Ejector, ejector production method, and method for setting outlet flow path of diffuser
AssigneeTLV Co., Ltd.
InventorsFumihiro KAWASHIMA, Tomonori ITOGA
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Abstract
An ejector includes a nozzle, a suction chamber, and a diffuser. An outlet flow path includes a narrowed flow path having a first tapered surface narrowed toward downstream, a parallel flow path having a constant sectional area, and a parallel flow path having a second tapered surface expanded toward downstream. The diffuser further includes an attachment configured to change the dimensions of the outlet flow path. The attachment changes the dimensions of the outlet flow path such that the ratio of the tapered angle of the first tapered surface to the tapered angle of the second tapered surface is higher as the sectional area, i.e., the inner diameter, of the parallel flow path is smaller.
Claims7
An ejector 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;
- and
- a diffuser including an outlet flow path and configured to mix and discharge the first fluid and the second fluid of the suction chamber,
- wherein the outlet flow path includes a narrowed flow path having a first tapered surface 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 second tapered surface expanded toward downstream,
- the diffuser further includes a changing unit configured to change a dimension of the outlet flow path, and
- the changing unit changes the dimension of the outlet flow path such that a ratio of a tapered angle of the first tapered surface to a tapered angle of the second tapered surface is higher as the sectional area of the parallel flow path is smaller.
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, and a diffuser including an outlet flow path having a narrowed flow path having a first tapered surface 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 second tapered surface 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,
- wherein at the setting step, the dimension of the outlet flow path is set such that a ratio of a tapered angle of the first tapered surface to a tapered angle of the second tapered surface is higher as the sectional area of the parallel flow path is smaller.
A method for setting an outlet flow path of a diffuser including an outlet flow path having a narrowed flow path having a first tapered surface 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 second tapered surface expanded toward downstream and used for an ejector, comprising:
- a step of setting a sectional area of the parallel flow path;
- and
- a step of setting a dimension of the outlet flow path such that a ratio of a tapered angle of the first tapered surface to a tapered angle of the second tapered surface is higher as the sectional area of the parallel flow path is smaller.
Dependencies are inferred from the claim text.