JPS5760139A - Hot water feeding equipment - Google Patents
Hot water feeding equipmentInfo
- Publication number
- JPS5760139A JPS5760139A JP13713180A JP13713180A JPS5760139A JP S5760139 A JPS5760139 A JP S5760139A JP 13713180 A JP13713180 A JP 13713180A JP 13713180 A JP13713180 A JP 13713180A JP S5760139 A JPS5760139 A JP S5760139A
- Authority
- JP
- Japan
- Prior art keywords
- thermistor
- caused
- water
- voltage
- freezing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Combustion (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
PURPOSE:To ensure safe operation of a hot water feeder even at the time when freezing of water or trouble of a thermistor is caused, by applying a thermistor voltage and a partial voltage of the thermistor and a resistance connected in series thereto to a voltage comparator of a circuit for detecting the temperature of hot water when freezing of water in the hot-water supply pipings is caused. CONSTITUTION:A voltage divided by resistors 3, 6 out of resistors 3, 4, 5, 6 connected respectively to one input terminals of voltage comparators 7, 8, 9, is applied to the voltage comparator 9, which produces a ''low'' output when a thermistor 2 detects 0 deg.C at which freezing of water is caused. Therefore, when is frozen, a transistor 15 is turned OFF and a safety solenoid valve 21 is closed, so that combustion is stopped. Further, if some trouble is caused with the thermistor 2 when the valve 21 is opened, combustion is also stopped since the value of resistance becomes infinite. Thus, it is enabled to prevent waterless heating of a boiler or other troubles even when freezing of water or trouble of the thermistor is caused, and hence to ensure safe operation of the hot water feeder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13713180A JPS5760139A (en) | 1980-09-30 | 1980-09-30 | Hot water feeding equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13713180A JPS5760139A (en) | 1980-09-30 | 1980-09-30 | Hot water feeding equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5760139A true JPS5760139A (en) | 1982-04-10 |
Family
ID=15191536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13713180A Pending JPS5760139A (en) | 1980-09-30 | 1980-09-30 | Hot water feeding equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5760139A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5582252A (en) * | 1978-12-14 | 1980-06-20 | Matsushita Electric Ind Co Ltd | Water heater |
-
1980
- 1980-09-30 JP JP13713180A patent/JPS5760139A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5582252A (en) * | 1978-12-14 | 1980-06-20 | Matsushita Electric Ind Co Ltd | Water heater |
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