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

Abstract

The invention discloses a control method and device of a multi-split system, a storage medium and the multi-split system. The method comprises the steps of determining whether the multi-split system is in the load conversion stage or not; if the multi-split system is in the load conversion stage, determining whether the coil pipe temperature of an operation inner unit in the multi-split system islarger than or equal to the upper limit of the set heating overload temperature range or not; if the coil pipe temperature of the operation inner unit in the multi-split system is larger than or equalto the upper limit of the set heating overload temperature range, controlling the opening degree of a refrigerant throttling device of a shutdown inner unit of the multi-split system, and enabling arefrigerant which should partly flow into the operation inner unit to be changed to flow to the shutdown inner unit and then flow back to an outdoor heat exchanger of the multi-split system. Due to the scheme, the problem that in the heating load conversion process of the air conditioner multi-split unit, the operation indoor unit is prone to overload, protection shutdown is caused, and operationreliability is affected is solved. The effect of improving the operation reliability is achieved.

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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