential from floor to ceiling (ΔT). The study indicates that stratified buildings tend to overheat or overcool based on the temperature at the thermostat, which tends to be lower than the overall heat energy present in the room. The study also showed that energy waste due to stratification was present at ceiling heights ranging from 20 ft. to 40 ft, and higher ceilings caused higher energy waste, even at the same ΔT. Since ΔT tends to be higher in taller ceilings, the effect of stratification is compounded, causing substantial energy waste in high-ceiling buildings.
Therefore, it would be highly advantageous to remedy the deficiencies inherent in the prior art. Accordingly, it is an object of the present invention to enhance a ceiling fan with sufficient vertical air movement to affect an air temperature gradient between the top and bottom of a room in which the fan is located.
SUMMARY
In accordance with the invention, a ceiling fan adapter assembly is provided which improves the flow of air in a space by a ceiling fan having a plurality of fan blades. Generally, the ceiling fan adapter assembly includes a shroud; a directing grid attached to the shroud at a lower end thereof, the directing grid comprising a plurality of intersecting members to reduce cross-sectional flow area creating a venturi effect; and a mounting assembly for supporting the shroud radially outwardly from the plurality of fan blades.
In certain versions of the application, the ceiling fan adapter assembly comprises a plurality of connecting equal radial sections. Preferably, the plurality of connecting equal radial sections are radial quarter-sections.
In a version, the connecting equal radial sections form a wedge shape, each section may comprise: a partial shroud having a radial wall having an upper perimeter and a lower perimeter; a front point; a first and second radial perimeters extending radially outward from the front point; and at least one bracket vertically attached to a side of the radial wall for attachment to a reciprocal connecting radial section partial shroud; wherein the lower perimeter, first radial perimeter, and the second radial perimeter form an outer perimeter of the directing grid, wherein the upper perimeter provides a horizontal lip extending outward.
In certain versions of the application, a radial spacer ring assembly may be provided for assisting airflow for smaller diameter fans as the air approaches the directing grid. Generally, the radial spacer ring assembly comprises: a radial wall and a plurality of radially outward extending tabs configured to attach to the upper lip of the shroud.
In some versions of the application, the radial spacer ring assembly is constructed of a plurality of connecting equal radial sections. Preferably, the plurality of radial interior sections are radial quarter-sections.
These and other features of the present invention will become readily apparent upon further review of the following specification and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description and accompanying figures where:
FIG. 1 is an elevation view of a version of the ceiling fan adapter shown while connected to a ceiling fan;
FIG. 2 is side perspective view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 3 is a bottom perspective view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 4 is a top plan view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 5 is a bottom plan view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 6 is a first side elevation view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 7 is a second side elevation view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 8 is a third side elevation view of the shroud and directing grid of the version shown in FIG. 1;
FIG. 9 is a side perspective view of the radial quarter-section of the ceiling fan adapter;
FIG. 10 is a top plan view of the radial quarter-section of the ceiling fan adapter shown in FIG. 9;
FIG. 11 is a bottom plan view of the radial quarter-section of the ceiling fan adapter shown in FIG. 9;
FIG. 12 is an interior elevation view of the radial quarter-section of the ceiling fan adapter shown in FIG. 9;
FIG. 13 is a side elevation view of the radial quarter-section of the ceiling fan adapter shown in FIG. 9;
FIG. 14 is an exterior side elevation view of the radial quarter-section of the ceiling fan adapter shown in FIG. 9;
FIG. 15 is an interior elevation view of the radial quarter-section of the ceiling fan adapter shown in FIG. 9;
FIG. 16 is a top perspective view of a version of a radial spacer ring assembly;
FIG. 17 is an elevation view of the radial spacer ring assembly shown in FIG. 16;
FIG. 18 is a perspective view of a radial section of the radial spacer ring assembly shown in FIG. 16;
FIG. 19 is a top plan view of a radial section of the radial spacer ring assembly shown in FIG. 16;
FIG. 20 is a side perspective view of a version of the ceiling fan adapter having a radial spacer ring assembly;
FIG. 21 is a top plan view of a version of the ceiling fan adapter having a radial spacer ring assembly;
FIG. 22 is a top plan view of a radial section of a radial spacer ring assembly attached to a section of the shroud and directing grid;
FIG. 23 is a bottom plan view of a radial section of the radial spacer ring assembly shown in FIG. 16;
FIG. 24 is a side elevation view of a radial section of the radial spacer ring assembly shown in FIG. 16;
FIG. 25 is a top plan view of the version of the ceiling fan adapter;
FIG. 26 is a detail view taken from detail C of FIG. 25;
FIG. 27 is a side elevation view of the version of the ceiling fan adapter shown in FIG.
FIG. 28 is a detail view taken from detail B of FIG. 27;
FIG. 29 is a side elevation view of the version of the ceiling fan adapter shown in FIG. 25;
FIG. 30 is a detail view taken from detail D of FIG. 29;
FIG. 31 is a detail view taken from detail E of FIG. 29;
FIG. 32 is a top plan view of a version of the radial quarter-section of the ceiling fan assembly;
FIG. 33 is a detail view taken from detail F of FIG. 32;
FIG. 34 is a top plan view of a version of the radial quarter-section of the radial spacer ring assembly;
FIG. 35 is a side elevation view of the radial quarter-section of the radial spacer ring assembly;
FIG. 36 is a top plan view of the down rod coupler of the mounting assembly;
FIG. 37 is a side elevation view of the down rod coupler of the mounting assembly shown in FIG. 36;
FIG. 38 is a side elevation view of the hang arm of the mounting assembly; and
FIG. 39 is a top plan view of the hang arm of the mounting assembly shown in FIG. 38.
DETAILED DESCRIPTION
The following detailed description is of the best currently contemplated modes of carrying out exemplary versions of the invention. The description is not to be taken in the limiting sense but is made merely for the purpose of illustrating the general principles of the invention, since the scope of the invention is best defined by the appended claims.
Various inventive features are described below that can each be used independently of one another or in combination with other features.
Referring now to the figures wherein the showings are for purposes of illustrating a preferred version of the invention only and not for purposes of limiting the same, the present invention is a ceiling fan adapter assembly 100 for improving the flow of air in a space by a ceiling fan 200 having a plurality of blades 202 extending a radial distance R from a centerline thereof.
By way of operation, the ceiling fan adapter assembly 100 attaches securely below an existing industrial ceiling fan 200, preferably either 48″ or 56″ fans. The ceiling fan 200 moves room air through the tapered sides of the ceiling fan adapter assembly 100 and then through the directing grid 104 which adds velocity to the air flow. When the air reaches the floor, it spreads horizontally before rising again to the ceiling. This continuous cycling pulls the air from the highest ceiling space, mixes it with the air at the floor level and eliminates temperature stratification in both heating and cooling modes. Testing has shown up to a 30% reduction in energy consumption while heating a building and a 20% reduction while cooling.
With reference to FIG. 1-FIG. 8, a general description of a version of the invention will be provided. Generally, a version of the ceiling fan adapter assembly 100 comprises a shroud 102 and a directing grid 104 attached to the shroud 102. The shroud 102 provides an upper perimeter 106 having a first diameter D1 and a lower perimeter 108 having a second D2. The directing grid 104 is preferably coupled at or near the lower perimeter 108. The directing grid 104 comprises a plurality of intersecting members to reduce cross-sectional flow area, thereby causing the rate of airflow to increase by way of the Venturi effect. Further, a mounting assembly 105 is provided to position the shroud 102 laterally about the ceiling fan 200 blades 202 and position the directing grid 104 below the blades 202, perpendicular to the flow of air.
With reference to FIG. 1, in a detailed version of the application, a ceiling fan 200 is shown comprising a plurality of blades 202, a motor 204, and a drive shaft providing rotation to the blades 202 from the motor 204. Further, a down rod 208 extends from the ceiling C to the motor 204 and blades 202 serving the purpose of suspending the ceiling fan 200 away from the ceiling C and providing a conduit through which the electrical supply is communicated.
FIG. 6-FIG. 8 are elevation side views of the shroud 102. In the exemplary embodiment, the shroud 102 is positioned around, and laterally adjacent to, the blades 202. In some versions of the invention, the shroud 102 is cylindrical having a vertical wall, with an upper perimeter 106, having an equal diameter D1 as the lower perimeter 108 diameter D2. In the preferred illustrated version, however, the upper perimeter 106, diameter D1 is greater in diameter than the lower perimeter 108, diameter D2 forming a cone or frustoconical radial wall 103 which causes an increase in the speed of the airflow from the ceiling fan 200 to the directing grid 104 by reducing the cross-sectional area. Naturally, the first and second diameters D1 and D2 will be greater than the diameter of the existing ceiling fan 200 blades 202. Preferably, D1 is at least 50 inches, more preferably 51.5 inches and D2 is at least 55 inches, more preferably 56.25 inches. Preferably, the height H of the shroud 102 is at least 5 inches, preferably 8 inches. Preferably, the outward angle T formed between the frustoconical radial wall 103 and the plane of the directing grid is between 75 degrees and 85 degrees, more preferably between 79 degrees to 82 degrees (See FIG. 29).
With reference to FIG. 29-FIG. 31, the directing grid 104 is constructed of a plurality of intersecting members 150 along a horizontal plane. The plurality of intersecting members 150 form a plurality of channels 152 which narrow in cross-sectional area from a fan side (upstream) to a floor side (downstream). Preferably, the plurality of channels 152 have a rectangular cross-section formed between at least two opposing walls 154a, 154b. In certain versions, the angle Z formed between the first and second wall is preferably between 8-12 degrees, most preferably 10 degrees (See FIG. 31).
As best shown in FIG. 9-FIG. 15, the ceiling fan adapter assembly 100 may be constructed of a plurality of connecting equal radial sections 110. Preferably, as shown, four equal radial quarter-sections 110 are provided. Each radial quarter-section 110 forms a wedge shape and is configured to connect and interlock with an adjacent radial quarter-section 110 in order to completely encompass an existing ceiling fan 200. Generally, each radial quarter-section 110 comprises a partial shroud 112 having an upper perimeter 114 and a lower perimeter 116 and a directing grid section 118 forming a wedge. The directing grid section 118 comprises a front point 120, a first and second radial perimeters 122, 124 extending radially outward from the front point 120 to the opposing ends of the partial shroud 112.
In the illustrated version, the upper perimeter 114 of each partial shroud 112 incorporates a horizontal lip 126 extending outward providing a mounting assembly 115 connection surface.
As best illustrated in FIG. 9 and FIG. 34, in certain versions of the application, at least one bracket 128 is utilized in order to connect adjacent radial quarter-sections 110 by way of adjacent partial shrouds 112. As shown in FIG. 2, in a version, four brackets 128 are utilized in order to assemble all four radial quarter-sections 110 to form the complete ceiling fan adapter assembly 100.
In certain versions of the application as shown in FIG. 16-FIG. 24, the ceiling fan adapter assembly 100 further includes a radial spacer ring assembly 300 which is positioned interior of the radial shroud 102. The radial spacer ring assembly 300 generally functions to assist airflow direction and velocity from the ceiling fan 200 to the directing grid 104 for a reduced sized ceiling fan 200, for example, a 48″ diameter ceiling fan assembly.
Generally, the radial spacer ring assembly 300 comprises a radial wall 303 having an upper perimeter 304 having a first diameter D1 and a lower perimeter 306 having a second diameter D2. Preferably, the upper perimeter 304 first diameter is larger than the lower perimeter 306 second diameter D2 forming a frustoconical shape in order to increase the velocity of the airflow from the ceiling fan 200 blades 202 to the directing grid 104 (See FIG. 17). However, other versions may provide a vertical radial wall or a curved radial wall.
Preferably, the outward angle L formed between the radial wall 303 forms an outward angle with the plane of the directing grid 104 is between 75 degrees and 85 degrees, more preferably between 79 degrees to 82 degrees (See FIG. 35). In certain versions, the outward angle T of the shroud 102 is equal to the outward angle L of the radial spacer ring assembly 300. Preferably, the height H of the radial wall is at least 5 inches, preferably 7.25 inches.
Further, the radial spacer ring assembly 300 may include a plurality of radially outward extending tabs 308 configured to attach to the horizontal lip 126 of the shroud 102, thereby centrally supporting the radial spacer ring assembly 300 to and within the ceiling fan adapter assembly 100.
As best shown in FIG. 18-FIG. 22, the radial spacer ring assembly 300 is provided in a plurality of connecting equal radial sections 302. Preferably, as shown, four equal radial quarter-sections 302 are provided. Each radial quarter-section 302 forms a semi-circular shape and is configured to connect and interlock with an adjacent radial quarter-section 302 in order to completely encompass an existing ceiling fan 200. Generally, each radial quarter-section 302 comprises a partial radial wall 303p having an upper perimeter 304p and a lower perimeter 306p.
In a version, as shown best in FIG. 22, each radial section 302 provides three radially outward extending tabs 308, a primary tab 308c centrally positioned along the upper perimeter 304p and a first and second reciprocal partial tabs 308p located at opposing ends of the upper perimeter 304. The first and second partial tabs 308p are configured to mate with an adjacent partial tab 308p of a second radial section 302 to form a complete tab 308 (See FIG. 20).
FIG. 21 depicts an assembled version of the ceiling fan adapter assembly 100 including a radial spacer ring assembly 300. In the version, the attachments seams 340 and tabs 308 of the radial spacer ring assembly 300 are offset the attachment seams 190 of the ceiling fan adapter assembly 100 in order to provide superior strength in construction.
As best shown in FIG. 1, FIG. 36-FIG. 39, the mounting assembly 105 is operably configured to attach the shroud 102 to the fan down rod 208 providing support to the ceiling fan adapter assembly 100 (See FIG. 1). The mounting assembly generally attaches to the shroud 102 at a plurality of points about the upper perimeter 106. Preferably, the mounting assembly 105 comprises a down rod coupler 400 and a plurality of hang arms 402 which extend downward from the down rod coupler 400 at a 45 degree angle to the upper perimeter 106 of the shroud 102.
As shown best in FIG. 36 and FIG. 37, the down rod coupler 400 is comprised of two reciprocal connecting parts 404a, 404b that when connected sandwich the down rod 208. The connecting parts 404a, 404b each provide at least two downward extending connection platforms 406, 408 for support and connection of each respective hang arm 402. With reference to FIG. 38 and FIG. 39, the hang arm 402 comprises an upper end 410 which operably fastens to a respective connection platform 406, 408 and an angled lower end 412 which connects with the shroud 102, radial wall 103 (See FIG. 1).
In other embodiments, the ceiling fan adapter assembly 100 may further include a safety cable, preferably manufactured of steel. The safety cable attaches and secures to all major components of the ceiling fan adapter including the shroud 102, the directing grid 104, and the radial spacer ring assembly 300 to an anchor point such as a ceiling joist.
The invention does not require that all the advantageous features and all the advantages need to be incorporated into every version of the invention.
Although preferred embodiments of the invention have been described in considerable detail, other versions and embodiments of the invention are certainly possible. Therefore, the present invention should not be limited to the described embodiments herein.
All features disclosed in this specification including any claims, abstract, and drawings may be replaced by alternative features serving the same, equivalent or similar purpose unless expressly stated otherwise.
Patent Application
20240011503
