Heat exchanger

Abstract

A heat exchanger for exchanging heat with gas made to flow in a flow direction is disclosed. The heat exchanger is provided with: a plurality of plates each having a first side and a second side; a plurality of tubes configured to conduct a thermal medium, the tubes penetrating the plates and being arranged in parallel with each other and on a plurality of planes perpendicular to the flow direction, wherein the tubes on each plane are disposed adjacent to gaps between the tubes on any of adjacent planes so as to form a plurality of serpentine flow lines among the tubes; and a plurality of bridges projecting on the first sides of the plates, the bridges being respectively arranged to be perpendicular to the serpentine flow lines.

1 . A heat exchanger for exchanging heat with gas made to flow in a flow direction, the heat exchanger comprising:
 a plurality of plates each having a first side and a second side;   a plurality of tubes configured to conduct a thermal medium, the tubes penetrating the plates and being arranged in parallel with each other and on a plurality of planes perpendicular to the flow direction, wherein the tubes on each plane are disposed adjacent to gaps between the tubes on any of adjacent planes so as to form a plurality of serpentine flow lines among the tubes; and   a plurality of bridges projecting on the first sides of the plates, the bridges being respectively arranged to be perpendicular to the serpentine flow lines.   
   
   
       2 . The heat exchanger of  claim 1 , wherein each of the bridges includes a pair of legs at both ends to be arranged along the serpentine flow lines. 
   
   
       3 . The heat exchanger of  claim 1 , further comprising ribs projecting on the first sides of the plates and running at respective middles of the planes. 
   
   
       4 . A heat exchanger for exchanging heat with gas made to flow in a flow direction, the heat exchanger comprising:
 a plurality of plates each having a first side and a second side;   a plurality of tubes configured to conduct a thermal medium, the tubes penetrating the plates and being arranged at an even pitch in parallel on a plurality of planes perpendicular to the flow direction, wherein the tubes on each plane are respectively deviated in a lateral direction with respect to the tubes on any of adjacent planes by half of the pitch of the tubes and the half of the pitch is not greater than diameters of the tubes; and   a plurality of bridges projecting on the first sides of the plates, the bridges being respectively arranged to be perpendicular to the serpentine flow lines.   
   
   
       5 . The heat exchanger of  claim 4 , wherein each of the bridges includes a pair of legs at both ends to be arranged along the serpentine flow lines. 
   
   
       6 . The heat exchanger of  claim 4 , further comprising ribs projecting on the first sides of the plates and running at respective middles of the planes. 
   
   
       7 . A heat exchanger for exchanging heat with gas made to flow in a flow direction, the heat exchanger comprising:
 a plurality of plates each having a first side and a second side;   a plurality of openings formed on the plates and arranged in a plurality of rows perpendicular to the flow direction, wherein the openings in each row are disposed adjacent to gaps between the openings in any of adjacent rows;   a plurality of bridge groups respectively projecting on the first sides of the plates and being disposed at the gaps,
 each of the bridge groups including a plurality of bridges perpendicular to the flow direction and arranged in a row along the flow direction, a first pair of sub-bridges disposed on an upstream end of the row with respect to the flow direction and slanted from a center to both sides of the first pair toward the flow direction, and a second pair of sub-bridges disposed on a downstream end of the row with respect to the flow direction and slanted from both sides to a center of the second pair toward the flow direction; and 
   a plurality of tubes configured to conduct a thermal medium, the tubes respectively penetrating the openings.   
   
   
       8 . The heat exchanger of  claim 7 , wherein the openings are arranged at an even pitch in each row and a half of the pitch is not greater than diameters of the tubes. 
   
   
       9 . The heat exchanger of  claim 7 , wherein each of the bridges and sub-bridges includes a pair of legs at both ends to be arranged along flow lines of the gas directed by the tubes. 
   
   
       10 . The heat exchanger of  claim 7 , further comprising ribs projecting on the first sides of the plates and running at respective middles of the rows of the openings.