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Continuative energy regulation control method of single-screw compressor

A single-screw compressor, energy regulation technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of poor adaptability and difficulty, and achieve the effect of small overshoot

Inactive Publication Date: 2015-03-11
JIANGSU CHUNLAN POWER MFG
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] At present, almost all screw chillers are controlled by conventional control methods, such as segmental control, trend control, etc., which have poor adaptability to working conditions and water temperature changes during annual operation. How to quickly adjust the energy of screw chillers Investment to meet the requirements of the total outlet water temperature has become an urgent problem to be solved
Moreover, the air conditioning system is a nonlinear system with multiple inputs and multiple outputs, time-varying parameters, pure lag, and large inertia. Its control process is closely related to many factors such as the surrounding environment, the air conditioning system itself, and user-side loads. The control method solves the above problems

Method used

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  • Continuative energy regulation control method of single-screw compressor

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Embodiment 1

[0015] Embodiment 1, the present invention provides a single-screw compressor stepless energy regulation control method, which includes the following steps: first adopt fuzzy control, divide the temperature control zone into a loading zone, a holding zone, and an unloading zone, and take the temperature control cycle as Unit, to judge which area the temperature is in, and decide whether to load or unload according to the area where it is located. The loading or unloading speed is calculated by the temperature difference control method. The pulse interval time is used to realize the adjustable loading / unloading speed. The loading / unloading pulse time remains unchanged. The smaller the loading / loading pulse interval time, the faster the speed. The algorithm of the temperature difference control method is: output loading pulse interval = maximum loading Interval - [ (current temperature - set temperature - control temperature difference) × (maximum loading interval - minimum loadi...

Embodiment 2

[0016] Embodiment 2, the present invention provides a stepless energy regulation control method for a single screw compressor, which includes the following steps: first adopt fuzzy control, divide the temperature control zone into a loading zone, a holding zone, and an unloading zone, and take the temperature control cycle as The unit judges which area the temperature is in, and decides whether to load or unload according to the area where it is located. The loading or unloading speed is calculated using the PID control method. To adjust the energy level to meet the requirements of the outlet water temperature, the algorithm of the PID control method is:

[0017] Number of output loading and unloading pulses = A×e(3)-B×e(2)+C×e(1);

[0018] Where A=proportional gain×(1+sampling period / integration time+differential time / sampling period);

[0019] B=proportional gain×(1+2×differential time / sampling period);

[0020] C=proportional gain×differential time / sampling period;

[00...

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Abstract

The invention discloses a continuative energy regulation control method of a single-screw compressor. The method comprises the following steps: firstly, a temperature control area is divided into a loading area, a maintaining area and an unloading area by using fuzzy control; in which area the temperature is located is determined by using a temperature control period as a unit and whether loading or unloading is performed is determined according to the located area; and finally, a compressor with the shortest operation time is selected for prior operation, and a compressor with the longest operation time is unloaded, so that all compressors are operated evenly. The method not only can enable a set to quickly reach a set temperature through the fuzzy control method with small overshoot, but also can stabilize a water outlet temperature in a certain range.

Description

technical field [0001] The invention relates to a stepless energy regulation control method of a single screw compressor. Background technique [0002] At present, almost all screw chillers are controlled by conventional control methods, such as segmental control, trend control, etc., which have poor adaptability to working conditions and water temperature changes during annual operation. How to quickly adjust the energy of screw chillers Input to meet the requirements of the total outlet water temperature has become an urgent problem to be solved. Moreover, the air conditioning system is a nonlinear system with multiple inputs and multiple outputs, time-varying parameters, pure lag, and large inertia. Its control process is closely related to many factors such as the surrounding environment, the air conditioning system itself, and user-side loads. The control method solves the above-mentioned problems. Contents of the invention [0003] The invention provides a single-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/022F25B2600/02F25B2600/027
Inventor 翁义师铎许明春
Owner JIANGSU CHUNLAN POWER MFG
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