The invention relates to a water electrolyser (2), comprising: an electrochemical cell (21) for electrolysis of water comprising a membrane / electrode assembly (31) with a face in communication with a supply volume of water. water (210); -the electrolyser comprises an external liquid water tank (8); -the electrolyser comprises a pipe (80) having a first connection (81) connected to the external tank (8) and a second connection ( 82) connected to the water supply volume (210), the first connection being located below the second connection; said water supply volume (210) comprises an exhaust circuit (211) putting the upper part of the water supply volume with the outside, and dimensioned to verify the following relationship: Pcech ≥ Pccon + (ρ * g * hv), with Pcech. Figure to be published with the abstract: Fig. 8
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机译：本发明涉及一种水电解器（2），其包括：用于电解水的电化学电池（21），其包括膜/电极组件（31），该膜/电极组件的表面与水的供应量相通。水（210）; -电解器包括外部液体水箱（8）; -电解器包括管道（80），该管道具有连接至外部水箱（8）的第一接头（81）和连接至供水空间（210）的第二接头（82），第一接头位于第二接头下方;所述供水容积（210）包括排气回路（211），其将供水容积的上部与外部连通，并且其尺寸确定为验证以下关系：Pcech≥Pccon +（ρ* g * hv），与Pcech。该图将以摘要形式发布：图8
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