Flow distribution control method of central flue system of high-rise building

Abstract

The invention discloses a flow distribution control method of a central flue system of a high-rise building. The central flue system comprises indoor units installed on different floors, an air outletof each indoor unit communicates with a common flue through a respective smoke pipe, and a target flow QL is preset to be within a target range [Qx, Qd]. The flow distribution control method of the central flue system of the high-rise building has the advantages that ensors such as power, current, pressure, flow speed and the like are not needed, only the current gear and the current rotating speed need to be fed back, the current gear and rotating speed detection or back electromotive force is utilized for calculating the rotating speed, then the one-to-one correspondence relationship between the rotating speed and the flow under the same gear is utilized for calculating the current actual flow, the difference between the current actual flow and the target flow is calculated, at least one gear is selected to be adjusted, and whether the flow can be controlled in a flow range is calculated. The whole control method can realize the basic guarantee of effective air quantity, eliminate the difference of smoke exhaust effects of different floors, and through the frequency conversion or gear shift control of an indoor range hood, the control process is efficient and saves energy, and loss is low.

Description

technical field [0001] The invention relates to a central flue system, in particular to a flow distribution control method for the central flue system of a high-rise building. Background technique [0002] At present, the floors of newly-built buildings in cities are generally higher and higher, and are mainly decorated with engineering. Most high-rise residences use indoor range hoods, smoke pipes, check valves and public flues to connect, so that the cooking fumes in the kitchen can pass through the indoor exhaust pipes. The power range hood is discharged into the public flue through the smoke pipe. Since the outlet of the high-rise public flue is generally set at the top, the switch of the range hood at the user's home will affect the system outlet resistance. The increase in the distance of the flue will increase the loss along the way, and the exhaust of the range hood upstairs will cause the smoke exhaust resistance downstairs. The increase makes the pressure distribu...

AI Technical Summary

Problems solved by technology

It can be seen that this kind of control method achieves balanced flow adjustment by increasing the resistance at the outlet, and the energy consumption is relatively large, which is not efficient enough and energy-saving.

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