| 摘要 |
<p>A refrigerant system utilizes environmentally friendly natural refrigerant such as carbon dioxide. A pressure relief mechanism such as pressure relief valve is incorporated into the refrigerant system design to allow for at least some amount of refrigerant to be released to atmosphere to provide safe operation or comply with agency regulations if pressure within the refrigerant system exceeds a certain limit. This release can occur during refrigerant system storage, transportation or operation. A detection device such as an electrical circuit is included into the refrigerant system design to provide an indication that pressure relief valve has opened, such that the determination can be made by a refrigerant system control or an operator whether the refrigerant system needs to be recharged and whether it can continue its normal operation, narrow its operational envelope or shut down until the refrigerant charge can be restored.</p> |
