Title:
PUMP UNIT
Document Type and Number:
Japanese Patent JP2016044557
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make the invention relate to feed water equipment, in particular, to operation control of a household well water pump, and to solve the problem that the conventional invention leaves a temperature-rise preventing method of a repetitive operation pump unit out of consideration in a small quantity water leakage generation state or small quantity water usage.SOLUTION: A pump unit comprises: an inlet port for taking water in; a delivery port for blowing the water out; a centrifugal impeller for giving momentum to the water; a casing mounting the impeller inside; a motor for rotating the impeller; temperature detection means mounted on an exterior wall of the casing for detecting the temperature of the casing; and a control part for controlling the motor, in which when the temperature detected by the temperature detection means rises above the predetermined value, the percentage of drive time in an operation cycle of the motor is reduced smaller than that at the time of normal operation.SELECTED DRAWING: Figure 1
Inventors:
HORIKANE YOSHIKATSU
Application Number:
JP2014167089A
Publication Date:
April 04, 2016
Filing Date:
August 20, 2014
Export Citation:
Assignee:
HITACHI APPLIANCES INC
International Classes:
F04D15/00
Attorney, Agent or Firm:
Manabu Inoue
Yuji Toda
Shigemi Iwasaki
Yuji Toda
Shigemi Iwasaki
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