Exhaust device for floor heating pipe

The invention relates to the technical field of floor heating equipment, and discloses a floor heating pipe exhaust device which comprises a water inlet pipe and a water return pipe, the water inlet pipe is provided with a water inlet distribution pipe, and one end of the water return pipe is provided with a water return valve. The inner discharge pipes which are equally distributed are arranged in the water return pipe, single water return branch pipes are installed in the branch cavities respectively, then exhaust is conducted at the same time, the branch pipes do not need to be opened one by one for troubleshooting, the exhaust time is greatly shortened, and meanwhile in order to avoid the situation that a valve is closed by measuring the temperature manually, the exhaust efficiency is improved. The shape of the second expansion alloy at different temperatures is used for opening and closing the water flow channel, once hot water exists in the water flow channel, water flows into the water bag, the water b