Fresh air unit - operating principle, operation

Ventilation installation - part of the system consisting of channels and air ducts, elements for injection and air removal from the premises. The call for such units is the provision of healthy conditions for living in residential, industrial, administrative and other buildings.

Operating principle

The air-handling unit forcibly pushes air into the room. In the process of work, the system simultaneously saves space from dust and toxins, and also heats it to a comfortable temperature.

Air that enters the duct, is processed, moving through separate filters with varying degrees of purification. The quality of the output stream can be changed by the user depending on the required parameters.

The air handling unit creates high pressure areas, whereupon the exhaust air leaves the rooms systematically. The output is through the mines of the system.

Diagram of the air handling unit

To better understand the principle of the system, it is necessary to consider the flow pattern of air flows:

• The red marker is air that must be worked out;
• Blue marker - incoming and clean;
• Yellow - spent, outgoing air.

Device

The device of the air-conditioning unit is the following:

1. Air valve - provides fresh air into the system.
2. Filters - clean the space of unpleasant odors, pollution and toxic substances. Their quality depends on the quality of air purification.
3. Heaters - preheat the air at the entrance to the system to the set temperature. Can be water or electric.
4. The fan is the main functional element of the installation, which is responsible for the intake of air from the outside.
5. Silencers - reduce the level of vibration created by the elements of the system, to the maximum possible level.

Application

The characteristics of the ventilation system of the supply type facilitate its operation in premises of almost any purpose, from residential to industrial. Effective forced air exchange allows residents and staff to feel comfortable and maintain good health throughout the day.

Virtually every modern air-handling unit is capable of:

• Make effective cleaning of the space from dust, cigarette smoke, exhaust gases.
• Adjust the humidity of the air.
• Monitor and change the temperature of the space.

The air handling units are indispensable in facilities with a large number of personnel. It is in such places that the most acute shortage of fresh air. The installation of such systems meets the requirements of modern safety standards. According to them, the air in the public buildings must be completely renewed at least every hour.

Features of choice

Supply plants should be selected not only based on the available budget, but also according to the functionality, based on the parameters of electricity supply, air data, the number of people in the room.

An important criterion is the appointment of the room. So, if it is necessary to service an industrial facility, the performance of technological equipment is the first, which is reflected in the necessary multiplicity of air exchange.

Advantages and disadvantages

Modern air-supply units of ventilation systems are equipped with effective automation, which maintains the given airspace indicators at a stable level.

Due to the effect of heat recovery units of this category demonstrate an economical energy consumption when establishing comfortable conditions in the premises. The installation of the air-handling unit is guaranteed to ensure the outflow of the processed air and its supply.

Despite the obvious advantages, air-handling units of the supply air type have some disadvantages. Here it is worth noting certain difficulties that arise during the development and installation of the system in dense residential development. The most common problem is the lack of free space to accommodate the installation in accordance with safety standards and regulations.

During operation, the air handling units create a perceptible vibration, which results in certain noise effects, causing discomfort in people nearby. Elimination of inconvenience requires additional costs for the installation of insulation materials, for example stacking of fiberglass, lamella-mats, bitoplast. Such measures are quite expensive.

Eventually

In the rapid whirlpool of the life of large cities, quite often a person does not have the opportunity to enjoy a sufficient amount of clean, fresh air in the premises. The problem is solved by installing the air-handling units. Modern functional systems ensure the establishment of a healthy microclimate both in residential and public facilities due to forced air renewal.