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Compressor system oil equalization control method and multi-compressor parallel system

A compressor system and control method technology, applied in compressors, compressors, irreversible cycle compressors, etc., can solve problems such as high process requirements, difficult piping, lack of phase angle control, etc., to solve complex manufacturing processes, Effect of Simplified Piping Design

Active Publication Date: 2016-01-06
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method usually brings several problems: First, the pipeline structure is complex and the design difficulty increases
For a system with a small shell, it is more difficult to route the pipes and has higher requirements on the process
Secondly, lack of phase angle control, even if the compressor operates at the same frequency, in a compression cycle, due to the phase angle difference, the suction load will be different, thus affecting the oil return balance

Method used

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  • Compressor system oil equalization control method and multi-compressor parallel system
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  • Compressor system oil equalization control method and multi-compressor parallel system

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Embodiment Construction

[0048] Embodiments of the compressor system oil equalization control method of the present invention, such as figure 2 , Figure 4 shown.

[0049] The oil equalization control method of the compressor system of the present invention comprises the following steps:

[0050] Set up N rotary compressors connected in parallel;

[0051] Start the N1 compressors 1 in the N parallel-connected rotary compressors to run simultaneously;

[0052] Detecting the phase angles of the motor rotors of the N1 compressors;

[0053] Determine whether the phase angles of the motor rotors of the N1 compressors are consistent; if they are consistent, run the routine operation control program to control the operation of the N1 compressors 1; if not, adjust the phase angles of the motor rotors of the N1 compressors so that After the phase angles are consistent, run the routine operation control program to control the operation of the N1 compressors 1;

[0054] N and N1 are integers greater than 1...

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Abstract

The invention discloses an oil-equalizing control method for a compressor system and a multi-compressor parallel system. The method comprises the following steps: arranging N parallel rotor compressors; starting N1 compressors for simultaneously running; detecting phase angles of motor rotors of N1 compressors; judging if the phase angles of motor rotors of N1 compressors are consistent; if yes, running a conventional running control program for controlling the running of the N1 compressors; if not, adjusting the phase angles of motor rotors of N1 compressors and adopting the conventional running control program for controlling the running of the N1 compressors after the phase angles are consistent. According to the invention, the oil-equalizing problem between the compressors in the multi-compressor parallel system is solved; the phenomenon of compressor damage caused by long-term oil shortage of the compressors in the multi-compressor parallel system is avoided; the pipeline design is simplified; the problem of complex manufacturing technique caused by redundant pipelines is solved.

Description

technical field [0001] The invention relates to the technical field of oil equalization in a compressor system, in particular to a method for controlling oil equalization in a compressor system and a multi-compressor parallel system. Background technique [0002] At present, most systems with multiple compressors running in parallel use oil equalizing pipes to achieve oil equalization between compressors to ensure oil level balance in the compressors. However, this method usually brings several problems: First, the pipeline structure is complex and the design difficulty increases. For a system with a small shell, it is more difficult to route the pipes, and the process requirements are higher. Secondly, lack of phase angle control, even if the compressors operate at the same frequency, in a compression cycle, due to the phase angle difference, the suction load will be different, thus affecting the oil return balance. Contents of the invention [0003] Based on this, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00F25B49/02F25B1/10
Inventor 沈军胡锐禤祺
Owner GREE ELECTRIC APPLIANCES INC
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