CN101140096A - electricity economizer centralized management method and system of central air-conditioning - Google Patents
electricity economizer centralized management method and system of central air-conditioning Download PDFInfo
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- CN101140096A CN101140096A CNA2007101333647A CN200710133364A CN101140096A CN 101140096 A CN101140096 A CN 101140096A CN A2007101333647 A CNA2007101333647 A CN A2007101333647A CN 200710133364 A CN200710133364 A CN 200710133364A CN 101140096 A CN101140096 A CN 101140096A
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Abstract
The invention relates to a method and a system for centralized management of an electric saver of a central air-conditioner, which comprises a water flow pressure difference sensor between a water supply main pipe and a return water main pipe of a central air-conditioner freezing water system, a flow meter for a two-way freezing water return pipe, a water temperature sensor for a back-way freezing water return pipe of a freezing water pump, the water temperature sensor for a freezing water outlet pipe of an air conditioning mainframe, the water temperature sensor for a cooling water outlet pipe of the air conditioning mainframe and the water temperature sensor for a cooling water inlet main pipe of the air conditioning mainframe respectively collect pressure difference, flow speed and water temperature of the corresponding position; collection values are transferred into a fuzzy controller, the fuzzy controller gains dynamic flow and speed parameters through the control of a fuzzy prediction model and an optimal algorithm model, the dynamic flow and speed parameters are transferred into each electric saver, and the speed and the flow of corresponding fans and water pumps are controlled through the frequency change of the electric saver. The invention has the advantages of high temperature-adjusting precision, good dynamic performance, small mechanical loss, fully-automatic remote monitoring, closed-loop control of temperature, soft starting and stopping of a motor and the optimum system electricity-saving rate.
Description
Technical field
The present invention relates to a kind of electricity-saving appliance centralized management system, relate in particular to a kind of method and system of electricity-saving appliance centralized management of central air-conditioning.
Background technology
Because the unstability of central air conditioner system load, what chilled water system that air-conditioning system is original and cooling water system adopted is the water supply in parallel of many water pumps, control the flow of water by the Artificial Control mode, can satisfy the requirement that air conditioner load changes to a certain extent, the separate unit power of water pump is all bigger, the operation platform number that changes separate unit then can significantly change the flow of water, is difficult to accurately control the requirement of freezing unit to discharge.Simultaneously, the load of air-conditioning system is all different in different phase.
Therefore, can be with burden requirement, air-conditioning system can change the flow of chilled water, cooling water dynamically, the operation platform number of dynamic control water pump, the flow of chilled water and cooling water, temperature are controlled in the best scope, can satisfy the technology that handpiece Water Chilling Units requires, will be a research topic with very big practical significance.
Summary of the invention
The objective of the invention is to solve all deficiencies that exist in the prior art central air conditioner system, a kind of method and system of electricity-saving appliance centralized management is provided, effectively carry out Long-distance Control, the separate unit switching of electricity-saving appliance, dynamically control the rotating speed of blower fan and the flow of water pump, fully saves energy reduces operating personnel and maintenance personal's labour intensity greatly.
Purpose of the present invention is achieved through the following technical solutions:
The system of the electricity-saving appliance centralized management of central air-conditioning, comprise central switch board, fuzzy controller and sensor, it is characterized in that: between the confession of freezing water system of central air conditioner, return main, be provided with the current differential pressure pickup, be respectively equipped with flowmeter on the two-way chilled water return pipe, be respectively equipped with cooling-water temperature sensor on the chilled water water pump way of escape chilled water return pipe, air-conditioner host chilled water outlet pipe is provided with cooling-water temperature sensor; On the air-conditioner host cooling water outlet pipe, cooling-water temperature sensor is installed, on the air-conditioner host cooling water water inlet manifold cooling-water temperature sensor is installed also, every flowmeter, cooling-water temperature sensor and current differential pressure pickup all are connected with fuzzy controller, by LAN electricity-saving appliance is connected with central switch board, adopts the RS485 protocol communication.
Further, the method of the electricity-saving appliance centralized management of central air-conditioning, it is characterized in that: by the current differential pressure pickup between the confession return main of freezing water system of central air conditioner, flowmeter on the two-way chilled water return pipe, cooling-water temperature sensor on the chilled water water pump way of escape chilled water return pipe, cooling-water temperature sensor on the air-conditioner host chilled water outlet pipe, cooling-water temperature sensor on cooling-water temperature sensor on the air-conditioner host cooling water outlet pipe and the air-conditioner host cooling water water inlet manifold, gather the pressure reduction of correspondence position respectively, flow velocity, water temperature, the collection value is sent to fuzzy controller, fuzzy controller adopts fuzzy prediction method model and optimizes algorithm model control and obtains dynamic flow and speed parameter, and send each electricity-saving appliance to, control the speed and the flow of corresponding blower fan and water pump by the variation of electricity-saving appliance frequency; Specifically comprise following detailed step---
(a) send instruction variable frequency starting chilled water water pump, cooling water water pump and air-cooler by fuzzy controller to corresponding electricity-saving appliance, fuzzy controller is according to the real time data of gathering and the history data of system, calculating load needs with refrigerating capacity and optimum temperature, the temperature difference, pressure reduction and flow value, and make comparisons with detected actual parameter, regulate the rotating speed of chilled water water pump according to its deviate control electricity-saving appliance, change supply and return water temperature, the temperature difference, pressure reduction and the flow that its flow makes chilled water system and be tending towards the given optimal value of fuzzy controller;
(b) the control parameter value of exporting according to fuzzy controller, each electricity-saving appliance is regulated the output frequency of corresponding cooling water pump variable frequency device, the rotating speed of control cooling water water pump, the flow of dynamic adjustments cooling water makes the given optimal value of import and export temperature approaches fuzzy controller of cooling water;
(c) the control parameter value of exporting according to fuzzy controller, electricity-saving appliance is dynamically adjusted operation platform number, running time and the speed of air-cooler, make the inlet temperature of cooling water approach the given optimal value of fuzzy controller, make cooling water inlet temperature satisfy air-conditioner host and be in optimal operating condition.
Further, the method of the electricity-saving appliance centralized management of above-mentioned central air-conditioning, fuzzy controller is set the minimum operation frequency of cooling water water pump, and the determinated low limit frequency values is the water pump operation frequency that is slightly larger than central air conditioner main machine cooling water correspondence when allowing minimum flow.
Again further, the method of the electricity-saving appliance centralized management of above-mentioned central air-conditioning, the man-machine interface of central switch board carry out central air conditioner system startup, stop, carry out the switching of any water pump, blower fan and electricity-saving appliance, carry out air-conditioner temperature parameter, the setting of Temperature Fuzzy Control parameter, show operation, fault, alarm condition, show power consumption, amount of electricity saving and the power saving rate of amount of electricity saving, power saving rate and the central air conditioner system of each electricity-saving appliance.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
The present invention effectively carries out Long-distance Control, the separate unit switching of electricity-saving appliance, dynamically controls the rotating speed of blower fan and the flow of water pump, fully saves energy; Temperature adjustment precision height, dynamic property are good, blower fan water pump often is not in full rotating speed operation, mechanical loss is little, full-automatic remote monitoring, temperature closed loop control, soft starter for motor, soft stopping, when having eliminated electric motor starting to the impact of electrical network, reduce the noise of runtime system, can obtain best system saving electricity rate, the extensibility of system is good, greatly reduces air-conditioning operating personnel and maintenance personal's labour intensity.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1 a: the schematic diagram of freezing water system of central air conditioner;
Fig. 1 b: the schematic diagram of central air-conditioning cooling water system;
Fig. 2: the principle schematic of electricity-saving appliance centralized management system.
The implication of each Reference numeral sees the following form among the figure:
| Reference numeral | Implication | Reference numeral | Implication | Reference | Implication | |
| 101 | The 1# air- |
102 | The 2# air- |
103 | The 3# air-conditioner host |
| Reference numeral | Implication | Reference numeral | Implication | | Implication | |
| 104 | The 4# air- |
111 | The chilled water water |
112 | The chilled |
|
| 113 | The chilled |
121 | Chilled water is for the current differential pressure pickup between the return main | 131 | Cooling-water temperature sensor on the main frame chilled |
|
| 132 | Cooling-water temperature sensor on the water |
133 | Cooling-water temperature sensor on the water |
134 | Cooling-water temperature sensor before the |
|
| 135 | Cooling-water temperature sensor on the 1# air-conditioner host chilled |
136 | Cooling-water temperature sensor on the 2# air-conditioner host chilled |
137 | Cooling-water temperature sensor on the 3# air-conditioner host chilled |
|
| 138 | Cooling-water temperature sensor on the 4# air-conditioner host chilled |
141 | Chilled water circling water |
142 | Chilled water circling water |
|
| 211 | The 1# air- |
212 | The 2# air- |
213 | The cooling |
|
| 221 | Cooling-water temperature sensor on the 1# air-conditioner host cooling |
222 | Cooling-water temperature sensor on the 2# air-conditioner host cooling |
223 | Cooling-water temperature sensor on the 3# air-conditioner host cooling |
|
| 224 | Cooling-water temperature sensor on the 4# air-conditioner host cooling |
225 | Cooling-water temperature sensor on the air-conditioner host cooling water water inlet manifold | 1 | Sensor | |
| 2 | Electricity-saving appliance | 31 | The signal sorting module | 32 | Collecting unit | |
| 33 | |
34 | Data processing unit | 35 | Data processing unit | |
| 36 | Central control unit | 37 | The backstage computing | 38 | The Bypass Control unit | |
| 39 | Communication unit | 30 | The electricity-saving appliance control module | 4 | |
|
| 41 | The central control room data processing unit | 42 | Communication unit |
The specific embodiment
The system of the electricity-saving appliance centralized management of central air-conditioning, comprise central switch board, fuzzy controller and sensor, as Fig. 1 chilled water system, 1# air-conditioner host 101,2# air-conditioner host 102,3# air-conditioner host 103 and 4# air-conditioner host 104, confession in chilled water system, be provided with current differential pressure pickup 121 between the return main, current differential pressure pickup 121 is contained between chilled water water knockout drum 111 and the chilled water water collector 112, cooling-water temperature sensor 132 and cooling-water temperature sensor 133 are housed on water knockout drum 111 outlets, be respectively equipped with flowmeter 141 and flowmeter 142 on the two-way chilled water return pipe, between chilled water water collector 112 and chilled water water pump 113, cooling-water temperature sensor 134 is housed, be respectively equipped with cooling-water temperature sensor on chilled water water pump 113 way of escape chilled water return pipes, it is the cooling-water temperature sensor 135 on the 1# air-conditioner host chilled water return pipe, cooling-water temperature sensor 136 on the 2# air-conditioner host chilled water return pipe, cooling-water temperature sensor 137 on the 3# air-conditioner host chilled water return pipe, cooling-water temperature sensor 138 on the 4# air-conditioner host chilled water return pipe, air-conditioner host chilled water outlet pipe is provided with cooling-water temperature sensor 131.As Fig. 2 cooling water system, on the air-conditioner host cooling water outlet pipe, be provided with cooling-water temperature sensor, be the cooling-water temperature sensor 221, the cooling-water temperature sensor 222 on the 2# air-conditioner host cooling water outlet pipe, the cooling-water temperature sensor 223 on the 3# air-conditioner host cooling water outlet pipe, the cooling-water temperature sensor 224 on the 4# air-conditioner host cooling water outlet pipe on the 1# air-conditioner host cooling water outlet pipe, also be provided with cooling-water temperature sensor 225 on the air-conditioner host cooling water water inlet manifold, cooling-water temperature sensor 225 is installed between 1# air-cooler 211,2# air-cooler 212 and the cooling water water pump 213.Every flowmeter, cooling-water temperature sensor and current differential pressure pickup all are connected with fuzzy controller, by LAN electricity-saving appliance is connected with central switch board, adopt the RS485 protocol communication, the switching of remote controlled every electricity-saving appliance, temperature sensor is gathered water pump and is imported and exported coolant-temperature gage, central authorities' switch board is calculated and is controlled respectively each electricity-saving appliance by the temperature, pressure and the flow value that collect and reaches the required optimum frequency of its current time, electricity-saving appliance control fan speed and pump capacity, central switch board statistics also shows each electricity-saving appliance amount of electricity saving and total amount of electricity saving.The utilization FUZZY ALGORITHMS FOR CONTROL by the closed loop feedback of water pump out temperature and compressor flow, realizes the control to pump capacity and fan speed.
Start central air conditioner system by central switch board, temperature parameter is delivered to each blower fan and water pump by communication module, behind blower fan and the starting mode of pump, chilled water system is for the current differential pressure pickup between the return main, cooling-water temperature sensor behind the water pump on the two-way chilled water return pipe, cooling-water temperature sensor on the main frame chilled water outlet pipe, flowmeter on the two-way chilled water return pipe, cooling-water temperature sensor on cooling-water temperature sensor on the main frame cooling water outlet pipe and the cooling water water inlet manifold, gather the pressure reduction of correspondence position respectively, flow velocity, water temperature, the collection value is sent to fuzzy controller, fuzzy controller adopts fuzzy prediction method model and optimizes algorithm model control and obtains dynamic flow and speed parameter, and send each electricity-saving appliance to, control the speed and the flow of corresponding blower fan and water pump by the variation of electricity-saving appliance frequency, reach the purpose of dynamic real-time control central air conditioner system.
During concrete the application, after the startup of original motor switch board finishes, send instruction variable frequency starting chilled water water pump by fuzzy controller to corresponding electricity-saving appliance, cooling water water pump and air-cooler, fuzzy controller is according to the real time data of gathering and the history data of system, calculating load needs with refrigerating capacity and optimum temperature, the temperature difference, pressure reduction and flow value, and make comparisons with detected actual parameter, rotating speed according to its deviate control electricity-saving appliance adjusting chilled water water pump changes the supply and return water temperature that its flow makes chilled water system, pressure reduction and flow are tending towards the given optimal value of fuzzy controller.While is according to the control parameter value of fuzzy controller output, each electricity-saving appliance is regulated the output frequency of corresponding cooling water pump variable frequency device, the rotating speed of control cooling water water pump, the flow of dynamic adjustments cooling water, make the given optimal value of import and export temperature approaches fuzzy controller of cooling water, fuzzy controller is set the minimum operation frequency of cooling water water pump, and the determinated low limit frequency values is the water pump operation frequency that is slightly larger than central air conditioner main machine cooling water correspondence when allowing minimum flow.
Air-cooler starts the control parameter value that fuzzy controller output is pressed in the back, electricity-saving appliance is dynamically adjusted operation platform number, running time and the speed of air-cooler, make the inlet temperature of cooling water approach the given optimal value of fuzzy controller, make cooling water inlet temperature guarantee that air-conditioner host is in optimal operating condition.
During unit operation; if the chilled water outlet temperature that sensor is gathered, flow, occur unusual or cooling water outlet temperature when surpassing high limit temperature for backwater pressure reduction; system makes alarm signal and takes the corresponding protection measure, guarantees that the safety of air-conditioner host is normally moved.
By the man-machine interface of central switch board realize central air conditioner system startup, stop, the switching of any water pump, blower fan and electricity-saving appliance, carry out air-conditioner temperature parameter, the setting of Temperature Fuzzy Control parameter, show states such as operation, fault, warning, show power consumption, amount of electricity saving and the power saving rate of amount of electricity saving, power saving rate and the central air conditioner system of each electricity-saving appliance.
The control principle of electricity-saving appliance centralized management system shown in Figure 2, sensor 1 comprises temperature sensor, pressure sensor and flow sensor, temperature, pressure and flow sensor 1 move feedback and status monitoring, temperature, pressure and flow sensor 1 are gathered water temperature, pressure reduction and flow signal, through 31 arrangements of signal sorting module, signals collecting is arrived data acquisition unit 32, to gather signal through signal conversion unit 33 and deliver to data processing unit 34, the data that data processing unit 34 is handled pass to central control unit 36, by backstage arithmetic element 37 carry out the backstage calculation process and by CPU 36 with various information, comprise that fault shows, operation shows, failure logging, log, the information of alarm indication is presented at man-machine interface, data processing unit 34 is returned in backstage operation result transmission, data processing unit 34 output control signals are given output control unit 35, output control unit 35 is by the frequency of electricity-saving appliance control module 30 each electricity-saving appliances 2 of control, reaches the speed of blower fan water pump of real-time control dragging system and the purpose of flow.In addition, the man-machine interface of central control room 4 carry out central air conditioner system startup, stop, carry out the switching of any water pump, blower fan and electricity-saving appliance, carry out air-conditioner temperature parameter, the setting of Temperature Fuzzy Control parameter, the data of being handled by central control room data processing unit 41 send communication unit 39 to through communication unit 42; Bypass Control unit 38 is also controlled the execution of system.Thereby, finally control central air conditioner system and reach best power savings.
In sum, it is good that the present invention designs uniqueness, temperature adjustment precision height, dynamic property, and blower fan water pump often is not in full rotating speed operation, and mechanical loss is little, full-automatic remote monitoring, temperature closed loop control, soft starter for motor, soft stopping to the impact of electrical network, reduce the noise of runtime system when having eliminated electric motor starting, can obtain best system saving electricity rate, extensibility is good, and economic benefit and social effect are remarkable, and is very practical.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (4)
1. the system of the electricity-saving appliance of central air-conditioning centralized management, comprise central switch board, fuzzy controller and sensor, it is characterized in that: between the confession of freezing water system of central air conditioner, return main, be provided with the current differential pressure pickup, be respectively equipped with flowmeter on the two-way chilled water return pipe, be respectively equipped with cooling-water temperature sensor on the chilled water water pump way of escape chilled water return pipe, air-conditioner host chilled water outlet pipe is provided with cooling-water temperature sensor; On the air-conditioner host cooling water outlet pipe, cooling-water temperature sensor is installed, on the air-conditioner host cooling water water inlet manifold cooling-water temperature sensor is installed also; Described flowmeter, cooling-water temperature sensor and current differential pressure pickup all are connected with fuzzy controller, by LAN electricity-saving appliance are connected with central switch board, adopt the RS485 protocol communication.
2. the method for the electricity-saving appliance of the described central air-conditioning of claim 1 centralized management, it is characterized in that: by the current differential pressure pickup between the confession return main of freezing water system of central air conditioner, flowmeter on the two-way chilled water return pipe, cooling-water temperature sensor on the chilled water water pump way of escape chilled water return pipe, cooling-water temperature sensor on the air-conditioner host chilled water outlet pipe, cooling-water temperature sensor on cooling-water temperature sensor on the air-conditioner host cooling water outlet pipe and the air-conditioner host cooling water water inlet manifold, gather the pressure reduction of correspondence position respectively, flow velocity, water temperature, the collection value is sent to fuzzy controller, fuzzy controller adopts fuzzy prediction method model and optimizes algorithm model control and obtains dynamic flow and speed parameter, and send each electricity-saving appliance to, control the speed and the flow of corresponding blower fan and water pump by the variation of electricity-saving appliance frequency; Specifically comprise following detailed step---
(a) send instruction variable frequency starting chilled water water pump, cooling water water pump and air-cooler by fuzzy controller to corresponding electricity-saving appliance, fuzzy controller is according to the real time data of gathering and the history data of system, calculating load needs with refrigerating capacity and optimum temperature, the temperature difference, pressure reduction and flow value, and make comparisons with detected actual parameter, regulate the rotating speed of chilled water water pump according to its deviate control electricity-saving appliance, change supply and return water temperature, the temperature difference, pressure reduction and the flow that its flow makes chilled water system and be tending towards the given optimal value of fuzzy controller;
(b) the control parameter value of exporting according to fuzzy controller, each electricity-saving appliance is regulated the output frequency of corresponding cooling water pump variable frequency device, the rotating speed of control cooling water water pump, the flow of dynamic adjustments cooling water makes the given optimal value of import and export temperature approaches fuzzy controller of cooling water;
(c) according to the control parameter value of fuzzy controller output, electricity-saving appliance is dynamically adjusted operation platform number, running time and the speed of air-cooler, makes the inlet temperature of cooling water approach the given optimal value of fuzzy controller.
3. the method for the electricity-saving appliance of central air-conditioning according to claim 2 centralized management, it is characterized in that: fuzzy controller is set the minimum operation frequency of cooling water water pump, and the determinated low limit frequency values is the water pump operation frequency that is slightly larger than central air conditioner main machine cooling water correspondence when allowing minimum flow.
4. the method for the electricity-saving appliance of central air-conditioning according to claim 2 centralized management, it is characterized in that: the man-machine interface of central switch board carry out central air conditioner system startup, stop, carry out the switching of any water pump, blower fan and electricity-saving appliance, carry out air-conditioner temperature parameter, the setting of Temperature Fuzzy Control parameter, show operation, fault, alarm condition, show power consumption, amount of electricity saving and the power saving rate of amount of electricity saving, power saving rate and the central air conditioner system of each electricity-saving appliance.
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| CNA2007101333647A CN101140096A (en) | 2007-10-18 | 2007-10-18 | electricity economizer centralized management method and system of central air-conditioning |
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| CNA2007101333647A CN101140096A (en) | 2007-10-18 | 2007-10-18 | electricity economizer centralized management method and system of central air-conditioning |
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| CN106091295A (en) * | 2016-07-28 | 2016-11-09 | 苏州华爱电子有限公司 | A kind of energy-conservation long distance temperature measurement device for splitting air conditioner |
| CN106642535A (en) * | 2016-11-16 | 2017-05-10 | 珠海格力电器股份有限公司 | Central air-conditioning cold site control system and control method |
| CN106642535B (en) * | 2016-11-16 | 2019-06-18 | 珠海格力电器股份有限公司 | A kind of cold station control system of central air-conditioning and control method |
| CN107940672A (en) * | 2017-07-24 | 2018-04-20 | 江苏永钢集团有限公司 | A kind of central air-conditioning alarm method based on PLC |
| CN107289656A (en) * | 2017-08-08 | 2017-10-24 | 珠海格力电器股份有限公司 | Screw-type water chiller |
| 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 |
| CN113465225A (en) * | 2020-03-31 | 2021-10-01 | Lg电子株式会社 | Heat pump and operation method thereof |
| CN113465225B (en) * | 2020-03-31 | 2023-06-20 | Lg电子株式会社 | Heat pump and operation method thereof |
| CN114087723A (en) * | 2021-09-30 | 2022-02-25 | 中建三局第三建设工程有限责任公司 | Flow monitoring method and device for refrigerating unit |
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