| 摘要 |
<p>A typical cabinet freezer (1) displays products for sale on several shelves (2) above a chest container (3). Air circulated by a fan (6) up a concealed passage (4), containing the evaporator (5), falls down the front of the shelves as a cold air curtain. To prevent migration of water vapour from the ambient atmosphere into the curtain, and the consequent frost build-up, a separate air supply, with humidity lying between 0 and 2g/kg, is provided from an overhead outlet (8), to fall on either side of the cabinet. Additionally, air supplied (7) to the circulating fan (6) is itself of similar quality. Applications to various single and multiple freezer installations, including provision for recirculating the dehumidified air, are described. curtain. To prevent</p> |
