Patent ID: 11931691
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B  A | IPC A  B

Claim 15:
16. The system of claim 5, wherein an indoor pressure control of the positive pressure chamber and the negative pressure chamber is performed by at least one method selected from a method, in which an indoor pressure is detected by each detection sensor installed indoors and transmitted to a control panel, so as to adjust a number of rotations (RPM) of the fan, which supplies, circulates and discharges air into the positive pressure chamber and the negative pressure chamber, according to a control circuit, which is programmed and inputted in advance, thereby adjusting an air volume to be supplied and discharged into the positive pressure chamber and the negative pressure chamber, or a method in which an opening rate of the air volume control damper installed in an air supply, discharge and circulation pipeline is adjusted or an operator checks an indicated value of a differential pressure gauge installed in the positive pressure chamber and the negative pressure chamber, so as to adjust an opening rate of the damper installed in the air supply, discharge and circulation pipeline, so that the control panel sounds an alarm when an indoor pressure is less than or more than a set value and automatically adjusts the number of rotations (RPM) of fans and an opening rate of the air volume control damper, thereby maintaining the indoor pressure within a set range.