Spiral heat exchanger and manufacturing method therefor

Abstract

The present invention application relates to a spiral heat exchanger and a manufacturing method therefor. The spiral heat exchanger comprises: a mandrel ( 1 ) having an axis extending in the direction of left and right; and a heat-conducting thin strip ( 2 ) spirally wound around the periphery of the mandrel ( 1 ) for at least three laps. The heat-conducting thin strip ( 2 ) of any two adjacent laps are spaced apart by a certain distance; baffle ribs ( 3 ) extending in the direction of left and right are supported between the heat-conducting thin strip ( 2 ) of any two adjacent laps; the baffle ribs ( 3 ) are arranged in sequence along a radial direction of the mandrel ( 1 ), so as to form a plurality of hot fluid flow channels ( 4 ) and a plurality of cold fluid flow channels ( 5 ) which are arranged alternately along the radial direction of the mandrel ( 1 ); each cold fluid outlet ( 5 b ) is provided with a first blocking bar ( 6 ) for blocking a portion of the cold fluid outlet ( 5 b ); each of the fluid outlet ( 4 b ) is provided with a second blocking bar ( 7 ) for blocking a portion of the hot fluid outlet ( 4 b ); the first blocking bars ( 6 ) are arranged in sequence along a first radial direction (R 1 ), and the second blocking bars ( 7 ) are arranged in sequence along a second radial direction (R 2 ). The spiral heat exchanger is compact and ingenious in structure and with a small flow resistance, has a large heat exchange area and high heat exchange efficiency, and is quite suitable situations both for gas-gas heat exchange and gas-liquid heat exchange.

1 . A spiral heat exchanger, characterized by comprising:
 a mandrel having an axis extending in left-right direction, and   a heat conduction thin tape having a spiral shape wound around the periphery of the mandrel for at least three circles;   any adjacent circles of the heat conduction thin tape are separated by a certain distance, and baffle ribs extending in left-right direction are configured to support between any adjacent two circles of the heat conduction thin tape, each of the baffle ribs is sequentially arranged along a radial direction of the mandrel, thereby forming a plurality of hot fluid flow channels and a plurality of cold fluid flow channels arranged alternately along the radial direction of the mandrel, each of the hot fluid flow channels has a hot fluid inlet located at its left end and a hot fluid outlet located at its right end, each of the cold fluid flow channels has a cold fluid outlet located at its left end and a cold fluid inlet located at its right end;   first block bars are disposed at each of the cold fluid outlet for partially blocking thereof, second block bars are disposed at each of the hot fluid outlet for partially blocking thereof, each of the first block bars is sequentially arranged along a first radial direction of the mandrel, each of the second block bars is sequentially arranged along a second radial direction of the mandrel.   
     
     
         2 . The spiral heat exchanger according to  claim 1 , characterized in that, third block bars are disposed at each cold fluid outlet for partially blocking thereof, each of the third block bars is sequentially arranged along a third radial direction of the mandrel, the third radial direction and the first radial direction are arranged at a non-zero clip angle. 
     
     
         3 . The spiral heat exchanger according to  claim 2 , characterized in that, fourth block bars are disposed at each of the hot fluid outlets for partially blocking thereof, each of the fourth block bars is sequentially arranged along a fourth radial direction of the mandrel, the fourth radial direction and the second radial direction are arranged at a non-zero clip angle. 
     
     
         4 . The spiral heat exchanger according to  claim 3 , characterized in that, fifth block bars are disposed at each of the cold fluid outlets for partially blocking thereof, each of the fifth block bars is sequentially arranged along a fifth radial direction of the mandrel, the fifth radial direction is arranged at a non-zero clip angle with the first radial direction and the third radial direction, respectively. 
     
     
         5 . The spiral heat exchanger according to  claim 4 , characterized in that, sixth block bars are disposed at each of the cold fluid inlet for partially blocking thereof, seventh block bars are disposed at each of the hot fluid inlets for partially blocking thereof, each of the sixth block bars is sequentially arranged along a sixth radial direction of the mandrel, each of the seventh block bars is sequentially arranged along a seventh radial direction of the mandrel, the sixth radial direction is arranged at a non-zero clip angle with the second radial direction and the fourth radial direction, respectively, the seventh radial direction is arranged at a non-zero clip angle with the third radial direction, the first radial direction and the fifth radial direction, respectively. 
     
     
         6 . The spiral heat exchanger according to  claim 5 , characterized in that, eighth block bars are disposed at each of the cold fluid inlets for partially blocking thereof, ninth block bars are disposed at each of the hot fluid inlets for partially blocking thereof, each of the eighth block bars is sequentially arranged along a eighth radial direction of the mandrel, each of the ninth block bars is sequentially arranged along a ninth radial direction of the mandrel, the eighth radial direction is arranged with the sixth radial direction, the second radial direction and the fourth radial direction, respectively, the ninth radial direction is arranged at a non-zero clip angle with the seventh radial direction, the third radial direction, the first radial direction and the fifth radial direction respectively. 
     
     
         7 . The spiral heat exchanger according to  claim 6 , characterized in that, tenth block bars are disposed at each of the hot fluid outlets for partially blocking thereof, each of the tenth block bars is sequentially arranged along a tenth radial direction of the mandrel, the tenth radial direction is arranged at a non-zero clip angle with the eighth radial direction the sixth radial direction, the fourth radial direction and the second radial direction. 
     
     
         8 . The spiral heat exchanger according to  claim 5 , characterized in that, the sixth radial direction and the first radial direction are arranged at a non-zero clip angle, the seventh radial direction and the second radial direction are arranged at a non-zero clip angle;
 a region of each cold fluid outlets out of the seventh radial direction is fully blocked by the first block bars, a region of each hot fluid outlets out of the sixth radial direction is fully blocked by the second block bars;   a region of each cold fluid inlets out of the second radial direction is fully blocked by the sixth block bars, a region of each hot fluid inlets out of the first radial direction is fully blocked by the seventh block bars.   
     
     
         9 . The spiral heat exchanger according to  claim 1 , characterized in that, both the first block bars and the second block bars are an arc block bars;
 in a radial direction of the mandrel from inside to outside, the length of each of the first block bars increases sequentially, the length of each of the second block bars increases sequentially, and so that the first block bars are fan-distributed, the second block bars are fan-distributed.   
     
     
         10 . The spiral heat exchanger according to  claim 5 , characterized in that, both the sixth block bars and the seventh block bars are an arc block bar;
 in a radial direction of the mandrel from inside to outside, the length of the sixth block bars increases sequentially, the length of the seventh block bars increases sequentially, and so that the sixth block bars are fan distributed, the seventh block bars are fan-distributed.   
     
     
         11 . A manufacturing method for the spiral heat exchanger as claimed in any of  claims 1  to  10 , characterized by comprising:
 winding a heat conduction thin tape around the periphery of a mandrel to have a spiral shape; coating an adhesive on the left and right of the heat conduction thin tape for forming first block bars and second block bars on the corresponding position with a certain length at a certain interval, in the process of the winding the heat conduction thin tape; meanwhile, coating an adhesive on a surface of the heat conduction thin tape for forming the baffle ribs at a certain interval. 
 
     
     
         12 . A spiral heat exchanger, characterized in that, la comprising:
 a mandrel having an axis extending in left-right direction, and   a heat conduction thin tape having a spiral shape wound around the periphery of the mandrel for at least three circles;   any adjacent two circles of the heat conduction thin tape are separated by a certain distance, and baffle ribs extending in left-right direction are configured to support between any adjacent two circles of the heat conduction thin tape, each of the baffle ribs is sequentially arranged along a radial direction of the mandrel, thereby forming a plurality of hot fluid flow channels and a plurality of cold fluid flow channels arranged alternately along a radial direction of the mandrel, each of the hot fluid flow channels has a hot fluid inlet located on its left end and a hot fluid outlet located on its right end, each of the cold fluid flow channels has a cold fluid outlet located on its left end and a cold fluid inlet located on its right end;   a sixth block bars are disposed at each of the cold fluid inlets for partially blocking thereof, a seventh block bars is disposed at each of the hot fluid inlets for partially blocking thereof, each of the sixth block bars is sequentially arranged along a sixth radial direction of the mandrel, each of the seventh block bars is sequentially arranged along a seventh radial direction of the mandrel.   
     
     
         13 . The spiral heat exchanger according to  claim 12 , characterized in that, eighth block bars are disposed at each of the cold fluid inlets for partially blocking thereof, ninth block bars are disposed at each of the hot fluid inlets for partially blocking thereof, each of the eighth block bars is sequentially arranged along an eighth radial direction of the mandrel, each of the ninth block bars is sequentially arranged along a ninth radial direction of the mandrel, the eighth radial direction and the sixth radial direction are arranged at a non-zero clip angle, the ninth radial direction and the seventh radial direction are arranged at a non-zero clip angle. 
     
     
         14 . The spiral heat exchanger according to  claim 12 , characterized in that, both the sixth block bars and the seventh block bars are arc block bars;
 in a radial direction of the mandrel from inside to outside, the length of each of the sixth block bars increases sequentially, the length of each of the seventh block bars increases sequentially, and so that the sixth block bars are fan-distributed, the seventh block bars are fan-distributed.   
     
     
         15 . The spiral heat exchanger according to  claim 14 , characterized in that, each of the sixth block bars has a radian ≥180°, each of the seventh block bars has a radian ≥180°.