| 摘要 |
PURPOSE:To improve low temperature resistance of the pump in the caption so as to aim at improvement in reliability of the electric pump by providing, in the neighborhood of the pump a heater for increasing the temperature in a protecting cover through a temperature sensing switch for detecting the temperature of a motor at a lot temperature. CONSTITUTION:Pumping system appliances consisting of a storage pump 1 directly connected to an electric motor 2, a suction pipe 3, a non-return valve 4, a pressure chamber 11, a delivery pipe 13, an accumulator 16, a pressure switch 17 and a flow switch 18 are installed on the same base 34 and the upper portion of the appliances is protected with a protecting cover 35. And, a temperature sensing switch 9 for detecting the temperature of the motor 2 and a ceramic heater 7 held by a holding member 8 are provided for increasing the temperature in the protecting cover 35 by a closing the temperature sensing switch 9 to send an electric current to the heater 7 at a low temperature. And, a gap is formed between a delivery valve 13 and the base 34 to insulate the heat conduction from the base 34. Thereby, the improvement in cold temperature resistance is aimed and the electric pump can be statably and reliably operated.
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