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    • 1. 发明申请
    • METHOD AND SYSTEM FOR ROTOR COOLING
    • 转子冷却方法与系统
    • WO2009088846A1
    • 2009-07-16
    • PCT/US2008/088520
    • 2008-12-30
    • JOHNSON CONTROLS TECHNOLOGY COMPANYSOMMER, Steven T.
    • SOMMER, Steven T.
    • F25B1/10F25B31/00
    • F25B1/10F25B31/006F25B2400/13
    • A motor coolant method and system is used to cool a compressor motor (36) in a refrigeration system having a multi-stage compressor (38). The compressor includes a first compressor stage (42) and a second compressor stage (44), the first compressor stage providing compressed refrigerant to an input of the second compressor stage. The motor coolant system has a first connection with the refrigerant loop to receive refrigerant into the motor cavity for cooling, the received refrigerant provided from a system component having a high pressure, and a second connection with the refrigerant loop to return refrigerant to an intermediate pressure greater than an evaporator operating pressure. The pressure inside the motor cavity may be approximately the pressure within the first stage discharge and second stage suction to minimized seal leakage between the motor cavity and the internal pressures of the first and second stage compressors.
    • 电动机冷却剂方法和系统用于冷却具有多级压缩机(38)的制冷系统中的压缩机电动机(36)。 压缩机包括第一压缩机级42和第二压缩机级44,第一压缩机级将压缩的制冷剂提供给第二压缩机级的输入。 电动机冷却剂系统具有与制冷剂回路的第一连接,以将制冷剂接收到电动机腔中进行冷却,从具有高压的系统部件提供的接收的制冷剂和与制冷剂回路的第二连接以使制冷剂回到中间压力 大于蒸发器的操作压力。 电动机腔内的压力可以近似为第一级排放和第二级抽吸期间的压力,以最小化电动机空腔与第一级和第二级压缩机的内部压力之间的密封泄漏。
    • 5. 发明公开
    • VARIABLE GEOMETRY DIFFUSER HAVING EXTENDED TRAVEL
    • DIFFUSOR MIT VARIABLER GEOMETRIE UNDVERLÄNGERTEMWEG
    • EP3171034A1
    • 2017-05-24
    • EP16197148.6
    • 2013-11-04
    • Johnson Controls Technology Company
    • SOMMER, Steven T.SCHREIBER, Jan W.KAUFFMAN, Justin P.NENSTIEL, Kurt F.
    • F04D29/46F04D27/02F04D29/058
    • An improved variable geometry diffuser (VGD) mechanism for use with a centrifugal compressor. This VGD mechanism extends substantially completely into the diffuser gap so that the VGD mechanism may be used more fully to control other operational functions. The VGD mechanism may be used to minimize compressor backspin and associated transient loads during compressor shut down by preventing a reverse flow of refrigerant gas through the diffuser gap during compressor shutdown, which is prevented because the diffuser gap is substantially blocked by the full extension of the diffuser ring. During start-up, transient surge and stall also can be effectively eliminated as gas flow through the diffuser gap can be impeded as load and impeller speed increase, thereby alleviating the problems caused by startup loads at low speeds. The VGD mechanism can be used for capacity control as well so as to achieve more effective turndown at low loads.
    • 一种用于离心式压缩机的改进的可变几何扩散器(VGD)机构。 该VGD机构基本上完全扩展到扩散器间隙中,使得可以更全面地使用VGD机构来控制其他操作功能。 VGD机构可以用于在压缩机关闭期间通过防止制冷剂气体在压缩机关闭期间通过扩散器间隙的反向流动来最小化压缩机反向旋转和相关联的瞬时负载,这是由于扩散器间隙基本上被 扩散器环。 在启动过程中,由于负载和叶轮速度的增加可能会阻碍通过扩散器间隙的气体流动,因此可以有效地消除瞬态浪涌和失速,从而减轻低速起动负载引起的问题。 VGD机构也可用于容量控制,以便在低负载下实现更有效的调节。