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22
2021-01
A fan (usually a negative pressure fan) installed on one wall of the space extracts some of the indoor air, causing the indoor air pressure to momentarily be less than atmospheric pressure or less than normal pressure. At this time, an air inlet is opened on the other side of the space (often opposite the negative pressure fan), and outside air automatically enters the space under atmospheric pressure. Therefore, a directional and stable airflow is formed in the space. This type of ventilation is usually called negative pressure ventilation. Its characteristics are directional and stable airflow, and it is connected to the outside world rather than internal circulation within the space.
2021-01-22
22
2021-01
Why does negative pressure occur in residential buildings?
Because the design of buildings didn't consider ventilation, current buildings have centralized water supply and drainage, and centralized smoke exhaust. Every household has a range hood and bathroom exhaust fan as standard equipment, and their power is increasing. Currently, the power of range hoods from brands such as Boss and Fotile reaches 1000Pa, with Meida's under-range hoods even higher. As the airtightness of doors and windows improves, the indoor-outdoor isolation also gets better. Therefore, when doors and windows are closed (especially in the spring, autumn, and winter in the north and summer in the south), negative pressure is immediately generated when the range hood is turned on.
2021-01-22
22
2021-01
The Ministry of Civil Affairs has officially announced that nearly 1,500 people die from gas poisoning and other accidental deaths in China each year. This is especially true in families that use gas stoves for heating, where the risk increases significantly during bathing. Poor ventilation and excessively high concentrations of carbon monoxide are the primary causes of asphyxiation deaths due to gas leaks.
2021-01-22
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Address: No.885 Dujuan Road,Jngyue Economc Development Zone,Changchun City,Jilin Provnce,P.R.China
Telephone：+86 400-697-9917
Telephone：+86 13578948190
E-mail：188531271@qq.com
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