Before grille for axial and radial fans ebm-papst presents an efficient measure for the refrigeration, air and climate technology with the front guide grid FlowGrid and thus a sign to the considerable noise reduction. Noise and additional sounds occur when the inflow to the fan is disturbed: due to different installation conditions such as such as an asymmetric intake situation arise strong air turbulence. Howard Schultz is actively involved in the matter. The closest places connect the air turbulence to the so-called Vortex braids. They make directly on the rotating impeller blades, resulting in noise: noise wideband and narrowband in addition, tonal noise components, which are also known as propeller noise or rotary sound. Mulfinger engineers have developed the special reserves the Guide grid FlowGrid, acting virtually as a rectifier on the air.
The Vortex braids are split at the meeting on the grid and considerably weakened in the flow.The first directional grille on the suction side reduced so the SPL over the entire frequency range decreases noise-generating errors drastically as a result, but in particular the annoying sound of Rotary in the low frequency range. The use of the before guide grid suitable for axial like centrifugal fans alike. And best of all: the power and the air output remain virtually unchanged. A reduction of to 3.9 dB(A) and Rotary tone controls to 16 dB noise level is possible through the use of the before guide grid such as when a condenser with axial fan. The insulation and soundproofing effort drops so significantly and noise regulations are easier to comply with. Another way to acoustic improvement can be achieved, in which the described before grille with the ebm? Pope combined diffuser AxiTop on the air outlet side. So to increase the energy efficiency and noise emission again reduced, especially in the Middle frequency range. The first directional grille is made of durable composite material and available to fire class UL94-5VA.
In addition to The FlowGrid also for all air-technical devices such as flat air-conditioners, air handling units, air cleaner and heat pumps, condensers is suitable. Users will soon benefit from the advantages of reducing noise in the low frequency range: the first versions will be available in the spring of 2014. Problem: Emergence of air swirling through asymmetric intake range. Solution: The front guide grid FlowGrid dramatically reduces the errors in the inflow-generating noise. About ebm-papst, the ebm-papst group is the world’s leading manufacturer of fans and motors. Since inception, the technology company has continuous global market standards. Ranging from the market of electronically controlled EC fans, the fan wings, aerodynamic improvements to resource-conserving material selection including with organic materials. In the past financial year 12/13 achieved revenues of nearly 1.4 billion ebm-papst employs 18 production sites (among others in Germany, China, United States) and 57 sales locations worldwide approximately 11,000 employees and staff. Fans and motors of the world leader can be found, inter alia in the ventilation, air-conditioning and refrigeration equipment, household appliances, heating technology, IT and telecommunications, for applications in the passenger car and commercial vehicle engineering in many industries.