Title:
ELECTRIC HOT WATER APPARATUS WITH OUTPUT TEMPERATURE REGULATION AND ELECTRONIC POWER REGULATING DEVICE
Document Type and Number:
WIPO Patent Application WO1986000689
Kind Code:
A3
Abstract:
PCT No. PCT/EP85/00329 Sec. 371 Date Mar. 14, 1986 Sec. 102(e) Date Mar. 14, 1986 PCT Filed Jul. 6, 1985 PCT Pub. No. WO86/00689 PCT Pub. Date Jan. 30, 1986.An electric continuous-flow water heater generates a basic power with heating resistors in heating passages and a controllable power with three heating resistors in heating passages. The controllable power is controlled by a control system through a triac. At low flow rates two phases and a low controllable basic power is connected to the heating resistors. At high flow rates the heating resistors are star-connected and the controllable heating-resistors are delta-connected. An electric power output stage comprises a mains rectifier bridge, a Schmitt-trigger connected to the output thereof and a frequency divider with two outputs. The signals at the outputs are set by an edge of each third pulse and are reset by the corresponding edge of the following or next but one pulse. A semiconductor relay is optionally by the signals at the outputs through a selector switch or a logic circuit and is rendered conductive for one, two or three half waves.
More Like This:
Inventors:
ECKERFELD ALFRED (DE)
Application Number:
PCT/EP1985/000329
Publication Date:
April 10, 1986
Filing Date:
July 06, 1985
Export Citation:
Assignee:
ECKERFELD ALFRED (DE)
International Classes:
F24H9/20; G05D23/24; F24D10/00; (IPC1-7): F24H9/20; G05D23/24
Foreign References:
| DE2837934A1 | 1980-03-06 | |||
| FR1399948A | 1965-05-21 | |||
| DE1228012B | 1966-11-03 | |||
| DE1949949A1 | 1971-04-22 |
Download PDF: