Multi-split refrigerating system control method and device, multi-split refrigerating system and air conditioner

Abstract

The invention discloses a multi-split refrigerating system control method and device, a multi-split refrigerating system and an air conditioner, and belongs to the field of multi-split refrigerating system control. The control method comprises the steps that electronic expansion valve adjusting information corresponding to each indoor unit is obtained; and the compressor frequency value of an outdoor unit is adjusted according to the electronic expansion valve adjusting information. According to the scheme, the the compressor frequency of the outdoor unit is adjusted according to the electronic expansion valve adjusting information of the indoor units; the electronic expansion valve opening degrees of the indoor units of the refrigerating system and the compressor frequency of the outdoor unit are adjusted synchronously, and the refrigerating system can quickly reach a stable state; even if the environment fluctuates frequently, the stable state can be quickly achieved due to synchronous adjustment; and the adjusting time is saved, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the control field of one-to-multiple refrigeration systems, in particular to a control method and device for one-to-multiple refrigeration systems, a one-to-multiple refrigeration system and an air conditioner. Background technique [0002] like figure 1 As shown, the existing one-to-multi-refrigeration system is usually composed of an outdoor unit and multiple indoor units. There is no communication between the indoor and outdoor units, and the indoor and outdoor units are controlled according to the set parameters. Specifically, the frequency conversion outdoor The operating frequency of the compressor is controlled by the difference between the target evaporation pressure, and the internal unit of the electronic expansion valve uses the difference between the superheat degree and the target superheat degree to control the opening of the electronic expansion valve, adjust the flow rate and then control the flow rate of the re...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a control method and device for a one-to-multiple refrigeration system and a one-to-multiple refrigeration system and an air conditioner to solve the problem that the internal and external units are independently adjusted. If the system operating environment fluctuates frequently, it is difficult to adjust the internal and external units. Reaching a steady state, the problem of high energy consumption of the system

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