Title:
FROSTING DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/1997/024568
Kind Code:
A1
Abstract:
A frosting detection device using a frosting detection apparatus using in turn a heat sensing detection element and a heat sensing compensation element for detecting a frosting volume through a difference in temperature between the two elements, comprising a frosting detector (1) comprising in turn a heat sensing detection element (1a) and a heat sensing compensation element (1b), an amplifying circuit (2) for amplifying an output signal from the frosting detector (1), a comparative circuit (3) for comparing an output voltage from the amplifying circuit (2) with a set level, an operation detecting circuit (5) for detecting operating conditions of a compressor and a cooling fan (4), and a judgement circuit (6) for detecting a frosting volume through output voltages from the operation detecting circuit (5) and the comparative circuit (3), wherein the output from the comparative circuit (3) is received so as to detect a frosting volume only when the compressor and the cooling fan (4) are in operation.
Inventors:
NOJIRI TOSHIYUKI (JP)
Application Number:
PCT/JP1996/003486
Publication Date:
July 10, 1997
Filing Date:
November 28, 1996
Export Citation:
Assignee:
ISHIZUKA ELECTRONICS CORP (JP)
NOJIRI TOSHIYUKI (JP)
NOJIRI TOSHIYUKI (JP)
International Classes:
F25D21/02; (IPC1-7): F25D21/02
Foreign References:
| JPH02115678A | 1990-04-27 | |||
| JPS55143482U | 1980-10-14 | |||
| JPS51119047U | 1976-09-27 | |||
| JPS60181557A | 1985-09-17 | |||
| JPH01225883A | 1989-09-08 | |||
| JPH0545040A | 1993-02-23 | |||
| JPS5913876A | 1984-01-24 | |||
| JPS54157360A | 1979-12-12 | |||
| JPS54152246A | 1979-11-30 |
Other References:
See also references of EP 0871002A4
None
None
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