Communication system and communication method of multi-online air-conditioner

Abstract

The invention discloses a communication system and a communication method of a multi-online air conditioner. Inner machines connected on a communication bus and with only address marking information are detected and recorded by the inner machines. The inner machines receive broadcast data frames sent by an outer machine and send responding data frames according to an address order in sequence. On the condition that unchangeableness of the prior communication speed and reliability are guaranteed, communication efficiency of the inner machines and the outer machine is increased and communication time is shortened by means of the communication method of the multi-online air conditioner.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a multi-connected air conditioner communication system and communication method. Background technique [0002] The multi-connected air conditioning system can realize centralized management of multiple indoor units with only one outdoor unit, and has the advantages of independent control of indoor units, flexible use, good scalability, beautiful appearance, and small footprint. In the multi-connected air conditioning system, one outdoor unit can be connected to 1-128 indoor units through the communication bus. Since many communication chips do not have an automatic competition sending mechanism (such as MM1192), two or more chips cannot send data to the bus at the same time, otherwise it will cause data confusion on the communication bus. In order to ensure the reliability of communication, the communication between internal and external machines usually adopts asynchronous ...

AI Technical Summary

Problems solved by technology

[0004] Outer unit-inner unit 1-outer unit-inner unit 2-outer unit-inner unit 3-…outer unit-inner unit 1-outer unit-inner unit 2-outer unit-inner unit 3-…, use this kind of on-demand Although the communication method can guarantee the reliability of communication, this one-question-one-answer communication method consumes a lot of communication time

When the external machine queries the data of the internal machine, it must first send a data frame containing the address of the internal machine on demand, and then the internal machine with the corresponding address can respond and send data. Due to the non-real-time nature caused by the communication time, the operation of the entire system will be caused. and state delays will seriously affect the normal operation of some time-critical systems

[0005] In view of the above problems, this solution proposes a multi-connected air conditioner internal unit, external unit and the working method of the internal unit and external unit to solve the problems of long time-consuming and low communication efficiency of the on-demand communication method in the prior art

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