CN203657143U - Temperature adjusting device - Google Patents

Temperature adjusting device Download PDF

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Publication number
CN203657143U
CN203657143U CN201320712403.XU CN201320712403U CN203657143U CN 203657143 U CN203657143 U CN 203657143U CN 201320712403 U CN201320712403 U CN 201320712403U CN 203657143 U CN203657143 U CN 203657143U
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CN
China
Prior art keywords
water
temperature
cooling water
loop
temperature sensor
Prior art date
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
Application number
CN201320712403.XU
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Chinese (zh)
Inventor
姚中
张静
朱文君
董彩虹
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Kobe Transmission Technology (shanghai) Co Ltd
Original Assignee
Kobe Transmission Technology (shanghai) Co Ltd
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Priority to CN201320712403.XU priority Critical patent/CN203657143U/en
Application granted granted Critical
Publication of CN203657143U publication Critical patent/CN203657143U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a temperature adjusting device used for a cooling water circulation system. The cooling water circulation system comprises a water outlet loop, a return water loop and a cooling water pump, wherein the temperature adjusting device comprises a water outlet temperature sensor, a return water temperature sensor, a subtraction circuit and a PID (Proportion Integration Differentiation) controller, wherein the subtraction circuit takes the cooling water temperature of the water outlet loop measured by the water outlet temperature sensor as an input signal of a subtrahend and the cooling water temperature of the return water loop measured by the return water temperature sensor as the input signal of a minuend, and the PID controller outputs a control signal to the cooling water pump according to an output signal of the subtraction circuit and a temperature set value. The temperature adjusting device disclosed by the utility model can greatly save energy consumption of the cooling water circulation system, and is low in cost and capable of operating independently by using a servo driver of the temperature adjusting device instead of an upper computer.

Description

Temperature-adjusting device
Technical field
The utility model relates to a kind of temperature-adjusting device.
Background technology
In central air conditioner system, often can use cooling water recirculation system, the capacity of cooling water pump is selected according to building design maximum thermic load, and leaves certain design margin.Not using in the cooling water recirculation system of speed governing, cooling water pump is full speed running under power frequency state throughout the year.But outside air temperature can change because of season, weather or the difference of time, make the thermic load of central air conditioner system reality low more than the thermic load of design in the overwhelming majority time, while that is to say central air conditioner system actual motion, most of the time operates under low load condition, and the oepration at full load time is no more than 10-20 hour every year.Can cause so a large amount of energy dissipations.
Utility model content
The technical problems to be solved in the utility model is in order to overcome the larger defect of cooling water recirculation system waste energy in prior art, to provide a kind of and can significantly save the energy consumption of cooling water recirculation system and temperature-adjusting device with low cost.
The utility model is to solve above-mentioned technical problem by following technical proposals: a kind of temperature-adjusting device, for cooling water recirculation system, described cooling water recirculation system comprises that one goes out water loop, one water return loop and a cooling water pump, its feature is, described temperature-adjusting device comprises a leaving water temperature sensor, one return water temperature sensor, one subtraction circuit and a PID(PID) controller, described subtraction circuit is made the input signal of subtrahend to go out the cooling water water temperature of water loop described in leaving water temperature sensor measurement, make the input signal of minuend with the cooling water water temperature of the described water return loop of return water temperature sensor measurement, described PID controller outputs control signals to described cooling water pump according to the output signal of described subtraction circuit and a desired temperature.
Regulate cooling water circulation flow by changing motor speed, the variation of cooling water circulation flow and thermic load is adapted and can obtain obvious energy-saving effect.The utility model utilizes PID controller automatically to control the running frequency of cooling water pump, obtain out the cooling water water temperature of water loop and water return loop by leaving water temperature sensor and return water temperature sensor, then obtain out the actual temperature difference between the cooling water water temperature of water loop and water return loop by subtraction circuit.Utilize existing PID adjustment method, the input using the actual temperature difference as PID controller.Because the input of PID controller uses the cooling water water temperature that value of feedback is water return loop, the utility model is that closed loop is controlled automatically, the rotating speed that PID controller can be controlled described cooling water pump makes the described actual temperature difference approach described desired temperature, if the actual temperature difference is higher, the automatic control of PID meeting cooling water pump revs up and improves cooling water circulation flow; If the lower namely actual temperature difference of the actual temperature difference approaches desired temperature, PID can reach energy-conservation effect by automatic control cooling water pump reduction rotating speed.
Wherein, described subtraction circuit with described go out the cooling water water temperature of water loop make the input signal of subtrahend, make the input signal of minuend with the cooling water water temperature of described water return loop, be to subtract by the cooling water water temperature of water return loop the cooling water water temperature that water loop to obtain by the actual temperature difference of subtraction circuit output described in sort signal transmission means.
Preferably, described leaving water temperature sensor is connected with an input of described subtraction circuit by a temperature transmitter, and described return water temperature sensor is connected with another input of described subtraction circuit by another temperature transmitter.
Utilize temperature transmitter can make the input signal standard more of the cooling water water temperature conversion of temperature sensor acquisition, thereby make temperature-adjusting device of the present utility model control more accurately the rotating speed of cooling water pump according to the cooling water water temperature that goes out water loop and water return loop, energy-saving effect is also more desirable.
Positive progressive effect of the present utility model is: the utility model can significantly be saved the energy consumption of cooling water recirculation system, and temperature-adjusting device of the present utility model is with low cost, utilize described thermostatic servo-driver not need host computer, can work alone.
Accompanying drawing explanation
Fig. 1 is the structural representation of the thermostatic embodiment of the utility model.
Fig. 2 is the control principle drawing of the PID controller of the thermostatic embodiment of the utility model.
The specific embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
Embodiment
In the present embodiment, referring to Fig. 1, a kind of temperature-adjusting device, for cooling water recirculation system, described cooling water recirculation system comprises that one goes out water loop, a water return loop and a cooling water pump 17, and described temperature-adjusting device comprises a leaving water temperature sensor 11, a return water temperature sensor 12, a subtraction circuit 15 and a PID controller 16.
Described leaving water temperature sensor 11 is connected with an input of described subtraction circuit 15 by a temperature transmitter 13, and described return water temperature sensor 12 is connected with another input of described subtraction circuit 15 by another temperature transmitter 14.
Described subtraction circuit 15 measure with leaving water temperature sensor 11 described in go out water loop cooling water water temperature make the input signal of subtrahend, the cooling water water temperature of the described water return loop measured with return water temperature sensor 12 makes the input signal of minuend, the output signal of subtraction circuit 15 is the actual temperature difference that the cooling water water temperature of water loop and water return loop.
Described PID controller 16 outputs control signals to described cooling water pump 17 according to the output signal of described subtraction circuit 15 and a desired temperature.Here described desired temperature is 5 ℃.
Referring to Fig. 2, the temperature-adjusting device of the present embodiment utilizes the PID controller of prior art, PID controller output control signal u and PID controller input e, PID controller input e is the actual temperature difference and the error of 5 ℃ of desired temperatures, s is that the Lars of time variable t converts.
Pass between output control signal u and PID controller input e ties up to available formula in time domain and represents as follows:
u ( t ) = K p e ( t ) + K I ∫ 0 t e ( t ) dt + K d de ( t ) dt .
T in above formula is time variable, by regulating K p, K i, K dvalue can make PID controller control better cooling water pump.The speed that error reduces depends on Proportional coefficient K p, K pit is faster that larger error reduces, but be easy to cause vibration, especially in the situation that sluggish link is larger; K preduce, the possibility that vibration occurs reduces but the actual temperature difference approaches the speed of 5 ℃ of desired temperatures slack-off.In integration control, the output of PID controller and input error signal be integrated into proportional relation.Integral coefficient K ibe used for regulating the power to error signal integration, K ifaster to error responses more greatly, but overshoot can be caused.In differential control, the output of PID controller and the differential of input error signal (being the rate of change of error) are proportional.Differential coefficient K dbe used for regulating the power to error signal differential, suppress the variation of error, thereby avoid overshoot.PID controller preferably control method is: first adjust K pvalue, slowly strengthen K pvalue until cause after concussion, is turned K down slightly psystem is not shaken, then establish K ivalue, is generally made as K p1/3.Finally suitably establish K dvalue.Utilize above-mentioned control method can make the temperature-adjusting device of the present embodiment control more accurately the rotating speed of cooling water pump according to the cooling water water temperature that goes out water loop and water return loop.
The present embodiment can significantly be saved the energy consumption of cooling water recirculation system, and temperature-adjusting device of the present utility model is with low cost, utilizes described thermostatic servo-driver not need host computer, can work alone.
Although more than described the specific embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present utility model and essence, can make various changes or modifications to these embodiments, but these changes and modification all fall into protection domain of the present utility model.

Claims (2)

1. a temperature-adjusting device, for cooling water recirculation system, described cooling water recirculation system comprises that one goes out water loop, one water return loop and a cooling water pump, it is characterized in that, described temperature-adjusting device comprises a leaving water temperature sensor, one return water temperature sensor, one subtraction circuit and a PID controller, described subtraction circuit is made the input signal of subtrahend to go out the cooling water water temperature of water loop described in leaving water temperature sensor measurement, make the input signal of minuend with the cooling water water temperature of the described water return loop of return water temperature sensor measurement, described PID controller outputs control signals to described cooling water pump according to the output signal of described subtraction circuit and a desired temperature.
2. temperature-adjusting device as claimed in claim 1, it is characterized in that, described leaving water temperature sensor is connected with an input of described subtraction circuit by a temperature transmitter, and described return water temperature sensor is connected with another input of described subtraction circuit by another temperature transmitter.
CN201320712403.XU 2013-11-12 2013-11-12 Temperature adjusting device Expired - Fee Related CN203657143U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320712403.XU CN203657143U (en) 2013-11-12 2013-11-12 Temperature adjusting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320712403.XU CN203657143U (en) 2013-11-12 2013-11-12 Temperature adjusting device

Publications (1)

Publication Number Publication Date
CN203657143U true CN203657143U (en) 2014-06-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105627529A (en) * 2016-03-31 2016-06-01 西安建筑科技大学 Air conditioner control system and method based on variable speed integral PID type iterative learning algorithm
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
CN107980768A (en) * 2017-11-29 2018-05-04 广西藤县绿葛葛业有限公司 The store method that a kind of Pachyrhizua angulatus is placed vertically
CN111664500A (en) * 2020-05-12 2020-09-15 深圳市合信达控制系统有限公司 Heating temperature control method and device, computer equipment and readable storage medium

Cited By (5)

* Cited by examiner, † Cited by third party
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
CN105627529A (en) * 2016-03-31 2016-06-01 西安建筑科技大学 Air conditioner control system and method based on variable speed integral PID type iterative learning algorithm
CN105627529B (en) * 2016-03-31 2018-07-31 西安建筑科技大学 Air-conditioner control system and method based on PID controller with changing integration rate type Iterative Algorithm
CN107980768A (en) * 2017-11-29 2018-05-04 广西藤县绿葛葛业有限公司 The store method that a kind of Pachyrhizua angulatus is placed vertically
CN111664500A (en) * 2020-05-12 2020-09-15 深圳市合信达控制系统有限公司 Heating temperature control method and device, computer equipment and readable storage medium

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140618

Termination date: 20141112

EXPY Termination of patent right or utility model