| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling system which is more safe even in unwonted refrigerant leakage capable of substantially reducing a refrigerant amount necessary for efficiently operating a refrigerating cycle. SOLUTION: A compressor, a condenser, a first pressure reducing mechanism, a second pressure reducing mechanism, and an evaporator are annularly connected in sequence, and an inflammable refrigerant is sealed. In a structure of the second pressure reducing mechanism, a pressure reducing means and a two-way valve are connected in parallel. The first pressure reducing mechanism is directly connected to the condenser. By opening the two-way valve during high load, since a degree of superheat of a compressor sucked refrigerant does not rise, insufficiency of refrigerated capacity due to reduction of a refrigerant circulating amount can be prevented, and increase of a refrigerant sealed amount becomes unnecessary. In such a structure, since there is no liquid pipe holding a great deal of liquid refrigerant during operation of the compressor, the refrigerant sealed amount can be reduced, and safety in unwonted refrigerant leakage can be enhanced. COPYRIGHT: (C)2004,JPO
|
