Fine bubble generating nozzle

A fine bubble generating nozzle comprising:

• a nozzle unit;
• and
• a baffle,
• wherein the nozzle unit comprises:
• an inlet into which a gas-dissolved pressurized water in which a gas is dissolved flows;
• a pressure decreasing portion configured to decrease a pressure of the gas-dissolved pressurized water introduced from the inlet;
• a first collision chamber disposed downstream of the pressure decreasing portion and including a first collision wall with which the gas-dissolved pressurized water introduced from the pressure decreasing portion collides so that a flow direction of the gas-dissolved pressurized water changes;
• a second collision chamber disposed downstream of the first collision chamber and including a second collision wall with which the gas-dissolved pressurized water having flowed through the first collision chamber collides so that the flow direction of the gas-dissolved pressurized water changes;
• and
• an outlet from which the gas-dissolved pressurized water having flowed through the second collision chamber flows out,
• wherein the baffle is disposed outside of the nozzle unit and is disposed at a position facing the outlet
• wherein the baffle is constituted of an elastic material,
• wherein the nozzle unit comprises an attaching portion to which the baffle is attached, and
• when the baffle is attached to the attaching portion, there is a space between the attaching portion and the baffle,
• in a second direction extending along a central axis of the nozzle unit,
• the first collision wall is disposed on a first side than the pressure decreasing portion,
• the outlet is disposed between the first collision wall and the second collision wall, and
• the second collision wall is disposed on a second side opposite the first side than the first collision wall,
• wherein the nozzle unit further comprises a peripheral wall extending from an outer end of the first collision wall toward the second side of the second direction and defining a flow path between the first collision chamber and the second collision chamber,
• wherein the attaching portion protrudes outward from the peripheral wall, and
• when the baffle is attached to the attaching portion, a first side end of the baffle is disposed on the second side than the first collision wall.

A fine bubble generating nozzle comprising:

• a nozzle unit;
• and
• a baffle,
• wherein the nozzle unit comprises:
• an inlet into which a gas-dissolved pressurized water in which a gas is dissolved flows;
• a pressure decreasing portion configured to decrease a pressure of the gas-dissolved pressurized water introduced from the inlet;
• a first collision chamber disposed downstream of the pressure decreasing portion and including a first collision wall with which the gas-dissolved pressurized water introduced from the pressure decreasing portion collides so that a flow direction of the gas-dissolved pressurized water changes;
• a second collision chamber disposed downstream of the first collision chamber and including a second collision wall with which the gas-dissolved pressurized water having flowed through the first collision chamber collides so that the flow direction of the gas-dissolved pressurized water changes;
• and
• an outlet from which the gas-dissolved pressurized water having flowed through the second collision chamber flows out,
• wherein the baffle is disposed outside of the nozzle unit and is disposed at a position facing the outlet,
• wherein the baffle entirely covers the outlet when the fine bubble generating nozzle is seen from the baffle along a first direction extending along a flow path axis, the flow path axis being an axis of a flow path connecting the second collision wall and the outlet,
• wherein in a second direction extending along a central axis of the nozzle unit,
• the first collision wall is disposed on a first side than the pressure decreasing portion,
• the second collision wall is disposed on a second side opposite the first side than the first collision wall,
• the outlet is disposed between the first collision wall and the second collision wall, and
• the baffle is disposed between the first collision wall and the outlet,
• wherein the baffle is constituted of an elastic material,
• wherein the nozzle unit comprises an attaching portion to which the baffle is attached, and
• when the baffle is attached to the attaching portion, there is a space between the attaching portion and the baffle,
• wherein the nozzle unit further comprises a peripheral wall extending from an outer end of the first collision wall toward the second side of the second direction and defining a flow path between the first collision chamber and the second collision chamber,
• wherein the attaching portion protrudes outward from the peripheral wall, and
• when the baffle is attached to the attaching portion, a first side end of the baffle is disposed on the second side than the first collision wall.