Pressure barrel of RO water purifier

Abstract

The invention belongs to the field of household water purifiers and particularly relates to a pressure barrel of an RO water purifier. The pressure barrel of the RO water purifier comprises a pressure barrel body, the top end of the pressure barrel body is provided with a feeding / discharging opening, and the feeding / discharging opening is furthermore provided with pressure limiting valve for preventing overpressure; the pressure limiting valve comprises a valve seat, a ball valve core and a piston assembly for driving the ball valve core to rotate; the piston assembly comprises a permanent magnetic piston, a valve rod for driving the ball valve core to rotate and a permanent magnetic pressing ring; one end of the valve rod is fixedly connected with the ball valve core, the other end of the valve rod is in rotation fit with the permanent magnetic piston, and the permanent magnetic pressing ring is arranged outside the valve rod in a sleeve manner; the permanent magnetic piston corresponds to the permanent magnetic pressing ring in position, and the magnetic pole of the permanent magnetic piston is repulsive to the magnetic pole of the permanent magnetic pressing ring; and the permanent magnetic piston is installed in a piston assembly installation cavity in a sealed manner, and the pressure input face faces the output end of a bypass passage. According to the pressure barrel, when the pressure barrel is filled with water to generate water injection pressure, the pressure limiting valve turns off a water inlet, so that continuous increase of the pressure in the barrel is limited, and cracking of the pressure barrel is prevented.

Description

technical field [0001] The invention belongs to the field of household water purifiers, in particular to a water storage pressure barrel in an RO water purifier. Background technique [0002] The pressure tank is mainly used to store water in household RO water purifiers, and generally bears relatively high pressure. With the fierce competition, the price of pressure barrels has dropped, and plastic barrels have continued to replace steel barrels. In the existing market, in order to save costs, the plastic wall of the plastic pressure barrel is made relatively thin. Due to the influence of the manufacturing process and the overload of water storage, the plastic pressure tank will gradually expand. Every year, there will be plastic pressure tanks that are difficult to withstand pressure and cause explosions, causing danger to the home kitchen and causing huge compensation losses for the manufacturer. [0003] However, facing the pressure of competition, many manufacturers a...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor safety of the existing pressure tank, and provide a pressure tank of RO water purifier. When the water in the pressure tank is filled up to generate water injection pressure, the pressure limiting valve closes the water inlet, thereby limiting The pressure in the barrel continues to increase to prevent the pressure barrel from bursting; when the external pressure of water injection is removed, it will automatically open and become normally open

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