| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent freezing of water within hot water piping supplying hot water to a hot water heat exchanger during ventilation operation and suppress increase in running cost and decline in ventilation capacity. <P>SOLUTION: This desiccant air conditioner includes: a moisture absorbing body 13 provided astride an air suction passage 7 and an air exhaust passage 8 and heated to desorb moisture; and the hot water heat exchanger 16 provided at the upstream of the moisture absorbing body 13 in the air suction passage 7 and heating air made to flow in the air suction passage 7. The desiccant air conditioner further includes: a communication passage 23 communicating the upstream side of the hot water heat exchanger 16 in the air suction passage 7 with an indoor side; and an on-off valve 24 opening/closing the communication passage 23. The desiccant air conditioner further includes a controller 22 closing the on-off valve 24 when the temperature of air supplied to the hot water heat exchanger 16 by an air suction unit 9 is higher than a predetermined temperature and opening the on-off valve 24 when the temperature of the air is the predetermined temperature or lower, during the ventilation operation for discharging indoor air to an outdoor side by an air exhaust unit 10 and supplying outdoor air to the indoor side by the air suction unit 9 while heating by the hot water heat exchanger 16 is stopped. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
