Temperature activated ventilation systems
Introduction
A air conditioner, also called air handling unit (UMA) or Air Treatment Unit (UTA, in Spanish regulations), is the fundamental device in the treatment of air in air conditioning installations, in terms of the correct flow rates "Flow (fluid)") of ventilation (outside air), cleaning (filtering), temperature (heating or cooling) and humidity (humidifying in winter and dehumidifying in summer).
By themselves they do not produce heat or cold, which comes to them from external sources (boiler "Boiler (heating)") or refrigeration machines) through water or refrigerant gas pipes. There may, however, be an own contribution of heat through electrical support resistances incorporated in some equipment.
It consists of an external air inlet, a filter, a fan, one or two hot/cold exchangers, a humidifier (for winter), and a droplet separator.
Objective and operation
The air conditioner is capable of treating the three basic parameters of the quality of the air-conditioned environment, which can be summarized as: air renewal and cleaning (low content of particles, dust, in suspension), temperature control (both in summer and winter) and adequate relative humidity. Its objective is to supply a flow "Flow (fluid)") of treated or conditioned air to be distributed through a network of ducts to the inhabited spaces.
Components
Contenido
Para dicho uso su constitución varía según fabricante y solicitación. Debe advertirse que, en función de uso, no todos los climatizadores tienen todas las partes que se relacionan a continuación:.
Air inlet and mixture
The air that has to be treated in the air conditioner can be:
The air mixture is not always used, because the recirculated air may not be in adequate conditions (odors, bacteria...) and then only the outside air is treated (primary air) but, in order not to have to introduce excessive flows of outside air, the missing thermal energy must be taken, through water pipes, to terminal elements (fan coil units, inductors).