CN102192567A

CN102192567A - Energy-saving control system for central air conditioner

Info

Publication number: CN102192567A
Application number: CN2010101182136A
Authority: CN
Inventors: 方芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-05
Filing date: 2010-03-05
Publication date: 2011-09-21

Abstract

The invention relates to an energy-saving control system for a central air conditioner. The energy-saving control system comprises a sensor, a data acquisition module, an operation tendency analysis module, a drag system, an actuating mechanism, a stage feedback module and a man-machine interaction module, wherein the sensor and the data acquisition module perform unidirectional model transmission to the operation tendency analysis module, the state feedback module collects signals from the drag system and the actuating mechanism and unidirectionally transmits the collected signals to the operation tendency analysis module, the main-machine interaction module and the operation tendency analysis module are in a bidirectional signal transmission mode, the operation tendency analysis module unidirectionally transmits processed data commands to the drag system and the drag system unidirectionally transmits the processed data commands to the actuating mechanism. By adopting the control device, all parameters can be tracked and calculated at any time and can be set manually, thereby g cooling and heating load demands can be met as far as possible and the optimal coordinated operation of a whole system is realized.

Description

The energy-saving control device of central air-conditioning

Technical field

The present invention relates to central air conditioning plant, specifically, relate to a kind of energy-saving control device that is used for the comfort type central air-conditioning.

Background technology

During the comfort type central air-conditioning is used, central air-conditioning normally designs according to the maximum cold thermic load demand that building is installed when design selection, and leave 10% above surplus, even thereby in the environment of least favorable maximum cold thermic load, air-conditioning also has certain surplus.And the actual cooling and heating load demand of building is along with season, what change at any time with flow of the people round the clock, actual air conditioner cold-heat workload demand is low more than design (calculated) load in the overwhelming majority time, cooling and heating load is below 40% in some occasion, and performance indications under the general central air conditioner main machine sub-load and the performance indications under the full load differ greatly, the circulation operation temperature difference also is lower than 5 ℃～7 ℃ of the design temperature difference, annual most of running time, host work is under part throttle characteristics, the relative declared working condition of efficient conversion index is low more than 10%, and circulation is operated at big flow, work under the little temperature difference situation, cause the invalid circulation of system, not only wasted the conveying capacity of water pump operation, also cause main frame to do the part idle work, actually cause huge energy waste.

In sum, the cooling and heating load of design cooling and heating load and user's request can not be carried out dynamic optimum Match when there was operation in central air-conditioning unit of the prior art, even the water yield that some system adopts frequency converter to do recirculated water is regulated, but do not consider parameter and parameter rated load under and the energy efficiency indexes difference of main frame under sub-load, can not take into account main frame and circulation in the running, cause the main frame operational efficiency away from the high efficiency point, the excessive defective of invalid loss that causes central air conditioner main machine and chilled water pump, cooling water pump, blower fan to be in operation.

Summary of the invention

The objective of the invention is to invalid energy consumption height at the central air-conditioning existence, the deficiency of the wasting of resources, provide a kind of when operation according to local meteorological data, unit nominal parameter and actual operation parameters simulation trial, the prediction workload demand, generate load control curve and control the cooling and heating load demand that consumed power that central air conditioner system main frame, chilled water pump, cooling water pump, blower fan be in operation realizes best limit match user, be used for the energy-saving control device of comfort type central air-conditioning.

Technical scheme of the present invention is: a kind of energy-saving control device of central air-conditioning, comprise sensor and data acquisition module, operation trend analysis and Control module, dragging system, executing agency, the feedback of status module, human-computer interaction module, described sensor and data acquisition module transmit to the unidirectional model of carrying out of operation trend analysis and Control module, the feedback of status module is from dragging system, signal is collected by executing agency, and one-way transmission is given operation trend analysis and Control module, the two-way transmission signal of human-computer interaction module and operation trend analysis and Control module, operation trend analysis and Control module is given dragging system with the data command one-way transmission of handling well, gives executing agency by the dragging system one-way transmission again.

Preferably, described operation trend analysis and Control module comprises the feedback of status processing module of signal that accepting state feedback module 5 transmits, and the data-signal of feedback of status processing module processing is transferred to the signal conversion circuit of central processing unit; Signals collecting and preposing signal process circuit that the signal that the data acquisition module is gathered is handled, received signal collection and preposing signal process circuit are handled the signal condition module that the back signal is transferred to central processing unit; Operation trend analytic unit to central processing unit transmission signal; And data caching circuit, data processing unit, data storage cell, historical simulation curved unit that the collected signal of central processing unit is handled.

Preferably, described human-computer interaction module comprises the communication module and the man-machine interface of mutual transmission signal instruction, and human-computer interaction module is by the communication of MODBUS agreement.

Beneficial effect of the present invention is: owing to the present invention includes sensor and data acquisition module, operation trend analysis and Control module, dragging system, executing agency, the feedback of status module, human-computer interaction module, signal and real time execution parameter that described sensor and data acquisition module and described feedback of status module will be gathered from the central air conditioner system that described dragging system is controlled, history run parameter and the local meteorological data of importing from described human-computer interaction module, the relevant parameter of central air conditioner main machine carries out cooling and heating load requirement forecasting computational analysis, simulation load variations trend, the predictive user cooling and heating load, and generate the workload demand curve according to the efficiency variance under the host machine part load and the trend of actual motion load changing rate, and formation load control aircraft pursuit course, adjust the water system flow, emphasis is considered the running efficiency of high-power unit when adjusting, and self study and revise history curve when adjusting, therefore can mate the cooling and heating load demand as far as possible, realize the optimal coordination operation of whole system.

Description of drawings

Fig. 1 is a system of the present invention control structure schematic diagram.

The specific embodiment

Specific embodiments of the invention as shown in Figure 1,: a kind of energy-saving control device of central air-conditioning, it is characterized in that: comprise sensor and data acquisition module 1, operation trend analysis and Control module 2, dragging system 3, executing agency 4, feedback of status module 5, human-computer interaction module 6, described sensor and data acquisition module 1 transmit to the operation trend analysis and Control module 2 unidirectional models of carrying out, feedback of status module 5 is from dragging system 3, signal is collected by executing agency 4, and one-way transmission is given operation trend analysis and Control module 2, human-computer interaction module 6 and operation trend analysis and Control module 2 two-way transmission signals, operation trend analysis and Control module 2 is given dragging system 3 with the data command one-way transmission of handling well, gives executing agency 4 by dragging system 3 one-way transmissions again.Described operation trend analysis and Control module 2 comprises the feedback of status processing module 212 of signal that accepting state feedback module 5 transmits, and the data-signal of feedback of status processing module 212 processing is transferred to the signal conversion circuit 211 of central processing unit 204; Signals collecting and preposing signal process circuit 201 that the signal that data acquisition module 1 is gathered is handled, received signal collection and preposing signal process circuit 201 are handled the signal condition module 202 that the back signals are transferred to central processing unit 204; Operation trend analytic unit 203 to central processing unit 204 transmission signals; And data caching circuit 207, data processing unit 208, data storage cell 209, historical simulation curved unit 210 that central processing unit 204 collected signals are handled.Described human-computer interaction module 6 comprises the communication module 61 and the man-machine interface 62 of mutual transmission signal instruction, and human-computer interaction module 6 is by the communication of MODBUS agreement.

During operation, the signal that described sensor and data acquisition input module 1 are detected is transported to described signals collecting and preposing signal process circuit 201, described output control unit 205 and described dragging system 3 corresponding electrical connections, and including the communication of MODBUS agreement, the communication module 61 of described human-computer interaction module adopts the communication of MODBUS agreement with described man-machine communication's circuit 206.The operational factor that described signals collecting of process and preposing signal process circuit 201 and described signal condition module 202 were handled is sent into described central processor unit 204, and by operation trend analytic unit 203 determined trend analysis functions, in conjunction with main frame nominal parameter of sending into via described man-machine communication's circuit 206 and local meteorological data, calculate simulation system enthalpy difference variation tendency.The operational factor of described dragging system 3 is also sent into described central processor unit 204 through feedback of status module 5, feedback of status processing unit 212, signal conversion circuit 211.Described operation trend analysis and Control module 2 is according to meteorological data, temperature deviation rate of change (d Δ T/dt), pressure reduction rate of change (d Δ P/dt), the specified chilled-water flow of main frame, specified cooling water flow, rated current, sub-load efficient and historical temperature deviation rate of change (d Δ T/dt) prediction workload demand, generate load control curve and regulate chilled water and cooling water load, coupling main frame efficiency curve, the elevator system running efficiency, thus realization main frame and distributing system thereof are energy-conservation.When the speed of load variations is corrected according to deviation variation rate (d Δ T/dt) by system, system learns the Steam Generator in Load Follow performance automatically in the running, prediction is also revised curve of output, form adaptive system history data, after handling, data processing unit 208 sends into data storage cell 209 and 210 preservations of historical simulation curved unit, simultaneously, difference according to prediction curve and actual feedback is in time adjusted running, reaches central air conditioner main machine and chilled water pump, cooling water pump, the consumed power that blower fan is in operation can realize cold (heat) load of best limit match user.The present invention can be widely used in the various comfort type central air conditioner systems.

Claims

1. the energy-saving control device of a central air-conditioning, it is characterized in that: comprise sensor and data acquisition module (1), operation trend analysis and Control module (2), dragging system (3), executing agency (4), feedback of status module (5), human-computer interaction module (6), described sensor and data acquisition module (1) transmit to the unidirectional model of carrying out of operation trend analysis and Control module (2), feedback of status module (5) is from dragging system (3), signal is collected by executing agency (4), and one-way transmission is given operation trend analysis and Control module (2), human-computer interaction module (6) and the two-way transmission signal of operation trend analysis and Control module (2), operation trend analysis and Control module (2) is given dragging system (3) with the data command one-way transmission of handling well, gives executing agency (4) by dragging system (3) one-way transmission again.

2. the energy-saving control device of central air-conditioning as claimed in claim 1, it is characterized in that: described operation trend analysis and Control module (2) comprises that accepting state feedback module (5) transmits the feedback of status processing module (212) of signal, the data-signal of feedback of status processing module (212) processing is transferred to the signal conversion circuit (211) of central processing unit (204); Signals collecting and preposing signal process circuit (201) that the signal that data acquisition module (1) is gathered is handled, received signal collection and preposing signal process circuit (201) are handled the signal condition module (202) that the back signal is transferred to central processing unit (204); Operation trend analytic unit (203) to central processing unit (204) transmission signal; And data caching circuit (207), data processing unit (208), data storage cell (209), historical simulation curved unit (210) that the collected signal of central processing unit (204) is handled.

3. the energy-saving control device of central air-conditioning as claimed in claim 2, it is characterized in that: described human-computer interaction module (6) comprises the communication module (61) and the man-machine interface (62) of mutual transmission signal instruction, and human-computer interaction module (6) is by the communication of MODBUS agreement.