Joint-control board centralized control circuit system applied to indoor and outdoor units

Abstract

The invention discloses a joint-control board centralized control circuit system applied to indoor and outdoor units. The system comprises an outdoor unit and n indoor units, wherein an MCU is disposed inside the outdoor unit; an MCU is disposed in each indoor unit; the MCUs of all the indoor units are electrically connected to the MCU of the outdoor unit via a joint-control board centralized control circuit; the joint-control board centralized control circuit comprises n relays A and n relays B; the n relays B are in one-to-one correspondence with the MCUs of the n indoor units; and the n relays B are in one-to-one correspondence with the n relays A. Through application of the system disclosed by the invention, switching-on an switching-off signals of the multiple indoor units can be conveyed by a hardware circuit in an accurate and centralized manner in actual engineering, so that possible wrong judgments of the outdoor unit generated because the signals can be disturbed easily during communication conveying of the switching-on and switching-off signals can be avoided. In this way, normal and correct running of a whole air conditioner system can be ensured.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a centralized control circuit system of a combined control board for indoor and outdoor units. Background technique [0002] At present, the method for centralized processing of the on and off signals of multiple indoor units is as follows: each indoor unit transmits the sign of the on or off signal of its own wire controller or remote controller to the input port of the MCU of the indoor unit control processor through the input circuit; The indoor unit transmits the indoor unit startup or shutdown flag to the outdoor unit at a fixed period through RS485 communication or HBS communication technology; If the on / off signal signs of the indoor units are displayed as "on", the outdoor units are regarded as having a power-on signal; In practical engineering applications, when the installation location of the outdoor unit is longer than the installation location of the indoor...

AI Technical Summary

Problems solved by technology

In practical engineering applications, when the installation location of the outdoor unit is longer than the installation location of the indoor unit, and the communication module mostly uses a weak current power supply, the transmission signal is easily interfered with, and the judgment of the outdoor unit may be wrong, causing the air conditioner to fail. not functioning properly

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