The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 1989
Filed:
Feb. 24, 1988
Koji Yamada, Ibaraki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A cold accumulation type refrigerator having an improved control system for controlling its defrost cycle. The refrigerator includes a main evaporator for producing cold air, a cooling command signal generating device for generating a cooling command signal when a refrigerator compartment is required to be cooled, a clock device for generating a time data, a refrigerating cycle for cooling the main evaporator in accordance with the cooling command signal and the cold-accumulation material in accordance with the time data from the clock device, and a defrost control device for removing frost deposited on the main evaporator. The defrost control device counts cooling operation time of the evaporator in response to the cooling command signal. If the refrigerator is a fan cool type refrigerator whose evaporator is provided with a cold air circulation fan, the defrost control device counts the operation time of the fan, and when a prescribed time count, such as twelve hours, has been completed, the defrost control device generates a defrost starting signal, whereby a proper defrosting operation is carried out even in the cold-accumulation type refrigerator.