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. 07, 2026
Filed:
Feb. 18, 2022
Danfoss A/s, Nordborg, DK;
DANFOSS A/S, Nordborg, DK;
Abstract
A vapour compression system () including a compressor unit () having at least one main compressor () and at least one receiver compressor (), a heat rejecting heat exchanger (), a receiver (), an expansion device () and an evaporator () being arranged in a refrigerant path. The vapour compression system () further includes a bypass valve () fluidly interconnecting the gaseous outlet () of the receiver () and the main compressor(s) (). A pressure difference across the bypass valve () is measured or derived, and a mass flow rate of refrigerant through the bypass valve () is derived, based at least on the pressure difference across the bypass valve (), and using a fluid model. A minimum mass flow rate of refrigerant required to operate the receiver compressor () is derived, based on a minimum displacement volume of the receiver compressor () and using a fluid model taking prevailing operating conditions into account. In the case that the derived mass flow rate of refrigerant through the bypass valve () exceeds the derived minimum mass flow rate of refrigerant required to operate the receiver compressor (), the receiver compressor () is started and the bypass valve () is closed.