Production process of membrane heater with hot water and steam dual-purpose functions

Abstract

The invention discloses a production process of a membrane heater with hot water and steam dual-purpose functions, which comprises the following steps: S1, expanding or stamping a flow guide pipe to enable the outer wall of the flow guide pipe to have a flow guide bulge protruding outwards; s2, first end sockets are welded to openings in the two ends of the flow guide pipe; s3, the welded flow guide pipe is nested in the heating base pipe to be assembled and positioned, the flow guide pipe is placed in a die of a punching machine to punch one end of the heating base pipe from outside to inside after being assembled and positioned, and the die is stretched and extruded towards the other end of the heating base pipe along the axis of the heating base pipe after punching, the flow guide pipe and the heating base pipe are in relative interference fit to form a flow channel; s4, brazing filler metal is blown into the flow channel along one end of the flow guide protrusion, and the contact gap between the flow guide pipe and the base pipe is filled with the brazing filler metal for brazing; the membrane heater has the advantages of tight sealing of the flow channel, high structural stability and strength, no water channeling, no peculiar smell, convenience in processing, high production efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of membrane heaters, in particular to a production process of a membrane heater with dual functions of hot water and steam. Background technique [0002] Membrane heaters are widely used in drinking water heating fields such as water dispensers, purifiers, tea makers and coffee machines. Membrane heaters usually use tubular membrane heating tubes to heat drinking water. The function of dual-use water and steam, the membrane heating tube heats cold water into water vapor, and the heating surface of the membrane heating tube needs to have a closed water flow cavity. The existing membrane heating tube usually has a plurality of pipe fittings nested on the heating surface of its inner wall. It forms a closed water flow cavity with the sealing rubber parts, but the flow channel of the processed membrane heating tube is not tightly sealed, the structure is complex, the processing of the membrane heating tube is in...

AI Technical Summary

Problems solved by technology

[0002] Membrane heaters are widely used in drinking water heating fields such as water dispensers, pure drinking machines, tea machines and coffee machines. Membrane heaters usually use tubular structure membrane heating tubes to heat drinking water. Existing membrane heating tubes can have thermal The function of water and steam is dual-purpose. The heating surface of the membrane heating tube needs to have a closed water flow cavity to heat the cold water into steam by the membrane heating tube. The existing membrane heating tube is usually nested with multiple pipe fittings on the heating surface of its inner wall. It forms a closed water flow cavity with the sealing rubber parts, but the flow channel of the processed film heating tube is not tightly sealed, the structure is complex, the processing of the film heating tube is inconvenient, the production efficiency is low, and the plastic parts in the film heater make the heating The hot water and steam have peculiar smell, the continuous flow of water or steam is not smooth, there is water channeling, the structure of the membrane heating tube is unstable, the structural strength is low, and the service life is short.

Images