Variable-air-volume heat dissipation method for direct-current charger

Abstract

The invention discloses a variable air volume heat dissipation method for a direct current charger, and belongs to the technical field of chargers. The method comprises the following steps: A, when the charger starts charging, all fans are not started, and a temperature sensor monitors the internal temperature of the charger in real time and transmits a temperature value to an air volume controller; B, in the charging process of the charger, if the air volume controller detects that the change of the internal temperature of the charger exceeds a preset value within a certain period of time, one or more sets of fans are started through a rotating speed controller, the rotating speed of the fans is adjusted till it is detected that the internal temperature of the charger is kept stable, andotherwise, all the fans are kept in the current state; C, after charging of the charger is finished, the fan which does not run keeps the current state unchanged, and the fan which runs continuously rotates at the maximum rotating speed for 3 min and then stops rotating. On the basis of keeping good heat dissipation of the charger, starting, stopping and rotating speed adjustment of the fan can becontrolled in real time, so energy consumption is reduced, and the electric energy utilization rate is increased.

Description

technical field [0001] The invention belongs to the technical field of chargers, and in particular relates to a variable air volume heat dissipation system and heat dissipation method for DC chargers. Background technique [0002] DC chargers are favored by the majority of users for their fast and efficient charging methods, and their market share is also increasing. [0003] During the charging process of the DC charger, the internal temperature of the charger is closely related to factors such as the material of the charger casing, the volume of the charger, the charging time, the current ambient temperature, and the heat radiation of the internal components. If the internal temperature of the charger is too high, it will increase the additional loss of electronic components, accelerate the aging of the components, reduce the service life, affect the charging efficiency, and increase the additional consumption of electric energy. Moreover, the built-in charging module of ...

AI Technical Summary

Problems solved by technology

[0005] There are at least the following technical problems in the prior art: most of the current DC chargers are equipped with multiple fans, and all the fans will rotate immediately during the start-up charging phase. In environmental situations, the heat dissipation control method that does not consider the power loss of the fan increases the operating burden of the charger, reduces the utilization rate of electric energy, and cannot effectively dissipate heat inside the charger.

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