Pulsed flow for capacity control
AssigneeCarrier Corporation
InventorAlexander Lifson
Life of this patent
Estimating the term…
Abstract
Step control in capacity modulation of a refrigeration or air conditioning circuit is achieved by rapidly cycling a solenoid valve in the suction line, economizer circuit or in a bypass with the percent of "open" time for the valve regulating the rate of flow therethrough. A common port in the compressor is used for economizer flow and for bypass.
Claims3
In a system serially including a compressor, a discharge line, a condenser, an expansion device, an evaporator and a suction line, means for achieving capacity control comprising:
- a solenoid valve in said suction line;
- means for rapidly pulsing said solenoid valve whereby the rate of flow in said suction line to said compressor is modulated;
- a fluid path extending from a point intermediate said condenser and said expansion device to said compressor at a location corresponding to an intermediate point of compression in said compressor;
- a bypass line connected to said fluid path and said suction line;
- a solenoid valve in said bypass line;
- means for rapidly pulsing said solenoid valve in said bypass line whereby the rate of flow of bypass to said suction line is modulated.
In a system serially including a compressor, a discharge line, a condenser, an expansion device, an evaporator and a suction line, means for achieving capacity control comprising:
- a solenoid valve in said suction line;
- means for rapidly pulsing said solenoid valve whereby the rate of flow in said suction line to said compressor is modulated;
- a fluid path extending from a point intermediate said condenser and said expansion device to said compressor at a location corresponding to an intermediate point of compression in said compressor;
- an economizer circuit connected to said fluid path;
- a solenoid valve in said economizer circuit;
- and
- means for rapidly pulsing said solenoid valve in said economizer circuit whereby the rate of economizer flow to said compressor is modulated.
Dependencies are inferred from the claim text.