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Speed regulation control method of variable frequency fan for optimizing efficiency of refrigerating system

A control method and technology for a refrigeration system, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of not reaching a high level of accuracy, inability to achieve optimal refrigeration efficiency, and large loss, etc. Speed ​​regulation, the effect of optimizing the efficiency of the refrigeration system

Inactive Publication Date: 2020-01-31
WUXI VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the accuracy of the control method for fan speed adjustment has not reached a high level. During the operation of the fan, the cooling efficiency cannot reach the optimal state, and the loss generated during the system operation is relatively large.

Method used

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  • Speed regulation control method of variable frequency fan for optimizing efficiency of refrigerating system
  • Speed regulation control method of variable frequency fan for optimizing efficiency of refrigerating system
  • Speed regulation control method of variable frequency fan for optimizing efficiency of refrigerating system

Examples

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Embodiment 1

[0027] Example 1: A speed regulation control method of a variable frequency fan that optimizes the efficiency of the refrigeration system. The schematic diagram of the refrigeration system is as follows figure 1 with figure 2 As shown, if the compressor is a variable frequency compressor, the compressor uses a variable frequency drive to start and control, the compressor variable frequency starter communicates with the main board, and the compressor speed signal is used as the communication between the main board and the compressor variable frequency starter The signals are transmitted to each other; the fan is a variable frequency fan, and the fan inverter is used to start and control the fan speed. The fan inverter communicates with the main board, and the fan speed signal is transmitted as a communication signal between the main board and the compressor inverter cabinet. The main board collects the compressor speed signal output by the compressor frequency conversion cabin...

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Abstract

The invention discloses a speed regulation control method of a variable frequency fan for optimizing efficiency of a refrigerating system. The technical scheme is characterized in that (1) for a variable frequency driven compressor, the rotating speed Vrun _ comp (Hz or rpm) of the compressor is adopted as an input parameter, and for a compressor with a slide valve position indicating device, thefan speed fs _ un _ Hz of the variable frequency fan is determined based on the rotating speed (Hz or rpm) of the compressor or the load percentage Vrun _ comp (%) of the compressor according to the load percentage Vrun _ comp (%) of the compressor as an input parameter; (2) the fan speed fs _ un _ Hz and the rotating speed (Hz or rpm) of the compressor or the load percentage Vrun _ comp (%) of the compressor are associated by adopting a simplest linear formula; (3) the relation between the fan speed fs _ un _ Hz and the rotating speed (Hz or rpm) of the compressor or the load percentage Vrun_ comp (%) of the compressor is defined by adopting a fan speed function fs _ EQ and a load factor f _ coil _ load, so that the efficiency of the refrigerating system is optimal when the fan operatesat the rotating speed; and (4) in the fan speed function fs _ EQ, the fan speed fs _ un _ Hz is in direct proportion to the rotating speed of the compressor.

Description

technical field [0001] The invention relates to the technical field of a speed regulation control method for a refrigeration system, in particular to a speed regulation control method for a variable frequency fan that optimizes the efficiency of the refrigeration system. Background technique [0002] The most basic refrigeration system includes a compressor, an evaporator, and a condenser. A frequency conversion fan is installed on the condenser, and the fan is driven by a frequency converter. The fan frequency converter outputs the power supply of a given frequency to the fan, and the speed of the fan is different under the uneven frequency. In the prior art, the precision of the control method for adjusting the speed of the fan is not high enough. During the operation of the fan, the refrigeration efficiency may not reach the optimal state, and the loss generated during the operation of the system is relatively large. [0003] Therefore, it is necessary to propose a contr...

Claims

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Application Information

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IPC IPC(8): F25B49/02
CPCF25B49/02
Inventor 商萍君朱倩任重威陈利军
Owner WUXI VOCATIONAL & TECHN COLLEGE
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