CN2771712Y - Energy-saving control system for central air conditioner - Google Patents
Energy-saving control system for central air conditioner Download PDFInfo
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- CN2771712Y CN2771712Y CN 200520040395 CN200520040395U CN2771712Y CN 2771712 Y CN2771712 Y CN 2771712Y CN 200520040395 CN200520040395 CN 200520040395 CN 200520040395 U CN200520040395 U CN 200520040395U CN 2771712 Y CN2771712 Y CN 2771712Y
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- cooling water
- central air
- chilled water
- frequency converter
- cooling
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- Air Conditioning Control Device (AREA)
Abstract
The utility model relates to an energy-saving control system for central air conditioners. In the system, temperature sensors for a freezing water inlet and a freezing water outlet are arranged on a freezing water subsystem pipeline, temperature sensors for a cooling water inlet and a cooling water outlet are arranged on a cooling water subsystem pipeline, the sensors are respectively connected with frequency converters of relevant water pump motors through corresponding subtracters and isolators, and a pump of a water freezing system and a pump and a fan of a water cooling system are respectively controlled by the frequency converters. The utility model utilizes many parameters for regulating the flow quantity of delivered liquid and air. The energy of the motors is saved, and the efficiency of a main machine is improved.
Description
Technical field
The utility model relates to central air-conditioning, particularly the central air-conditioning energy control system.
Background technology
The Energy Saving Control of existing central air conditioner system water pump is to adopt single parameter such as temperature or pressure as control signal on controlled water pump mostly, regulates frequency converter frequency, and the control pump rotary speed changes and carries fluid flow, to reach energy-conservation purpose.The energy-conservation amplitude of this kind control method is limited.So the technology that adopts many reference amounts that central air conditioner system is controlled occurred, but all be to utilize programmable controller etc. that frequency converter is controlled in these implementations, central air conditioner main machine efficient is low.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of central air-conditioning energy control system is provided, and to realize utilizing a plurality of parameter regulation and control to carry liquid and air mass flow, saves motor power, improves main frame efficient.
For achieving the above object, the utility model provides a kind of central air-conditioning energy control system, comprises central air conditioner main machine, chilled water subsystem and cooling water subsystem.Wherein the chilled water subsystem is provided with diversion box, header tank and chilled water pump group, and the cooling water subsystem is provided with cooling tower, blower fan of cooling tower and cooling water pump group.The chilled water outlet water pipe of described central air conditioner main machine is connected with each user side through diversion box, the chilled water pipe that returns from user side is connected with the chilled water pump group through header tank, this chilled water pump group is connected with the chilled water return pipe of central air conditioner main machine, forms the chilled water closed cycle.The coolant outlet water pipe of described central air conditioner main machine is connected with cooling tower, and cooling tower is connected with the cooling water pump group through cooling water pipe, and this cooling water pump group is connected with the cooling water inlet water pipe of central air conditioner main machine, forms the cooling water closed cycle.The characteristics of this central air-conditioning energy control system are:
The chilled water import and export water pipe of described central air conditioner main machine is respectively equipped with chilled water inlet temperature sensor, chilled water outlet temperature sensor, and cooling water import and export water pipe is respectively equipped with cooling water inlet temperature sensor, cooling water outlet temperature sensor; Wherein
Described chilled water import and export temperature sensor connects first frequency converter through signal subtraction device, first isolator, and this frequency converter is connected with the chilled water pump group by threephase cable;
Described cooling water outlet temperature sensor connects second frequency converter through second isolator, and this frequency converter is connected with the cooling water pump group by threephase cable;
Described cooling water inlet temperature sensor connects the 3rd frequency converter through the 3rd isolator, and this frequency converter is connected with blower fan of cooling tower by threephase cable;
Dc source links to each other with the power end of each temperature sensor, subtracter, isolator and frequency converter respectively.
Described each frequency converter is provided with comparison circuit, PI proportional integral circuit and frequency changer circuit.
The utility model is by mounting temperature sensor on pipeline, by subtracter, isolator is handled signal, again through the comparison circuit of frequency converter, the proportional integral circuit, frequency converter is controlled respectively the pump of chilled water system and the pump and the blower fan of cooling water system, thereby realize utilizing a plurality of parameters such as the out temperature of chilled water subsystem and cooling water subsystem out temperature, regulation and control chilled water subsystem, the liquid and the air mass flow of cooling water subsystem and blower fan of cooling tower heat radiation supply air system, the energy that each subsystem is carried can be regulated with the demand of user side in real time, to save motor power, reduced the positive energy exchange that enters central air conditioner main machine evaporimeter and condenser simultaneously, central air conditioner main machine operation unloading amplitude is increased, improved main frame efficient.The utility model adopts the supporting use of simple subtracter, isolator and frequency converter in addition, and control circuit is simple.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Description of drawings
Fig. 1 is a connection state schematic diagram of the present utility model.
The specific embodiment
As shown in Figure 1, the utility model central air-conditioning energy control system comprises central air conditioner main machine 1, chilled water subsystem and cooling water subsystem.Wherein the chilled water subsystem is provided with diversion box 2, header tank 3 and chilled water pump group 4, and the cooling water subsystem is provided with cooling tower 5, blower fan of cooling tower 6 and cooling water pump group 7.The chilled water outlet water pipe of central air conditioner main machine 1 is connected with each user side through the diversion box 2 of chilled water subsystem, the chilled water pipe that returns from user side is connected with chilled water pump group 4 through header tank 3, this chilled water pump group 4 is connected with the chilled water return pipe of central air conditioner main machine 1, forms the chilled water closed cycle.The coolant outlet water pipe of central air conditioner main machine 1 is connected through the cooling tower 5 of cooling water subsystem, cooling tower 5 is connected with cooling water pump group 7 through cooling water pipe, this cooling water pump group 7 is connected with the cooling water inlet water pipe of central air conditioner main machine 1, forms the cooling water closed cycle.
The chilled water import and export water pipe of central air conditioner main machine 1 is respectively equipped with chilled water inlet temperature sensor 8, chilled water outlet temperature sensor 9.This chilled water import and export temperature sensor 8,9 is connected to signal subtraction device 10 by signal cable, be connected to first isolator 11 by signal cable again, these isolator 11 outputs are connected to first frequency converter 12 by signal cable, and this frequency converter 12 is connected with chilled water pump group 4 by threephase cable.
The cooling water import and export water pipe of central air conditioner main machine 1 is respectively equipped with cooling water inlet temperature sensor 13, cooling water outlet temperature sensor 14.This cooling water outlet temperature sensor 14 is connected to second isolator 15 by signal cable, and these isolator 15 outputs are connected to second frequency converter 16 by signal cable, and this frequency converter 16 is connected with cooling water pump group 7 by threephase cable.Cooling water inlet temperature sensor 13 is connected to the 3rd isolator 17 by signal cable, and these isolator 17 outputs are connected to the 3rd frequency converter 18 by signal cable, and this frequency converter 18 is connected with blower fan of cooling tower 6 by threephase cable.
Described each frequency converter is provided with comparison circuit, PI proportional integral circuit and frequency changer circuit.Dc source links to each other with the power end of each temperature sensor, subtracter, isolator and frequency converter respectively by cable.
In the chilled water subsystem of central air-conditioning energy control system, setting signal is imported comparison circuit in first frequency converter 12, generally with chilled water import and outlet temperature difference be 4～6 ℃ as setting signal, chilled water advances, outlet temperature sensor 8,9 signal is sent into signal subtraction device 10, the comparator of signal through first isolator 11 is sent into first frequency converter 12 as error feedback signal in of these subtracter 10 outputs compares, and through the proportional integral circuit computing, the result sends into the frequency changer circuit in first frequency converter 12, mutagenic frequency, promptly send into chilled water pump group 4 and regulate its running frequency, control chilled water subsystem flow by threephase cable.
In the cooling water subsystem of central air-conditioning energy control system, cooling water is set to 30～32 ℃ according to the general inflow temperature of system requirements, and leaving water temperature is set to 34～37 ℃.34～37 ℃ of setting signals are imported comparison circuit in second frequency converter 16, the comparison circuit of the signal of cooling water outlet temperature sensor 14 through second isolator 15 is sent into second frequency converter 16 as error feedback signal in compares, and through the proportional integral circuit computing, the result sends into the frequency changer circuit in second frequency converter 16, mutagenic frequency, send into cooling water pump group 7 by threephase cable again and regulate its running frequency, control cooling water subsystem flow.30～32 ℃ of setting signals are imported comparison circuit in the 3rd frequency converter 18, the comparison circuit of the signal of cooling water inlet temperature sensor 13 through the 3rd isolator 17 is sent into the 3rd frequency converter 18 as error feedback signal in compares, and through relatively integrating circuit computing, the result sends into the frequency changer circuit in the 3rd frequency converter 18, mutagenic frequency, send into blower fan of cooling tower 6 by threephase cable again and regulate its running frequency, regulate cooling tower 5 cooling air quantities.
When central air-conditioner host 1 was used to heat, the chilled water subsystem was the warm water subsystem, and situation was identical when its control situation was freezed with central air conditioner main machine 1.
Claims (2)
1, a kind of central air-conditioning energy control system, comprise central air conditioner main machine (1), chilled water subsystem and cooling water subsystem, wherein the chilled water subsystem is provided with diversion box (2), header tank (3) and chilled water pump group (4), and the cooling water subsystem is provided with cooling tower (5), blower fan of cooling tower (6) and cooling water pump group (7); The chilled water outlet water pipe of described central air conditioner main machine (1) is connected with each user side through diversion box (2), the chilled water pipe that returns from user side is connected with chilled water pump group (4) through header tank (3), and this chilled water pump group (4) is connected with the chilled water return pipe of central air conditioner main machine (1); The coolant outlet water pipe of described central air conditioner main machine (1) is connected with cooling tower (5), and cooling tower (5) is connected with cooling water pump group (7) through cooling water pipe, and this cooling water pump group (7) is connected with the cooling water inlet water pipe of central air conditioner main machine (1); It is characterized in that:
The chilled water import and export water pipe of described central air conditioner main machine (1) is respectively equipped with chilled water inlet temperature sensor (8), chilled water outlet temperature sensor (9), and cooling water import and export water pipe is respectively equipped with cooling water inlet temperature sensor (13), cooling water outlet temperature sensor (14); Wherein
Described chilled water import and export temperature sensor (8), (9) connect first frequency converter (12) through signal subtraction device (10), first isolator (11), and this frequency converter (12) is connected with chilled water pump group (4) by threephase cable;
Described cooling water outlet temperature sensor (14) connects second frequency converter (16) through second isolator (15), and this frequency converter (16) is connected with cooling water pump group (7) by threephase cable;
Described cooling water inlet temperature sensor (13) connects the 3rd frequency converter (18) through the 3rd isolator (17), and this frequency converter (18) is connected with blower fan of cooling tower (6) by threephase cable;
Dc source links to each other with the power end of each temperature sensor, subtracter, isolator and frequency converter respectively.
2, central air-conditioning energy control system according to claim 1 is characterized in that described each frequency converter is provided with comparison circuit, PI proportional integral circuit and frequency changer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040395 CN2771712Y (en) | 2005-03-25 | 2005-03-25 | Energy-saving control system for central air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040395 CN2771712Y (en) | 2005-03-25 | 2005-03-25 | Energy-saving control system for central air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2771712Y true CN2771712Y (en) | 2006-04-12 |
Family
ID=36705502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520040395 Expired - Fee Related CN2771712Y (en) | 2005-03-25 | 2005-03-25 | Energy-saving control system for central air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2771712Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567529A (en) * | 2014-07-22 | 2015-04-29 | 上海大众祥源动力供应有限公司 | Temperature control system of cooling water of cooling tower |
| CN104566844A (en) * | 2013-10-18 | 2015-04-29 | 宁夏先锋软件有限公司 | Central air conditioner energy-saving unit |
| CN105066376A (en) * | 2015-09-07 | 2015-11-18 | 郑州大学综合设计研究院有限公司 | Artificial cold source intelligent control system of building structure |
| CN104101055B (en) * | 2014-07-22 | 2016-11-16 | 浪潮电子信息产业股份有限公司 | A kind of control method of Water cooled air conditioners |
-
2005
- 2005-03-25 CN CN 200520040395 patent/CN2771712Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566844A (en) * | 2013-10-18 | 2015-04-29 | 宁夏先锋软件有限公司 | Central air conditioner energy-saving unit |
| CN104567529A (en) * | 2014-07-22 | 2015-04-29 | 上海大众祥源动力供应有限公司 | Temperature control system of cooling water of cooling tower |
| CN104101055B (en) * | 2014-07-22 | 2016-11-16 | 浪潮电子信息产业股份有限公司 | A kind of control method of Water cooled air conditioners |
| CN105066376A (en) * | 2015-09-07 | 2015-11-18 | 郑州大学综合设计研究院有限公司 | Artificial cold source intelligent control system of building structure |
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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: 20060412 |