DEFROSTING STRUCTURE OF OUTDOOR MACHINE OF AIR-CONDITIONER

PROBLEM TO BE SOLVED: To provide an outdoor machine to reliably remove icing of an outdoor heat-exchanger generated during heating operation. SOLUTION: A refrigerating cycle comprises an indoor heat-exchanger arranged in an indoor machine frame body; an outputdoor heat-exchanger 2, a compressor, and a four-way valve arranged in an outdoor machine frame body B', and a capillary layer attached to a refrigerant piping between an indoor heat exchanger and an outdoor heat-exchanger 2. An air pass flow passage 8 is formed between a bottom plate 7 of an outdoor machine frame body B and the outdoor heat-exchanger 2 without approaching therebetween and a shield plate 9 to open and close the air pass flow passage is arragned in a position except a place right below the outdoor heat-exchanger 2. The shield plate 9 closes the air pass flow passage 8 during ordinary operation, and opens the air pass flow passage 8 during the shield plate 9, opens the air pass flow passage 8 during defrosting operation, and causes the passage of defrosting air through the air pass flow passage 8 during defrosting operation to effect manual defrosting.