Air Conditioning

An air conditioner regulates the air temperature and humidity in a room. In recent years, the definition has changed again and again: If one of the two functions is missing, it is called partial air conditioning or ventilation. The latter exchanges the air in the room, while an air conditioner changes it.

The tasks of an air conditioner

The main task of the air conditioner is to provide a comfortable indoor climate - regardless of the weather and temperatures outside. When the air conditioner cools, it extracts heat from the air in the room. In the process, it releases the heat to the outside via a condenser and refrigeration circuit.

Air conditioning is a process of air treatment. Different processes are used in this process:

  • Heating of the room air

  • Cooling of the room air

  • Renewal of the room air

  • Air purification

  • Dehumidification and humidification of the room air

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Different modes of operation of air conditioning systems

Systems that are air- or water-bearing use surface heating systems and surface cooling systems, which consist of chambers filled with water. Air-conditioning of the air supplied from the outside is provided by the central construction elements. These temper, humidify, dehumidify and filter the air that enters the interior. This ensures the greatest possible flexibility in air conditioning individual rooms and parts of the building.

In large rooms, the air-only systems are used. The air conditioning is centralized and regulated by the supplied air. The system is mainly used in large rooms or halls, for example in theaters, department stores and large assembly rooms.

There is also the decentralized air-refrigerant system. It is a combination of a single-channel system with constant supply air and a split system. It consists of an evaporator, which extracts the heat from the room, and a condenser, which releases the heat to the environment. One split unit cools one room at a time and is placed in each room to be cooled.

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How a monobloc air conditioner works

Mobile air conditioners are monobloc units. They are similar in operation to a compressor refrigerator. A compressor draws in the gaseous refrigerant and compresses it until the temperature rises. The heated, still gaseous refrigerant passes through the compressor to the condenser. There, the refrigerant is cooled with the help of the outside air, it condenses and becomes liquid. The air conditioner returns the refrigerant to the evaporator via the expansion module.

A fan draws in the warm room air and blows it over the evaporator, cooling the air. The cooled air then flows back into the room. The liquid refrigerant evaporates, using the energy of the heat in the room air. Since the refrigerant is now gaseous again, it moves back to the compressor and compresses. The system is hermetically sealed so that no refrigerant is lost. When the air conditioner is to heat, the refrigeration cycle reverses.

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What types of air conditioners are there?

Air conditioners are divided into split air conditioners and mobile air conditioners. The mobile air conditioner device type offers more flexibility. The unit can be placed in any room. There are other distinctions within this subdivision:

  • Central building air conditioners

  • Decentralized air conditioners

  • Split air conditioner

  • Monobloc air conditioner

  • Inverter air conditioner

  • Window air conditioners

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For whom is a mobile air conditioner suitable?

An air conditioner is a sensible purchase for people who value cool indoor climates in the hot season. Especially in attic apartments, in poorly insulated buildings and in apartments with south-facing window fronts, the summer heat can become a problem at the height of summer. A mobile air conditioner can provide relief and cooling in these cases.

What should be considered when buying a mobile air conditioner?

  • Loudness: During operation, mobile air conditioners can become very loud. Up to 65 decibels are not uncommon. This volume can be compared with the operation of a running sewing machine or a television at room volume. Quietly operating mobile air conditioners reach volumes of 50 to 55 decibels. This is roughly equivalent to the volume of a modern refrigerator.

  • The refrigerant:Consumers should look for an environmentally friendly refrigerant and its global warming potential. The refrigerant R290 is not harmful to the ozone layer and has a GWP value of 3. The GWP value describes the Global Warming Potential and provides information on how high the greenhouse effect of the refrigerant is.

  • Operating costs and energy efficiency: An air conditioner consumes a lot of energy. Consumers should pay attention to a good energy efficiency class.

  • Size and weight: A mobile air conditioner should not be too large and heavy. Many units are equipped with wheels and handles for easy transportation.