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Oil return control method and device of multi-split air conditioner and air conditioner

An oil return control and air conditioner technology, which is applied to compressors, refrigerators, refrigeration components, etc., can solve the problem of inaccurate judgment, achieve good oil return effect, accurately judge the timing of oil return, and reduce energy waste.

Active Publication Date: 2019-10-01
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem to be solved by the present invention is that the existing judgment on the execution timing of the oil return operation based on the compressor frequency and running time is not accurate enough

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  • Oil return control method and device of multi-split air conditioner and air conditioner
  • Oil return control method and device of multi-split air conditioner and air conditioner
  • Oil return control method and device of multi-split air conditioner and air conditioner

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Embodiment Construction

[0063] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In this article, "first", "second", "third", "fourth", "fifth" and "sixth" are only used to refer to different objects, and there is no distinction between advantages and disadvantages, and there is no other special meaning.

[0064] The multi-connected air conditioning system has multiple indoor units, and each indoor unit is equipped with an expansion valve in the liquid inlet pipe. When the indoor unit is not opened, the corresponding expansion valve will be closed. When the number of opened indoor units accounts for a large proportion (here, the proportion refers to the proportion of the number of opened indoor units to the total number of indoor units, and the proportion of the number of closed indoor units to the total number of indoor ...

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Abstract

The invention provides an oil return control method and device of a multi-split air conditioner and the air conditioner. The oil return control method of the multi-split air conditioner comprises thesteps of detecting the number of started indoor units in the air conditioner; judging whether the air conditioner has the risk of oil shortage or not based on the number of the started indoor units; and if yes, judging whether the air conditioner meets the oil return condition or not, and executing the oil return operation when the air conditioner meets the oil return condition. According to the oil return control method and device of the multi-split air conditioner and the air conditioner, irregular oil return can be achieved, and a better oil return effect can be obtained.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to an oil return control method for a multi-connected air conditioner, an oil return control device and an air conditioner. Background technique [0002] The compressor is one of the most important components of the refrigeration system. Lubricating oil is a substance that lubricates the moving parts in the compressor. It is dissolved in the refrigerant and flows with the refrigerant in the internal and external machine system pipelines. Lubricating oil can form an oil film between the friction surfaces of the moving parts in the compressor, thereby reducing friction, friction heat and wear of parts, thereby improving the reliability, durability and efficiency of the compressor. [0003] Considering that if the compressor has been running at low frequency, the flow rate in the pipeline of the multi-split air conditioning system will be insufficient, and it will be d...

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Application Information

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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/02
Inventor 侯丽峰秦宪赵攀汪云强贾宝莹
Owner NINGBO AUX ELECTRIC