Abstract:
A drainage system comprising a first bracket having a horizontal structure and one or more vertical structures, a second bracket having a horizontal structure and one or more vertical structures and a drain pan having a plurality of locking mechanisms, each configured to interlock with one of the vertical structures of the first bracket or the second bracket.

Description:
TECHNICAL FIELD 
       [0001]    The present disclosure relates generally to drainage systems for equipment, and more specifically to a drain pan that can be readily installed on equipment without the use of tools, using two or more brackets that are adapted to be easily attached to common surfaces. 
       BACKGROUND OF THE INVENTION 
       [0002]    Condensate drain pans are used to collect condensate, but are typically installed with connectors that require machine tools to attach. The space around the condensate drain pans is typically crowded with other equipment that makes using machine tools difficult or impossible. 
       SUMMARY OF THE INVENTION 
       [0003]    A drainage system is disclosed that includes a first bracket having a horizontal structure, such as a flat surface, and one or more vertical structures, such as legs. A second bracket also has a horizontal structure, such as a flat surface, and one or more vertical structures, such as legs. A drain pan has locking mechanisms that correspond to the legs of the brackets, which interlock with one of the legs of the first bracket or the second bracket. 
         [0004]    Other systems, methods, features, and advantages of the present disclosure will be or become apparent to one with skill in the art upon examination of the following drawings and detailed description. It is intended that all such additional systems, methods, features, and advantages be included within this description, be within the scope of the present disclosure, and be protected by the accompanying claims. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0005]    Aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings may be to scale, but emphasis is placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and in which: 
           [0006]      FIG. 1  is a diagram of a tool-less and removable condensate drain pan in accordance with an exemplary embodiment of the present disclosure; 
           [0007]      FIG. 2  is a side view of a tool-less and removable condensate drain pan in accordance with an exemplary embodiment of the present disclosure; 
           [0008]      FIG. 3  is a front view of a tool-less and removable condensate drain pan in accordance with an exemplary embodiment of the present disclosure; and 
           [0009]      FIG. 4  is a detail showing a connection point between a support bracket and a tool-less and removable condensate drain pan in accordance with an exemplary embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0010]    In the description that follows, like parts are marked throughout the specification and drawings with the same reference numerals. The drawing figures may be to scale and certain components can be shown in generalized or schematic form and identified by commercial designations in the interest of clarity and conciseness. 
         [0011]    Fan coil units for cooling systems use a fan to force air past metal coils, which are used to hold expanding pressurized gas in what is commonly called an “evaporator” coil. As the gas expands, it absorbs heat from the metal coils, which results in the temperature of the metal coils being reduced. The air that is forced past the metal coils is also subsequently cooled as heat from the air is transferred to the metal coils, which results in a lowered dew point of the air and condensation of water vapor from the air on the coils. Any particulate matter in the air can also be deposited on the surface of the evaporator coils with the condensate, such that the metal coils will require periodic maintenance. This maintenance includes cleaning and possibly replacing the condensate drain pan, if needed due to fouling or accumulation of particulate matter. The present disclosure provides a mechanism to allow the drain pan to be removed without the need for a power tool or hand tool. The present disclosure can also or alternatively be used for water coils, steam coils or any other coils that can leak, such as for leak protection. 
         [0012]    Condensate drain pans used in the prior art typically require a power tool or hand tool to install or remove, or complex bracket designs that are incorporated with the cooling coil supports. These prior art condensate drain pans create issues because access to the drain pans may be limited and severely inhibit tool access, or the complex brackets may not be compatible with an existing design for cooling coils. In contrast, the present disclosure provides a condensate drain pan that has an attachment mechanism that can be secured to a suitable surface of the associated cooling system, to allow the condensate drain pan to be attached to the unit at a location where the cooling coils are directly above the pan. 
         [0013]    The tool-less removable condensate drain pan of the present disclosure can be used in a cooling system such as with heating, ventilation and air conditions (“HVAC”) equipment that utilizes a condensate drain pan to drain condensate from a hydronic or direct expansion cooling coil. The disclosed tool-less drain pan can be sloped in two planes to provide a gravity-fed condensate collection to a main drain line, so as to comply with ASHRAE 62 IAQ requirements. 
         [0014]    The disclosed drain pan can be removed without the use of a service tool, such as a screw driver, hex nut driver, hex head wrench, socket wrench or other service tools. The mounting brackets and condensate drain pan mounting interface provide a slope to the drain pan in two planes, to cause any condensate to flow to the drain pan&#39;s main drain line using only the force of gravity. Because the disclosed drain pan and support brackets can be readily adapted to existing designs, they can be used for units with internal or external drain pans. 
         [0015]      FIG. 1  is a diagram of a tool-less and removable condensate drain pan  100 , in accordance with an exemplary embodiment of the present disclosure. Drain pan  100  includes drain pan body  102 , which can be formed from injection molded plastic, sheet metal or other suitable materials. Support brackets  104  and  106  are used to hold drain pan body  102 , and are configured as described in greater detail herein to interface with and drain pan body  102 , and securely hold drain pan body  102  in position during use. Drain pipe  108  can be used to drain condensate from drain pan body  102 , can couple to a drain line (not explicitly shown) or can otherwise be used to control condensate disposal. 
         [0016]    Support brackets  104  and  106  each include two vertical supports and a horizontal support with mounting holes  112 , which are used in conjunction with a bolt, screw, rivet or other suitable attachment devices to attach support brackets  104  and  106  to a suitable surface. In one exemplary embodiment, support brackets  104  and  106  can be attached to the external underside structural surface of an evaporator coil support, such as by using mounting holes and an associated attachment device, by welding, epoxy or in other suitable manners. In another exemplary embodiment, support brackets  104  and  106  can be attached to an internal surface of a device that includes evaporator cooling coils, such as HVAC units, refrigerator units, ice makers or other suitable devices. Support brackets  104  and  106  also have two mechanical locking interfaces  114  that interlock with a corresponding mechanical locking interface  116  on drain pan body  102 , such that drain pan body includes four mechanical locking interfaces  116 . These mechanical locking interfaces are described in greater detail below. 
         [0017]    In one exemplary embodiment, drain pan body  102  can be configured to have an incline towards condensate drain  108 , such as by having an incline from support bracket  104  towards support bracket  106 , an incline from the side opposite condensate drain  108  towards the side on which condensate drain  108  is installed, or in other suitable manners. In another exemplary embodiment, support brackets  104  and  106  can be configured to provide an incline to drain pan body  102  towards condensate drain  108 , such as by providing support bracket  104  with shorter vertical supports than support bracket  106 , by providing vertical supports that are shorter on the side opposite condensate drain  108  or in other suitable manners. 
         [0018]      FIG. 2  is a side view of a tool-less and removable condensate drain pan  100  in accordance with an exemplary embodiment of the present disclosure. As shown in  FIG. 2 , drain pan body  102  can have a depth “X” along the side opposite from condensate drain  108  and a depth “Y” along the side on which condensate drain  108  is attached, where X is less than Y, so as to create an incline in the direction of condensate drain  108 . 
         [0019]      FIG. 3  is a front view of a tool-less and removable condensate drain pan in accordance with an exemplary embodiment of the present disclosure. As shown in  FIG. 3 , drain pan body  102  can have a depth “X” along the end opposite from condensate drain  108  and a depth “Y” along the end on which condensate drain  108  is attached, where X is less than Y, so as to create an incline in the direction of condensate drain  108 . Also shown in  FIG. 3  is dimension A, which is the distance between the top of support bracket  104  and mechanical locking interface  114  that interfaces with the corresponding mechanical locking interface  116  of drain pan body  102 , and the corresponding dimension B, which is the distance between the top of support bracket  106  and the corresponding mechanical locking interface  116  of drain pan body  102  for that side of support bracket  106 . 
         [0020]      FIG. 4  is a detail showing a connection point between a support bracket and a tool-less and removable condensate drain pan  100  in accordance with an exemplary embodiment of the present disclosure. Mechanical locking interface  116  is formed in this exemplary embodiment by cutting, machining or otherwise suitably forming a rectangular notch  402  in either side along the vertical leg of support bracket  106 , which locks with a corresponding mechanical locking interface of drain pan body  102 , and which can be formed by cutting, machining or otherwise forming a rectangular notch  406  into an upper edge of drain pan body  102 . In addition, an angular leading edge  404  can be formed at the end of the vertical leg of support bracket  106 , to aid in guiding the vertical leg into rectangular notch  406 . 
         [0021]    As previously discussed, the location of rectangular notch  402  along the length of the vertical leg of support bracket  106  (or support bracket  104 ) can be varied, so as to create an incline in the bottom surface of drain pan body  102 , to aid in causing condensate to flow to condensate drain  108 . Likewise, the locations of rectangular notches  402  at other locations of support brackets  104  and  106  can be coordinated to facilitate in creating the desired incline for drain pan body  102 . 
         [0022]    Although a specific mechanical interlocking interface has been shown, other suitable mechanical interlocking interfaces can also or alternatively be used. For example, latches, male and female plugs, snap joints, claps, clips, slides, magnetic latches or other suitable devices can be used to connect the vertical legs of support brackets  104  and  106  (or other suitable supports) to drain pan body  102  or other suitable structures, so as to provide a reliable and solid connection between the support brackets  104  and  106  and drain pan body  102 , or other suitable structures. 
         [0023]    As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. As used herein, phrases such as “between X and Y” and “between about X and Y” should be interpreted to include X and Y. As used herein, phrases such as “between about X and Y” mean “between about X and about Y.” As used herein, phrases such as “from about X to Y” mean “from about X to about Y.” 
         [0024]    It should be emphasized that the above-described embodiments are merely examples of possible implementations. Many variations and modifications may be made to the above-described embodiments without departing from the principles of the present disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure and protected by the following claims.