| 摘要 |
PURPOSE: To prevent wash water of a sanitary washing system from showing an abnormal temperature even if there is something wrong with a control system. CONSTITUTION: A voltage VS at a connection between a thermister 21 which detects a temperature and a volume 32a of a volume section 32 and a reference voltage VREF at a connection between resistors 23 and 24 are compared with each other by a comparator 25 and then a temperature detection signal STC is sent out to a microcomputer 35. A resistance value of a resistor 34 is set to such a value that a temperature of the thermister 21 may be higher than the maximum temperature of water which can be set by the volume section 32 and it also may be a temperature which is not dangerous to users (an upper limit temperature). The voltage VS and a voltage VUL at a connection between the resistor 34 and the volume 32b are compared with each other by a comparator 33 and then the comparator 33 sends out a limit detection signal SLC to the microcomputer 35. When the signal SLC is high level 'H', the microcomputer 35 outputs a high-level 'H' signal HA independent of the signal STC and turns off a power supply of a heating section 31 for preventing heating of the heating section 31. |
