| 摘要 |
<p>In order to eliminate the need for a fan / for fans without reducing the effectiveness of the heat transfer effect upon a product (18), in particular upon a food product, a method for reducing a temperature of the product (18) as well as a corresponding freezer (10) are proposed, comprising:
- a housing (12) having a sidewall (40, 42) defining a chamber (15) in the housing (12), and an inlet (20) and an outlet (22) in communication with the chamber (15); and
- a pair of pistons (44, 52) operatively associated with the housing (12) and in communication with the chamber (15), the pair of pistons (44, 52) operable out of phase with each other for oscillating a gas flow (16) within the chamber (15) to contact the product (18).</p> |
