Inventor

LIFSON ALEXANDER

US173 patents

⚠️ This page may combine multiple inventors who share the name “LIFSON ALEXANDER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LIFSON ALEXANDER

CARRIER CORP

Method and apparatus for the control of economizer circuit flow for optimum performance

Pulsed flow for capacity control

Hybrid tandem compressor system with multiple evaporators and economizer circuit

Monitoring refrigerant charge

Hybrid reheat system with performance enhancement

Refrigerant cycle with operating range extension

Refrigeration system employing multiple economizer circuits

Injection of liquid and vapor refrigerant through economizer ports

Compressor control at voltage and frequency extremes of power supply

Control of scroll compressor at shutdown to prevent unpowered reverse rotation

Scroll compressor with unloader valve between economizer and suction

Heat pump with reheat and economizer functions

Refrigerant system with common economizer and liquid-suction heat exchanger

Refrigerant systems with reheat and economizer

Compressor degradation detection system

Steady state operation of a refrigeration system to achieve optimum capacity

Method of optimizing cooling capacity, energy efficiency and reliability of a refrigeration system during temperature pull down

Indoor air quality improvement by re-evaporation control

Refrigerant vapor compression system operating at or near zero load

Method and control for preventing flooded starts in a heat pump

Variable speed compressor motor control for low speed operation

Heat pump with reheat and economizer functions

Multiple condenser reheat system with tandem compressors

Diagnosing a loss of refrigerant charge in a refrigerant system

Hybrid tandem compressor system with economizer circuit and reheat function for multi-level cooling

Multi-circuit dehumidification heat pump system

Short reverse rotation of compressor at startup

Refrigerant heat pump with reheat circuit

Heat pump with reheat circuit

Utilization of bypass refrigerant to provide reheat and dehumidification function in refrigerant system

Prevention of compressor unpowered reverse rotation in heat pump units

Multi-circuit refrigerant cycle with dehumidification improvements

Refrigerant system with vapor injection and liquid injection through separate passages

Valve for preventing unpowered reverse run at shutdown

Flash tank for heat pump in heating and cooling modes of operation

Hybrid dehumidication system

Refrigerant subcooling by condensate

Refrigerant system with controlled refrigerant charge amount

Dual economizer heat exchangers for heat pump

LIFSON ALEXANDER

Economized refrigerant vapor compression system for water heating

Economized refrigeration cycle with expander

Refrigerant system with expansion device bypass

Refrigerant system with multi-speed scroll compressor and economizer circuit

TARAS MICHAEL F

Parallel flow heat exchanger for heat pump applications

Refrigerant system with variable speed compressor and reheat function

Refrigerant system with variable speed drive

SCROLL TECH

Refrigerant system with multi-speed scroll compressor and economizer circuit

Scroll compressor with vapor injection and unloader port

Indentation to optimize vapor injection through ports extending through scroll wrap

HALLIBURTON CO

Acoustic attenuator, well logging apparatus and method of well logging