High-efficiency tube

Abstract

The invention provides a high-efficiency pipe, comprising a common rifled pipe. The high-efficiency pipe is characterized in that a plurality of small projective ribs provided with the streamline-form section edges are arranged on the inner surface of the common rifled pipe; the thread is also arranged on the inner surface of the small projective ribs; the height of the small projective rib is 0.15 to 0.35mm; the arrangement of the small projective ribs increases the surface area of the inner surface of a heat transmission pipe so as to enhance the heat-exchanging efficiency; moreover, the small projective rib is provided with the streamline-form section edges without bevels so as to avoid the appearance of cracks, avoid the falling of pieces and enhance the service life of a compressor.

Description

Technical field: [0001] The invention relates to a heat transfer tube, which is suitable for evaporators and condensers used in air-conditioning and refrigeration industries. Background technique: [0002] Existing heat transfer tubes are ordinary internal threaded tubes, and the surface area of ​​the threads in the tube is small, resulting in low heat exchange efficiency. Chinese Patent No. ZL03243067.1 discloses a seamless high-efficiency heat transfer tube with thin tooth internal threads. The feature is that multiple ribs with helix angles and trapezoidal edges are made on the inner surface of the ordinary internal threaded pipe. Although it can increase the surface area of ​​the internal thread and improve the heat exchange efficiency, because the ribs are trapezoidal, the corners are generated. Small cracks are easy to occur at the knuckles, resulting in shavings, and the shavings can easily enter the compressor, affecting the service life of the compressor. Inventio...

AI Technical Summary

Problems solved by technology

[0002] Existing heat transfer tubes are ordinary internal threaded tubes, and the surface area of ​​the threads in the tube is small, resulting in low heat exchange efficiency. Chinese Patent No. ZL03243067.1 discloses a seamless high-efficiency heat transfer tube with thin tooth internal threads. The feature is that multiple ribs with helix angles and trapezoidal edges are made on the inner surface of the ordinary internal threaded pipe. Although it can increase the surface area of ​​the internal thread and improve the heat exchange efficiency, because the ribs are trapezoidal, the corners are generated. It is easy to produce small cracks at its knuckles, resulting in shavings, and shavings can easily enter the compressor, affecting the service life of the compressor

Images