Abstract:
A system for incorporating a humidifier into a vertical fan coil unit mounting a humidifier on the upper section of a fan coil unit; providing a fresh water inlet to said humidifier; and providing an outlet from the humidifier configured such that steam is incorporated into the outlet air stream of the fan coil.

Description:
INDEX TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/976,011 filed Sep. 28, 2007 the disclosure of which is incorporated by reference in its entirety. 
     
    
     BRIEF SUMMARY OF THE INVENTION 
       [0002]    The present invention is a system for incorporating a humidifier into a vertical fan coil unit comprising:
       a. mounting a humidifier on the upper section of a fan coil unit;   b. providing a fresh water inlet to said humidifier; and   c. providing an outlet from said humidifier configured such that steam is incorporated into the outlet air stream of the fan coil.       
 
         [0006]    The system has a humidifier and/or steam generation unit and at least one steam dispersion outlet extending from said humidifier and/or steam generation unit. The steam dispersion outlet may be steam emitting nozzles or at least one steam dispersion tube. In one embodiment, the system includes an appropriate sensor to measure ambient indoor humidity and generating steam as needed to maintain the ambient humidity between about 25-50%. 
         [0007]    The steam generator ceases to operate if ambient humidity is over about 50% and operates if the ambient humidity drops below about 25%. 
         [0008]    The present invention provides for a system having a humidification unit incorporated in a typical vertical fan coil or vertical heat pump. The humidifier is mounted within the existing vertical fan coil housing and will have at least one steam generator and at least one steam dispersion device. Additionally, the humidifier will have a fresh water supply as the starting material for producing steam. In one embodiment, a fresh water supply may further comprise an in-line filter such that the unit provides steam that is generally free of particulate. 
         [0009]    The system of the present invention further comprises at least one sensor for detecting ambient humidity in the air space cooled or heated by the existing air conditioning and or heating system. The measuring of ambient humidity may be by any means currently known in the art. The transmission of information relating to the ambient humidity of a given enclosed area may be by any means currently known in the art. 
         [0010]    When the humidity sensor detects that ambient humidity has dropped below a preset value, the system will initiate steam generation in order to raise the humidity level and start the supply fan. When the humidity Sensor detects that the ambient humidity has exceeded a preset value, the system will cease to produce steam and shut off the supply fan. Typically, indoor ambient humidity is maintained at 25% to 50% in order for most persons to feel comfortable. 
         [0011]    The system of the present invention will incorporate a steam generation unit and a steam dispersion outlet to be mounted in the discharge duct. The steam dispersion outlet may be any acceptable outlets that will introduce steam into the outlet air flow of the existing air-conditioning or heating unit. The steam dispersion outlet may be a steam dispersion tube having one or more openings. Alternatively, the steam dispersion outlet may be one or more nozzles suitable for the delivery of steam. If nozzles are used, appropriate drain structures are in place to capture, accumulate and remove excess condensate that may develop in the nozzle region. 
         [0012]    The system of the present invention further includes at least one outlet to drain water from the steam generation device. Although this drain may remove water in any acceptable manner, a preferred manner would be to incorporate the drain of the steam generator with the existing drain riser in the air-conditioning or heating unit to be modified. 
         [0013]    In an alternative embodiment, steam generated from an external source may be delivered to the system of the present invention. For example, units that provide hot water on demand may be modified such that delivery of steam to the system of the present invention may be accomplished. In this embodiment, the steam dispersion will occur in the same manner as if the steam generation occurred within the existing vertical fan coil. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]      FIG. 1  is a front view of a vertical fan housing incorporating the present invention. 
           [0015]      FIG. 2  is a partial cut away view of the vertical fan housing of  FIG. 1 . 
           [0016]      FIG. 3  is a side cut away view of the vertical fan housing of  FIG. 1 . 
           [0017]      FIG. 4  is a top view of the vertical fan housing of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0018]    The system of the present invention includes a vertical fan coil housing  1 , modified to include a humidifier unit  2 . Fan  3 , is above a coil  16 , which is located on the interior underneath return air grille  12 . 
         [0019]    Partition wall  7  is positioned with a partition floor  22  a partition ceiling  23  to form a humidifier cavity  24  with sides of the cavity being the sides of vertical fan coil housing  1  and a closure formed by access door  10 . The cavity is an enclosure around humidifier  2 , such that humidifier  2  is not in the air stream that travels through chamber  21 . The air stream that enters return air grille  12  is propagated by fan  3  into chamber  21  exiting grille  6  into discharge plenum  11  and finally exiting at discharge grille  4 . Humidifier  2  includes a humidity gauge  13 , and a water inlet supply line  9 , optionally, the floor of discharge plenum  11  has plenum drain line  14  which connects to drain riser  5  at connection  17 . Humidifier drain line  19  is positioned under humidifier  2  and condensate accumulated inside humidifier  2  flows towards drain riser  5  where drain line  19  connects to drain riser  5  at humidifier drain line connector  18 . 
         [0020]    Vertical fan coil housing  1  also includes in discharge plenum  11  a steam dispersion tube  8  is mounted in discharge plenum  11  that delivers steam  15  to the air in discharge plenum  11  which combines with air exiting from chamber  21  through grille  6  and ultimately exits vertical fan coil housing  1  at discharge grille  4 . Steam dispersion tube  8  is mounted in the discharge ductwork and connectively piped to the humidity steam generator  2 . Plenum drain line  14  has a drain line inlet  24  positioned near the floor of discharge plenum  11 . Accumulated water is removed by entering drain line inlet  24  of plenum drain line  14  and is moved from the system where plenum drain line connector  19  attaches to drain riser  5 . 
         [0021]    The system provides an advantageous configuration in allowing access to all components through access door  10  on the front of vertical fan coil housing  1 . Steam  15  is produced within the vertical fan coil housing  1  and does not need to be transported to housing  1 . Ambient air flows into vertical fan coil housing  1  through return air grille  12  passes over coil  16  and is directed by fan  3  into air flow chamber  21 . Preferably, return air grille  12  is larger than discharge grille  4 . The ambient air exits chamber  21  through plenum grille  6  into discharge plenum  11 . Steam  15  generated within humidifier  2  is directed to steam transfer tube  20  and is dispersed into discharge plenum  11  through steam dispersion tube  8 . Steam transfer tube  20  is connectively piped to steam dispersion tube  8  mounted in the discharge ductwork. In a preferred embodiment, a minimum of eighteen inches of straight ductwork above dispersion tube  8  is desired. Air traveling through chamber  21  exits plenum grille  6  and combines with steam  15  in discharge plenum  11 . The mixture of air with steam exits vertical fan coil housing  1  through discharge grille  4 . 
         [0022]    Thus the unit of the present invention does not need to transport steam from outside vertical fan coil housing  1 . The unit produces steam  15  within vertical fan coil housing  1  by connection of a water inlet supply line  9  to a steam generating humidifier  2  placed within housing  1 . The aforementioned mixture of air with steam that exits vertical fan coil housing  1  through discharge grille  4  provides humidified air delivery through discharge grille  4 . 
         [0023]    While the invention has been described in its preferred form or embodiment with some degree of particularity, it is understood that this description has been given only by way of example and that numerous changes in the details of construction, fabrication, and use, including the combination and arrangement of parts, may be made without departing from the spirit and scope of the invention.