There are mainly two kinds of pollution sources in the kitchen: kitchen fire sources such as gas and liquefied gas, which may release harmful gases such as carbon monoxide and nitrogen oxides when burning; Cooking dishes will produce lampblack, and food will produce harmful substances when heated at high temperature.

Kitchen oil fume has strong irritation to nasal, eye and throat mucosa, which can cause respiratory diseases such as rhinitis, pharyngitis and tracheitis. A study by Peking University Public Health College surveyed 496 subjects and found that there may be a connection between kitchen smoke and asthma. Moreover, research shows that long-term exposure to cooking smoke may increase the risk of lung cancer by 1 to 2 times. Women who have been exposed to lampblack for a long time are more prone to aging and long spots, so people will become ugly if they cook for a long time.

When heated to 151℃, acrolein with strong irritation will be produced, which will damage the mucosa of nose, eyes and throat. When the oil is heated above 211℃, there are many harmful substances in the oil fume. However, the traditional cooking methods in China, such as frying, frying, frying, etc., have an oil temperature above 261℃, which is unhealthy. The oil temperature should be controlled to avoid high temperature cooking. Be careful not to reuse cooking oil and avoid further frying the fried oil. Try to use some heat-resistant oil when cooking, such as refined olive oil and mustard oil, and coconut oil can be used when cooking, resulting in less soot.

every kitchen has a range hood, but its use is not completely correct. The distance between the range hood and the kitchen should be more than 71cm. Don't turn off the range hood immediately after frying. The range hood should run continuously for about ten minutes to ensure that harmful gases are completely discharged. When cooking, you should also turn on the range hood. In addition to discharging cooking fumes, the range hood can also eliminate gas pollution (every time it is ignited, it will leak when it is turned off, and gas will also produce waste gas when it burns). In addition, the range hood should be cleaned regularly. Under the condition of daily use, the filter screen should be cleaned every half month or 1 month, otherwise the oil filtering effect will be affected.