Topic 7 Mechanical Ventilation

Question 1

How does baffle grease filter work

Answer 1

1. Grease laden air is forced through several changes in direction as it passes through the filter.
2. The grease droplets are unable to change direction as quickly as air and is separated from the air
3. It is deposited on filter blades and drained into drip trays
4. Grease collected is periodically cleaned

Question 2

How does electrostatic filter works

Answer 2

1. Dust particles in the air is positively charged after passing the ionizing screen
2. Positively charged dust particles are attracted to the negatively charged plates
3. Cleaner air passes through
4. The dust collected on the plates are periodically removed by washing with hot water jets