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A two-speed fan abnormal diagnosis system and its diagnosis method

An abnormal diagnosis and fan technology, which is applied in circuit breaker testing, non-variable pumps, pump control, etc., can solve problems such as whether the relay is stuck or the switch is not in good contact, and there is no output, so as to improve fuel economy. Effects of increasing reliability and reducing heat loss

Active Publication Date: 2022-06-24
JIANGXI CHANGHE AUTO
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a two-speed fan abnormality diagnosis system, which solves the problem of inability to check whether the relay that controls the low-speed operation is stuck or the switch is in poor contact when the current automobile cooling fan is running at low speed. The problem of detecting the output situation

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  • A two-speed fan abnormal diagnosis system and its diagnosis method
  • A two-speed fan abnormal diagnosis system and its diagnosis method

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] like figure 1 The shown two-speed fan abnormality diagnosis system is characterized in that it includes a power supply module 1, an MCU single-chip microcomputer 2, a diagnosis module 3, an alarm module 4 and a fan motor 5, and the power supply module 1 is used to maintain the MCU single-chip microcomputer 2, diagnose The power supply of module 3, alarm module 4 and fan motor 5, the MCU single chip 2, diagnosis module 3, alarm module 4 and fan motor 5 are electrically connected; the alarm module 4 is provided with an acousto-optic alarm 41 , the sound and light alarm 41 is electrically connected with the MCU single chip 2; the MCU single chip 2 records the normal information of the fan.

[0025] The diagnosis module 3 is connected with a first relay 31, a second relay 32 and a third relay 33. The first relay 31 controls the fan motor 5 to run at a low...

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Abstract

The invention discloses a two-speed fan abnormal diagnosis system, which is characterized in that it includes a power supply module, an MCU single-chip microcomputer, a diagnosis module, an alarm module and a fan motor, and the power supply module is used to maintain the MCU single-chip microcomputer, the diagnosis module, the alarm module and the fan The power supply of the motor is electrically connected between the MCU single-chip microcomputer, the diagnostic module, the alarm module and the fan motor; the alarm module is provided with an audible and visual alarm, and the audible and visual alarm is electrically connected with the MCU single-chip electromechanical; The MCU MCU records the normal information of the fan. The invention solves the problem that it is impossible to detect whether the relay controlling the low-speed operation is stuck or the switch has no output due to poor contact when the cooling fan of the automobile is running at a low speed.

Description

technical field [0001] The invention relates to the technical field of automobile fan diagnosis, in particular to a two-speed fan abnormality diagnosis system and a diagnosis method thereof. Background technique [0002] Now the general automobile cooling fan is a single-motor single-winding fan. In order to save fuel consumption and meet the requirements of different working conditions for cooling air volume, a current limiting resistor is usually added to the input end of the cooling fan to realize both high-speed and low-speed operation of the cooling fan. speed. The relevant circuit principle is that the coil power supply of the low-speed relay is connected to the ignition power, the coil control is connected to the control terminal C of the ECU microcontroller, the switch input is connected to the ignition power, and the switch output is connected to the low-speed fan input; the coil power supply of the high-speed relay is connected to the ignition power, and the coil c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00G01R31/327
CPCF04D27/001F04D27/008G01R31/327
Inventor 陈兴文李兆燕咸奎喜洪耀东洪贵钟
Owner JIANGXI CHANGHE AUTO
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