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

A flue system, flow distribution technology

Active Publication Date: 2020-05-26
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] Such as figure 1 As shown, the flow distribution control method of this embodiment can measure different gears s in advance, and the relationship between flow Q and flow Q at different speeds n can be fitted into a function formula Q(s,n)=A s +B s n+C s no 2 +D s no 3 , you can also directly enter the second gear speed n1 corresponding to the flow rate Q1, n2 corresponding to the flow rate Q2, etc. into the table, and then when the actual second gear is running at n5, you can use the Newton difference or Lagrangian difference and other difference functions Calculate the actual flow Q5 at this time, and then use the intersection point of the resistance curve and the PQ curve to estimate the flow after the gear is adjusted, or directly adjust the gear according to the ratio of the target flow to the current flow.

[0050] Such as ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20E04F17/02
CPCE04F17/02F24C15/2021
Inventor 何立博
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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