Our insect control measures are carried out by using our ventilation equipment technology to prevent insects from entering from outside by controlling the pressure of the controlled rooms.
These measures have been adopted in such factories as paper mills and food factories, and they play a role in improving product quality.
Insects enter rooms because they are attracted to certain odors and temperatures.
In cases where the flow rate of supply air and exhaust air is unbalanced or in cases where the air supply occurs naturally through the outer walls’ vents, the room pressure can become lower than the outside, and a large amount of air flows through the outside entrance or through the building’s crevices. Entering the room together with this air are insects, which may lead to contamination of products.
Insects instinctively interpret any detection of wind as a sign they are being attacked and respond by flying downwind. It is therefore necessary to calculate airflow to ensure that the flow of air always travels in the direction from the building to outside and design a method of providing rooms with pressure higher than outside (positive pressure room).
By creating positive pressure inside the factory, we ensure the airflow direction is always going to the outside, thereby preventing insects from flying in and breaching the room.
Below we show with illustrations some examples of the kinds of systems we have actually installed.
Insect control ventilation equipment construction was carried out on the first floor and part of the second floor of the existing paper mill.
Air conditioning systems and blowers were used to feed outside air through ducts to the controlled room in order to create a positive pressure environment. The system measures the pressure, and excess air is exhausted to the outside using fine-control differential pressure damper.
* A steam coil is built into the air conditioner so that heating can be performed by generated steam in the future.
Using a blower, the system feeds outside air through ducts to the controlled room in order to create a positive pressure environment. The system measures the pressure and excess air is exhausted to the outside air with a fine-control differential pressure damper.
Each outside air intake location on the first and second floors has a filter unit attached to it.
After converting the controlled room to a positive pressure environment, the number of breaching insects decreased markedly.
Before construction, the number of insects caught was 4,130 individuals and after construction, this number decreased to 324 individuals (92.15% decrease; data provided by the customer).