Heat exchanger and heat transfer tube of the heat exchanger

Patent metadata

Field	Value
Publication number	US-10126075-B2
Application number	US-201514609825-A
Country	US
Kind code	B2
Filing date	Jan 30, 2015
Priority date	Mar 31, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A heat exchanger has a tubular structure inside of which a medium flows. The heat exchanger includes a liquid film removal structure and a liquid film flowing-down assistance structure. The liquid film removal structure is joined to the tubular structure. The liquid film flowing-down assistance structure is coupled directly to the liquid film removal structure and is arranged between the tubular structure and an adjacent tubular structure and in parallel to the tubular structure.

First claim

What is claimed is:

1. A heat exchanger, comprising:
a plurality of tubular structures;
liquid film removal structures joined to the tubular structures; and
liquid film flowing-down assistance structures that are coupled directly to the liquid film removal structure and that is arranged between the tubular structure and an adjacent tubular structure and in parallel to the tubular structure, wherein
a number of the liquid film flowing-down assistance structures is eight per each tubular structure, and
each tubular structure is configured such that, along a longitudinal direction of the heat exchanger, the liquid film removal structures on a first side of each tubular structure are offset with respect to the liquid film removal structures on a second side of each tubular structure that is opposite to the first side, and
along a longitudinal direction of the heat exchanger each of the liquid film removal structures in one of the plurality of tubular structures is positioned at a same position as each of the liquid film removal structures in another of the plurality of tubular structures immediately adjacent thereto.

2. The heat exchanger according to claim 1 , wherein the liquid film flowing-down assistance structures are made of a material with higher wettability than the liquid film removal structures and is installed at an end part of the liquid film removal structures.

3. The heat exchanger according to claim 1 , wherein an installation interval of the liquid film removal structures decreases downwardly.

4. The heat exchanger according to claim 3 , wherein the liquid film removal structures have different heights.

Assignees

• Hitachi Ltd

Inventors

• Tamura Akinori
• Ishida Naoyuki
• Kito Kazuaki

Classifications

• F28D7/16

  the conduits being arranged in parallel spaced relation ({F28D7/0008 - F28D7/0058 take precedence}; F28D7/02 - F28D7/10 take precedence) · CPC title

• F28F13/04 Primary

  by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation {(F28F13/18 takes precedence)} · CPC title

• F28F17/005

  Means for draining condensates from heat exchangers, e.g. from evaporators (F28B9/08 takes precedence) · CPC title