Title:
STORAGE WATER HEATER
Document Type and Number:
Japanese Patent JP2017172944
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To shorten a freezing preventive circulation operation while preventing freeing of on-off valves of a water discharge pipe and a branch pipe that are located in a lower portion of a can body.SOLUTION: A first section 11A of a heat pump return pipe 11 from a refrigerant-water heat exchanger 13 to a three-way valve 5 and a return bypass pipe 7 from the three-way valve 5 to a water supply pipe 9 in a lower portion of a can body 2 comprise copper pipes, and a second section 11B of the heat pump return pipe 11 from the three-way valve 5 to an upper portion of the can body 2 comprises an SUS pipe. Thus, this configuration secures relatively large heat radiation amount in the first section 11A and the return bypass pipe 7, and suppresses cooling from outside of the pipes in the second section 11B while preventing freezing of a drain valve 60, an emergency water intake plug 58, a can body protection valve 61 and a water shut-off valve 46, so as to shorten a circulation operation.SELECTED DRAWING: Figure 1
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Inventors:
MORITA MAKOTO
SHIGA HIROKI
YACHITA TAKAAKI
SASAKI MASARU
SHIGA HIROKI
YACHITA TAKAAKI
SASAKI MASARU
Application Number:
JP2016062519A
Publication Date:
September 28, 2017
Filing Date:
March 25, 2016
Export Citation:
Assignee:
CORONA CORP
International Classes:
F24H1/18
Attorney, Agent or Firm:
Hirofumi Masuda
Hiroyuki Masuda
Hiroyuki Masuda
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