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1.发明申请公开(公告)号：US20250003661A1
公开(公告)日：2025-01-02
申请号：US18753330
申请日：2024-06-25
Applicant: Danfoss Commercial Compressors
Inventor： Patrice BONNEFOI , Yves ROSSON , Gabriel STREDA , Alexis DELORME , Jean-Jacques LAISSUS
Abstract: A method for managing oil in a running multi-compressor refrigeration system including a controller and a multi-compressor device, includes monitoring an oil level in the oil sump of each compressor through the respective oil level detection device; detecting that a lack of oil situation occurs in a running compressor, if the oil level in said running compressor reaches a predetermined threshold condition; performing an oil managing action if a lack of oil situation is detected for a running compressor, the oil managing action being based on a changing of ON/OFF configurations of the compressors in the multi-compressor device and including performing an oil balancing action, if more than a half of the total number of compressors are running, or performing an oil returning action, if a half or less of the total number of compressors are running.
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公开(公告)号：US20250012490A1
公开(公告)日：2025-01-09
申请号：US18757606
申请日：2024-06-28
Applicant: DANFOSS COMMERCIAL COMPRESSORS
Inventor： Jean-Jacques LAISSUS , Arnaud DAUSSIN , Remi Bou DARGHAM , Alexis DELORME
Abstract: The multi-compressor refrigeration system comprising a controller and a multi-compressor device including at least three compressors which are coupled in parallel, each compressor equipped with an oil sump and an oil level detection device, the compressors divided into two groups each including at least one compressor; suction fittings of the compressors that are fluidly connected by a common suction line and oil sumps that are fluidly connected by a common oil equalization line. The multi-compressor device includes an oil pumping device located in the common oil equalization line and between the two groups, and at least one valve located in the common oil equalization line and configured to control an oil flow between the oil pumping device and at least one compressor of a group associated with the at least one valve.
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公开(公告)号：US20220412359A1
公开(公告)日：2022-12-29
申请号：US17840944
申请日：2022-06-15
Applicant: Danfoss Commercial Compressors
Inventor： Patrice BONNEFOI , Gabriel STREDA , Yves ROSSON , Jean-Jacques LAISSUS , Alexis DELORME
Abstract: The refrigerant compressor includes a compressor casing (2); an oil sump (13) arranged in the compressor casing (2); and an oil level sensor arrangement (14) configured to detect an oil level in the oil sump (13), the oil level sensor arrangement (14) including a tubular element (16) secured to the compressor casing (2) and a floating element (17) surrounding the tubular element (16) and being movably mounted with respect to the tubular element (16). The compressor casing (2) includes a passage opening (24) and dimensions of the tubular element (16), the floating element (17) and the passage opening (24) are defined to allow an insertion and a removal of the tubular element (16) and the floating element (17) into and out of the compressor casing (2) through the passage opening (24).
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