Title:
METHOD FOR DETECTING BATHWATER REMAINING IN BATHTUB IN FULL AUTOMATIC HOT-WATER SUPPLIER
Document Type and Number:
Japanese Patent JP3110149
Kind Code:
B2
Abstract:
PURPOSE: To enable finding out whether or not bathwater remains in a bathtub by a method wherein water heated to a higher temperature than the temperature level appropriate for bathing is run through a circulating line and a change in the temperature in the circulating line before and after the start of a circulating pump is detected.
CONSTITUTION: After heating water in a drum 2a to 70-80°C by a burner 6, a bathwater feed valve 12 in a hot-water supply line 10 is opened so that the heated water flows through lines 13, 14 and into both the bathtub 1 and a heat- exchange pipe 15 in a hot-water heater 2. The heated water run through the heat-exchange pipe 15 flows as circulating water through a three-way valve 7 and into the bathtub 1 by a lower circulating port 1b. Then a bath thermistor 5 provided in a circulating line 4 shows a rise in temperature to 60-70°C, thus functioning to detect the temperature in the circulating line 4. After starting a circulating pump 3 subsequently, by detecting a change in the temperature at this bath thermistor 5 it can be judged whether or not bathwater remains in the bathtub 1.
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Inventors:
Shuji Higo
Application Number:
JP10868092A
Publication Date:
November 20, 2000
Filing Date:
March 31, 1992
Export Citation:
Assignee:
Chofu Industry Co., Ltd.
International Classes:
F24H1/00; (IPC1-7): F24H1/00
Domestic Patent References:
| JP4283349A | ||||
| JP49547A |
Attorney, Agent or Firm:
Fujio Nakamae (1 outside)