Economizer control with variable capacity
AssigneeCarrier Corporation
InventorPeter P. Narreau
Life of this patent
Estimating the term…
Abstract
A refrigeration circuit is provided in which economizer control is provided together with variable capacity control. Constant cooling is achieved by controlling an economizer cycle responsive to the suction pressure of the compressor. Additionally, compressor discharge temperature is controlled by controlling the portion of liquid refrigerant supplied to the interstage line.
Claims8
A refrigeration circuit for providing economizer control comprising:
- said refrigeration circuit including a continuous fluid path serially including compressor means, discharge line means, condenser means, liquid line means passing through an economizer means, expansion means, evaporator means, and suction line means containing pressure sensing means;
- means for supplying refrigerant to said economizer means in a heat transfer relationship with said liquid line passing through said economizer means;
- and
- means for controlling said means for supplying refrigerant to said economizer means responsive to said pressure sensing means whereby the temperature of refrigerant in said liquid line means is controlled.
A method for providing economizer control in a refrigeration circuit including a continuous fluid path serially including compressor means, discharge line means, condenser means, liquid line means passing through economizer means, expansion means, evaporator means and suction line means comprising the steps of:
- supplying refrigerant to said economizer means in a heat transfer relationship with said liquid line passing through said economizer means;
- sensing the pressure in said suction line means;
- and
- controlling the supplying of refrigerant to said economizer means responsive to the pressure sensed in said suction line.
Dependencies are inferred from the claim text.