Economizer used in chiller system
AssigneeDaikin Applied Americas Inc.
InventorsJoseph Knopp, Naomasa Miki, Paul Johnson
Life of this patent
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Abstract
An economizer includes a separation wheel, a motor, and a liquid storage portion. The separation wheel is arranged and configured to separate refrigerant into gas refrigerant and liquid refrigerant. The separation wheel is attached to a shaft rotatable about a rotation axis. The motor is arranged and configured to rotate the shaft in order to rotate the separation wheel. The liquid storage portion is arranged and configured to store the liquid refrigerant. The economizer is adapted to be used in a chiller system including a compressor, an evaporator and a condenser.
Claims14
An economizer adapted to be used in a chiller system including a compressor having a compressor motor, an evaporator and a condenser, the economizer comprising:
- a separation wheel arranged and configured to separate refrigerant into gas refrigerant and liquid refrigerant, the separation wheel being attached to a shaft rotatable about a rotation axis;
- an economizer motor arranged and configured to rotate the shaft in order to rotate the separation wheel;
- a liquid storage portion arranged and configured to store the liquid refrigerant;
- a variable frequency drive arranged and configured to control the economizer motor in order to adjust a rotational speed of the separation wheel;
- and
- a controller programmed to control the variable frequency drive,
- the economizer being connected to an intermediate stage of the compressor such that the refrigerant is injected into the intermediate stage of the compressor, and
- the controller being further programmed to control the variable frequency drive such that the economizer achieves a target intermediate pressure of the compressor.
Dependencies are inferred from the claim text.