## 3 Summary  
The aim of this study was to develop a concept for dust suction organization from the multi-cyclone dust collector that would ensure the minimization of the differences between the suction streams from individual multi-cyclone cyclones. It has been shown that the uniformity values of the suction streams from individual cyclones can be achieved by the appropriate shaping of the internal structure of the multi-cyclone dust collector. The method consists of dividing the dust collector of the multi-cyclone into several vertical partitions, thus creating identical segments of which the internal space is then divided by horizontal, independent, and isolated suction channels. Each channel has been assigned a specific group of single cyclones. The heights of channels \(h_{1}\), \(h_{2}\), and \(h_{3}\) formed by partitions in the settling tank were selected in terms to obtain the same values of pressure drop through the channels by using this purpose-built model of the segmented dust settling tank. It was not possible to achieve the equal values of pressure drop by only selecting channels geometrically by calculation, due to the rather complex flow in the sedimentation tank channels. Therefore, the final selection of the channel height was made during the experimental flow tests. Verification of the developed model for the dust settling tank segment was performed during the separation efficiency tests of the individual cyclones of the segment, using the appropriate values for mineral dust concentration in the suctioned air. Based on analysis of the results, modeling, and experimental studies of a single cyclone in the multi-cyclone segment, it was found that:  
1. In the case of a multi-cyclone consisting of a return cyclone with a tangential inlet, to which air flows from an unlimited space, uniform suction stream values from the individual cyclones of the multi-cyclone can be ensured using an equal suction streams resistance method. Such an effect can be achieved by an appropriate multi-cyclone dust settler structure change, consisting of dividing the settling chamber into independent segments and channels covering a specific number of cyclones. 2. A uniform value of the suction streams from the individual multi-cyclone cyclones can be ensured using a method of equal suction streams resistances through an appropriate structure change of the multi-cyclone dust settler, consisting of the division of the settling space into independent segments and channels covering a specific number of cyclones. 3. The initial height selection at the outlet \(h_{1},h_{2},\ldots\)\(h_{i}\), of the subsequent suction channels of the dust settler segment, in terms of equal resistance to the flow of air streams through the channels, can be made using a model of the multi-cyclone segment settler. The final selection of the number and height \(h_{1}\), \(h_{2},\ldots\)\(h_{i}\), and the channels, should be made during the flow experiments of a separate multi-cyclone segment. 4. \(Q_{Sc}\) values for the suction streams from individual cyclones of the \(S_{MT}\) segment before the dust settling chamber structure change have significantly different values in the range of 5.82-4.28 m\({}^{3}\)/h, which is 36%. The change in the multi-cyclone dust settling chamber structure, by dividing it into segments and dividing the segment settling chamber into independent and isolated suction channels, reduces these differences to 3-5%, which should result in higher cyclone separation efficiency values. 5. The algorithm for calculating the multi-cyclone settling tank segment of a motor vehicle air filter can be applied to the calculation of the different settling tanks, but with the same construction principle, i.e., with a division into segments and suction channels. A segment may contain a different number of suction channels, and each may be assigned a different number of cyclones. It is not advisable to assign more than two cyclone rows to a channel.