Dehumidification system

Abstract

An air handling system includes an fan system and an outdoor system. The fan system and the outdoor system are connected by a refrigeration circuit. The fan system includes a dehumidification system.

1 . An air handling system comprising
 an fan system for being located inside a building structure and comprising: a housing having an outdoor air inlet, an indoor air inlet, and an indoor air outlet, a fan configured to displace air through at least one of the outdoor air inlet and the indoor air inlet, a filter module located downstream of the fan, an evaporator located downstream of the filter module, and a PTC heater located downstream of the evaporator, and   an outdoor system for being located outside the building structure and comprising: a compressor, a condenser, and a throttling element, wherein the evaporator and the compressor, a condenser, and the throttling element form a refrigerant circuit.   
     
     
         2 . The air handling system of  claim 1 , wherein the outdoor system further includes a heat exchanger and a switching valve, and wherein the heat exchanger is coupled to the condenser and the refrigerant circuit, and the switching valve is configured to switch flow of the refrigerant between the heat exchanger and the condenser. 
     
     
         3 . The air handling system of  claim 2 , wherein the heat exchanger is connected with a water supply pipe and a water outlet pipe. 
     
     
         4 . The air handling system of  claim 2 , wherein the evaporator is a finned heat exchanger. 
     
     
         5 . The air handling system of  claim 1 , further including a water trap under the evaporator for receiving condensed water from the evaporator. 
     
     
         6 . The air handling system of  claim 1 , wherein the fan system is operable in an indoor air circulation mode and an outdoor air circulation mode. 
     
     
         7 . The air handling system of  claim 6 , wherein in the indoor air circulation mode, the outdoor air inlet is closed, and the fresh air fan displaces air to enter through the indoor air inlet. 
     
     
         8 . The air handling system of  claim 7 , wherein in the outdoor air circulation mode, the indoor air inlet is closed and the outdoor air inlet is opened so that the fan displaces air through the outdoor air inlet.