Refrigerating device for preparing frozen drink

A refrigerating device used to prepare a frozen drink, comprising;

• a pre-refrigeration unit used to pre-refrigerating a raw material for preparing the frozen drink in the pre-refrigeration unit;
• a main-refrigeration unit in communication with the pre-refrigeration unit and used to accommodate the raw material after pre-refrigeration, wherein the pre-refrigerated raw material is refrigerated further in the main-refrigeration unit;
• a dispenser in communication with the main-refrigeration unit and used to dispense the frozen drink in the main-refrigeration unit;
• and
• a refrigeration system providing a refrigerating capacity to the pre-refrigeration unit and the main-refrigeration unit so as to pre-refrigerate the raw material in the pre-refrigeration unit and further refrigerate the pre-refrigerated raw material in the main-refrigeration unit to form the frozen drink,
• wherein the raw material is configured to be one of water, a dry power ingredient, a solution ingredient, a mixer of water and a dry power ingredient and a mixer of water and a solution ingredient, the pre-refrigeration unit comprises a water pre-refrigeration chamber and a preservation chamber used to storage the dry power ingredient and/or the solution ingredient, the main-refrigeration unit comprises a main-refrigeration chamber, and the water pre-refrigeration chamber and the preservation chamber are in communication with the main-refrigeration chamber via a pipe;
• the refrigeration system provides the refrigerating capacity to the water pre-refrigeration chamber, the preservation chamber and the main-refrigeration chamber respectively so as to pre-refrigerate the water in the water pre-refrigeration chamber, pre-refrigerate the dry power ingredient and/or the solution ingredient in the preservation chamber, and further refrigerate the pre-refrigerated water as well as the dry power ingredient and/or the solution ingredient in the main-refrigeration chamber;
• the refrigeration system comprises a compressor, a condenser, a throttling element, a first evaporator used to provide a refrigerating capacity to the water pre-refrigeration chamber, a second evaporator used to provide a refrigerating capacity to the main-refrigeration chamber and a third evaporator used to provide a refrigerating capacity to the preservation chamber;
• a first regulating valve is disposed between the throttling element and the first evaporator, a second regulating valve is disposed between the throttling element and the second evaporator, and a third regulating valve is disposed between the throttling element and the third evaporator;
• and
• the throttling element is configured as one of an electronic expansion valve, a thermostatic expansion valve or a capillary tube.