Venturi nozzle apparatus

A venturi nozzle apparatus which mixes water and a gas to dissolve the gas in the water, the venturi nozzle apparatus comprising:

• a housing in which a flow pipe, through which at least one of the water and the water in which the gas is dissolved selectively flows, and a bypass pipe, which communicates with the flow pipe to selectively bypass at least one of the water and the water in which the gas is dissolved flowing through the flow pipe, are disposed;
• an injector unit which is detachably inserted into the flow pipe of the housing and configured to selectively receive the gas and the water to dissolve the gas in the water;
• a valve member which is inserted into the bypass pipe of the housing and configured to cause at least one of the water and the water in which the gas is dissolved to flow to at least one of the flow pipe of the housing and the bypass pipe of the housing, wherein the flow pipe includes:
• a supply end portion which is open to allow the water to be selectively supplied;
• a discharge end portion which is disposed at a position opposite to the supply end portion and which is open to allow the water in which the gas is dissolved to be discharged;
• and
• a flow pipe side flow path portion which is provided between the supply end portion and the discharge end portion and through which at least one of the water and the water in which the gas is dissolved selectively flows, wherein the injector unit is inserted through the supply end portion of the flow pipe;
• and
• a stopper member which is selectively inserted into the housing to prevent the injector unit from being detached through the supply end portion of the flow pipe,
• wherein the stopper member is in direct contact with an end of the injector unit,
• wherein an end portion of the stopper member is within the flow pipe side flow path portion of the flow pipe,
• wherein the bypass pipe includes:
• an insertion end portion to which the valve member is inserted;
• a closed end portion which is disposed at a position opposite to the insertion end portion;
• and
• a bypass pipe side flow path portion which is provided between the insertion end portion and the closed end portion and through which at least one of the water and the water in which the gas is dissolved selectively flows,
• wherein the supply end portion of the flow pipe and the insertion end portion of the bypass pipe are formed in a front end portion of the housing.