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:
Dec. 19, 1989
Filed:
Nov. 01, 1988
Toshihiko Enomoto, Shizuoka, JP;
Yasuo Nakashima, Shizuoka, JP;
Takashi Watanabe, Shizuoka, JP;
Takao Komai, Shizuoka, JP;
Tatsuya Mochizuki, Shizuoka, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A defrosting system for a heat exchanger includes a temperature detector arranged adjacent to the exchanger, a temperature memory for storing temperature data detected by the detector, and a central processing unit, wherein when a second temperature which is detected by the temperature detector after normal operation requested by a user has restarted and after a predetermined minimum defrosting prohibitive time has passed, drops by a predetermined difference in temperature from a first temperature which is detected by the temperature detector after the normal operation has restarted and after a predetermined defrosting prohibitive time has passed, and the second temperature is a predetermined temperature or below; the central processing unit carries out the defrosting operation. As a result, when the amount of frost has rapidly increased during the defrosting prohibitive time, the defrosting operation is carried out even if the defrosting prohibitive time has not passed, thereby deteriorating the capability of the exchanger and preventing the frost from remaining after the defrosting operation has been completed.