Internal threaded copper pipe structure

The invention relates to the technical field of heat-transfer pipes, and discloses an internal threaded copper pipe structure. The internal threaded copper pipe structure comprises a copper pipe body, wherein the inner wall of the copper pipe body is provided with two groups of toothed ribs in a spiral distribution; the toothed ribs include toothed ribs I and toothed ribs II; the cross section of each toothed rib I is of a rectangular structure; the cross section of each toothed rib II is of a triangular structure; on any cross section of the copper pipe body, the arc surface of the toothed ribs I and the toothed ribs II respectively occupies one half of the circumference; an included angle beta between each of the toothed ribs I and the toothed ribs II and the axis of the copper pipe body is 10-45 degrees. Therefore, the internal threaded copper pipe structure has the beneficial effects that the refrigerant flow resistance can be effectively reduced, and the heat exchange rate of refrigerants at different parts in the copper pipe body is improved, so that the internal-external heat exchange performance of the copper pipe body is enhanced.