Refrigeration circuit

Patent · Mon Jan 05 23:00:00 EST 1987

OSTI ID:6950737

Sato, M

This patent describes a refrigerant circuit including a compressor, a condenser, a first expansion means and an evaporator so that discharging refrigerant from a compressor passes through the condenser, the first expansion means and the evaporator, respectively, and returns to a first suction port of the compressor. The improvement described here comprises: a second expansion means connecting the condenser and the first expansion means so that the outlet port of the second expansion means is connected to the inlet port of the first expansion means; and a pressure sensitive regulating valve fixed between an inlet port of the second expansion means and an outlet port of the second expansion means so that the valve is responsive to a pressure differential between the inlet and outlet ports whereby the valve opens progressively wider as the pressure differential increases. The outlet port of the valve is connected to a second suction port of the compressor so that the valve controls the quantity of refrigerant passing from the second expansion means to the second suction port of the compressor according to the pressure differential between the inlet and outlet ports of the second expansion means. The pressure differential and thus the quantity of refrigerant and larger when the compressor is engaged and thereafter diminish so that the torque produced when the compressor is engaged is reduced while steady-state flow through the circuit is quickly attached.

• Assignee: Sanden Corp.
• Patent Number(s): US 4633674
• OSTI ID: 6950737
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
COMPRESSORS
CONDENSERS
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
EVAPORATORS
EXPANSION
FLOW REGULATORS
FLUID FLOW
FLUIDS
OPERATION
PRESSURE DEPENDENCE
REFRIGERANTS
REFRIGERATORS
STEADY FLOW
TORQUE
VALVES
WORKING FLUIDS