Herman H Viegas

US Patent:

6609382, Aug 26, 2003

Filed:

Jun 4, 2002

Appl. No.:

10/162436

Inventors:

David J. Vander Woude - Farmington MN
Herman H. Viegas - Bloomington MN
Jayaram Seshadri - Minneapolis MN
Joseph Louis Glentz - Winona MN
Bryan Edward Schwichtenberg - East Troy WI
William Ehrich Stuart - Winona MN

Assignee:

Thermo King Corporation - Minneapolis MI

International Classification:

F17C 902

US Classification:

62 502, 62223, 62155

Abstract:

A method of temperature control in a cryogenic system, wherein the system includes a cryogenic tank. The method comprises providing a motor speed sensor which determines a motor speed, providing a pressure sensor which determines a cryogenic pressure, providing a temperature sensor in the conditioned space which measures a temperature within the conditioned space, providing a deprived integral region, and generating an overriding control signal at the proportional-integral-derivative controller when the temperature and the pressure are beyond a temperature set point and a pressure set point.

US Patent:

6631621, Oct 14, 2003

Filed:

Jul 1, 2002

Appl. No.:

10/187459

Inventors:

David J. VanderWoude - Farmington MN
Herman H. Viegas - Bloomington MN
Jayaram Seshadri - Minneapolis MN
Joseph Louis Glentz - Winona MN
Bryan Edward Schwichtenberg - East Troy WI
J. J. Shaw - Savage MN

Assignee:

Thermo King Corporation - Minneapolis MN

International Classification:

F25D 1702

US Classification:

62201, 62 502, 62185, 62216

Abstract:

A method of temperature control in a cryogenic temperature control apparatus comprises providing a heat exchanger in thermal communication with an air-conditioned space. The heat exchanger includes an air inlet and an evaporator coil having an outlet. The method further comprises providing a first temperature sensor being operatively coupled to a controller, measuring the temperature in the outlet and sending the temperature in the outlet to the controller, providing a second temperature sensor being operatively coupled to the controller, measuring the temperature in the air inlet, and sending the temperature in the air inlet to the controller, and providing a plurality of temperature control values. The flow of cryogen from a storage tank to the evaporator coil is altered each time the temperature in the outlet passes one of a first plurality of temperature control values and each time the temperature in the air inlet passes one of a second plurality of temperature control values.

US Patent:

6698212, Mar 2, 2004

Filed:

Jun 27, 2002

Appl. No.:

10/185757

Inventors:

Herman H. Viegas - Bloomington MN
David J. Vander Woude - Farmington MN
Jayaram Seshadri - Minneapolis MN
John J. Shaw - Savage MN

Assignee:

Thermo King Corporation - Minneapolis MN

International Classification:

F17C 902

US Classification:

62 502, 62239, 62201

Abstract:

A cryogenic temperature control apparatus comprises a storage tank housing a quantity of cryogenic fluid, a housing defining a conditioned space, and a heat exchanger in thermal communication with the conditioned space. A first flow path fluidly connects the storage tank and the heat exchanger. A first valve is positioned along the first flow path to selectively fluidly seal the first flow path between the storage tank and the heat exchanger. A second flow path fluidly connects the storage tank and the heat exchanger. A second valve is positioned along the second flow path to selectively fluidly seal the second flow path between the storage tank and the heat exchanger.

US Patent:

6751966, Jun 22, 2004

Filed:

May 22, 2002

Appl. No.:

10/153097

Inventors:

Herman H. Viegas - Bloomington MN
David J. Vander Woude - Farmington MN
Hans-Olof Nilsson - Agnesberg, SE

Assignee:

Thermo King Corporation - Minneapolis MN

International Classification:

F25B 4900

US Classification:

62131, 62186, 62175

Abstract:

A method of operating a hybrid temperature control system. The method provides an evaporator, which has a discharge line, a supply line, and a evaporator coil. The evaporator coil is in fluid communication with the discharge line and the supply line. The method also provides a microprocessor, which regulates a supply of a heat absorbing fluid to the evaporator. The method further couples a sensor module to the microprocessor. The sensor module is near the evaporator, senses a temperature of a gas exiting the evaporator, and sends a temperature to the microprocessor. The method also turns off the supply of the heat absorbing fluid to the evaporator when the microprocessor determines that the temperature of the gas exiting the evaporator reaches a predetermined temperature.

US Patent:

6895764, May 24, 2005

Filed:

May 2, 2003

Appl. No.:

10/428717

Inventors:

Herman H. Viegas - Bloomington MN, US
Jayaram Seshadri - Minneapolis MN, US

Assignee:

Thermo King Corporation - Minneapolis MN

International Classification:

F17C009/02
F25D015/00

US Classification:

62 502, 62237

Abstract:

An apparatus and a method for conditioning air in a plurality of spaced apart and thermally separated conditioned spaces with a cryogenic temperature control apparatus. The apparatus includes a storage tank housing a cryogen, an evaporator coil being selectively moveable into and out of thermal communication with the plurality of conditioned spaces for alternately conditioning air in the plurality of conditioned spaces, and a flow path fluidly connecting the storage tank and the evaporator coil.

US Patent:

7021341, Apr 4, 2006

Filed:

Jun 18, 2004

Appl. No.:

10/871284

Inventors:

Herman H. Viegas - Minneapolis MN, US
Osten Andersson - Köpingebro, SE
Torgeir Hansen - Finstadjordet, NO
Nils Magnus Sølverød - Oslo, NO

Assignee:

Norsk Hydro ASA - Oslo
Thermo King Corporation - Minneapolis MN

International Classification:

B65B 1/04

US Classification:

141 82, 141 59

Abstract:

A method for distribution and sales of cryogenic fluids, in particular CO2, includes a system of filling stations for cryogenic fluids provided in connection with ordinary service stations for the filling of fuels to motor driven vehicles. The filling stations for cryogenic fluids include at least a stationary storage tank () and dispenser () with flexible hoses () and a quick connector () for easy connection to a mobile tank () on a truck or the like. The filling station further includes a pressure/flow control column () with a phase separator () provided between the stationary storage tank () and the dispenser.

US Patent:

8020407, Sep 20, 2011

Filed:

Apr 28, 2008

Appl. No.:

12/110613

Inventors:

Herman H. Viegas - Bloomington MN, US

Assignee:

Thermo King Corporation - Minneapolis MN

International Classification:

F25J 1/00

US Classification:

62613, 62 471, 62118

Abstract:

A temperature-controlled vehicle including a cascade refrigeration system having a booster cooling line configured to supplement the cooling capacity of the cascade refrigeration system by expanding and venting a portion of a cryogenic refrigerant to the atmosphere during peak demands while the cascade refrigeration system continues to operate.

US Patent:

8037704, Oct 18, 2011

Filed:

May 22, 2008

Appl. No.:

12/125097

Inventors:

Herman H. Viegas - Bloomington MN, US

Assignee:

Thermo King Corporation - Minneapolis MN

International Classification:

B60H 1/32

US Classification:

62239

Abstract:

A refrigeration system configured for use with a trailer including a container having a roof, a first sidewall, and a second sidewall. The refrigeration system includes a refrigeration unit configured to couple to the trailer and operable to condition the container. The refrigeration system also includes a duct in fluid communication between the refrigeration unit and an opening in the first sidewall. The duct is configured to direct an airflow in at least one of a first direction toward the refrigeration unit and a second direction away from the refrigeration unit.