Constant-temperature and constant humidity store house variable capacity automatic controlling system

An automatic control system, constant temperature and humidity technology, applied in the field of constant temperature storage control, can solve problems such as poor adaptability, achieve the effects of convenient operation, excellent control quality, and significant energy saving effect

Inactive Publication Date: 2009-01-21
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it needs to know the mathematical model of the control object, and the adaptability is poor

Method used

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  • Constant-temperature and constant humidity store house variable capacity automatic controlling system
  • Constant-temperature and constant humidity store house variable capacity automatic controlling system
  • Constant-temperature and constant humidity store house variable capacity automatic controlling system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0020] In the present invention, the combined variable capacity control of the compressor and the air cooler is adopted. In the choice of control strategy, PLC is a kind of industrial computer, which realizes various control purposes through user editing programs. It has the advantages of high reliability, simple programming and easy maintenance, and has been widely used in industrial control. This system uses Siemens S7-300 medium-sized PLC as the controller to realize intelligent control of the whole unit, achieving the dual purpose of energy saving and optimal control. System control mainly includes: parameter control, safety control, automatic operation control and defrosting control.

[0021] In the present invention, the fuzzy control theory based on the language rule model is combined with the neural network theory with self-learning and arbitrary...

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Abstract

A transfiguration automatic controlling system of the constant-temperature constant-humid warehouse that belongs to the constant-temperature warehouse controlling field, which provides the energy conservation and optimizing control to the constant-temperature constant-humid warehouse transfiguration automatic controlling system. The invention is: the collecting equipment that collects the operating parameter of the unit and transmits to the controller, the controller processes modulus transform for the operating parameter, according to the controlling strategy to get the operating result by the arithmetic and the Boolean calculation, processes the modulus transform for the operating parameter and outputs to the processor, decides the controlling strategy and processes the processor constitution of the corresponding act according to the computing result.

Description

technical field [0001] The invention belongs to the field of constant temperature storage control, in particular to an automatic control system for variable capacity of a constant temperature and humidity storage. Background technique [0002] Relevant statistics show that the compressor accounts for 60% of the power consumption of the refrigeration system, and the air cooler accounts for 25%. The design working condition of the refrigeration device is the most unfavorable working condition with the largest cooling loss. However, in most cases the system operates under partial load, and the potential for energy saving is large. At the same time, the control precision of the traditional two-position relay control system is low. As an end user, the fresh-keeping warehouse requires a good (constant temperature and humidity) storage environment to keep the fruit fresh and save energy as much as possible. At present, the control of the constant temperature and humidity storage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/02
Inventor 杨昭徐晓丽金国民孙乐川
Owner TIANJIN UNIV
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