Parallel expansion valve system for energy efficient air conditioning system

Patent · Tue Aug 19 04:00:00 EDT 1986

OSTI ID:5286472

Latshaw, D L; Sillato, S C

An improved air conditioning system is described of the type having a refrigerant which sequentially flows through variable speed compressor means responsive to varying outdoor air temperature for attenuating refrigerant mass flow corresponding to lower outdoor temperature and which compresses vaporous refrigerant supplied by evaporator means, condenser means which is in heat exchange relationship with outdoor air for condensing refrigerant circulated from the condenser means, expansion means which expands the liquid refrigerant from the condenser means, and evaporator means which is in direct or indirect heat exchange relationship with air in a confined space for maintaining the confined space air at a desired set point of temperature and/or humidity. The evaporator supplies the refrigerant to the compressor means, the improvement which comprises the expansion means comprising two refrigerant expansion valve means which are connected in parallel by a refrigerant line from the condenser means and which passes the refrigerant to the evaporator means. The secondary valve means are of greater capacity than the primary valve means. The primary refrigerant expansion valve means has its equalizing line connected to the refrigerant line exiting the evaporator.

• Assignee: Liebert Corp., Columbus, OH
• Patent Number(s): US 4606198
• OSTI ID: 5286472
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
AIR CONDITIONERS
COMPRESSORS
CONTROL EQUIPMENT
EFFICIENCY
ENERGY EFFICIENCY
ENERGY TRANSFER
EQUIPMENT
EVAPORATORS
EXPANSION
FLOW REGULATORS
FLUIDS
HEAT TRANSFER
HUMIDITY
MASS TRANSFER
PRESSURE DROP
REFRIGERANTS
TEMPERATURE EFFECTS
VALVES
WORKING FLUIDS