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1. 发明公开

EP2823240A2 HIGH PRESSURE RATIO MULTI-STAGE CENTRIFUGAL COMPRESSOR 有权转让
标题翻译：一种多级离心式压缩机高压力比
公开(公告)号：EP2823240A2
公开(公告)日：2015-01-14
申请号：EP12870829.4
申请日：2012-03-08
申请人： Danfoss Turbocor Compressors BV.
发明人： SUN, Lin , BRASZ, Joost
IPC分类号： F25B13/00
CPC分类号： F25B30/02 , F04D17/122 , F04D25/06 , F04D27/002 , F04D27/004 , F04D29/048 , F04D29/462 , F25B1/053 , F25B1/10 , F25B13/00 , F25B41/046 , F25B2600/0253 , Y02B30/741
摘要： A heat pump system includes a refrigerant circuit. First and second heat exchangers are arranged in the refrigerant circuit. A flow reversing device selectively changes a direction of flow in the refrigerant circuit between the first and second heat exchangers. A centrifugal compressor is arranged in the fluid circuit and has first and second impellers arranged in series relative to one another to provide a desired compressor pressure ratio. In one example, the centrifugal compressor mounts the first and second impellers on opposing ends of a shaft. The first and second impellers respectively include first and second stage inlets and outlets. One example desired compressor pressure ratio of at least 10:1 corresponds to a second stage outlet pressure to a first stage inlet pressure. A first diffuser is arranged at the first stage outlet, and the first diffuser is a variable geometry diffuser.

2. 发明公开

EP2655890A1 VARIABLE-SPEED OIL-FREE REFRIGERANT CENTRIFUGAL COMPRESSOR WITH VARIABLE GEOMETRY DIFFUSER 审中-公开
标题翻译：含油自由冷却和可变几何形状的扩散变速离心式压缩机
公开(公告)号：EP2655890A1
公开(公告)日：2013-10-30
申请号：EP10860902.5
申请日：2010-12-22
申请人： Danfoss Turbocor Compressors BV.
发明人： SUN, Lin , BRASZ, Joost
IPC分类号： F04D29/44
CPC分类号： F04D15/00 , F04D29/444 , F04D29/462 , F04D29/464 , F05D2250/52
摘要： A refrigerant compressor includes a housing providing a refrigerant outlet having a throat. An electric motor is provided in the housing to directly drive an impeller via a shaft about an axis in response to a variable speed command. The impeller includes an outlet end aligned with variable geometry diffuser. A magnetic bearing assembly rotationally supports the shaft relative to the housing in response to a magnetic bearing command. A member is arranged to adjust the throat area, and which can move in a direction generally parallel to the axis in response to an actuator receiving a compressor regulation command. A controller is configured to respectively provide the variable speed command, the magnetic bearing command and the compressor regulation command to the electric motor to vary throat area, the magnetic bearing assembly and the actuator to obtain a desired compressor operation without the need of variable inlet geometry.

3. 发明公开

EP2807430A2 VARIABLE-SPEED MULTI-STAGE REFRIGERANT CENTRIFUGAL COMPRESSOR WITH DIFFUSERS 有权转让
标题翻译：具有可变速度和扩散器多级离心式制冷压缩机
公开(公告)号：EP2807430A2
公开(公告)日：2014-12-03
申请号：EP12866468.7
申请日：2012-01-23
申请人： Danfoss Turbocor Compressors BV.
发明人： SUN, Lin , BRASZ, Joost , RASMUSSEN, Mogens
IPC分类号： F25B1/04
CPC分类号： F04D17/12 , F04D17/122 , F04D17/14 , F04D27/002 , F04D27/0261 , F04D29/462 , F04D29/464 , F05D2250/52 , F25B1/00 , F25B1/053 , F25B1/10 , F25B2600/0253 , Y02B30/741
摘要： A refrigeration system includes a chiller having a refrigerant loop. A compressor is part of and in fluid communication with the refrigerant loop. The compressor has two stages, one with a variable geometry diffuser and one with a fixed geometry diffuser.

4. 发明公开

EP2635772A1 CENTRIFUGAL COMPRESSOR WITH FLUID INJECTOR DIFFUSER 有权转让
标题翻译：带流体喷射器扩散器的离心式压缩机
公开(公告)号：EP2635772A1
公开(公告)日：2013-09-11
申请号：EP10859363.3
申请日：2010-11-03
申请人： Danfoss Turbocor Compressors BV.
发明人： SUN, Lin , BRASZ, Joost
IPC分类号： F01D17/08
CPC分类号： F04D27/0238 , F01D5/145 , F01D17/08 , F02C3/32 , F04D29/441 , F04D29/5846 , F04D29/681 , F04D29/684 , F05D2250/52 , F05D2270/17
摘要： A centrifugal compressor includes a housing providing in inlet, an impeller, a diffuser and a volute or collector. An electric motor is provided in the housing and is configured to drive at least one impeller via a shaft about an axis. The impeller includes an outlet end aligned with a diffuser and arranged at the throat. A variable fluid injector device is arranged downstream from the outlet end of the impeller in one example. The variable fluid injector device is configured to introduce high pressure fluid downstream from the impeller in response to a compressor regulation command. The injected fluid energizes the low momentum boundary layer, which provides compressor stability. A compressor controller is in communication with the variable fluid injection device to obtain a desired compressor operating condition.
摘要翻译：离心式压缩机包括在入口处提供的壳体，叶轮，扩散器和蜗壳或收集器。电动机设置在壳体中并且构造成经由围绕轴线的轴驱动至少一个叶轮。叶轮包括与扩散器对齐并布置在喉部处的出口端。在一个示例中，可变流体喷射器装置布置在叶轮的出口端的下游。可变流体喷射器装置构造成响应于压缩机调节命令而从叶轮向下游引入高压流体。注入的流体激发低动量边界层，这提供压缩机稳定性。压缩机控制器与可变流体喷射装置连通以获得期望的压缩机操作条件。

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