The structure of an ice cream machine: The core components mainly consist of the ingredient tank and its refrigeration system, the freezing tank and its refrigeration system, the mixing scraper holder, the conveying device, and the control system.
The working principle of an ice cream machine: Its workflow is as follows: Ingredient tank - milk/air pump - freezing tank - scraper in the freezing tank - dispensing outlet.
Ingredient tank: Used to mix ice cream ingredients and temporarily store the resulting milk mixture. During operation, the refrigeration system is controlled by a thermistor to maintain the temperature of the ingredient tank between -0.5°C and 6.5°C.
Air/milk mixture pump: This is a key piece of equipment in the conveying system. It delivers the milk mixture to the freezing tank, and its operation is controlled by a pressure switch. Generally, air and liquid milk mixture enter the mixing zone simultaneously through their respective pathways, and then enter the freezing tank through the conveying pipes. In the refrigeration system of the raw material tank for storing milk slurry, the refrigerant is split into two paths at the dryer filter (m door). One path enters the evaporator of the raw material tank through the main capillary tube 10, and the other path enters the outer wall and inside the milk slurry delivery pipe through the auxiliary capillary tube 12, exchanging heat with the milk slurry and pre-cooling it before it enters the freezing tank, maintaining its temperature at around 4℃ to ensure product quality and food safety.
The inner surface of the freezing tank is its working surface. After the milk slurry and air are stirred and expanded, it is cooled upwards in the freezing tank to form a milkshake. After 7-11 minutes, when the product reaches the desired viscosity, it is scraped off by a spiral scraper and delivered to the dispensing outlet. The product can be dispensed by pulling down the dispensing handle. The standard temperature of the product is approximately -7 to -8℃.
Some ice cream machines have dual freezing tanks; generally, one or both tanks are operated depending on the needs.
The stirring scraper rack inside the freezing tank is driven by a stirring motor through a gearbox and a drive shaft. It is used to stir the milk slurry, so that the milk slurry is fully mixed with air. At the same time, the spiral scraper scrapes off the small ice crystals formed on the tank wall and pushes the milkshake formed towards the freezing door.
