Condensing Dehumidifier for an Arena or the Like

Abstract

A dehumidifier for operation within the 5° C. to 20° C. temperature range and 50 to 100 percent relative humidity range of air includes an evaporator, a condenser, a fan that draws humid air through the evaporator and condenser, and a compressor for pumping refrigerant fluid through both the evaporator and condenser. The evaporation temperature is maintained in the evaporator at least at −4° C., resulting in a temperature within the evaporator and at the outlet thereof being greater than 0° C., thereby preventing the formation of ice in the evaporator and allowing the operation of the evaporator to its full power all the time.

What is claimed is: 
     
         1 . A dehumidifier for operation within a 5° C. to 20° C. temperature range and 50 to 100 percent relative humidity range of an air comprising:
 an evaporator having an evaporation temperature maintained at −4° C. or above, resulting in a temperature within the evaporator and at the outlet thereof being greater than 0° C. 
 
     
     
         2 . The dehumidifier of  claim 1 , wherein the evaporator has at least six (6) rows of tubes and a height that is lower than about 300 mm. 
     
     
         3 . The dehumidifier of  claim 1 , further comprising:
 a condenser;   a fan for drawing the air through both the evaporator and condenser; and   a compressor for forcing a refrigerant fluid through the condenser and evaporator.   
     
     
         4 . The dehumidifier of  claim 3 , further comprising a system to maintain the evaporation temperature to −4° C. or above. 
     
     
         5 . The dehumidifier of  claim 4 , wherein the system to maintain the evaporation temperature to −4° C. or above includes a bypass circuit to direct part of the refrigerant fluid directly from an outlet of the compressor to the evaporator. 
     
     
         6 . The dehumidifier of  claim 4 , wherein the system to maintain the evaporation temperature to at −4° C. or above includes at least one of a speed controller and a power controller for the pump. 
     
     
         7 . The dehumidifier of  claim 1 , wherein the evaporator includes a water collecting element. 
     
     
         8 . The dehumidifier of  claim 7 , wherein the water collecting element is a pan or a tank. 
     
     
         9 . A dehumidifier for operation within a 5° C. to 20° C. temperature range and 50 to 100 percent relative humidity range of an air, comprising:
 at least one evaporator, each having at least six (6) rows of tubes and a height that is lower than about 300 mm. 
 
     
     
         10 . The dehumidifier of  claim 9 , wherein each of the at least one evaporator includes a water collecting element. 
     
     
         11 . The dehumidifier of  claim 10 , wherein the at least one evaporator includes a plurality of evaporators. 
     
     
         12 . The dehumidifier of  claim 10 , wherein the water collecting element is a pan or a tank. 
     
     
         13 . The dehumidifier of  claim 9 , further comprising:
 a condenser;   a fan for drawing the air through both the at least one evaporator and the condenser; and   a compressor for forcing a refrigerant fluid through the condenser and the at least one evaporator.   
     
     
         14 . An evaporator for a dehumidifier that operates within a 5° C. to 20° C. temperature range and 50 to 100 percent relative humidity range of an air, the evaporator having an evaporation temperature maintained at −4° C. or above, resulting in a temperature within the evaporator and at the outlet thereof being greater than 0° C.