Energy-saving DC frequency conversion water pump and its control method

Abstract

The invention discloses an energy-saving DC variable frequency water pump and a control method thereof. The energy-saving DC variable frequency water pump comprises a DC brushless motor, a support, an impeller, a sensing assembly, a driving circuit board, a front end cover and an electrical box. The DC brushless motor is fixed on the support, and the impeller is arranged on a driving shaft of the DC brushless motor. The front end cover covers the impeller, and the sensing assembly is arranged in the DC brushless motor. The driving circuit board is arranged at the end face of the tail portion of the DC brushless motor, and the electrical box covers the driving circuit board. The energy-saving DC variable frequency water pump is ingenious and reasonable in structural design; the sensing assembly and the driving circuit board are designed in a split structure mode, so that assembling and maintaining are facilitated, the occupied space is effectively reduced, and the size is decreased. Meanwhile, the DC brushless motor is used for driving, so that the working efficiency is high, the water supply amount is large, and the size is small. Moreover, under the control of the driving circuit board, the energy-saving DC variable frequency water pump has the functions of overload protection, overcurrent protection, short-circuit protection and the like, and has the advantages of being capable of guaranteeing normal operation, good in working stability, capable of effectively prolonging the service life, and beneficial to wide application and popularization.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to an energy-saving DC frequency conversion water pump and a control method thereof. Background technique [0002] A pump is a machine that transports or pressurizes a liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsions, suspoemulsions and liquid metals, etc., and can also transport liquid and gas mixtures. and liquids containing suspended solids. [0003] Most of the existing water pumps use AC induction motors as power devices. Although they can achieve the purpose of driving, the working efficiency is low and the volume is large. Moreover, the traditional sensing circuit and driving circuit are all set on the same circuit board, which not only takes up space Large and inconvenient for assembly and main...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing water pumps use AC induction motors as power devices. Although they can achieve the purpose of driving, the working efficiency is low and the volume is large. Moreover, the traditional sensing circuit and driving circuit are all set on the same circuit board, which not only takes up space Large and inconvenient for assembly and maintenance

In addition, the working state cannot be changed according to the external conditions. In severe cases, there will be a short circuit, which will cause the pump to not work normally and greatly shorten the service life of the pump.

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