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:
Aug. 23, 2016
Filed:
Dec. 03, 2013
Fläkt Woods Ab, Jönköping, SE;
Johan Andersson, Huskvarna, SE;
FLÄKT WOODS AB, Jönköping, SE;
Abstract
Method and device for defrosting of an evaporator () in a heat pump () connected to an air handling unit (), which comprises a controllable heat recovery device (). The heat pump () comprises a refrigerant system () with a refrigerant (), a compressor (), a condenser (), a first expansion valve () and an evaporator (). A four-way valve () is arranged after the compressor () and before the condenser (), for changing a flow direction of the refrigerant () to the evaporator () instead of the condenser (). The heat recovery device () recovers energy from first air stream () and transfer energy to second air stream (). When frost formation occurs, the refrigerant temperature is increased and the recovery device () is regulated down so that heating of the evaporator () is accomplished, both from inside and outside to defrost the evaporator ().