| 主权项 |
1. A nitrous oxide gas mixer for generating a nitrous oxide gas mix, comprising:
at least one mixing chamber, within which an oxygen gas and a nitrous oxide gas are mixed together in respectively predeterminable volumes and/or mole contents to form the nitrous oxide gas mix, wherein the mixing chamber has at least one nitrous oxide gas connection and at least one oxygen gas connection, so that both the oxygen gas and the nitrous oxide gas are introduced into the mixing chamber via gas lines respectively mounted to these connections, at least one concentration controller, designed and provided for setting a mixing ratio between the oxygen gas introduced into the mixing chamber and/or the nitrous oxide gas introduced into the mixing chamber in the nitrous oxide gas mix in a predeterminable manner, at least one flow rate controller which a volume flow of the two gases can be respectively adjusted separately and/or together, wherein at least one O2 emergency button is mounted to the mixing chamber for emergency flooding the mixing chamber with the oxygen gas and/or with ambient air, wherein an on/off button of the nitrous oxide gas mixer is different from a control element, and the O2 emergency button can be depressed in an actuation direction, wherein a planar mounting surface of the O2 emergency button, in respect of which the actuation direction extends perpendicularly at least at a point in the mounting surface, is free from further control elements, and therefore there is no further control element located in the entire vicinity along and in the plane of the mounting surface, and wherein the mounting surface is an external surface of a mixing chamber housing, on which the O2 emergency button is located, or the mounting surface is an external surface of a control unit of the nitrous oxide gas mixer, wherein such a control unit is then located remote from the mixing chamber housing. |
