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:
Jun. 06, 1989
Filed:
Dec. 27, 1987
Reinosuke Oyanagi, Yokohama, JP;
Hazime Tanaka, Yokohama, JP;
Fuji Koki Mfg. Co. Ltd., Tokyo, JP;
Abstract
An electric signal T1 representing the evaporating temperature of refrigerant is processed by a phase lead network and thus converted to T1' with a single time constant so as to compensate for the time lag due to the time constant of a temperature sensor for sensing the evaporating temperature. An electrical signal T2 representing superheated vapor temperature at the outlet of an evaporator is processed by a phase lag network and thus converted to T2', so as to have a larger time constant than that of the unprocessed signal T2 and a signal corresponding to .DELTA.T'=T1'-T2' is used to control the degree of valve opening of an electric expansion valve.