TWI814879B

The present invention provides a cold and hot water mixing valve that can reduce the number of O-ring and suppress the damage of the O-ring. The mixing valve mechanism of the cold and hot water mixing valve is at least equipped with: a casing 22 made of resin; a hot water inlet A formed at the front end portion of the casing 22 and communicated with the hot water supplying port; a hot water valve seat 22d disposed at the hot water inlet A of the casing 22; a cold water inlet B formed at the housing 4 and allowing cold water to flow therein; a cold water valve seat 4d disposed at the cold water inlet B of the housing 22; a control valve body 25 made of resin, which is provided with a valve body 25a abutted against the hot water valve seat 22d and the cold water valve seat 4d and performs an opening degree adjustment of the hot water inlet A and the cold water inlet B; an O-ring 24 which is disposed between the hot water inlet A and the cold water inlet B, separating the hot water inlet A from the cold water in