Robert A Hyde

US Patent:

57523908, May 19, 1998

Filed:

Oct 25, 1996

Appl. No.:

8/751079

Inventors:

Robert Hyde - Portland OR

International Classification:

F25B 3904
F25B 4100

US Classification:

621964

Abstract:

Conventional vapor-compression refrigeration systems modified for greater efficiencies by installation of a liquid refrigerant level sensor in the drain line after the condenser, the sensor activating a valve in the high pressure vapor line in communication with the refrigerant receiver or reservoir, and the drain line being trapped to prevent vapor in the reservoir from backing up into the condenser.

US Patent:

56644256, Sep 9, 1997

Filed:

Feb 6, 1996

Appl. No.:

8/596046

Inventors:

Robert E. Hyde - Portland OR

International Classification:

F25B 900
F25B 4100

US Classification:

62 90

Abstract:

A reheater is used in air-conditioning system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed loop. A first conduit coupling a flow of liquid refrigerant through the expansion valve into the evaporator. A second conduit coupling an outlet of the evaporator to an inlet of the compressor. A third conduit coupling an outlet of the compressor to an inlet of the condenser. A centrifugal pump is coupled to an outlet of the condenser for boosting a pressure of the condensed liquid refrigerant by an incremental pressure sufficient to pressure subcool the refrigerant. A reheater is positioned adjacent to the evaporator and coupled to an outlet of the centrifugal pump, for receiving pressure subcooled liquid refrigerant and cooled air from the evaporator to further subcool the liquid refrigerant to a temperature below its condensing temperature and to effect a partial reheating of the cooled flow of air thereby decreasing the relative humidity of the flow of the air. A reheater bypass conduit coupled between an inlet of the evaporator and the outlet of the pump. A bypass control valve positioned on the reheater bypass conduit for controlling the flow of liquid between the outlet of the pump and the inlet of the evaporator.

US Patent:

55092721, Apr 23, 1996

Filed:

Jul 18, 1994

Appl. No.:

8/276705

Inventors:

Robert E. Hyde - Portland OR

International Classification:

F25D 1704

US Classification:

621765

Abstract:

A reheater is used in air-conditioning system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed loop. A first conduit coupling a flow of liquid refrigerant through the expansion valve into the evaporator. A second conduit coupling the an outlet of the evaporator to an inlet of the compressor. A third conduit coupling an outlet of the compressor to an inlet of the condenser. A centrifugal pump is coupled to an outlet of the condenser for boosting a pressure of the condensed liquid refrigerant by an incremental pressure sufficient to pressure subcool the refrigerant. A reheater is positioned adjacent to the evaporator and coupled to an outlet of the centrifugal pump, for receiving pressure subcooled liquid refrigerant and cooled air from the evaporator to further subcool the liquid refrigerant to a temperature below its condensing temperature and to effect a partial reheating of the cooled flow of air thereby decreasing the relative humidity of the flow of the air. A reheater bypass conduit coupled between an inlet of the evaporator and the outlet of the pump. A bypass control valve positioned on the reheater bypass conduit for controlling the flow of liquid between the outlet of the pump and the inlet of the evaporator.

US Patent:

45998736, Jul 15, 1986

Filed:

Jan 31, 1984

Appl. No.:

6/575693

Inventors:

Robert E. Hyde - Portland OR

International Classification:

F25B 100

US Classification:

62498

Abstract:

A compression-type refrigeration system is disclosed, in which "flash gas" formation is eliminated without artificially maintaining condenser temperature and pressure levels. Condenser temperatures and pressures are allowed to fluctuate with ambient operating conditions, resulting in reduced compressor load and increased refrigeration capacity. After condensation, liquified refrigerant in the conduit between the receiver and the expansion valve is pressurized without adding heat by a centrifugal pump to a pressure sufficient to suppress flash gas in the conduit.

US Patent:

53297822, Jul 19, 1994

Filed:

Oct 12, 1993

Appl. No.:

8/136112

Inventors:

Robert E. Hyde - Portland OR

International Classification:

F25D 1706

US Classification:

62 90

Abstract:

A reheater is used in air-conditioning system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed loop. A first conduit coupling a flow of liquid refrigerant through the expansion valve into the evaporator. A second conduit coupling the an outlet of the evaporator to an inlet of the compressor. A third conduit coupling an outlet of the compressor to an inlet of the condenser. A centrifugal pump, coupled to an outlet of the condenser, for boosting a pressure of the condensed liquid refrigerant by an incremental pressure sufficient to pressure subcool the refrigerant. A reheater is positioned adjacent to the evaporator and coupled to an outlet of the centrifugal pump, for receiving pressure subcooled liquid refrigerant and cooled air from the evaporator to further subcool the liquid refrigerant to a temperature below its condensing temperature and to effect a partial reheating of the cooled flow of air thereby decreasing the relative humidity of the flow of the air.

US Patent:

53867009, Feb 7, 1995

Filed:

Mar 7, 1994

Appl. No.:

8/207287

Inventors:

Robert E. Hyde - Portland OR

International Classification:

F25B 4104

US Classification:

62224

Abstract:

Liquid pressure amplification with superheat suppression is used in an air-conditioning or refrigeration system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed refrigerant loop. A first conduit coupling an outlet of the compressor to an inlet to the condenser. A centrifugal pump is coupled to the condenser (or receiver) outlet for boosting the pressure of the condensed liquid refrigerant by a substantially constant increment. A second conduit transmits a first portion of the condensed liquid refrigerant from outlet of the pump through the expansion valve into the evaporator to effect cooling. A third conduit transmits a second portion of the condensed liquid refrigerant from the pump outlet into the condenser inlet, which cools the superheated vapor refrigerant entering the condenser, reducing head pressure.

US Patent:

61453323, Nov 14, 2000

Filed:

Jun 16, 1999

Appl. No.:

9/334073

Inventors:

Robert E. Hyde - Portland OR

Assignee:

DTE Energy Technologies, Inc. - Detroit MI

International Classification:

F25B 1700

US Classification:

62190

Abstract:

Apparatus for protecting a liquid refrigerant pump from damage due to cavitation and loss of lubrication by inclusion of means for detecting the presence of vaporized refrigerant at the pump inlet and deactivating the pump in response thereto.

US Patent:

52917444, Mar 8, 1994

Filed:

Sep 21, 1992

Appl. No.:

7/948300

Inventors:

Robert E. Hyde - Portland OR

International Classification:

F25B 900

US Classification:

62 86

Abstract:

Liquid pressure amplification with superheat suppression is used in an air-conditioning or refrigeration system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed refrigerant loop. A first conduit coupling an outlet of the compressor to an inlet to the condenser. A centrifugal pump is coupled to the condenser (or receiver) outlet for boosting the pressure of the condensed liquid refrigerant by a substantially constant increment. A second conduit transmits a first portion of the condensed liquid refrigerant from outlet of the pump through the expansion valve into the evaporator to effect cooling. A third conduit transmits a second portion of the condensed liquid refrigerant from the pump outlet into the condenser inlet, which cools the superheated vapor refrigerant entering the condenser, reducing head pressure.