US 12,313,295 B2
Direct-heating type heater
Desheng Liao, Shanghai (CN)
Assigned to Shanghai Kohler Electronics, Ltd., Shanghai (CN)
Filed by Shanghai Kohler Electronics, Ltd., Shanghai (CN)
Filed on May 27, 2022, as Appl. No. 17/826,857.
Application 17/826,857 is a continuation of application No. 16/230,065, filed on Dec. 21, 2018, granted, now 11,365,901.
Claims priority of application No. 201711421931.9 (CN), filed on Dec. 25, 2017.
Prior Publication US 2022/0290893 A1, Sep. 15, 2022
Int. Cl. F24H 1/10 (2022.01); F24H 9/00 (2022.01)
CPC F24H 1/103 (2013.01) [F24H 9/0021 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A heater for a fluid, the heater comprising:
a heater shell; and
a heating device arranged inside of the heater shell and comprising a water inlet and an internal passage,
wherein a front segment of the heating device is installed with a metal elastic device, and a portion of an inner wall of the heater shell corresponding to the heating device with no metal elastic device installed is partially or wholly provided with a helical groove structure, the front segment with the metal elastic device providing a higher rate of heat transfer from the heating device to the fluid than the portion with the helical groove structure, the front segment with the metal elastic device configured to heat the fluid before the fluid is mixed in the portion with the helical groove structure,
wherein the fluid flows in a first direction at the heating device and in a second direction at the heater shell,
wherein the fluid flows in the first direction through the water inlet and the internal passage, and
wherein the portion of the inner wall of the heater shell with the helical groove structure and the heating device cooperate to form a helical flow path around the heating device.