Oil balancing device and multi-split air conditioning system

Abstract

The invention discloses an oil balancing device which comprises an oil separator and an electromagnetic valve, wherein the oil separator is provided with a mixed liquor input end, a cooling medium output end, an oil back flow end and an oil balancing end; the oil balancing end is provided with an oil balancing isolating valve, and an oil balancing one-way valve is arranged between the oil balancing isolating valve and the oil separator; and one end of the electromagnetic valve is communicated with a parallel compressor unit, and the other end of the electromagnetic valve is communicated with the oil balancing one-way valve. When the lubricating oil in the individual air-conditioning equipment in a multi-split air conditioning system is excessive, the oil balancing device enables the excess lubricating oil to be sent to other air-conditioning equipment, and the distribution of lubricating oil of each air-conditioning equipment in the multi-split air conditioning system is more uniform; and in addition, an unloading valve is added so as to avoid that the booster danger is generated because of overhigh pressure in the oil balancing device under the occasion of working condition acute variation or bad transportation, and the reliability of the multi-split air conditioning system is improved. The invention further discloses the multi-split air conditioning system.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an oil balance device and a multi-connected air conditioning system. Background technique [0002] The multi-connected air-conditioning system is composed of multiple air-conditioning subsystems, which can realize the free combination of multiple outdoor units and multiple indoor units. The capacity of a multi-line system usually has ten horses or even dozens of horses. The pipeline of the multi-line system is complicated, and there are multiple compressors inside the module. The operating conditions of the compressors are different when the load is different. Some may be operating under high load while others may not be operating. In this case, the distribution of oil between compressors is likely to be unbalanced. Some compressors may have insufficient lubricating oil, and some compressors may have too much lubricating oil. This can easily cause damage to the compress...

AI Technical Summary

Problems solved by technology

The capacity of a multi-line system usually has ten horses or even dozens of horses. The pipeline of the multi-line system is complicated, and there are multiple compressors inside the module. The operating conditions of the compressors are different when the load is different. Some may be operating under high load while others may not be operating. In this case, the distribution of oil between compressors is likely to be unbalanced. Some compressors may have insufficient lubricating oil, and some compressors may have too much lubricating oil. This can easily cause damage to the compressor

[0003] The pipeline and control of the existing multi-line oil balance device are complex, and there is a closed section in the pipeline. When the working conditions change drastically or other harsh conditions, the oil balance pipe will burst, and the system reliability is low.

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