FIRE-TUBE HOT-WATER BOILER Russian patent published in 2015 - IPC F24H1/12 

FIELD: heating.

SUBSTANCE: fire-tube hot-water boiler contains horizontal cylindrical casing with front door, the burner is installed in the door. Inside the casing the water volume with heating medium input and output branches, combustion chamber in form of fire-tube blinded from the end opposite to the burner, and flame tube connected with the combustion chamber by means of the rotating chamber made by cavity in the door. The door is made with internal cavity, separated by vertical partition to two volumes, connected by means of the hole in bottom part of the partition. The first volume in top part is connected with the water intake tube, the second end of the tube is tied in the heating medium input branch. The second volume is connected with water drainage tube, its second end is tied in the heating medium output branch. Ends of the water intake and water drainage tubes located inside the appropriate branches, by their output hole look towards the free end of the branch.

EFFECT: increased intensity of the heating medium circulation inside the water cooled door, and increased efficiency of its cooling.

8 cl, 8 dwg