CN204730411U - Central air conditioning cooling water system energy-saving controller - Google Patents
Central air conditioning cooling water system energy-saving controller Download PDFInfo
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- CN204730411U CN204730411U CN201520435950.7U CN201520435950U CN204730411U CN 204730411 U CN204730411 U CN 204730411U CN 201520435950 U CN201520435950 U CN 201520435950U CN 204730411 U CN204730411 U CN 204730411U
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- Prior art keywords
- cooling water
- water pump
- frequency converter
- blower fan
- cooling
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Abstract
A kind of central air conditioning cooling water system energy-saving controller, comprise PLC control module, data processor and central controller, and enter (going out) water pressure sensor, enter (going out) water temperature sensor, cooling water pump frequency converter and blower fan of cooling tower frequency converter; Cooling water pump frequency converter is connected with cooling water pump, blower fan of cooling tower frequency converter is connected with blower fan of cooling tower, enters (going out) water pressure sensor, enters (going out) water temperature sensor, cooling water pump frequency converter, blower fan of cooling tower frequency converter be all connected with PLC control module; PLC control module, data processor are all connected with central controller.A kind of central air conditioning cooling water system energy-saving controller that the utility model provides, by the monitoring of each sensor, analysis through PLC control module, data processor and central controller judges, finally controlled to send instruction to frequency converter by PLC control module, thus make cooling water pump and blower fan of cooling tower be in energy-saving run state, reach energy-conservation effect.
Description
Technical field
The utility model relates to central air-conditioning energy technical field, especially relates to a kind of central air conditioning cooling water system energy-saving controller.
Background technology
Along with national economy continues to develop rapidly and the improving constantly of living standards of the people, air-conditioning equipment widely uses in every field, especially the use of central air conditioner system, makes the energy consumption of building significantly increase.According to statistics, in civil buildings, central air conditioner system generally accounts for 40 ~ 50% of total energy consumption, and in air-conditioner water system, water pump accounts for again about 20 ~ 30% of air conditioning energy consumption, and reducing energy consumption potentiality are very large.In central air conditioner system, the capacity of chilled water pump is selected according to building design maximum thermic load, and leaves certain design margin.In general, water pump and blower fan are all full speed running under power frequency state throughout the year, the mode of throttling or backflow is adopted to come adjust flux or air quantity, produce a large amount of throttlings or return loss, and for water pump or blower motor, because it is full speed running under power frequency, therefore cause the waste greatly of energy.Due to the change in the four seasons, rain or shine when sleet and daytime and night, ambient temperature is different, makes the thermic load of central air-conditioning low more than Design cooling load in the overwhelming majority time.That is, therefore the central air-conditioning actual most of the time makes system under the prerequisite meeting technological requirement under operating in low load condition, advanced converter technique is adopted reasonably to regulate the running status of water pump, greatly can reduce energy resource consumption, reduce operating cost, create better benefit.
In conventional practice in the past, in order to reduce the energy consumption of coolant pump and cooling blower in central air conditioning water system, all directly in the water circulation system of central air-conditioning, access frequency conversion system, the change simply utilizing converter technique change motor speed to come adjust flux and pressure is used for replacing Valve controlling flow, this method controls too extensive, air-conditioning system cannot be met under various operating mode simultaneously, keep the most energy-conservation running status.This is mainly because the vari-able flow control of current central air-conditioner cooling water mostly adopts its Inlet and outlet water temperature difference control mode.By setting temperature difference △ T=5 DEG C, regulate cooling water flow with this.When △ T ﹥ 5 DEG C being detected, increasing cooling water pump and run number of units or raise water pump operation frequency, to increase cooling water flow; Otherwise, when △ T ﹤ 5 DEG C being detected, reducing cooling water pump and run number of units or reduce water pump operation frequency, to reduce cooling water flow, thus making △ T remain at 5 DEG C of operations.But because the condensation heat in condenser and the radiating condition in cooling tower all can cause the change of cooling range, so the change of cooling range often correctly can not reflect the change of air conditioner load, thus also just really cannot play Effec-tive Function and energy-conservation object.
Utility model content
In order to avoid the appearance of the problems referred to above, a kind of central air conditioning cooling water system energy-saving controller that the utility model provides, introduce cooling secondary high parameter △ Tv and the cooling water temperature parameter △ Tcm based on system effectiveness the best, thus really reach the requirement of central air conditioning cooling water system Energy Saving Control.
The purpose of this utility model is to provide a kind of central air conditioning cooling water system energy-saving controller, no matter make is the change due to air conditioner load, or outdoor meteorological condition changes the cooling range change caused, can ensure that air-conditioning system is in the most efficient running status, thus reach energy-saving effect.
A kind of central air conditioning cooling water system energy-saving controller that the utility model provides, comprise PLC control module, data processor and central controller, and for monitor cooling water pump discharge pressure discharge pressure sensor, for monitor cooling water pump pressure of return water pressure of return water sensor, for monitor leaving condenser water temperature leaving water temperature sensors, for monitor condenser return water temperature return water temperature sensor, for changing the cooling water pump frequency converter of the running status of cooling water pump and the blower fan of cooling tower frequency converter for changing blower fan of cooling tower running status;
Cooling water pump frequency converter is connected with cooling water pump, blower fan of cooling tower frequency converter is connected with blower fan of cooling tower, and discharge pressure sensor, pressure of return water sensor, leaving water temperature sensors, return water temperature sensor, cooling water pump frequency converter, blower fan of cooling tower frequency converter are all connected with PLC control module; PLC control module, data processor are all connected with central controller.
Further, central air conditioning cooling water system energy-saving controller also comprises humidity sensor, and humidity sensor is connected with PLC control module.
Further, central air conditioning cooling water system energy-saving controller also comprises parameter database, and parameter database is used for acquisition parameter, and parameter database is connected with data processor.
Further, the number of units of blower fan of cooling tower is multiple stage.
Further, the number of units of cooling water pump is multiple stage.
A kind of central air conditioning cooling water system energy-saving controller that the utility model provides, by the monitoring of each sensor, under multiple parameter acting in conjunction, judged by the analysis of PLC control module, data processor and central controller, finally controlled to send instruction to frequency converter by PLC control module, thus not only making cooling water pump and blower fan of cooling tower be in energy-saving run state, whole air-conditioning system is run under maximum power save mode simultaneously, finally reaches energy-conservation effect.
Accompanying drawing explanation
Accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic diagram of the central air conditioning cooling water system energy-saving controller that Fig. 1 provides for the utility model embodiment;
Reference numeral:
1-condenser; 2-cooling water pump; 3-blower fan of cooling tower;
4-discharge pressure sensor; 5-pressure of return water sensor; 6-leaving water temperature sensors;
7-return water temperature sensor; 8-PLC control module; 9-data processor;
10-parameter database; 11-central controller; 12-cooling water pump frequency converter;
13-blower fan of cooling tower frequency converter; 14-cooling tower tower body.
Detailed description of the invention
Be clearly and completely described the technical solution of the utility model below in conjunction with accompanying drawing, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
The schematic diagram of the central air conditioning cooling water system energy-saving controller that Fig. 1 provides for the utility model embodiment, as shown in Figure 1, a kind of central air conditioning cooling water system energy-saving controller that the utility model provides, PLC control module 8, data processor 9 and central controller 11, and for monitoring the discharge pressure sensor 4 of cooling water pump discharge pressure, for monitoring the pressure of return water sensor 5 of cooling water pump pressure of return water, for monitoring the leaving water temperature sensors 6 of leaving condenser water temperature, for monitoring the return water temperature sensor 7 of condenser return water temperature, for changing the cooling water pump frequency converter 12 of the running status of cooling water pump and the blower fan of cooling tower frequency converter 13 for changing blower fan of cooling tower running status,
Cooling water pump frequency converter 12 is connected with cooling water pump 2, blower fan of cooling tower frequency converter 13 is connected with blower fan of cooling tower 3, and discharge pressure sensor 4, pressure of return water sensor 5, leaving water temperature sensors 6, return water temperature sensor 7, cooling water pump frequency converter 12, blower fan of cooling tower frequency converter 13 are all connected with PLC control module 8; PLC control module 8, data processor 9 are all connected with central controller 11.
On the basis of above-described embodiment, further, as shown in Figure 1, central air conditioning cooling water system energy-saving controller also comprises humidity sensor, and humidity sensor is connected with PLC control module 8.
On the basis of above-described embodiment, further, as shown in Figure 1, central air conditioning cooling water system energy-saving controller also comprises parameter database 10, and parameter database 10 is for acquisition parameter, and parameter database 10 is connected with data processor 9.
On the basis of above-described embodiment, further, the number of units of blower fan of cooling tower 3 is multiple stage.
During controller work, as shown in Figure 1, the parameter that central controller 11 imports into according to PLC control module 8 and data processor 9, judges current running situation, and then order PLC control module 8 sends the instruction of concrete controlled cooling model pump variable frequency device 12 and blower fan of cooling tower frequency converter 13.In general, the leaving water temperature T that second parameter △ Tv is cooling tower is cooled
wwith the difference of air ' s wet bulb temperature Tv, i.e. △ Tv=T
w-Tv.Usual setting △ Tv=4 DEG C, regulates the air quantity of blower fan of cooling tower with this.When △ Tv<4 DEG C being detected, then reduce the operation number of units of blower fan of cooling tower 3, to reduce air quantity; When △ Tv>4 DEG C being detected, increasing the operation number of units of blower fan of cooling tower 3, to increase air quantity, thus running at making △ Tv remain at 4 DEG C.The leaving water temperature T of such cooling tower
wdo not fix, when outdoor wet-bulb temperature change, cooling tower leaving water temperature is also in change, and when outdoor wet-bulb temperature is low, the cooling water temperature of handpiece Water Chilling Units is also corresponding lower, and this promotes the refrigerating efficiency of handpiece Water Chilling Units by being beneficial to.
On the basis of above-described embodiment, further, the number of units of cooling water pump 2 is multiple stage.
For the control of cooling water pump, general process is as follows: Inlet and outlet water temperature difference △ T=5 DEG C of setting condenser regulates cooling water flow with this.When △ T<5 DEG C being detected, reducing the operation number of units of cooling water pump 2 or reducing the running frequency of cooling water pump 2, to reduce cooling water flow.But pump capacity is not reduce always, but the traffic protection extreme value G having to set
m, as flow Q<G
mtime, the low-limit frequency in setting is run by water pump, is not changing.When △ T>5 DEG C being detected, increasing the operation number of units of cooling water pump 2 or raising the running frequency of cooling water pump 2, to increase cooling water flow, thus making △ T remain at 5 DEG C of operations.But because the radiating condition of the condensation heat in condenser 1 and cooling tower tower body 14 changes the change that all can cause cooling water temperature, therefore the change of cooling range often can not the load variations of total overall reaction operation of air conditioner, simultaneously condensation temperature too high or too low all will cause unit operation unfavorable, thus in order to make whole air-conditioning system keep high-effect when cooling water pump 2 runs, be incorporated herein optimum temperature T
p.The target of the control that cooling water pump 2 runs, allows cooling water temperature remain on T all the time exactly in the process of water pump operation adjustment
punder.T is detected thus when the parameter in parameter database 10 calculates optimum temperature through data processor 9
ptime, central controller 11 just by data feedback to PLC control module 8, send to cooling water pump frequency converter 12 to regulate the flow of cooling water pump 2 regulating command by PLC control module 8.With this, the control of cooling water pump 2 is by △ T and T
pjointly come, thus guarantee system is run under the most energy-conservation state.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (5)
1. a central air conditioning cooling water system energy-saving controller, it is characterized in that, comprise PLC control module, data processor and central controller, and for monitor cooling water pump discharge pressure discharge pressure sensor, for monitor cooling water pump pressure of return water pressure of return water sensor, for monitor leaving condenser water temperature leaving water temperature sensors, for monitor condenser return water temperature return water temperature sensor, for changing the cooling water pump frequency converter of the running status of cooling water pump and the blower fan of cooling tower frequency converter for changing blower fan of cooling tower running status;
Described cooling water pump frequency converter is connected with cooling water pump, described blower fan of cooling tower frequency converter is connected with blower fan of cooling tower, and described discharge pressure sensor, described pressure of return water sensor, described leaving water temperature sensors, described return water temperature sensor, described cooling water pump frequency converter, described blower fan of cooling tower frequency converter are all connected with described PLC control module; Described PLC control module, described data processor are all connected with described central controller.
2. central air conditioning cooling water system energy-saving controller according to claim 1, is characterized in that, also comprise humidity sensor, and described humidity sensor is connected with described PLC control module.
3. central air conditioning cooling water system energy-saving controller according to claim 2, is characterized in that, also comprise parameter database, and described parameter database is used for acquisition parameter, and described parameter database is connected with described data processor.
4. the central air conditioning cooling water system energy-saving controller according to any one of claims 1 to 3, is characterized in that, the number of units of described blower fan of cooling tower is multiple stage.
5. central air conditioning cooling water system energy-saving controller according to claim 4, is characterized in that, the number of units of described cooling water pump is multiple stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520435950.7U CN204730411U (en) | 2015-06-23 | 2015-06-23 | Central air conditioning cooling water system energy-saving controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520435950.7U CN204730411U (en) | 2015-06-23 | 2015-06-23 | Central air conditioning cooling water system energy-saving controller |
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| CN204730411U true CN204730411U (en) | 2015-10-28 |
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| CN201520435950.7U Expired - Fee Related CN204730411U (en) | 2015-06-23 | 2015-06-23 | Central air conditioning cooling water system energy-saving controller |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440549A (en) * | 2016-05-30 | 2017-02-22 | 靳凯 | Control system for increasing comprehensive energy efficiency ratio of central air conditioning system |
| CN106642857A (en) * | 2017-01-09 | 2017-05-10 | 中国工程物理研究院材料研究所 | System and method for controlling cooling tower fan by using thermodynamic properties of refrigerant |
| CN106996713A (en) * | 2017-04-21 | 2017-08-01 | 南京理工大学 | A kind of constant temperature cooperative control method of many water cooling towers of multi fan |
| CN107388882A (en) * | 2017-08-02 | 2017-11-24 | 南京理工大学 | The multi fan of cooling tower sprays collaboration fuzzy control method more |
| CN107421214A (en) * | 2017-08-15 | 2017-12-01 | 马浩田 | A kind of cooling and energy conserving device |
| CN108645096A (en) * | 2018-06-25 | 2018-10-12 | 长沙经济技术开发区祥原动力供应有限公司 | A kind of circulating cooling system and its control method |
| 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 |
| CN110631212A (en) * | 2019-08-16 | 2019-12-31 | 西安建筑科技大学 | Energy-saving control method for central air-conditioning cooling water system |
| CN110631407A (en) * | 2019-10-14 | 2019-12-31 | 上海诺佛尔生态科技有限公司 | Intelligent cooling tower device, system and working method |
-
2015
- 2015-06-23 CN CN201520435950.7U patent/CN204730411U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440549A (en) * | 2016-05-30 | 2017-02-22 | 靳凯 | Control system for increasing comprehensive energy efficiency ratio of central air conditioning system |
| CN106642857A (en) * | 2017-01-09 | 2017-05-10 | 中国工程物理研究院材料研究所 | System and method for controlling cooling tower fan by using thermodynamic properties of refrigerant |
| CN106996713A (en) * | 2017-04-21 | 2017-08-01 | 南京理工大学 | A kind of constant temperature cooperative control method of many water cooling towers of multi fan |
| CN107388882A (en) * | 2017-08-02 | 2017-11-24 | 南京理工大学 | The multi fan of cooling tower sprays collaboration fuzzy control method more |
| CN107421214A (en) * | 2017-08-15 | 2017-12-01 | 马浩田 | A kind of cooling and energy conserving device |
| CN108645096A (en) * | 2018-06-25 | 2018-10-12 | 长沙经济技术开发区祥原动力供应有限公司 | A kind of circulating cooling system and its control method |
| 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 |
| CN110631212A (en) * | 2019-08-16 | 2019-12-31 | 西安建筑科技大学 | Energy-saving control method for central air-conditioning cooling water system |
| CN110631212B (en) * | 2019-08-16 | 2021-09-24 | 西安建筑科技大学 | Energy-saving control method for central air-conditioning cooling water system |
| CN110631407A (en) * | 2019-10-14 | 2019-12-31 | 上海诺佛尔生态科技有限公司 | Intelligent cooling tower device, system and working method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20200623 |