| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a secondary refrigerant circulation type air conditioning system and a control method for it, avoiding the occurrence of cavitation in a refrigerant pump. <P>SOLUTION: The capability operation amount is not suddenly increased, but increased by stages by providing a control threshold K as shown in Fig.5(b), so that the supercooling degreeΔTs is always kept to a value larger than the threshold K. Thus, the refrigerant temperature Tr is always below the saturation temperature Ts, so that the refrigerant is kept in the liquid phase state on a line p-h in the refrigerant pump to avoid cavitation. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
