Indoor unit, air conditioning system and control method

Abstract

The embodiment of the present invention discloses an indoor unit, an air-conditioning system and a control method, which relate to the technical field of air-conditioning and can solve the problem that the refrigerant cannot return to compression in time when the pipeline between the indoor unit and the outdoor unit is long in the prior art. In the machine, the air conditioning system cannot be started normally. The specific solution is: the liquid collecting solenoid valve is used to close when the indoor machine is turned off, so that part of the refrigerant discharged from the compressor and passing through the liquid collector is stored in the liquid collector; The refrigerant in the liquid collector; the liquid return solenoid valve is used to control the flow of refrigerant from the outdoor unit to the liquid collector; the liquid collection solenoid valve is also used to open when the indoor unit is turned on, so that the refrigerant in the liquid collector passes through the liquid collection solenoid valve , and then through the throttling device and evaporator, back to the compressor. The invention is used for compressor startup.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an indoor unit, an air conditioning system and a control method. Background technique [0002] In the computer room where various computers and other electronic equipment are stored, a split air-conditioning system is usually used for cooling, so as to provide a constant temperature working environment for the electronic equipment in the computer room. Among them, the split type air conditioning system is an air conditioning system in which the outdoor unit and the indoor unit are connected through long pipelines. At present, for the air conditioning system in the building, most of the machine rooms are set in the middle of the building. In order to meet the requirements of urban planning and beauty, the outdoor unit is usually installed on the top floor of the building, which will make the pipeline between the indoor unit and the outdoor unit too long. Such as figure ...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an indoor unit, an air-conditioning system and a control method, which can solve the problem that the refrigerant cannot return to the compressor in time when the pipeline between the indoor unit and the outdoor unit is long in the prior art. Problems preventing the air conditioning system from starting properly

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