US 12,188,687 B2
Control device for expansion tank and water heater
Yongsheng Ding, Shanghai (CN); and Jie Zhang, Shanghai (CN)
Assigned to Kohler (China) Investment Co., Ltd., Shanghai (CN)
Filed by Kohler (China) Investment Co., Ltd., Shanghai (CN)
Filed on Oct. 21, 2022, as Appl. No. 18/048,502.
Claims priority of application No. 202122544008.2 (CN), filed on Oct. 21, 2021.
Prior Publication US 2023/0129689 A1, Apr. 27, 2023
Int. Cl. F24D 3/10 (2006.01); F24H 1/18 (2022.01); F24H 15/238 (2022.01); F24H 15/305 (2022.01)
CPC F24H 1/188 (2013.01) [F24H 15/238 (2022.01); F24H 15/305 (2022.01)] 22 Claims
OG exemplary drawing
 
1. An expansion tank control device, comprising:
a water flow sensor arranged in a water inlet waterway of a water heater, wherein the water flow sensor sends out a first electric signal after detecting a water flow in the water inlet waterway, and sends out a second electric signal after detecting that no water flow exists in the water inlet waterway;
a controller, wherein an input end of the controller is connected with an output end of the water flow sensor; and the controller outputs a driving electric signal after receiving the first electric signal output by the water flow sensor, and outputs a reset electric signal after receiving the second electric signal output by the water flow sensor; and
an electric driving part arranged on a shell of an expansion tank, wherein a controlled end of the electric driving part is connected with an output end of the controller, and a driving end of the electric driving part is provided with a push plate; the controlled end of the electric driving part drives the push plate to move in a direction close to the expansion tank after receiving the driving electric signal; and the controlled end of the electric driving part drives the push plate to move in a direction far away from the expansion tank after receiving the reset electric signal.