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:
Oct. 17, 2017
Filed:
Jul. 11, 2013
Danfoss A/s, Nordborg, DK;
Roozbeh Izadi-Zamanabadi, Soenderborg, DK;
Hans Joergen Jensen, Nordborg, DK;
Lars Jensen, Nordborg, DK;
Danfoss A/S, Nordborg, DK;
Abstract
A method for controlling a vapor compression system during start-up is disclosed. The rate of change, ΔT, of the temperature of refrigerant entering the evaporator, and the rate of change, ΔT, of the temperature of refrigerant leaving the evaporator are compared. Based on the comparing step, a refrigerant filling state of the evaporator is determined. The opening degree of the expansion device is then controlled according to a first control strategy in the case that it is determined that the evaporator is full or almost full, and according to a second control strategy in the case that it is determined that the evaporator is not full. Thereby it is ensured that a maximum filling degree of the evaporator is quickly reached, without risking that liquid refrigerant passes through the evaporator.