The purpose of the research is to develop a mechanized boiler lid design that allows the lid to be opened by a rotating method. Comparative analysis of ways to improve the designs of jacketed containers and methods of designing food and processing industry devices were used as research methods. The scientific novelty of the work lies in the constructive development of a container lid with a mechanically folding device. The result of the research is the creation of a lid mechanism that opens by a rotating movement, which simplifies the closing/opening operations of the container lid, reduces time and labor costs, does not require the use of special additional lifting and turning devices, and increases productivity.

The article examines general approaches aimed at increasing the efficiency of the heating process of jacketed cooking boilers. The importance of removing air from the jacket chamber of cooking boilers is substantiated. It was found that the presence of air in the jacket leads to an extension of the heating time of the boilers, an increase in heat losses and a deterioration of the microclimate in the area where the equipment is operated. The results of the study are shown in graphs reflecting the dependence of the heating time and the amount of air in the jacket on the duration of the blowing process. The design features of mechanical and electromechanical devices that provide automatic hermeticity of the jacket chamber as one of the methods of removing air from the boiler jacket are described. The operational characteristics, operating principle and electrical circuits of boilers equipped with these devices are analyzed in detail. In addition, a new type of jacket design is proposed, equipped with an elastic membrane that separates heating steam from air.

The presented technical solution allows to store the heat carrier inside the steam generator and eliminates heat losses resulting from the release of steam into the environment. At the same time, this solution prevents corrosion of the jacket body, minimizes the formation of scale on the surface of electric heaters, increases the service life of the equipment and eliminates the need for additional safety valves. Studies have shown that the use of automatic sealing devices reduces the heating time of boilers by 3–5%, reduces heat losses by up to 15% and makes working conditions more comfortable for operating personnel.