| 摘要 |
PURPOSE:To quickly cool a storage chamber and to reduce temperature range of the air in the chamber by providing a partition plate for dividing chilled gas supply space into inner and outer passages and blocking the lower end of the inner passage, and a passage switching unit for selectively guiding chilled gas to the inner and outer passages disposed at the upper end of the plate. CONSTITUTION:A partition plate 30 divides a chilled gas supply space 11B in a chilled gas circulating space 11 into inner and outer passages (called 'inside passage 31 and outside passage 32'), blocks the lower end of the passage 31, and guides the chilled gas guided to the passage 31 all to a storage chamber 10 side. A passage switching unit 33 for selectively guiding the chilled gas to one or both of the passages 31, 32 is disposed at the upper end side (i.e., air inlet side) of the plate 30 to switch the flow of the chilled gas in the space 11B. The unit is operated to selectively guide the chilled gas flowing in a cold air circulating space to one or both of the passages 31, 32 to selectively switch direct and indirect coolings for concurrently cooling directly and indirectly the chamber. |
