2-PATH SERPENTINE TYPE HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To restrict biased flow of CO2 refrigerant to one of a first tube and a second tube constituting both right and left paths while keeping an inner diameter size of a flowing header pipe when a 2-path serpentine type heat exchanger is applied. SOLUTION: An inflow side header pipe 2 is made such that its one end in an axial direction is formed with an opening, this opening is provided with an orifice hole 12 extending in an axial direction of the header pipe 2, and an inner diameter of the orifice hole 12 is set to be in a range from 1/3 to 2/3 as compared with an inner diameter of a refrigerant passage 2a of the header pipe 2.