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Communication system for automobile air-conditioning controller and external equipment

A technology for air-conditioning controllers and external devices, applied in transmission systems, vehicle components, electrical components, etc., can solve problems such as low stability and reliability, complex communication protocols, and failure to guarantee reliable and stable display, etc., to achieve strong driving ability, Strong anti-interference ability, simple, stable and reliable communication protocol

Inactive Publication Date: 2011-06-29
SHANGHAI FENGTIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing communication protocol is relatively complex, and its stability and reliability are low, and even its working mode often affects the response speed of the customer's operation of the air conditioner, and the reliability and stability of the display cannot be guaranteed in transmission, etc.

Method used

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  • Communication system for automobile air-conditioning controller and external equipment
  • Communication system for automobile air-conditioning controller and external equipment

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Embodiment Construction

[0023] The present invention is a communication system between an automobile air conditioner controller and an external device applied in the field of automobile electronics technology, and is a major improvement made on the basis of the shortcomings of the existing communication system between an automobile air conditioner controller and an external device , which has very important practical significance.

[0024] Such as figure 1 As shown, it is a specific circuit diagram of a serial communication interface circuit between an air conditioner controller and a CD player provided by the present invention. The ground wire of the air conditioner controller and the ground wire of the CD player are connected through terminals and wiring harnesses. The transmitting end TX is connected to the cathode of the first optocoupler U1, the anode of the first optocoupler U1 is connected to the +5V power supply through the first resistor R1, and the collector of the first optocoupler U1 is c...

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Abstract

The invention provides a communication system for an automobile air-conditioning controller and external equipment. The communication system comprises a serial communication interface circuit and a communication protocol of the air-conditioning controller and a CD player, wherein the interface circuit takes an optical coupler as the core, achieves isolation between an internal power supply and a port, also achieves the conversion between 5V and 12V levels, and has stable output and strong driving capability; the resistance current limiting technology is adopted to ensure that during normal operation of an IC (Integrated Circuit), the interface circuit can not be overburnt when short circuit occurs between the communication port and the 12V power supply, as well as between the communication port and the ground, and the current of the interface circuit is within the normal bearing range of the IC, so that the requirement of automobile self-protection function is satisfied, the formal definition of data transmission is simple and reliable, and the transmitting and receiving methods are reasonable; and as data checkout is added in the transmission process, accuracy of data transmission is ensured.

Description

technical field [0001] The present invention relates to the technical field of automotive electronics, in particular to a communication between an automotive air-conditioning controller and an external input and output device, that is, it is applied to the communication between the air-conditioning controller and the vehicle-mounted CD system, or between the air-conditioning controller and the center console . Background technique [0002] In the prior art, the automobile air-conditioning controller is used to control the temperature inside the automobile, and the control objects include: temperature mixing damper actuator, blowing mode damper actuator, fresh air damper actuator, compressor, blower and other components. The automobile air-conditioning controller Complete the following functions: air outlet temperature adjustment, blower mode adjustment (such as head blowing, foot blowing, defrosting, window blowing), fresh air or internal circulation, compressor ON / OFF, blow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08B60R16/02
Inventor 彭雄飞徐亮倪孟雄
Owner SHANGHAI FENGTIAN ELECTRONICS
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