The secret of the turtle
Quiet, robust and inexpensive
Yet, nobody is awoken by a howling motor. The Turtle Blower’s noise level of 40 dB(A) acoustic pressure makes it rather a quiet companion. This is also the result of its smooth-running design, which generates extremely low levels of vibration. In respiration devices, the blower is given additional damping and is encased in a foam cage within a soundproof box. The air intake and outlet ducts meander like an exhaust system for optimum noise minimisation. The result is that the Breas iSleep device, for example, has a noise level of just 21 d B ( A ) acoustic power – perfect for a good night’s sleep.
The engineers at St. Georgen achieved the smoothness with which the blower runs by using an iron-free motor. Air coils are used instead of stator teeth. This means that the motor has no magnetic resistance, generates less structure-borne noise and has lower power loss. Because the EC technology employed has no brushes (wearing parts), the blower lives up to its nickname in terms of service life: around 20,000 hours, well over two years in “around-the-clock” operation – even in unfavourable conditions. “Dust particles hardly affect the blower. In principle it works like a vacuum cleaner,” explains the Product Manager, stressing the robustness of the centrifugal blower. The EC motor’s hallmark energy efficiency means not only low current consumption. In the case of the Turtle Blower it means above all else improved dynamics. The fact that it is highly competitive is the result of these numerous technical advantages, but also the result of its cost-effectiveness. Its relatively low production costs also makes it economical for the customer.
One for all
While the core area of application of the Turtle Blower today is in respiration devices, its secret has not gone unnoticed in other industries: high pressure and low flow rate. The ideal working level for the CPAP application is also very interesting for other applications.
For example, the standard versions of the blower can also be found in hot air soldering devices and in smoke extraction systems. Take the TITANUS® product family of the company Wagner Group GmbH, the pioneering and globally leading supplier of innovative complete solutions in fire protection. Here, the standard Turtle Blower ensures that air is constantly extracted from the monitored area and conveyed to the detector unit via a pipe system that may be up to 560 metres long. The continual suction power required for this sensitive task is reliably provided by the high pressure of the blower. Because the blower is extremely robust, this smoke detector system is especially well suited for problem areas where there is a high incidence of dust or even radiation. The system is practically noiseless, as the detector in which the quiet turtle works is located outside the monitored rooms. Therefore this system is well suited to detect smoke early, for example in hospital wards or in hotel rooms.
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