LIQUID ADDING STRUCTURE

Disclosed is a liquid adding structure comprising: a body provided with a liquid storage cavity and a liquid adding opening; a liquid inlet connector having a liquid inlet channel communicated with the liquid storage cavity; a push-out part is provided on the side of the liquid inlet connector away from the liquid storage cavity; a connecting piece, the connecting piece comprising a first sealing part, the first sealing part moving between an open position and a closed position; wherein, in the process of a liquid adding bottle and the liquid inlet connector entering into insertion connection, a second sealing part opens the bottle opening under the action of the push-out part, the liquid adding bottle drives the first sealing part to move to the open position, causing the liquid adding bottle to be communicated with the liquid inlet channel, and after the liquid adding bottle is separated from the liquid inlet connector, the first sealing part is reset to the closed position, causing the liquid inlet channel