Control method, device, storage medium of multi-connection system and multi-connection system

Abstract

The invention discloses a control method, device, storage medium and multi-connection system of a multi-connection system. The method includes: determining whether the multi-connection system is in the load conversion stage; if the multi-connection system is in the load conversion stage, determining the multi-connection system Whether the coil temperature of the running indoor unit is greater than or equal to the upper limit of the set heating overload temperature range; if the coil temperature of the running indoor unit in the multi-split system is greater than or equal to the set upper limit , then control the opening of the refrigerant throttling device of the stopped indoor unit in the multi-split system, so that part of the refrigerant that should flow to the running indoor unit will flow to the stopped indoor unit and then flow back to the outdoor heat exchanger of the multi-split system. The solution of the present invention can solve the problem that the indoor unit of the multi-connected air conditioner unit is prone to overload protection and shut down when the heating load changes, which affects the operation reliability, and achieves the effect of improving the operation reliability.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and specifically relates to a control method, device, storage medium and multi-connection system of a multi-connection system, and in particular to a control method, device, storage medium and multi-connection system for preventing overheating protection of an air conditioner multi-connection connection. Background technique [0002] The air conditioner multi-unit unit includes: at least two parallel indoor units, one or more parallel outdoor units, and refrigerant flow connecting pipes between the outdoor unit and each indoor unit. Each indoor unit contains an electronic expansion valve and an indoor heat exchanger. One end of the electronic expansion valve is connected to the exhaust pipe of the outdoor compressor through a refrigerant flow pipe, and the other end of the electronic expansion valve is connected to one end of the indoor heat exchanger. The other end of the indoor heat ex...

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Problems solved by technology

[0005] The object of the present invention is to provide a control method, device, storage medium and multi-connection system for the above-mentioned defects, so as to solve the problem that the multi-connection unit of the air conditioner with high-load heating operation needs to operate indoors when the heating load changes. The machine is easy to be shut down by overload protection, which affects the reliability of the operation of the air conditioner multi-connected unit, and achieves the effect of improving the operation reliability of the air conditioner multi-connected unit

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