Multi-split machine system, oil return control method and device thereof, storage medium and processor

Abstract

The invention discloses an oil return control method and device of a multi-split machine system, the multi-split machine system, a storage medium and a processor. The method comprises the steps: obtaining the accumulated operating time of each operating internal unit in the multi-split machine system under the condition that the multi-split machine system operates; determining whether one or moreoperating internal units in the multi-split machine system reach a set oil return condition or not according to the accumulated operating time of each operating internal unit in the multi-split machine system; under the condition that the one or more running indoor units in the multi-split machine system reach the oil return condition, determining the internal units needing oil return in all the indoor units in the multi-split machine system; and controlling the internal units needing oil return to return oil according to the determined internal units needing oil return. According to the scheme, oil return is conducted on the indoor units meeting the oil return condition, so that the output capacity requirement of a compressor is reduced, and the oil return energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of multi-line technology, and in particular relates to a multi-line system oil return control method, device, multi-line system, storage medium and processor, and in particular to a multi-line high-efficiency oil return control method, device, and multi-line system , storage media and processors. Background technique [0002] A multi-connected central air conditioner refers to an air conditioning system in which one outdoor unit is connected to two or more indoor units through piping, that is, a multi-connected system. Multi-connection systems are increasingly widely used in small and medium-sized buildings and some public buildings. [0003] In related schemes, after some multi-connected system units have been running for a period of time, the refrigeration oil needs to be recovered from the pipelines and indoor units of the multi-connected system to prevent the compressor from being damaged or burned due to lack of...

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Problems solved by technology

[0005] The object of the present invention is to provide an oil return control method, device, multi-line system, storage medium and processor for a multi-line system, so as to solve the problem of returning oil to all internal units indiscriminately when the multi-line system returns oil, so that The demand for output capacity of the compressor is large, which causes the problem of energy waste. By returning oil to the internal unit that meets the oil return conditions, the output capacity demand of the compressor is reduced and the energy consumption of oil return is saved.

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