MULTIPLE EVAPORATOR CONTROL USING PWM VALVE/COMPRESSOR

摘要

A refrigeration system including a condenser; a (single) linear compressor that is activated and deactivated by a pulse width modulation switching device; a pulse width modulation refrigerant flow switch; at least two evaporators operably connected in parallel with one another with at least one evaporator associated with the refrigerator compartment that operates at a first refrigerant fluid pressure and with at least one other evaporator associated with the freezer compartment that operates at a second refrigerant fluid pressure; and a plurality of refrigerant fluid conduits operably connecting the condenser, the linear compressor and the evaporators into a refrigerant fluid flow circuit and such that the evaporators are capable of running simultaneously at different pressure levels and refrigerant flows from the evaporators, to the pulse width modulation refrigerant flow switch and through the pulse width modulation refrigerant flow switch.

主权项

1. An air conditioning system comprising:
a compressor having an outlet and an inlet, a condenser operably coupled to the compressor outlet and configured to receive refrigerant fluid from the compressor; a plurality of evaporators each operating and coupled in parallel to the condenser and each having an inlet pressure side and an outlet pressure side and each receiving refrigerant fluid from the condenser via the inlet pressure side and each outputting refrigerant fluid at different evaporator outlet pressures; refrigerant fluid conduits operably coupling the compressor, the condenser and the plurality of evaporators thereby forming a refrigerant fluid circuit for transmission of the refrigerant fluid between the compressor, the condenser, and the plurality of evaporators; and a switch valve operably coupled to the outlet pressure side of each of the plurality of evaporators using the refrigerant fluid conduits, wherein the switch valve is configured to switch between any one evaporator of the plurality of evaporators such that the switch valve provides an inlet pressure of refrigerant fluid to the compressor at a pressure between a highest evaporator outlet pressure and a lowest evaporator outlet pressure of the different outlet pressures of the plurality of evaporators.