Symmetric refrigerant regulator for flooded multichannel evaporator

Abstract

A regulator of refrigerant for a refrigeration circuit with flooded evaporator. The refrigerant can be distributed to many separate evaporator channels. The flow of refrigerant can be changed so that the evaporator and condenser change functions. This provides the opportunity for a fast defrosting of the evaporator or the evaporator can alternately be applied for cooling and heating. The regulator functions independently of the gravitational field and therefore it can be applied for air-conditioning systems in aeroplane and space crafts. The regulator is without movable parts. It has two throttling steps, e.g. two capillary tubes separated by a suction-gas heat exchanger. It requires neither adjustment nor maintenance and therefore it can be placed at inaccessible places or it can be embedded completely in insulation foam.

1 . A refrigeration circuit comprising: a compressor, an evaporator, a condenser, a suction-gas heat exchanger, and a throttling means composed of a pressure -reducing nozzle connecting the bottom of said condenser to said suction-gas heat exchanger, and a pressure-reducing nozzle connecting said suction-gas heat exchanger to said evaporator, wherein the flow of refrigerant through said suction-gas heat exchanger is turbulent at the side of the condensate. 
     
     
         2 . A refrigeration circuit according to  claim 1  wherein the evaporator and/or the condenser are partitioned in several sections, and wherein each section is connected to the heat exchanger through a separate pressure-reducing nozzle. 
     
     
         3 . A refrigeration circuit according to  claim 1  further comprising a means (B) for changing the direction of the flow of refrigerant through the evaporator and condenser. 
     
     
         4 . A refrigeration circuit according to  claim 2  further comprising a means (B) for changing the direction of the flow of refrigerant through the evaporator and condenser.