Microchannel heat exchanger

Abstract

A microchannel heat exchanger includes at least one manifold and at least one a microchannel tube. The microchannel tube includes a plurality of ports, and the microchannel tube extends from the at least one manifold. The plurality of ports each have a width and a height. The microchannel heat exchanger further includes at least one fin extending from the at least one manifold. The fins are arranged between the at least one microchannel tube and a second microchannel tube. The microchannel heat exchanger further includes a refrigerant arranged to flow through the microchannel tube. At least one port of the plurality of ports has a cross-section area less than 0.35 millimeters squared.

1 . A microchannel heat exchanger, comprising:
 at least one manifold;   at least one a microchannel tube comprising a plurality of ports, the at least one microchannel tube extending from the at least one manifold, the plurality of ports each having a width, a height, and a cross-section area;   at least one fin extending from the at least one manifold and arranged between the at least one microchannel tube and a second microchannel tube;   a refrigerant arranged to flow through the microchannel tube; and   wherein at least one port of the plurality of ports has a cross-section area less than 0.35 millimeters squared.   
     
     
         2 . The microchannel heat exchanger of  claim 1 , wherein at least one of the plurality of ports has an aspect ratio greater than 1.5. 
     
     
         3 . The microchannel heat exchanger of  claim 1 , wherein at least one of the plurality of ports has a height less than 0.6 millimeters. 
     
     
         4 . The microchannel heat exchanger of  claim 1 , wherein at least one of the plurality of ports has an aspect ratio of approximately 1.0, a height less than 0.5 millimeters, and a width less than 0.5 millimeters. 
     
     
         5 . The microchannel heat exchanger of  claim 1 , further comprising a fan, the fan arranged to blow air across the at least one fin. 
     
     
         6 . The microchannel heat exchanger of  claim 1 , wherein the at least one manifold is in communication with a heating, ventilation, and air conditioning system. 
     
     
         7 . The microchannel heat exchanger of  claim 1 , comprising a low global warming potential (low-GWP) refrigerant. 
     
     
         8 . A condenser, comprising:
 an enclosure; and   a microchannel heat exchanger enclosed within the enclosure, the microchannel heat exchanger comprising:
 at least one manifold; 
 at least one a microchannel tube comprising a plurality of ports, the at least one microchannel tube extending from the at least one manifold, the plurality of ports each having a width, a height, and a cross-section area; 
 at least one fin extending from the at least one manifold and arranged between the at least one microchannel tube and a second microchannel tube; 
 a refrigerant arranged to flow through the microchannel tube; and 
 wherein at least one port of the plurality of ports has a cross-section area less than 0.35 millimeters squared. 
   
     
     
         9 . The condenser of  claim 8 , wherein at least one of the plurality of ports has an aspect ratio greater than 1.5. 
     
     
         10 . The condenser of  claim 8 , wherein at least one of the plurality of ports has a height less than 0.6 millimeters. 
     
     
         11 . The condenser of  claim 8 , wherein at least one of the plurality of ports has an aspect ratio of approximately 1.0, a height less than 0.5 millimeters, and a width less than 0.5 millimeters. 
     
     
         12 . The condenser of  claim 8 , further comprising a fan, the fan arranged to blow air across the at least one fin. 
     
     
         13 . The condenser of  claim 8 , wherein the at least one manifold is in communication with a heating, ventilation, and air conditioning system. 
     
     
         14 . The condenser of  claim 8 , comprising a low global warming potential (low-GWP) refrigerant. 
     
     
         15 . A heating, ventilation, and air conditioning (HVAC) system, comprising:
 a condenser; and   a microchannel heat exchanger, the microchannel heat exchanger comprising:
 at least one manifold; 
 at least one a microchannel tube comprising a plurality of ports, the at least one microchannel tube extending from the at least one manifold, the plurality of ports each having a width and a height; 
 at least one fin extending from the at least one manifold and arranged between the at least one microchannel tube and a second microchannel tube; 
 a refrigerant arranged to flow through the microchannel tube; and 
 wherein at least one port of the plurality of ports has a cross-section area less than 0.35 millimeters squared.. 
   
     
     
         16 . The HVAC system of  claim 15 , wherein at least one of the plurality of ports has an aspect ratio greater than 1.5. 
     
     
         17 . The HVAC system of  claim 15 , wherein at least one of the plurality of ports has a height less than 0.6 millimeters. 
     
     
         18 . The HVAC system of  claim 15 , wherein at least one of the plurality of ports has an aspect ratio of approximately 1.0, a height less than 0.5 millimeters, and a width less than 0.5 millimeters. 
     
     
         19 . The HVAC system of  claim 15 , further comprising a fan, the fan arranged to blow air across the at least one fin. 
     
     
         20 . The HVAC system of  claim 15 , further comprising a low global warming potential (low-GWP) refrigerant.