A smoke exhaust system for public flue in a building and its control method

Abstract

A building public flue fume exhaust system comprises range hoods which are installed on different floors. An air outlet of each range hood communicates with a public flue through a corresponding fume pipe of the range hood. The building public flue fume exhaust system is characterized in that an air suction device which can outwards suck the gas in the flue is installed at the bottom of the public flue. The building public flue fume exhaust system further comprises a control system which can correspondingly control the air suction device according to the value of the starting ratio. The building public flue fume exhaust system has the advantages that the building public flue fume exhaust system can exhaust cooking fumes on the lower layers through the air suction device at the bottom of the flue, the pressure of the bottom of the flue is reduced, and therefore the fume exhaust capacity and the fume exhaust efficiency of the flue are improved, the problems that in the cooking peak time period, the fume exhaust operation of users on the lower layers is not smooth, the fumes return, and the odors spread are solved, and the usage experience of the users is improved. In addition, the control system can correspondingly control the working gear of the air suction device according to the value of the starting ratio, and therefore the intelligent control over the fume exhaust system is achieved, and the system can save more energy.

Description

technical field [0001] The invention relates to a public flue for a building, in particular to a smoke exhaust system for a public flue for a building and a control method thereof. Background technique [0002] At present, there are more and more high-rise residential buildings, and most of the high-rise smoke exhaust uses public flues to exhaust the smoke. The outlets of high-rise public flues are generally set on the top of the floor, and the power provided by the range hood is limited, resulting in unsatisfactory smoke exhaust effects. During peak cooking hours, low-floor oil fumes cannot be exhausted, and even oil fumes in the flue may flow backward. At present, in order to solve the problem of poor smoke exhaust of existing range hoods, people have proposed the concept of "central purification system", which generates power through the main fan placed at the top of the public flue, and cooperates with the range hood fan on the user side to Improve smoke exhaust effect....

AI Technical Summary

Problems solved by technology

However, grease particles are easy to accumulate on the blades of the main fan on the roof, which not only damages the dynamic balance of the fan, resulting in increased noise and vibration, but also requires regular cleaning and maintenance, which is troublesome to maintain

Moreover, the main fan is set on the common exhaust channel, which will increase the exhaust resistance of the system

Especially when the number of floors is greater than 35, the negative pressure generated by the main fan on the top floor cannot be effectively transmitted, and pressure leakage occurs, which has almost zero impact on the smoke exhaust of low-rise users, which instead causes energy waste

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