Cooling fan speed control device, control system and speed control method thereof

Abstract

The invention relates to a cooling fan rotational speed control device, a cooling fan rotational speed control system and a rotational speed control method. The cooling fan rotational speed control system comprises the control device and a cooling fan; and the control device comprises an inside-vehicle ambient temperature detection module, an outside-vehicle ambient temperature detection module, an air conditioner pressure detection module and a control module. The inside-vehicle ambient temperature is detected, the inside-vehicle comfort temperature difference is calculated, the inside-vehicle comfort temperature difference is compared with a set temperature difference limiting value, if the inside-vehicle comfort temperature difference does not meet the requirement, an air compressor isstarted, the air conditioner refrigerant pressure is detected, if the air conditioner refrigerant pressure is in a set value range, the inside-vehicle ambient temperature, the air conditioner refrigerant pressure and outside-vehicle ambient temperature data are processed correspondingly, and the rotational speed of the cooling fan is obtained. Therefore, the rotational speed of the cooling fan canbe adjusted correspondingly through detected related data, multi-stage control and precise control over the rotational speed are achieved, the cooling and heat dissipating requirements are met, and unnecessary energy is not wasted.

Description

technical field [0001] The invention relates to a cooling fan speed control device, a control system and a speed control method thereof, and belongs to the technical field of cooling fan speed control. Background technique [0002] The role of the cooling fan in the motor vehicle is very important. It is used to cool the related equipment and ensure the normal operation of these equipment. Different motor vehicles, the internal cooling fan may have different role objects, because in general, the equipment that needs cooling fans for cooling and heat dissipation in motor vehicles include: vehicle-mounted air-conditioning condensing radiator (referred to as air-conditioning condenser), intercooling radiator (referred to as intercooler) and antifreeze cooling radiator (ie coolant radiator), therefore, the cooling fan in some motor vehicles only cools and dissipates one of the above three devices, such as air conditioning condenser or intercooler The cooling fan in some motor v...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cooling fan speed control system and its speed control method to solve the problem that the existing cooling fan speed control method cannot achieve multi-level adjustment

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