Power supply control device and method and multi-split air conditioning system

Abstract

The invention discloses a power supply control device and method and a multi-split air conditioning system. The power supply control device comprises an adapter and a controller, and the adapter is connected to a first power supply and a mains supply and used for controlling the first power supply to supply power under the condition that the mains supply is powered off; the adapter comprises: a detection voltage output end which is connected to a power supply detection module of the controller so as to indicate whether power is supplied by a first power supply or not; and at least one power supply voltage output end which is connected to the power supply control module of the controller. Multiple voltages are output through the adapter, and the load power supply requirement is met; and through the detection voltage output end of the adapter and the power supply detection module of the controller, the controller can identify whether power is supplied by the first power supply or not, sothat corresponding processing under the power supply of the first power supply is carried out. An original power supply loop of the controller does not need to be changed, a strong current loop doesnot need to be detected, the structure is simple, power supply switching control during mains supply outage can be conveniently, intelligently and efficiently achieved, and normal operation of the system is maintained.

Description

technical field [0001] The present invention relates to the technical field of power supply control, in particular to a power supply control device, method and multi-connected air conditioning system. Background technique [0002] In the multi-connected air conditioning system, when the power supply of some indoor units is cut off and offline, the electronic expansion valve and other loads are out of control, resulting in uncontrolled refrigeration system and abnormal operation. [0003] At present, in order to solve the above problems, the backup power supply is generally used for additional power supply, and the backup power supply is directly connected to the controller. It is necessary to change the original power supply circuit of the controller, and it is necessary to use the strong current detection circuit to determine whether the indoor unit is disconnected from the market. The power grid has a complex structure and is not smart enough to be efficient. Contents of...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a power supply control device, method, and multi-connected air-conditioning system, so as to at least solve the problem in the prior art that the power supply control structure is complicated and not efficient enough under mains power failure

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