Reliable oil return air conditioning unit and its control method

An air-conditioning unit and control method technology, applied in refrigerators, compressors, refrigeration components, etc., can solve problems such as abnormal oil return, and achieve the effects of small resistance loss, high energy efficiency ratio, and reduction of refrigeration oil

Active Publication Date: 2021-06-01
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0003] In order to solve the technical problem of abnormal oil return in the parallel unit in the prior art when operating at part load, an oil return oil return system is provided that divides the compressor into multiple groups and sets up multiple oil separators for one-to-one correspondence to ensure the effect of oil separation Reliable air conditioning unit and control method

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  • Reliable oil return air conditioning unit and its control method

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] Such as figure 1 The shown air conditioning unit includes multiple compressors 1 and N oil separators 2, all of the compressors 1 are arranged in parallel, and all of the compressors 1 are divided into N groups of compressor units 3, and each group of the compressor units All the compressors 1 in 3 form an oil separation and recovery cycle with one oil separator 2, and a bypass pipeline 4 is set between any two oil separators 2, N≥2, that is, even All the compressors 1 in the same compressor group 3 are connected to an oil separator 2 to separate and recover the refrigerated oil, so as to e...

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Abstract

The invention provides an air conditioner unit with reliable oil return and a control method. The air conditioner unit includes a plurality of compressors and N oil separators, all the compressors are arranged in parallel, and all the compressors are divided into N groups of compressor units. The air conditioner unit and control method with reliable oil return provided by the present invention divide multiple compressors into N groups and set up N oil separators to ensure effective oil separation flow rate and oil separation efficiency when the unit is operating at partial load, thereby reducing The refrigerated oil entering the air-conditioning unit improves the heat exchange efficiency of the air-conditioning unit and the stability of the oil separation and recovery cycle. Compared with the dual oil separation system with series check valves in the prior art, the resistance loss is smaller, the energy efficiency ratio is higher, and the bypass pipeline can Balance the oil level in the oil separator, and at the same time ensure that the compressor unit in the air conditioning unit can operate independently to ensure the stability of the system.

Description

technical field [0001] The invention relates to the technical field of air treatment equipment, in particular to an air conditioner unit with reliable oil return and a control method. Background technique [0002] Parallel units are generally composed of multiple compressors, oil separators, economizers, oil coolers, gas collection tanks, liquid receivers, and electric control boxes installed on the same frame, and matched with relevant piping components to form a unit. Its multiple compressors share an oil separator, a liquid receiver, and a gas collection tank to form a parallel compression system. However, the oil separator is designed and selected according to the full-load flow rate. When the exhaust flow rate drops, the oil separation efficiency of the oil drops significantly, especially the oil separation efficiency in the spin separation and collision sections drops significantly, and there is a problem of abnormal oil return of the unit. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00F25B43/02F25B43/00F25B49/02
CPCF25B31/004F25B43/003F25B43/02F25B49/02
Inventor 罗炽亮龙忠铿马宁芳练浩民卢志辉
Owner GREE ELECTRIC APPLIANCES INC
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