Fan for Air Conditioner

Abstract

Fan apparatus including a fan, a shaft coupled to the fan for transmission of driving force from a motor to the fan, a rotor bushing of an insulating material joined to a rear end portion of the shaft, a rotor joined to the rotor bushing for transmission of the driving force to the shaft through the rotor bushing, and a stator mounted so as to be positioned on an inside of the rotor to form a BLDC motor together with the rotor, thereby reducing noise and enhancing fan efficiency by employing the BLDG motor which can make stable operation of the fan and increase an air flow rate.

Description

TECHNICAL FIELD[0001]The present invention relates to fan apparatuses for air conditioners, and more particularly, to a fan apparatus having a stable and high efficiency BLDC motor employed therein for enhancing fan, and heat exchange efficiencies.BACKGROUND ART[0002]In general, in the air conditioners, there are split type air conditioners each having an indoor unit and an outdoor unit respectively installed in a room space and an outdoor separately, and unit type air conditioners each having an indoor unit and an outdoor unit fabricated as one unit, for installation on a window or wall, wherein the split type air conditioners are used widely because, not only of sizes of the indoor units and the outdoor units that become the larger as cooling / heating capacities of the air conditioners become the larger, but also of heavy vibration of the outdoor units corning from compressors therein.[0003]The split type air conditioner is provided with the indoor unit in a room to make heat excha...

AI Technical Summary

Benefits of technology

The present invention provides a fan apparatus for an air conditioner that can reduce noise, enhance fan efficiency, and increase heat exchange efficiency. This is achieved by using a BLDC motor that can make stable drive of the fan, and increasing air flow rate. The fan apparatus includes a fan, shaft, rotor bushing, rotor, and stator. The fan is mounted on an inside of a fan housing, and the shaft is coupled to the fan for transmission of driving force. A supporter is inserted in an upper surface of the fan housing for fastening the stator thereto, and a rotor is coupled to a rear end portion of the shaft. The stator is securely mounted on the supporter so as to be positioned on an inside of the rotor to maintain concentricity with the rotor. The technical effects of the present invention are reduced noise, enhanced fan efficiency, and increased heat exchange efficiency.

Problems solved by technology

In the meantime, the foregoing outdoor unit of the related art air conditioner has a limited installation place due to high concentration of a city, with consequential strengthening of environmental control, and becomes an object of complaints due to noise and heat emission.

However, the air conditioner outdoor units of a front suction / discharge type has low fan, and heat exchange efficiencies due to a smaller air suction area than the air conditioner outdoor unit of three side suction / discharge type.

Moreover, the general single phase or three phase induction motor used for the fan of the air conditioner outdoor unit of the front suction / discharge type has problems in that an overall efficiency is low below 40˜50%, and rotation speed variation is limited to a small range due to a narrow stable torque range.

If a rotation speed is outside of the stable torque range, noise becomes heavier and efficiency becomes poorer.

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