To provide a water heater capable of saving power by terminating continuous energization to a water level sensor without degrading a bath piping cleaning function.
A cycle Ts of determining the water level of a bathtub is set at each operation mode; and a control means stores a total time Ta of a determination processing time Td required for executing a water level determination process and a sensor stabilization wait time Tw preset as a time until the output of the water level sensor is stabilized, compares the total time Ta with the water level determination cycle Ts of the current operation mode in every operation mode, stops power feed to the water level sensor during Tb from the completion of the water level determination process to the next water level determination process when the water level determination cycle Ts is longer than the total time Ta, and keeps a power feed state to the water level sensor when the water level determination cycle Ts is not longer than the total time Ta.
| JPS5812050 | 【考案の名称】温水ウオツシヤ-タンク |
| JP2009092323 | HEAT PUMP WATER HEATER |
| JP2520484 | [Name of device] Backflow prevention device for automatic bath kettle |
KIMURA KOJI
YASUFUKU HIRONOBU
NARUSE YOSHINARI
YAMAUCHI KOICHIRO
YOSHITAKA YUTAKA
SHIMIZU SHIRO
NORITZ ELECTRONICS TECH KK
Kiyoshi Samukawa
Next Patent: MINI-ENVIRONMENT DEVICE, INSPECTION DEVICE, MANUFACTURING DEVICE, AND SPACE CLEANING METHOD