Machine for making liquid or semi-liquid food products and method of operating the machine

A machine for making liquid or semi-liquid food products comprising:

• a frame;
• a first container containing a liquid or semi-liquid base product;
• a second container defining a processing chamber for processing a base mixture made up of the liquid or semi-liquid base product and a gas;
• a stirrer mounted inside the second container;
• thermal treatment means associated with the second container, acting in conjunction with the stirrer to convert the base mixture inside the second container into a finished liquid or semi-liquid product;
• a connecting duct connecting the first container to the second container and configured to connect the first container to the second container in such a way as to allow the base mixture to be transferred to the second container;
• a dispenser connected to the second container to allow dispensing the finished product;
• the machine being characterized in that it further comprises:
• at least one regulating device for regulating the supply of base mixture to the second container to regulate the supply pressure or flow rate of one between, or both, the liquid or semi-liquid base product and the gas supplied through the duct;
• a control and drive unit connected to the regulating device to drive the regulating device.