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Central air conditioning variable frequency energy saving control method

An energy-saving control and central air-conditioning technology, applied in heating and ventilation control systems, heating methods, space heating and ventilation, etc., can solve problems such as deviations in analog quantity settings, and achieve extended average service life, high sampling accuracy, and temperature good control effects

Inactive Publication Date: 2007-02-14
宁波华普工业控制技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN01107645.3 proposes a central air-conditioning intelligent energy-saving system, which adopts programmable logic controller PLC, controlled by expert experience knowledge base, only detects the change of water temperature and air temperature, the deviation of analog quantity setting and independent frequency conversion debugging make the working point of the pump far away from the Optimum state, etc. affect energy saving effect

Method used

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  • Central air conditioning variable frequency energy saving control method
  • Central air conditioning variable frequency energy saving control method
  • Central air conditioning variable frequency energy saving control method

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Embodiment Construction

[0025] figure 2 for in figure 1 Based on the existence of the structure, the main control program flow chart of this embodiment is supported to realize the algorithmic control strategy of the present invention. The specific description is as follows: after the system is started, the whole system is initialized (such as step 101), and the ambient temperature, evaporator pressure and system status are collected (steps 102, 103), and the output control frequency of cooling water and chilled water is calculated (step 104) According to the calculated frequency, it is judged whether to open (close) a cooling (freezing) water pump motor (steps 105, 107), if yes, then perform the corresponding operation (steps 106, 109), if not, then output the frequency converter Control frequency (step 109).

[0026] Based on the above control strategy, its subroutine can be realized by the following method:

[0027] After starting step 100, step 101 initializes the system, including ① for vario...

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Abstract

The present invention relates to a central air-conditioning frequency conversion energy-saving control method. Said invention adopts microcomputer main controller to execute a series of steps, and combines hardware structure with control software and utilizes frequency conversion to make the refrigeration system obtain optimum working state.

Description

technical field [0001] The invention relates to a control method for frequency conversion and energy saving of a central air conditioner, in particular to a control method for a central air conditioner of an absorption refrigerating machine with frequency conversion and energy saving. Background technique [0002] The power consumption of the central air-conditioning system generally accounts for more than 40% of the power consumption of the entire building, and the central air-conditioning unit is designed to meet the maximum cooling and heat of the place of use, and generally operates at a non-full load in practical applications. State; According to the annual and daily changes in the use of the central air-conditioning system, the central air-conditioning is operating at low efficiency most of the time. The best conversion efficiency of the heat exchanger is when the design temperature difference of the chilled water is 5-7°C, and the design temperature difference of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/00
Inventor 翁振涛曹建伟李勇王海虹
Owner 宁波华普工业控制技术有限公司