Ventilation system

Abstract

In a ventilation system, a nozzle unit includes at least two nozzles. The at least two nozzles each include a housing having a hollow elongated shape extending in alignment with a first direction. The at least two nozzles are arranged side by side in alignment with a second direction intersecting the first direction. A ventilation device is arranged above the nozzle unit and is configured to blow air from a first end toward a second end of the nozzle unit in the first direction. A control device is configured to control the ventilation device. The housing of each of the at least two nozzles has a lower surface having a ventilation port extending in alignment with the first direction. The ventilation port is configured to allow air sent into the housing to be blown out of the housing through the ventilation port.

1 . A ventilation system comprising:
 a nozzle unit including at least two nozzles, the at least two nozzles each including a housing having a hollow elongated shape extending in alignment with a first direction, the at least two nozzles being arranged side by side in alignment with a second direction intersecting the first direction;   a ventilation device arranged above the nozzle unit and configured to blow air from a first end toward a second end of the nozzle unit in the first direction to generate an airflow flowing above the nozzle unit; and   a control device configured to control the ventilation device,   the housing of each of the at least two nozzles having a lower surface having a ventilation port extending in alignment with the first direction,   The ventilation port is configured to allow air sent into the housing to be blown out of the housing through the ventilation port.   
     
     
         2 . The ventilation system of  claim 1 , wherein
 the control device is configured to adjust a ventilation amount of the ventilation device.   
     
     
         3 . The ventilation system of  claim 1 , wherein
 the control device is configured to periodically increase and reduce a ventilation amount of the ventilation device.   
     
     
         4 . The ventilation system of  claim 1 , wherein
 the ventilation device is a first ventilation device,   the ventilation system further includes a second ventilation device, the second ventilation device being arranged above the nozzle unit and being configured to blow air from the second end toward the first end in the first direction, and   the control device is configured to control the first ventilation device and the second ventilation device.   
     
     
         5 . The ventilation system of  claim 4 , wherein
 the control device is configured to alternately switch between an operation period of the first ventilation device and an operation period of the second ventilation device.   
     
     
         6 . The ventilation system of  claim 5 , wherein
 the control device is configured to provide, between the operation period of the first ventilation device and the operation period of the second ventilation device, a complete deactivation period during which both the first ventilation device and the second ventilation device are stopped.   
     
     
         7 . The ventilation system of  claim 4 , wherein
 the control device is configured to adjust a ventilation amount of each of the first ventilation device and the second ventilation device.   
     
     
         8 . The ventilation system of  claim 7 , wherein
 the control device is configured to
 increase the ventilation amount of the first ventilation device from zero to a first target value and then reduce the ventilation amount to zero during the operation period of the first ventilation device and 
 increase the ventilation amount of the second ventilation device from zero to a second target value and then reduce the ventilation amount to zero during the operation period of the second ventilation device.