Direct Expansion Evaporator

摘要

A direct expansion evaporator includes a feeding channel having a feeding end and a dispensing end for raw material feeding therethrough, and a heat exchange channel thermally communicating with the feeding channel for guiding refrigerant passing through the heat exchange channel to heat-exchange with the raw material to form a frozen product. The heat exchange channel has a pre-cooling portion and a freezing portion, wherein the heat exchange channel is configured to ensure a traveling time of the refrigerant at the pre-cooling portion to be longer than a traveling time of the refrigerant at the freezing portion. The raw material is guided to flow from the pre-cooling portion to the freezing portion so as to initially pre-cool the raw material and to substantially freeze the raw material to form the frozen product before the frozen product is dispensed at the dispensing end of the feeding channel.

主权项

1. A direct expansion evaporator for making frozen product from raw material, comprising:
a feeding channel having a feeding end and a dispensing end for the raw material feeding through said feeding channel; and a heat exchange channel thermally communicating with said feeding channel for guiding refrigerant passing through said heat exchange channel to heat-exchange with the raw material within said feeding channel to form the frozen product, wherein said heat exchange channel has a pre-cooling portion formed toward said feeding end of said feeding channel and a freezing portion formed toward said dispensing end, wherein said heat exchange channel is configured to ensure a traveling time of the refrigerant at said pre-cooling portion of said heat exchange channel to be longer than a traveling time of the refrigerant at said freezing portion of said heat exchange channel.