Miniature brushless direct-current centrifugal water pump

Abstract

The invention discloses a miniature brushless direct-current centrifugal water pump. The miniature brushless direct-current centrifugal water pump comprises a shell, a stator, a rotor and an impeller; two ends of the shell are respectively provided with a water inlet and a water outlet; the water inlet is communicated with the water outlet to form a flow channel; a magnetic rotor which can be impacted by flow to rotate is arranged in the flow channel; the side of the magnetic rotor is provided with a Hall element and a control circuit board; the magnetic rotor and the Hall element form a water velocity sensor; the water velocity sensor and the control circuit board form a control switch for automatic start / stop of the water pump; therefore, a water valve of a water pipe is only required to be opened, water pressure is detected by the water velocity sensor, the water velocity sensor is matched with the control circuit board to realize the automatic start / stop of the water pump, a mechanical start / stop switch is not required to be arranged on the water pump, manual operation is not required, and the water pump delivers water more intelligently, is more convenient to use and realizes functions of increasing water pressure and improving the water supply condition for ultralow water pressure of solar water heaters, high-rise water heaters, high-rise water supply and rural water supply.

Description

technical field [0001] The invention relates to the technology in the field of water pumps, in particular to a miniature brushless DC centrifugal water pump, which can increase the water pressure and improve the water supply state for solar water heaters, high-rise water heaters, high-rise water supply, and rural water supply if the water pressure is too low. Background technique [0002] When the water pump is pumping water, the water level in the pool will gradually decrease. When the water level is lower than the working water level of the water pump, it is easy to cause the water pump to run idly. Continued high-speed operation will easily cause the water pump to heat up due to friction and damage the motor. In order to prevent the water pump motor from idling and protect the use of the motor, a control device to control the stop of the water pump motor is generally installed on the water pump. [0003] The traditional water pump motor control device is mostly a float s...

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Problems solved by technology

[0005] But the machine float switch of above-mentioned traditional structure controls the water pump motor to stop by detecting the water level. The water pump may stop working before reaching the lowest water level; secondly, the mechanical switch can only judge the level of the water level to control the stop of the water pump. When the water level is normal, it cannot make any adjustments to the abnormal working state of the pump motor. It reflects that it does not have the protection function to prevent the pump from stalling and running dry, which affects the service life of the pump. In addition, in the control circuit using mechanical switches, the strong and weak currents are connected together, and there is no anti-interference design, which cannot improve the electrical equipment. safety of use

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