Joel C Vanderzee from 2727 Paul Pl, La Crosse, WI 54601, age 56, Phone: 608 788-5046

Resumes

Joel Rebecca Vanderzee

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Engineer At Not Provided

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Location:

La Crosse, Wisconsin Area

Industry:

Research

Experience:

not provided (Research industry): Engineer, (-)

Us Patents

Multiple Device Communications
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US Patent:

7020156, Mar 28, 2006
Filed:

Dec 15, 2000
Appl. No.:

09/738834
Inventors:

Joel C. Vanderzee - La Crosse WI, US
Robert M. Swanson - La Crosse WI, US
Assignee:

American Standard International Inc. - New York NY
International Classification:

H04L 12/403
H04L 12/56
H04L 12/43
US Classification:

370451, 370392, 370461
Abstract:

A communications protocol for a communications bus wherein messages are transmitted to a plurality of devices communicating by a bus. Each message includes a unique code indicating the end of the message and that same unique code triggers a transfer of communications control to another device of the plurality of devices.

Variable Frequency Charge Pump In Capacitive Level Sensor
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US Patent:

7421896, Sep 9, 2008
Filed:

Dec 2, 2005
Appl. No.:

11/293620
Inventors:

Joel C. Vanderzee - La Crosse WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

G01F 23/26
US Classification:

73304C
Abstract:

A method of determining a fluid or material level. The method comprises the steps of: providing, at a first frequency, a current operatively capable of changing a capacitor; charging at least first and second capacitive devices to a predetermined voltage using the provided current; measuring the amount of current respectively necessary to charge the first and second capacitive devices to the predetermined voltage; determining a liquid level based on the measured signals from charging the first and second capacitive devices; and varying the first frequency.

Calibrating Stepper Motor By Driving Fractional Ranges
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US Patent:

7656115, Feb 2, 2010
Filed:

Jun 15, 2007
Appl. No.:

11/818821
Inventors:

Joel C. VanderZee - La Crosse WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

H02P 8/00
G05B 19/40
US Classification:

318696, 318114, 318116, 318685
Abstract:

A stepper motor driving a driven member is calibrated by periodically driving the member from its current operational position to an end stop of the driven member's total travel range; however, the driven member approaches the end stop in a series of ever-shorter travel segments. The first travel segment is less than ⅓ the total travel range to compensate for a possible sudden speed reversal, which can be accidentally triggered by the driven member reaching and “bouncing off” the end stop. Limiting the commanded first travel segment to less than ⅓ the total travel range prevents the driven member from reaching an opposite travel limit should the driven member suddenly reverse direction at three times the normal forward speed, wherein such triple speed is characteristic of reverse-speed situations.

Operational Limit To Avoid Liquid Refrigerant Carryover
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US Patent:

7775057, Aug 17, 2010
Filed:

Jun 15, 2007
Appl. No.:

11/818822
Inventors:

Joel C. VanderZee - La Crosse WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

F25B 1/00
US Classification:

62222, 62213, 62225, 62224, 622281
Abstract:

A refrigerant system comprising a compressor, a condenser, an electronic expansion valve, and an evaporator is controlled in a normal operating mode to meet moderate cooling loads; however, when the load approaches that which is sufficient to induce liquid refrigerant carryover from the evaporator to the compressor, the system is controlled in a capped operating mode to limit a certain thermodynamic variable rather than controlled to meet the high load. In the normal mode, the compressor and/or the expansion valve might be controlled in response to the amount of superheat of the refrigerant leaving the evaporator or the level of liquid refrigerant in the evaporator. In the capped operating mode, the compressor and/or the expansion valve might be controlled to limit a variable such as the compressor's capacity, the saturated pressure or dynamic pressure of the refrigerant entering the compressor, or the refrigerant's mass flow rate.

Method For Sensing The Liquid Level In A Compressor
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US Patent:

7874724, Jan 25, 2011
Filed:

Apr 11, 2007
Appl. No.:

11/786344
Inventors:

Ronald W. Okoren - Holmen WI, US
Jerry E. Brown - La Crosse WI, US
Joel C. VanderZee - La Crosse WI, US
Charles E. Nelson - Coon Valley WI, US
Steven K. Klingemann - West Salem WI, US
Jeffrey J. DeGroot - Onalaska WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

G01K 13/02
G01K 17/06
G01K 1/20
G01N 25/00
G01F 1/00
US Classification:

374 54, 374141, 374 29, 374135, 374152, 374 16, 374 1, 374173, 732045, 73 173, 73 116, 73292
Abstract:

Two vertically offset thermistors for sensing a fluid such as oil and refrigerant in a compressor shell are monitored by a method that takes into account rapidly changing conditions within the shell. The system can determine the fluid's sump temperature, high/low liquid levels, and can determine whether the thermistors are sensing the fluid as a liquid, gas, or a mixture of the two, such as a foam or mist of liquid and gas. For greater accuracy, thermistor readings can be dithered and filtered to provide temperature or voltage values having more significant digits than the readings originally processed through a limited-bit A/D converter. For faster response, limited microprocessor time is conserved by sampling thermistor readings at strategic periods that enable the microprocessor to identify certain conditions and temperatures via simple delta-temperature ratios and undemanding equations rather than resorting to exponential functions or lookup tables to determine time constants.

Superheat Control By Pressure Ratio
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US Patent:

8096141, Jan 17, 2012
Filed:

Jan 25, 2005
Appl. No.:

11/042615
Inventors:

Joel C. VanderZee - La Crosse WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

F25B 21/04
US Classification:

62225, 62210, 62212, 62222, 62224
Abstract:

A control method regulates an electronic expansion valve of a chiller to maintain the refrigerant leaving a DX evaporator at a desired or target superheat that is minimally above saturation. The expansion valve is controlled to convey a desired mass flow rate, wherein valve adjustments are based on the actual mass flow rate times a ratio of a desired saturation pressure to the suction pressure of the chiller. The suction temperature helps determine the desired saturation pressure. A temperature-related variable is asymmetrically filtered to provide the expansion valve with appropriate responsiveness depending on whether the chiller is operating in a superheated range, a saturation range, or in a desired range between the two.

Variable Evaporator Water Flow Compensation For Leaving Water Temperature Control
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US Patent:

8132420, Mar 13, 2012
Filed:

Nov 7, 2008
Appl. No.:

12/291244
Inventors:

Ronald W. Okoren - Holmen WI, US
Joel C. VanderZee - La Crosse WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

F25D 17/00
US Classification:

62180, 622383, 62476
Abstract:

A method of controlling a refrigerant chiller system is particularly suited for chillers where the water being chilled (or some other liquid) flows through the chiller's evaporator at a flow rate that is variable and is not directly known. To effectively control the chiller and maintain the temperature of the water leaving the evaporator at a desired target temperature, the cooling capacity of the chiller's evaporator is estimated based the degree of valve opening of an expansion valve, a pressure differential across the expansion valve, and a change in enthalpy per unit mass of the refrigerant flowing through the evaporator. In some embodiments, the chiller system includes multiple refrigerant circuits that are hermetically isolated from each other.

Method For Sensing A Fluid In A Compressor Shell
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US Patent:

8393787, Mar 12, 2013
Filed:

Dec 3, 2010
Appl. No.:

12/928115
Inventors:

Ronald W. Okoren - Holmen WI, US
Jerry E. Brown - La Crosse WI, US
Joel C. VanderZee - La Crosse WI, US
Charles E. Nelson - Coon Valley WI, US
Steven K. Klingemann - West Salem WI, US
Jeffrey J. DeGroot - Onalaska WI, US
Assignee:

Trane International Inc. - Piscataway NJ
International Classification:

G01K 7/22
G01N 25/02
G01N 25/12
US Classification:

374185, 374 5, 374141, 374 54, 374164, 374 27, 374 29, 702130
Abstract:

Two vertically offset thermistors for sensing a fluid such as oil and refrigerant in a compressor shell are monitored by a method that takes into account rapidly changing conditions within the shell. The system can determine the fluid's sump temperature, high/low liquid levels, and can determine whether the thermistors are sensing the fluid as a liquid, gas, or a mixture of the two, such as a foam or mist of liquid and gas. For greater accuracy, thermistor readings can be dithered and filtered to provide temperature or voltage values having more significant digits than the readings originally processed through a limited-bit A/D converter. For faster response, limited microprocessor time is conserved by sampling thermistor readings at strategic periods that enable the microprocessor to identify certain conditions and temperatures via simple delta-temperature ratios and undemanding equations rather than resorting to exponential functions or lookup tables to determine time constants.