Heat exchanger tube and heat exchanger using the same

A heat exchanger comprising:

• a plurality of tubes (300), each of which having a plurality of inside passages (320), each inside passages having a first curved portion (321) that is made by changing predetermined curves (321a and 322a) over at least a time or more to form a curve changing point protruding in the width direction of a body (350), by which turbulence activating parts (321b and 322b) are formed, and having a second curved portion (322) that is formed opposite to said first curved portion (321) and is connected slowly to said first curved portion (321) to thereby form a curve closed face, and a pair of outside passages (330) disposed on the outermost both ends of said plurality of inside passages (320), said plurality of tubes spaced apart equally through which a heat exchanging medium flows;
• a plurality of corrugated fins (400 and 634) disposed between said tubes (300);
• and
• a pair of header tanks (200) spaced apart equally in parallel relation with each other such that the both ends of each of said tubes (300) communicate with each other, through which said heat exchanging medium flows.

A heat exchanger comprising:

• a plurality of tubes, each of which having a plurality of inside passages, each inside passages having a first curved portion that is made by changing predetermined curves over at least a time or more to form a curve changing point protruding in the width direction of a body, by which turbulence activating parts are formed, and having a second curved portion that is formed opposite to said first curved portion and is connected slowly to said first curved portion to thereby form a curve closed face, and a pair of outside passages disposed on the outermost both ends of said plurality of inside passages, said plurality of tubes spaced apart equally through which a heat exchanging medium flows;
• a plurality of corrugated fins disposed between said tubes;
• and
• a pair of header tanks spaced apart equally in parallel relation with each other such that the both ends of each of said tubes communicate with each other, through which said heat exchanging medium flows.