Information about refrigeration, air-conditioning,
and ventilation engineering


Inverter technology has a future


A space cooling system must produce more performance at high outside temperatures than at low ones—of course Let's suppose that peak performance is designed for an outside temperature of 35 °C. That means traditional technology is oversized at temperatures below 35 °C. The consequence is constant switching on and off.

Not so with inverter technology! This flexibly adjusts your cooling performance to prevailing demand. Cooling performance is automatically reduced if room temperature approaches the desired temperature (just like with a car, once you've reached the desired speed you ease up on gas).

So no more switching on and off! 

Energy savings/Energy efficiency

Because every day isn't over 30 °C even in the nicest summer, conventional air-conditioning technology, which must be designed for more than 30 °C, is necessarily oversized. The consequence is that the system isn't run continuously. That alone is clearly inefficient. (Once again a comparison with car driving: Without an inverter it's like full throttle or full brake application. With an inverter it's like judicious acceleration depending on the traffic situation. It's obvious what that means for driving comfort and the petrol bill.)

Operation occurs primarily between 20% and 70%.

Special developments increase the energy savings in addition to this basic efficiency effect. To name the most important: optimized frequency regulation of the electric motor ensures the lowest current consumption at each frequency. An optimized DC motor with perfected construction of the electrical motor increases energy efficiency. As do, once again, the oscillating compressor (for monosplit inverter systems) and horizontal scroll compressors (for multi-split inverter systems). Specifically, long-term trials in a Mediterranean climate yielded 30 per cent (!) energy savings. Even greater savings are to be expected in our temperate climate with significantly more partial load!

Powerful operating method 

Inverter air-conditioning devices work with extreme flexibility: high performance when necessary, otherwise reduced performance adjusted to need. This flexibility is also useful in the reverse case, in other words when high performance is spontaneously demanded. If actual and desired temperatures are still widely separated, the device mobilizes powerful reserves (analogous to kickdown with automatic transmission when driving). So that you have an idea: An inverter air-conditioning device needs 1/3 less time than a traditional device to bring a room to the desired temperature.

Achieve desired temperature and maintain it precisely. That's what the inverter stands for. 

Performance reserves can be mobilized as needed in heating mode too. Thus for instance an inverter monosplit at −5 °C outside temperature has a 60 per cent performance plus relative to a traditional device.

Important: This powerful mode also has an energy-saving effect. Because the desired temperature is quickly achieved, you can simply switch the device off when it's not needed.