Heat exchanger for cooling

Abstract

A plurality of heat exchange plates 12 are laminated on each other so that surfaces of the heat exchange plates 12 can be directed in the direction of gravity, protruding portions 14 composing refrigerant passages 15, 16, in which refrigerant for cooling air flows, are formed on the heat exchange plates 12 in such a manner that the protruding portions 14 extend in the direction of gravity, an air passage is formed between the plurality of heat exchange plates 12, a plurality of contact ribs 17 protruding into the air passage are formed on the heat exchange plates 12, and the pitches P 1 and P 2 in the direction of gravity between the plurality of contact ribs 17 in the lower region on the leeward side are made to be smaller than pitch P 3 in an upper region on the leeward side and a windward side region.

1 . A heat exchanger for cooling, in which condensed water is generated by cooling air, comprising: 
 a heat exchange plate composing a fluid passage in which cooling fluid for cooling the air flows, wherein    a plurality of heat exchange plates are laminated on each other so that faces of the heat exchange plates can be directed in the direction of gravity,    an air passage, in which the air flows, is formed between the plurality of heat exchange plates,    a plurality of protrusions protruding into the air passage are formed on the heat exchange plate, and    the heat exchange plate includes a leeward side region in which a pitch in the direction of gravity between the plurality of protrusions is not more than a predetermined value and also includes a windward side region in which a pitch in the direction of gravity between the plurality of protrusions is larger than that of the leeward side region or the protrusions are not formed.    
   
   
       2 . A heat exchanger for cooling in which condensed water is generated by cooling air, comprising: 
 a heat exchange plate composing a fluid passage in which cooling fluid for cooling the air flows, wherein    a plurality of heat exchange plates are laminated on each other so that faces of the heat exchange plates can be directed in the direction of gravity,    an air passage, in which the air flows, is formed between the plurality of heat exchange plates,    a plurality of protrusions protruding into the air passage are formed on the heat exchange plate, and    the heat exchange plate includes a lower region on the leeward side in which a pitch in the direction of gravity between the plurality of protrusions is not more than a predetermined value and also includes an upper region on the leeward side in which a pitch in the direction of gravity between the plurality of protrusions is larger than that of the lower region on the leeward side or the protrusions are not formed.    
   
   
       3 . A heat exchanger for cooling in which condensed water is generated by cooling air, comprising: 
 a heat exchange plate composing a fluid passage in which cooling fluid for cooling the air flows, wherein    a plurality of heat exchange plates are laminated on each other so that faces of the heat exchange plates can be directed in the direction of gravity,    an air passage, in which the air flows, is formed between the plurality of heat exchange plates,    a plurality of water-holding portions for holding the condensed water attached to the heat exchange plate are provided on the heat exchange plate, and    a pitch in the direction of gravity between the plurality of water-holding portions is set at least in the leeward side region of the heat exchange plate so that the condensed water can gradually flow down between the plurality of water-holding portions, at a predetermined wind speed of the air, without splashing, in the direction of gravity.    
   
   
       4 . A heat exchanger for cooling according to  claim 3 , wherein the water-holding portion is a protrusion protruding from the heat exchange plate into the air passage.  
   
   
       5 . A heat exchanger for cooling according to  claim 4 , wherein 
 a protruding portion is formed on the heat exchange plate in such a manner that the protruding portion extends in the direction of gravity,    the fluid passage is formed inside the protruding portion, and    the protrusions are formed on a side portion of the protruding portion.    
   
   
       6 . A heat exchanger for cooling according to  claim 4 , wherein 
 a protruding portion is formed on the heat exchange plate in such a manner that the protruding portion extends in the direction of gravity,    the fluid passage is formed inside the protruding portion, and    the protrusions are formed on a side of the protruding portion at a predetermined interval.    
   
   
       7 . A heat exchanger for cooling according to  claim 4 , wherein 
 the protrusions are respectively protruded from two heat exchange plates, which are adjacent to each other, into the air passage, and    the protrusions of the two heat exchange plates, which are adjacent to each other, are joined to each other.    
   
   
       8 . A heat exchanger for cooling according to  claim 4 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least at the leeward side region of the heat exchange plate is reduced when it comes to a lower portion in the direction of gravity.    
   
   
       9 . A heat exchanger for cooling according to  claim 4 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on the leeward side of the heat exchange plate is reduced to a value of not more than 30 mm.    
   
   
       10 . A heat exchanger for cooling according to  claim 4 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on leeward side of the heat exchange plate is reduced to a value of not more than 18 mm.    
   
   
       11 . A heat exchanger for cooling according to  claim 10 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on the leeward side of the heat exchange plate is not less than 7 mm.    
   
   
       12 . A heat exchanger for cooling according to  claim 1 , wherein 
 a protruding portion is formed on the heat exchange plate in such a manner that the protruding portion extends in the direction of gravity,    the fluid passage is formed inside the protruding portion, and    the protrusions are formed on a side portion of the protruding portion.    
   
   
       13 . A heat exchanger for cooling according to  claim 2 , wherein 
 a protruding portion is formed on the heat exchange plate in such a manner that the protruding portion extends in the direction of gravity,    the fluid passage is formed inside the protruding portion, and    the protrusions are formed on a side portion of the protruding portion.    
   
   
       14 . A heat exchanger for cooling according to  claim 1 , wherein 
 a protruding portion is formed on the heat exchange plate in such a manner that the protruding portion extends in the direction of gravity,    the fluid passage is formed inside the protruding portion, and    the protrusions are formed on a side of the protruding portion at a predetermined interval.    
   
   
       15 . A heat exchanger for cooling according to  claim 2 , wherein 
 a protruding portion is formed on the heat exchange plate in such a manner that the protruding portion extends in the direction of gravity,    the fluid passage is formed inside the protruding portion, and    the protrusions are formed on a side of the protruding portion at a predetermined interval.    
   
   
       16 . A heat exchanger for cooling according to  claim 1 , wherein 
 the protrusions are respectively protruded from two heat exchange plates, which are adjacent to each other, into the air passage, and    the protrusions of the two heat exchange plates, which are adjacent to each other, are joined to each other.    
   
   
       17 . A heat exchanger for cooling according to  claim 2 , wherein 
 the protrusions are respectively protruded from two heat exchange plates, which are adjacent to each other, into the air passage, and    the protrusions of the two heat exchange plates, which are adjacent to each other, are joined to each other.    
   
   
       18 . A heat exchanger for cooling according to  claim 1 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least at the leeward side region of the heat exchange plate is reduced when it comes to a lower portion in the direction of gravity.    
   
   
       19 . A heat exchanger for cooling according to  claim 2 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least at the leeward side region of the heat exchange plate is reduced when it comes to a lower portion in the direction of gravity.    
   
   
       20 . A heat exchanger for cooling according to  claim 1 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on the leeward side of the heat exchange plate is reduced to a value of not more than 30 mm.    
   
   
       21 . A heat exchanger for cooling according to  claim 2 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on the leeward side of the heat exchange plate is reduced to a value of not more than 30 mm.    
   
   
       22 . A heat exchanger for cooling according to  claim 1 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on leeward side of the heat exchange plate is reduced to a value of not more than 18 mm.    
   
   
       23 . A heat exchanger for cooling according to  claim 2 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on leeward side of the heat exchange plate is reduced to a value of not more than 18 mm.    
   
   
       24 . A heat exchanger for cooling according to  claim 9 , wherein 
 a pitch in the direction of gravity between the plurality of protrusions at least in a lower region on the leeward side of the heat exchange plate is not less than 7 mm.