How to choose and install and maintain the kitchen exhaust fan

The kitchen is a heavy oil fume area, the kitchen is full of various methods of frying, frying, boiling, steaming, roasting, frying, etc., resulting in high temperature, humidity, and polluted gases. When it is accumulated to a certain extent, the kitchen will no longer be a cooking one. Large space, but a vessel that pollutes the gas. Therefore, the kitchen needs to use a fan to remove the polluted gas from the kitchen through the exhaust pipe. So the following small series shows you how to choose the right fan and install some of my points.

What is a kitchen exhaust fan

The exhaust fan is a machine that quickly removes odors, high temperatures, and soot gas generated during the processing of food in the kitchen.

Fan selection:

First, according to the size of the kitchen space and the layout of the exhaust hood, select the air volume required by the fan

The calculation method is as follows:

1, the overall amount of air, according to the kitchen space, ventilation 40-60 times per hour.

For example, the kitchen has a total area of ​​160 square meters and a height of 3 meters. The required ventilation is 160X3X60=28800m3/h.

2, according to the windward side of the kitchen exhaust hood (the length of the exhaust hood minus the length of the wall), the wind speed per second is about 0.5 meters.

For example, the kitchen exhaust hood has a circumference of 25 meters, and the length of the wall is 10 meters. The required ventilation is 3600X (25-10)X0.5= 27000m3/h.

Second: Calculate the static pressure required by the fan according to the condition of the pipeline:

1. Determine the cross-sectional area of ​​the duct according to the air volume and wind speed (wind speed of 10-15 m/s). The width and height ratio of the duct should preferably not exceed 2:1 (to save material and reduce wind resistance).

2. Calculate the wind resistance (ie the static pressure required by the fan) according to the wind speed, cross-sectional area of ​​the air duct, elbow, and variable diameter.

Three: According to the calculated air volume, static pressure. Choose the right fan.

Installation and maintenance points:

First, the kitchen fan is an indispensable key equipment in the kitchen. It is recommended that it should not be installed in the ceiling or installed in a machine room, roof or exterior wall for easy maintenance.

Second, the kitchen fan works in high temperature, humidity and soot gas for a long time. Regular maintenance is an indispensable job.
Fault point:

1. The impeller is stained with oil, which causes the blade to be curved and angularly deformed. The air pressure full pressure parameter drops significantly and does not meet the smoke exhausting requirements.

2. The oil impregnated on the impeller causes the impeller to lose balance, increase vibration, and damage the bearing.

3. Parts in the harsh environment are prone to rust and damage the fan.

The relevant contents of the above kitchen exhaust fan will be introduced to this first, I hope to help you, more information, j in GO Jiaju

Source: GO Jiaju

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