| 摘要 |
PROBLEM TO BE SOLVED: To reduce required refrigerating capacity by reducing entrainment of outer air in air curtain. SOLUTION: An air flow blow out opening 7 of a circulation ventilation passage 3 opening at a front surface upper part of a goods storage chamber is divided into three flow passages of a center main flow passage 15, a front and a rear accessory flow passages 16, 17. Opening surfaces 16a, 17a of the accessory flow passages 16, 17 are put perpendicular to an opening surface 15a of the main flow passage 15 with facing each other, and flow speed of air flow blown out of the accessory flow passages 16, 17 is made higher than that out of the main flow passage 15. Swirl 13 to be generated right after blowing out is suppressed and generation of large scale swirl 13a is inhibited to reduce entrainment of outer air into the air curtain by blowing accessory flow 21 from the accessory flow passages 16, 17 of higher speed than main flow 20 to the main flow 20 blowing out of the min flow passage 15 in vicinity of the opening surface 15a. COPYRIGHT: (C)2005,JPO&NCIPI
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