Multiple compressor variable volume outdoor unit for one driven multiple air conditioner

Abstract

The present invention relates to the field of air conditioner technology. The outdoor unit consists of compressor, non-return valve, oil separator, four way change valve, heat exchange with fan and motor, drier and electronic expanding valve, vapor-liquid separator and air-liquid pipeline. The compressor consists of one variable frequency compressor and several fixed frequency compressors with all the air intake pipe being connected directly to the vapor-liquid separator and all the exhaust pipe being connected to the total exhaust pipe and the oil separator. The oil back pipe of the oil separator is connected to the inlet pipe of the vapor-liquid separator and may have serially connected filter. The present invention has low production, installation and use cost and high reliability.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and more specifically relates to a multi-compressor variable-capacity outdoor unit for an improved outdoor unit of an air-conditioning system. Background technique [0002] There are generally two types of configurations for the existing outdoor units of one-to-many air conditioners. One is a common configuration with only one inverter compressor, and the other is a dual-machine configuration with an inverter compressor and a fixed frequency compressor. In the former case, its capacity adjustment range is small, and one outdoor unit can drag 2 to 3 indoor units at most; and because one variable frequency compressor needs to drive multiple indoor units, the cylinder often occurs due to insufficient lubricating oil. Faults such as napping, shaft holding, and cylinder jamming will affect the normal operation of the compressor in the slightest, and damage the compres...

AI Technical Summary

Problems solved by technology

In the former case, its capacity adjustment range is small, and one outdoor unit can drag 2 to 3 indoor units at most; and because one variable frequency compressor needs to drive multiple indoor units, the cylinder often occurs due to insufficient lubricating oil. Faults such as napping, shaft holding, and cylinder jamming will affect the normal operation of the compressor in the slightest, and damage the compressor in severe cases.

In the latter case, the two compressors are independent of each other, which increases the production cost, installation cost and use cost of the outdoor unit

At the same time, due to the difference in the return air pressure of the two compressors, the oil level will be unbalanced, which will cause one of the compressors to be damaged due to lack of oil.

[0003] The purpose of the present invention is to overcome the above shortcomings and deficiencies, to provide an energy-saving, low production, installation and use costs, a large capacity adjustment range, and can effectively avoid cylinder pulling, shaft holding, etc. caused by insufficient lubricating oil. The multi-compressor variable-capacity outdoor unit of a multi-compressor air conditioner can ensure the normal operation of the compressor and improve its reliability.

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