Title:
HEAT EXCHANGER, HOT WATER SUPPLY SYSTEM, AND MANUFACTURING METHOD OF HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP2016205683
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive heat exchanger having sufficient corrosion resistance, a hot water supply system, and a manufacturing method of the heat exchanger.SOLUTION: A heat exchanger 3 includes a first tube 31 in which water flows, and a second tube 32 which is extended along the first tube 31 from an inlet to an outlet of the first tube 31 and heats the water so that a water temperature is gradually increased toward a downstream side by making a refrigerant flowing therein exchange heat with the water. In the first tube 31, a region including a water inlet side is a high corrosion-resisting region 311 made of a material relatively high corrosion resistance, and a region connected to a downstream side of the high corrosion-resisting region 311 and including a water outlet side is a low corrosion-resisting region 312 made of a material having relatively low corrosion resistance.SELECTED DRAWING: Figure 2
Inventors:
MAENO MASASHI
Application Number:
JP2015086252A
Publication Date:
December 08, 2016
Filing Date:
April 20, 2015
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F28D7/02; F24H1/00; F28F19/06
Attorney, Agent or Firm:
Ryuichiro Mori
Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma
Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma