Automobile air-conditioning evaporating fan with adjustable air volume, low noise and no interference

Abstract

The invention relates to an automobile air-conditioning evaporating fan with adjustable air volume, low noise and no interference. The automobile air-conditioning evaporating fan comprises two hollow cylindrical centrifugal fans, two volutes, a resistance speed regulator and a permanent magnet direct current motor, wherein the two centrifugal fans are fixedly connected to two ends of a center rotating shaft of the direct current motor; the sealing volutes for allowing air to enter from the end part are arranged outside excircles and the end faces of the centrifugal fans; and the resistance speed regulator is connected between a direct current power supply and the direct current motor in series. According to the automobile air-conditioning evaporating fan disclosed by the invention, the resistance speed regulator can be used for adjusting the air volume; blades of the centrifugal fans are arrayed in a non-equidistant way, so that noises are reduced; the volutes accommodate the centrifugal fans, so that air leakage and pressure relief are avoided; an electric brush box is lengthened and the service life of an electric brush is prolonged; a flowing channel for generating electromagnetic waves is arranged on a line of an electric brush device and is combined with an electric spark-free commutator, so that the possible electromagnetic interference of the whole motor to vehicle-mounted television and telephone and the like is basically eliminated; and a clearance is reserved between a motor casing and an end cover and the temperature rise of the motor is reduced, so the automobile air-conditioning evaporating fan adapts to the operation at high temperature in summer.

Description

technical field [0001] The invention relates to an automobile air-conditioning fan, in particular to an automobile air-conditioning evaporating fan with adjustable air volume, low noise and no interference. Background technique [0002] In the prior art, the evaporating fan used in the air conditioner installed in the cab of a modern car or the passenger compartment mainly consists of three parts such as a centrifugal fan, a fan volute and a permanent magnet DC motor. [0003] The automobile air-conditioning evaporation fan of the prior art has the following deficiencies: [0004] ① High temperature rise. The evaporating fan of the automobile air conditioner is usually installed in the cavity where the evaporator assembly is not easy to disassemble. The heat dissipation conditions of the motor are poor, especially in summer when the temperature rises above 45 degrees, which affects normal operation. [0005] ② The air volume cannot be adjusted. The evaporating fan is driv...

AI Technical Summary

Problems solved by technology

The evaporating fan of automobile air conditioner is usually installed in the cavity where the evaporator assembly is not easy to disassemble. The heat dissipation condition of the motor is poor, especially in summer when the temperature rises above 45 degrees, which affects normal operation.

[0005]② The air volume is not adjustable

[0006]③ Loud noise

[0007] The AC electromagnetic interference generated by the operation of the DC motor is relatively low Large, affecting the listening and viewing effects of various car TVs, radios, mobile phones, etc.

[0008] short working life

The shortest service life of the evaporating fan is the core component of the permanent magnet DC motor, which usually has an effective working life of about 2500h, and it is inconvenient to disassemble and repair if it fails.

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