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公开(公告)号：US5746062A
公开(公告)日：1998-05-05
申请号：US630842
申请日：1996-04-11
CPC分类号： F25B1/053 , F04D27/001 , F04D27/02 , F04D27/0261 , F25B49/022 , F25B49/025 , H02H7/08 , F25B2500/19 , F25B2600/021 , F25B2600/0253 , F25B2700/1931 , F25B2700/1933 , F25B2700/195 , F25B2700/197 , Y02B30/741
摘要： A surge detection system for use in a fluid system having a load driven by a centrifugal compressor, the compressor being driven by an electric motor. The surge detection system comprises a means for sensing a differential pressure developed across the compressor and a means for sensing a current representing input power to the motor. The surge detection system further comprises a first computing means responsive to the differential pressure developed across the compressor for indicating when a valid surge is occurring in the compressor, and a second computing means responsive to the variable speed drive current for indicating when a valid surge is occurring in the compressor.
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公开(公告)号：US5894736A
公开(公告)日：1999-04-20
申请号：US988782
申请日：1997-12-11
CPC分类号： F25B1/053 , F04D27/001 , F04D27/02 , F04D27/0261 , F25B49/022 , F25B49/025 , H02H7/08 , F25B2500/19 , F25B2600/021 , F25B2600/0253 , F25B2700/1931 , F25B2700/1933 , F25B2700/195 , F25B2700/197 , Y02B30/741
摘要： A surge detection system for use in a fluid system having a load driven by a centrifugal compressor, the compressor being driven by an electric motor. The surge detection system comprises a means for sensing a differential pressure developed across the compressor and a means for sensing a current representing input power to the motor. The surge detection system further comprises a first computing means responsive to the differential pressure developed across the compressor for indicating when a valid surge is occurring in the compressor, and a second computing means responsive to the variable speed drive current for indicating when a valid surge is occurring in the compressor.
摘要翻译： 一种用于具有由离心式压缩机驱动的负载的流体系统中的浪涌检测系统，该压缩机由电动机驱动。 浪涌检测系统包括用于感测跨压缩机产生的压差的装置和用于感测表示对电动机的输入功率的电流的装置。 浪涌检测系统还包括第一计算装置，其响应于压缩机两端产生的差压，用于指示压缩机中何时发生有效浪涌;以及第二计算装置，响应于可变速度驱动电流，用于指示何时有效浪涌是 发生在压缩机中。
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公开(公告)号：US06211792B1
公开(公告)日：2001-04-03
申请号：US09373500
申请日：1999-08-13
IPC分类号： G08B2100
CPC分类号： H02H7/0844 , H02H7/0816
摘要： Methods and systems consistent with this invention detect a failed short thyristor in a solid-state controller for delivering power to a load during reduced-voltage operation. Methods and systems consistent with this invention detect a voltage across the thyristor, and indicate a failed short thyristor when the absolute value of the voltage across the thyristor remains below a threshold value during a predetermined period of time. Methods and systems consistent with this invention detect a failed open thyristor in a solid-state controller during full-voltage operation. Methods and systems consistent with this invention detect a voltage across the thyristor, and indicate a failed open thyristor when the absolute value of the voltage across the thyristor exceeds a threshold value.
摘要翻译： 与本发明一致的方法和系统检测固态控制器中的故障短晶闸管，用于在降压操作期间向负载输电。 与本发明一致的方法和系统检测晶闸管两端的电压，并且在预定时间段期间当晶闸管两端的电压的绝对值保持低于阈值时，指示故障的短晶闸管。 符合本发明的方法和系统在全电压操作期间检测固态控制器中的故障开路晶闸管。 与本发明一致的方法和系统检测晶闸管两端的电压，并且当晶闸管两端的电压的绝对值超过阈值时，指示失效的开路晶闸管。
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公开(公告)号：US11378088B2
公开(公告)日：2022-07-05
申请号：US13375986
申请日：2010-06-04
申请人： Steven T. Sommer , Curtis Christian Crane , Florin Iancu , John Trevino, Jr. , Robert E. Stabley , Gregory K. Beaverson , Eric J. Smyder , Patrick C. Marks , Rudy Chervil
发明人： Steven T. Sommer , Curtis Christian Crane , Florin Iancu , John Trevino, Jr. , Robert E. Stabley , Gregory K. Beaverson , Eric J. Smyder , Patrick C. Marks , Rudy Chervil
IPC分类号： F04D27/02 , F04B49/06 , F04D29/058 , F04D27/00
摘要： A control system is provided that can identify the occurrence of a single surge cycle in centrifugal compressor using various methods and devices. Once the occurrence of a single surge cycle is identified, the control system can take remedial action to respond to the surge cycle, such as by adjusting the position of a variable geometry diffuser, and restore the centrifugal compressor to stable operation.
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公开(公告)号：US06202431B1
公开(公告)日：2001-03-20
申请号：US09232558
申请日：1999-01-15
IPC分类号： F25B4100
CPC分类号： F25B1/053 , F04D27/0207 , F25B41/04 , F25B41/043 , F25B49/02 , F25B2600/0261
摘要： An adaptive control apparatus and a method for automatically controlling a refrigeration system as a function of cooling load and head. A control panel controls the operation of a hot gas bypass valve so as to avoid surging of the compressor in response to cooling load and head. The control apparatus and method also allow for automatic self calibration.
摘要翻译： 一种自适应控制装置和用于根据冷却负载和头部自动控制制冷系统的方法。 控制面板控制热气旁通阀的操作，以避免压缩机响应于冷却负载和头部的浪涌。 控制装置和方法还允许自动自校准。
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公开(公告)号：US6026650A
公开(公告)日：2000-02-22
申请号：US232557
申请日：1999-01-15
CPC分类号： B67D1/0864 , F25B47/006
摘要： A freeze point protection method and system is provided for water cooled chillers. The method prevents freezing of chilled water and damage to the chiller. The method allows the evaporator temperature to drop below a freezing temperature for a predetermined amount of time prior to shutting down the chiller. The temperature of the refrigerant in the water chiller is periodically sensed. The amount of time that the chiller is below a predetermined freezing temperature is periodically counted and compared with a determined maximum time that the chiller may operate at a sensed temperature below the predetermined freezing temperature without damaging the chiller. The method will shut down the water chiller if the counted time exceeds the determined maximum time. A system for shutting down a water cooled chiller to prevent freezing of chilled water is also provided.
摘要翻译： 为水冷式冷水机组提供了一种冻点保护方法和系统。 该方法可防止冷冻水冻结并损坏冷冻机。 该方法允许蒸发器温度在关闭冷却器之前降低到低于冰点温度一段预定的时间。 定期检测水冷却器中制冷剂的温度。 周期性地计数冷却器低于预定的冷冻温度的时间，并与冷却器可以在低于预定冷冻温度的感测温度下操作的确定的最大时间进行比较，而不损坏冷却器。 如果计时时间超过确定的最大时间，则该方法将关闭冷水机组。 还提供了一种用于关闭冷却水冷却器以防止冷冻水冻结的系统。
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7.发明授权公开(公告)号：US06330806B1
公开(公告)日：2001-12-18
申请号：US09513456
申请日：2000-03-03
IPC分类号： F25D1702
CPC分类号： G06F9/44573 , F24F11/30 , F24F11/62 , G05B19/0426 , G05B2219/25107 , G05B2219/2638
摘要： A heating, ventilation, and air-conditioning (HVAC) control system and method for controlling a device, a subsystem, and/or a process using a flash mini-card. Preferably, the present invention is directed to an HVAC control system and method for controlling a chiller and the devices and subsystems associated with the chiller using a flash mini-card. More preferably, the present invention obviates the need for the HVAC control system and method to use at least one of the following: a hard disk, a disk controller, a card reader, or a card controller. The method includes, for example, applying power to the HVAC control system, wherein the step of applying power initiates a boot-up of a processor associated with the HVAC control system; reading a default memory location, wherein the contents of the default memory location direct the processor to a Basic Input/Output System (BIOS) connected to the processor through a bus; configuring the processor associated with the HVAC control system by executing a set of BIOS instructions within the BIOS, wherein after the step of configuring, the processor reads a set of boot instructions that directs the processor to the flash mini-card containing a set of instructions; and performing at least one of the set of instructions contained within the flash mini-card to control the HVAC system using the HVAC control system.
摘要翻译： 加热，通风和空调（HVAC）控制系统以及用于控制装置，子系统和/或使用闪存迷你卡的处理的方法。 优选地，本发明涉及一种用于控制冷却器的HVAC控制系统和方法以及使用闪存迷你卡与冷却器相关联的设备和子系统。 更优选地，本发明不需要HVAC控制系统和方法来使用以下至少一个：硬盘，盘控制器，读卡器或卡控制器。 该方法包括例如向HVAC控制系统施加电力，其中施加电力的步骤启动与HVAC控制系统相关联的处理器的引导; 读取默认存储器位置，其中默认存储器位置的内容将处理器引导到通过总线连接到处理器的基本输入/输出系统（BIOS）; 通过在BIOS中执行一组BIOS指令来配置与HVAC控制系统相关联的处理器，其中在配置步骤之后，处理器读取一组引导指令，其将处理器引导到包含一组指令的闪存迷你卡 ; 以及执行包含在所述闪存迷你卡内的所述一组指令中的至少一个以使用所述HVAC控制系统来控制所述HVAC系统。
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公开(公告)号：US20120100011A1
公开(公告)日：2012-04-26
申请号：US13375986
申请日：2010-06-04
申请人： Steven T. Sommer , Curtis Christian Crane , Florin Iancu , John Trevino, JR. , Robert E. Stabley , Gregory K. Beaverson , Eric J. Smyder , Patrick C. Marks , Rudy Chervil
发明人： Steven T. Sommer , Curtis Christian Crane , Florin Iancu , John Trevino, JR. , Robert E. Stabley , Gregory K. Beaverson , Eric J. Smyder , Patrick C. Marks , Rudy Chervil
CPC分类号： F04D27/02 , F04D27/001 , F04D27/0246 , F04D27/0261 , F04D29/058 , F05D2270/335
摘要： A control system is provided that can identify the occurrence of a single surge cycle in centrifugal compressor using various methods and devices. Once the occurrence of a single surge cycle is identified, the control system can take remedial action to respond to the surge cycle, such as by adjusting the position of a variable geometry diffuser, and restore the centrifugal compressor to stable operation.
摘要翻译： 提供一种控制系统，其可以使用各种方法和装置来识别离心式压缩机中单个浪涌循环的发生。 一旦识别到单个浪涌循环的发生，则控制系统可以采取补救措施来响应浪涌循环，例如通过调节可变几何扩散器的位置，并将离心压缩机恢复到稳定的运行。
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公开(公告)号：US4698685A
公开(公告)日：1987-10-06
申请号：US867432
申请日：1986-05-28
申请人： Gregory K. Beaverson
发明人： Gregory K. Beaverson
CPC分类号： H04N5/3653
摘要： Nonuniformities in the pixel of a CCD are corrected by storing a correction value for every pixel of the CCD. The pixel values from the CCD are transferred to a multiplier. The correction values are also transferred to the multiplier in synchronization with the transfer of the pixel values. The correction values and the pixel values are multiplied to produce a corrected pixel value for every pixel of the CCD. The corrected pixel values are transferred to an image processor for appropriate data processing.
摘要翻译： 通过存储CCD的每个像素的校正值来校正CCD的像素中的不均匀性。 来自CCD的像素值被传送到乘法器。 校正值也与像素值的传送同步地传送到乘法器。 校正值和像素值相乘以产生CCD的每个像素的校正像素值。 校正的像素值被传送到图像处理器以进行适当的数据处理。
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公开(公告)号：US06691525B2
公开(公告)日：2004-02-17
申请号：US10151242
申请日：2002-05-21
IPC分类号： F25B4104
CPC分类号： F25B1/053 , F04D27/0207 , F25B41/04 , F25B41/043 , F25B49/02 , F25B2600/0261
摘要： Methods and systems consistent with this invention control a hot gas bypass valve in a refrigeration system including a centrifugal compressor, a condenser, an evaporator, and a hot gas bypass line between the compressor and the evaporator. Such methods and systems continuously sense for a surge condition during operation of the refrigeration system, indicate a surge condition when the refrigeration system is operating under surge conditions, and open at least partially the hot gas bypass valve in response to the sensed surge condition to return the refrigeration system to operating under non-surge conditions. Methods and systems consistent with this invention also sense a present head parameter representative of the present head of the compressor, sense a present load parameter representative of the present load, and control the hot gas bypass valve so as to avoid surging in the compressor in response to the present head parameter, the present load parameter, and stored head and load parameters.
摘要翻译： 与本发明一致的方法和系统控制包括离心压缩机，冷凝器，蒸发器和在压缩机和蒸发器之间的热气旁通管线的制冷系统中的热气旁通阀。 这种方法和系统在制冷系统的操作期间持续感觉到喘振状况，指示当制冷系统在喘振状态下运行时的喘振状况，并响应于感测到的喘振条件至少部分地打开热气旁通阀以返回 制冷系统在非浪涌条件下运行。 符合本发明的方法和系统还感测到表示压缩机当前头部的当前头部参数，感测代表当前负载的当前负载参数，并且控制热气体旁通阀，以避免压缩机响应中的喘振 到当前头参数，当前负载参数，以及存储的头和负载参数。
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