Swirling flow producing apparatus, method of producing swirling flow, vapor phase generating apparatus, microbubble generating apparatus, fluid mixed and fluid injection nozzle

Abstract

There are provided a fluid injection nozzle, a fluid mixer, a microbubble generating apparatus, a vapor phase generating apparatus, a method of producing swirling flow, and a swirling flow producing apparatus that can be applied to any kind of fluid and can efficiently generate a swirling flow at high speed. The swirling flow producing apparatus includes a housing and a cylindrical member. The housing includes a cylindrical portion of which at least one end is opened, and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion. The cylindrical member is provided in the cylindrical portion of the housing. The cylindrical member includes a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed in a peripheral wall of the cylindrical portion. A fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, and flows out from the housing and the cylindrical member.

1 . A swirling flow producing apparatus comprising:
 a housing including a cylindrical portion of which at least one end is opened and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion; and   a cylindrical member that is provided in the cylindrical portion of the housing, the cylindrical member including a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed at a peripheral wall of the cylindrical portion,   wherein a fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, and flows out from the housing and the cylindrical member.   
     
     
         2 . The swirling flow producing apparatus according to  claim 1 ,
 wherein if both ends of the cylindrical portion of the housing are opened, the fluid introducing passage is provided in the middle of the cylindrical portion in an axial direction and the holes are formed symmetrically with respect to the middle of the cylindrical portion of the cylindrical member in an axial direction at both ends.   
     
     
         3 . The swirling flow producing apparatus according to  claim 1 ,
 wherein if only one end of the cylindrical portion of the housing is opened, the holes are provided to be shifted at the opened end in the axial direction of the cylindrical portion.   
     
     
         4 . The swirling flow producing apparatus according to  claim 1 ,
 wherein the cylindrical member includes a plurality of holes.   
     
     
         5 . The swirling flow producing apparatus according to  claim 1 ,
 wherein the direction of the hole of the cylindrical member is shifted from an axis of the cylindrical member.   
     
     
         6 . The swirling flow producing apparatus according to  claim 1 ,
 wherein the direction of each of the holes of the cylindrical member is inclined toward the opening direction of the housing.   
     
     
         7 . The swirling flow producing apparatus according to  claim 1 ,
 wherein the holes of the cylindrical member include a plurality of holes having different sizes.   
     
     
         8 . The swirling flow producing apparatus according to  claim 1 ,
 wherein the opening position of the fluid introducing passage, which is formed at the cylindrical portion of the housing, corresponds to the opening position of the hole that is formed on an outer peripheral surface of the cylindrical member.   
     
     
         9 . The swirling flow producing apparatus according to  claim 1 ,
 wherein a throttle portion is formed at least at one of the fluid introducing passage and each of the holes.   
     
     
         10 . The swirling flow producing apparatus according to  claim 1 ,
 wherein the cylindrical member is replaceable.   
     
     
         11 . A method of producing swirling flow using a swirling flow producing apparatus that include a housing and a cylindrical member, the housing including a cylindrical portion of which at least one end is opened and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion, the cylindrical member being provided in the cylindrical portion of the housing and including a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened and holes formed at a peripheral wall of the cylindrical portion, the method of producing swirling flow comprising:
 introducing a fluid from the fluid introducing passage; and   generating a swirling flow by making the fluid flow into the cylindrical portion of the cylindrical member through the holes.   
     
     
         12 . A vapor phase generating apparatus comprising:
 a housing including a cylindrical portion of which at least one end is opened, and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion; and   a cylindrical member that is provided in the cylindrical portion of the housing, the cylindrical member including a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed at a peripheral wall of the cylindrical portion,   wherein a fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes, and flows out from the housing and the cylindrical member while generating a swirling flow, so that a vapor phase is generated at a central portion of the swirling flow.   
     
     
         13 . A microbubble generating apparatus comprising:
 a housing including a cylindrical portion of which at least one end is opened, and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion; and   a cylindrical member that is provided in the cylindrical portion of the housing, the cylindrical member including a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed at a peripheral wall of the cylindrical portion,   wherein a fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, and flows out from the housing and the cylindrical member while generating a vapor phase at a central portion of the swirling flow, so that microbubbles are generated in the fluid.   
     
     
         14 . A fluid mixer comprising:
 a housing including a cylindrical portion of which at least one end is opened, and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion; and   a cylindrical member that is provided in the cylindrical portion of the housing, the cylindrical member including a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed at a peripheral wall of the cylindrical portion,   wherein a fluid, which is introduced from the fluid introducing passage and contains a material to be mixed, flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, and flows out from the housing and the cylindrical member, so that the fluid and the material to be mixed are agitated and mixed with each other.   
     
     
         15 . A fluid mixer comprising:
 a housing including a cylindrical portion of which one end is opened, a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion, and a passage for introducing a material to be mixed that is formed at the other end of the cylindrical portion; and   a cylindrical member that is provided in the cylindrical portion of the housing, the cylindrical member including a cylindrical portion of which both ends are opened, and holes formed at a peripheral wall of the cylindrical portion,   wherein a fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, a material to be mixed is introduced into the cylindrical portion of the cylindrical member through the passage for introducing a material to be mixed, and the fluid and the material to be mixed flow out from the housing and the cylindrical member while being agitated and mixed with each other.   
     
     
         16 . A fluid injection nozzle comprising:
 a housing including a cylindrical portion of which at least one end is opened, and a fluid introducing passage that is opened on an inner peripheral surface of the cylindrical portion; and   a cylindrical member that is provided in the cylindrical portion of the housing, the cylindrical member including a cylindrical portion of which at least one end in a direction corresponding to an opening direction of the cylindrical portion is opened, and holes formed in a peripheral wall of the cylindrical portion,   wherein a fluid introduced from the fluid introducing passage flows into the cylindrical portion of the cylindrical member through the holes so as to generate a swirling flow, and flows out from the housing and the cylindrical member.