Method and device for control on air conditioner cold water system based on tail end cold quantity active adjustment

A technology of a cold water system and a control method, which is applied in the directions of heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as difficulty in solving service quality requirements for cold water system operation and energy consumption.

CN103411293AInactive Publication Date: 2013-11-27天津市通乾机电设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-11-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and a device for control on a central air conditioner cold water system based on tail end cold quantity active adjustment. The method comprises the following steps of when a system control strategy of an adjusting type temperature control value is adopted, firstly finding a tail end branch corresponding to the opening instruction maximum value Kmax of the adjusting type temperature control valve; then, enabling a central controller to control a frequency converter to synchronously adjust the rotation speed of an in-service cold water circulating pump, and then adjust and control the water supply pressure and flow quantity of the cold water system; and when the system control strategy of an on-off type temperature control valve is adopted, finding the maximum value of the valve opening instruction signal statistical value of an air conditioner room temperature controller in the system through comparing and calculation by the central controller, and judging if the system water pump needs to run at increased frequency or decreased frequency according to if the average value of n sampling arithmetic values is equal to 1 or not. The method has the advantages that through the analysis of the control strategy of the water pump of the existing air conditioner cold water system, the central controller adopts a comparing and control algorithm to control the state of the in-service water circulating pump in real time, the economic running of the cold water system of the central air conditioner system is realized, and the obvious energy-saving effect is realized.
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Description

technical field

[0001] The invention relates to a control method of a centralized air-conditioning cold water system, in particular to a control method and device for a centralized air-conditioning cold water system based on the active adjustment of terminal cooling capacity. Background technique

[0002] Article 5.3.2 of the current national standard GB50155-92 "Heating Ventilation and Air Conditioning Terminology Standards" defines the air conditioning system that centrally processes, transports and distributes air as a central air conditioning system, commonly known as a central air conditioning system. It has been widely used in modern civilized society. It has become one of the facilities with the largest energy consumption in modern buildings and industrial production. The development, research and innovative application of its energy-saving operation control technology and devices have received extensive attention worldwide.

[0003] The determination of the control ...

Examples

Embodiment Construction

[0043] In order to understand the present invention more clearly, describe the present invention in detail in conjunction with accompanying drawing and embodiment:

[0044] The principle of the centralized air-conditioning cold water system control device based on the active adjustment of the terminal cooling capacity provided by this embodiment is as follows: figure 1 Shown: The controlled components include: refrigeration unit (2), variable frequency speed regulation circulating cold water pump (7); terminal air conditioning unit (3) and adjustable temperature control valve (5); terminal fan coil unit (4) and on-off Type temperature control valve (6); end branch static balance valve (1).

[0045] The centralized air-conditioning and chilling water system control device based on the active adjustment of terminal cooling capacity for realizing the method includes a central controller (10), a plurality of DDC controllers (8) with network communication functions, and a plurali...