To provide a heat exchanger pipe for an air conditioner with grooves in an inner surface thereof which can very easily formed and has an enhanced heat transfer performance.
The title heat exchanger pipe for an air conditioner has in an inner surface thereof a large number of parallel slant grooves 1 having an inclination with respect to a longitudinal direction, and a less number of straight grooves 2 as compared with the number of the slant grooves 1 are provided in such a manner as to be spaced apart from each other in a peripheral direction of the pipe. Depth of the straight groove 2 is smaller than that of the slant groove 1 and the slant groove 1 is formed in such a manner that the slant groove 1 does not exist in the straight groove 2.
HAGIWARA HISAO
ONISHI JUN