Method and apparatus for refrigerant recovery

Patent · Tue Aug 17 04:00:00 EDT 1993

OSTI ID:6251563

Sevrain, C J; Lambert, B C

An apparatus is described for recovering refrigerant from a system, the apparatus comprising: a vane pump, the vane pump including a central hub having a plurality of blades extending therefrom, the hub and blades being mounted for rotary motion in a chamber defined by a housing, the vane pump including an inlet and an outlet; a motor, the motor being coupled to the hub of the vane pump for imparting rotary motion thereto; a conduit coupling the inlet of the vane pump to the system; a phase sensor positioned to determine the phase of the refrigerant passing from the system to the pump, the sensor producing an output signal corresponding thereto; and pump control means coupled to the sensor and serving to change the capacity of the pump depending on whether the sensor senses the refrigerant is in gas or liquid phase.

• Assignee: Micropump Corp., Vancouver, WA (United States)
• Patent Number(s): A; US 5235821
• Application Number: PPN: US 7-999606
• OSTI ID: 6251563
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CONTROL
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
FLUIDS
GASES
LIQUIDS
MACHINERY
MANAGEMENT
MATERIALS RECOVERY
MEASURING INSTRUMENTS
MONITORS
MOTORS
OPERATION
POLLUTION CONTROL
PROCESSING
PUMPS
REFRIGERANTS
REFRIGERATING MACHINERY
WASTE MANAGEMENT
WASTE PROCESSING
WORKING FLUIDS