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:
Sep. 28, 1999
Filed:
Oct. 24, 1997
Katuhiko Saito, Tokyo, JP;
Keitaro Hori, Tokyo, JP;
Haruhiko Ishida, Tokyo, JP;
Hidekazu Totsuka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Without consuming excessive energy, the invented control unit of refrigerating machine can pour out an accurate amount of refrigerant resting inside the lubricant in short time in order to prevent its foaming. A refrigerating machine provided with inverter-driven compressor comprises current detection circuit that detects current being supplied to drive the compressor and a control circuit that controls the compressor based on a detection result from the current detection circuit. The invented control unit for refrigerating machine is characterized in that the control circuit which applies fixed frequency and fixed voltage to the compressor on start-up. An operation of the compressor is valuated using detection result from the current detection circuit, and based on the result from the current detection circuit, operating frequency of the compressor is controlled.