| 摘要 |
A novel heat pump system capable of carrying out a cooling (refrigerating) operation or a heating (room heating) operation with ammonia and carbon dioxide, natural media, utilized in a combined state. The heat pump system (1) comprises a combination of an ammonia cycle (2), and a carbon dioxide cycle (3), and is characterized in that a carbon dioxide medium is circulated in the carbon dioxide cycle (3) by heating or cooling a part of the cycle, in addition to utilizing a natural circulation phenomenon in which a liquid head difference is formed in a carbon dioxide medium in the cycle without incorporating a compressor in the cycle, structural members of the ammonia cycle (2) being installed in a place isolated from a machine for cooling and heating an object material.
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