Anti-frequent starting water pump

Abstract

The invention relates to a frequent start-preventing water pump. The frequent start-preventing water pump comprises a pump housing with a water inlet channel and a water outlet channel; an impeller driven by a motor to rotate is arranged in the pump housing; the frequent start-preventing water pump is characterized in that a pressure switch for controlling whether or not to start the motor by sensing the water pressure change in the pump housing is further arranged in the pump housing; a mounting base with a mounting cavity is arranged in the water inlet channel and the water outlet channel, a runner is mounted in the mounting cavity and capable of rotating around the own axis under the push action of the water flow in the water inlet channel or the water outlet channel, a magnet capable of rotating along with the runner is fixed in the runner, and a hall switch for controlling whether or not to start the motor is arranged on the mounting base. According to the frequent start-preventing water pump, once in a normal working state, the runner always rotates and the magnet is enabled to sense the hall switch as long as water flows out of the water outlet channel, and therefore, the motor is enabled to be under the working condition all the time, and consequently, the frequent start problem of the motor can be thoroughly solved and the motor can be effectively protected.

Description

technical field [0001] The invention relates to a water pump for water supply, in particular to a water pump for preventing frequent starting. Background technique [0002] A water pump is a device that conveys water flow through the rotation of a motor, and an automatic water pump refers to a water pump whose water flow is automatically controlled. In order to realize the automatic control of the water pump, a pressure switch is generally installed at the water outlet of the pump body. It cooperates with the check valve (one-way valve) installed at the water inlet pipe to achieve the effect of automatic shutdown. The pressure switch is It is used to sense the hydraulic pressure in the outlet pipe. When the hydraulic pressure in the outlet pipe is higher than the set value, the power supply of the pump motor is cut off, and the motor stops rotating. When the hydraulic pressure in the pipeline is lower than the set value, the power supply of the motor is turned on. For examp...

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Problems solved by technology

In the existing water pumps, there are mainly the following ways to solve the frequent start-up, which is to install an air tank on the pump body to buffer the pressure change and supplement the water flow. The action of the air tank on the pressure switch can prolong the interval between pump start-ups. To achieve a certain purpose of preventing frequent starts, but after the liquid in the pump body is released, due to the release of the pressure of the air tank, there will still be situations such as short water pipes, use of hoses, and small water flows, which will cause frequent starts of the pump, affecting Motor life and water pressure instability

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