Patent ID: 8116060
Filing Date: 2012-02-14
Classification: H01T

Abstract:
1. An ionizer comprising: a fan for blowing air, the fan provided in an air blowing port which opens in a case; and a plurality of discharge electrodes for generating positive and negative ions by corona discharge, the discharge electrodes provided in the case at positions facing the air blowing port, wherein the ionizer has a plurality of discharge electrode pairs each constituted by two discharge electrodes for generating ions of different polarities, and when a tip-center distance denotes a distance from an electrode tip to a center of the air blowing port, the tip-center distances of the two discharge electrodes in the discharge electrode pairs are different from each other, wherein the ionizer includes a plurality of first discharge electrode pairs each constituted by a positive discharge electrode with a large tip-center distance and a negative discharge electrode with a small tip-center distance, and a plurality of second discharge electrode pairs each constituted by a positive discharge electrode with a small tip-center distance and a negative discharge electrode with a large tip-center distance, the number of the first discharge electrode pairs being the same as the number of the second discharge electrode pairs, and the first discharge electrode pairs and the second discharge electrode pairs are disposed alternately around the center of the air blowing port, and wherein the tip-center distance of the positive discharge electrode in the first discharge electrode pairs is equal to the tip-center distance of the negative discharge electrode in the second discharge electrode pairs, and the tip-center distance of the negative discharge electrode in the first discharge electrode pairs is equal to the tip-center distance of the positive discharge electrode in the second discharge electrode pairs.