CN204478399U - Centrifugal refrigerating machines exports the energy-efficient regulating system of energy - Google Patents
Centrifugal refrigerating machines exports the energy-efficient regulating system of energy Download PDFInfo
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- CN204478399U CN204478399U CN201520108585.9U CN201520108585U CN204478399U CN 204478399 U CN204478399 U CN 204478399U CN 201520108585 U CN201520108585 U CN 201520108585U CN 204478399 U CN204478399 U CN 204478399U
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000000498 cooling water Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000010792 warming Methods 0.000 description 1
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Abstract
The utility model relates to the energy-efficient regulating system that a kind of centrifugal refrigerating machines exports energy, centrifugal refrigerating machines is provided with cooling tower and condenser, cooling loop is formed by water inlet pipe and outlet pipe between cooling tower and condenser, this regulating system comprises variable water pump, frequency converter, first temperature sensor, second temperature sensor and temperature controller, variable water pump and the first temperature sensor are all located on water inlet pipe, second temperature sensor is located on outlet pipe, the input of temperature controller connects the output of the first temperature sensor and the second temperature sensor respectively, the input of frequency converter connects the output of temperature controller, the control end of the output link variable water pump of frequency converter.Compared with prior art, the utility model controls frequency converter according to the temperature difference, and then changes the flow in chilled water circuit, has good energy-saving effect, and enough losses significantly reducing cooling water, rotating speed reduces the service life can improving water pump and motor simultaneously.
Description
Technical field
The utility model relates to Energy Saving Control field, especially relates to the energy-efficient regulating system that a kind of centrifugal refrigerating machines exports energy.
Background technology
The increasing of the environmental pressure brought along with anxiety and the global warming of world energy sources resource, economize energy, protection of the environment has become the very important significant problem in countries in the world.The energy consumption of central air conditioner system occupies the over half of building energy consumption, and wherein the energy consumption of the equipment such as cooling water pump occupies greatly.
The working condition of centrifugal refrigerating machines not only depends on the characteristic of centrifugal compressor, and relevant with the working condition of condenser, evaporimeter, only have and keep the good coupling of condenser, evaporimeter and centrifugal compressor that handpiece Water Chilling Units just can be made to run well.
When the flow by compressor is equal with by the flow of condenser, evaporimeter, when the pressure head (difference of exhaust port pressure and air entry pressure) that compressor produces equals the resistance of refrigeration plant, whole refrigeration system could keep working in the state of the equilibrium.Like this, the balance condition of handpiece Water Chilling Units should be the intersection point of compressor characteristic curve and condenser characteristic curve.
As shown in Figure 2, cooling water flow was all provided by quantitative water pump in the past, and when load variations, the Inlet and outlet water temperature difference of cooling water often alters a great deal, and occurred little temperature difference phenomenon, the defect of Here it is quantitative water pump.
Fig. 1 reflects, when cold in-water temperature is constant, and the characteristic curve of condenser, evaporimeter, compressor and efficiency curve.In figure, the intersection points B of compressor characteristic curve I is the stable operating point of compressor.When condenser cooling water inflow changes, the characteristic curve of condenser will change, and at this moment intersection point A also changes thereupon, thus change the refrigerating capacity of compressor, namely change the output energy of centrifugal refrigerating machines.Therefore, in order to solve the defect of quantitative water pump, the utility model proposes the energy-efficient regulating system that a kind of centrifugal refrigerating machines exports energy.
Utility model content
The purpose of this utility model is exactly provide a kind of centrifugal refrigerating machines to export the energy-efficient regulating system of energy to overcome defect that above-mentioned prior art exists, frequency converter is controlled according to the temperature difference, and then the flow in change chilled water circuit, there is good energy-saving effect, enough losses significantly reducing cooling water, rotating speed reduces the service life can improving water pump and motor simultaneously.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of centrifugal refrigerating machines exports the energy-efficient regulating system of energy, described centrifugal refrigerating machines is provided with cooling tower and condenser, cooling loop is formed by water inlet pipe and outlet pipe between described cooling tower and condenser, this regulating system comprises variable water pump, frequency converter, first temperature sensor, second temperature sensor and temperature controller, described variable water pump and the first temperature sensor are all located on water inlet pipe, described second temperature sensor is located on outlet pipe, the input of described temperature controller connects the output of the first temperature sensor and the second temperature sensor respectively, the input of described frequency converter connects the output of temperature controller, the control end of the output link variable water pump of frequency converter.
Described first temperature sensor and the second temperature sensor are PT1000 temperature sensor.
Described centrifugal refrigerating machines is multiple, the quantity of centrifugal refrigerating machines is consistent with the quantity of variable water pump, frequency converter, the first temperature sensor, the second temperature sensor, and one_to_one corresponding is arranged, described temperature controller is one, and connects multiple frequency converter, multiple first temperature sensor and multiple second temperature sensor respectively.
Described frequency converter is the frequency converter of Mitsubishi FR-F740-S132K-CHT series.
Described temperature controller is PID controller.
Compared with prior art, the utility model has the following advantages:
1) energy consumption is reduced, and can realize temperature automatically controlled: by the temperature signal from PT1000 temperature sensor to set the frequency of frequency converter, water inlet pipe and water outlet pipe temperature signal is made to get back to setting value, reach temperature automatically controlled object, simultaneously because variable pump power is relevant with rotating speed, so can obtain good energy-saving effect.
2) loss of cooling water can significantly be reduced: the change of load causes the change of the condenser two ends temperature difference, temperature controller realizes exporting energy to centrifugal refrigerating machines by the flow (i.e. cooling water flow) changed on cooling loop and regulates, and can reduce the input cost of process quality of cooling water.
3) reduce rotating speed: the rotating speed comparing constant displacement pump is constant, in order to reduce the flow on cooling loop, the rotating speed of this practical information controllable variable water pump declines, and the reduction of rotating speed can improve the service life of water pump and motor.
Accompanying drawing explanation
Fig. 1 is the characteristic curve of condenser cooling water inflow varying type centrifugal refrigerating machines;
Fig. 2 is the structural representation of existing condenser cooling water flow;
Fig. 3 is the structural representation controlling condenser cooling water flow in the utility model.
In figure: 1, cooling tower, 2, condenser, 3, quantitatively water pump, 4, frequency converter, the 5, first temperature sensor, the 6, second temperature sensor, 7, temperature controller, 8, variable water pump.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
The present embodiment is automobile three factory No. 1 station, if with the rotating speed of frequency converter 4 control pump, so correspond to load flow, the amount of power that variable water pump 8 consumes declines in 3 power ratios of rotating speed, therefore controlling water pump by changing frequency converter 4 into, annual electrisity consumption can be made obviously to decline.
As shown in Figure 3, a kind of centrifugal refrigerating machines exports the energy-efficient regulating system of energy, centrifugal refrigerating machines is provided with cooling tower 1 and condenser 2, cooling loop is formed by water inlet pipe and outlet pipe between cooling tower 1 and condenser 2, this regulating system comprises variable water pump 8, frequency converter 4, first temperature sensor 5, second temperature sensor 6 and temperature controller 7, variable water pump 8 and the first temperature sensor 5 are all located on water inlet pipe, second temperature sensor 6 is located on outlet pipe, the input of temperature controller 7 connects the output of the first temperature sensor 5 and the second temperature sensor 6 respectively, the input of frequency converter 4 connects the output of temperature controller 7, the control end of the output link variable water pump 8 of frequency converter 4.
Wherein, frequency converter 4 is the frequency converter 4 of Mitsubishi FR-F740-S132K-CHT series.Temperature controller 7 is PID controller.Temperature controller 7 adopts the monitoring software INSIGHT of Siemens Building Auto-control to control.First temperature sensor 5 and the second temperature sensor 6 are PT1000 temperature sensor.
Centrifugal refrigerating machines is multiple, the quantity of centrifugal refrigerating machines is consistent with the quantity of variable water pump 8, frequency converter 4, first temperature sensor 5, second temperature sensor 6, and one_to_one corresponding is arranged, wherein, temperature controller 7 is one, and connects multiple frequency converter 4, multiple first temperature sensor 5 and multiple second temperature sensor 6 respectively.Originally be in embodiment, configuration aspects, being exactly the corresponding cooling tower 1 of a variable water pump 8, is relation corresponding one to one.But there are 8 units in automobile three factory No. 1 station, 1 frequency converter 4 controls 1 water pump, then totally 8 frequency converters 4, corresponding first temperature sensor 5 and the second temperature sensor 6 are also respectively 8, and their are unified is inputted by band multichannel, most central controlled temperature controller 7 exported controls.
Operation principle:
The temperature of Real-time Collection condenser 2 water inlet pipe and outlet pipe inner cooling water is divided into T
1and T
2, obtain water inlet pipe and water outlet pipe temperature signal T, T=T
1+ T
2; The flow on cooling loop is regulated according to water inlet pipe and water outlet pipe temperature signal T, when T is less than temperature difference setting value, the rotating speed of control variables water pump 8 declines, reduce the flow on cooling loop, when T is greater than setting value, the rotating speed of control variables water pump 8 rises, and increases flow on cooling loop, make water inlet pipe and water outlet pipe temperature signal get back to setting value, realize that energy is exported to centrifugal refrigerating machines by the flow changed on cooling loop and regulate.
Compare the use of quantitative water pump 3 in Fig. 2, adopt the rotating speed of frequency converter 4 control variables water pump 8, realize the adjustment that handpiece Water Chilling Units exports energy.If load change greatly, the variable water pump 8 that a band frequency converter 4 is also set in water outlet pipe part can be considered, and connecting temperature controller 7, its control mode, with the control mode of the variable water pump 8 at water inlet pipe place, regulates handpiece Water Chilling Units to export energy for changing according to load.
Claims (5)
1. the energy-efficient regulating system of a centrifugal refrigerating machines output energy, described centrifugal refrigerating machines is provided with cooling tower and condenser, cooling loop is formed by water inlet pipe and outlet pipe between described cooling tower and condenser, it is characterized in that, this regulating system comprises variable water pump, frequency converter, first temperature sensor, second temperature sensor and temperature controller, described variable water pump and the first temperature sensor are all located on water inlet pipe, described second temperature sensor is located on outlet pipe, the input of described temperature controller connects the output of the first temperature sensor and the second temperature sensor respectively, the input of described frequency converter connects the output of temperature controller, the control end of the output link variable water pump of frequency converter.
2. centrifugal refrigerating machines according to claim 1 exports the energy-efficient regulating system of energy, and it is characterized in that, described first temperature sensor and the second temperature sensor are PT1000 temperature sensor.
3. centrifugal refrigerating machines according to claim 1 exports the energy-efficient regulating system of energy, it is characterized in that, described centrifugal refrigerating machines is multiple, the quantity of centrifugal refrigerating machines is consistent with the quantity of variable water pump, frequency converter, the first temperature sensor, the second temperature sensor, and one_to_one corresponding is arranged, described temperature controller is one, and connects multiple frequency converter, multiple first temperature sensor and multiple second temperature sensor respectively.
4. centrifugal refrigerating machines according to claim 1 exports the energy-efficient regulating system of energy, and it is characterized in that, described frequency converter is the frequency converter of Mitsubishi FR-F740-S132K-CHT series.
5. centrifugal refrigerating machines according to claim 1 exports the energy-efficient regulating system of energy, and it is characterized in that, described temperature controller is PID controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520108585.9U CN204478399U (en) | 2015-02-13 | 2015-02-13 | Centrifugal refrigerating machines exports the energy-efficient regulating system of energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520108585.9U CN204478399U (en) | 2015-02-13 | 2015-02-13 | Centrifugal refrigerating machines exports the energy-efficient regulating system of energy |
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| Publication Number | Publication Date |
|---|---|
| CN204478399U true CN204478399U (en) | 2015-07-15 |
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| CN201520108585.9U Expired - Fee Related CN204478399U (en) | 2015-02-13 | 2015-02-13 | Centrifugal refrigerating machines exports the energy-efficient regulating system of energy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972784A (en) * | 2016-06-30 | 2016-09-28 | 上海大众祥源动力供应有限公司 | Temperature regulation system for cooling water for centrifugal unit and method |
| CN106482281A (en) * | 2015-08-28 | 2017-03-08 | 青岛海尔空调电子有限公司 | A kind of control device for handpiece Water Chilling Units, control method and handpiece Water Chilling Units |
-
2015
- 2015-02-13 CN CN201520108585.9U patent/CN204478399U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482281A (en) * | 2015-08-28 | 2017-03-08 | 青岛海尔空调电子有限公司 | A kind of control device for handpiece Water Chilling Units, control method and handpiece Water Chilling Units |
| CN105972784A (en) * | 2016-06-30 | 2016-09-28 | 上海大众祥源动力供应有限公司 | Temperature regulation system for cooling water for centrifugal unit and method |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |