Air conditioner, air conditioner indoor and outdoor unit communication system and control method thereof

Abstract

The invention discloses an air conditioner, an air conditioner indoor and outdoor unit communication system and a control method thereof. The air conditioner indoor and outdoor unit communication system comprises an outdoor communication module, an indoor unit communication module, a power supply detecting module, an energy storage module and a power supply module. The power supply module is usedfor providing electric energy for the energy storage module. The energy storage module is used for storing the electric energy and providing the electric energy for a communication loop when the communication loop is connected. The power supply detecting module is used for controlling the communication loop to be disconnected when it is compared that the power supply voltage of the power supply module is smaller than preset threshold voltage. The power supply detecting module is further used for controlling the communication loop to be connected when it is compared that the disconnecting timeof the communication loop is longer than the preset threshold time. Indoor and outdoor unit communication is directly disconnected when the power supply voltage is too low, the problem that due to thefact that the power supply voltage is too low, the indoor and outdoor unit communication fails to cause shutdown can be directly avoided without additionally arranging components and parts, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner, a communication system for internal and external units of an air conditioner, and a control method thereof. Background technique [0002] At present, the communication between indoor and outdoor units of household inverter air conditioners mostly adopts zero-fire wire communication. The zero-fire wire communication circuit is composed of common devices such as resistors, capacitors, diodes, triodes, and optocouplers. No additional chips are required, and the hardware cost is low. Therefore, it is widely used in household inverter air conditioners. field. [0003] Zero live wire communication is a current loop communication method. The on and off of the optocoupler in the circuit is determined by the loop current value. This current is greatly affected by the voltage. When the power supply voltage is low, the loop current becomes smaller, resulting in...

AI Technical Summary

Problems solved by technology

The magnitude of this current is greatly affected by the voltage. When the power supply voltage is low, the loop current becomes smaller, causing the optocoupler to fail to conduct, and the internal and external units cannot communicate normally, reporting a communication failure, which affects the normal use of users.

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