| 摘要 |
<p>A refrigerant overcharge prevention system is applied to a refrigerant charging apparatus (28) which has a refrigerant supply source (29, 71, 72) and a refrigerant supply pipe (34a, 34b) connected to a refrigerant circuit (21) of a cooling apparatus. The charging apparatus (28) charges refrigerant into the refrigerant circuit (21) while activating a compressor (22) provided in the refrigerant circuit (21). The system comprises a refrigerant flow suppressing mechanism (36a, 36b, 61, 62) provided in the refrigerant supply pipe (34a, 34b) for preventing an excessive flow of refrigerant being charged, a refrigerant charge determining sensor (37, 51) provided in a high-pressure side path of the refrigerant circuit (21) for determining whether the amount of charged refrigerant reaches a desired level by sensing a change of the state of refrigerant present in the refrigerant circuit (21), and a compressor deactivating circuit for deactivating the compressor (22) in response to the determination of the refrigerant charge determining sensor (37, 51). The refrigerant charge rate is appropriately suppressed by the refrigerant flow suppressing mechanism (36a, 36b, 61, 62) to prevent generation of an excessive amount of bubbles of refrigerant in the refrigerant circuit (21). Completion of a proper refrigerant charge can be precisely and easily detected by the refrigerant charge determining sensor (37, 51).</p> |
