Air supplementation ventilator of smoke exhaust ventilator

Abstract

The invention discloses an air supplementation ventilator of a smoke exhaust ventilator. The air supplementation ventilator of the smoke exhaust ventilator comprises a ventilator body and an electriccontrol box; the input end of the electric control box is connected with an external power source; the first output end of the electric control box is electrically connected with the ventilator body;the electric control box comprises a plug, a socket, an AC220V-DC24V power source module and an electric control unit; the input end of the AC220V-DC24V power source module is connected with the plug,and the output end of the AC220V-DC24V power source module is connected with the electric control unit; the electric control unit comprises a voltage transformation circuit, a current obtaining circuit, a comparison circuit and a control switch; the input end of the current obtaining circuit is connected with the socket, and the output end of the current obtaining circuit is connected with the input end of the comparison circuit; the output end of the comparison circuit is connected with the control switch; the control switch is a relay; and an output switch of the relay is connected with theventilator body. Synchronous on-off of the air supplementation ventilator of the smoke exhaust ventilator and the smoke exhaust ventilator is achieved in real sense, the smoke exhaust state and the non smoke exhaust state of the smoke exhaust ventilator can be recognized, and the situation of false operation of the ventilator when the smoke exhaust ventilator in the non smoke exhaust state is avoided.

Description

technical field [0001] The invention relates to a building ventilation device, in particular to a supplementary air ventilator for a range hood. Background technique [0002] The range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove. It can quickly suck away the waste burned by the stove and the harmful oil fume generated during the cooking process, and discharge it outside, reducing pollution and purifying the air. , Range hoods have become a standard configuration in modern kitchens. Because the kitchen will have oil fume problems during use, people generally close the doors and windows connecting the kitchen with other rooms or the living room when using the kitchen. If the kitchen is in a relatively closed space without air exchange with the outside world, when the range hood is working, the kitchen will be in a state of negative pressure. At this time, the sewer will have anti-odor, and the kitchen environment ...

AI Technical Summary

Problems solved by technology

Patent application number CN201220291442.2 discloses an automatic air supplement system for kitchen range hoods, which cannot distinguish whether the range hood is in the exhaust fume state or not, and cannot realize the true synchronization of the range hood and the air supplement

Images