HOT-WATER SUPPLY APPARATUS

Japanese Patent JP3801274

B2

PROBLEM TO BE SOLVED: To contrive that hot water in a heat transfer pipe is hardly overheated and hence scale is scarcely produced in the heat transfer pipe by providing a shielding mechanism for closing a return passage located upstream a bypass passage when supply hot water from a further building heat exchanger is supplied to the bypass passage.
SOLUTION: A second bypass 24 is provided for connecting a position located between a circulation pump 70 of a return pipe 22 and a two-way valve 58 with a supply pipe 23 as a bypass passage for circulating and returning supply hot water from a heat exchanger 2 for bath additional heating to the return pipe without passage through a bathtub 100, and a three-way valve 59 is provided on a connection part between the second bypass pipe 24 and the supply pipe 23. Hereby, it is changed over to supply the supply hot water from the heat exchanger 2 for additional heating to the bathtub 100 or to supply the same to the second bypass pipe 24. Further, when the supply hot water from the heat exchanger 2 is supplied to the second bypass pipe 24, the two-way valve 58 serves as an interruption mechanism for closing the return passage 22 upstream of the second bypass pipe 24.

JPH05161562	STRUCTURE OF BATHTUB
JP6653219	Hot water supply system
JP2001272105	BATH APPARATUS

Tetsuji Morita
Shigenobu Okuda
Yu Enomoto
Mitsuru Tanaka
Hiroshi Imada
Nakanishi

JP27313496A

July 26, 2006

October 16, 1996

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OSAKA GAS CO.,LTD.

F24H1/00; F24D17/00; (IPC1-7): F24H1/00; F24D17/00

JP7269945A
JP8159553A

Shuichiro Kitamura

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