Patent attributes
The present application discloses a direct-heating type heater that includes a direct-heating type heater shell, a heating device arranged inside the direct-heating type heater shell, and a direct-heating type heater component, wherein at least one segment of the heating device is installed with a metal elastic device, and the inner wall of the direct-heating type heater shell corresponding to the heating device with no metal elastic device installed is partially or wholly provided with a helical groove structure. Such a heater solves the problem of the prior art that the heat transfer efficiency is low due to the low heat dissipation capability of ceramics, and also solves the problem that water temperature is not even as water passes through the heater quickly and the water cannot be mixed fully and homogeneously.
