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:
Jan. 20, 1998
Filed:
Oct. 11, 1996
Sanyo Electric Company, Ltd., Osaka, JP;
Abstract
The object of the present invention is to provide a defrosting device, for a low temperature display case, that can effectively prevent incomplete defrosting, and that can reduce the temperature increase in a storage chamber during defrosting to the minimum. According to the present invention, a defrosting device comprises: defrosting heaters provided in a duct; a first defrost recovery temperature sensor for detecting an air temperature in the duct; a second defrost recovery temperature sensor for detecting a temperature at the evaporator; and a controller for, during a defrosting operation for the evaporator, rendering the defrosting heaters conductive, supplying a high temperature refrigerant to the evaporator, and for rendering the defrosting heaters nonconductive, based on an output of the first defrost recovery temperature sensor, and halting a flow of the high temperature refrigerant to the evaporator, based on an output of the second defrost recovery temperature sensor.