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:
Apr. 21, 2025
Filed:
Apr. 21, 2021
Danfoss A/s, Nordborg, DE;
Roozbeh Izadi-Zamanabadi, Nordborg, DK;
Glenn Andreasen, Nordborg, DK;
Peter Reichwald, Nordborg, DK;
DANFOSS A/S, Nordborg, DK;
Abstract
A method for monitoring a refrigerant charge in a vapour compression system () is disclosed, the vapour compression system () including a compressor unit (), a heat rejecting heat exchanger (), a high pressure expansion device (), a receiver (), at least one expansion device (), and at least one evaporator () arranged in a refrigerant path. A change in net mass flow into or out of the receiver () and/or a change in net enthalpy flow into or out of the receiver () is detected, and a pressure inside the receiver () is monitored as a function of time, following the detected change in net mass flow and/or in net enthalpy flow. A time constant being representative for dynamics of the receiver () is derived, based on the monitored pressure as a function of time, and information regarding a refrigerant charge in the vapour compression system () is derived, based on the derived time constant.