GAS-LIQUID SWITCHING VALVE AND ENDOSCOPE

The present application provides a gas-liquid switching valve and an endoscope, which can prevent liquid from flowing out of the switching valve, contributing to improving its safety performance. The gas-liquid switching valve includes a valve body, a valve core assembly, and a liquid-proof and gas-permeable member. The valve core assembly is movably disposed in a valve cavity, and the valve core assembly is provided with a communication channel for communicating with an external environment. When the valve core assembly is moved to a first position, a liquid path between a liquid inlet and a gas-liquid outlet is blocked, and a gas path between a gas inlet and the gas-liquid outlet is unblocked, and at this time, the communication channel is blocked so that the gas-liquid switching valve is in a gas supply state. When the valve core assembly is moved to a second position, the gas path between the gas inlet and the gas-liquid outlet is blocked, and the liquid path between the liquid inlet and the gas-liquid outlet is unblocked, so that the gas-liquid switching valve is in a liquid supply state. The liquid-proof and gas-permeable member is disposed in the communication channel, and is configured to prevent liquid from passing through the communication channel and allow gas to pass through the communication channel.