The invention relates to the field of electrochemical production of disinfectants, where a solution of alkaline metals is used as the electrolyte in the anode chamber. The invention offers a new design for electrolyzers, reducing power consumption in the production of disinfectants by known methods. As a result of this invention, power consumed in the production of 1 gram of active chlorine by known methods will be reduced by 20%, and the possibilities for producing disinfectants with active chlorine content 7500 ppm in an electrolyzer without channelling the water into external cooling devices will also expand.