Murphy's pipe for prohibiting air input

The utility model discloses an air input prohibiting Murphy's tube, relates to the technology of medical consumables, and aims to solve the problems that an infusion tube which is a medical consumable is only disposable for a patient and cannot be reused for multiple times, so that the manufacturing cost is too high when a one-way valve is additionally arranged for blocking air at present, and the infusion tube cannot be reused for multiple times. According to the technical scheme, the heat exchanger is characterized by comprising a pipe body, an inlet and an outlet are formed in the pipe body, the horizontal height of the outlet is lower than that of the inlet, a flowing channel between the inlet and the outlet is formed in the pipe body, and the horizontal height of the end, communicated with the inlet, of the flowing channel is lower than that of the end, communicated with the outlet, of the flowing channel. And the liquid in the inlet, the flowing channel and the outlet flows up and down. According to the