Ejector, ejector production method, and method for setting diffuser outlet flow path
AssigneeTLV Co., Ltd.
InventorFumihiro Kawashima
Life of this patent
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Abstract
An ejector includes a nozzle, a suction chamber, and a diffuser. A diffuser further includes an attachment configured to change the dimensions of the outlet flow path. The attachment changes the length X of a narrowed flow path and the length Y and the inner diameter D of a parallel flow path such that expressions (1) and (2) are satisfied: X=A×D (1), and Y=B×D (2).
Claims2
An ejector system comprising:
- a nozzle configured to eject first fluid;
- a suction chamber configured to house the nozzle and to suck second fluid by negative pressure generated by ejection of the first fluid from the nozzle;
- a diffuser including an outlet flow path and configured to mix and discharge the first fluid and the second fluid of the suction chamber;
- and
- a plurality of replaceable attachments configured to be used in the diffuser, wherein
- the outlet flow path includes a narrowed flow path having a sectional area narrowed toward downstream, a parallel flow path connected to a downstream end of the narrowed flow path and having a constant sectional area, and an expanded flow path connected to a downstream end of the parallel flow path and having a sectional area expanded toward downstream,
- each replaceable attachment is configured to change a dimension of the outlet flow path and includes at least part of the narrowed flow path, the parallel flow path, and at least part of the expanded flow path,
- replacement of one of the replaceable attachments changes a dimension of the outlet flow path,
- one attachment is selected from the plurality of replaceable attachments for use in the diffuser, the plurality of replaceable attachments including at least a first attachment and a second attachment,
- the first attachment has an inner diameter d1 and a length y1 of the parallel flow path,
- the narrowed flow path of the diffuser to which the first attachment is attached has a length x1,
- the second attachment has an inner diameter d2 and a length y2 of the parallel flow path,
- the narrowed flow path of the diffuser to which the second attachment is attached has a length x2,
- x1/d1 is substantially equal to x2/d2, and
- y1/d1 is substantially equal to y2/d2, where
- x1 is different from x2, y1 is different from y2, and d1 is different from d2.
A method for manufacturing an ejector including a nozzle configured to eject first fluid, a suction chamber configured to house the nozzle and to suck second fluid by negative pressure generated by ejection of the first fluid from the nozzle, a diffuser including an outlet flow path having a narrowed flow path having a sectional area narrowed toward downstream, and a plurality of replaceable attachments configured to be used in the diffuser, a parallel flow path connected to a downstream end of the narrowed flow path and having a constant sectional area, and an expanded flow path connected to a downstream end of the parallel flow path and having a sectional area expanded toward downstream and configured to mix and discharge the first fluid and the second fluid of the suction chamber, comprising:
- a setting step of setting a dimension of the outlet flow path;
- and
- a preparation step of preparing the diffuser having the dimension of the outlet flow path set at the setting step by replacement of one of the plurality of replaceable attachments, wherein
- at the preparation step, the one replaceable attachment is selected from the plurality of replaceable attachments, the plurality of replaceable attachments including at least a first attachment and a second attachment according to the dimension of the outlet flow path set at the setting step,
- each replaceable attachment includes at least part of the narrowed flow path, the parallel flow path, and at least part of the expanded flow path,
- the first attachment has an inner diameter d1 and a length y1 of the parallel flow path,
- the narrowed flow path of the diffuser to which the first attachment is attached has a length x1,
- the second attachment has an inner diameter d2 and a length y2 of the parallel flow path,
- the narrowed flow path of the diffuser to which the second attachment is attached has a length x2,
- x1/d1 is substantially equal to x2/d2, and
- y1/d1 is substantially equal to y2/d2, where
- x1 is different from x2, y1 is different from y2, and d1 is different from d2.
Dependencies are inferred from the claim text.