Shaft-type cross-flow fan and method for manufacturing same

Abstract

[Problem] To provide a cross-flow fan having excellent ease of balance adjustment, low cost, high precision, high rigidity, and a high degree of silence without the need for an ultrasonic welding step, and to provide a method for manufacturing the cross-flow fan. [Solution] This method comprises: a first step of injection-molding a plurality of double fans made of resin and configured according to a cross-flow scheme, having a bearing portion and a fixed portion in a central wall; a second step of fabricating a connecting shaft corresponding to the desired fan length; a third step of inserting the connecting shaft fabricated in the second step into the bearing portion of the double fans molded in the first step; a fourth step of fixing the connecting shaft and the fixing portion using an engaging fixture; a fifth step of repeating the third and fourth steps to obtain the desired fan length; and a sixth step of adjusting balance as needed.

Description

technical field [0001] The present invention relates to a cross-flow fan used as a cross-flow blower for air conditioners, and more specifically, to an axial cross-flow fan that uses a continuous shaft and does not require an ultrasonic welding process, has little warping, and has excellent quiet performance, and a manufacturing method thereof. Background technique [0002] In Japan, domestically produced "indoor air conditioners" have been on the market since the 1950s. In the mid-1960s, "indoor air-conditioning equipment" was renamed "indoor air-conditioning" and spread to ordinary households. After environmental problems such as the production restriction of Freon, which destroys the ozone layer, etc., after 2000, the domestic penetration rate of indoor air-conditioning ( According to the Cabinet Office survey, families with more than two people) are always more than 80%. It can be said that the increase in the penetration rate is not limited to Japan, but also from a gl...

AI Technical Summary

Problems solved by technology

However, in the case of forming a cross-flow fan that rotates at a high speed of thousands of revolutions per minute and has a large fan length by extrusion, it is difficult to read from the records of this document whether the problems of accuracy and deflection can be solved. to answer

In addition, it is considered that due to the pressure difference between the two ends, there is still a problem with the weight balance due to the density difference of the resin.

Images