Smoke prevention monitoring method and smoke prevention monitoring system

Abstract

The invention relates to a monitoring method for preventing smoke falling and a monitoring system for preventing falling smoke. In the case of no back pressure, a static pressure air volume relationship list at the outlet of a smoke exhaust pipe is constructed, and the current outlet pressure value is used according to the current flow direction of the air flow in the smoke exhaust pipe. Make corrections to obtain the corresponding corrected air volume value and the wind speed value corresponding to each gear of the range hood; according to the oil fume flow rate value in the exhaust pipe and the preset airflow velocity threshold, obtain the smoke pouring speed value in the exhaust pipe; When the wind speed value corresponding to each gear of the range hood has a value greater than the smoke pouring speed value, adjust the gear position of the range hood to the gear corresponding to the wind speed value so that the airflow blown by the range hood The direction of the smoke is reversed and blown out into the public flue. This invention does not need to set up a special anti-falling smoke structure, which avoids the occurrence of loose sealing in the exhaust pipe due to mechanical failures, oily dirt adhesion and other factors caused by the traditional anti-falling smoke structure due to long-term work, and effectively improves the anti-falling smoke structure. Effect.

Description

technical field [0001] The invention relates to the field of range hoods, in particular to a monitoring method for preventing falling smoke and a monitoring system for preventing falling smoke. Background technique [0002] As people pay more attention to the quality of life at home and their health, range hoods have become an essential device in people's kitchens, and especially users in residential buildings pay more attention to the range hood's range hood effect. [0003] When the range hood is installed in the kitchen of the user in the residential building, the flue outlet of the range hood needs to communicate with the public flue of the residential building, and the flue outlet of the range hood is usually provided with a one-way opening and closing device such as Smoke-proof mechanical structures such as air outlet hoods or check valves are used to prevent oily fumes in the public flue from flowing back into the user's kitchen through the above-mentioned smoke-proof...

AI Technical Summary

Problems solved by technology

However, after all, the anti-falling smoke structure is applied to the range hood in the kitchen. If the temperature in the kitchen is too high or the water tank leaks, the amount of sealing water used to seal the gap will be reduced, and it will be difficult to seal the above-mentioned shielding part and the tank. gap between sinks

Even if a scale is added outside the water tank to observe the liquid in the water tank, it is easy to accumulate oil stains on the scale, which is ultimately not conducive to the user's clear and accurate observation of the scale and the timing of injecting sealing water; if the water level sensor is used to realize automatic The way of water injection not only requires the water level sensor to have high sensitivity, but also needs to open holes in the water tank, which increases the processing complexity of the range hood

Moreover, with the increase of the working time of the anti-falling smoke structure of the invention patent CN201310703970.3, the gap between the shielding part and the water tank may also change, resulting in that the original sealing water level value can no longer meet the sealing of the gap after the change. Purpose

Images