| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum heat exchanger capable of positively preventing hydrogen generation, and not needing inspection of a film applied to an aluminum heat exchanger surface. SOLUTION: In an adsorber for an adsorption type freezer, a film preventing permeation of moisture such as an SiO<SB>2</SB>film, or an anodic oxide coating film is formed on surfaces of the aluminum heat exchangers 120 and 130 arranged in a casing 110, and several to hundred and several tens parts per million negative ions such as PO<SB>4</SB><SP>3-</SP>, or SiO<SB>3</SB><SP>2-</SP>are added to a refrigerant (water) sealed in the casing. COPYRIGHT: (C)2005,JPO&NCIPI
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