Patent ID: 9052882
Filing Date: 2015-06-09
Classification: G06F,H05K

Abstract:
1. A blower control device comprising: a memory that stores therein a pipeline resistance of inside of a device, a static pressure-air flow volume characteristic with respect to each ratio of respective rotation frequencies of a plurality of blowers arranged in series with respect to a ventilation flue formed inside the device, an air flow volume-noise level characteristic with respect to each of multiple different ratios of the rotation frequencies; and a processor coupled to the memory, wherein the processor executes a process comprising: determining a first air flow volume and a first static pressure of air flow through the ventilation flue on the basis of a static pressure-air flow volume characteristic corresponding to a ratio of predetermined rotation frequencies at which the blowers rotate, respectively; calculating a first noise level corresponding to the determined first air flow volume on the basis of an air flow volume-noise level characteristic corresponding to the ratio of the predetermined rotation frequencies; calculating a second air flow volume and a second static pressure of air flow through the ventilation flue when the blowers rotate at a rotation frequency ratio other than the ratio of the predetermined rotation frequencies with respect to each of the rotation frequency ratios other than the ratio of the predetermined rotation frequencies on the basis of respective static pressure air flow volume characteristics at the rotation frequency ratios other than the ratio of the predetermined rotation frequencies out of the multiple different ratios of the rotation frequencies of the blowers, a relationship between air flow volume and static pressure which indicates the pipeline resistance, and the first air flow volume and the first static pressure; changing an air flow volume-noise level characteristic at a rotation frequency ratio other than the ratio of the predetermined rotation frequencies with respect to each of the rotation frequency ratios other than the ratio of the predetermined rotation frequencies on the basis of the first air flow volume and the second air flow volume; calculating a second noise level corresponding to the first air flow volume with respect to each of the rotation frequency ratios other than the ratio of the predetermined rotation frequencies on the basis of the changed air flow volume-noise level characteristic; and determining a rotation frequency ratio corresponding to the lowest noise level in the first and second noise levels as a rotation frequency ratio at which the blowers are rotated.