Bubble generator

A bubble generator comprising:

• a container including a side wall and a top wall defining a cavity having a volumetric dimension at an initial pressure;
• an insert located within the cavity defining a gas path with a trap portion, the gas path being in communication with an exit in the container;
• said insert having a diameter equal to or less than the horizontal plane of the container;
• the cavity including an opening receiving a gas accumulating within the cavity, said cavity capable of receiving said accumulating gas and the gas expanding to a predetermined volume proximate to a trap exit level,
• the gas accumulating within the cavity and displacing a liquid internal to the cavity,
• the gas path of the trap allowing the accumulating gas to escape through the exit once the accumulating gas reaches said predetermined level proximate the trap portion,
• wherein said cavity returning to said initial liquid volume and pressure once the accumulating gas escapes,
• wherein a liquid path merges with the gas path at an acute angle between the trap portion and the exit
• wherein the sum of the cross-sectional area of the liquid path and the cross-sectional area of the gas path at the point of merger of the gas path and the liquid path is equal to or smaller than a cross sectional area of the exit.