CN202660970U - Closed cooling tower constant temperature control system - Google Patents
Closed cooling tower constant temperature control system Download PDFInfo
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- CN202660970U CN202660970U CN 201220209559 CN201220209559U CN202660970U CN 202660970 U CN202660970 U CN 202660970U CN 201220209559 CN201220209559 CN 201220209559 CN 201220209559 U CN201220209559 U CN 201220209559U CN 202660970 U CN202660970 U CN 202660970U
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- cooling tower
- control system
- water
- temperature control
- fan
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Abstract
The utility model belongs to the technical field of cooling tower constant temperature control, and particularly relates to a closed cooling tower constant temperature control system. The closed cooling tower constant temperature control system mainly comprises a cooling tower, a fan located on the upper portion inside the tower, and a water distribution device located on the bottom of the cooling tower. The closed cooling tower constant temperature control system is characterized in that the fan is a frequency conversion fan, a water outlet of the water distribution device is connected with a temperature sensor, water temperature signals of the outlet of the water distribution device are converted to frequency conversion signals and sent to the frequency conversion fan through a temperature controller and a frequency converter, and real-time control for the air speed is achieved. According to the closed cooling tower constant temperature control system, the rotational speed of the fan can be controlled in frequency conversion mode in real time according to the water temperature, on the condition of little investment, the water temperature can be constant, meanwhile due to the fact that the cooling tower is continuous working equipment, a large amount of energy is saved, and the closed cooling tower constant temperature control system has the advantages of being simple in structure and convenient to maintain.
Description
Technical field
The utility model belongs to cooling tower thermostatic control technology field, is specifically related to a kind of closed cooling tower thermostatic control system.
Background technology
Cooling tower is general main partly to be made of filler (also claiming radiative material), water distribution system, ventilation equipment, air distribution device (as: air intake vent shutter, air ducting, wind trunk), water deflector (or water collection device), water leg (or collecting-tank) etc., 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, to enter in the cooling tower from the Inlet Network place; The high-temperature water molecule that pressure is large in the saturated vapor is to the low Air Flow of pressure, and damp and hot water water spraying system is spilled in the tower.When water droplet and contact with air, on the one hand because the direct heat transfer of air and water, on the other hand owing to have pressure differential between water vapour surface and the air, under the effect of pressure, produce Evaporation Phenomenon, band is up till now 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 by cooling tower.Usually following deficiency can appear:
1. when ambient temperature changes greatly, it is larger that the cooling water temperature that cooling system provides also can respective change;
2. winter particularly, cooling water is excessively cold, may cause refrigerator to shut down;
3. if the cooling tower continuous operation not only reduces the blower fan of cooling tower life-span, also be very large loss to the energy simultaneously.
Summary of the invention
The utility model is for the deficiencies in the prior art, a kind of cooling tower thermostatic control system that can control according to the water temperature Real-time frequency conversion rotation speed of fan is provided, under less investment, not only can make water temperature constant, simultaneously because cooling tower is the equipment of continuous operation, save a large amount of energy, had simultaneously characteristics simple in structure, easy to maintenance.
Concrete technical scheme of the present utility model 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 described blower fan is frequency conversion fan, the delivery port of described water dispensing apparatus is connected with a temperature sensor, its delivery port water temperature signal is converted into frequency variation signal by temperature controller and frequency converter and sends to frequency conversion fan, realizes the real-time control of wind speed.
The utility model blower fan of cooling tower adopts Frequency Converter Control, and temperature controller gathers 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.By the operation principle of cooling tower as can be known, 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 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.Thereby control the change that the frequency converter output frequency is realized rotation speed of fan take this temperature as desired value by temperature controller, control system is just very simple like this.As take the temperature difference as desired value, consider that the cooling tower cooling effect is affected by environment very large, just need also in control system, to add envirment factor that control system will be done very complicatedly like this.
The advantage of the utility model cooling tower thermostatic control system:
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 the utility model closed cooling tower thermostatic control system structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
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, its delivery port water temperature signal is converted into frequency variation signal by temperature controller and frequency converter and sends to frequency conversion fan, realizes the real-time control of wind speed.
When being applied in open cooling tower, the utility model do not need adaptive change, because the fast I affected by environment of water flow velocity is ignored.
Claims (2)
1. closed cooling tower thermostatic control system, 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 described blower fan is frequency conversion fan, the delivery port of described water dispensing apparatus is connected with a temperature sensor, its delivery port water temperature signal is converted into frequency variation signal by 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 described frequency conversion fan adopts Frequency Converter Control, temperature controller gathers the water temperature of outlet pipe, through exporting an analog quantity after the PID computing as the input of frequency converter, be used for controlling the output frequency of frequency converter, thus the intake of control cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220209559 CN202660970U (en) | 2012-05-10 | 2012-05-10 | Closed cooling tower constant temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220209559 CN202660970U (en) | 2012-05-10 | 2012-05-10 | Closed cooling tower constant temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202660970U true CN202660970U (en) | 2013-01-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220209559 Expired - Fee Related CN202660970U (en) | 2012-05-10 | 2012-05-10 | Closed cooling tower constant temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202660970U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706209A (en) * | 2012-05-10 | 2012-10-03 | 浙江上城科技有限公司 | Constant temperature control system for closed cooling tower |
| CN103341512A (en) * | 2013-06-24 | 2013-10-09 | 盛利维尔（中国）新材料技术有限公司 | Lubricating and cooling system used for steel wire drawing |
| CN112857133A (en) * | 2021-01-25 | 2021-05-28 | 山东蓝想环境科技股份有限公司 | Control system for operation of dry-wet combined cooling tower and implementation method thereof |
-
2012
- 2012-05-10 CN CN 201220209559 patent/CN202660970U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706209A (en) * | 2012-05-10 | 2012-10-03 | 浙江上城科技有限公司 | Constant temperature control system for closed cooling tower |
| CN103341512A (en) * | 2013-06-24 | 2013-10-09 | 盛利维尔（中国）新材料技术有限公司 | Lubricating and cooling system used for steel wire drawing |
| CN112857133A (en) * | 2021-01-25 | 2021-05-28 | 山东蓝想环境科技股份有限公司 | Control system for operation of dry-wet combined cooling tower and implementation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130109 Termination date: 20160510 |