Kind of microchannel heat exchanger

Abstract

A microchannel heat exchanger. The heat exchanger includes two parallel collecting pipes on two sides, and a group of microchannel flat pipes between the two sides, and both ends of every microchannel flat pipe are connected to the collecting pipes. Tube walls of the microchannel flat pipe are tightly fit and fixed on the plate shaped heat conducting fin. A microchannel heat exchanger according to the invention gives good strength to the microchannel flat pipes, so as to avoid bending. Additionally, it increases the thickness of microchannel flat pipe, which can substantially prevent it from being worn or exposed. Moreover, the gap due to length error can be eliminated. Lastly, the thermal conduction capability is improved, which reduces the usage of silicone grease, and makes its application becomes more convenient.

1 . A microchannel heat exchanger, including a group of microchannel flat pipe interconnected to form a heat exchange flow channel, wherein a wall of the microchannel flat pipe is tightly fit and fixed on a plate-shaped heat conduction fin. 
     
     
         2 . The microchannel heat exchanger according to  claim 1 , wherein a base material of the plate-shaped heat conduction fin and the microchannel flat pipe is the same. 
     
     
         3 . The microchannel heat exchanger according to  claim 2 , wherein the base material of the plate-shaped heat conduction fin and the microchannel flat pipe is aluminum. 
     
     
         4 . The microchannel heat exchanger according to  claim 1 , wherein the microchannel flat pipe is welded on the plate-shaped heat conduction fin. 
     
     
         5 . The microchannel heat exchanger according to  claim 1 , wherein a heat exchange channel of the microchannel flat pipe is formed by interconnected collecting pipes on its two sides. 
     
     
         6 . The microchannel heat exchanger according to  claim 5 , wherein the collecting pipes and a group of microchannel pipe form a continuous heat exchange channel from an inlet connection to an outlet connection. 
     
     
         7 . The microchannel heat exchanger according to  claim 1 , wherein all surfaces extending in a width direction of the group of microchannel flat pipe are in the same plane, and the flat pipe is tightly fit and fixed on the plate-shaped heat conduction fin. 
     
     
         8 . A microchannel heat exchanger, including a group of microchannel flat pipe interconnected to form a heat exchange flow channel, wherein a wall of the microchannel flat pipe is tightly fit and fixed on a plate-shaped heat conduction fin, wherein the base material of the plate-shaped heat conduction fin and the microchannel flat pipe is aluminum, wherein the microchannel flat pipe is welded on the plate-shaped heat conduction fin, wherein a heat exchange channel of the microchannel flat pipe is formed by interconnected collecting pipes on its two sides, wherein the collecting pipes and a group of microchannel pipe form a continuous heat exchange channel from an inlet connection to an outlet connection, and wherein all surfaces extending in a width direction of the group of microchannel flat pipe are in the same plane, and the flat pipe is tightly fit and fixed on the plate-shaped heat conduction fin.