Constant pressure pump

Abstract

The invention relates to the technical field of pumps, in particular to a constant pressure pump. According to the constant pressure pump, the bottom end of a water pump is connected with a variable frequency motor, the water outlet end of the water pump is provided with a pressure sensing device, the pressure sensing device is connected with a controller, one end of the controller is connected with a power supply, and the other end of the controller is connected with the variable frequency motor; and the pressure sensing device comprises an upper shell, a lower shell, an adjusting screw, a cushion block, a pressure sensing film and an elastic membrane, the bottom of the upper shell is connected with the lower shell, the elastic membrane is arranged at the inner side of the lower shell, the pressure sensing film is arranged at the upper end of the elastic membrane, the cushion block is arranged at the upper end of the pressure sensing film, the upper end of the cushion block makes contact with the adjusting screw, the adjusting screw is connected with the upper shell, and the pressure sensing film is connected with the controller. By adopting the technical scheme, the constant pressure pump has the beneficial effects that the output speed of the motor can be automatically adjusted according to different pressures, the output pressure of the water pump is constant, and the service life of a water feeder is prolonged.

Description

technical field [0001] The invention relates to the technical field of pumps, in particular to a constant pressure pump. Background technique [0002] Diaphragm pump, also known as control pump, is the main type of actuator. By receiving the control signal output by the adjustment control unit, it uses power operation to change the fluid flow. The role of the diaphragm pump in the control process is to accept the control signal of the regulator or computer, change the flow rate of the regulated medium, and maintain the regulated parameters within the required range, so as to achieve the automation of the production process. If the automatic adjustment system is compared with the manual adjustment process, the detection unit is the human eye, the adjustment control unit is the human brain, and the execution unit—diaphragm pump is the human hands and feet. [0003] At present, common water purifiers on the market can be divided into pipe pressure type (the water source is mun...

AI Technical Summary

Problems solved by technology

With the development of logistics, both models may be used in opposite scenarios.

However, when the pipe-pressed water purifier is used in an area with no tap water or low water pressure, it may fail to produce water or the amount of water produced is seriously insufficient.

However, if the self-priming water purifier is used under the municipal tap water source, the working pressure of the water purifier will be too high, which may cause poor water leakage to the entire water purifier system and affect the life of the RO membrane.

[0004] However, most buildings in China still have secondary water supply. Water tanks are installed on the floors, and then water pipes are connected to each house. Therefore, there will be a large difference in water pressure between different floors of the same building, and this phenomenon occurs on different floors. Using a water purifier will result in a large difference in the water inlet pressure of the water purifier, resulting in insufficient pressure on the upper floor and higher pressure on the lower floor

As a result, when the water purifier works on a higher floor, the flow rate is insufficient, the water production efficiency is low and power consumption is low, and the use of the water purifier on the lower floor will lead to high working pressure, which will affect the service life of the water purifier. Leading to excessive pressure of the whole machine and water leakage

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