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11. 发明公开

EP4105489A1 CONTROL METHOD FOR CENTRIFUGAL COMPRESSOR AND AIR CONDITIONING SYSTEM 审中-公开
公开(公告)号：EP4105489A1
公开(公告)日：2022-12-21
申请号：EP22178746.8
申请日：2022-06-13
申请人： Carrier Corporation
发明人： DENG, Kai , SISHTLA, Vishnu , CAO, Jun , SHAO, Yuchang
IPC分类号： F04D17/10 , F04D27/02
摘要： A control method for a centrifugal compressor and an air conditioning system are provided. The control method for the centrifugal compressor comprises: S100, when an inlet opening of the centrifugal compressor is below a first preset value, shutting down a drive motor of the centrifugal compressor; or S200, when the inlet opening of the centrifugal compressor is not below the first preset value, performing the following operations in a preset order: decreasing the inlet opening of the centrifugal compressor, and increasing a rotation speed of the centrifugal compressor. According to solutions of the present invention, the control method of the centrifugal compressor provides higher reliability, longer lifetime, and lower noise for the air conditioning system to which it is applied

12. 发明公开

EP3973193A1 REFRIGERATION SYSTEM MIXED-FLOW COMPRESSOR 审中-公开
公开(公告)号：EP3973193A1
公开(公告)日：2022-03-30
申请号：EP20730845.3
申请日：2020-05-15
申请人： Carrier Corporation
发明人： SISHTLA, Vishnu , COUSINS, William T. , JOLY, Michael M.
IPC分类号： F04D17/06 , F04D17/12 , F04D25/06 , F04D29/28 , F04D29/58 , F25B1/053

13. 发明公开

EP2893617A2 MOTOR ROTOR AND AIR GAP COOLING 审中-公开
标题翻译：摩托车UNDLUFTSPALTKÜHLUNG
公开(公告)号：EP2893617A2
公开(公告)日：2015-07-15
申请号：EP13739889.7
申请日：2013-07-02
申请人： Carrier Corporation
发明人： SISHTLA, Vishnu
IPC分类号： H02K1/32 , H02K9/19 , H02K9/193
CPC分类号： F04D29/5806 , F04D29/26 , H02K1/32 , H02K9/19 , H02K9/193
摘要： A motor cooling system for a simply supported compressor includes a rotor shaft 24 having a first end 26 and a second end 28. The rotor shaft 24 includes an axial bore 60 and a plurality of shaft radial holes 64 extending from a first end of the axial bore 60, wherein a cooling medium is supplied to the axial bore 60. The cooling system further includes a rotor 22 coupled to the rotor shaft 24 and having a plurality of rotor axial holes 25 and a plurality of rotor radial holes 27. The plurality of rotor radial holes 27 extends from the plurality of rotor axial holes 25. A refrigerant dam 70 is arranged adjacent a first end of the rotor 22 and includes a plurality of dam axial holes 74 fluidly coupled to an interior cavity 72. The dam axial holes 74 align with the rotor axial holes 25 and the interior cavity 72 aligns with the shaft radial holes 64 to form a flow path between the rotor shaft 24 and the rotor 22.
摘要翻译：用于简单支撑的压缩机的电动机冷却系统包括具有第一端26和第二端28的转子轴24.转子轴24包括轴向孔60和从轴向的第一端延伸的多个轴径向孔64 孔60，其中向轴向孔60供应冷却介质。冷却系统还包括联接到转子轴24并具有多个转子轴向孔25和多个转子径向孔27的转子22。转子径向孔27从多个转子轴向孔25延伸。制冷剂坝70邻近转子22的第一端设置并且包括流体耦合到内部空腔72的多个阻挡轴向孔74。与转子轴向孔25对准，并且内部空腔72与轴径向孔64对准以在转子轴24和转子22之间形成流动路径。

14. 发明公开

EP4109014A1 SURGE PREVENTION IN A CHILLER WITH CENTRIFUGAL COMPRESSOR 审中-公开
公开(公告)号：EP4109014A1
公开(公告)日：2022-12-28
申请号：EP22180730.8
申请日：2022-06-23
申请人： Carrier Corporation
发明人： SISHTLA, Vishnu
IPC分类号： F25B49/02 , F25B1/053 , F04D27/02
摘要： A method of operating a chiller system (20) includes receiving an input from at least one sensor (S) associated with a compressor (22) of the chiller system, determining that the compressor is experiencing a surge or rotating stall event, adjusting at least one operating parameter associated with a heat rejection heat exchanger (28) of the chiller system in response to determining that the compressor is experiencing the surge or rotating stall event, and reducing a condenser saturation temperature by adjusting the at least one operating parameter.

15. 发明公开

EP4105574A1 REFRIGERATION SYSTEM AND OIL RECOVERY METHOD FOR THE SAME 审中-公开
公开(公告)号：EP4105574A1
公开(公告)日：2022-12-21
申请号：EP22179601.4
申请日：2022-06-17
申请人： Carrier Corporation
发明人： GUO, Zhen , DENG, Kai , SISHTLA, Vishnu , WU, Yingqin , YU, Lei
IPC分类号： F25B31/00 , F25B11/02 , F25B41/20
摘要： The present invention provides a refrigeration system, which includes: a compressor (1), a condenser (2), a throttling device (3), and an evaporator (4), all of which are connected in sequence to form a cooling circuit, in which the refrigeration system further includes an oil recovery system which includes: an operation chamber (5), which includes a first port (51) communicating with an oil-containing position in the refrigeration system through a first pipeline (61), and a second port (52) communicating with a bearing chamber or a bearing lubrication pipeline (11) of the compressor (1) through a second pipeline (62); and a main piston (531) in the operation chamber (5), the main piston (531) reciprocating in the operation chamber (5) to perform an extraction stroke and a discharge stroke; in the extraction stroke, an oil-containing refrigerant in the oil-containing position in the refrigeration system is extracted to the operation chamber (5); and in the discharge stroke, the oil-containing refrigerant in the operation chamber (5) is delivered to the bearing chamber or the bearing lubrication pipeline (11) of the compressor (1). The device and method according to the embodiments of the present invention can provide refrigerant with sufficient oil content to the bearing chamber or the bearing lubrication pipeline (11) of the compressor (1).

16. 发明公开

EP3859162A1 MAGNETIC BEARING COOLING MANAGEMENT 审中-公开
公开(公告)号：EP3859162A1
公开(公告)日：2021-08-04
申请号：EP21154444.0
申请日：2021-01-29
申请人： Carrier Corporation
发明人： NIEFORTH, Scott A. , SISHTLA, Vishnu
IPC分类号： F04D25/06 , F04C18/02 , F04D29/058 , F04D29/58 , F04D29/051
摘要： A shield (110) for controlling the cooling within a hermetically cooled motor (130), and a compressor (100) incorporating the shield (110) are provided. The shield (110) includes an insulator (111), at least one fastener (118), and a venting aperture (113). The insulator (111) restricts the flow of a working fluid between a first side (180) and a second side (190). The at least one fastener (118) secures the insulator (111). The venting aperture (113) controls a pressure differential between the first side (180) and the second side (190). The venting aperture (113) may include at least one hole through the insulator (111). The venting aperture (133) may be provided as a hole through the insulator (111) for the rotating shaft (140) of the compressor (100).

17. 发明授权

EP2893617B1 MOTOR ROTOR AND AIR GAP COOLING 有权
公开(公告)号：EP2893617B1
公开(公告)日：2019-12-25
申请号：EP13739889.7
申请日：2013-07-02
申请人： Carrier Corporation
发明人： SISHTLA, Vishnu
IPC分类号： H02K1/32 , H02K9/19 , H02K9/193 , F04D29/26 , F04D29/58

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