| 摘要 |
PURPOSE:To effectively suppress the heat generation of a motor for driving a circulation pump and to always hold a liquid temperature in tanks at a constant level by synchronizing the work of the circulation pump with the current supply time of a heater. CONSTITUTION:A display device 300, a signal processing part 400 and an operation part 500 are arranged on a printer 10 in an image recording device and a color developing tank 110, a bleaching and fixing tank 120, and the 1st and 2nd tanks 130, 140 are arranged in an automatic developing device 100. A driving motor 178 and a heater 180 built in a circulation pump of the device 100 are connected to a common AC power supply 179 through a power supply switch 173. Liquid temperature detecting signals of respective tanks 110, 120, 130, 140 which are detected by a temperature sensor 170 are supplied to a temperature control circuit 171 and a switch control circuit 172 is controlled by a control signal outputted from the circuit 171. Since the current supply time for driving the pump is synchronized with that of the heater 180, the heat generation of the motor driving the pump can be suppressed and the liquid temperature in the tanks can be always held at a fixed level.
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