CN109373799A - A kind of control method of blower fan of cooling tower control system - Google Patents
A kind of control method of blower fan of cooling tower control system Download PDFInfo
- Publication number
- CN109373799A CN109373799A CN201811565004.9A CN201811565004A CN109373799A CN 109373799 A CN109373799 A CN 109373799A CN 201811565004 A CN201811565004 A CN 201811565004A CN 109373799 A CN109373799 A CN 109373799A
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- Prior art keywords
- frequency converter
- temperature
- cooling tower
- frequency
- blower fan
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feedback Control In General (AREA)
Abstract
The invention discloses a kind of control method of blower fan of cooling tower control system, the following steps are included: A, on the outlet conduit of cooling tower installing temperature transmitter；B, power supply is installed on the power of frequency converter；C, the temperature signal of temperature transmitter is converted on the AI of current signal access frequency converter；D, the simulation flow gain and deviation for adjusting frequency converter, keep the temperature shown on frequency converter consistent with the temperature of in-situ transducer；E, outlet duct temperature is set on the panel of frequency converter, start frequency converter, when outlet temperature is higher than 30 DEG C, the working frequency 50Hz of frequency converter, when nighttime ambient temperature reduces, recirculated water can be with natural heat dissipation, outlet duct temperature is lower than 30 DEG C, frequency converter gradually subtracts frequency operation, when outlet temperature is consistently less than 30 DEG C, frequency converter is run according to the frequency 0Hz of minimum setting, this method in the control loop of frequency converter by being added pid algorithm, it does not need manpower and removes manipulation frequency converter, when frequency converter does not need to come into operation, frequency converter can be run according to low-limit frequency automatically, reduce the consumption of electric energy, it plays an important role in energy-saving and emission-reduction.
Description
Technical field
The present invention relates to blower fan of cooling tower control technology field, specially a kind of controlling party of blower fan of cooling tower control system
Method.
Background technique
Cooling tower is to use water as circulating coolant, heat dissipation is absorbed from a system into atmosphere, to reduce water temperature
Device；It is to carry out cold and hot exchange after contacting using water with air flowing to generate steam that its is cold, and steam volatilization is taken away heat and reached
The principles such as evaporative heat loss, convective heat transfer and radiant heat transfer reduce water temperature to disperse the waste heat generated in industrial or refrigeration air-conditioner
Evaporating radiator, to guarantee the normal operation of system, device is generally tubbiness, and therefore named is cooling tower.
Cooling tower is collection aerodynamics, thermodynamics, fluidics, chemistry, biochemistry, materialogy, quiet, dynamic structure power
It learns, the condensation products that a variety of subjects such as processing technology are integrated.Water quality is the function of multivariable, and cooling is even more multifactor, changeable
The amount process comprehensive with manifold effect.
Blower fan of cooling tower is located at the top of cooling tower, and main function is empty the heat after heat exchange has been carried out in cooling tower
Gas is extracted out from top, and guidance Cryogenic air enters from bottom coohng tower air inlet.Blower fan of cooling tower is the core of entire cooling tower,
There is the normal operation of blower fan of cooling tower, guarantees that Cryogenic air and hot water carry out sufficient heat exchange on filler, guarantee cooling
The cooling effect of tower.In the industrial production, the electric loop of blower fan of cooling tower uses the form of across-the-line starting and varying frequency starting.
Summary of the invention
The purpose of the present invention is to provide a kind of control methods of blower fan of cooling tower control system, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme: it is a kind of reduce electric energy consumption, in energy-saving and emission-reduction
The control method of the blower fan of cooling tower control system to play an important role, the following steps are included: a kind of blower fan of cooling tower control system
Control method, the following steps are included:
A, temperature transmitter is installed on the outlet conduit of cooling tower；
B, power supply is installed on the power of frequency converter；
C, the temperature signal of temperature transmitter is converted on the AI of current signal access frequency converter；
D, the simulation flow gain and deviation for adjusting frequency converter, make the temperature shown on frequency converter and the temperature of in-situ transducer one
It causes.
E, outlet duct temperature is set on the panel of frequency converter, starts frequency converter；
Preferably, temperature transmitter or thermal resistance are installed on the outlet conduit according to step A cooling tower, temperature transmitter
Range is 0 ~ 100 DEG C.
Preferably, the power supply of 24V is installed on the power according to step B frequency converter.
Preferably, the temperature signal according to step C temperature transmitter is converted into 4 ~ 20mA.
Preferably, it is described according on step E frequency converter panel setting outlet pipe outlet pipe temperature be 30 DEG C.
Preferably, the feedback frequency signal range according to step E frequency converter temperature transmitter after frequency converter operation
For 0-50Hz, the frequency converter includes closed loop control mode, operational order mode and binding mode, operational order mode when
It waits, operational order mode setting keyboard is given, and binding mode when is set as VF process reversed polarity, the circuit of the frequency converter
Middle addition pid algorithm.
Preferably, a kind of control method of blower fan of cooling tower control system: it is characterized by: the pid algorithm includes
Step a: setting variable, the subordinating degree function of variable, fuzzy reasoning method and anti fuzzy method method；
Step b: setting inference rule determines the value of e and ec, and exact value kp, ki, kd after obtaining PID output variable establish control
Decision inquiry table processed；
Step c: by VB, writing pid algorithm, and creates frequency converter frequency conversion control.
Compared with prior art, the beneficial effects of the present invention are:
This method does not need manpower and removes manipulation frequency converter, in frequency converter by the way that pid algorithm is added in the control loop of frequency converter
When not needing to come into operation, frequency converter can be run according to low-limit frequency automatically, reduce the consumption of electric energy, there is weight in energy-saving and emission-reduction
It acts on.
Detailed description of the invention
Fig. 1 is cutting machine body construction schematic diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, the present invention provides a kind of technical solution: a kind of control method of blower fan of cooling tower control system, packet
Include following steps:
A, temperature transmitter is installed on the outlet conduit of cooling tower；
B, power supply is installed on the power of frequency converter；
C, the temperature signal of temperature transmitter is converted on the AI of current signal access frequency converter；
D, the simulation flow gain and deviation for adjusting frequency converter, make the temperature shown on frequency converter and the temperature of in-situ transducer one
It causes；
E, outlet duct temperature is set on the panel of frequency converter, starts frequency converter.
Temperature transmitter is installed on the outlet conduit of cooling tower, installed on the outlet conduit of cooling tower temperature transmitter or
Thermal resistance, the range of temperature transmitter are 0 ~ 100 DEG C, and the temperature signal of temperature transmitter is converted into 4 ~ 20mA.
Setting outlet pipe outlet pipe temperature is 30 DEG C on frequency converter panel, and frequency converter temperature transmitter is transported through frequency converter
Feedback frequency signal range after calculation is 0-50Hz, the power supply of 24V is installed on the power of frequency converter, the frequency converter includes closed loop
Control model, operational order mode and binding mode, when operational order mode, operational order mode setting keyboard is given
Calmly, VF process reversed polarity is set as when binding mode.
It is 30 DEG C that outlet duct temperature is arranged on the panel of frequency converter, starts frequency converter, when outlet temperature is higher than 30 DEG C,
The working frequency 50Hz of frequency converter, when nighttime ambient temperature reduces, recirculated water can be lower than 30 with natural heat dissipation, outlet duct temperature
DEG C, frequency converter gradually subtract frequency operation, when outlet temperature is consistently less than 30 DEG C, frequency converter according to minimum setting frequency 0Hz
Operation, frequency converter are run according to low-limit frequency automatically, reduce the consumption of electric energy.
Pid algorithm is added in the circuit of frequency converter, pid algorithm includes
Step a: setting variable, the subordinating degree function of variable, fuzzy reasoning method and anti fuzzy method method；
Step b: setting inference rule determines the value of e and ec, and exact value kp, ki, kd after obtaining PID output variable establish control
Decision inquiry table processed；
Step c: by VB, writing pid algorithm, and creates frequency converter frequency conversion control.
This method does not need manpower and removes manipulation frequency converter, becoming by the way that pid algorithm is added in the control loop of frequency converter
When frequency device does not need to come into operation, frequency converter can be run according to low-limit frequency automatically, the consumption of electric energy be reduced, in energy-saving and emission-reduction
It plays an important role.
The beneficial effects of the present invention are:
This method does not need manpower and removes manipulation frequency converter, in frequency converter by the way that pid algorithm is added in the control loop of frequency converter
When not needing to come into operation, frequency converter can be run according to low-limit frequency automatically, reduce the consumption of electric energy, there is weight in energy-saving and emission-reduction
It acts on.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of control method of blower fan of cooling tower control system, it is characterised in that: the following steps are included:
A, temperature transmitter is installed on the outlet conduit of cooling tower；
B, power supply is installed on the power of frequency converter；
C, the temperature signal of temperature transmitter is converted on the AI of current signal access frequency converter；
D, the simulation flow gain and deviation for adjusting frequency converter, make the temperature shown on frequency converter and the temperature of in-situ transducer one
It causes；
E, outlet duct temperature is set on the panel of frequency converter, starts frequency converter.
2. a kind of control method of blower fan of cooling tower control system according to claim 1: it is characterized by: the basis
Temperature transmitter or thermal resistance are installed, the range of temperature transmitter is 0 ~ 100 DEG C on the outlet conduit of step A cooling tower.
3. a kind of control method of blower fan of cooling tower control system according to claim 1: it is characterized by: the basis
The power supply of 24V is installed on the power of step B frequency converter.
4. a kind of control method of blower fan of cooling tower control system according to claim 1: it is characterized by: the basis
The temperature signal of step C temperature transmitter is converted into 4 ~ 20mA.
5. a kind of control method of blower fan of cooling tower control system according to claim 1: it is characterized by: the basis
Setting outlet pipe outlet pipe temperature is 30 DEG C on step E frequency converter panel.
6. a kind of control method of blower fan of cooling tower control system according to claim 1: it is characterized by: the basis
Feedback frequency signal range of the step E frequency converter temperature transmitter after frequency converter operation is 0-50Hz, and the frequency converter includes
Closed loop control mode, operational order mode and binding mode, when operational order mode, operational order mode setting keyboard
Given, binding mode when, is set as VF process reversed polarity, and pid algorithm is added in the circuit of the frequency converter.
7. a kind of control method of blower fan of cooling tower control system according to claim 6: it is characterized by: the PID
Algorithm includes
Step a: setting variable, the subordinating degree function of variable, fuzzy reasoning method and anti fuzzy method method；
Step b: setting inference rule determines the value of e and ec, and exact value kp, ki, kd after obtaining PID output variable establish control
Decision inquiry table processed；
Step c: by VB, writing pid algorithm, and creates frequency converter frequency conversion control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565004.9A CN109373799A (en) | 2018-12-20 | 2018-12-20 | A kind of control method of blower fan of cooling tower control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565004.9A CN109373799A (en) | 2018-12-20 | 2018-12-20 | A kind of control method of blower fan of cooling tower control system |
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| Publication Number | Publication Date |
|---|---|
| CN109373799A true CN109373799A (en) | 2019-02-22 |
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ID=65370998
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811565004.9A Pending CN109373799A (en) | 2018-12-20 | 2018-12-20 | A kind of control method of blower fan of cooling tower control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12065018B2 (en) | 2020-12-18 | 2024-08-20 | Carrier Corporation | Transport refrigeration systems |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0409989A1 (en) * | 1988-06-20 | 1991-01-30 | Kanto Seiki Co., Ltd. | Method of controlling temperature of machine tool and apparatus for practicing same |
| CN102707617A (en) * | 2012-06-20 | 2012-10-03 | 北京金自能源科技发展有限公司 | Method for realizing fuzzy PID (Proportion Integration Differentiation) ActiveX control |
| CN204902662U (en) * | 2015-08-25 | 2015-12-23 | 林尧林 | Adaptive cooling tower fan controller |
| CN204963107U (en) * | 2015-07-22 | 2016-01-13 | 向君 | Central air conditioning efficiency intelligent control device |
-
2018
- 2018-12-20 CN CN201811565004.9A patent/CN109373799A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0409989A1 (en) * | 1988-06-20 | 1991-01-30 | Kanto Seiki Co., Ltd. | Method of controlling temperature of machine tool and apparatus for practicing same |
| CN102707617A (en) * | 2012-06-20 | 2012-10-03 | 北京金自能源科技发展有限公司 | Method for realizing fuzzy PID (Proportion Integration Differentiation) ActiveX control |
| CN204963107U (en) * | 2015-07-22 | 2016-01-13 | 向君 | Central air conditioning efficiency intelligent control device |
| CN204902662U (en) * | 2015-08-25 | 2015-12-23 | 林尧林 | Adaptive cooling tower fan controller |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12065018B2 (en) | 2020-12-18 | 2024-08-20 | Carrier Corporation | Transport refrigeration systems |
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Application publication date: 20190222 |