CN204902662U - Adaptive cooling tower fan controller - Google Patents

Adaptive cooling tower fan controller Download PDF

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Publication number
CN204902662U
CN204902662U CN201520648438.0U CN201520648438U CN204902662U CN 204902662 U CN204902662 U CN 204902662U CN 201520648438 U CN201520648438 U CN 201520648438U CN 204902662 U CN204902662 U CN 204902662U
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China
Prior art keywords
cooling tower
controller
setting value
cooling
frequency
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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
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CN201520648438.0U
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Chinese (zh)
Inventor
林尧林
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Wuhan Gauss union Technology Co., Ltd.
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林尧林
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Priority to CN201520648438.0U priority Critical patent/CN204902662U/en
Application granted granted Critical
Publication of CN204902662U publication Critical patent/CN204902662U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an adaptive cooling tower fan controller, including cooling tower, converter, setting value treater, cooling water temperature sensor and outdoor wet bulb temperature sensor, be provided with the fan on the cooling tower, the converter includes PID controller and frequency -variable controller, frequency -variable controller output and setting value treater control connection, PID controller and frequency -variable controller and fan and setting value treater control connection, the PID controller still with cooling water temperature sensor control connection, setting value treater and outdoor wet bulb temperature sensor control connection. The utility model discloses an increase outdoor wet bulb temperature meter determine the cooling water can be by the concrete temperature of refrigerated to according to the cooling water by refrigerated speed, carry out developments to the cooling water temperature setting value and set for, thereby reach the optimal control to cooling tower fan, reach the purpose of further energy -conservation.

Description

A kind of adaptive blower fan of cooling tower controller
Technical field
The utility model relates to controller applied technical field, particularly the adaptive blower fan of cooling tower controller of one.
Background technology
At present, in central air-conditioning water-cooled unit, cooling tower is used for carrying out cooling down to water warmed-up in unit.Blower fan is the critical component of mechanical-draft cooling tower, and it act as when water drips at cooling tower, and cooling blower makes it to contact more fully with air, transfers heat to surrounding air, water temperature is lowered.Place capacity due to cooling tower is selected according to the condition of maximum heat load in summer, namely consider extreme conditions, but in physical device runs, unit equipment is often when running compared with when low thermal load, so the power consumption of unit is usually unnecessary with waste.Therefore, using the rotating speed of variable frequency regulating speed control cooling blower, at night or under the seasonal climate condition that temperature is lower, by regulating the rotating speed of cooling blower and the unlatching number of units of cooling blower, good energy-saving effect can be reached.
In typical blower fan of cooling tower control system, frequency converter can utilize internal PID function, and can form with temperature is the closed-loop control of control object.The effect of blower fan of cooling tower is that leaving water temperature is dropped to certain value, and the effect of its cooling can be undertaken by the speed adjustment of frequency converter.The difference of controlled volume (leaving water temperature) and setting value is after the PID controller that frequency converter is built-in, and rate of delivery order also controls the output of frequency converter frequency, the final rotating speed regulating blower fan of cooling tower.
In existing control, the setting value of cooling water is relatively-stationary.But the actual cooling effect of cooling tower is determined by the cooling effectiveness of outdoor (wet-bulb temperature) and cooling tower.Therefore there is following shortcoming in existing control:
1) setting value is too low, no matter under frequency conversion or non-frequency situation, and blower fan of cooling tower full speed running overlong time, and do not reach setting value requirement;
2) setting value is too high, does not reach due cooling effect, thus causes refrigeration unit to be run at relatively high temperatures, and operational efficiency is lower.
Above two kinds of situations all cause the waste of the energy.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of adaptive blower fan of cooling tower controller, changes cooling water water outlet temperature setting value in the past and immobilizes or to change but numerical value arranges inaccurate situation; By introducing wet-bulb temperature and time interval parameter, the cooling water temperature reached that can be cooled can be predicted accurately, thus it is too high/too low to avoid coolant water temperature to be set to, and avoids the long-time high-speed cruising of blower fan.Meanwhile, cooling water is cooled to alap temperature, substantially increases the operational efficiency of refrigeration unit, and the basis that can control in traditional frequency conversion continues energy-conservation more than 20%.
The utility model provides following technical scheme:
A kind of adaptive blower fan of cooling tower controller, comprises cooling tower, frequency converter, setting value processor, cooling-water temperature sensor and outdoor wet bulb temperature sensor; Described cooling tower is provided with blower fan; Described frequency converter comprises PID controller and frequency-variable controller; Described blower fan exports with frequency-variable controller and is connected; Described PID controller and frequency-variable controller and blower fan and setting value processor control connection; Described PID controller also with cooling-water temperature sensor control connection; Described setting value processor and outdoor wet bulb temperature sensor control connection.
Further, described cooling tower is provided with water inlet pipe and outlet pipe, and described outlet pipe is connected with outdoor temperature humidity sensor.
Further, described frequency-variable controller output current is 4-20mA current signal.
Further, be duty setting signal and difference signal between described setting value processor and PID controller.
Adopt after technique scheme, the utility model compared to the prior art advantageously:
Compared with prior art, the utility model has following beneficial effect: this adaptive blower fan of cooling tower controller, change prior art and cannot judge that what temperature cooling water can be cooled tower cooler to, therefore often cause the unnecessary high-speed cruising of cooling blower, or refrigeration unit is run under poor efficiency, thus cause the bad situation of energy waste; The utility model judges by increasing outdoor wet-bulb thermometer the actual temp that cooling water can be cooled, and the speed cooled according to cooling water, cooling water temperature setting value is dynamically set, thus reaches the optimum control to blower fan of cooling tower, reach object energy-conservation further.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Fig. 1 is overall structure schematic diagram of the present utility model;
Description of reference numerals: 1-cooling tower; 2-frequency converter; 3-setting value processor; The outdoor wet bulb temperature sensor of 4-; 5-cooling-water temperature sensor; 21-PID controller; 22-frequency-variable controller; A-water inlet pipe; B-outlet pipe.
Specific embodiment
Below in conjunction with Figure of description and embodiment, specific embodiment of the utility model is described in further detail:
With reference to the adaptive blower fan of cooling tower controller of one shown in Fig. 1, comprise cooling tower 1, frequency converter 2, setting value processor 3, outdoor wet bulb temperature sensor 4 and cooling-water temperature sensor 5; Described cooling tower 1 is provided with blower fan 11; Described frequency converter 2 comprises PID controller 21 and frequency-variable controller 22; Described frequency-variable controller 22 exports and setting value processor 3 control connection; Described PID controller 21 and frequency-variable controller 22 and blower fan 11 and setting value processor 3 control connection; Described PID controller 21 also with cooling-water temperature sensor 5 control connection; Described setting value processor 3 and outdoor wet bulb temperature sensor 4 control connection, described cooling tower 1 is provided with water inlet pipe a and outlet pipe b, and described outlet pipe b is connected with outdoor temperature humidity sensor 5, described frequency-variable controller 22 output current is 4-20mA current signal, is duty setting signal and difference signal between described setting value processor 3 and PID controller 21.
Action principle of the present utility model is: when cooling tower is opened, outdoor wet-bulb temperature signal transmission is in setting value processor chips, processor on chip is according to institute's derived signals setting cooling water temperature setting value initial value, the difference of controlled volume (cooling water leaving water temperature) and setting value is after the PID controller that frequency converter is built-in, rate of delivery order also controls the output of frequency converter frequency, regulates the rotating speed of blower fan of cooling tower.After this, often cross a spacer segment (just establishing 10 minutes, adjustable), setting value processor is according to wet-bulb thermometer, and cooling water leaving water temperature and frequency converter institute feedback signal are carried out calculating and reset cooling water water outlet temperature setting value.Control with the optimum water temperature reaching cooling water.
This adaptive blower fan of cooling tower controller, the computational methods of cooling water temperature setting value, the steps include:
Processor on a, chip is that wet-bulb temperature adds 3.5 DEG C (adjustable) according to transmitted wet-bulb temperature setting cooling water temperature setting value initial value;
If b initial value is greater than 18.3 DEG C, then using initial value as the upper limit, using 18.3 DEG C as lower limit; If lower than 18.3 DEG C, then temperature is set as 18.3 DEG C (adjustable according to refrigeration unit situation).
C, every 10 minutes (adjustable), according to wet-bulb thermometer, cooling water leaving water temperature, wet-bulb temperature and frequency converter institute feedback signal are carried out calculating and are reset cooling water temperature setting value, if frequency variation signal reaches 100% and setting value cannot reach, then raised 0.5 DEG C; If frequency variation signal is coolant water temperature continuous decrease lower than lower limit (40%, adjustable according to blower fan type), then setting value is reduced by 0.5 DEG C.
Setting value fluctuates all the time between bound.
The above, it is only preferred embodiment of the present utility model, not any restriction is made to technical scope of the present utility model, therefore every above embodiment is done according to technical spirit of the present utility model any trickle amendment, equivalent variations and modification, all still belong within the scope of the technical solution of the utility model.

Claims (4)

1. an adaptive blower fan of cooling tower controller, comprises cooling tower, frequency converter, setting value processor, cooling-water temperature sensor and outdoor wet bulb temperature sensor; It is characterized in that: described cooling tower is provided with blower fan; Described frequency converter comprises PID controller and frequency-variable controller; Described blower fan exports with frequency-variable controller and is connected; Described PID controller and frequency-variable controller and blower fan and setting value processor control connection; Described PID controller also with cooling-water temperature sensor control connection; Described setting value processor and outdoor wet bulb temperature sensor control connection.
2. the adaptive blower fan of cooling tower controller of one according to claim 1, it is characterized in that: described cooling tower is provided with water inlet pipe and outlet pipe, and described outlet pipe is connected with cooling-water temperature sensor.
3. the adaptive blower fan of cooling tower controller of one according to claim 1, is characterized in that: described frequency-variable controller output current is 4-20mA current signal.
4. the adaptive blower fan of cooling tower controller of one according to claim 1, is characterized in that: be duty setting signal and difference signal between described setting value processor and PID controller.
CN201520648438.0U 2015-08-25 2015-08-25 Adaptive cooling tower fan controller Expired - Fee Related CN204902662U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520648438.0U CN204902662U (en) 2015-08-25 2015-08-25 Adaptive cooling tower fan controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520648438.0U CN204902662U (en) 2015-08-25 2015-08-25 Adaptive cooling tower fan controller

Publications (1)

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CN204902662U true CN204902662U (en) 2015-12-23

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105953602A (en) * 2016-04-25 2016-09-21 珠海格力电器股份有限公司 Energy-saving control method and device used for cooling tower and air-conditioning system
CN106368976A (en) * 2016-11-30 2017-02-01 淮北矿业股份有限公司 Constant-temperature frequency conversion speed regulator for mine cooling 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
CN107883519A (en) * 2017-10-23 2018-04-06 广东美的暖通设备有限公司 Central air-conditioning, the control method of its cooling tower, device and readable storage medium storing program for executing
CN109373799A (en) * 2018-12-20 2019-02-22 江苏道明化学有限公司 A kind of control method of blower fan of cooling tower control system
CN110953837A (en) * 2019-12-12 2020-04-03 中国移动通信集团内蒙古有限公司 Water-cooling cabinet control method, device, equipment and medium
CN111076602A (en) * 2019-12-31 2020-04-28 北京世纪互联宽带数据中心有限公司 Cooling tower fan control method and system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105953602A (en) * 2016-04-25 2016-09-21 珠海格力电器股份有限公司 Energy-saving control method and device used for cooling tower and air-conditioning system
CN106368976A (en) * 2016-11-30 2017-02-01 淮北矿业股份有限公司 Constant-temperature frequency conversion speed regulator for mine cooling 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
CN107883519A (en) * 2017-10-23 2018-04-06 广东美的暖通设备有限公司 Central air-conditioning, the control method of its cooling tower, device and readable storage medium storing program for executing
CN109373799A (en) * 2018-12-20 2019-02-22 江苏道明化学有限公司 A kind of control method of blower fan of cooling tower control system
CN110953837A (en) * 2019-12-12 2020-04-03 中国移动通信集团内蒙古有限公司 Water-cooling cabinet control method, device, equipment and medium
CN111076602A (en) * 2019-12-31 2020-04-28 北京世纪互联宽带数据中心有限公司 Cooling tower fan control method and system

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20171103

Address after: 430000 Wuhan Province, East Lake New Technology Development Zone, high tech Avenue, No. 999, No.

Patentee after: Wuhan Gauss union Technology Co., Ltd.

Address before: 430074 Wuhan Province, East Lake New Technology Development Zone, high tech Avenue, No. 999, No.

Patentee before: Lin Yaolin

Effective date of registration: 20171103

Address after: 430000 Wuhan Province, East Lake New Technology Development Zone, high tech Avenue, No. 999, No.

Patentee after: Wuhan Gauss union Technology Co., Ltd.

Address before: 430074 Wuhan Province, East Lake New Technology Development Zone, high tech Avenue, No. 999, No.

Patentee before: Lin Yaolin

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: 20151223

Termination date: 20200825