Oil balancing and returning air conditioning unit and control method thereof

An air-conditioning unit, oil return control technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problem of uneven oil distribution, achieve uniform oil distribution, solve oil distribution, and solve oil level imbalance Effect

Active Publication Date: 2017-02-22
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect of uneven oil distribution in the modular air-conditioning unit in the prior art, thereby providing an oil-returning air-conditioning unit and its control method

Method used

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  • Oil balancing and returning air conditioning unit and control method thereof
  • Oil balancing and returning air conditioning unit and control method thereof
  • Oil balancing and returning air conditioning unit and control method thereof

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Experimental program
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specific Embodiment approach

[0095] 1. Compressor rotation control

[0096] 1) The opening capacity of the internal unit is small, and the unit always operates with a single compressor;

[0097] After the unit starts normally, the first compressor 101 starts first. When the running time of the unit is equal to t1, the frequency of the first compressor 101 is reduced, and the second compressor 102 is started. When the continuous running time of the unit reaches t1+t2, the first The compressor 101 stops, and the second compressor 102 continues to run, which is recorded as the first period, and the time t is reset to zero. When the running time of the unit reaches t1 again, the frequency of the second compressor 102 is reduced, and the first compressor 101 is started. When the continuous running time of the unit reaches t1+t2, the No. 2 compressor stops and the No. 1 compressor continues to run; for the second cycle. And so on and on.

[0098] 2) The opening capacity of the internal unit is relatively lar...

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Abstract

The invention provides an oil balancing and returning air conditioning unit and a control method thereof. The oil balancing and returning air conditioning unit comprises outdoor units (201, 202, 203, 204) and indoor units (301, 302, 303, 304), each outdoor unit comprises more than two compressors (101, 102) which are arranged in parallel, air suction pipes (401,402) of each of the compressors are converged and connected to a gas-liquid separator (5), and exhaust pipes (601, 602) of each of the compressors are converged and connected to an oil separator (7), wherein each compressor is also provided with oil balancing holes (801, 802) used for discharging oil inside the compressor and oil balancing pipes (901, 902) connected with the oil balancing holes, and the oil balancing pipes of each of the compressors are converged and connected to a refrigerant outlet end of the oil separator (7). By using the oil balancing and returning air conditioning unit, oil in the compressors which are rich in oil can be effectively and uniformly distributed into each compressor and each outdoor unit through the oil balancing pipes, so that the problems of oil quantity distribution nonuniformity and oil level unbalance are solved.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning, and in particular relates to an oil-returning air-conditioning unit and a control method thereof. Background technique [0002] The compressor is the "heart" of the air conditioner. When the compressor is working, there is a lot of friction inside. In order to ensure the reliable operation of the compressor and improve the performance of the compressor, lubrication is one of the important links, so the lubricating oil has a great impact on the compressor. Lubricating oil has the functions of lubricating, cooling and sealing the compressor. Moreover, the compressor requires a certain amount of lubricating oil. If there is too little lubricating oil in the compressor, the lubrication will be insufficient, and the compressor will be damaged. Therefore, a certain amount of oil storage is the most basic condition to ensure the reliable operation of the compressor. Only when the oil storage e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B43/02
CPCF25B43/02
Inventor 杨健胡强沈军卢景斌于艳翠王永立游劭磊胡锐杨玉生
Owner GREE ELECTRIC APPLIANCES INC
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