Title:
【発明の名称】浴槽水加熱用電気ヒータ
Document Type and Number:
Japanese Patent JP2691808
Kind Code:
B2
Abstract:
PURPOSE:To provide a safe and low-cost heater device for bath tub water which can be easily operated even if a heater having a high electrical capacity is used. CONSTITUTION:An electrical heating wire 11 is insulated by a plurality of insulating layers in such a way that the wire is may be insulated by two layers of electrical insulating powder layers 12, 14 through metallic pipes 13, 15 and the like and further an insulating resistance measuring terminal of the insulating material powder layer 14 is installed under its electrical conduction with the metallic pipes 13, 15. With such an arrangement as above, safety characteristic can be improved by double insulation of the electrical heating wire and the safety can be checked by measuring an insulating resistance of the insulating material powder layer in every specified time, so that it is possible to prevent a danger of electrical leakage, thereby the heater can be connected directly to a commercial power supply without installing any safety insulating transformer and the like, resulting in that utilization of the heater having a large capacity may easily be carried out.
Inventors:
Kenichi Miyazaki
Application Number:
JP24249991A
Publication Date:
December 17, 1997
Filing Date:
August 28, 1991
Export Citation:
Assignee:
Janome Sewing Machine Co., Ltd.
International Classes:
H05B3/00; F24H1/00; H05B3/48; (IPC1-7): F24H1/00; F24H1/00
Domestic Patent References:
| JP327547U | ||||
| JP6161789U |