Title:
温水器の加熱素子上の湯垢の防止又は低減
Document Type and Number:
Japanese Patent JP5868973
Kind Code:
B2
Abstract:
The invention provides a method of using a water heater arranged for heating an aqueous liquid wherein the water heater comprises a heating element to heat aqueous liquid in the water heater. The method comprising (a) heating aqueous liquid in the water heater with the heating element, wherein the heating element is in contact with the aqueous liquid; and (b) applying a first AC voltage between the heating element and a counter electrode and applying a second AC voltage between the heating element and the counter electrode, wherein the second AC voltage has a second AC frequency selected from the range of 0.02 Hz-5 Hz and wherein the ratio between the first AC frequency and the second AC frequency is 2 or more.
Inventors:
Weierstra Itzen
Application Number:
JP2013520256A
Publication Date:
February 24, 2016
Filing Date:
July 13, 2011
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
F24H1/20; F22B1/28
Domestic Patent References:
| JP2005523807A | ||||
| JP2002336861A | ||||
| JP2000263050A | ||||
| JP5228475A |
Attorney, Agent or Firm:
Patent Services Corporation m&s Partners
Akihiko Miyazaki
Akihiko Miyazaki