James M Gu

US Patent:

7028768, Apr 18, 2006

Filed:

Aug 20, 2003

Appl. No.:

10/644307

Inventors:

Mark Dennis Aler - Skokie IL, US
James Jin-Hao Gu - Wheeling IL, US
Karen Jo Sanchez - Chicago IL, US

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

F25D 17/02

US Classification:

165219, 165205, 165101, 165283, 165246, 62185, 62201, 62175, 62435, 62 99

Abstract:

A method of controlling a hydronic system is provided. The hydronic system includes a plurality of fluid heat exchange units for feeding a load, and a bypass valve for bypassing the load. The method includes operating at least a first and a second fluid heat exchange unit in the hydronic system to heat or cool a fluid. An output fluid flow of each of the operating fluid heat exchange units is monitored. The monitored output fluid flow of each fluid heat exchange unit is compared to a predetermined fluid flow setpoint. The output fluid flow of each of the operating fluid heat exchange units is adjusted towards the predetermined fluid flow setpoint if the monitored output flow is different from the predetermined fluid flow setpoint by at least a predetermined margin. A combined output fluid flow of the operating fluid heat exchange units is also monitored. The bypass valve is at least partially opened if the combined output fluid flow is below a predetermined minimum combined output fluid flow.

US Patent:

8630814, Jan 14, 2014

Filed:

Jan 31, 2011

Appl. No.:

13/017871

Inventors:

Andrew A. Cheng - Wilmette IL, US
James J. Gu - Buffalo Grove IL, US
John E. Branzell - Skokie IL, US

Assignee:

Xylem IP Holdings LLC. - White Plaines NY

International Classification:

G01F 23/296

US Classification:

702 55

Abstract:

Apparatus, including an ultrasonic liquid level gauge and control system, includes a gauge configured to be coupled on the outside of a device, having a boiler or hot water tank, having liquid contained therein. The gauge is also configured to receive and contain a small part of the liquid of the device; and an ultrasonic transducing and signal processing arrangement configured to: reflect an ultrasonic pulse off a liquid surface of the small part of the liquid of the device contained in the gauge, and determine the level of liquid in the device based at least partly on a time of flight analysis related to the ultrasonic pulse reflected off the liquid surface of the small part of the liquid of the device contained in the gauge.

US Patent:

20120173027, Jul 5, 2012

Filed:

Dec 30, 2010

Appl. No.:

12/982286

Inventors:

Andrew A. CHENG - Wilmette IL, US
James J. GU - Buffalo Grove IL, US

Assignee:

ITT MANUFACTURING ENTERPRISES, INC. - Wilmington DE

International Classification:

G05D 7/06
G05D 16/20

US Classification:

700282

Abstract:

The present invention provides, e.g., apparatus comprising at least one processor; at least one memory including computer program code; the at least one memory and computer program code being configured, with at least one processor, to cause the apparatus at least to: respond to signaling containing information about an instant pressure and a flow rate of fluid being pumped in a pumping system, and obtain an adaptive control curve based at least partly on the instant pressure and flow rate using an adaptive moving average filter. The adaptive moving average filter may be based at least partly on a system flow equation: SAMA=AMAF(Q/√{square root over (ΔP)}), where the function AMAF is an adaptive moving average filter (AMAF), and the parameters Q and ΔP are a system flow rate and differential pressure respectively. The at least one memory and computer program code may be configured to, with the at least one processor, to cause the apparatus at least to obtain an optimal control pressure set point from the adaptive control curve with respect to an instant flow rate or a moving average flow rate as SP=MA(Q)/SAMA, where the function MA is a moving average filter (MA), to obtain a desired pump speed through a PID control.

US Patent:

20140005841, Jan 2, 2014

Filed:

Dec 17, 2012

Appl. No.:

13/717086

Inventors:

James J. GU - Buffalo Grove IL, US
Graham A. SCOTT - Prospect Heights IL, US

Assignee:

Fluid Handling LLC - Morton Grove IL

International Classification:

G05D 7/06

US Classification:

700282

Abstract:

Apparatus, such as a pump controller, features a signal processor configured at least to: receive signaling containing information about a linear set point control curve based at least partly on an adaptive set point control curve related to fluid being pumped by a pump in a pumping system, and determine a control set point based at least partly on the signaling received. The signal processor may be configured to provide a control signal containing information to control the pump based on the control set point determined.

US Patent:

58380779, Nov 17, 1998

Filed:

Jul 12, 1995

Appl. No.:

8/501396

Inventors:

Darrell N. Chelcun - Buffalo Grove IL
James H. Gu - Wheeling IL

Assignee:

Pittway Corporation - Chicago IL

International Classification:

H01H 3500

US Classification:

307130

Abstract:

An AC load switching system predicts when a zero voltage cross-over condition will exist for purposes of switching an AC load to minimize inrush currents. Prediction is carried out by characterizing the switching devices, which preferably are electromechanical in nature, and determining closure and bounce delays associated with each type of switching device. The system includes a processor, which could be a programmed microprocessor. The processor stores characterization parameters for the load switching elements including closure delay time as well as bounce time intervals. The processor energizes a switching element to close same at a time during the AC line cycle such that when the delay interval has passed and one half of the bounce interval has passed, the line voltage will be at a cross-over or zero voltage condition thereby resulting in minimal inrush current when the contacts have completely closed. Multi-phased loads can be switched at respective zero voltage cross-over conditions by adjusting load switching element energizing times by the delay of each of the respective phases. In a 60 hertz 3 phase system the delays are adjusted by 5. 55 and 11.

US Patent:

20200291932, Sep 17, 2020

Filed:

Mar 23, 2020

Appl. No.:

16/826556

Inventors:

- Morton Grove IL, US
Christopher S. JOHNSON - Gurnee IL, US
James J. GU - Buffalo Grove IL, US
Kyle SCHOENHEIT - Waterloo NY, US

International Classification:

F04B 49/06

Abstract:

An automatic self-driving pump system features a pump/motor/drive detector and an automatic self-driving and control design/setup module. In operation, the pump/motor/drive detector receives sensed signaling containing information about a pump/drive for operating in a hydronic pump system, e.g., stored in and sensed from a signature chip or barcode installed that can be scanned by a scanner, and provides corresponding database signaling containing information about parameters for providing automatic pump control design, setup and run to control the pump/drive for operating in the hydronic pump system, based upon the sensed signaling received. The automatic self-driving and control design/setup module receives the corresponding database signaling, and provides control signaling containing information for providing the automatic pump control design, setup and run to control the pump/drive for operating in the hydronic pump system, based upon the corresponding database signaling received.

US Patent:

20190376507, Dec 12, 2019

Filed:

Jun 10, 2019

Appl. No.:

16/436314

Inventors:

- Morton Grove IL, US
James J. GU - Buffalo Grove IL, US

International Classification:

F04B 49/06
F04B 23/04

Abstract:

Apparatus features a controller having a signal processor or processing module configured to: receive signaling containing information about a power profile that is specific to a pumping system having N parallel pumps and based upon data related to one or more of pumping system power, losses and wire-to-water efficiency in real time for the N parallel pumps configured to run in the pumping system to generate a head H and a flow F with an efficiency E, and at least one calculation/prediction of at least one corresponding efficiency of at least one combination/number of N−1 and/or N+1 parallel pumps to achieve a corresponding/same head H and flow F with a corresponding efficiency; and determine corresponding signaling containing information to control the operation of the pumping system that depends on a comparison of the efficiency E and the at least one corresponding efficiency, based upon the signaling received, including staging/destaging a pump to or from the pumping system.

US Patent:

20180320684, Nov 8, 2018

Filed:

Nov 14, 2017

Appl. No.:

15/812555

Inventors:

- Morton Grove IL, US
James J. GU - Buffalo Grove IL, US
Taifur RAHMAN - Skokie IL, US

International Classification:

F04B 49/20
G05B 19/05
F04B 49/06
F04B 51/00

Abstract:

A pumping system featuring a pump, motor, a bearing assembly, integrated data acquisition system and combined programmable logic controller (PLC), data acquisition and modem. The pump couples to a pump shaft that responds to a pump shaft force to pump a liquid. The motor couples to the pump shaft, responds to VFD/VSD control signaling and provides the pump shaft force to drive the pump shaft. The bearing assembly includes a bearing with the pump shaft arranged therein and couples the pump and the motor. The variable frequency/speed drive (VFD/VSD) receives PLC control signaling and provides the VFD/VSD control signaling to drive the motor. The integrated data acquisition system responds to PLC data acquisition signaling, and provides integrated data acquisition system signaling containing information about an integrated set of pumping system parameters related to the pump, the bearing assembly, the motor and the VFD/VSD in the pump system. The combined programmable logic controller (PLC), data acquisition and modem provides the PLC data acquisition signaling and receive the integrated data acquisition signaling, provides PLC data acquisition modem signaling that exports performance data to the Internet to allow remote manual monitoring of the pump system, and provides the PLC control signaling to control the VFD/VSD and operate the pumping system as a controlled, closed loop system.