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公开(公告)号：US11428239B2
公开(公告)日：2022-08-30
申请号：US16485692
申请日：2018-02-22
发明人： Jun Koga , Ryosuke Suemitsu
摘要： A compressor suction pipe includes a bent portion at least including a first pipe segment on the most upstream side with respect to flow of a fluid to be compressed, a second pipe segment connected to a suction side of a compressor and extending in a direction different from the extension direction of the first pipe segment, and a third pipe segment disposed between the first pipe segment and the second pipe segment and extending in a direction different from the extension directions of the first and second pipe segments, and at least one partition extending at least from an intermediate portion of the first pipe segment at least to an intermediate portion of the second pipe segment in the bent portion and dividing an interior of the bent portion. The partition extends in a direction intersecting a virtual plane including an incircle that touches an axis of the first pipe segment on an upstream side of a downstream end of the first pipe segment and touches an axis of the second pipe segment.
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公开(公告)号：US20220186985A1
公开(公告)日：2022-06-16
申请号：US17255908
申请日：2020-06-29
申请人： Carrier Corporation
发明人： Vishnu M. Sishtla , Lei Yu
摘要： A coolant system includes a multistage compressor having a plurality of surge detection sensors. A condenser is connected to an outlet of the multistage compressor. An economizer is connected to an outlet of the condenser and has a gaseous coolant outlet and a liquid coolant outlet. The liquid coolant outlet is connected to a cooler and the gaseous coolant outlet is connected to a second or later stage of the multistage compressor via a controllable valve. A controller is communicatively coupled to the surge detection sensors and the controllable valve. The controller includes a non-transitory medium storing instructions for causing the controller to detect an occurrence of a surge and restricting a flow through the controllable valve until the surge has ceased.
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公开(公告)号：US11306950B2
公开(公告)日：2022-04-19
申请号：US16624865
申请日：2018-07-27
申请人： Carrier Corporation
摘要： A lubrication additive recovery system is provided for use with a vapor compression system. The vapor compression system includes a compressor having a bearing, a condenser and an evaporator. The lubrication additive recovery system includes a lubrication ring formed to define first and second through-holes, a first system by which a portion of a required supply of lubrication is drawn from the condenser and provided to the bearing through the first through-holes and a second system by which a remainder of the required supply of lubrication is recovered from the evaporator and provided along with compressor discharge gas to the bearing through the second through-holes.
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公开(公告)号：US11022355B2
公开(公告)日：2021-06-01
申请号：US15934687
申请日：2018-03-23
发明人： Florin V. Iancu , Justin P. Kauffman , Jeb W. Schreiber , Chenggang Wu , Steven Wang , John Trevino, Jr.
IPC分类号： F25B41/00 , F15D1/04 , F25B41/06 , F25B41/40 , F04D17/10 , F04D29/42 , F25B1/053 , F25B41/30
摘要： A compressor includes an inlet and the inlet includes a flange and an impeller eye. The flange is connected to a suction line that transfers a refrigerant into the compressor via the impeller eye. The refrigerant flows into the compressor with an amount of swirl and a pressure loss. The suction line includes a geometry that includes a constantly decreasing cross-sectional area in a direction towards the compressor. The geometry of the suction line is configured to reduce the amount of swirl and the pressure loss.
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公开(公告)号：US20210108843A1
公开(公告)日：2021-04-15
申请号：US16498953
申请日：2018-03-08
摘要： A refrigeration machine control device according to an embodiment of the present invention serves to control a turbo refrigeration machine and is equipped with a pressure reduction rate identification unit for identifying a pressure reduction rate at which foaming does not occur in an oil tank, and a pressure adjustment unit for adjusting the pressure of an evaporator on the basis of the identified pressure reduction rate. The pressure reduction rate identification unit is equipped with: a refrigerant precipitation gas volume calculation unit for calculating the volume of refrigerant gas precipitated from lubricating oil when the pressure is reduced at a prescribed pressure reduction rate; and a determination unit for determining whether or not foaming is permissible on the basis of a comparison between the calculated volume and the volume on the surface of the oil in the oil tank.
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公开(公告)号：US10962263B2
公开(公告)日：2021-03-30
申请号：US16320278
申请日：2017-08-09
申请人： Carrier Corporation
IPC分类号： F25B31/00 , F04D25/06 , F04D29/063 , F04D29/42 , F25B1/053
摘要： A vapor compression system (20, 400, 420, 440, 460, 480) has: a compressor (22) having a suction port (40) and a discharge port (42); a heat rejection heat exchanger (58) coupled to the discharge port to receive compressed refrigerant; a heat absorption heat exchanger (88); a first lubricant flowpath (120, 126; 120) from the heat rejection heat exchanger to the compressor; a second lubricant flowpath (121, 126; 121) from the heat absorption heat exchanger to the compressor; at least one lubricant pump (190; 190, 191); at least one liquid level sensor (180, 181; 180, 181, 330); and a controller (900) configured to control lubricant flow along the first lubricant flowpath and the second lubricant flowpath based on output of the at least one liquid level sensor.
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公开(公告)号：US20210050765A1
公开(公告)日：2021-02-18
申请号：US17089396
申请日：2020-11-04
发明人： Takaaki ONO , Yusuke IRINO , Yuji NAKAZAWA
摘要： An electric motor system includes a drive shaft that rotationally drives a load, a bearingless motor, a power source unit, and a control unit. The bearingless motor includes a rotor and a stator having armature and support windings. The bearingless motor rotationally drives the drive shaft and supports a radial load of the drive shaft in a contactless manner. The power source unit applies a voltage to the armature and support windings. The control unit controls the power source unit so that a radial support force that is a sum of a radial support force caused by a support current and a radial support force caused by both the support current and an armature current is output, and so that one of an armature voltage across the armature winding and the support current is increased and the other of the armature voltage and the support current is decreased.
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公开(公告)号：US10808711B2
公开(公告)日：2020-10-20
申请号：US15684557
申请日：2017-08-23
申请人： LG ELECTRONICS INC.
发明人： Namsoo Lee , Solji Ryu , Kiwook Lee , Seongmin Jang
IPC分类号： F25B49/02 , F04D27/00 , F04D29/053 , F04D29/058 , F04D29/28 , F25B31/02 , G01B7/14 , F25B1/053 , F25B39/00
摘要： The present invention provides a compressor that includes: one or more impellers that axially suck and centrifugally compress a refrigerant; a rotary shaft that is connected with the impeller and a motor for rotating the impeller; a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate; a gap sensor that senses the distance from the rotary shaft; and a controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor. The controller can sense movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and can determine whether there is abnormal wire connection on the basis of the information.
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公开(公告)号：US10767890B2
公开(公告)日：2020-09-08
申请号：US16609085
申请日：2018-05-08
发明人： Yuji Nakazawa , Atsushi Sakawaki
摘要： A drive shaft rotates a load. A drive support rotates the drive shaft and supports a radial load of the drive shaft in a non-contact manner, by an electromagnetic force generated by the flow of a current within a predetermined current range through the drive support. A control section controls an operation of the load based on a magnetic flux margin degree expressed by the difference between a total magnetic flux amount generated at the drive support and a predetermined limit of the total magnetic flux amount for the drive support. The total magnetic flux amount includes driving magnetic flux and the supporting magnetic flux in a predetermined operation region of the load. The driving magnetic flux is generated at the drive support for rotating the drive shaft. The supporting magnetic flux is generated at the drive support for supporting a radial load of the drive shaft.
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公开(公告)号：US10648702B2
公开(公告)日：2020-05-12
申请号：US15750333
申请日：2016-08-11
申请人： Carrier Corporation
发明人： Parmesh Verma , Frederick J. Cogswell , William T. Cousins , Vishnu M. Sishtla , Ulf J. Jonsson , Larry D. Burns
摘要： A system (20; 300) comprises: a vapor compression loop (38; 338); a low-pressure or medium-pressure refrigerant in the loop; a centrifugal compressor (42) along the vapor compression loop and comprising: a housing (120); an inlet (44); an outlet (46); an impeller (140); an electric motor (122) coupled to the impeller to drive rotation of the impeller; and one or more refrigerant-lubricated bearings (130, 132).
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