Pressure balance valve

Abstract

The invention provides a pressure balance valve which can be mounted in a water discharge device. The pressure balance valve comprises a valve element cavity, a valve element, at least one elastic ring and at least one second elastic ring, wherein the peripheral wall of the valve element cavity is provided with an external cold water inlet, an external hot water inlet, an external cold water outlet and an external hot water outlet; the valve element is provided with a pressure sensing wall, a first ring part and a second ring part and defines a cold water pressure cavity and a hot water pressure cavity, the first ring part is provided with an internal cold water inlet and an internal cold water outlet, and the second ring part is provided with an internal hot water inlet and an internal hot water outlet; each first elastic ring is positioned in a first positioning ring groove in an embedded manner; each second elastic ring is positioned in a second positioning ring groove in an embedded manner. Due to the fact that the first and second elastic rings can be extruded to deform under water pressure so as to fill into gaps between the valve element and the valve element cavity, large fit tolerance can be allowed, valve element surface roughness requirements can be lowered, and machining and manufacturing cost is lowered greatly.

Description

technical field [0001] The invention relates to a component of a water outlet device, in particular to a pressure balance valve applied in a temperature-controlled faucet. Background technique [0002] Pressure balance valves are widely installed in various water outlets, especially in traditional or digital shower systems. Related patent technical documents, such as US Patent No. US8,267111B2, Publication No. US2013 / 0042923A1, and US2012 / 0138177 Patent Cases, all disclose a pressure balance valve applied to a digital shower system. [0003] The above-mentioned water outlet device is usually a temperature-controlled faucet, and includes a temperature-controlled valve, and a temperature-sensing component matched with the temperature-controlled valve; Component detection, properly adjust and control the mixing ratio of cold and hot water, so that the temperature of the mixed water meets the needs of the shower. [0004] The above-mentioned temperature control valve mainly co...

AI Technical Summary

Problems solved by technology

In order to meet the above requirements, the fit gap between the outer surface of the valve core and the inner surface of the valve housing must be less than 0.03mm, and the surface must be fairly flat and smooth, so that the dimensional precision of mutual fit and the roughness requirements of the inner and outer surfaces are quite high, and usually must rely on high-precision processing equipment and subsequent grinding to meet this requirement, so the processing and manufacturing costs are quite high, and the production efficiency is also limited

If the above-mentioned high precision and roughness requirements cannot be met, the performance of the pressure balance valve will also be poor. This is a long-standing problem with existing pressure balance valves, but there is no simple, feasible and effective technical solution

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