Water-gas linkage valve

Abstract

A water-gas linkage valve includes a water valve body assembly (1) with a high pressure water chamber (121), a gas valve body assembly (2), a linkage assembly (3) for connecting the gas valve assembly (2) with the water valve body assembly (1), and a low pressure water chamber (122). A gas outlet (32) is provided in the linkage assembly (3). The low pressure water chamber (122) is connected with the high pressure water chamber (121) by a venturitube (13). The low pressure water chamber (122) is provided in the water valve body assembly (1). A pressure transmission unit is formed when the water valve body assembly (1) is connected with the linkage assembly (3). The pressure transmission unit is isolated from the high pressure water chamber (121) and the low pressure water chamber (122) by a diaphragm (131,132). The linkage assembly (3) is controlled by the water valve body assembly (1) based on the change of the pressure difference between the high pressure water chamber (121) and the low pressure water chamber (122), and then the linkage assembly (3) controls the open and close of the gas in the gas valve body assembly (2). Since the high and low pressure water chambers (121,122) are isolated from the linkage assembly (3) by the diaphragm (131,132), it avoids the water directly touching with the metal parts of the linkage assembly and effectively prevents sediment incrustation and corrosion.

Description

technical field [0001] The invention relates to a water-gas linkage valve, in particular to a water-gas linkage valve used in a gas water heater to prevent fouling and corrosion inside a valve body. Background technique [0002] During the use of the gas water heater, the gas valve is controlled by the water valve. When the water valve is opened, the control gas valve is opened, and when the water valve is closed, the control gas valve is closed, so as to realize the synchronous switch of bath water and gas, that is, water-gas linkage . [0003] see figure 1 , is a cross-sectional view of a water-gas linkage valve in an existing gas water heater. The water valve body assembly 1' of the water-gas linkage valve includes a high-pressure water chamber 12', and the water valve body assembly 1' is connected with the linkage assembly 3' to form a low-pressure water chamber 14'. The space is separated by a differential pressure disc diaphragm 13', and the small linkage shaft 31' ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the air valve in the water-air linkage valve cannot be closed normally due to scaling and corrosion, the technical solution of the present invention is to provide a water-air linkage valve, which effectively solves the problem of water-air linkage caused by scaling and corrosion. The problem that the valve cannot be closed normally prevents the gas water heater from being damaged due to dry burning, and increases the safety performance of the gas water heater

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