Kenneth E Hickman

US Patent:

20100251742, Oct 7, 2010

Filed:

May 14, 2010

Appl. No.:

12/780527

Inventors:

Jeffrey Lee Tucker - Wichita KS, US
Jeremiah Marshall Horn - Derby KS, US
Jeffrey Norris Nichols - Wichita KS, US
Thomas John Martin - Goddard KS, US
Gregory Ralph Harrod - Wichita KS, US
Kenneth E. Hickman - York PA, US

Assignee:

Johnson Controls Technology Company - Holland MI

International Classification:

F25B 13/00
F25B 1/00
F25B 41/04

US Classification:

623246, 62498, 62513

Abstract:

An HVAC&R system is disclosed that utilizes energy-efficient valving. The valving controls the flow of refrigerant and may be adapted for evaporator or condenser applications, on both AC systems and heat pumps (as well as chillers and other refrigeration systems). The valving may provide simultaneous and individualized control of flow through individual coils or groups of coils for improved control of evaporation, condensation, defrosting and so forth. In some configurations a common sensor may be shared between individual coils or groups of coils and may provide sensed parameters to control circuitry for controlling the valving. Other configurations may include bypass valving to direct fluid around the flow control valving. In yet other configurations, a valve may be used to bypass tapped vapor around a heat exchanger functioning as an evaporator.

US Patent:

60356480, Mar 14, 2000

Filed:

Aug 3, 1998

Appl. No.:

9/127984

Inventors:

Kenneth E. Hickman - York PA
John F. Judge - Stewartstown PA

Assignee:

York International Corporation - York PA

International Classification:

F25B 4500

US Classification:

62 77

Abstract:

A method of charging and recharging a refrigerant loop with a ternary refirgerant composition, wherein substantially equal proportions of difluoromethane and pentafluoroethane are added to the loop in substantially equal proportion by mass, during the step of charging and recharging.