Ejectors and methods of manufacture
AssigneeCarrier Corporation
InventorsSteven A. Lozyniak, Alexander Lifson, Zuojun Shi, Parmesh Verma, Kenneth E. Cresswell, J. Michael Griffin, Thomas D. Radcliff
Life of this patent
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Abstract
An ejector has: a motive flow inlet; a secondary flow inlet; an outlet; a motive nozzle; a diffuser; and a control needle shiftable between a first position and a second position. The ejector comprises: an inlet body bearing the motive flow inlet and the secondary flow inlet; a diffuser body forming the diffuser and bearing the outlet; a motive nozzle insert forming the motive nozzle in a compartment in the inlet body; and a needle guide insert in the motive nozzle insert.
Claims20
An ejector comprising:
- a motive flow inlet;
- a secondary flow inlet;
- an outlet;
- a motive nozzle;
- a diffuser;
- and
- a control needle shiftable between a first position and a second position,
- wherein the ejector comprises:
- an inlet body bearing the motive flow inlet and the secondary flow inlet;
- a diffuser body separately formed from the inlet body and forming the diffuser and bearing the outlet;
- a motive nozzle insert separately formed from the inlet body and diffuser body and forming the motive nozzle in a compartment in the inlet body;
- and
- a needle guide insert in the motive nozzle insert, the needle guide insert having a central bore for passing and guiding the needle and a plurality of off center bores for passing motive flow with a motive flow path sequentially defined:
- through the motive flow inlet;
- through the motive nozzle insert including through the off-center bores;
- and
- merging with a secondary flow flowpath.
An ejector comprising:
- a motive flow inlet;
- a secondary flow inlet;
- an outlet;
- a motive nozzle;
- and
- a diffuser,
- wherein the ejector comprises:
- an inlet body bearing the motive flow inlet and the secondary flow inlet;
- a diffuser body forming the diffuser and bearing the outlet;
- a metallic motive nozzle insert being a separate piece from the inlet body and forming the motive nozzle in a compartment in the inlet body, said compartment having a downstream-facing surface abutting an upstream facing surface of the motive nozzle insert, an upstream end of the motive nozzle insert being within the compartment;
- a control needle shiftable between a first position and a second position;
- and
- a needle guide insert in the motive nozzle insert, the needle guide insert having a central bore for passing and guiding the needle and a plurality of off-center bores for passing motive flow with a motive flow path sequentially defined:
- through the motive flow inlet;
- through the motive nozzle insert including through the off-center bores;
- and
- merging with a secondary flow flowpath.
A method for manufacturing an ejector, the ejector comprising:
- a motive flow inlet;
- a secondary flow inlet;
- an outlet;
- a motive nozzle;
- a diffuser;
- an inlet body bearing the motive flow inlet and the secondary flow inlet;
- a diffuser body forming the diffuser and bearing the outlet;
- a motive nozzle insert forming the motive nozzle in a compartment in the inlet body;
- a control needle shiftable between a first position and a second position;
- and
- a needle guide insert in the motive nozzle insert, wherein a motive flow flowpath extends sequentially from the motive flow inlet, into the motive nozzle insert, through the needle guide insert, and out the motive nozzle,
- the method comprising:
- inserting the needle guide insert into the motive nozzle insert;
- inserting the motive nozzle insert into the compartment from an opening in a downstream end of the inlet body;
- and
- mating the diffuser body to the downstream end of the inlet body.
Dependencies are inferred from the claim text.