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A flow distribution control method for the central flue system of a high-rise building

A flue system and flow distribution technology, which can be used in heating methods, oil fume removal, vertical pipes, etc., and can solve problems such as high energy consumption, low efficiency and energy saving

Active Publication Date: 2021-08-20
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A flow distribution control method for the central flue system of a high-rise building
  • A flow distribution control method for the central flue system of a high-rise building
  • A flow distribution control method for the central flue system of a 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 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 actual flow.

[0050] Such as ...

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Abstract

A flow distribution control method for the central flue system of a high-rise building. The central flue system includes indoor units installed on different floors. The air outlets of each indoor unit are connected to the public flue through their own smoke pipes. The target flow QL is within the target range [Qx, Qd], the advantage of the present invention is that: the flow distribution control method of the high-rise building does not need sensors such as power or current, pressure, flow velocity, etc., and only needs to be able to feed back the current gear and speed. The speed of the current gear is detected or the back electromotive force is used to calculate the speed, and then use the one-to-one correspondence between the speed and the flow in the same gear to calculate the current actual flow, calculate the difference from the target flow, and choose to adjust at least one gear to calculate whether it can be controlled To the flow range, the whole control method can realize the basic guarantee of effective air volume and eliminate the difference in smoke exhaust effect of different floors, and through the frequency conversion or gear shift control of the indoor range hood, the control process is more efficient, energy-saving, and less loss.

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 Patents(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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