CN2703223Y - Central air conditioner energy-saving controlling device - Google Patents

Central air conditioner energy-saving controlling device Download PDF

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Publication number
CN2703223Y
CN2703223Y CN 03278224 CN03278224U CN2703223Y CN 2703223 Y CN2703223 Y CN 2703223Y CN 03278224 CN03278224 CN 03278224 CN 03278224 U CN03278224 U CN 03278224U CN 2703223 Y CN2703223 Y CN 2703223Y
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China
Prior art keywords
controller
central air
air
control device
air conditioner
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Expired - Fee Related
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CN 03278224
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Chinese (zh)
Inventor
张健
兰大志
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Liyuan Automatization Science & Technology Co ltd Suzhou
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Liyuan Automatization Science & Technology Co ltd Suzhou
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Abstract

The utility model discloses a central air conditioner energy-saving controlling device, comprising a controller and a frequency changing and controlling device. The frequency changing and controlling device is respectively controls and connected with an air conditioner main frame, a freezing water pump, a cooling water pump and a blower fan system. A freezing water inlet, a freezing water outlet, a cooling water inlet, an outdoor unit and the end of the air conditioner are respectively provided with a temperature sensor. The position harmful to the loop is provided with a pressure sensor, the sensor signal output end of each pressure sensor is respectively connected with the input interface of the controller, and the output interface of the controller is respectively connected to the input port of each part of the frequency changing and controlling device. The utility model is capable of realizing whole controlling of each part of the central air conditioner and adopting a controlling mode of changing air quantity and flow-rate to make each system operate under optimum condition. Consequently, the energy-saving is realized, and the goal of prolonging service life of the equipment is achieved.

Description

The central air-conditioning energy control device
Technical field
The utility model relates to a kind of control device of central air-conditioning, is specifically related to a kind of central air-conditioning integral body be carried out Based Intelligent Control, to realize the device of energy-saving effect.
Background technology
Central air-conditioning generally includes air-conditioner host, chilled water system, cooling water system, terminal blower fan system and blower fan of cooling tower system, because during design, central air-conditioning must situation the hottest by weather, that load is maximum design, multiply by 10~20% safety coefficient again, and in fact overwhelming majority time air-conditioning is can not operate under the full load condition, according to relevant departments statistics, it is following that central air conditioner system has time of 90% to run on 75% load.Present case is, most of central air conditioner systems all adopt constant flow, constant air volume system, and promptly as long as start air-conditioner host, water pump, blower fan all move under 50Hz power frequency state, air quantity, the excessive situation of the water yield often occur, cause the waste of energy.As seen, there be bigger having more than needed in present central air conditioner system, so energy-conservation potentiality are bigger.
Frequency converter can be adjusted rotating speed of motor according to chilled water pump, cooling water pump and blower fan system load variations, makes water pump and blower fan make corresponding adjusting under the situation that satisfies the central air-conditioning operate as normal, to reach energy-conservation purpose.As disclosing a kind of air conditioner water pump frequency conversion energy-saving control device among the Chinese utility model patent CN2331900Y, it is respectively arranged with temperature sensor at chilled water import and export and cooling water import and export, utilize the temperature approach of chilled water import and export and cooling water import and export to compare, control the running frequency of water pump with setting temperature approach.This structure can according to circumstances be adjusted the rotating speed of pump motor, plays certain energy-conserving action, still, the ruuning situation of central air-conditioning, its influence factor is many-sided, and air-conditioning system is a system non-linear, that time variation is strong, and the simple temperature difference is regulated and can not be reached good effect.Therefore, be necessary the central air-conditioning total system is carried out Based Intelligent Control, to reach good control and energy-saving effect.
Summary of the invention
The utility model purpose provides a kind of central air-conditioning energy control device, by the effective Detection ﹠ Controling to the central air-conditioning each several part, reaches energy-conservation, improves the purpose of controlling effect, improving service life of equipment.
For achieving the above object, the technical solution adopted in the utility model is: a kind of central air-conditioning energy control device, comprise controller and frequency conversion, control device, described frequency conversion, control device connects the control air-conditioner host respectively, chilled water pump, cooling water pump and blower fan system, chilled water water inlet and delivery port at air-conditioner host, cooling water intake, outdoor and air conditioning terminal is respectively equipped with temperature sensor, the place is provided with pressure sensor at the chilled water index circuit, the transducing signal output of each sensor connects the input interface of controller respectively, and the output interface of controller is connected to frequency conversion respectively, the input port of control device each several part.
In the technique scheme, include control software of the present utility model in described " controller ", can realize analyzing and processing to each sensor signal, produce feedback control signal according to setting value, with the frequency conversion of controlling air-conditioner host, chilled water pump, cooling water pump and blower fan system respectively, the running of control device, in further scheme, controller also can communicate with computer terminal or touch terminal.Utilize software and database setting, can realize fuzzy control.Described " frequency conversion, control device " is used to handle each executing agency of central air-conditioning, comprise a plurality of frequency converters and relevant control circuit, respectively air-conditioner host, chilled water pump, cooling water pump and blower fan system are realized VFC, reach the purpose of unsteady flow amount, variable air volume running, wherein can comprise to the variable air rate control of air conditioning terminal blower fan system with to the control system of blower fan of cooling tower the control of blower fan system.
In the technique scheme, described controller can be connected with monitor terminal.Wherein, can be provided with network interface in described monitor terminal, this network interface can be a LAN adapter, also can be the dialing Internet device, or can realize other device of communication by network.By network interface, this device can communicate with remote supervisory and control(ling) equipment, provides data message for analysis to remote supervisory and control(ling) equipment, perhaps receives the control parameter from remote supervisory and control(ling) equipment.
In the technique scheme, described controller can also be connected with touch terminal, uses with convenient.
The utility model can be realized the integral body control to central air-conditioning, and its each several part course of work is as follows:
1. chilled water loop:
Determine the minimum running frequency of a chilled water earlier according to freezing loop characteristics, guarantee system safety operation.Work as environment temperature, when the air conditioning terminal load changes, chilled water supply and return water temperature sensor and terminal temperature, pressure sensor is delivered to controller with detected these parameters, controller is according to the real time data of being gathered and the history data of system, calculate the required refrigerating capacity of terminal air conditioner load in real time, and chilled water supply and return water temperature, the optimum value of the temperature difference, take these values and present operational factor to compare, and regulate the frequency converter output frequency with this, the rotating speed of control chilled water pump changes the supply and return water temperature that its flow makes chilled water system, the temperature difference and flow operate in the optimal value that controller provides.
2. cooling water loop:
Determine the minimum running frequency of a cooling water pump earlier according to the cooling system characteristic, the cooling water water inlet is the highest, minimum temperature guarantees system safety operation.When environment temperature, when the air conditioning terminal load changes, the load of central air conditioner main machine will change thereupon, and the best condensation temperature of main condenser also changes thereupon.Controller is according to the real time data of being gathered and the history data of system, calculate the best condensation temperature of main condenser, and the best inlet temperature of cooling water and compare with this temperature and actual motion temperature, and regulate the output frequency of cooling water pump frequency converter with this, the control cooling water pump, the flow of dynamic adjustments cooling water makes the inlet temperature of cooling water approach the optimal value that fuzzy controller provides, thereby guarantees that central air conditioner main machine is in operation under the optimal conversion efficiency state at any time.
Because cooling water system adopts optimal conversion efficiency control, guaranteed that central air conditioner main machine is under the situation of full load and part load, all be in optimum Working, remain best energy utilization rate (being the COP value), thereby reduced the energy consumption of air-conditioner host, move because of cooling water pump is lower than under the rated load through being everlasting simultaneously, also saved the energy consumption of cooling water pump to greatest extent.
3. the variable air volume system of terminal blower fan:
Determine the minimum running frequency of a blower fan earlier according to the blower fan system characteristic, guarantee system safety operation.When environment temperature, when the air conditioning terminal load changes, terminal temperature sensor and outdoor temperature sensor are delivered to controller with detected these parameters, controller is according to the real time data of being gathered and the history data of system, calculate the required air quantity of terminal air conditioner load in real time, and the optimum value of terminal temperature, and regulate the frequency converter output frequency with this, the rotating speed of control blower fan changes its air quantity and makes terminal temperature operate in the optimal value that controller provides.
4. blower fan of cooling tower control system:
Determine the minimum running frequency of a blower fan earlier according to the cooling tower system performance, guarantee system safety operation.When environment temperature, when air conditioner load changes, outdoor temperature sensor and cold in-water temperature sensor are delivered to the blower fan of cooling tower control system, this subsystem is according to real time data of being gathered and historical data, calculate the cold in-water temperature value that meets main frame operating mode needs, and regulate the frequency converter output frequency with this, the control rotation speed of fan obtains good energy-saving effect.
Simultaneously, under the situation by computer terminal networking, this device be except can realizing Automatic Control, timed power on/off, and main frame, water pump, the blower fan co-ordination can also realize Long-distance Control.At this moment, can set up database for air-conditioning system, by the data analysis center of far-end, analyze data and historical data constantly, constantly improve program, and provide and instruct operation to make the more accurate of load simulation, power savings is better.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
1. because the utility model is provided with outdoor temperature sensor and air conditioning terminal temperature sensor, can realize VFC on the one hand to blower fan system, realize energy-conservation and more comfortable environment is provided, on the other hand, can more effectively control the operation of chilled water pump and cooling water pump, improve energy-saving effect;
2. the utility model is in the cooling water loop, by a temperature sensor is set at cooling water intake, utilize characteristic and the historical data of outdoor temperature situation and the load condition of main frame of cooling water loop, analyze the optimum temperature value of cooling water water inlet, control the operating load of adjusting cooling water pump, compare better effects if with the single temperature differential method control of employing cooling water pump;
3. controller of the present utility model can connect the computer terminal, and be connected with network by the computer terminal, thereby can realize Long-distance Control, thus, can realize by control software, monitoring software and the powerful software control system of air-conditioning system database composition function, and in service in program, constantly improve its Database Systems, and then analyze, revise operational factor, reach optimal control results and energy and save.
Description of drawings
Accompanying drawing 1 is that the circuit of the utility model embodiment one connects schematic block diagram.
Wherein: [1], temperature sensor (chilled water water inlet); [2], temperature sensor (chilled water delivery port); [3], temperature sensor (cooling water intake); [4], temperature sensor (outdoor); [5], temperature sensor (air conditioning terminal); [6], pressure sensor (index circuit place);
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: shown in accompanying drawing 1, a kind of central air-conditioning energy control device, comprise controller and frequency conversion, control device, described frequency conversion, control device connects the control air-conditioner host respectively, chilled water pump, cooling water pump and blower fan system, chilled water water inlet and delivery port at air-conditioner host, cooling water intake, outdoor and air conditioning terminal is respectively equipped with temperature sensor 1-5, the place is provided with pressure sensor 6 at the chilled water index circuit, the transducing signal output of each sensor connects the input interface of controller respectively, the output interface of controller is connected to frequency conversion respectively, the input port of control device each several part, simultaneously, the output interface of controller also is connected with touch terminal with the computer control terminal respectively, be provided with network interface in the described computer control terminal, be connected with the remote monitoring center through LAN thus, and and then be connected with data analysis center through the internet, also can adopt phone dialing mode to be connected to data analysis center.
Present embodiment is when real work, also must include software control system, this control system can comprise control software, monitoring software and air-conditioning system database, control software wherein is stored in the chip of controller, can realize analyzing and processing to each sensor signal, produce feedback control signal according to setting value, to control air-conditioner host respectively, chilled water pump, cooling water pump, the frequency conversion of terminal blower fan system and blower fan of cooling tower system, the running of control device, its state and setting value can observe on computer control terminal or touch terminal and be provided with, if be connected with data analysis center, but time recording related data also then, so that adopt computer program to analyze or do the manual analysis intervention automatically, further improve energy-saving efficiency.

Claims (4)

1. central air-conditioning energy control device, comprise controller and frequency conversion, control device, described frequency conversion, control device connects the control air-conditioner host respectively, chilled water pump, cooling water pump and blower fan system, it is characterized in that: at the chilled water water inlet and the delivery port of air-conditioner host, cooling water intake, outdoor and air conditioning terminal is respectively equipped with temperature sensor [1,2,3,4,5], be provided with pressure sensor [6] at chilled water index circuit place, the transducing signal output of each sensor connects the input interface of controller respectively, and the output interface of controller is connected to frequency conversion, the input port of control device.
2. central air-conditioning energy control device as claimed in claim 1 is characterized in that: described controller is connected with monitor terminal.
3. central air-conditioning energy control device as claimed in claim 2 is characterized in that: be provided with network interface in the described monitor terminal.
4. central air-conditioning energy control device as claimed in claim 1 is characterized in that: described controller also is connected with touch terminal.
CN 03278224 2003-08-29 2003-08-29 Central air conditioner energy-saving controlling device Expired - Fee Related CN2703223Y (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100443814C (en) * 2006-08-01 2008-12-17 华南理工大学 System of adjusting quantity of cold, and adjustment method for central cooling in region
CN100445655C (en) * 2007-01-23 2008-12-24 贵州汇通华城楼宇科技有限公司 Heating ventilating and air conditioning hydraulic dynamic regulation method and device based on energy distribution equilibrium
CN101957041A (en) * 2010-08-23 2011-01-26 张铭联 Safe and energy-saving operation method for central air conditioner
CN102135311A (en) * 2011-04-06 2011-07-27 华南理工大学 Air conditioning system integral optimized control device
CN102645006A (en) * 2012-05-07 2012-08-22 深圳市捷华深环保节能科技有限公司 Energy-saving remote control system for central air conditioner and use method thereof
CN102748944A (en) * 2012-08-06 2012-10-24 王晶华 Automatic regulating and controlling device of roller kiln
CN104121666A (en) * 2014-07-07 2014-10-29 湖南科技大学 Hourly frequency conversion air supplying system and control method for central air conditioning ventilation system
CN104534623A (en) * 2014-12-23 2015-04-22 珠海格力电器股份有限公司 Air conditioning system and control method of air conditioning system
CN104583683A (en) * 2012-05-15 2015-04-29 大金应用美洲公司 Cloud based building automation systems
CN104566815A (en) * 2014-12-26 2015-04-29 珠海格力电器股份有限公司 Remote control system and method for water system of central air conditioner and central air conditioner
WO2015062364A1 (en) * 2013-11-01 2015-05-07 珠海格力电器股份有限公司 Method for controlling operation of air-conditioning system, apparatus, system host machine and air-conditioning system
CN107178868A (en) * 2017-04-20 2017-09-19 深圳达实智能股份有限公司 A kind of hospital clinic fan coil wind speed and cold inter-linked controlling method and device
CN107678314A (en) * 2017-10-16 2018-02-09 海宁欣源电子科技有限公司 A kind of VAV control systems
CN108895605A (en) * 2018-08-01 2018-11-27 河南诺节能科技有限公司 The vari- able flow control device of cooling system
CN109682009A (en) * 2018-12-19 2019-04-26 西安航空学院 A kind of air conditioning water self-checking device
CN110375415A (en) * 2019-06-25 2019-10-25 上海华船资产管理有限公司 The frequency-changing control system of central air-conditioning
CN110895034A (en) * 2018-09-10 2020-03-20 安徽华斯源新能源科技有限公司 Energy-saving monitoring method for central air conditioner
CN111503837A (en) * 2019-01-30 2020-08-07 新奥数能科技有限公司 Method and device for regulating and controlling variable air volume central air-conditioning system

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100443814C (en) * 2006-08-01 2008-12-17 华南理工大学 System of adjusting quantity of cold, and adjustment method for central cooling in region
CN100445655C (en) * 2007-01-23 2008-12-24 贵州汇通华城楼宇科技有限公司 Heating ventilating and air conditioning hydraulic dynamic regulation method and device based on energy distribution equilibrium
CN101957041A (en) * 2010-08-23 2011-01-26 张铭联 Safe and energy-saving operation method for central air conditioner
CN102135311A (en) * 2011-04-06 2011-07-27 华南理工大学 Air conditioning system integral optimized control device
CN102135311B (en) * 2011-04-06 2013-05-08 华南理工大学 Air conditioning system integral optimized control device
CN102645006A (en) * 2012-05-07 2012-08-22 深圳市捷华深环保节能科技有限公司 Energy-saving remote control system for central air conditioner and use method thereof
CN104583683A (en) * 2012-05-15 2015-04-29 大金应用美洲公司 Cloud based building automation systems
CN104583683B (en) * 2012-05-15 2018-06-12 大金应用美洲公司 building automation system based on cloud
CN102748944A (en) * 2012-08-06 2012-10-24 王晶华 Automatic regulating and controlling device of roller kiln
WO2015062364A1 (en) * 2013-11-01 2015-05-07 珠海格力电器股份有限公司 Method for controlling operation of air-conditioning system, apparatus, system host machine and air-conditioning system
CN104121666A (en) * 2014-07-07 2014-10-29 湖南科技大学 Hourly frequency conversion air supplying system and control method for central air conditioning ventilation system
CN104121666B (en) * 2014-07-07 2016-08-31 湖南科技大学 For central air-conditioning wind system by time frequency conversion air feed system and control method
CN104534623A (en) * 2014-12-23 2015-04-22 珠海格力电器股份有限公司 Air conditioning system and control method of air conditioning system
CN104566815A (en) * 2014-12-26 2015-04-29 珠海格力电器股份有限公司 Remote control system and method for water system of central air conditioner and central air conditioner
CN104566815B (en) * 2014-12-26 2018-11-27 珠海格力电器股份有限公司 Central air conditioning water system tele-control system and control method, central air-conditioning
CN107178868A (en) * 2017-04-20 2017-09-19 深圳达实智能股份有限公司 A kind of hospital clinic fan coil wind speed and cold inter-linked controlling method and device
CN107178868B (en) * 2017-04-20 2019-07-26 深圳达实智能股份有限公司 A kind of hospital clinic fan coil wind speed and cooling capacity inter-linked controlling method and device
CN107678314A (en) * 2017-10-16 2018-02-09 海宁欣源电子科技有限公司 A kind of VAV control systems
CN108895605A (en) * 2018-08-01 2018-11-27 河南诺节能科技有限公司 The vari- able flow control device of cooling system
CN110895034A (en) * 2018-09-10 2020-03-20 安徽华斯源新能源科技有限公司 Energy-saving monitoring method for central air conditioner
CN109682009A (en) * 2018-12-19 2019-04-26 西安航空学院 A kind of air conditioning water self-checking device
CN111503837A (en) * 2019-01-30 2020-08-07 新奥数能科技有限公司 Method and device for regulating and controlling variable air volume central air-conditioning system
CN110375415A (en) * 2019-06-25 2019-10-25 上海华船资产管理有限公司 The frequency-changing control system of central air-conditioning

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C14 Grant of patent or utility model
GR01 Patent grant
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Granted publication date: 20050601

Termination date: 20120829