Finned pipe type heat exchanger

Abstract

The invention discloses a finned pipe type heat exchanger. The finned pipe type heat exchanger is composed of fin pipe bundles, a shell and a water inlet and outlet pipe, wherein the fin pipe bundlesin the finned pipe type heat exchanger are a plurality of fins which are arranged side by side, and penetrate through a plurality of branch paths of the plurality of fins; the plurality of branch paths comprise a plurality of capillary pipes with a plurality of spiral grooves formed in the inner peripheral surface; a main flow path comprises a plurality of capillary pipes with a plurality of spiral grooves and penetrating through the plurality of fins, and formed in the inner peripheral surface, the capillary pipes of the plurality of branch paths comprise at least three branch paths; and a backflow bent pipe arranged in the main flow path is a bent pipe with a smooth inner peripheral surface. According to the finned pipe type heat exchanger, installation, maintenance and cleaning are facilitated, meanwhile, the cost is low, the refrigerating capacity is increased, the refrigerating efficiency is improved, so that the moisture content in the ambient air is not changed, and the servicelife of the finned pipe type heat exchanger is prolonged.

Description

technical field [0001] The present invention relates to the field of heat exchangers, and more particularly, to finned tube heat exchangers. Background technique [0002] A finned tube heat exchanger includes tubes and fins provided on the outer surfaces of the tubes. A number of designs for fins are known in the art, including serrated fin configurations. A sawtooth fin configuration can be formed on a pipe by creating serrations in a sheet of metal and then wrapping the sawtooth sheet around the pipe. In order to reduce costs, it is desirable to improve the heat transfer performance of finned tubes. An increase in heat transfer is generally associated with an increase in pressure drop in the system. Typically, increased heat transfer can be achieved by increasing flow turbulence or effective heat transfer area. It is possible to achieve higher heat transfer by increasing the turbulence level of the flow, but this increase is usually penalized by the increased pressure ...

AI Technical Summary

Problems solved by technology

However, serrated fins produce increased pressure drop and have less material and area for heat transfer than simple solid fins

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