HEAT EXCHANGER Russian patent published in 2010 - IPC F25B39/02 

FIELD: heating.

SUBSTANCE: invention concerns refrigerating engineering. A heat exchanger (301) is designed to be connected to an evaporator (201) of a heat-transfer system wherein a working medium used is compressed and evaporated. The heat exchanger comprises a first tube (107) with its first end (303) shaped in such a way to be attached to an outlet fitting (204) of the evaporator and to transfer the medium from said outlet fitting, and the second tube (108) with its first shaped in such a way to be connected to the inlet fitting of the evaporator and to transfer the medium to said inlet fitting. The second tube is mounted inside of the first tube, or in thermal contact thereto, herewith ensuring the relations (109, 110) of the respective lengths of the first and second tubes to enable heat exchange between the mediums in these tubes. The first tube is made of the steel alloy consisting of ingredients reducing hardness of said steel alloy, thereby easing bend of the tube and enabling to bend the first tube in installation in the heat transfer system.

EFFECT: application of the invention allows reducing cost of the heat exchanger.

31 cl, 10 dwg