Title:
CONTROL DEVICE FOR REFRIGERATOR AND FREEZER
Document Type and Number:
Japanese Patent JP3231366
Kind Code:
B2
Abstract:
PURPOSE: To provide a control device for a refrigerator-freezer for storing foods in which a pre-cooling is performed just before a defrosting operation in response to an amount of thermal load of foods within the refrigerator, an increasing in temperature of food caused by a lack of pre-cooling operation and an increased amount of electricity caused by an over pre-cooling operation is eliminated.
CONSTITUTION: A refrigerator temperature is detected by a refrigerator temperature sensing means 21. When a compressor operating time integration timer 22 shows a set time, the first cooling temperature sensing means 31 detects a decreasing temperature in which the refrigerator temperature becomes a reference value of the second reference circuit 25 and cooled within an operating time of a cooling time setting timer 32. A fuzzy logical calculation is carried out in response to a control rule taken out of the first memory 34 under an operation of a fuzzy deduction processor 33 in reference to a surrounding air temperature detected by the surrounding air temperature sensing means 30 as well as to this reducing time, thereby a pre-cooling time is determined and a pre-cooling time is set by the first pre-cooling time setting means 35.
Inventors:
Katsumi Endo
Soman Maeda
Shigeru Mori
Hideo Hayashi
Soman Maeda
Shigeru Mori
Hideo Hayashi
Application Number:
JP25337991A
Publication Date:
November 19, 2001
Filing Date:
October 01, 1991
Export Citation:
Assignee:
Matsushita Cold Machinery Co., Ltd.
International Classes:
F25D11/02; F25D21/06; (IPC1-7): F25D11/02; F25D21/06
Domestic Patent References:
| JP2126083A | ||||
| JP6479535A | ||||
| JP61116265A | ||||
| JP239203A | ||||
| JP6262172A |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)