| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control method of an air conditioner capable of returning cold water (or hot water) to a heat source machine while the temperature difference of the cold water (or hot water) is sufficiently secured, and thus, to achieve reduction in pump carrying power and improvement of efficiency-performance coefficient COP of the heat source machine. <P>SOLUTION: In the control method of the air conditioner, changing characteristics of a flow ratio and an air conditioning load factor of heat exchangers approximate to a linear function. The heat exchangers are constituted to form multiple stages, and by operating all the heat exchangers, the full load time flow rate of cold water (or hot water) of the heat exchangers during full load can be secured. By stopping the cold water (or hot water) made to flow in any one of the multistage heat exchangers accompanying reduction in the air conditioning load, the operation of the one heat exchanger is stopped. A control valve is controlled so that the flow rate of the operated heat exchangers other than the stopped heat exchanger becomes a state of the maximum flow ratio of these heat exchangers. After any one of the heat exchangers is stopped, the control is performed so that the indoor temperature becomes set temperature by increasing/reducing the flow rate of the operated heat exchangers. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
