CN2578712Y - Central hot water supply pump frequency variable controller of central air conditioner - Google Patents
Central hot water supply pump frequency variable controller of central air conditioner Download PDFInfo
- Publication number
- CN2578712Y CN2578712Y CN 03200411 CN03200411U CN2578712Y CN 2578712 Y CN2578712 Y CN 2578712Y CN 03200411 CN03200411 CN 03200411 CN 03200411 U CN03200411 U CN 03200411U CN 2578712 Y CN2578712 Y CN 2578712Y
- Authority
- CN
- China
- Prior art keywords
- water pump
- frequency converter
- cooling water
- programmable logic
- logic controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a frequency variable controller for a concentrated hot-water supply pump of a central air conditioner, which can enhance energy saving efficiency and safety. The frequency variable controller comprises a frequency changer of a freezing water pump, a frequency changer of a cooling water pump, a programmable controller, a sensor used for measuring an inlet and an outlet of the freezing water pump and a sensor used for measuring an inlet and an outlet of the cooling water pump, wherein, the signal output ends of the sensors are connected with the signal input end of the programmable controller, and the programmable controller is provided with an output end which is connected with the frequency changer of the freezing water pump and the frequency changer of the cooling water pump and is used for controlling signals. The utility model is characterized in that the frequency variable controller is also provided with an outdoor temperature sensor used for measuring outdoor temperature, and the outdoor temperature controller is connected with the programmable controller.
Description
Technical field
The utility model belongs to central air-conditioning central heating control device field, especially central air-conditioning central heating pump variable frequency control device.
Background technology
Central air-conditioning central heating system energy consumption equipment is except the cooling and warming unit, and just the power consumption of number water pump is maximum, accounts for the 15-20% of air-conditioning power consumption electric weight, and cooling and warming unit control itself is fairly perfect, so water pump just becomes the object of energy-conservation consideration.On air-conditioner water system, the regulation technology that adopts is for becoming water pump platform number, variable frequency pump control at present.Become water pump platform numerical control system and can only realize very rough energy-conservationly, easy and simple to handle, do not need extra means, system has considered in the time of design that variable frequency pump is divided into pressure reduction control according to the control signal source and temperature is controlled.
Two kinds of variable frequency pump control modes compare: pressure reduction control applicable surface is narrow, can only be applied to the system that air-conditioner tail end equipment capable has the motorized adjustment device, otherwise the pressure reduction of system is constant, can not be as control signal.Pressure reduction control is energy-conservation not as good as temperature difference control, and pressure difference signal changes certainty of measurement and the terminal heat dissipation equipment control effect that depends on pressure sensor, and it is bigger to control the dead band usually.
Fixed difference difference control is all adopted in temperature difference control at present, can only be applicable to the system that supply water temperature does not change and load fluctuation can not be excessive of system.Its control analysis source is to the analysis of summer air-conditioning operating mode, and supply water temperature changes not quite substantially, the supply and return water temperature difference greatly in 5 ℃, fixed difference difference control can be rough adaptive system.And in fact, the system loading fluctuation is apparent in view.In addition, because the heat dissipation characteristics of heat dissipation equipment own, when load increased, supply water temperature required to increase, and return water temperature also can increase accordingly, but supply backwater temperature difference but increases, rather than unalterable, at this moment adopted fixed difference difference control that certain limitation is just arranged.Variation when the coldest 60 ℃/45 ℃ of heating period in the winter time particularly, supply water temperature during by beginning 40 ℃/32 ℃.Supply backwater temperature difference becomes 15 ℃ by 8 ℃.If system's temperature difference is made as 8 ℃, when system loading further increased, the fixed difference difference VFC then can not be energy-conservation, if system's temperature difference is made as 15 ℃, then system because of excessive temperature differentials can not satisfy system requirements, causes energy waste when workload demand is little.
The utility model content
The purpose of this utility model provides a kind of central air-conditioning central heating pump variable frequency control device that can improve energy-saving efficiency and degree of safety.
The technical solution of the utility model is: central air-conditioning central heating pump variable frequency control device, comprise the chilled water pump frequency converter, the cooling water pump frequency converter, Programmable Logic Controller, be used to measure chilled water pump sensor of importing and exporting and the sensor that is used to measure the cooling water pump import and export, the signal output part of described sensor is connected with the signal input part of Programmable Logic Controller, Programmable Logic Controller has the output of the control signal that links to each other with the cooling water pump frequency converter with the chilled water pump frequency converter, it is characterized in that also being provided with the outdoor temperature sensor that is used to measure outdoor temperature, described outdoor temperature sensor links to each other with Programmable Logic Controller.
Described chilled water pump frequency converter and cooling water pump frequency converter are respectively arranged with the frequency converter switching device shifter.
Described frequency converter switching device shifter is formed by contactor or relay assembly.
Effect of the present utility model is: the Programmable Logic Controller that the utility model adopts is a kind of industrial specialty control computer, and it integrates data processing, programme-control, parameter adjusting and data communication function.Reputable brand has: the Schneider of the ALLEN-BRADLEY of the U.S., France etc.The utility model is a core with the Programmable Logic Controller with programmable functions, variation by water temperature and air themperature in the various sensors detection central air conditioner systems, utilization is arranged on central air-conditioning expertise knowledge base and the control program in the Programmable Logic Controller, can realize central air conditioner water pump is carried out fuzzy control and PID adjusting control, make the whole system co-ordination, automatically the variation of adaptive system refrigeration duty effectively, system is moved under the high efficiency state, realize energy-conservation to greatest extent.In addition, can improve the characteristic of control system, can the generation system not shake, refrigeration, heating machine set can not occur because of the cold excessively operation troubles that occurs, can be because of undercurrent does not measure existing warning yet, it is not enough that air-conditioned room also can comfort level not occur because of changes in flow rate.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the program flow chart of the utility model Programmable Logic Controller.
The specific embodiment
Among Fig. 1, central air-conditioning central heating pump variable frequency control device, comprise the chilled water pump frequency converter, the cooling water pump frequency converter, Programmable Logic Controller, be used to measure chilled water pump sensor of importing and exporting and the sensor that is used to measure the cooling water pump import and export, the signal output part of described sensor is connected with the signal input part of Programmable Logic Controller, Programmable Logic Controller has the output of the control signal that links to each other with the cooling water pump frequency converter with the chilled water pump frequency converter, Programmable Logic Controller links to each other with cooling water pump motor frequency conversion device with chilled water pump motor frequency conversion device respectively, also be provided with the outdoor temperature sensor that is used to measure outdoor temperature, described outdoor temperature sensor links to each other with Programmable Logic Controller, and touch-screen links to each other with Programmable Logic Controller as the control data input unit.Described chilled water pump frequency converter and cooling water pump frequency converter are respectively arranged with the frequency converter switching device shifter.Described frequency converter switching device shifter is formed by contactor or relay assembly.
Among Fig. 2, be provided with central air-conditioning expertise database and control program in the Programmable Logic Controller of this device, program circuit is one ambient parameter and system mode is analyzed, judge, handle and the final process of determining operating states of the units, specifically describe as follows: after device starts, whole system is carried out initialization, various quantity of states of various analog signalses of real-time acquisition system and system then, the expert experience base that is arranged in the Programmable Logic Controller carries out fuzzy reasoning calculating to the real time data of gathering, judge and calculate the load of current system, when coolant quantity during less than the thermic load amount, then accelerate cooling, the rotating speed of refrigerating water pump, otherwise, then reduce cooling, the rotating speed of refrigerating water pump.
Claims (3)
1, central air-conditioning central heating pump variable frequency control device, comprise the chilled water pump frequency converter, the cooling water pump frequency converter, Programmable Logic Controller, be used to measure chilled water pump sensor of importing and exporting and the sensor that is used to measure the cooling water pump import and export, the signal output part of described sensor is connected with the signal input part of Programmable Logic Controller, Programmable Logic Controller has the output of the control signal that links to each other with the cooling water pump frequency converter with the chilled water pump frequency converter, it is characterized in that also being provided with the outdoor temperature sensor that is used to measure outdoor temperature, described outdoor temperature sensor links to each other with Programmable Logic Controller.
2, central air-conditioning central heating pump variable frequency control device according to claim 1 is characterized in that described chilled water pump frequency converter and cooling water pump frequency converter are respectively arranged with the frequency converter switching device shifter.
3, central air-conditioning central heating pump variable frequency control device according to claim 2 is characterized in that described frequency converter switching device shifter is formed by contactor or relay assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200411 CN2578712Y (en) | 2003-01-08 | 2003-01-08 | Central hot water supply pump frequency variable controller of central air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200411 CN2578712Y (en) | 2003-01-08 | 2003-01-08 | Central hot water supply pump frequency variable controller of central air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2578712Y true CN2578712Y (en) | 2003-10-08 |
Family
ID=33752879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03200411 Expired - Fee Related CN2578712Y (en) | 2003-01-08 | 2003-01-08 | Central hot water supply pump frequency variable controller of central air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2578712Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297787C (en) * | 2004-07-20 | 2007-01-31 | 贵州华城楼宇科技有限公司 | Chilled water energy-saving apparatus of cental air conditioner |
| CN100549895C (en) * | 2003-11-18 | 2009-10-14 | 乐普四方（北京）节能技术有限公司 | Intelligent energy-saving device |
| CN102168877A (en) * | 2011-03-01 | 2011-08-31 | 深圳达实智能股份有限公司 | Load prediction based group control method and device for central air-conditioning system |
| WO2012048443A1 (en) * | 2010-10-13 | 2012-04-19 | 日滔贸易（上海）有限公司 | Energy-saving optimized control system and method for refrigeration plant room |
| CN106168404A (en) * | 2016-07-13 | 2016-11-30 | 昆山台佳机电有限公司 | The secondary pump air-conditioner water system flow-changing control method of temperature difference correction and device |
-
2003
- 2003-01-08 CN CN 03200411 patent/CN2578712Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100549895C (en) * | 2003-11-18 | 2009-10-14 | 乐普四方（北京）节能技术有限公司 | Intelligent energy-saving device |
| CN1297787C (en) * | 2004-07-20 | 2007-01-31 | 贵州华城楼宇科技有限公司 | Chilled water energy-saving apparatus of cental air conditioner |
| WO2012048443A1 (en) * | 2010-10-13 | 2012-04-19 | 日滔贸易（上海）有限公司 | Energy-saving optimized control system and method for refrigeration plant room |
| GB2498275A (en) * | 2010-10-13 | 2013-07-10 | Weldtech Technology Shanghai Co Ltd | Energy-saving optimized control system and method for refrigeration plant room |
| US9423172B2 (en) | 2010-10-13 | 2016-08-23 | Weldtech Technology (Shanghai) Co., Ltd. | Energy-saving optimized control system and method for refrigeration plant room |
| GB2498275B (en) * | 2010-10-13 | 2018-02-28 | Weldtech Tech Shanghai Co Ltd | Energy-saving optimized control system and method for chiller plant room |
| CN102168877A (en) * | 2011-03-01 | 2011-08-31 | 深圳达实智能股份有限公司 | Load prediction based group control method and device for central air-conditioning system |
| CN102168877B (en) * | 2011-03-01 | 2013-06-12 | 深圳达实智能股份有限公司 | Load prediction based group control method and device for central air-conditioning system |
| CN106168404A (en) * | 2016-07-13 | 2016-11-30 | 昆山台佳机电有限公司 | The secondary pump air-conditioner water system flow-changing control method of temperature difference correction and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102721156B (en) | Central air-conditioning self-optimization intelligent fuzzy control device and control method thereof | |
| CN102012077B (en) | Energy-saving control system and control method of central air conditioning freezing station | |
| CN100487332C (en) | Energy-saving intelligent control system for central air conditioner | |
| CN103277875B (en) | Energy-saving control system for refrigeration plant room | |
| CN100523635C (en) | Intelligent cluster control system of central air-conditioning | |
| CN2898692Y (en) | Intelligent energy-saving control system of central air conditioner | |
| CN103375878A (en) | Group control method for central air conditioning refrigerating unit | |
| CN202734154U (en) | Central air conditioning self-optimization intelligent fuzzy control device | |
| CN105444356A (en) | Intelligent energy efficiency optimizing control system for central air conditioning system and control method of intelligent energy efficiency optimizing control system | |
| CN201129827Y (en) | Central air conditioner control equipment | |
| CN201885354U (en) | Energy-saving central air-conditioning system | |
| CN113915719B (en) | Real-time frequency conversion control method and controller for central air-conditioning water pump | |
| CN201059715Y (en) | Central air-conditioning freezing stations quality regulating control system | |
| CN201014677Y (en) | Central air-conditioning intelligent group control device | |
| CN2472116Y (en) | Fuzzy control energy saver for central air conditioner | |
| CN201964577U (en) | Energy-saving control system for central air conditioner | |
| CN203464410U (en) | Energy-saving device for controlling heating and cooling of central air conditioner | |
| CN2578712Y (en) | Central hot water supply pump frequency variable controller of central air conditioner | |
| CN212132815U (en) | Intelligent cold station control system | |
| CN2842275Y (en) | Can change self-regulating central air-conditioning energy-saving system according to cooling load | |
| CN203385145U (en) | Intelligent energy-saving control device based on central air-conditioner | |
| CN210441402U (en) | Automatic control device of air conditioning system | |
| CN201476187U (en) | Dynamic energy saving system of central air-conditioning | |
| CN201875843U (en) | Digital and intelligent power-saving device for central air-conditioner | |
| CN203024338U (en) | Energy-saving control device of central air conditioner and central air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |