Air conditioning system and its control method and device, storage medium

Abstract

The present invention proposes an air conditioning system, its control method and device, and storage medium. The refrigerant inlet of each indoor unit is provided with a first electronic expansion valve. The outdoor unit includes an outdoor heat exchanger and a first compressor. For compressing the first cold medium, the second compressor of the hydraulic module is used to compress the second cold medium, and the outlet of the outdoor heat exchanger is connected to the inlet of the first cold medium of the first heat exchanger. The control method includes the following steps: identification The air conditioning system is mainly in cooling operation, and the indoor unit in heating operation is used as a candidate indoor unit; the condensation temperature of the candidate indoor unit is detected, and the candidate indoor unit with insufficient heating capacity is obtained according to the condensation temperature; the candidate indoor unit with insufficient heating capacity As the target indoor unit, and perform heating protection for the target indoor unit; control the second compressor to reduce to a preset frequency and control the second electronic expansion valve to reduce to a preset opening to ensure the heating capacity of the heating indoor unit.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to an air conditioning system, a control method and device thereof, and a storage medium. Background technique [0002] Compared with the traditional heat pump system, the three-pipe heat recovery system can realize that the indoor units in the same system can cool and heat at the same time, without mode conflict. However, the problem in the related technology is that in the main cooling mode, the hydraulic module and the heating inner unit are also used as condensers. Therefore, unreasonable refrigerant distribution is prone to occur, resulting in poor heating effect of the inner unit. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. [0004] Therefore, the first purpose of the present invention is to provide a control of the air conditioning system to ensure the...

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Problems solved by technology

However, the problem in the related technology is that in the main cooling mode, the hydraulic module and the heating internal unit are also used as condensers. Therefore, unreasonable refrigerant distribution is prone to occur, resulting in poor heating effect of the internal unit.

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