| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of explosionproof when air is mixed into a freezing cycle owing to bad welding. etc., in the freezing cycle such as a refrigerator and an air conditioner, and the life where hydrocarbon is used as a refrigerant. SOLUTION: In a freezing cycle comprised of a compressor 1, a condenser 2, an expansion mechanism 3, and an evaporator 4, there are provided an oxygen adsorbent 7 comprising reducing iron or activated carbon, a case 8 for containing the oxygen adsorbent 7, and a transparent plate 9 for transmitting oxygen in the freezing cycle and partitioning the oxygen adsorbent 7 and the freezing cycle. Hereby, when air is mixed into the freezing cycle owing to bad welding and the like, oxygen concentration with respect to hydrocarbon in the compressor 1 is prevented from reaching an explosion region, and even when any spark is produced at a stator (not shown) of an electric motor in the compressor 1, fire is prevented from being induced and exploded on the hydrocarbon, whereby there is ensured a freezing cycle having high reliability against explosionproof.
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