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1. 发明授权

US06205808B1 Prevention of oil backflow from a screw compressor in a refrigeration chiller 有权
标题翻译：防止冷冻机中的螺杆式压缩机回油
公开(公告)号：US06205808B1
公开(公告)日：2001-03-27
申请号：US09390103
申请日：1999-09-03
申请人： Dennis M. Beekman
发明人： Dennis M. Beekman
IPC分类号： F25B4302
CPC分类号： F04C28/28 , F04C29/028 , F25B1/047 , F25B31/004 , Y10S418/01
摘要： A screw compressor in a refrigeration chiller includes one or more baffles disposed in the compressor housing so as to intercept and redirect oil which may flow and/or be blown, under certain operating conditions, in an upstream direction against the stream of suction gas that flows into the compressor from the evaporator. The baffles cause oil to be retained in the compressor rather than being blown back to the system evaporator to ensure that sufficient oil is available to the compressor under all operating conditions and eliminates the need for structure/apparatus in the evaporator dedicated to returning such oil to the compressor.
摘要翻译：制冷冷冻机中的螺杆式压缩机包括设置在压缩机壳体中的一个或多个挡板，以拦截并重新定向在特定操作条件下流动和/或吹送的油，所述油在上游方向上抵抗流动的吸入气体流从蒸发器进入压缩机。挡板导致油被保持在压缩机中而不是被吹回到系统蒸发器中，以确保在所有操作条件下足够的油可用于压缩机，并且不需要专用于将这种油返回到蒸发器中的结构/设备压缩机。

2. 发明授权

US08234877B2 Compressor discharge valve providing freeze and charge migration protection 有权
标题翻译：压缩机排放阀提供冻结和电荷迁移保护
公开(公告)号：US08234877B2
公开(公告)日：2012-08-07
申请号：US12459852
申请日：2009-07-08
申请人： Dennis M. Beekman , Jay H. Johnson , Rodney L. Lakowske , Sean A. Smith , John R. Moilanen
发明人： Dennis M. Beekman , Jay H. Johnson , Rodney L. Lakowske , Sean A. Smith , John R. Moilanen
IPC分类号： F25B31/00 , F25B43/02 , F25B41/00 , F16K31/44
CPC分类号： F16K31/1223 , F25B1/047 , F25B41/04 , F25B2600/0261
摘要： A refrigerant system includes a compressor with a discharge valve that temporarily restricts the compressor's outflow at startup so that the discharge pressure can quickly rise to force lubricant back to the compressor. The discharge valve also helps prevent an axial face of a rotor of a screw compressor from rubbing against a bearing housing axial face of the compressor's housing. When the system turns off under certain low ambient air temperature conditions, the valve closes to help prevent the system's evaporator from freezing up. The discharge valve includes a novel arrangement of a piston, a valve stem extending from the piston, and a valve plug pivotally attached to the valve stem. The pivotal connection ensures a positive seal between the valve plug and a valve seat. A somewhat restricted fluid passageway between the valve's discharge chamber and piston chamber helps prevent the valve from chattering as the valve opens.
摘要翻译：制冷剂系统包括具有排出阀的压缩机，其在启动时临时限制压缩机的流出，使得排出压力可以快速上升以迫使润滑剂返回到压缩机。排放阀还有助于防止螺杆压缩机的转子的轴向面摩擦压缩机壳体的轴承座轴向面。当系统在某些低环境空气温度条件下关闭时，阀关闭，以防止系统的蒸发器冻结。排放阀包括活塞的新颖结构，从活塞延伸的阀杆和可枢转地连接到阀杆的阀塞。枢轴连接确保阀塞和阀座之间的正密封。在阀的排出室和活塞室之间有一定程度的流体通道有助于防止阀在阀打开时颤动。

3. 发明授权

US08365544B2 Screw compressor drive control 有权
标题翻译：螺杆式压缩机驱动控制
公开(公告)号：US08365544B2
公开(公告)日：2013-02-05
申请号：US12544582
申请日：2009-08-20
申请人： David M. Foye , Nathan T. West , Dennis M. Beekman , John R. Sauls
发明人： David M. Foye , Nathan T. West , Dennis M. Beekman , John R. Sauls
IPC分类号： F25B1/00 , F04B49/00
CPC分类号： F25B49/022 , F04B35/04 , F04C18/00 , F04C18/16 , F04C28/08 , F04C2240/403 , F04C2240/81 , F04C2270/03 , F25B1/047 , F25B49/025 , F25B2600/02 , F25B2600/0253 , Y02B30/741
摘要： An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented.
摘要翻译：用于控制制冷系统的螺杆式压缩机的操作的方法的实施例可以包括接收关于制冷系统的螺杆式压缩机的操作的状态信号。该方法还可以包括基于接收到的状态信号来确定螺杆式压缩机的工作点，以及基于操作点选择用于螺杆式压缩机的扭矩分布。该方法还可以包括根据所选择的扭矩分布来驱动螺杆式压缩机。还介绍了适用于实施该方法的制冷系统和压缩机系统。

4. 发明申请

US20110041533A1 SCREW COMPRESSOR DRIVE CONTROL 有权
标题翻译：螺杆压缩机驱动控制
公开(公告)号：US20110041533A1
公开(公告)日：2011-02-24
申请号：US12544582
申请日：2009-08-20
申请人： David M. Foye , Nathan T. West , Dennis M. Beekman , John R. Sauls
发明人： David M. Foye , Nathan T. West , Dennis M. Beekman , John R. Sauls
IPC分类号： F25B49/02 , F25B1/00 , F04B49/06 , F04B49/00
CPC分类号： F25B49/022 , F04B35/04 , F04C18/00 , F04C18/16 , F04C28/08 , F04C2240/403 , F04C2240/81 , F04C2270/03 , F25B1/047 , F25B49/025 , F25B2600/02 , F25B2600/0253 , Y02B30/741
摘要： An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented.
摘要翻译：用于控制制冷系统的螺杆式压缩机的操作的方法的实施例可以包括接收关于制冷系统的螺杆式压缩机的操作的状态信号。该方法还可以包括基于接收到的状态信号来确定螺杆式压缩机的工作点，以及基于操作点选择用于螺杆式压缩机的扭矩分布。该方法还可以包括根据所选择的扭矩分布来驱动螺杆式压缩机。还介绍了适用于实施该方法的制冷系统和压缩机系统。

5. 发明申请

US20110005251A1 Compressor discharge valve providing freeze and charge migration protection 有权
标题翻译：压缩机排放阀提供冻结和电荷迁移保护
公开(公告)号：US20110005251A1
公开(公告)日：2011-01-13
申请号：US12459852
申请日：2009-07-08
申请人： Dennis M. Beekman , Jay H. Johnson , Rodney L. Lakowske , Sean A. Smith , John R. Moilanen
发明人： Dennis M. Beekman , Jay H. Johnson , Rodney L. Lakowske , Sean A. Smith , John R. Moilanen
IPC分类号： F25B1/00 , F16K31/44
CPC分类号： F16K31/1223 , F25B1/047 , F25B41/04 , F25B2600/0261
摘要： A refrigerant system includes a compressor with a discharge valve that temporarily restricts the compressor's outflow at startup so that the discharge pressure can quickly rise to force lubricant back to the compressor. The discharge valve also helps prevent an axial face of a rotor of a screw compressor from rubbing against a bearing housing axial face of the compressor's housing. When the system turns off under certain low ambient air temperature conditions, the valve closes to help prevent the system's evaporator from freezing up. The discharge valve includes a novel arrangement of a piston, a valve stem extending from the piston, and a valve plug pivotally attached to the valve stem. The pivotal connection ensures a positive seal between the valve plug and a valve seat. A somewhat restricted fluid passageway between the valve's discharge chamber and piston chamber helps prevent the valve from chattering as the valve opens.
摘要翻译：制冷剂系统包括具有排气阀的压缩机，其在启动时临时限制压缩机的流出，使得排出压力可以快速上升以迫使润滑剂返回到压缩机。排放阀还有助于防止螺杆压缩机的转子的轴向面摩擦压缩机壳体的轴承座轴向面。当系统在某些低环境空气温度条件下关闭时，阀关闭，以防止系统的蒸发器冻结。排放阀包括活塞的新颖结构，从活塞延伸的阀杆和可枢转地连接到阀杆的阀塞。枢轴连接确保阀塞和阀座之间的正密封。在阀的排出室和活塞室之间有一定程度的流体通道有助于防止阀在阀打开时颤动。

6. 发明授权

US5979168A Single-source gas actuation for screw compressor slide valve assembly 失效
标题翻译：螺杆式压缩机滑阀组件的单源气体驱动
公开(公告)号：US5979168A
公开(公告)日：1999-11-09
申请号：US892987
申请日：1997-07-15
申请人： Dennis M. Beekman
发明人： Dennis M. Beekman
IPC分类号： F04B49/02 , F04C18/16 , F04C28/12 , F25B49/02 , F04C29/10
CPC分类号： F04C28/12 , Y10S418/01
摘要： The position of a screw compressor slide valve in a refrigeration system is controlled using compressor discharge gas sourced from a location where the gas is relatively oil-free and has undergone little or no pressure drop subsequent to its discharge from the compressor's working chamber.
摘要翻译：螺杆式压缩机滑阀在制冷系统中的位置使用来自气体相对无油的位置的压缩机排出气体进行控制，并且在从压缩机的工作室排出之后几乎没有或没有压降。

7. 发明授权

US5502984A Non-concentric oil separator 失效
标题翻译：非同心分油器
公开(公告)号：US5502984A
公开(公告)日：1996-04-02
申请号：US264832
申请日：1994-06-23
申请人： Michael C. Boehde , Dennis M. Beekman
发明人： Michael C. Boehde , Dennis M. Beekman
IPC分类号： B01D45/12 , F25B43/02 , B01D21/26
CPC分类号： F25B43/02 , B01D45/12 , F25B2400/02
摘要： An oil separator for a refrigeration system employing a screw compressor includes a generally cylindrical, vertically upstanding housing the bottom of which defines an oil sump and the top of which is penetrated by discharge conduit connecting the oil separator to the refrigeration system condenser. The center line of the discharge conduit is parallel to but offset from the center line of the separator housing so that the discharge conduit is non-concentric with the housing. As a result, an enlarged tangential inlet to the interior of the separator is made possible which is unimpeded by the discharge conduit. The cross sectional flow area through which the mixture discharged from the compressor passes prior to entering the separator can therefore likewise be increased. As a result, pressure drop in the refrigerant gas as a result of the oil separation process is reduced and overall system efficiency is enhanced while the diameter of the separator housing is minimized.
摘要翻译：用于使用螺杆压缩机的制冷系统的油分离器包括大致圆柱形的垂直竖立的壳体，其底部限定了油底壳，并且其顶部被将油分离器连接到制冷系统冷凝器的排放导管穿透。排放管道的中心线与分离器壳体的中心线平行但偏离，使排出管道与壳体不同心。结果，可以使分离器内部的扩大的切向入口不受排放管道的阻碍。因此，在进入分离器之前，从压缩机排出的混合物通过的横截面流动面积可以同样地增加。结果，由于油分离过程导致制冷剂气体的压降降低，并且在分离器壳体的直径最小化的同时整体系统效率得到提高。

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