PUMP FOR MIXTURE OF LIQUID AND GAS, CONTROL DEVICE, AND DEVICE FOR MANUFACTURING FROZEN CONFECTION

摘要

A pump (10) for a mixture of liquid and gas, the pump (10) introducing therein the liquid and the gas and discharging the introduced liquid and gas.  The pump (10) comprises: a cylinder (31) provided with a mixing chamber (37) having connected thereto a liquid introducing path (38) for introducing the liquid into the mixing chamber, a gas introducing path (39) for introducing the gas into the mixing chamber, and a discharge path (40) for discharging the introduced liquid and gas; a piston (21) slidably fitted in the cylinder (31) and reciprocating between the upper end (34) and the lower end (35) in the cylinder (31) to increase and decrease the volume of the mixing chamber (37); a stepping motor (11) for driving the piston (21); and a conversion means for converting  rotational motion of the output shaft of the stepping motor (11) into reciprocating motion of the piston (21).  The cylinder (31), the piston (21), the stepping motor (11), and the conversion means are integrated together.  Thus, the small-sized pump for a mixture of liquid and gas, a control device, and a device for manufacturing a frozen confection are provided.