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. 22, 2015
Filed:
Sep. 04, 2009
Lars Finn Sloth Larsen, Sydals, DK;
Claus Thybo, Soenderborg, DK;
Lars Finn Sloth Larsen, Sydals, DK;
Claus Thybo, Soenderborg, DK;
Danfoss A/S, Nordborg, DK;
Abstract
A refrigeration system includes an expansion valve and a compressor, the expansion valve, the evaporator and the compressor being arranged in a refrigerant flow path having refrigerant flowing therein. A method for controlling a flow of refrigerant to an evaporator includes steps of increasing an opening degree of the expansion valve, thereby increasing a flow of refrigerant to the evaporator sufficiently to substantially eliminate a dry zone of the evaporator, decreasing the opening degree of the expansion valve, and repeating the steps of increasing and decreasing. This causes the superheat value of refrigerant leaving the evaporator to 'toggle' between a zero level and a low, but positive, level. Thereby the refrigeration capacity is utilized more efficiently. Additionally, sufficiently low amount of liquid refrigerant is allowed to pass through the evaporator to prevent damage to the compressor.