How does the kitchen hood

By the principle of operation, all exhaust systems resemble a vacuum cleaner, but they face completely different tasks. The hood is designed to remove various particles that appear in the air during cooking, thereby prolonging the life of furniture and other accessories. How is this function implemented? Consider the hood and its main components.

Work specifics

This system was specially developed by engineers to filter the air and remove contaminants from the cooking area: splashes of grease, soot from the gas stove.

The key task is to remove the products of combustion of natural gas, which can have a negative impact on human health.

Also the function of the kitchen hood is cleaning up of carcinogens, maintaining a normal atmosphere in the room. It provides repeated inflow of fresh air, which, according to the established sanitary standards, has a minimum value of no less than 10. That is, the system must filter the room air at least 10 times within an hour.

How the hood is arranged depends directly on the mode of operation used. Modern exhaust systems can operate in two modes: remove polluted air or filter it.

Classification by type of cleaning

According to the method of air purification, all exhaust devices can be divided into two large groups. there is recycling systems: they pass air from the kitchen through special filters and return them back. In fact, they are not even exhaust, because the air from the room does not go anywhere, but simply undergoes cleaning due to the correct components.

The second type of devices - flow-throughthat take the polluted air into the ventilation system of the house, and then beyond. These hoods are equipped with a special pipe - it can be like corrugation, and metal air duct of round or square section.With its help, the unit is connected to the ventilation.

If we talk about the size, the devices of the first type are often more compact, and it is much easier to connect.

Today in the market there are combined hoods: they combine in themselves both options of work, between which you can switch as needed.

Main components

The device of any class of exhaust in your kitchen is quite simple. In flow models, the lower part acts as a grease catcher or prefilterwhose task is to trap particles of fat and soot.

Modern models "hide" him behind a decorative cover.

Inside the air intake are located fansdriven by engines specially designed for use on the hood. With a direct-flow system for the fans is air ductconnected to the ventilation system of the building.

Coarse Filter

In the recirculation hoods after the fan are installed carbon filters fine cleaning, the task of which is to remove unpleasant odors, because the air flow returns to the kitchen.Coarse filters are made of durable aluminum, they can be washed as greasy dishes. They are very light and not subject to corrosion. Carbon filters are inserted using a special cassette, they are very thin, they must be changed according to the recommendations in the instructions for each hood.

Carbon filter in the hood

Housing The system is made of thin metal or composite materials with noise reduction for exhaust systems of a new generation. There is practically no difference in performance, so each user chooses according to his taste.

The principle of the standard kitchen hood is extremely simple:

• plug the power cord into the outlet;
• press the key with the desired drawing power (denoted by dots or numbers from 1 to 3);
• asynchronous motor is gaining momentum, ventilation is working.

If the home network is grounded, then it is good - otherwise it is better to carry out separately, because the gas pipe passes nearby.

Electrical components

Any kitchen hood always consists of at least two branches:

1. Lightingwhere it is not accepted to use LEDs, as a very complex circuit is obtained, and flickering appears, which damages the human body.Simple incandescent bulbs or energy saving elements are used everywhere.
2. The second main element is enginewhich has a number of security features. These are fuses, capacitors to extinguish sparking at the collector type of motors. To protect against breakdown spark put varistorswhose resistance changes at voltage surges. This spare part is always installed as a pair. When a spark penetrates, the voltage goes to the exhaust housing and goes around the entire system, protecting the home electrical network from overloading and the motor winding from burnout.

On the kitchen hood can be installed collector the engine is not afraid of overheating, but manufacturers additionally supply them with thermal fuses. Because of this, the noise effect will be above the norm: for exhaust, this figure is directly dependent on the type of electric motor installed. Therefore, it will be cheaper and better to function. asynchronous squirrel cage rotor engine.

A few more words about the lighting - many users do not pay enough attention to it, but in vain. Better to use halogen lampsthey are energy-saving, they are not afraid of frequent switching on or off, they give a diffused light from which the eyes do not get tired.

Exhaust fan

An important component for hoods is fanwhich pulls out the polluted air from the room. Well proven in exhaust systems diametrical or tangential fans - they hold the maximum load well.

The fan impeller looks like a hollow cylinder of blades slightly bent forward, which creates a uniform air flow. This type of product has a high efficiency = 0.7, high air flow, which is easily sent to any convenient side, low noise exposure. They also create a fairly low pressure in the system.

Some practical tips

If you are not cramped in cash, then pick up a kitchen hood, which can operate in two modes - take the air out of the kitchen and recirculation mode.

As for the engine: in order to avoid negative pressure on the ears, it is better to purchase a system with two low-powered engines than with one powerful one.

It is already on sale almost noiseless hoods with a noise level of no more than 40 dB.

In specialized stores there are many models, it is sometimes difficult to navigate and choose what you need. We hope that this article will help you to buy a reliable helper in your house, which will make daily cooking very convenient and safe for the health of the whole family. Also you will find information on existing types of hoods.