JPH01175629U

JPH01175629U -

Info

Publication number: JPH01175629U
Application number: JP6971888U
Authority: JP
Priority date: 1988-05-26
Filing date: 1988-05-26
Publication date: 1989-12-14

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す電気湯沸かし
器の一部切欠した断面図、第２図はその回路図、
第３図はそのマイクロコンピユーターに格納され
たプログラムのフローチヤート、第４図はその超
音波センサーの信号処理ブロツク図、第５図はそ
のタイミングチヤート、第６図は従来の電気湯沸
かし器の一部切欠した断面図。２……容器、４……発熱体、７……制御手段、
９……超音波センサー、１９……タイマーセツト
手段。 Fig. 1 is a partially cutaway sectional view of an electric water heater showing an embodiment of the present invention, Fig. 2 is its circuit diagram,
Figure 3 is a flowchart of the program stored in the microcomputer, Figure 4 is a signal processing block diagram of the ultrasonic sensor, Figure 5 is its timing chart, and Figure 6 is a partial cutout of a conventional electric water heater. Cross-sectional view. 2... Container, 4... Heating element, 7... Control means,
9...Ultrasonic sensor, 19...Timer setting means.

Claims

[Scope of utility model registration request]

It has a container 2 that stores water, a heating element 4 that heats and boils the water in the container 2, and a control means 7 that detects boiling and controls energization to the heating element 4 to maintain a warm state. In the electric water heater, the amount of water in the container 2 is detected by an ultrasonic sensor 9 provided on the bottom of the container 2, and the ultrasonic sensor 9 is connected to the control means 7, and the control means 7 is further provided with a timer setting means 19. When connected and the timer is set, calculate the time until the water in the container 2 boils based on the detected water volume, subtract the time until the water boils from the timer set time, and subtract it from the time when the timer is set. A control means 7 starts energizing the heating element 4 after the timer set time has elapsed, and controls the water to be boiled after the timer set time elapses.
An electric water heater characterized by the following.