Household hydrogen machine

The utility model belongs to the technical field of hydrogen machines, and particularly relates to a household hydrogen machine which comprises a shell, a water tank, a power supply battery and a water electrolyser, a main control circuit board, an alarm and a hydrogen sensor are further arranged in the shell, the power supply battery, the alarm and the hydrogen sensor are all electrically connected with the main control circuit board, and when the hydrogen sensor detects that the hydrogen concentration inside and outside the shell exceeds a threshold value, the main control circuit board controls the alarm to give an alarm and/or controls the water electrolyser to be powered off. According to the structure in the scheme, the problem of hydrogen explosion can be prevented and completely eradicated, and the safety and comfort of daily use of the hydrogen machine by people are improved. The explosion limit of hydrogen in the air is 4%-75.6%, and when the hydrogen concentration in a closed space or place suddenl