Negative pressure valve and water dispenser with negative pressure valve

Abstract

The invention discloses a negative pressure valve, which comprises a valve body axially provided with a water inlet end, a valve chamber and a water outlet end, a valve core is arranged in the valve chamber, and a piston rod is movable in the valve core. The core is axially provided with an opening connected with the water outlet, the piston rod is a hollow tube, one end is provided with a water inlet connected with the water inlet, and the other end is provided with a water outlet, and the piston rod slides axially elastically Set in the spool. The invention also discloses a water dispenser, which comprises the aforementioned negative pressure valve. In the negative pressure valve of the present invention, when negative pressure is generated at the water outlet, the piston rod is opened to realize the water supply of the water dispenser. , When the water outlet end of the negative pressure valve returns to normal pressure, the piston rod will move to close, stop the water supply to the water dispenser, and play the role of interception.

Description

technical field [0001] The invention relates to the field of water dispensers, in particular to a negative pressure valve used in a water dispenser and a water dispenser with the negative pressure valve. Background technique [0002] Water dispensers usually include two types of water tanks and no water tanks. The water source with a water tank is usually without pressure, so it needs to be supplied by a booster pump. The booster pump has a short life and is difficult to use in commercial occasions; It is sufficient to use an ordinary water pump for water supply, but because the flow needs to be adjusted, an additional flow regulating valve and a one-way valve need to be installed, which has a complicated structure and high cost. [0003] The water supply parts of the above two types of water dispensers cannot be used in common use, which leads to great difficulty and high development cost for enterprises. Contents of the invention [0004] The purpose of the present inve...

AI Technical Summary

Problems solved by technology

[0002] Water dispensers usually include two types of water tanks and no water tanks. The water source with a water tank is usually without pressure, so it needs to be supplied by a booster pump. The booster pump has a short life and is difficult to use in commercial occasions; Ordinary water pumps can be used for water supply, but due to the need to adjust the flow, it is necessary to install additional flow regulating valves and check valves, which are complex in structure and high in cost

[0003] The water supply part of the above two types of water dispensers cannot be used in common, which makes the development of enterprises difficult and costly

Images