CN201293423Y - Highly effective energy-conserving control system of central air-conditioner - Google Patents
Highly effective energy-conserving control system of central air-conditioner Download PDFInfo
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- CN201293423Y CN201293423Y CNU2008201066735U CN200820106673U CN201293423Y CN 201293423 Y CN201293423 Y CN 201293423Y CN U2008201066735 U CNU2008201066735 U CN U2008201066735U CN 200820106673 U CN200820106673 U CN 200820106673U CN 201293423 Y CN201293423 Y CN 201293423Y
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- central air
- cooling water
- signal processor
- temperature sensor
- frequency converter
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Abstract
The utility model is an improvement design for the central air-conditioning high-efficient energy-saving control system. The improved system structure includes an on-line regulation management circuit composed of a refrigeration water circulating system, a cooling water circulating system and a signal processors. The regulating signal is transmitted from the signal processor to the frequency converter. The refrigeration water inlet and outlet pipes connected with the central air-conditioning main unit are respectively provided with a refrigeration water inlet temperature sensor, a refrigeration water outlet temperature sensor and a refrigeration water flow meter. The cooling water inlet and outlet pipes connected with the central air-conditioning main unit are respectively provided with a cooling water inlet temperature sensor, a cooling water outlet temperature sensor and outdoor temperature and humidity sensor. The signals collected by the sensors are transmitted to the signal processor through the signal collecting card, processed, compared and converted to the regulating signals and then transmitted to corresponding port of the matched frequency converter for regulating the output power of the corresponding device. Simultaneously the signal processor transmits the analyzed, computed and comparative results and regulation steps to the display unit.
Description
Technical field
The utility model relates to the control technique of central air conditioning equipment, particularly relates to the energy-efficient control system of central air-conditioning.
Technical field
Central air-conditioning is the power consumption rich and influential family, and electricity charge air-conditioning power consumption annual in the modern architecture accounts for about 60%, so the reducing energy consumption of central air-conditioning seems particularly important.Because when designing, central air conditioner system must design by load the hottest by weather, when loading maximum, and leaves the 10-20% design margin, yet in fact overwhelming majority time air-conditioning is can not operate under the full load condition, has bigger design margin in the past.So energy-conservation potentiality are just bigger.Wherein, freezing main frame can load or off-load according to load variations thereupon, and chilled water pump and cooling water pump but can not be made corresponding adjusting with load variations, has very big waste.
But said system has only been paid attention to safety and reliability in traditional design concept, ignored science and energy-conservation.The flow of water pump, blower fan system and pressure reduction are to lean on shutoff valve and flow divider to regulate to finish, therefore, there is the phenomenon of dam more greatly loss and big flow, high pressure, the low temperature difference inevitably, not only waste electric energy in a large number, but also the system least significant end of causing do not reach the situation of reasonable effect.In the existing use, make easily to cause water pump in the adjusting system, blower fan appearance " big flow, poor efficiency, high energy consumption " problem and equipment coupling, running un-reasonable phenomenon.The setting of the online running of superpower motor, water pump, blower fan and a large amount of pipeline control valves has exposed the crucial disadvantage in the existing system.Particularly in computer technology develop rapidly and sensor technology today day by day accurately, these problems cause easily that motor operating current is excessive, heating temp is high, the life-span shortens, sometimes also cause motor overload overheated and burn out coil, equipment fault hidden danger such as equipment operation vibrations are big, noise height.
The Energy Saving Control of existing central air conditioner system water pump is to adopt single parameter such as temperature as control signal on controlled water pump mostly, regulates the frequency of frequency converter, and the control pump rotary speed changes and carries fluid flow, to reach purpose of energy saving.The energy-conservation amplitude of this kind control method is limited.So technology that the utility model adopts many reference amounts that central air conditioner system is controlled, these technical schemes all need use Industrial Control Computer that frequency converter is controlled at each controlled device, then analysis result are transported to the control model of display screen and digital meter.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of central air-conditioning energy-efficient Control System Design.The utility model utilizes a plurality of parameter regulation and control to carry frozen liq, heat exchange medium and air to carry, and saves the consumption of necessary electromotor energy, improves overall efficiency, reduces cost, and guarantees central air conditioner system stable operation, convenient enforcement.
For achieving the above object, the utility model provides a kind of central air-conditioning energy-efficient control system, comprise central air conditioner main machine in the system architecture, chilled water pump group, diversion box, respectively consume cold user side, header tank and be connected to the chilled water circulatory system that the chilled water pipe between above device and the central air conditioner main machine is formed in turn: cooling tower, blower fan of cooling tower, cooling water pump group and be connected to the cooling water recirculation system that the cooling water pipe between above device and the central air conditioner main machine is formed in turn; Signal processor, be connected the online regulation and administration circuit that data acquisition card on the signal processor I/O interface, display unit and metering units are formed; Adjustment signal is sent by signal processor and delivers to the frequency converter that chilled water pump group, cooling water pump group and blower fan drive motors match.Key is: be separately installed with chilled water inlet temperature sensor, chilled water outlet temperature sensor, chilled-water flow meter in the chilled water import and export water pipe on the connection central air conditioner main machine, be connected in the cooling water import and export water pipe on the central air conditioner main machine and be separately installed with cooling water inlet temperature sensor, cooling water outlet temperature sensor, outdoor temperature, humidity sensor; More than signal that each sensor collected respectively through data acquisition card, be sent to signal processor, through data handle, comparison is converted into adjustment signal and delivers to the frequency converter corresponding port that connects of corresponding coupling again and realize power output regulation and control to relevant device, the synchronous signal processor is transported to display unit with analysis, calculating, comparative result and regulation and control step.The system operator on duty of being beneficial to carries out observation and artificial regulatory at random.
Advantage of the present utility model just is:
The utility model is simple and compact for structure, with low cost, automaticity is high, man-machine interface operation, data are printed, monitoring in real time, alarm, installation and maintenance are convenient, can directly on existing structure, transform, it is applied widely, be easy to apply, can save simultaneously central air-conditioning motor power consumption, improve the main frame operational efficiency, reduce cost, guarantee the stable operation of central air-conditioning complete machine.
Description of drawings
Fig. 1 is a frame structure schematic diagram of the present utility model
Marginal data
1, central air conditioner main machine 2, diversion box
3, user side 4, header tank
5, chilled water pump group 6, cooling water pump group
7, cooling tower 8, blower fan
9, the supporting supporting frequency converter of frequency converter 10, cooling water pump of chilled water pump
11, supporting frequency converter 12, the chilled-water flow meter of blower fan of cooling tower
13, chilled water data acquisition card 14, chilled water inlet temperature sensor
15, chilled water outlet temperature sensor 16, cooling water inlet temperature sensor
17, cooling water outlet temperature sensor 18, cooling water data acquisition card
19, outdoor temperature, humidity sensor 20, signal processor
21, display unit 22, metering units
23, cooling water inlet pipe 24, cooling water outlet pipe
25, chilled water water inlet pipe 26, chilled water outlet pipe
Further the utility model is described in further details below with reference to accompanying drawing.
The specific embodiment
Can know with reference to Fig. 1 and to find out: the central air-conditioning energy control system that the utility model is designed, comprise central air conditioner main machine 1 in the structure, chilled water pump group 5, diversion box 2, respectively consume cold user side 3, header tank 4 and be connected to above device in turn and central air conditioner main machine 1 between the chilled water circulatory system formed of chilled water pipe; Cooling tower 7, blower fan of cooling tower 8, cooling water pump group 6 and be connected to above device in turn and central air conditioner main machine 1 between the cooling water recirculation system formed of cooling water pipe; Signal processor 20, be connected the online regulation and administration circuit that data acquisition card on the signal processor 20I/O interface, display unit 21 and metering units 22 are formed; Adjustment signal is sent by signal processor 20 and delivers to the frequency converter that chilled water pump group 5, cooling water pump group 6 and blower fan 8 drive motors match.Key is: the chilled water that connects on the central air conditioner main machine 1 advances, outlet water pipe (25,26) be separately installed with chilled water inlet temperature sensor 14 in, chilled water outlet temperature sensor 15, chilled-water flow meter 12, the cooling water that is connected on the central air conditioner main machine 1 advances, be separately installed with cooling water inlet temperature sensor 16 in the outlet water pipe, cooling water outlet temperature sensor 17, outdoor temperature, humidity sensor 19, more than signal that each sensor collected respectively through data acquisition card (13,18), be sent to signal processor 20, handle through data, comparison is converted into adjustment signal and delivers to the frequency converter corresponding port that connects of corresponding coupling again and realize power output regulation and control to relevant device, and synchronous signal processor 20 will be analyzed, calculate, comparative result and regulation and control step are transported to display unit 21.
Be provided with in the signal processor 20 to store and prop up following of normal operating mode grade, code and various mode hierarchies that line state determines according to each main body of running status index and pipe network of the cold user side 3 of external environment condition, consumption and is connected the memory that the empirical data of the sampling parameter standard value that consumes cold user side branch node and this numerical value change scope thereof is tabulated.
Adjustment that the result store the data that arrive according to online acquisition and empirical data comparison and to analyze selects also is set in the signal processor 20 instructs the link vector table, directly conclusion and instruction are transported to display unit 14 according to above online comparison, analysis result.
The corresponding setting of platform number of the quantity of the frequency converter in the frequency converter group (9,10) and supporting water pump, the corresponding setting of group number of the quantity of frequency converter and blower fan is supporting with the branch road of transmission recirculated water respectively in the frequency converter group 11.
Each node place that connects chilled water pump group 5, central air conditioner main machine 1 and consume circulation line between the cold user side end 3 or connect circulation line between cooling water pump group 6, central air conditioner main machine 1 and the cooling tower 7 only is provided for overhauling the stop valve that pipeline is used.
Signal processor 20 is to adopt Programmable Logic Controller 6ES7-134.
The utility model is respectively in the cooling water of central air conditioner main machine and advancing of chilled water, temperature sensor and flow sensor are installed on the outlet pipe, gather cooling water, chilled water is at the real time temperature at water inlet and delivery port place, flow information, send signal to signal processor through data acquisition card then, by comparing unit in the signal processor, PI pi element and data analysis unit are analyzed this signal, handle, pass through frequency converter then directly to blower fan, the cooling water pump group, the drive motors of chilled water pump group carries out real-time monitoring, the energy that each subsystem is carried can be regulated in real time with the variation of subscriber terminal equipment power consumption, to save motor power consumption, reduced the positive energy exchange that enters central air conditioner main machine evaporimeter and condenser simultaneously, central air conditioner main machine running load amplitude is descended, thereby improved the main frame service efficiency.
In the cooling water subsystem of the present utility model, cooling water is set to 28-30 ℃ according to the general inflow temperature of system requirements, and leaving water temperature is set to 33～36 ℃.Set value storage in the memory of signal processor 20 with 33-36 ℃.The signal of cooling water outlet temperature sensor 16, cooling water inlet temperature sensor 13 is sent into signal processor 20 through data acquisition card 18 as error feedback signal and is compared, and through the pi element computing, the result is converted to command adapted thereto and sends into the corresponding converter circuit of cooling water pump group, produce the frequency of revising and adjust the power output that water pump is kept thinking about, thus control cooling water system flow.Simultaneously the adjustment signal of correspondence is sent in the supporting frequency converter of blower fan of cooling tower institute, changed frequency, realize regulating cooling tower 7 cooling air quantities.Synchronous signal processor 20 is transported to display unit (21) with the analytical calculation comparative result and above the digital meter (22).
When central air-conditioner host 1 was used to heat, chilled water system was the warm water system, and situation was identical when its control situation was freezed with central air conditioner main machine 1, did not repeat them here.
Claims (6)
1, the energy-efficient control system of central air-conditioning, comprise central air conditioner main machine (1) in the system architecture, chilled water pump group (5), diversion box (2), each consumes cold user side (3), header tank (4), and be connected to the chilled water circulatory system that the chilled water pipe between above device and the central air conditioner main machine (1) is formed in turn, cooling tower (7), blower fan of cooling tower (8), cooling water pump group (6), and be connected to the cooling water recirculation system that the cooling water pipe between above device and the central air conditioner main machine (1) is formed in turn, signal processor (20), be connected the data acquisition card on signal processor (20) the I/O interface, the online regulation and administration circuit that display unit (21) and metering units (22) are formed, adjustment signal is sent by signal processor (20) and delivers to chilled water pump group (5), the frequency converter that cooling water pump group (6) and blower fan (8) drive motors match, it is characterized in that: the chilled water that connects on the central air conditioner main machine (1) advances, outlet water pipe (25,26) be separately installed with chilled water inlet temperature sensor (14) in, chilled water outlet temperature sensor (15), chilled-water flow meter (12), the cooling water that is connected on the central air conditioner main machine (1) advances, be separately installed with cooling water inlet temperature sensor (16) in the outlet water pipe, cooling water outlet temperature sensor (17), outdoor temperature, humidity sensor (19), more than signal that each sensor collected respectively through data acquisition card (13,18), be sent to signal processor (20), handle through data, comparison is converted into adjustment signal and delivers to the frequency converter corresponding port that connects of corresponding coupling again and realize power output regulation and control to relevant device, and synchronous signal processor (20) will be analyzed, calculate, comparative result and regulation and control step are transported to display unit (21).
2,, it is characterized in that being provided with in the signal processor (20) storing and prop up normal operating mode grade, code and following of various mode hierarchies that line state determines according to each main body of running status index and pipe network of the cold user side (3) of external environment condition, consumption and is connected the memory that the empirical data of the sampling parameter standard value that consumes cold user side branch node and this numerical value change scope thereof is tabulated according to the energy-efficient control system of the said central air-conditioning of claim 1.
3, according to the energy-efficient control system of the said central air-conditioning of claim 1, it is characterized in that in the signal processor (20) also being provided with adjustment that the result that stores the data that arrive according to online acquisition and empirical data comparison and analyze selects and instruct the link vector table, directly conclusion and instruction are transported to display unit (14) according to above online comparison, analysis result.
4, according to the energy-efficient control system of the said central air-conditioning of claim 1, it is characterized in that the quantity of the frequency converter in the frequency converter group (9,10) and the corresponding setting of platform number of supporting water pump, the quantity of the middle frequency converter of frequency converter group (11) and the corresponding setting of group number of blower fan, supporting with the branch road of transmission recirculated water respectively.
5, according to the energy-efficient control system of the said central air-conditioning of claim 1, each node place that it is characterized in that connecting circulation line between the cold user side end (3) of chilled water pump group (5), central air conditioner main machine (1) and consumption or connect circulation line between cooling water pump group (6), central air conditioner main machine (1) and the cooling tower (7) only is provided for overhauling the stop valve that pipeline is used.
6,, it is characterized in that signal processor (20) is to adopt Programmable Logic Controller 6ES7-134 according to the energy-efficient control system of the said central air-conditioning of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201066735U CN201293423Y (en) | 2008-11-25 | 2008-11-25 | Highly effective energy-conserving control system of central air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201066735U CN201293423Y (en) | 2008-11-25 | 2008-11-25 | Highly effective energy-conserving control system of central air-conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN201293423Y true CN201293423Y (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201066735U Expired - Fee Related CN201293423Y (en) | 2008-11-25 | 2008-11-25 | Highly effective energy-conserving control system of central air-conditioner |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881944A (en) * | 2010-06-18 | 2010-11-10 | 北京斯普信电子技术有限公司 | Energy consumption integrated control system and method |
| CN102080863A (en) * | 2010-12-08 | 2011-06-01 | 海尔集团公司 | Control method and device of central air conditioner |
| CN105823145A (en) * | 2016-05-19 | 2016-08-03 | 江苏铁鑫能源科技有限公司 | Multi-user ground source heat pump air conditioning system based on public water pump and suitable for high-rise building |
| WO2017067367A1 (en) * | 2015-10-23 | 2017-04-27 | 深圳市纬度节能服务有限公司 | Energy-saving centralized control system of water system |
| CN107576003A (en) * | 2017-10-18 | 2018-01-12 | 珠海格力电器股份有限公司 | A kind of air-conditioning system and the control method for improving the air-conditioning system operation stability |
| CN115077199A (en) * | 2022-06-28 | 2022-09-20 | 中石化节能技术服务有限公司 | Method and system for utilizing low-temperature heat and chilled water |
-
2008
- 2008-11-25 CN CNU2008201066735U patent/CN201293423Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881944A (en) * | 2010-06-18 | 2010-11-10 | 北京斯普信电子技术有限公司 | Energy consumption integrated control system and method |
| CN102080863A (en) * | 2010-12-08 | 2011-06-01 | 海尔集团公司 | Control method and device of central air conditioner |
| WO2017067367A1 (en) * | 2015-10-23 | 2017-04-27 | 深圳市纬度节能服务有限公司 | Energy-saving centralized control system of water system |
| CN105823145A (en) * | 2016-05-19 | 2016-08-03 | 江苏铁鑫能源科技有限公司 | Multi-user ground source heat pump air conditioning system based on public water pump and suitable for high-rise building |
| CN107576003A (en) * | 2017-10-18 | 2018-01-12 | 珠海格力电器股份有限公司 | A kind of air-conditioning system and the control method for improving the air-conditioning system operation stability |
| CN115077199A (en) * | 2022-06-28 | 2022-09-20 | 中石化节能技术服务有限公司 | Method and system for utilizing low-temperature heat and chilled water |
| CN115077199B (en) * | 2022-06-28 | 2024-04-19 | 中石化节能技术服务有限公司 | Method and system for utilizing low-temperature heat and chilled water |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20111125 |