CN102706209A - Constant temperature control system for closed cooling tower - Google Patents
Constant temperature control system for closed cooling tower Download PDFInfo
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- CN102706209A CN102706209A CN2012101453546A CN201210145354A CN102706209A CN 102706209 A CN102706209 A CN 102706209A CN 2012101453546 A CN2012101453546 A CN 2012101453546A CN 201210145354 A CN201210145354 A CN 201210145354A CN 102706209 A CN102706209 A CN 102706209A
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- cooling tower
- water
- control system
- frequency conversion
- constant temperature
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Abstract
The invention belongs to the technical field of constant temperature control of cooling towers, and particularly relates to a constant temperature control system for a closed cooling tower. The constant temperature control system for the closed cooling tower comprises a cooling tower, a blower in the upper part of the tower and a water distribution device at the bottom of the cooling tower, and is characterized in that the blower is a frequency conversion blower, a water outlet of the water distribution device is connected with a temperature sensor, a water temperature signal of the water outlet is converted into a frequency conversion signal through a temperature controller and a frequency converter and sent to the frequency conversion blower to control the wind speed in real time. The constant temperature control system for the closed cooling tower provided by the invention can control the rotating speed of the blower in real time in a frequency conversion manner according to the water temperature, and not only maintains the water temperature constant under less investment, but also saves a lot of energy sources because the cooling tower is a continuous working device. The constant temperature control system for the closed cooling tower provided by the invention has the advantages of simple structure and convenience in maintenance.
Description
Technical field
The invention belongs to cooling tower thermostatic control technical field, be specifically related to a kind of closed cooling tower thermostatic control system.
Background technology
Cooling tower is general main to be made up of parts such as filler (also claiming radiative material), water distribution system, ventilation equipment, air distribution device (as: air intake vent shutter, air ducting, wind trunk), dash device (or water collection device), water legs (or collecting-tank), and the various combination of said structure can be configured to the cooling tower of different types.
The operation principle of cooling tower is after dry air is twitched through blower fan, in the Inlet Network place gets into cooling tower; The high-temperature water molecule that pressure is big in the saturated vapor flows to the low air of pressure, and damp and hot water water spraying system is spilled in the tower.When water droplet contacts with air; On the one hand because the direct heat transfer of air and water; Owing to have pressure differential between water vapour surface and the air, under the effect of pressure, produce Evaporation Phenomenon on the other hand, take at present for walking evaporation latent heat; It is evaporation heat transfer that heat in the water is taken away, thereby reaches the purpose of cooling.
In factory, cooling water is provided for production equipment or refrigerator, all need cooling tower.Therefore, the application of cooling tower is very extensive.But in practice, equipment needs the cooling water of temperature constant, but generally is difficult to reach requirement through cooling tower.Usually following deficiency can appear:
1. when ambient temperature changes greatly, it is bigger that the cooling water temperature that cooling system provides also can respective change;
2. winter particularly, cooling water is cold excessively, may cause refrigerator to shut down;
3. if cooling tower turns round continuously, not only reduce the blower fan of cooling tower life-span, also be very big loss to the energy simultaneously.
Summary of the invention
The present invention is directed to the deficiency of prior art; Providing a kind of can under less investment, not only can make water temperature constant according to the cooling tower thermostatic control system of the real-time VFC rotation speed of fan of water temperature; Simultaneously because cooling tower is the equipment of continuous operation; Save a large amount of energy, had characteristics simple in structure, easy to maintenance simultaneously.
Concrete technical scheme of the present invention is:
A kind of closed cooling tower thermostatic control system; Mainly comprise cooling tower, be positioned at the blower fan of tower internal upper part and be in the water dispensing apparatus of cooling tower bottom; It is characterized in that said blower fan is a frequency conversion fan; The delivery port of said water dispensing apparatus is connected with a temperature sensor, and its delivery port water temperature signal is converted into frequency variation signal through temperature controller and frequency converter and sends to frequency conversion fan, realizes the real-time control of wind speed.
Blower fan of cooling tower of the present invention adopts Frequency Converter Control, and temperature controller is gathered the water temperature of outlet pipe, as the input of frequency converter, is used for controlling the output frequency of frequency converter through analog quantity of output after the PID computing, thus the intake of control cooling tower.Operation principle by cooling tower can know that along with the electrodeless change of frequency conversion fan rotating speed, the pressure differential between water vapour and the air also changes thereupon, and the heat of taking away from steam also changes thereupon, has so just realized the variation of water temperature.The small variation of water temperature will cause the change of frequency conversion fan rotating speed, thereby realizes the constant of water temperature.On this principle basis, can expand to the application of a plurality of encloseds or open type cooling tower.
The leaving water temperature of cooling tower is exactly the inflow temperature of our equipment, and our purpose is the control inflow temperature.With this temperature is thereby that desired value is controlled the change that the frequency converter output frequency is realized rotation speed of fan through temperature controller, and it is just very simple to control system like this.As being desired value with the temperature difference, consider that the cooling tower cooling effect is affected by environment very big, just need also in the control system, to add envirment factor that the system that controls like this will do very complicatedly.
The advantage of cooling tower thermostatic control system of the present invention:
1. the cooling water effluent temperature constancy can be controlled at water temperature in 0.1 degree centigrade of scope in the practice;
2. in the time of environmental change, the fan of cooling tower changes rotating speed according to variations in temperature, can energy savings;
3. less investment only increases frequency converter, temperature sensor and temperature controller.Simultaneously, automatic control system is fairly simple, and debugging is got up very easy.
Description of drawings
Fig. 1 is a closed cooling tower thermostatic control system structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further description.
Closed cooling tower thermostatic control system as shown in Figure 1; Mainly comprise cooling tower, be positioned at the frequency conversion fan of tower internal upper part and be in the water dispensing apparatus of cooling tower bottom; This water dispensing apparatus comprises water inlet pipe and outlet pipe; Wherein the delivery port of outlet pipe is connected with a temperature sensor, and its delivery port water temperature signal is converted into frequency variation signal through temperature controller and frequency converter and sends to frequency conversion fan, realizes the real-time control of wind speed.
When being applied in the open type cooling tower, the present invention do not need adaptive change, because of the fast I affected by environment of water flow velocity is ignored.
Claims (2)
1. closed cooling tower thermostatic control system; Mainly comprise cooling tower, be positioned at the blower fan of tower internal upper part and be in the water dispensing apparatus of cooling tower bottom; It is characterized in that said blower fan is a frequency conversion fan; The delivery port of said water dispensing apparatus is connected with a temperature sensor, and its delivery port water temperature signal is converted into frequency variation signal through temperature controller and frequency converter and sends to frequency conversion fan, realizes the real-time control of wind speed.
2. closed cooling tower thermostatic control system according to claim 1; It is characterized in that said frequency conversion fan adopts Frequency Converter Control; Temperature controller is gathered the water temperature of outlet pipe; As the input of frequency converter, be used for controlling the output frequency of frequency converter through analog quantity of output after the PID computing, thus the intake of control cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101453546A CN102706209A (en) | 2012-05-10 | 2012-05-10 | Constant temperature control system for closed cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101453546A CN102706209A (en) | 2012-05-10 | 2012-05-10 | Constant temperature control system for closed cooling tower |
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| Publication Number | Publication Date |
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| CN102706209A true CN102706209A (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012101453546A Pending CN102706209A (en) | 2012-05-10 | 2012-05-10 | Constant temperature control system for closed cooling tower |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165546A (en) * | 2014-08-14 | 2014-11-26 | 清华大学 | Cooling tower water and energy saving remote monitoring system and monitoring method thereof |
| CN104457394A (en) * | 2013-09-23 | 2015-03-25 | 山东能源机械集团大族再制造有限公司 | Temperature-control water cooling system |
| 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 |
| CN105987617A (en) * | 2015-02-05 | 2016-10-05 | 东元电机股份有限公司 | Energy-saving frequency converting control system of cooling tower |
| CN109186275A (en) * | 2018-10-09 | 2019-01-11 | 佛山市海天（江苏）调味食品有限公司 | Tandem constant-temperature cooling system |
| CN113375384A (en) * | 2021-07-17 | 2021-09-10 | 南京拓展科技有限公司 | Ultrahigh-precision process cooling water system and constant temperature control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09229588A (en) * | 1996-02-26 | 1997-09-05 | Tokyo Gas Co Ltd | Method and device for supplying cooling water |
| CN2485618Y (en) * | 2000-12-18 | 2002-04-10 | 浙江联丰股份有限公司 | Mechanical ventilation cooling tower |
| CN201653252U (en) * | 2010-05-06 | 2010-11-24 | 宁波思创水冷机械有限公司 | Energy-saving type closed type cooling tower |
| CN202660970U (en) * | 2012-05-10 | 2013-01-09 | 浙江上城科技有限公司 | Closed cooling tower constant temperature control system |
-
2012
- 2012-05-10 CN CN2012101453546A patent/CN102706209A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09229588A (en) * | 1996-02-26 | 1997-09-05 | Tokyo Gas Co Ltd | Method and device for supplying cooling water |
| CN2485618Y (en) * | 2000-12-18 | 2002-04-10 | 浙江联丰股份有限公司 | Mechanical ventilation cooling tower |
| CN201653252U (en) * | 2010-05-06 | 2010-11-24 | 宁波思创水冷机械有限公司 | Energy-saving type closed type cooling tower |
| CN202660970U (en) * | 2012-05-10 | 2013-01-09 | 浙江上城科技有限公司 | Closed cooling tower constant temperature control system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457394A (en) * | 2013-09-23 | 2015-03-25 | 山东能源机械集团大族再制造有限公司 | Temperature-control water cooling system |
| 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 |
| CN104165546A (en) * | 2014-08-14 | 2014-11-26 | 清华大学 | Cooling tower water and energy saving remote monitoring system and monitoring method thereof |
| CN104165546B (en) * | 2014-08-14 | 2016-05-18 | 清华大学 | A kind of cooling tower save water and energy long distance control system and method for supervising thereof |
| CN105987617A (en) * | 2015-02-05 | 2016-10-05 | 东元电机股份有限公司 | Energy-saving frequency converting control system of cooling tower |
| CN109186275A (en) * | 2018-10-09 | 2019-01-11 | 佛山市海天（江苏）调味食品有限公司 | Tandem constant-temperature cooling system |
| CN113375384A (en) * | 2021-07-17 | 2021-09-10 | 南京拓展科技有限公司 | Ultrahigh-precision process cooling water system and constant temperature control method thereof |
| CN113375384B (en) * | 2021-07-17 | 2022-08-30 | 南京拓展科技有限公司 | Ultrahigh-precision process cooling water system and constant temperature control method thereof |
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Application publication date: 20121003 |