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公开(公告)号：US20190234392A1
公开(公告)日：2019-08-01
申请号：US16376430
申请日：2019-04-05
CPC分类号： F04B39/121 , F04B7/0076 , F04B27/053 , F04B35/01 , F04B35/04 , F04B39/123 , F04B39/125 , F04B49/06 , F04B49/24
摘要： In order to improve a semi-hermetic refrigerant compressor, comprising a reciprocating piston compressor, an electric motor, an overall housing which has a motor housing portion for the electric motor and a compressor housing portion for the reciprocating piston compressor, a suction-side refrigerant path which leads from a suction connection on the overall housing to an inlet chamber of the reciprocating piston compressor, and a pressure-side refrigerant path which leads from an outlet chamber of the reciprocating piston compressor to a pressure connection on the overall housing, such that the refrigerant compressor functions more efficiently, it is proposed that the electric motor is configured as a synchronous motor, in the rotor of which there are arranged permanent magnets for the synchronous operation of the electric motor and a squirrel cage for starting up the electric motor in asynchronous operation.
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公开(公告)号：US20230007826A1
公开(公告)日：2023-01-12
申请号：US17858499
申请日：2022-07-06
发明人： Oliver Javerschek , Jens Mannewitz , Tobias Fuhrer
摘要： A refrigerant compressor group for a refrigeration system, comprising at least two piston compressors that operate in parallel between a common low-pressure connector and a common high-pressure connector, wherein, for the purpose of adjusting it to different requirements, it is provided, in a refrigerant compressor group, for a variable overall mass flow throughput in the refrigerant compressor group to be adjustable in that, in the case of at least one of the piston compressors, its mass flow throughput is adjustable by speed selection with the aid of a frequency converter for the electric motor, and in that, in the case of at least one of the piston compressors, its mass flow throughput is adjustable by cylinder selection, and in that an operating condition controller for the refrigerant compressor group is provided which, on the basis of a performance request signal of the refrigeration system that is transmitted to the operating condition controller, controls the overall mass flow throughput by open or closed-loop control by predetermining the cylinder selection and the speed selection.
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公开(公告)号：US20200166250A1
公开(公告)日：2020-05-28
申请号：US16691931
申请日：2019-11-22
发明人： Jens Mannewitz , Robin Langebach
IPC分类号： F25B31/00
摘要： In order to improve a refrigerant compressor, in particular for a refrigeration system, including a common housing, a compressor unit arranged in the common housing, a mechanical compressor drive unit for the compressor unit, arranged in a drive chamber of the common housing, a lubricant bath forming in the drive chamber, an intake duct that extends in the common housing in a manner separated from the drive chamber and through which the compressor unit draws in by suction refrigerant that is to be compressed, such that a refrigerant compressor is provided in which the spurting of lubricant is reduced to the greatest possible extent, it is proposed that that the intake duct and the drive chamber should be connected by way of a gas equaliser duct, which allows a permanent equalisation of gas between them, and which has on one side an opening on the drive chamber side and on the other an opening on the intake side, and of which the duct length between the openings corresponds to at least twice an equivalent duct diameter, in particular a smallest equivalent duct diameter, of the gas equaliser duct.
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公开(公告)号：US11988429B2
公开(公告)日：2024-05-21
申请号：US17372072
申请日：2021-07-09
发明人： Jens Mannewitz , Tobias Fuhrer , Patrick Schneider
IPC分类号： F25B49/02
CPC分类号： F25B49/022 , F25B49/025 , F25B2600/0253 , F25B2700/171 , F25B2700/21155 , F25B2700/21156
摘要： A refrigerant compressor for refrigeration plants having a compressor unit driven by a drive unit. At least one of the compressor and drive units has a control unit which is controllable by delivery rate control system to control the refrigerant compressor at different delivery rates. An external delivery rate setpoint value is communicated to the delivery rate control system to prevent critical operating states. The delivery rate control system is configured to acquire, via a sensor, a compressor unit reference temperature. The delivery rate control system is configured to ascertain an operating state value group to acquire an operating state of the refrigerant compressor, and specify a delivery rate for operation of the refrigerant compressor outside of the critical operating states, if the value of the ascertained operating state value group based upon the compressor reference temperature permits a critical operating state of the refrigerant compressor.
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公开(公告)号：US11543160B2
公开(公告)日：2023-01-03
申请号：US16691931
申请日：2019-11-22
发明人： Jens Mannewitz , Robin Langebach
摘要： A refrigerant compressor for a refrigeration system comprises a common housing, a compressor unit arranged in the common housing, a mechanical compressor drive unit for the compressor unit, arranged in a drive chamber, a lubricant bath forming in the drive chamber, an intake duct that extends in a manner separated from the drive chamber and through which the compressor unit draws in by suction refrigerant that is to be compressed. The intake duct and the drive chamber are connected by a gas equaliser duct, which allows a permanent equalisation of gas, and which has on one side an opening on the drive chamber side and on the other an opening on the intake side, and of which the duct length between the openings corresponds to at least twice an equivalent duct diameter, in particular a smallest equivalent duct diameter, of the gas equaliser duct.
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