1.Long term non cleaning can lead to a decrease in smoke exhaust effectiveness,and toxic fumes cannot escape,resulting in an increase in dispersion rate and a greater harm to human health.
　　2.If a household range hood is used for more than three months,it will produce a large amount of oil pollution,which will stick to the impeller,flue,etc.By increasing the weight of the impeller,the starting point flow rate of the motor is also increased,resulting in a natural increase in power consumption.At the same time,it may also increase noise,causing further harm to people and the environment.
　　3.After the oxidation of oil pollution,acidic substances are produced,which can corrode the range hood and cause rusting.Long term accumulation may also lead to fires,and the accumulation of air holes in the range hood increases the degree of pollution,leading to an increase in the incidence of lung cancer.