Systems and methods of heating, cooling and humidity control in air filtration adsorbent beds

Abstract

An air filtering system for an enclosure that additionally heats and/or cools one or more regenerative beds of a regenerative thermal swing absorption (TSA) component of the system includes a closed loop indoor temperature adjusting circuit having a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion valve disposed therealong for conditioning air of the enclosure. At least one diversion line of the temperature adjusting circuit passes through the one or more regenerative beds for at least one of heating or cooling the one or more regenerative beds.

1 . An air filtering system for an enclosure that additionally heats and/or cools one or more regenerative beds of a regenerative thermal swing absorption (TSA) component of the system, the system comprising:
 a closed loop indoor temperature adjusting circuit having a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion valve disposed therealong for conditioning air of the enclosure; and   at least one diversion line of the temperature adjusting circuit passing through the one or more regenerative beds for at least one of heating or cooling the one or more regenerative beds.   
     
     
         2 . The system of  claim 1  wherein said at least one diversion line comprises a first diversion line passing through the one or more regenerative beds to heat the one or more regenerative beds and a second diversion line passing through the one or more regenerative beds to cool the one or more regenerative beds. 
     
     
         3 . The system of  claim 2  wherein said first diversion line has a first end disposed downstream from said compressor and upstream from said outdoor heat exchanger and a second end disposed farther downstream from said compressor than said first end and upstream from said outdoor heat exchanger, and wherein said second diversion line has a first end disposed downstream from said outdoor heat exchanger and upstream from said expansion valve and a second end disposed downstream from said indoor heat exchanger and upstream from said compressor. 
     
     
         4 . The system of  claim 3  wherein said second diversion line includes a diversion line expansion valve upstream of the one or more regenerative beds. 
     
     
         5 . The system of  claim 2  wherein said temperature adjusting circuit further includes solenoid valves for controlling fluid flow through said first and second diversion lines. 
     
     
         6 . The system of  claim 1  wherein said temperature adjusting circuit further includes:
 a reversing valve configured to reverse fluid flow through said circuit for selectively operating said circuit in one of a cooling mode or a heating mode; and   a second expansion valve disposed upstream of one of the indoor and outdoor heat exchangers when said circuit is operated in said cooling mode, said expansion valve disposed upstream of the other of the indoor and outdoor heat exchangers when said circuit is operated in said heating mode.   
     
     
         7 . The system of  claim 1  wherein said at least one diversion line includes a preheater diversion line having a preheater disposed therealong for preheating airflow passing through the one or more regenerative beds. 
     
     
         8 . The system of  claim 1  wherein said at least one diversion line includes a dehumidify diversion line having a dehumidifier disposed therealong for dehumidifying airflow passing through the one or more regenerative beds. 
     
     
         9 . The system of  claim 1  wherein said at least one diversion line includes a single line passing through the one or more regenerative beds that selectively heats the one or more regenerative beds when a heat transfer fluid of said circuit flows in a first direction and cools the one or more regenerative beds when said heat transfer fluid flows in a second direction. 
     
     
         10 . An air filtering system, comprising:
 an indoor heat exchanger arranged to exchange heat with air inside an enclosure;   an outdoor heat exchanger fluidly connected to said indoor heat exchanger and arranged to exchange heat with air outside said enclosure;   a compressor for pressurizing a heat transfer fluid carried between said indoor and outdoor heat exchangers;   at least one expansion valve for depressurizing said heat transfer fluid carried between said indoor and outdoor heat exchangers; and   at least one diversion line diverting a portion of said heat transfer fluid carried between said indoor and outdoor heat exchangers through at least one regenerative bed for controlling a temperature thereof.   
     
     
         11 . The air filtering system of  claim 10  wherein said enclosure is a static structure or a moveable structure. 
     
     
         12 . The air filtering system of  claim 11  wherein said enclosure comprises a tent, a building, or a trailer. 
     
     
         13 . The air filtering system of  claim 11  wherein said enclosure comprises a vehicle. 
     
     
         14 . The air filtering system of  claim 10  further including:
 a reversing valve configured to reverse a fluid flow direction of said heat transfer fluid between said indoor and outdoor heat exchangers, fluid flow in a first direction corresponding to a heating mode wherein heat from said indoor heat exchanger heats said air inside said enclosure and fluid flow in a second, opposite, direction corresponding to a cooling mode wherein heat from said air inside said enclosure is removed by said indoor heat exchanger.   
     
     
         15 . The air filtering system of  claim 14  wherein said at least one diversion line comprises a plurality of diversion lines configured to pass said heat transfer fluid through said at least one regenerative bed in a first direction for heating thereof and to pass said heat transfer fluid through said at least one regenerative bed in a second direction for cooling thereof. 
     
     
         16 . The air filtering system of  claim 15  wherein said plurality of diversion lines include a common line through said at least one regenerative bed through which said heat transfer fluid flows in said first direction when heating and in said second direction when cooling. 
     
     
         17 . The air filtering system of  claim 15  wherein said plurality of diversion lines includes a preheater diversion line that selectively preheats air flow passing over a preheater exchanger prior to said air flow passing over said at least one regenerative bed. 
     
     
         18 . The air filtering system of  claim 15  wherein said plurality of diversion lines includes a dehumidify diversion line that selectively dehumidifies air flow passing over a dehumidify exchanger prior to said air flow passing over said at least one regenerative bed. 
     
     
         19 . A method of heating and/or cooling a regenerative bed through an air filtering system for an enclosure, comprising:
 providing a closed loop circuit having a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion valve disposed therealong for conditioning air of the enclosure; and   diverting a portion of a heat transfer fluid carried by said circuit to the regenerative bed to selectively heat or cool the regenerative bed.   
     
     
         20 . The method of  claim 19  further including:
 preheating an air flow with said portion of said heat transfer fluid prior to said air flow passing over the regenerative bed.   
     
     
         21 . The method of  claim 20  further including:
 dehumidifying said air flow with said portion of said heat transfer fluid prior to said air flow passing over the regenerative bed.