JPH0383765U

JPH0383765U -

Info

Publication number: JPH0383765U
Application number: JP14414489U
Authority: JP
Priority date: 1989-12-15
Filing date: 1989-12-15
Publication date: 1991-08-26

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の罐体構造を示す図
、第２図は本考案の一実施例のブロツク図、第３
図は本考案の一実施例のタイミングチヤートであ
る。１……罐体、３……給水弁、６……排水弁、７
……電気ヒータ、８……ヒータスイツチ、１３…
…温度制御回路、１７……ドレーン排出制御回路
、１８……ヒータ制御回路、１９……給水弁制御
回路、２０……排水弁制御回路。 Fig. 1 is a diagram showing a housing structure of an embodiment of the present invention, Fig. 2 is a block diagram of an embodiment of the invention, and Fig. 3 is a diagram showing a housing structure of an embodiment of the present invention.
The figure is a timing chart of one embodiment of the present invention. 1... Housing, 3... Water supply valve, 6... Drain valve, 7
...Electric heater, 8...Heater switch, 13...
... Temperature control circuit, 17 ... Drain discharge control circuit, 18 ... Heater control circuit, 19 ... Water supply valve control circuit, 20 ... Drain valve control circuit.

Claims

[Claim for Utility Model Registration] When the temperature of the water or hot water stored in the housing is lower than a preset temperature, the temperature control circuit outputs an energization signal to close the heater switch. In an electric water heater that heats the water or hot water and maintains it at a predetermined temperature by energizing an electric heater, a drain discharge control circuit that outputs a drain discharge signal for a predetermined period of time, periodically or at any time; , installed between the temperature control circuit and the heater switch, and while the drain discharge control circuit is outputting the drain discharge signal, the output of the energization signal output by the temperature control circuit is cut off. ,
a heater control circuit that cuts off power to the electric heater; and a drain discharge control circuit that stops outputting a water supply signal and closes a water supply valve when a predetermined period of time has elapsed since the drain discharge control circuit outputs a drain discharge signal; a water supply valve control circuit that outputs the water supply signal to open the water supply valve a predetermined time before the drain discharge control circuit stops outputting the drain discharge signal; When stopping the output of the water supply signal, outputting a drain signal to open the drain valve, and when the drain discharge control circuit stops outputting the drain discharge signal, stopping the output of the drain signal, and a drain valve control circuit for closing the drain valve, and when the drain discharge control circuit outputs a drain discharge signal, the drain valve opens after cooling the hot water in the housing, Before all the water or hot water in the housing is discharged to the outside and the drain discharge control circuit stops outputting the drain discharge signal, the water supply valve is opened while the drain valve is open. An electric water heater that opens to clean the inside of the housing.