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    • 1. 发明申请
    • A HYDRAULIC ACTUATOR FOR A SERVOMOTOR WITH AN END LOCK FUNCTION
    • 一种具有端锁功能的伺服电机的液压执行器
    • WO2008095499A1
    • 2008-08-14
    • PCT/DK2008/000061
    • 2008-02-07
    • SAUER-DANFOSS APSNIELSEN, BrianPLOUG, OlePATTERSON, Chad, M.
    • NIELSEN, BrianPLOUG, OlePATTERSON, Chad, M.
    • F15B11/00F15B20/00B62D5/08F16H61/42
    • F15B11/006F15B11/003F15B20/002F15B20/008F15B2211/30505F15B2211/30575F15B2211/40507F15B2211/7653F15B2211/8755F16H61/433
    • A hydraulic actuator for a hydraulic servomotor (4) is disclosed. The hydraulic servomotor (4) is of a kind having at least one defined end position, and has a first chamber (5) and a second chamber (6) associated therewith. The actuator is connected to a fluid source (2) and a fluid drain (3). The actuator comprises a first valve (7) fluidly connected between the fluid source (2) and the first chamber (5), a second valve (8) fluidly connected between the first chamber (5) and the fluid drain (3), and a third valve (9) fluidly connected between the fluid source (2) and the second chamber (6). The actuator further comprises a flow channel (10, 17), preferably comprising a flow restrictor (12, 18), in fluid communication with the second chamber (6). The valves (7, 8, 9) are such that, in the case of a power cut off, they will prevent a fluid flow out of the first chamber (5), and a fluid flow out of the second chamber (6) takes place via the flow channel (10, 17). This will cause a servomotor piston member (13) to move towards the second chamber (6), thereby moving the hydraulic servomotor (4) to an end position.
    • 公开了一种用于液压伺服电动机(4)的液压致动器。 液压伺服电动机(4)具有至少一个限定的端部位置,并且具有与其相关联的第一室(5)和第二室(6)。 致动器连接到流体源(2)和流体排放(3)。 致动器包括流体连接在流体源(2)和第一腔室(5)之间的第一阀门(7),流体连接在第一腔室(5)和流体排出口(3)之间的第二阀门(8),以及 流体连接在流体源(2)和第二室(6)之间的第三阀(9)。 致动器还包括流动通道(10,17),优选地包括与第二腔室(6)流体连通的限流器(12,18)。 阀(7,8,9)使得在断电的情况下,它们将防止流体从第一腔室(5)流出,并且流出第二腔室(6)的流体 通过流动通道(10,17)放置。 这将使伺服马达活塞构件(13)朝向第二腔室(6)移动,从而将液压伺服马达(4)移动到结束位置。
    • 4. 发明申请
    • A METHOD FOR CONTROLLING A REFRIGERATION SYSTEM
    • 一种控制制冷系统的方法
    • WO2006097106A1
    • 2006-09-21
    • PCT/DK2006/000149
    • 2006-03-15
    • DANFOSS A/STHYBO, ClausPLOUG, Ole
    • THYBO, ClausPLOUG, Ole
    • F25B49/02F25B5/02
    • F25B49/022F25B5/02F25B2400/075F25B2400/22F25B2600/0251F25B2600/0272F25B2600/21F25B2600/2513F25B2600/2519F25B2700/1931F25B2700/1933F25B2700/21171
    • A method for controlling a refrigeration system comprising a variable compressor capacity, and at least two refrigeration entities 4, e.g. display cases. Suction pressure is controlled by means of permitting/preventing a flow of refrigerant into evaporator of one or more refrigeration entities 4. Compressor capacity is controlled to match a desired capacity level and based on a signal derived from one or more properties of the one or more refrigeration entities 4, said signal reflecting a possible difference between the current compressor capacity and a current refrigeration demand of the refrigeration system. Reduces wear on compressors because switching them ON/OFF is avoided to the largest extent possible. Prevents problems relating to conflicting control strategies due to control parameters, e.g. suction pressure, being controlled by means of two or more controllable parts, e.g. compressors and flow of refrigerant into refrigeration entities.
    • 一种用于控制包括可变压缩机容量的制冷系统的方法,以及至少两个制冷实体4,例如, 展示柜。 通过允许/防止制冷剂流入一个或多个制冷实体的蒸发器来控制吸入压力。压缩机容量被控制以匹配期望的容量水平,并且基于从一个或多个制冷实体的一个或多个特性导出的信号 制冷实体4,所述信号反映当前压缩机容量与制冷系统的当前制冷需求之间的可能差异。 减少压缩机的磨损,因为在最大程度上避免了打开/关闭切换。 防止由于控制参数引起的与冲突控制策略有关的问题,例如 吸入压力,通过两个或更多个可控部件控制,例如, 压缩机和制冷剂流入制冷机构。