Speed regulation module of fan

Abstract

The invention relates to a speed regulation module of a fan, which comprises a plastic base (1), a pin (2), a printed circuit board (PCB) (3), screws (4), a metal pressing sheet (5), a temperature fuse (6), a metal oxide semiconductor (MOS) pipe (7), a radiator (8) and a fastener (9). The pin (2) is welded on the PCB (3), the temperature fuse (6) is arranged on the MOS pipe (7) through the metal pressing sheet (5), and the metal pressing sheet (5), the temperature fuse (6) and the MOS pipe (7) are fixed in the radiator (8) through the screws (4). The temperature fuse (6) and the MOS pipe (7) are welded on the PCB (3) covered on the radiator (8), and the plastic base (1) is fastened on the radiator (8) through the fastener (9). Compared with the prior art, the speed regulation module of the fan has the advantages of being stable in working, reliable in performance, easy to design and change, low in cost and the like.

Description

technical field [0001] The invention relates to a speed regulating module used in an automobile air conditioning system, in particular to a fan speed regulating module. Background technique [0002] The speed regulation module is an electronic component powered by a battery, which changes the voltage across the fan motor according to the signal from the air conditioner controller, thereby realizing the stepless speed regulation of the fan. The speed control module is mainly divided into vertical structure and horizontal structure type from the shape and installation structure. [0003] There are three main types of speed control modules on the market: one is linear control, the other is pulse control (PWM), and the other is mixed control of linear and PWM. In terms of function, there are two main types: one is the relatively simple circuit structure, which is mainly used to realize the speed regulation function, and the other is relatively complex circuit structure, which n...

AI Technical Summary

Problems solved by technology

[0005] The original sample puts the plastic base directly on the radiator without fixing it. During transportation, the plastic base will be separated from the speed control module due to vibration; some traditional designs use screws to fix the plastic base and the body, but because the radiator is made of Cast aluminum alloy, the surface is shot-peened, there will be screw tapping of the radiator, and since the body has been assembled with related parts during the installation of the base process, if the screw is slipping during this process, the product will be scrapped or Rework, increased cost of quality

[0006] In the design of the general speed control module, the thermal fuse (MTS) is installed on the radiator, close to the MOS tube; this design needs to consider the heat transfer efficiency of the radiator, whether the installation position of the MTS is reasonable, and the presence of the MTS cannot be detected in time The potential risk of excessive temperature of the device

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